阅读说明：本技术 一种氨混配燃烧系统及采用氨混配燃烧系统的二氧化碳减排方法 (Ammonia mixing combustion system and carbon dioxide emission reduction method adopting same ) 是由 杨豫森 崔华 徐波 谭智 陈辉 于 2018-11-27 设计创作，主要内容包括：本发明涉及一种氨混配燃烧系统及方法及二氧化碳减排方法,所述氨混配燃烧系统包括：燃烧室、燃料输送系统燃料输送系统和燃烧室相互连通,氨混配燃烧系统还包括氨混配燃烧控制模块及控制阀和氨储存设备,燃料输送系统向燃烧室输送的燃料包括氨源燃料；氨储存设备,储存氨气、液氨或氨水中的任意一种；氨混配燃烧控制模块向控制阀传送信号,以控制氨储存设备中一定温度、压力的氨经氨供给管路输送到氨混配燃烧器。本发明能够实现低成本的对现有化石能源的锅炉、燃气轮机、燃气锅炉、燃油燃气汽车发动机的改造,将现有燃烧器或内燃机的结构或燃料供给模块进行改造,在低成本改造的基础上,就可以实现上述燃烧设备的部分燃料的去碳化改造。(The invention relates to an ammonia mixed combustion system and method and a carbon dioxide emission reduction method, wherein the ammonia mixed combustion system comprises: the ammonia mixed combustion system also comprises an ammonia mixed combustion control module, a control valve and ammonia storage equipment, and the fuel conveyed to the combustion chamber by the fuel conveying system comprises ammonia source fuel; an ammonia storage device for storing any one of ammonia gas, liquid ammonia or ammonia water; the ammonia mixed combustion control module transmits signals to the control valve so as to control ammonia with certain temperature and pressure in the ammonia storage equipment to be delivered to the ammonia mixed combustor through the ammonia supply pipeline. The invention can realize the low-cost reformation of the existing fossil energy boiler, gas turbine, gas boiler and oil-gas automobile engine, reforms the structure of the existing combustor or internal combustion engine or a fuel supply module, and can realize the decarbonization reformation of partial fuel of the combustion equipment on the basis of low-cost reformation.)

1. An ammonia blended combustion system comprising: the ammonia mixed combustion system is characterized by further comprising an ammonia mixed combustion control module, a control valve and ammonia storage equipment, wherein the fuel conveyed to the combustion chamber by the fuel conveying system comprises ammonia source fuel;

an ammonia storage device for storing any one of ammonia gas, liquid ammonia or ammonia water;

the ammonia mixed combustion control module transmits signals to the control valve so as to control ammonia with certain temperature and pressure in the ammonia storage equipment to be delivered to the ammonia mixed combustor through the ammonia supply pipeline.

2. The ammonia blended combustion system of claim 1, wherein the fuel delivery system comprises a first fuel delivery subsystem and a second fuel delivery subsystem, the fuel delivered by the first fuel delivery subsystem is at least one of a main fuel or a combustion-supporting fuel, and the fuel delivered by the second fuel delivery subsystem is an ammonia source fuel.

3. The ammonia blended combustion system of claim 2, further comprising a fuel blending system, wherein the first and second fuel delivery subsystems extend into the fuel blending system and are in communication with the combustion chamber through the fuel blending system.

4. The ammonia compounding combustion system of claim 2, further comprising an ammonia storage device, the ammonia source fuel storage device in communication with the second fuel delivery subsystem.

5. The ammonia compounding combustion system of claim 2, further comprising a pure oxygen delivery system, said pure oxygen delivery system and said combustion chamber being in communication with each other.

6. The ammonia blended combustion system of claim 2, further comprising an ammonia source fuel controller in electrical or communicative connection with the valve of the second fuel delivery subsystem.

7. The ammonia blended combustion system of claim 6, further comprising an ammonia detector disposed in the second fuel delivery subsystem that detects concentration, pressure and flow of the ammonia source fuel and feeds back the detection to the ammonia source fuel controller.

8. An ammonia blended combustion system according to any one of claims 2 to 7, wherein the main fuel or combustion-supporting fuel comprises at least one of pulverized coal, natural gas, methane gas, coal gas, hydrogen gas, gasoline, diesel.

