阅读说明：本技术 一种混氢燃料发生装置及方法 (Hydrogen-mixed fuel generating device and method ) 是由 王思远 于 2021-08-27 设计创作，主要内容包括：本发明提供了一种混氢燃料发生装置及方法,所述发生装置包括燃料气预处理单元、氢气预处理单元、至少两级混氢燃料发生单元和混氢燃料后处理单元；氢气预处理单元的管路分为两支,分别与一级、二级混氢燃料发生单元相连,一级混氢燃料后处理单元分出支路与二级混氢燃料发生单元相连；混氢燃料发生单元包括气体喷射器和混氢燃料发生器,混氢燃料发生器沿气体流向依次包括混合室、整流室和扩压室。本发明通过混氢燃料发生单元的结构设计,解决燃料气与氢气混合时气体分层的问题,提高混合均匀性及热值稳定性,有助于提高混氢燃料的制取效率；所述装置通过多级混氢燃料发生单元的设置,能够满足对混氢燃料不同含氢浓度的要求,拓宽应用范围。(The invention provides a hydrogen-mixed fuel generating device and a method, wherein the generating device comprises a fuel gas pretreatment unit, a hydrogen pretreatment unit, at least two stages of hydrogen-mixed fuel generating units and a hydrogen-mixed fuel post-treatment unit; the pipeline of the hydrogen pretreatment unit is divided into two branches which are respectively connected with the primary hydrogen-mixed fuel generation unit and the secondary hydrogen-mixed fuel generation unit, and the branch of the primary hydrogen-mixed fuel post-treatment unit is connected with the secondary hydrogen-mixed fuel generation unit; the hydrogen-mixed fuel generation unit comprises a gas injector and a hydrogen-mixed fuel generator, and the hydrogen-mixed fuel generator sequentially comprises a mixing chamber, a rectifying chamber and a pressure-expanding chamber along the gas flow direction. According to the invention, through the structural design of the hydrogen-mixed fuel generation unit, the problem of gas stratification when fuel gas and hydrogen are mixed is solved, the mixing uniformity and the heat value stability are improved, and the preparation efficiency of the hydrogen-mixed fuel is improved; the device can meet the requirements of different hydrogen-containing concentrations of the mixed hydrogen fuel through the arrangement of the multi-stage mixed hydrogen fuel generating units, and the application range is widened.)

1. The hydrogen-mixed fuel generating device is characterized by comprising a fuel gas pretreatment unit, a hydrogen-mixed fuel generating unit and a hydrogen-mixed fuel post-treatment unit;

the hydrogen-mixed fuel generating unit comprises at least two stages, namely a primary hydrogen-mixed fuel generating unit and a secondary hydrogen-mixed fuel generating unit, wherein the outlet of the fuel gas preprocessing unit is connected with the inlet of the primary hydrogen-mixed fuel generating unit;

mix hydrogen fuel generating unit and include gas injector and mix hydrogen fuel generator, inside gas injector's export extended to mix hydrogen fuel generator, mix hydrogen fuel generator was equipped with the fuel gas entry, mix hydrogen fuel generator and follow gaseous flow direction and include mixing chamber, rectification chamber and diffusion chamber in proper order, follow gaseous flow direction the mixing chamber is the toper convergent pipe structure, the rectification chamber is the constant diameter tube structure, the diffusion chamber is the expansion pipe structure.

2. The generator of claim 1, wherein the fuel gas pretreatment unit comprises a fuel gas input line and a component disposed on the fuel gas input line;

preferably, the components on the fuel gas input pipeline sequentially comprise a fuel gas inlet joint, a fuel gas inlet isolation valve, a fuel gas flowmeter, a fuel gas pressure transmitter, a fuel gas thermometer, a fuel gas cut-off valve, a fuel gas control valve, a fuel gas pressure regulating valve and a fuel gas check valve;

preferably, the fuel gas pretreatment unit further comprises a first purge gas filling module and a fuel gas safety diffusion module, an outlet of the first purge gas filling module is connected to an inlet section of the fuel gas input pipeline, and an inlet of the fuel gas safety diffusion module is connected to the fuel gas input pipeline.

3. The generation apparatus according to claim 1 or 2, wherein the hydrogen pre-treatment unit comprises a hydrogen input line and a component disposed on the hydrogen input line;

preferably, the hydrogen input pipeline comprises a main hydrogen input pipeline and at least two branch hydrogen input pipelines;

preferably, the components on the hydrogen input main pipeline sequentially comprise a hydrogen inlet joint, a hydrogen inlet isolation valve, a hydrogen flowmeter, a hydrogen pressure transmitter, a hydrogen thermometer and a hydrogen shut-off valve;

preferably, when the hydrogen input branch pipeline comprises two sections, a first-stage hydrogen control valve, a first-stage hydrogen pressure regulating valve and a first-stage hydrogen check valve are sequentially arranged on the branch pipeline connected with the first-stage hydrogen mixed fuel generating unit, and a second-stage hydrogen stop valve, a second-stage hydrogen control valve, a second-stage hydrogen pressure regulating valve and a second-stage hydrogen check valve are sequentially arranged on the branch pipeline connected with the second-stage hydrogen mixed fuel generating unit;

preferably, the hydrogen pretreatment unit further comprises a second purge gas charging module and a hydrogen safety diffusion module, wherein an outlet of the second purge gas charging module is connected to an inlet section of the hydrogen input pipeline, and an inlet of the hydrogen safety diffusion module is connected to the hydrogen input main pipeline.

4. The generating device according to any one of claims 1 to 3, wherein the primary hydrogen-mixed fuel generating unit comprises a primary gas injector and a primary hydrogen-mixed fuel generator, and the secondary hydrogen-mixed fuel generating unit comprises a secondary gas injector and a secondary hydrogen-mixed fuel generator;

preferably, the gas injector comprises a gas injection pump connected with the outlet of the hydrogen input pipeline, and the tail end of the gas injector is provided with a nozzle;

preferably, the direction of the hydrogen injected by the nozzle of the gas injector is perpendicular to the direction of the fuel gas injected by the fuel gas inlet;

preferably, the diameter of the inlet end of the mixing chamber of the hydrogen-mixed fuel generator is 2-2.5 times of the diameter of the outlet end;

preferably, the length of the mixing chamber of the hydrogen-mixed fuel generator is 1.8-5 times of the diameter of the outlet end of the mixing chamber;

preferably, the diameter of the rectification chamber of the hydrogen-mixed fuel generator is the same as that of the outlet end of the mixing chamber;

preferably, the length of a rectification chamber of the hydrogen-mixed fuel generator is 1-4 times of the diameter of the rectification chamber;

preferably, the divergence angle of the diffusion chamber of the hydrogen-mixed fuel generator is 5-9 degrees;

preferably, the diameter of the inlet end of the diffusion chamber of the hydrogen-mixed fuel generator is the same as that of the rectification chamber, and the length of the diffusion chamber is 3.5-6 times of the diameter of the inlet end of the diffusion chamber.

5. The generating device according to any one of claims 1 to 4, wherein the primary hydrogen-mixed fuel post-processing unit comprises a primary hydrogen-mixed fuel output pipeline and a component arranged on the primary hydrogen-mixed fuel output pipeline;

preferably, the components on the primary hydrogen-mixed fuel output pipeline sequentially comprise a primary gas component analysis processor, a primary hydrogen-mixed fuel flowmeter, a primary hydrogen-mixed fuel pressure transmitter, a primary hydrogen-mixed fuel thermometer, a primary hydrogen-mixed fuel pressure regulating valve, a primary hydrogen-mixed fuel check valve, a primary outlet filter, a primary outlet pressure transmitter and a primary outlet cut-off valve;

preferably, the primary gas component analysis processor is electrically connected with both the fuel gas control valve and the primary hydrogen control valve;

preferably, the primary hydrogen-mixed fuel post-processing unit further comprises a primary hydrogen-mixed fuel safety diffusion module, and an inlet of the primary hydrogen-mixed fuel safety diffusion module is connected to a primary hydrogen-mixed fuel output pipeline;

preferably, the inlet of the branch pipeline on the first-stage hydrogen-mixed fuel output pipeline is arranged between the first-stage hydrogen-mixed fuel check valve and the first-stage outlet filter, and the branch pipeline is provided with a branch pipeline outlet stop valve.

6. The generating device according to any one of claims 1 to 5, wherein the secondary hydrogen-mixed fuel post-processing unit comprises a secondary hydrogen-mixed fuel output line and a component arranged on the secondary hydrogen-mixed fuel output line;

preferably, the components on the secondary hydrogen-mixed fuel output pipeline sequentially comprise a secondary gas component analysis processor, a secondary hydrogen-mixed fuel flow meter, a secondary hydrogen-mixed fuel pressure transmitter, a secondary hydrogen-mixed fuel thermometer, a secondary hydrogen-mixed fuel pressure regulating valve, a secondary hydrogen-mixed fuel check valve, a secondary outlet filter, a secondary outlet pressure transmitter and a secondary outlet cut-off valve;

preferably, the secondary gas composition analysis processor is electrically connected to a secondary hydrogen control valve;

preferably, the secondary hydrogen-mixed fuel post-processing unit further comprises a secondary hydrogen-mixed fuel safety diffusion module, and an inlet of the secondary hydrogen-mixed fuel safety diffusion module is connected to a secondary hydrogen-mixed fuel output pipeline.

7. A method for producing a hydrogen-mixed fuel using a generating device according to any one of claims 1 to 6, characterized in that it comprises the following steps:

(1) after the fuel gas and the hydrogen are independently pretreated, the fuel gas is introduced into a primary hydrogen-mixed fuel generating unit, the hydrogen is divided into at least two parts, one part of the hydrogen is injected into the primary hydrogen-mixed fuel generating unit to be mixed, rectified and diffused with the fuel gas, and the primary hydrogen-mixed fuel is obtained after post-treatment;

(2) and (2) injecting the other part of hydrogen in the step (1) into a secondary hydrogen mixed fuel generation unit, introducing part of the primary hydrogen mixed fuel obtained in the step (1) into the secondary hydrogen mixed fuel generation unit, mixing with the hydrogen, rectifying, diffusing, and performing post-treatment to obtain the secondary hydrogen mixed fuel.

8. The method of claim 7, wherein the fuel gas of step (1) comprises any one or a combination of at least two of natural gas, syngas, liquefied petroleum gas, or coal gas;

preferably, the pretreatment of the fuel gas and hydrogen in step (1) independently comprises detection of temperature, pressure and flow and adjustment of pressure and flow;

preferably, the pressure of the fuel gas in the step (1) before the fuel gas is introduced into the primary hydrogen-mixed fuel generation unit is 1.6-4 MPa, and the temperature is 5-50 ℃;

preferably, the pressure of the hydrogen injected into the primary hydrogen-mixed fuel generation unit in the step (1) is 10-70 MPa, and the temperature is 5-50 ℃.

9. The method according to claim 7 or 8, wherein the velocity of the primary hydrogen-mixed fuel leaving the primary hydrogen-mixed fuel generating unit in the step (1) is 10-30 m/s;

preferably, the post-treatment in the step (1) comprises the steps of analyzing the components of the primary hydrogen-mixed fuel, detecting the flow, the temperature and the pressure, adjusting the pressure and filtering the gas;

preferably, the pressure of the primary hydrogen-mixed fuel in the step (1) is 1.6-4 MPa, and the temperature is 5-50 ℃;

preferably, the volume fraction of the hydrogen in the first-stage hydrogen-mixed fuel in the step (1) is 10-80%.

10. The method according to any one of claims 7 to 9, wherein the pressure before the hydrogen gas is injected into the secondary hydrogen mixed fuel generation unit in the step (2) is 10 to 70MPa, and the temperature is 5 to 50 ℃;

preferably, the speed of the secondary hydrogen mixed fuel leaving the secondary hydrogen mixed fuel generating unit in the step (2) is 10-30 m/s;

preferably, the post-processing in the step (2) comprises component analysis of the secondary hydrogen-mixed fuel, detection of flow, temperature and pressure, pressure regulation and gas filtration;

preferably, the pressure of the secondary hydrogen mixing fuel in the step (2) is 1.6-4 MPa, and the temperature is 5-50 ℃;

preferably, the volume fraction of hydrogen in the secondary hydrogen-mixed fuel in the step (2) is 35-95%.

Technical Field

The invention belongs to the technical field of gas fuel, relates to a hydrogen-mixed fuel generating device and method, and particularly relates to a hydrogen-mixed fuel generating device and method suitable for fuel supply of a gas turbine.

Background

At present, with the continuous development and utilization of new energy, hydrogen energy is used as green energy, and with the stricter carbon emission, hydrogen fuel becomes a very good alternative fuel. The hydrogen doping of carbon-containing fuels such as natural gas is one of the main forms of hydrogen energy utilization, so that the fuel utilization rate can be improved, pollutants generated by terminal combustion of the natural gas can be reduced, and the hydrogen doping of gas fuels such as natural gas is an important way for upgrading energy consumption structures.

The gas turbine as an energy conversion device with wide application has the advantages of less pollution, high efficiency, strong flexibility, compact structure and the like, is widely applied to the field of power generation, and has very important significance for production and life in reliable, stable and economic operation. Natural gas is the main fuel of active gas turbines, and with the continuous shrinkage of the market of large gas turbines for traditional natural gas power generation, hydrogen-burning gas turbines enter a high-speed development stage, so that the preparation of natural gas and hydrogen mixed fuel and the combustion of the natural gas and hydrogen mixed fuel in the gas turbines become the key points of current research.

The combustion speed of hydrogen is higher than that of natural gas, the flame property is changed due to the change of the mixing ratio of hydrogen in the fuel, the risk of backfire when the natural gas and the hydrogen are co-combusted is far higher than that when the natural gas is combusted, and therefore higher requirements are provided for the mixing uniformity and the combustion stability of the hydrogen-mixed fuel. CN 105038885a discloses a preparation system and a preparation method of a low-carbon gas fuel, the preparation system includes a natural gas storage tank, a hydrogen storage tank, a mixer and a mixed gas storage tank, the natural gas storage tank and the hydrogen storage tank are connected with the input end of the mixer, the output end of the mixer is connected with the mixed gas storage tank; the system only introduces an integral system for mixing natural gas and hydrogen, does not specify the specific structure of the mixer and how to improve the gas mixing degree, and has poor adjustability and difficult control of the hydrogen mixing ratio.

CN 212819192U discloses a natural gas and hydrogen mixing system, which is composed of a natural gas input pipeline, a hydrogen input pipeline, a high-precision static mixer and a mixed gas output pipeline, wherein the natural gas input pipeline and the hydrogen input pipeline are connected with the front part of the high-precision static mixer, the mixed gas output pipeline is connected with the tail end of the high-precision static mixer, the natural gas input pipeline is provided with a natural gas inlet, a natural gas inlet valve and a natural gas flowmeter, and the hydrogen input pipeline is provided with a hydrogen inlet, a hydrogen inlet valve, a cut-off valve, a filter, a pressure regulator, a hydrogen pressure gauge, a hydrogen flowmeter, a check valve and the like; the device does not introduce the structure of static mixer yet, and the mode of static mixing is unfavorable for the quick intensive mixing of hydrogen and natural gas, causes the calorific value unstable, is difficult to obtain the mixed fuel of multiple mixture ratio simultaneously.

In summary, for the formation of the hydrogen-mixed fuel, the device structure needs to be improved to promote the mixing of two gases, ensure the mixing uniformity, improve the safety of the mixing process, and obtain the mixed fuel with more than one component ratio to meet the application requirements.

Disclosure of Invention

The device mixes the fuel gas and the hydrogen in the hydrogen mixed fuel generating unit, improves the mixing uniformity and the heat value stability of the fuel gas and the hydrogen in the hydrogen mixed fuel generating unit through the structural design of the hydrogen mixed fuel generating unit, is convenient to adjust the component proportion of the hydrogen mixed fuel, can quickly obtain the hydrogen mixed fuel with different mixing proportions through the arrangement of the multi-stage hydrogen mixed fuel generating unit, meets the requirements of users on different hydrogen-containing concentrations of the hydrogen mixed fuel, and improves the flexibility of the device.