9. An ammonia mixing combustion method is characterized by comprising the following steps:

step 1: selecting an ammonia storage facility and a type of ammonia supply;

step 2: selecting the type of ammonia mixing burner;

and step 3: judging whether the fuel supply pipeline and the ignition module meet working conditions, and if not, adjusting the fuel supply pipeline and the ignition module to enable the fuel supply pipeline and the ignition module to have the working conditions;

and 4, step 4: if the working condition is met, the ignition control signal is received, the fuel supply pipeline supplies fuel, and the ignition module executes the ignition operation;

and 5: according to the combustion load requirement, the ammonia mixed combustion system control module is used for controlling the fuel supply amount and the mixing proportion of ammonia and other fuels, so that the combustion load requirement is met.

10. The method for realizing carbon dioxide emission reduction of the ammonia mixed combustion system is characterized in that the ammonia mixed combustion system replaces fossil fuel with ammonia fuel to realize carbon dioxide emission reduction, and the emission reduction amount calculation formula is as follows:

F_C02＝F_fossil*X＝(F_Ammonia*Q_Ammonia/Q_Fossil)*X；

In the formula, F_CO2The carbon dioxide emission is reduced, kgCO 2/h;

F_ammoniaThe flow is the pure ammonia fuel input flow, kg/h;

Q_ammoniaThe fuel is pure ammonia fuel unit heating value, kJ/kg;

Q_fossilkJ/kg of unit heating value of the original fossil fuel;

F_fossilThe amount of fossil fuel to be replaced is kg/h;

x is a calculation factor of carbon emission per unit mass of the fossil fuel, kgCO 2/kg;

the above formula assumes that the combustion calorific value of ammonia fuel is equal to the combustion calorific value of alternative fossil fuel, i.e., F_Ammonia*Q_Ammonia＝F_Fossil*Q_Fossil；

The fossil fuel to be replaced comprises at least one of pulverized coal, natural gas, methane gas, coal gas, gasoline and diesel oil.

Technical Field

The invention relates to the field of industrial burners, in particular to an ammonia mixed combustion system and a carbon dioxide emission reduction method adopting the ammonia mixed combustion system.

Background

In order to cope with global climate warming and climate change, a coal-fired power plant needs to maintain annual power generation load by purchasing a green certificate or a carbon index in the future, or needs to perform fuel flexibility transformation to become a thermal power plant with low carbon emission intensity.

Coal-fired thermal power plants are carbon-emitting households, other industries with large emission amount, high energy consumption and high coal-fired strength such as steel-making, metallurgy and cement, and other industries of fuel gas or fuel oil, and as long as the carbon content in the fuel is high, a large amount of carbon dioxide can be emitted, thus causing adverse effects on the environment.

The existing gas-oil automobile engine or the internal combustion generator of the medium-small power station mainly uses carbon-containing fuel, and the emissions such as sulfide and the like released after the combustion of the carbon-containing fuel also pollute the environment.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an ammonia mixed combustion system. The invention applies ammonia fuel with zero carbon emission to a pulverized coal boiler of a power station, improves the structure of the existing large-scale pulverized coal burner of a thermal power station, and flexibly combines ammonia and various fuels for combustion by adding a supply system of ammonia, oxygen and hydrogen/oil fuel gas on the basis of primary air and secondary air of the traditional pulverized coal burner, thereby realizing low-cost reformation of the existing pulverized coal boiler. In addition, the invention uses the cyclone burner to burn the mixed fuel based on ammonia, thereby improving the combustion efficiency, saving energy and reducing environmental pollution. The operation realizes real fuel flexibility, namely, the boiler can adopt different fuels to carry out combustion power generation according to the supply and price conditions of the fuels at different time intervals. The pulverized coal fired boiler of the traditional thermal power plant has the possibility of burning other fuels, reduces the carbon emission intensity of the thermal power unit, and ensures that the power plant can avoid the huge expenditure of collecting carbon emission tax or additionally purchasing carbon quota in the future; thereby making the power plant profitable in the competition of the power market at the future carbon tax and green certificate enforcement stage. The introduction of ammonia and pure oxygen can realize the low-load stable combustion of the boiler of the thermal power generating unit, thereby improving the load range of the low-load peak regulation of the boiler, increasing the peak regulation capability of the thermal power generating unit, and enabling the power plant to obtain the peak regulation subsidy by participating in the deep peak regulation of the power grid all the year round.

The invention is realized by the following technical scheme:

in a first aspect, the present invention provides an ammonia blended combustion system comprising: the ammonia mixed combustion system also comprises an ammonia mixed combustion control module, a control valve and ammonia storage equipment, wherein the fuel conveyed to the combustion chamber by the fuel conveying system comprises ammonia source fuel;

an ammonia storage device for storing any one of ammonia gas, liquid ammonia or ammonia water;

the ammonia mixed combustion control module transmits signals to the control valve so as to control ammonia with certain temperature and pressure in the ammonia storage equipment to be conveyed to the ammonia mixed combustor through the ammonia supply pipeline.

Further, the fuel delivery system of the ammonia blending combustion system comprises a first fuel delivery subsystem and a second fuel delivery subsystem, wherein the fuel delivered by the first fuel delivery subsystem is at least one of main fuel or combustion-supporting fuel, and the fuel delivered by the second fuel delivery subsystem is ammonia source fuel.

Further, the ammonia blending combustion system also comprises a fuel mixing system, and the first fuel delivery subsystem and the second fuel delivery subsystem extend into the fuel mixing system and are communicated with the combustion chamber through the fuel mixing system.

Further, the ammonia mixed combustion system also comprises an ammonia storage device, and the ammonia source fuel storage device is communicated with the second fuel delivery subsystem.

Further, the ammonia mixed combustion system further comprises a pure oxygen conveying system, and the pure oxygen conveying system is communicated with the combustion chamber.

Further, the ammonia blending combustion system further comprises an ammonia source fuel controller, and the ammonia source fuel controller is electrically connected or in communication connection with the valve of the second fuel delivery subsystem.

Further, the ammonia blending combustion system further comprises an ammonia detector, wherein the ammonia detector is arranged in the second fuel delivery subsystem, detects the concentration, the pressure and the flow of the ammonia source fuel, and feeds back the detection result to the ammonia source fuel controller.

Further, the main fuel or combustion-supporting fuel of the ammonia mixed combustion system comprises at least one of pulverized coal, natural gas, methane gas, coal gas, hydrogen, gasoline and diesel.

An ammonia mixed combustion method comprises the following steps:

step 1: selecting an ammonia storage facility and a type of ammonia supply;

step 2: selecting the type of ammonia mixing burner;

and step 3: judging whether the fuel supply pipeline and the ignition module meet working conditions, and if not, adjusting the fuel supply pipeline and the ignition module to enable the fuel supply pipeline and the ignition module to have the working conditions;

and 4, step 4: if the working condition is met, the ignition control signal is received, the fuel supply pipeline supplies fuel, and the ignition module executes the ignition operation;

and 5: according to the combustion load requirement, the ammonia mixed combustion system control module is used for controlling the fuel supply amount and the mixing proportion of ammonia and other fuels, so that the combustion load requirement is met.

A method for realizing carbon dioxide emission reduction of an ammonia mixed combustion system is characterized in that the ammonia mixed combustion system utilizes ammonia fuel to replace fossil fuel to realize carbon dioxide emission reduction, and the emission reduction amount calculation formula is as follows:

F_CO2＝F_fossil*X＝(F_Ammonia*Q_Ammonia/Q_Fossil)*X；

In the formula, F_CO2The carbon dioxide emission is reduced, kgCO 2/h;

F_ammoniaThe flow is the pure ammonia fuel input flow, kg/h;

Q_ammoniaThe fuel is pure ammonia fuel unit heating value, kJ/kg;

Q_fossilkJ/kg of unit heating value of the original fossil fuel;

F_fossilThe amount of fossil fuel to be replaced is kg/h;

x is a calculation factor of carbon emission per unit mass of the fossil fuel, kgCO 2/kg;

the above formula assumes that the combustion calorific value of ammonia fuel is equal to the combustion calorific value of alternative fossil fuel, i.e., F_Ammonia*Q_Ammonia＝F_Fossil*Q_Fossil；

The fossil fuel to be replaced comprises at least one of pulverized coal, natural gas, methane gas, coal gas, gasoline and diesel oil.

In a second aspect, the present invention provides an ammonia blended combustion system comprising: the fuel mixing system is connected with the combustion furnace, the fuel conveying system comprises a first fuel conveying subsystem and a second fuel conveying subsystem, the first fuel conveying subsystem conveys fuel to the fuel mixing system and is at least one of main fuel or combustion-supporting fuel, and the second fuel conveying subsystem conveys ammonia source fuel to the fuel mixing system.

Further, the ammonia mixed combustion system further comprises an ammonia source fuel storage device, and the first end of the ammonia source fuel storage device is communicated with the second fuel delivery subsystem.