In order to achieve the purpose, the invention adopts the following technical scheme:

in one aspect, the invention provides a hydrogen-mixed fuel generating device, which comprises a fuel gas pretreatment unit, a hydrogen-mixed fuel generating unit and a hydrogen-mixed fuel post-treatment unit;

the hydrogen-mixed fuel generating unit comprises at least two stages, namely a primary hydrogen-mixed fuel generating unit and a secondary hydrogen-mixed fuel generating unit, wherein the outlet of the fuel gas preprocessing unit is connected with the inlet of the primary hydrogen-mixed fuel generating unit;

mix hydrogen fuel generating unit and include gas injector and mix hydrogen fuel generator, inside gas injector's export extended to mix hydrogen fuel generator, mix hydrogen fuel generator was equipped with the fuel gas entry, mix hydrogen fuel generator and follow gaseous flow direction and include mixing chamber, rectification chamber and diffusion chamber in proper order, follow gaseous flow direction the mixing chamber is the toper convergent pipe structure, the rectification chamber is the constant diameter tube structure, the diffusion chamber is the expansion pipe structure.

In the invention, for the preparation of the hydrogen-mixed fuel, a proper device is required to be selected to realize the rapid and uniform mixing of the fuel gas and the hydrogen, the hydrogen-mixed fuel generation device is integrally divided into four parts, namely a fuel gas pretreatment unit, a hydrogen-mixed fuel generation unit and a hydrogen-mixed fuel post-treatment unit, so that the formation process of the hydrogen-mixed fuel is clarified, wherein the hydrogen-mixed fuel generation unit is at least provided with two stages, such as two stages, three stages or four stages, and the hydrogen-mixed fuel obtained from the previous stage is doped with hydrogen again to realize the mixing step of the fuel gas and the hydrogen so as to obtain the hydrogen-mixed fuels with different hydrogen proportions and meet the requirements of different users; the structure of the hydrogen-mixed fuel generating unit comprises a gas injector and a hydrogen-mixed fuel generator, the gas injector can convert the pressure energy of high-pressure gas into kinetic energy, the relatively low-pressure fuel gas is injected and mixed by utilizing higher injection speed, and the hydrogen gas and the fuel gas are mixed, rectified and pressure is recovered through structure division in the hydrogen-mixed fuel generator, so that the energy consumption loss in the fuel mixing process is reduced, the mixing uniformity and the gas supply stability are improved, the hydrogen-mixed fuel preparation efficiency is high, the cost is low, and the popularization and the application of the hydrogen-mixed fuel are facilitated.

The following technical solutions are preferred technical solutions of the present invention, but not limited to the technical solutions provided by the present invention, and technical objects and advantageous effects of the present invention can be better achieved and achieved by the following technical solutions.

As a preferable technical scheme of the invention, the fuel gas pretreatment unit comprises a fuel gas input pipeline and a component arranged on the fuel gas input pipeline.

Preferably, the subassembly on the fuel gas input pipeline includes fuel gas inlet joint, fuel gas inlet isolating valve, fuel gas flowmeter, fuel gas pressure transmitter, fuel gas thermometer, fuel gas trip valve, fuel gas control valve, fuel gas pressure regulating valve and fuel gas check valve in proper order.

Preferably, the fuel gas pretreatment unit further comprises a first purge gas filling module and a fuel gas safety diffusion module, an outlet of the first purge gas filling module is connected to an inlet section of the fuel gas input pipeline, and an inlet of the fuel gas safety diffusion module is connected to the fuel gas input pipeline.

In the invention, the fuel gas pretreatment unit is mainly used for treating the fuel gas before mixing with transportation and distribution, wherein the fuel gas inlet joint is mainly used for insulating and isolating the fuel gas pretreatment unit and an upstream pipeline thereof, namely the inlet joint is made of an insulating material so as to protect equipment from electrochemical corrosion and prolong the service life; the fuel gas inlet isolation valve is used for cutting off the upstream fuel gas supply; the fuel gas flowmeter is used for measuring the air inlet flow of the fuel gas and has the functions of calculating the instantaneous flow and the accumulated flow; the fuel gas pressure transmitter is used for measuring the air inlet pressure of the fuel gas; the fuel gas thermometer is used for measuring the intake temperature of the fuel gas; the fuel gas cut-off valve is used for quickly cutting off the supply of fuel gas under the accident condition; the fuel gas control valve is used for regulating the flow of the fuel gas entering the downstream; the fuel gas pressure regulating valve is used for regulating and stabilizing the fuel gas to the pressure required by the downstream hydrogen-mixed fuel generator; the fuel gas check valve is used for preventing fuel gas at the outlet of the pretreatment unit from flowing backwards.

In the invention, the purge gas in the first purge gas charging module is mainly selected from protective gas such as nitrogen, inert gas and the like, is used for purging the fuel gas pretreatment unit, and is used for removing combustible gas of pipelines and equipment in the unit during start-stop and overhaul maintenance periods so as to prevent explosion; the fuel gas safety diffusion module is used for normal diffusion of fuel gas and unit overpressure safety protection during unit shutdown and overhaul and maintenance.

As a preferable technical scheme of the invention, the hydrogen pretreatment unit comprises a hydrogen input pipeline and a component arranged on the hydrogen input pipeline.

Preferably, the hydrogen input pipeline comprises a main hydrogen input pipeline and at least two branch hydrogen input pipelines, such as two, three or four pipelines.

Preferably, the components on the hydrogen input main pipeline sequentially comprise a hydrogen inlet joint, a hydrogen inlet isolation valve, a hydrogen flowmeter, a hydrogen pressure transmitter, a hydrogen thermometer and a hydrogen shut-off valve.

Preferably, when the hydrogen input branch pipeline comprises two sections, a first-stage hydrogen control valve, a first-stage hydrogen pressure regulating valve and a first-stage hydrogen check valve are sequentially arranged on the branch pipeline connected with the first-stage hydrogen-mixed fuel generating unit, and a second-stage hydrogen stop valve, a second-stage hydrogen control valve, a second-stage hydrogen pressure regulating valve and a second-stage hydrogen check valve are sequentially arranged on the branch pipeline connected with the second-stage hydrogen-mixed fuel generating unit.

Preferably, the hydrogen pretreatment unit further comprises a second purge gas charging module and a hydrogen safety diffusion module, wherein an outlet of the second purge gas charging module is connected to an inlet section of the hydrogen input pipeline, and an inlet of the hydrogen safety diffusion module is connected to the hydrogen input main pipeline.

In the invention, the hydrogen pretreatment unit is mainly used for treating and distributing hydrogen before mixing, wherein the hydrogen inlet joint is mainly used for insulating and isolating the hydrogen pretreatment unit and an upstream pipeline thereof, namely the inlet joint is made of an insulating material so as to protect equipment from electrochemical corrosion and prolong the service life; the hydrogen inlet isolation valve is used for cutting off the upstream hydrogen supply; the hydrogen flowmeter is used for measuring the inflow rate of hydrogen and has the functions of calculating the instantaneous flow rate and the accumulated flow rate; the hydrogen pressure transmitter is used for measuring the inlet pressure of hydrogen; the hydrogen thermometer is used for measuring the inlet gas temperature of the hydrogen; the hydrogen stop valve is used for rapidly cutting off hydrogen supply under accident conditions; the primary and secondary hydrogen control valves are used for regulating the flow of hydrogen entering the downstream; the primary and secondary hydrogen pressure regulating valves are used for regulating and stabilizing hydrogen to the pressure required by the downstream hydrogen-mixed fuel generator; the primary and secondary hydrogen check valves are used for preventing the hydrogen at the outlet of the pretreatment unit from flowing backwards; the second-stage hydrogen shut-off valve is used for shutting off the supply of hydrogen gas to the second-stage hydrogen-mixed fuel generation unit from the upstream.

In addition, a first differential pressure transmitter is arranged between the fuel gas pretreatment unit and the hydrogen gas pretreatment unit, particularly between a pipeline in front of the fuel gas check valve and a pipeline in front of the primary hydrogen gas check valve, and is used for monitoring the differential pressure between the outlet hydrogen gas of the primary branch of the hydrogen gas pretreatment unit and the outlet fuel gas of the fuel gas pretreatment unit.

In the invention, the purge gas in the second purge gas charging module is mainly selected from protective gas such as nitrogen, inert gas and the like, is used for purging the hydrogen pretreatment unit and the hydrogen-mixed fuel post-treatment unit, and is used for removing combustible gas of pipelines and equipment in the unit during start-stop and overhaul maintenance periods to prevent explosion; the hydrogen safety diffusion module is used for normal hydrogen diffusion and unit overpressure safety protection during unit shutdown and overhaul and maintenance.

As a preferable technical solution of the present invention, the primary hydrogen mixed fuel generating unit includes a primary gas injector and a primary hydrogen mixed fuel generator, and the secondary hydrogen mixed fuel generating unit includes a secondary gas injector and a secondary hydrogen mixed fuel generator.

Preferably, the gas injector comprises a gas injection pump connected with the outlet of the hydrogen input pipeline, and the tail end of the gas injector is provided with a nozzle.

Preferably, the direction of the hydrogen injected by the nozzle of the gas injector is perpendicular to the direction of the fuel gas injected by the fuel gas inlet.

In the invention, the hydrogen-mixed fuel generating unit is mainly used for realizing the effective mixing of fuel gas and hydrogen to generate uniform hydrogen-mixed fuel with specific hydrogen-mixed concentration and gas supply parameters; the gas injector is used for injecting high-pressure hydrogen, converting pressure energy of the high-pressure hydrogen into kinetic energy, obtaining high speed when the hydrogen is sprayed out through the nozzle, and injecting and mixing surrounding relatively low-pressure fuel gas; the mixed hydrogen fuel generator is used for mixing, rectifying and diffusing the mixed hydrogen fuel, the mixing chamber is used for providing a mixing space of hydrogen and fuel gas, the rectifying chamber is used for improving mixing uniformity and achieving effective rectification, the diffusing chamber is used for recovering the pressure of the mixed hydrogen fuel and reducing the speed loss of the generator outlet, if the structure of the diffusing chamber is lacked, the mixed hydrogen fuel still maintains higher kinetic energy, the static pressure recovery is insufficient, the remaining speed loss is large, the pipeline loss along the way is large, and the gas supply pressure of the downstream mixed hydrogen fuel is reduced.

Preferably, the diameter of the inlet end of the mixing chamber of the hydrogen-mixed fuel generator is 2 to 2.5 times, such as 2 times, 2.1 times, 2.2 times, 2.3 times, 2.4 times or 2.5 times, etc., of the diameter of the outlet end, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.

Preferably, the length of the mixing chamber of the hydrogen-mixed fuel generator is 1.8 to 5 times, for example, 1.8 times, 2.5 times, 3 times, 3.5 times, 4 times, 4.5 times, 5 times, etc., of the diameter of the outlet end of the mixing chamber, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.

Preferably, the diameter of the rectification chamber of the hydrogen-mixed fuel generator is the same as the diameter of the outlet end of the mixing chamber.

Preferably, the length of the rectification chamber of the hydrogen-mixed fuel generator is 1 to 4 times, for example, 1 time, 1.5 times, 2 times, 2.5 times, 3 times, 3.5 times or 4 times, the diameter of the rectification chamber, but the present invention is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.

Preferably, the divergence angle of the diffusion chamber of the hydrogen-mixed fuel generator is 5 to 9 degrees, for example, 5 degrees, 6 degrees, 7 degrees, 8 degrees, or 9 degrees, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.

Preferably, the diameter of the inlet end of the diffusion chamber of the hydrogen-mixed fuel generator is the same as the diameter of the rectification chamber, and the length of the diffusion chamber is 3.5 to 6 times, for example, 3.5 times, 4 times, 4.5 times, 5 times, 5.5 times, or 6 times, the diameter of the inlet end of the diffusion chamber, but the invention is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.

As a preferable technical scheme of the invention, the primary hydrogen-mixed fuel post-processing unit comprises a primary hydrogen-mixed fuel output pipeline and an assembly arranged on the primary hydrogen-mixed fuel output pipeline.

Preferably, the subassembly on the one-level mixed hydrogen fuel output pipeline includes gaseous composition analysis and processing appearance of one-level, one-level mixed hydrogen fuel flowmeter, one-level mixed hydrogen fuel pressure transmitter, one-level mixed hydrogen fuel thermometer, one-level mixed hydrogen fuel pressure regulating valve, one-level mixed hydrogen fuel check valve, one-level outlet filter, one-level outlet pressure transmitter and one-level export trip valve in proper order.

Preferably, the primary gas composition analysis processor is electrically connected to both the fuel gas control valve and the primary hydrogen control valve.

Preferably, the primary hydrogen-mixed fuel post-processing unit further comprises a primary hydrogen-mixed fuel safety diffusion module, and an inlet of the primary hydrogen-mixed fuel safety diffusion module is connected to a primary hydrogen-mixed fuel output pipeline.

Preferably, the inlet of the branch pipeline on the first-stage hydrogen-mixed fuel output pipeline is arranged between the first-stage hydrogen-mixed fuel check valve and the first-stage outlet filter, and the branch pipeline is provided with a branch pipeline outlet stop valve.

In the invention, the hydrogen-mixed fuel post-treatment unit is used for treating and distributing the hydrogen-containing fuel gas mixed according to a specific proportion; the gas component analysis processor is used for analyzing the components of the hydrogen-mixed fuel at the outlet of the hydrogen-mixed fuel generator in real time, calculating the heat value of the hydrogen-mixed fuel, sending feedback signals to the fuel control valve and the hydrogen control valve, dynamically adjusting the opening degree of the fuel control valve and the hydrogen control valve in real time, controlling the flow ratio of the fuel gas and the hydrogen gas, and realizing the dynamic adjustment of the hydrogen-mixed concentration; the hydrogen-mixed fuel flow meter is used for measuring the flow of the hydrogen-mixed fuel and has the functions of calculating the instantaneous flow and the accumulated flow; the hydrogen-mixed fuel pressure transmitter is used for measuring the pressure of the hydrogen-mixed fuel before pressure regulation; the hydrogen-mixed fuel thermometer is used for measuring the temperature of the hydrogen-mixed fuel; the hydrogen-mixed fuel pressure regulating valve is used for regulating and stabilizing the hydrogen-mixed fuel to the pressure required by a user; the hydrogen-mixed fuel check valve is used for preventing the hydrogen-mixed fuel at the outlet from flowing backwards; the outlet filter is used for separating solid particles and small liquid drops in the hydrogen-mixed fuel, and meets the quality requirement of a user on the hydrogen-mixed fuel; the outlet pressure transmitter is used for measuring the outlet pressure of the hydrogen-mixed fuel main pipe; the outlet shut-off valve is used for cutting off the supply of the hydrogen-mixed fuel to the user.

In the invention, the hydrogen-mixed fuel safety diffusion module is used for normal diffusion of the hydrogen-mixed fuel and unit overpressure safety protection during shutdown, overhaul and maintenance of the hydrogen-mixed fuel post-processing unit; a branch line outlet shut-off valve provided on the branch line is used for shutting off the supply of the hydrogen-mixed fuel to the secondary hydrogen-mixed fuel generation unit.

As a preferable technical scheme, the secondary hydrogen mixed fuel post-processing unit comprises a secondary hydrogen mixed fuel output pipeline and an assembly arranged on the secondary hydrogen mixed fuel output pipeline.

Preferably, the subassembly on the second grade mixes hydrogen fuel output pipeline includes second grade gas composition analysis and processing appearance, second grade and mixes hydrogen fuel flowmeter, second grade and mix hydrogen fuel pressure transmitter, second grade and mix hydrogen fuel thermometer, second grade and mix hydrogen fuel pressure regulating valve, second grade and mix hydrogen fuel check valve, second grade exit filter, second grade exit pressure transmitter and second grade export trip valve in proper order.

Preferably, the secondary gas composition analysis processor is electrically connected to a secondary hydrogen control valve.

Preferably, the secondary hydrogen-mixed fuel post-processing unit further comprises a secondary hydrogen-mixed fuel safety diffusion module, and an inlet of the secondary hydrogen-mixed fuel safety diffusion module is connected to a secondary hydrogen-mixed fuel output pipeline.

In the invention, the corresponding components on the secondary hydrogen-mixed fuel post-processing unit have the same functions as the components in the primary hydrogen-mixed fuel post-processing unit, but a second differential pressure transmitter is arranged between a branch pipeline of a primary hydrogen-mixed fuel output pipeline and the front of a secondary hydrogen check valve on a hydrogen input branch pipeline and is used for monitoring the pressure difference between the outlet hydrogen of a secondary branch of the hydrogen pre-processing unit and the outlet hydrogen-mixed fuel of the primary hydrogen-mixed fuel post-processing unit.