Further, the second end of the ammonia source fuel storage device extends into the combustion hearth through a secondary ammonia filling port.

Furthermore, a first opening and a secondary ammonia filling opening are formed in the side wall of the combustion hearth, the fuel mixing system is communicated with the combustion hearth through the first opening, and the first opening and the secondary ammonia filling opening are perpendicular to each other.

Further, the number of the secondary ammonia filling ports is several.

Further, an igniter is arranged at the joint of the fuel mixing system and the combustion hearth.

Further, the ammonia mixed combustion system also comprises a secondary air introducing pipeline, and the secondary air introducing pipeline is communicated with the combustion hearth.

Further, the first fuel delivery subsystem and the second fuel delivery subsystem are respectively provided with a first fuel control valve and a second fuel control valve.

Further, the ammonia mixed combustion system further comprises a control module, and the control module is in communication connection or electrical connection with the first fuel control valve and/or the second fuel control valve respectively.

Further, the main fuel or the combustion-supporting fuel comprises at least one of pulverized coal, natural gas, methane gas, coal gas, hydrogen, gasoline and diesel oil, and the ammonia source fuel is at least one of ammonia gas, liquid ammonia and ammonia water.

In a third aspect, the present invention provides an ammonia mixed pulverized coal fired boiler combustion system, comprising: the ammonia storage device is used for storing any one of ammonia gas, liquid ammonia or ammonia water, is connected with the ammonia mixing combustor and supplies ammonia to the ammonia mixing combustor; the ammonia mixing combustor comprises one or more fuel outlets, and is used for conveying one or more fuels and ammonia into a boiler furnace connected with the ammonia mixing combustor for combustion after the one or more fuels and the ammonia are mixed; and the ammonia mixed combustion system controller receives data of the ammonia, the primary air and the secondary air detector to control the ammonia, the primary air and the secondary air input to the ammonia mixed combustor.

Further, the system comprises a pure oxygen supply device which is connected with the ammonia mixing combustor and is used for supplying pure oxygen to the ammonia mixing combustor.

Further, the system includes a pure oxygen detector that detects the flow, pressure and temperature of the pure oxygen supplied to the ammonia blended combustion burner and feeds back to the ammonia blended combustion system controller.

Further, an ammonia and pure oxygen premixing chamber is arranged in the ammonia mixing combustor, and the ammonia and the pure oxygen are fully mixed in the ammonia and pure oxygen premixing chamber and then are conveyed to a boiler furnace.

Further, the system comprises a primary ammonia supply pipeline, a primary ammonia control valve and a primary ammonia detector, wherein the primary ammonia detector detects the flow, pressure and temperature of ammonia in the primary ammonia supply pipeline and feeds the flow, pressure and temperature back to the ammonia mixing and combusting system controller, and the primary ammonia control valve is controlled to supply ammonia to the ammonia mixing and combusting system controller according to detected data.

Further, the system is provided with a secondary ammonia supply pipeline, a secondary ammonia control valve and a secondary ammonia detector, wherein the secondary ammonia detector detects the flow, pressure and temperature of ammonia in the secondary ammonia supply pipeline, feeds the flow, pressure and temperature back to the ammonia blending combustion system controller, and controls the secondary ammonia control valve to supply ammonia to the boiler furnace according to detected data.

Further, the amount of ammonia supplied by the secondary ammonia supply pipeline and the distance between the secondary ammonia filling port and the flame of the hearth are adjusted by detecting the emission amount of nitrogen oxides in the boiler exhaust gas.

Further, the main fuel supplied to the ammonia mixed burner is pulverized coal carried by primary air and ammonia supplied to a primary ammonia supply pipeline.

Further, the combustion-supporting fuel supplied by the ammonia mixing combustor comprises one or more of natural gas, methane gas, coal gas, hydrogen gas, gasoline and diesel oil.

Further, the system comprises a primary air supply device and a secondary air supply device which respectively convey pulverized coal and pure air to the system,

the primary air detector detects the pressure, temperature and pulverized coal concentration of primary air and feeds the primary air back to the ammonia blending combustion system controller so as to adjust the primary air quantity input into a boiler hearth;

the secondary air detector detects the pressure, temperature and air quantity of the secondary air and feeds the secondary air back to the ammonia blending combustion system controller so as to adjust the secondary air quantity input into the boiler hearth.