In another aspect, the present invention provides a method for producing a hydrogen-mixed fuel by using the above-mentioned generating apparatus, the method comprising the steps of:

(1) after the fuel gas and the hydrogen are independently pretreated, the fuel gas is introduced into a primary hydrogen-mixed fuel generating unit, the hydrogen is divided into at least two parts, one part of the hydrogen is injected into the primary hydrogen-mixed fuel generating unit to be mixed, rectified and diffused with the fuel gas, and the primary hydrogen-mixed fuel is obtained after post-treatment;

(2) and (2) injecting the other part of hydrogen in the step (1) into a secondary hydrogen mixed fuel generation unit, introducing part of the primary hydrogen mixed fuel obtained in the step (1) into the secondary hydrogen mixed fuel generation unit, mixing with the hydrogen, rectifying, diffusing, and performing post-treatment to obtain the secondary hydrogen mixed fuel.

As a preferred technical scheme of the invention, the fuel gas in the step (1) comprises any one or a combination of at least two of natural gas, synthesis gas, liquefied petroleum gas or coal gas, and typical but non-limiting examples of the combination are as follows: combinations of natural gas and syngas, combinations of syngas and liquefied petroleum gas, combinations of natural gas, syngas, and coal gas, combinations of syngas, liquefied petroleum gas, and coal gas, and the like.

In the invention, the fuel gas is not particularly limited to natural gas, and can also comprise other gas fuels such as synthesis gas, liquefied petroleum gas or low-calorific-value gas and the like which are suitable for the gas turbine.

Preferably, the pretreatment of the fuel gas and hydrogen in step (1) independently comprises detection of temperature, pressure and flow and regulation of pressure and flow.

Preferably, the pressure of the fuel gas before the fuel gas is introduced into the primary hydrogen-mixed fuel generation unit in the step (1) is 1.6 to 4MPa, such as 1.6MPa, 2MPa, 2.5MPa, 3MPa, 3.5MPa or 4MPa, but is not limited to the recited values, and other values not recited in the range of the values are also applicable; the temperature is 5 to 50 ℃, for example, 5 ℃, 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃, 40 ℃ or 50 ℃, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.

Preferably, the pressure before the hydrogen gas is injected into the primary mixed hydrogen fuel generation unit in the step (1) is 10 to 70MPa, such as 10MPa, 20MPa, 30MPa, 40MPa, 50MPa, 60MPa or 70MPa, but not limited to the recited values, and other values in the range of the recited values are also applicable; the temperature is 5 to 50 ℃, for example, 5 ℃, 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃, 40 ℃ or 50 ℃, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.

As a preferable technical scheme of the invention, the speed of the primary mixed hydrogen fuel in the step (1) leaving the primary mixed hydrogen fuel generating unit is 10-30 m/s, such as 10m/s, 15m/s, 20m/s, 25m/s or 30m/s, but the invention is not limited to the values listed, and other values not listed in the range of the values are also applicable.

Preferably, the post-treatment in step (1) comprises the steps of analyzing the components of the primary hydrogen-mixed fuel, detecting the flow, the temperature and the pressure, adjusting the pressure and filtering the gas.

Preferably, the pressure of the primary hydrogen-mixed fuel in the step (1) is 1.6 to 4MPa, such as 1.6MPa, 2MPa, 2.5MPa, 3MPa, 3.5MPa or 4MPa, but not limited to the recited values, and other values in the range of the recited values are also applicable; the temperature is 5 to 50 ℃, for example, 5 ℃, 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃, 40 ℃ or 50 ℃, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.

Preferably, the volume fraction of the hydrogen in the primary hydrogen-mixed fuel in the step (1) is 10-80%, for example, 10%, 20%, 30%, 40%, 50%, 60%, or 80%, etc., but not limited to the recited values, and other values not recited in the range of the values are also applicable.

In a preferred embodiment of the present invention, the pressure before the hydrogen gas is injected into the secondary hydrogen-mixed fuel generation unit in step (2) is 10 to 70MPa, for example, 10MPa, 20MPa, 30MPa, 40MPa, 50MPa, 60MPa or 70MPa, but the pressure is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable; the temperature is 5 to 50 ℃, for example, 5 ℃, 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃, 40 ℃ or 50 ℃, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.

Preferably, the secondary hydrogen mixed fuel in the step (2) leaves the secondary hydrogen mixed fuel generating unit at a speed of 10-30 m/s, such as 10m/s, 15m/s, 20m/s, 25m/s or 30m/s, but not limited to the recited values, and other non-recited values in the range of the values are also applicable.

Preferably, the post-processing in the step (2) comprises component analysis of the secondary hydrogen-mixed fuel, detection of flow, temperature and pressure, pressure regulation and gas filtration.

Preferably, the pressure of the secondary hydrogen-mixed fuel in the step (2) is 1.6 to 4MPa, such as 1.6MPa, 2MPa, 2.5MPa, 3MPa, 3.5MPa or 4MPa, but not limited to the recited values, and other values in the range are also applicable; the temperature is 5 to 50 ℃, for example, 5 ℃, 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃, 40 ℃ or 50 ℃, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.

Preferably, the volume fraction of hydrogen in the secondary hydrogen-mixed fuel in the step (2) is 35-95%, for example, 35%, 40%, 50%, 60%, 70%, 80%, 90% or 95%, etc., but not limited to the recited values, and other values not recited in the range of the recited values are also applicable.

In the invention, when the hydrogen concentration of the hydrogen-mixed fuel prepared by the first-stage hydrogen-mixed fuel generator can not meet the requirement of a user, the mixing proportion of hydrogen in the hydrogen-mixed fuel is gradually increased in stages through cascade connection of the second-stage hydrogen-mixed fuel generator until the requirement of the user is met, and the cascade connection stage is determined by depending on the requirement of the hydrogen concentration of the user.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the device, the fuel gas and the hydrogen are mixed in the hydrogen-mixed fuel generation unit, the fuel gas with relatively low pressure is injected and mixed by utilizing the higher injection speed of the hydrogen through the structural design of the hydrogen-mixed fuel generation unit, then the hydrogen and the fuel gas are mixed, rectified and pressure is recovered, the external energy consumption in the fuel mixing process is reduced, the problem of gas stratification when the traditional fuel gas and the hydrogen are mixed is solved, the generation mode of the hydrogen-mixed fuel is innovated, the mixing uniformity and the heat value stability of the hydrogen-mixed fuel are improved, the fluctuation range of the wonderful white index of the hydrogen-mixed fuel can be controlled within +/-5% of a target value, no extra electric energy is consumed in the mixing process, the preparation efficiency of the hydrogen-mixed fuel is improved, and the preparation cost is reduced;

(2) the device can quickly obtain the hydrogen-mixed fuels with different mixing ratios by arranging the multi-stage hydrogen-mixed fuel generating units, meets the requirements of users on different hydrogen-containing concentrations of the hydrogen-mixed fuels, increases the flexibility of the configuration of the hydrogen-mixed fuels, and widens the application range of the hydrogen-mixed fuel preparation scheme.

Drawings

Fig. 1 is a schematic structural view of a hydrogen-mixed fuel generation device provided in embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of a primary hydrogen-mixed fuel generation unit provided in embodiment 1 of the present invention;