In a fourth aspect, the invention provides an ammonia mixed pulverized coal boiler combustion system, which comprises a primary air supply device, a secondary air supply device and a combustion-supporting fuel system; the primary air supply device, the secondary air supply device and the combustion-supporting fuel system are respectively connected with a boiler furnace; an ammonia delivery system; the ammonia mixing combustor is connected with a boiler furnace; the ammonia stored in the ammonia storage device can be one of ammonia gas, liquid ammonia or ammonia water, and is connected with the ammonia mixing burner to supply ammonia to the ammonia mixing burner; the ammonia compounding combustion system controller receives data from the ammonia detector to control the amount of ammonia input to the ammonia compounding combustor.

Further, the ammonia delivery system includes an ammonia supply line, an ammonia control valve, and an ammonia supply gun.

Further, the ammonia detector detects the concentration, pressure and flow of ammonia in the ammonia supply pipeline, feeds the ammonia to the ammonia mixed combustion system controller, and controls the ammonia control valve to supply ammonia to the ammonia mixed combustion system according to the detected data.

The ammonia mixed pulverized coal boiler combustion system comprises a primary air supply device for conveying pulverized coal to the system;

the primary air detector detects the pressure, temperature and coal powder concentration of primary air and feeds the primary air to the ammonia mixing combustion system controller so as to adjust the primary air quantity and coal powder quantity input into the boiler hearth.

The ammonia mixed pulverized coal boiler combustion system comprises a secondary air supply device which is used for conveying pure clean air to the system;

the secondary air detector detects the pressure, temperature and air quantity of the secondary air and feeds the secondary air back to the ammonia blending combustion system controller so as to adjust the secondary air quantity input into the boiler hearth.

The combustion-supporting fuel system comprises a hydrogen or oil or gas supply gun and a combustion-supporting fuel control valve;

further, a combustion-supporting fuel detector detects the temperature, pressure and concentration of the combustion-supporting fuel supplied to the ammonia blending burner.

Wherein, the combustion-supporting fuel comprises one or more of natural gas, methane gas, coal gas, hydrogen, gasoline and diesel oil.

Further, the ammonia mixed pulverized coal boiler combustion system comprises a pure oxygen detector which detects the concentration, pressure and flow of oxygen supplied to the ammonia mixed burner and feeds the detected oxygen back to the ammonia mixed combustion system controller.

Further, the ammonia mixed pulverized coal boiler combustion system comprises a coal detector which detects the concentration of pulverized coal supplied to the ammonia mixed burner and feeds the concentration back to the ammonia mixed combustion system controller.

In a fifth aspect, the present invention provides an ammonia mixed cyclone combustion system, comprising: the ammonia fuel combustion device comprises a primary air flow channel, a secondary air flow channel, an ammonia fuel conveying system, a cyclone wind wheel and a combustion hearth, wherein the primary air flow channel, the secondary air flow channel and the ammonia fuel conveying system are respectively communicated with the combustion hearth, and the cyclone wind wheel is arranged in the primary air flow channel and/or the secondary air flow channel.

The combustion-supporting fuel conveying system is communicated with the combustion furnace chamber, and the fuel conveyed to the combustion furnace chamber by the combustion-supporting fuel conveying system is at least one of natural gas, methane gas, biomass gas, coal gas, hydrogen, gasoline and diesel.

Further, the substance delivered to the combustion chamber by the ammonia fuel delivery system or the combustion-supporting fuel delivery system or the secondary air flow channel further comprises oxygen.

Further, the ammonia fuel delivery system comprises an ammonia source fuel supply pipeline and an ammonia source fuel gun, and an ammonia source fuel control valve is arranged between the ammonia source fuel supply pipeline and the ammonia source fuel gun.

Furthermore, the combustion-supporting fuel conveying system comprises a combustion-supporting fuel supply pipeline and a combustion-supporting fuel gun, and a combustion-supporting fuel control valve is arranged between the combustion-supporting fuel supply pipeline and the combustion-supporting fuel gun.

Furthermore, the lateral wall of the combustion hearth is provided with an opening, and the primary air flow passage, the secondary air flow passage, the ammonia fuel conveying system and the combustion-supporting fuel conveying system are vertically communicated with the combustion hearth through the opening.

Furthermore, the primary air flow channel, the secondary air flow channel, the ammonia fuel conveying system and the combustion-supporting fuel conveying system are coaxially arranged, the diameters of pipelines are sequentially increased, and the primary air flow channel, the ammonia fuel conveying system and the combustion-supporting fuel conveying system extend into the secondary air flow channel and penetrate through the center of the rotational flow wind wheel.