wherein, 1-fuel gas pretreatment unit, 11-fuel gas inlet joint, 12-fuel gas inlet isolation valve, 13-fuel gas flowmeter, 14-fuel gas pressure transmitter, 15-fuel gas thermometer, 16-fuel gas cut-off valve, 17-fuel gas control valve, 18-fuel gas pressure regulating valve, 19-fuel gas check valve, 110-first purge gas filling module, 111-fuel gas safety diffusing module, 2-hydrogen gas pretreatment unit, 21-hydrogen gas inlet joint, 22-hydrogen gas inlet isolation valve, 23-hydrogen gas flowmeter, 24-hydrogen gas pressure transmitter, 25-hydrogen gas thermometer, 26-hydrogen gas cut-off valve, 271-primary hydrogen gas control valve, 281-primary hydrogen gas pressure regulating valve, 291-primary hydrogen gas check valve, 262-two-stage hydrogen shut-off valve, 272-two-stage hydrogen control valve, 282-two-stage hydrogen pressure regulating valve, 292-two-stage hydrogen check valve, 210-second purge gas charging module, 211-hydrogen safety diffusing module, 3-first-stage mixed hydrogen fuel generating unit, 31-first-stage gas injector, 32-first-stage mixed hydrogen fuel generator, 321-mixing chamber, 322-rectifying chamber, 323-diffusion chamber, 4-first-stage mixed hydrogen fuel post-processing unit, 41-first-stage gas component analysis processor, 42-first-stage mixed hydrogen fuel flowmeter, 43-first-stage mixed hydrogen fuel pressure transmitter, 44-first-stage mixed hydrogen fuel thermometer, 45-first-stage mixed hydrogen fuel pressure regulating valve, 46-first-stage mixed hydrogen fuel check valve, 47-first-stage outlet filter, 48-a primary outlet pressure transmitter, 49-a primary outlet cut-off valve, 410-a primary hydrogen-mixed fuel safety diffusion module, 411-a branch pipeline outlet cut-off valve, 5-a secondary hydrogen-mixed fuel generation unit, 51-a secondary gas injector, 52-a secondary hydrogen-mixed fuel generator, 6-a secondary hydrogen-mixed fuel post-processing unit, 61-a secondary gas component analysis processor, 62-a secondary hydrogen-mixed fuel flowmeter, 63-a secondary hydrogen-mixed fuel pressure transmitter, 64-a secondary hydrogen-mixed fuel thermometer, 65-a secondary hydrogen-mixed fuel pressure regulating valve, 66-a secondary hydrogen-mixed fuel check valve, 67-a secondary outlet filter, 68-a secondary outlet pressure transmitter, 69-a secondary outlet cut-off valve and 610-a secondary hydrogen-mixed fuel safety diffusion module.

Detailed Description

In order to better illustrate the present invention and facilitate the understanding of the technical solutions of the present invention, the present invention is further described in detail below. However, the following examples are only simple examples of the present invention and do not represent or limit the scope of the present invention, which is defined by the claims.

The following are typical but non-limiting examples of the invention:

example 1:

the embodiment provides a hydrogen-mixed fuel generating device, the structural schematic diagram of which is shown in fig. 1, and the hydrogen-mixed fuel generating device comprises a fuel gas pretreatment unit 1, a hydrogen gas pretreatment unit 2, a hydrogen-mixed fuel generating unit and a hydrogen-mixed fuel post-treatment unit;

the hydrogen-mixed fuel generating unit comprises two stages, namely a primary hydrogen-mixed fuel generating unit 3 and a secondary hydrogen-mixed fuel generating unit 5, wherein the outlet of the fuel gas preprocessing unit 1 is connected with the inlet of the primary hydrogen-mixed fuel generating unit 3, the pipeline of the hydrogen gas preprocessing unit 2 is divided into two branches which are respectively connected with the inlets of the primary hydrogen-mixed fuel generating unit 3 and the secondary hydrogen-mixed fuel generating unit 5, the outlets of the primary hydrogen-mixed fuel generating unit 3 and the secondary hydrogen-mixed fuel generating unit 5 are correspondingly connected with a primary hydrogen-mixed fuel post-processing unit 4 and a secondary hydrogen-mixed fuel post-processing unit 6, and the primary hydrogen-mixed fuel post-processing unit 4 is divided into one branch pipeline which is connected with the inlet of the secondary hydrogen-mixed fuel generating unit 5;

the primary hydrogen-mixed fuel generation unit 3 is shown in fig. 2, and includes a primary gas injector 31 and a primary hydrogen-mixed fuel generator 32, an outlet of the primary gas injector 31 extends into the primary hydrogen-mixed fuel generator 32, the primary hydrogen-mixed fuel generator 32 is provided with a fuel gas inlet, the primary hydrogen-mixed fuel generator 32 sequentially includes a mixing chamber 321, a rectifying chamber 322 and a pressure expansion chamber 323 along a gas flow direction, the mixing chamber 321 is in a tapered contraction tube structure along the gas flow direction, the rectifying chamber 322 is in an equal-diameter tube structure, and the pressure expansion chamber 323 is in an expansion tube structure;

the secondary hydrogen-mixed fuel generation unit 5 includes a secondary gas injector 51 and a secondary hydrogen-mixed fuel generator 52, and the structures of the secondary gas injector 51 and the secondary hydrogen-mixed fuel generator 52 are the same as those of the corresponding primary gas injector 31 and the primary hydrogen-mixed fuel generator 32.

The fuel gas pretreatment unit 1 comprises a fuel gas input pipeline and an assembly arranged on the fuel gas input pipeline.

The components on the fuel gas input pipeline sequentially comprise a fuel gas inlet joint 11, a fuel gas inlet isolation valve 12, a fuel gas flowmeter 13, a fuel gas pressure transmitter 14, a fuel gas thermometer 15, a fuel gas cut-off valve 16, a fuel gas control valve 17, a fuel gas pressure regulating valve 18 and a fuel gas check valve 19.

The fuel gas pretreatment unit 1 further comprises a first purge gas filling module 110 and a fuel gas safety diffusion module 111, wherein an outlet of the first purge gas filling module 110 is connected to an inlet section of a fuel gas input pipeline, and an inlet of the fuel gas safety diffusion module 111 is connected to the fuel gas input pipeline; the purge gas is nitrogen.

The hydrogen pretreatment unit 2 comprises a hydrogen input pipeline and an assembly arranged on the hydrogen input pipeline; the hydrogen input pipeline comprises a section of hydrogen input main pipeline and two sections of hydrogen input branch pipelines.

The components on the hydrogen input main pipeline sequentially comprise a hydrogen inlet joint 21, a hydrogen inlet isolation valve 22, a hydrogen flowmeter 23, a hydrogen pressure transmitter 24, a hydrogen thermometer 25 and a hydrogen shut-off valve 26;

the hydrogen input branch pipeline comprises two sections, a first-stage hydrogen control valve 271, a first-stage hydrogen pressure regulating valve 281 and a first-stage hydrogen check valve 291 are sequentially arranged on the branch pipeline connected with the first-stage hydrogen mixed fuel generating unit 3, and a second-stage hydrogen stop valve 262, a second-stage hydrogen control valve 272, a second-stage hydrogen pressure regulating valve 282 and a second-stage hydrogen check valve 292 are sequentially arranged on the branch pipeline connected with the second-stage hydrogen mixed fuel generating unit 5;

the hydrogen pretreatment unit 2 further comprises a second purge gas charging module 210 and a hydrogen safety diffusion module 211, wherein an outlet of the second purge gas charging module 210 is connected to an inlet section of a hydrogen input pipeline, and an inlet of the hydrogen safety diffusion module 211 is connected to a hydrogen input main pipeline; the purge gas is nitrogen.

The primary gas ejector 31 comprises a gas ejector pump connected with an outlet of the hydrogen input pipeline, and a nozzle is arranged at the tail end of the primary gas ejector 31; the direction of the hydrogen sprayed by the nozzle of the primary gas sprayer 31 is vertical to the direction of the fuel gas sprayed by the fuel gas inlet.

The diameter of the inlet end of the mixing chamber 321 of the primary hydrogen-mixed fuel generator 32 is 2 times of the diameter of the outlet end, and the length of the mixing chamber 321 is 3 times of the diameter of the outlet end of the mixing chamber 321; the diameter of the rectifying chamber 322 of the primary hydrogen-mixed fuel generator 32 is the same as that of the outlet end of the mixing chamber 321, and the length of the rectifying chamber 322 of the primary hydrogen-mixed fuel generator 32 is 2.5 times of the diameter of the rectifying chamber 322; the divergence angle of the diffusion chamber 323 of the primary hydrogen-mixed fuel generator 32 is 8 degrees, the diameter of the inlet end of the diffusion chamber 323 is the same as that of the rectification chamber 322, and the length of the diffusion chamber 323 is 5 times of the diameter of the inlet end of the diffusion chamber 323.

The primary hydrogen-mixed fuel post-processing unit 4 comprises a primary hydrogen-mixed fuel output pipeline and components arranged on the primary hydrogen-mixed fuel output pipeline.

The subassembly on the one-level mixed hydrogen fuel output pipeline includes one-level gas composition analysis processor 41, one-level mixed hydrogen fuel flowmeter 42, one-level mixed hydrogen fuel pressure transmitter 43, one-level mixed hydrogen fuel thermometer 44, one-level mixed hydrogen fuel pressure regulating valve 45, one-level mixed hydrogen fuel check valve 46, one-level outlet filter 47, one-level outlet pressure transmitter 48 and one-level outlet cut-off valve 49 in proper order.

The primary gas component analysis processor 41 is electrically connected to both the fuel gas control valve 17 and the primary hydrogen gas control valve 271.

The primary hydrogen-mixed fuel post-processing unit 4 further comprises a primary hydrogen-mixed fuel safety diffusion module 410, and an inlet of the primary hydrogen-mixed fuel safety diffusion module 410 is connected to a primary hydrogen-mixed fuel output pipeline.

The entry setting of branch's pipeline on the one-level fuel output pipeline of mixing hydrogen is between one-level fuel check valve 46 of mixing hydrogen and one-level export filter 47, be equipped with branch's pipeline export trip valve 411 on the branch pipeline.

The secondary hydrogen-mixed fuel post-processing unit 6 comprises a secondary hydrogen-mixed fuel output pipeline and components arranged on the secondary hydrogen-mixed fuel output pipeline.

The components on the secondary hydrogen mixing fuel output pipeline sequentially comprise a secondary gas component analysis processor 61, a secondary hydrogen mixing fuel flow meter 62, a secondary hydrogen mixing fuel pressure transmitter 63, a secondary hydrogen mixing fuel thermometer 64, a secondary hydrogen mixing fuel pressure regulating valve 65, a secondary hydrogen mixing fuel check valve 66, a secondary outlet filter 67, a secondary outlet pressure transmitter 68 and a secondary outlet cut-off valve 69.

The secondary gas component analysis processor 61 is electrically connected to a secondary hydrogen control valve 272.

The secondary hydrogen-mixed fuel post-processing unit 6 further comprises a secondary hydrogen-mixed fuel safety diffusion module 610, and an inlet of the secondary hydrogen-mixed fuel safety diffusion module 610 is connected to a secondary hydrogen-mixed fuel output pipeline.

Example 2:

the embodiment provides a hydrogen-mixed fuel generating device, which comprises a fuel gas pretreatment unit 1, a hydrogen gas pretreatment unit 2, a hydrogen-mixed fuel generating unit and a hydrogen-mixed fuel post-treatment unit;

the structures of the fuel gas pretreatment unit 1, the hydrogen gas pretreatment unit 2 and the hydrogen-mixed fuel post-treatment unit are the same as those of the embodiment 1, and the differences are that: the diameter of the inlet end of the mixing chamber 321 of the first-stage hydrogen-mixed fuel generator 32 in the hydrogen-mixed fuel generating unit is 2.5 times of the diameter of the outlet end, and the length of the mixing chamber 321 is 2 times of the diameter of the outlet end of the mixing chamber 321; the diameter of the rectifying chamber 322 of the primary hydrogen-mixed fuel generator 32 is the same as that of the outlet end of the mixing chamber 321, and the length of the rectifying chamber 322 of the primary hydrogen-mixed fuel generator 32 is 1 time of the diameter of the rectifying chamber 322; the divergence angle of the diffusion chamber 323 of the primary hydrogen-mixed fuel generator 32 is 5 degrees, the diameter of the inlet end of the diffusion chamber 323 is the same as that of the rectification chamber 322, and the length of the diffusion chamber 323 is 3.5 times of the diameter of the inlet end of the diffusion chamber 323.

The secondary hydrogen-mixed fuel generator 52 has the same structure as the primary hydrogen-mixed fuel generator 32.

Example 3:

the embodiment provides a hydrogen-mixed fuel generating device, which comprises a fuel gas pretreatment unit 1, a hydrogen gas pretreatment unit 2, a hydrogen-mixed fuel generating unit and a hydrogen-mixed fuel post-treatment unit;

the structures of the fuel gas pretreatment unit 1, the hydrogen gas pretreatment unit 2 and the hydrogen-mixed fuel post-treatment unit are the same as those of the embodiment 1, and the differences are that: the diameter of the inlet end of the mixing chamber 321 of the first-stage hydrogen-mixed fuel generator 32 in the hydrogen-mixed fuel generating unit is 2.2 times of the diameter of the outlet end, and the length of the mixing chamber 321 is 5 times of the diameter of the outlet end of the mixing chamber 321; the diameter of the rectifying chamber 322 of the primary hydrogen-mixed fuel generator 32 is the same as that of the outlet end of the mixing chamber 321, and the length of the rectifying chamber 322 of the primary hydrogen-mixed fuel generator 32 is 4 times of the diameter of the rectifying chamber 322; the divergence angle of the diffusion chamber 323 of the primary hydrogen-mixed fuel generator 32 is 7 degrees, the diameter of the inlet end of the diffusion chamber 323 is the same as that of the rectification chamber 322, and the length of the diffusion chamber 323 is 6 times of the diameter of the inlet end of the diffusion chamber 323.

In the secondary hydrogen-mixed fuel generator 52, the diameter of the inlet end of the mixing chamber is 2.4 times of the diameter of the outlet end, and the length of the mixing chamber is 4 times of the diameter of the outlet end of the mixing chamber; the diameter of the rectifying chamber of the secondary hydrogen-mixed fuel generator 52 is the same as that of the outlet end of the mixing chamber, and the length of the rectifying chamber of the secondary hydrogen-mixed fuel generator 52 is 3 times of the diameter of the rectifying chamber; the divergence angle of the diffusion chamber of the secondary hydrogen-mixed fuel generator 52 is 6 degrees, the diameter of the inlet end of the diffusion chamber is the same as that of the rectification chamber, and the length of the diffusion chamber is 4 times of the diameter of the inlet end of the diffusion chamber.

Example 4:

the present embodiment provides a hydrogen-mixed fuel generation device, the structure of which is as described in embodiment 1, except that: the hydrogen mixed fuel generating unit comprises three stages, namely a primary hydrogen mixed fuel generating unit 3, a secondary hydrogen mixed fuel generating unit 5 and a tertiary hydrogen mixed fuel generating unit, the pipeline of the hydrogen preprocessing unit 2 is divided into three branches which are respectively connected with the inlets of the primary hydrogen mixed fuel generating unit 3, the secondary hydrogen mixed fuel generating unit 5 and the tertiary hydrogen mixed fuel generating unit, and the outlets of the primary hydrogen mixed fuel generating unit 3, the secondary hydrogen mixed fuel generating unit 5 and the tertiary hydrogen mixed fuel generating unit are correspondingly connected with a primary hydrogen mixed fuel post-processing unit 4, a secondary hydrogen mixed fuel post-processing unit 6 and the tertiary hydrogen mixed fuel post-processing unit; the first-stage hydrogen-mixed fuel post-processing unit 4 is divided into a branch pipeline which is connected with an inlet of the second-stage hydrogen-mixed fuel generating unit 5, and the second-stage hydrogen-mixed fuel post-processing unit 6 is divided into a branch pipeline which is connected with an inlet of the third-stage hydrogen-mixed fuel generating unit.

The structure of the third-stage hydrogen-mixed fuel generation unit is the same as that of the first-stage hydrogen-mixed fuel generation unit 3, and components which are the same as those of the second-stage branch pipeline of the hydrogen input pipeline and those of the output pipeline of the second-stage hydrogen-mixed fuel post-processing unit 6 are correspondingly arranged on the third-stage branch pipeline of the hydrogen input pipeline and the output pipeline of the third-stage hydrogen-mixed fuel post-processing unit.