The device further comprises a secondary ammonia supply pipeline, a secondary ammonia control valve and a secondary ammonia filling port, wherein two ends of the secondary ammonia filling port are respectively communicated with the secondary ammonia supply pipeline and the combustion hearth, and the secondary ammonia control valve is arranged between the secondary ammonia supply pipeline and the secondary ammonia filling port.

And the control module is in communication connection or electric connection with the ammonia fuel delivery system and/or combustion-supporting fuel delivery system and/or the secondary ammonia control valve respectively.

Further, the ammonia source fuel delivered to the combustion furnace by the ammonia fuel delivery system is at least one of ammonia gas, liquid ammonia and ammonia water.

The invention can realize the low-cost reformation of the existing fossil energy boiler, a gas turbine, a gas boiler and even an oil-gas automobile engine, reforms the structure of the existing combustor or an internal combustion engine or a fuel supply module, and can realize the decarbonization reformation of partial fuel of the combustion equipment on the basis of the low-cost reformation. Specifically, the invention has the following advantages:

1. the ammonia is used as hydrogen storage medium at normal temperature and normal pressure, so that a large amount of energy can be stored with low energy consumption.

2. The method is combined with hydrogen production by renewable energy sources or peak-shaving power of a thermal power plant, and the ammonia synthesis process can be economically realized by utilizing surplus power and the high-temperature and high-pressure environment of the thermal power plant.

3. The ammonia is used as the fuel with zero carbon emission, and the carbon emission intensity of the coal-fired, gas-fired and thermal power stations can be quickly reduced by using co-combustion.

4. The ammonia is used as blended combustion or pure ammonia fuel, and can reduce the carbon emission intensity of internal combustion engines, external combustion engines and automobile engines.

5. The ammonia is used as a blended combustion or pure ammonia fuel, and the emission of pollutants such as sulfide in fossil energy power stations, internal and external combustion engines and automobile engines can be reduced.

Description of the drawings:

in order to more clearly illustrate the technical solution of the present invention, the drawings of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic system diagram of example 1.

FIG. 2 is a schematic system diagram of example 2.

FIG. 3 is a schematic system diagram of example 3.

FIG. 4 is a schematic system diagram of example 4.

FIG. 5 is a first system diagram of embodiment 5.

FIG. 6 is a second system diagram of embodiment 5.

FIG. 7 is a schematic view of a first system according to embodiment 6.

FIG. 8 is a second system diagram of example 6.

FIG. 9 is a schematic view of a system according to example 9.

FIG. 10 is a schematic system diagram of example 10.

FIG. 11 is a schematic view of a system according to example 11.

FIG. 12 is a system diagram of an internal combustion engine in which ammonia is mixed with gas or fuel in an automobile according to embodiment 13.

FIG. 13 is a schematic view of an internal combustion engine generator with ammonia blended with gas or fuel according to example 14.

FIG. 14 shows the steps of example 15 in the ammonia mixed combustion process.

To further clarify the structure and connection between the various components of the present invention, the following reference numerals are given and described:

reference numerals used in embodiment 1 of the present invention:

combustion furnace-101, fuel delivery system-102, fuel mixing system-103, ammonia source fuel storage-104, igniter-105, secondary air intake line-106, flame-107, control module-108, first opening-1011, secondary ammonia fill-1012, furnace wall-1013, first fuel delivery subsystem-1021, second fuel delivery subsystem-1022, first fuel control valve-10211, second fuel control valve-10221.

Reference numerals used in figure 1 and examples 2-4 of the present invention:

an ammonia supply pipeline-201, an ammonia control valve-202, an ammonia supply gun-203, an oxygen supply control valve-204, a pure oxygen supply gun-205, a primary air flow channel-206, a secondary air inlet pipe-207, an ammonia and pure oxygen premixing chamber-208, a hydrogen or oil or gas supply gun-209, a combustion-supporting fuel control valve-2020, a large thermal power station boiler four-corner tangential firing area-2011, a primary ammonia supply pipeline-2012, a primary ammonia control valve-2013, a primary ammonia supply gun-2014, a secondary ammonia supply pipeline-2015, a secondary ammonia control valve-2016, an ammonia mixing burner-2017, an igniter-2018, a boiler furnace-2019, an ammonia mixing and combustion system controller-2020, an ammonia storage device-2021, a pure oxygen supply device-2022, a pure oxygen detector-2023, a pure oxygen supply gun-205, a combustion system controller-2018, a pure oxygen supply device-2021, Primary ammonia detector-2024, secondary ammonia detector-2025, fire coal detector-2026, and combustion-supporting fuel detector-2027.