Example 5:

the embodiment provides a method for generating hydrogen-mixed fuel, which is carried out by adopting the device in the embodiment 1 and comprises the following steps:

(1) after the fuel gas and the hydrogen gas are independently pretreated, the fuel gas is natural gas, the pretreatment independently comprises the detection of the temperature, the pressure and the flow of the fuel gas and the hydrogen gas and the regulation of the pressure and the flow, the fuel gas is introduced into a primary hydrogen mixed fuel generating unit 3, the pressure before the fuel gas is introduced is 2.5MPa, the temperature is 20 ℃, the hydrogen gas is divided into two parts, one part of the two parts is injected into the primary hydrogen mixed fuel generating unit 3 to be mixed, rectified and diffused with the fuel gas, the pressure before the hydrogen gas is injected is 40MPa, the temperature is 20 ℃, the primary hydrogen mixed fuel is obtained through the aftertreatment, the aftertreatment comprises the component analysis of the primary hydrogen mixed fuel, the detection of the flow, the temperature and the pressure, the pressure regulation and the gas filtration, the speed of the primary hydrogen mixed fuel leaving the primary hydrogen mixed fuel generating unit 3 is 20m/s, and the pressure is 3MPa, the temperature is 20 ℃, and the volume fraction of hydrogen in the primary hydrogen mixed fuel is 50%;

(2) injecting the other part of hydrogen in the step (1) into a secondary hydrogen mixed fuel generation unit 5, wherein the pressure before the hydrogen injection is 40MPa and the temperature is 20 ℃, simultaneously introducing part of the primary hydrogen mixed fuel obtained in the step (1) into the secondary hydrogen mixed fuel to be mixed, rectified and expanded with the hydrogen, and then carrying out post-treatment to obtain the secondary hydrogen mixed fuel, wherein the post-treatment comprises the steps of component analysis of the secondary hydrogen mixed fuel, detection of flow, temperature and pressure, pressure regulation and gas filtration, the rate of the secondary hydrogen mixed fuel leaving the secondary hydrogen mixed fuel generation unit 5 is 20m/s, the pressure is 3MPa, the temperature is 20 ℃, and the volume fraction of the hydrogen in the secondary hydrogen mixed fuel is 75%.

In the embodiment, the method is adopted to prepare the hydrogen-mixed fuel, the mixing uniformity and the heat value stability of the fuel gas and the hydrogen are high, the fluctuation range of the wonderful white index of the hydrogen-mixed fuel can be controlled within +/-4% of the target value, the preparation efficiency is high, the hydrogen-mixed fuels with different hydrogen-containing concentrations can be obtained simultaneously, and the diversified requirements of users are met.

Example 6:

the embodiment provides a method for generating hydrogen-mixed fuel, which is carried out by adopting the device in the embodiment 2 and comprises the following steps:

(1) after fuel gas and hydrogen are independently pretreated, the fuel gas is synthetic gas, the pretreatment independently comprises the detection of the temperature, the pressure and the flow of the fuel gas and the hydrogen and the regulation of the pressure and the flow, the fuel gas is introduced into a primary hydrogen mixed fuel generating unit 3, the pressure before the fuel gas is introduced is 1.6MPa, the temperature is 50 ℃, the hydrogen is divided into two parts, one part of the two parts is injected into the primary hydrogen mixed fuel generating unit 3 to be mixed, rectified and diffused with the fuel gas, the pressure before the hydrogen is injected is 10MPa, the temperature is 50 ℃, the primary hydrogen mixed fuel is obtained through aftertreatment, the aftertreatment comprises the component analysis of the primary hydrogen mixed fuel, the detection of the flow, the temperature and the pressure, the pressure regulation and the gas filtration, the speed of the primary hydrogen mixed fuel leaving the primary hydrogen mixed fuel generating unit 3 is 30m/s, and the pressure is 2MPa, the temperature is 50 ℃, and the volume fraction of hydrogen in the primary hydrogen-mixed fuel is 25%;

(2) injecting the other part of hydrogen in the step (1) into a secondary hydrogen mixed fuel generation unit 5, wherein the pressure before the hydrogen injection is 10MPa and the temperature is 50 ℃, simultaneously introducing part of the primary hydrogen mixed fuel obtained in the step (1) into the secondary hydrogen mixed fuel to be mixed, rectified and expanded with the hydrogen, and then carrying out post-treatment to obtain the secondary hydrogen mixed fuel, wherein the post-treatment comprises the steps of component analysis of the secondary hydrogen mixed fuel, detection of flow, temperature and pressure, pressure regulation and gas filtration, the speed of the secondary hydrogen mixed fuel leaving the secondary hydrogen mixed fuel generation unit 5 is 30m/s, the pressure is 2MPa, the temperature is 50 ℃, and the volume fraction of the hydrogen in the secondary hydrogen mixed fuel is 40%.

In the embodiment, the method is adopted to prepare the hydrogen-mixed fuel, the mixing uniformity and the heat value stability of the fuel gas and the hydrogen are higher, the fluctuation range of the wonderful white index of the hydrogen-mixed fuel can be controlled within +/-5% of the target value, the preparation efficiency is high, the hydrogen-mixed fuels with different hydrogen-containing concentrations can be obtained simultaneously, and the diversified requirements of users are met.

Example 7:

the embodiment provides a method for generating hydrogen-mixed fuel, which is carried out by adopting the device in the embodiment 3 and comprises the following steps:

(1) after the fuel gas and the hydrogen gas are independently pretreated, the fuel gas is natural gas and coal gas, the pretreatment independently comprises the detection of the temperature, the pressure and the flow of the fuel gas and the hydrogen gas and the regulation of the pressure and the flow, the fuel gas is introduced into a primary hydrogen mixed fuel generating unit 3, the pressure before the fuel gas is introduced is 3.5MPa, the temperature is 10 ℃, the hydrogen gas is divided into two parts, one part of the two parts is injected into the primary hydrogen mixed fuel generating unit 3 to be mixed, rectified and expanded with the fuel gas, the pressure before the hydrogen gas is injected is 70MPa, the temperature is 10 ℃, the primary hydrogen mixed fuel is obtained through the post-treatment, the post-treatment comprises the component analysis of the primary hydrogen mixed fuel, the detection of the flow, the temperature and the pressure, the pressure regulation and the gas filtration, the speed of the primary hydrogen mixed fuel leaving the primary hydrogen mixed fuel generating unit 3 is 10m/s, and the pressure is 4MPa, the temperature is 10 ℃, and the volume fraction of hydrogen in the primary hydrogen-mixed fuel is 70%;

(2) injecting the other part of hydrogen in the step (1) into a secondary hydrogen mixed fuel generation unit 5, wherein the pressure before the hydrogen injection is 60MPa and the temperature is 10 ℃, simultaneously introducing part of the primary hydrogen mixed fuel obtained in the step (1) into the secondary hydrogen mixed fuel to be mixed, rectified and expanded with the hydrogen, and then carrying out post-treatment to obtain the secondary hydrogen mixed fuel, wherein the post-treatment comprises the steps of component analysis of the secondary hydrogen mixed fuel, detection of flow, temperature and pressure, pressure regulation and gas filtration, the rate of the secondary hydrogen mixed fuel leaving the secondary hydrogen mixed fuel generation unit 5 is 10m/s, the pressure is 4MPa, the temperature is 10 ℃, and the volume fraction of the hydrogen in the secondary hydrogen mixed fuel is 90%.

In the embodiment, the method for preparing the hydrogen-mixed fuel has the advantages that the mixing uniformity and the heat value stability of the fuel gas and the hydrogen gas are high, the fluctuation range of the wonderful white index of the hydrogen-mixed fuel can be controlled within +/-4.5% of the target value, the preparation efficiency is high, the hydrogen-mixed fuels with different hydrogen-containing concentrations can be obtained simultaneously, and the diversified requirements of users are met.

It can be seen from the above embodiments that, according to the device of the present invention, through mixing the fuel gas and the hydrogen gas in the hydrogen-mixed fuel generation unit, and through the structural design of the hydrogen-mixed fuel generation unit, the relatively low-pressure fuel gas is injected and mixed by using the high injection speed of the hydrogen gas, and then the hydrogen gas and the fuel gas are mixed, rectified and pressure restored, so as to reduce the external energy consumption in the fuel mixing process, solve the problem of gas stratification when the traditional fuel gas and the hydrogen gas are mixed, create the generation mode of the hydrogen-mixed fuel, improve the mixing uniformity and the heat value stability of the two, facilitate to improve the preparation efficiency of the hydrogen-mixed fuel, and reduce the preparation cost; the device can rapidly obtain the mixed hydrogen fuel with different mixing proportions through the arrangement of the multi-stage mixed hydrogen fuel generating unit, meets the requirements of users on different hydrogen-containing concentrations of the mixed hydrogen fuel, increases the flexibility of the configuration of the mixed hydrogen fuel, and widens the application range of the preparation scheme of the mixed hydrogen fuel.

The applicant states that the present invention is illustrated by the detailed apparatus and method of the present invention through the above embodiments, but the present invention is not limited to the above detailed apparatus and method, i.e. it is not meant to imply that the present invention must be implemented by the above detailed apparatus and method. It will be apparent to those skilled in the art that any modifications to the present invention, equivalents of the means for substitution and addition of means for carrying out the invention, selection of specific means, etc., are within the scope and disclosure of the invention.