Reference numerals used in fig. 5-6 and example 5 of the present invention:

an ammonia supply pipeline-501, an ammonia control valve-502, an ammonia supply gun-503, an oxygen supply control valve-504, a pure oxygen supply gun-505, a primary air runner-506, a secondary air inlet pipe-507, a hydrogen or oil or gas supply gun-508, a combustion-supporting fuel control valve-509, a large thermal power station boiler four-corner tangential circle combustion area-5010, an ammonia mixed burner-5011, a pure oxygen detector-5012, a combustion-supporting fuel detector-5013, a coal-fired detector-5014, an ammonia detector-5015, an igniter-5016, an ammonia mixed combustion system controller-5017, an ammonia storage device-5018 and a boiler hearth-5019.

Reference numerals used in fig. 7-11 and examples 6-11 of the present invention:

a primary air flow passage-601, a secondary air flow passage-602, a cyclone wind wheel-603, a combustion hearth-604, an ammonia fuel conveying system-605, a combustion-supporting fuel conveying system-606, a secondary ammonia supply pipeline-607, an electrolytic hydrogen production device-608 of a thermal power plant, a renewable energy electrolytic hydrogen production device-609, an opening-6041, an ammonia source fuel supply pipeline-6051, an ammonia source fuel gun-6052, an ammonia source fuel control valve-6053, a combustion-supporting fuel supply pipeline-6061, a combustion-supporting fuel gun-6062, a combustion-supporting fuel control valve-6063, a secondary ammonia supply pipeline-607, a secondary ammonia control valve-6071 and a secondary ammonia filling opening-6072.

Through the above description of the reference numerals, the technical solutions of the present invention can be more clearly understood and described in conjunction with the embodiments of the present invention.

Detailed Description

In order to make the technical means, objectives and functions of the present invention easy to understand, embodiments of the present invention will be described in detail with reference to the specific drawings.

It should be noted that all terms used in the present invention for directional and positional indication, such as: the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "lower", "lateral", "longitudinal", "center", and the like are used only for explaining the relative positional relationship, connection, and the like between the respective members in a certain state (as shown in the drawings), and are only for convenience of describing the present invention, but do not require that the present invention be necessarily constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, the descriptions related to "first", "second", etc. in the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicit to the numbers of the indicated technical features.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiment of the invention provides an ammonia mixing combustion system, which comprises: the fuel conveying system is communicated with the combustion hearth, and the fuel conveyed to the combustion hearth by the fuel conveying system comprises ammonia source fuel.

In some embodiments of the invention, the fuel delivery system includes a first fuel delivery subsystem that delivers at least one of a primary fuel or a combustion fuel and a second fuel delivery subsystem that delivers an ammonia source fuel. The ammonia source fuel is at least one of ammonia gas, liquid ammonia and ammonia water. The main fuel or the combustion-supporting fuel comprises at least one of pulverized coal, natural gas, methane gas, coal gas, hydrogen, gasoline and diesel.

In some embodiments of the present invention, the ammonia blended combustion system further comprises a fuel blending system, and the first fuel delivery subsystem and the second fuel delivery subsystem extend into the fuel blending system and are communicated with the combustion furnace chamber through the fuel blending system.

In some embodiments of the invention, the ammonia hybrid combustion system further comprises an ammonia storage device, and the ammonia source fuel storage device is in communication with the second fuel delivery subsystem.

In some embodiments of the present invention, the ammonia mixed combustion system further comprises a pure oxygen delivery system, and the pure oxygen delivery system and the combustion furnace are communicated with each other.

In some embodiments of the invention, the ammonia blended combustion system further comprises an ammonia source fuel controller that controls an electrical connection or communication with the valve of the second fuel delivery subsystem.

In some embodiments of the present invention, the ammonia blended combustion system further comprises an ammonia detector disposed in the second fuel delivery subsystem, detecting the concentration, pressure and flow rate of the ammonia source fuel, and feeding the detection result back to the ammonia source fuel controller.

The following will describe embodiments of the present invention in detail by way of specific examples.