阅读说明：本技术 一种基于不凝气体吸收及检测的综合地热利用系统 (Comprehensive geothermal utilization system based on absorption and detection of non-condensable gas ) 是由 骆超 于 2021-07-16 设计创作，主要内容包括：本发明提供一种基于不凝气体吸收及检测的综合地热利用系统,由检测系统、地热发电系统、不凝气体吸收回灌系统和冷却系统组成,所述检测系统由依次连接的热电偶组件、压力传感器组件和涡轮流量计组件组成,所述检测系统包括第一检测系统、第二检测系统和第三检测系统,本发明该技术发明可以有效地降低CO-(2)和H-(2)S的排放,减少温室效应,因此,具有极大的经济价值和社会价值。(The invention provides a comprehensive geothermal utilization system based on absorption and detection of non-condensable gas, which consists of a detection system, a geothermal power generation system, a non-condensable gas absorption recharging system and a cooling system, wherein the detection system consists of a thermocouple assembly, a pressure sensor assembly and a turbine flowmeter assembly which are sequentially connected, and comprises a first detection system, a second detection system and a third detection system 2 And H 2 The emission of S reduces the greenhouse effect, thereby having great economic value and social value.)

1. A comprehensive geothermal utilization system based on non-condensable gas absorption and detection is characterized in that: the system consists of a detection system, a geothermal power generation system, a non-condensable gas absorption and recharge system and a cooling system, wherein the detection system consists of a thermocouple component, a pressure sensor component and a turbine flowmeter component which are connected in sequence,

the detection system comprises a first detection system, a second detection system and a third detection system;

the first detection system is connected with the geothermal power generation system, the geothermal power generation system is connected with a gas compression device, the gas compression device is connected with the non-condensable gas absorption and recharge system through the second detection system, and the non-condensable gas absorption and recharge system is connected with a recharge well through the third detection system;

the geothermal power generation system and the non-condensable gas absorption and recharge system are connected with the cooling system.

2. The comprehensive geothermal utilization system based on non-condensable gas absorption and detection as claimed in claim 1, wherein: the geothermal power generation system comprises a pressure reducing valve, a first gas-liquid separator, a gas evaporator, a wet evaporator, a preheater, a second gas-liquid separator, a steam turbine and a power generator, wherein the pressure reducing valve is connected with the first gas-liquid separator, the first gas-liquid separator is respectively connected with the gas evaporator and the wet evaporator, the gas evaporator and the wet evaporator are connected with the steam turbine, the gas evaporator is connected with the second gas-liquid separator,

the pressure reducing valve is used for reducing the pressure of geothermal wet steam from a production well,

the first gas-liquid separator is used for separating geothermal wet steam, the separated geothermal gas enters the gas evaporator, the geothermal liquid enters the wet evaporator,

the gas evaporator is used for carrying out heat exchange on the separated geothermal gas and the liquid organic working medium from the preheater to heat the organic working medium, so that the organic working medium liquid is changed into superheated saturated steam, the geothermal gas after heat release enters the second gas-liquid separator, the geothermal gas is further subjected to gas-liquid separation, and the separated gas enters the first absorber after passing through the compressor;

the wet evaporator is used for carrying out heat exchange on geothermal liquid and the liquid organic working medium from the preheater to heat the organic working medium, so that the organic working medium liquid is changed into superheated saturated steam, and the geothermal liquid after heat release is mixed with the liquid from the second gas-liquid separator and then enters the preheater.

And the superheated saturated steam in the gas evaporator and the wet evaporator is mixed and then enters the steam turbine, and the steam turbine drives the generator to generate power.

3. The comprehensive geothermal utilization system based on non-condensable gas absorption and detection as claimed in claim 1, wherein: the cooling system comprises a condenser, one end of the condenser is connected with a working medium pump, the working medium pump is connected with the preheater, and the other end of the condenser is connected with a cooling pump and a cooling tower.

4. The comprehensive geothermal utilization system based on non-condensable gas absorption and detection as claimed in claim 2 or 3, wherein: the steam turbine is connected with the condenser.

5. The comprehensive geothermal utilization system based on non-condensable gas absorption and detection as claimed in claim 1, wherein: the non-condensable gas absorption recharging system comprises a compressor connected with the second gas-liquid separator, and a second detection system, a first absorber, a catalytic oxidizer, a second absorber, a scaling filter, a third detection system and a recharging well are sequentially connected with the compressor,

the compressor is used for pressurizing the geothermal gas separated by the second gas-liquid separator and then conveying the geothermal gas to the first absorber, the first absorber is used for absorbing Hg element in the geothermal gas, the gas without the Hg element enters the catalytic oxidizer, the catalytic oxidizer carries out catalytic reaction on the geothermal gas, and the gas is conveyed to the second absorber through a pipeline.

6. The comprehensive geothermal utilization system based on non-condensable gas absorption and detection as claimed in claim 1, wherein: the preheater is connected with the second absorber, geothermal liquid in the preheater exchanges heat with organic working medium liquid from the condenser, the geothermal liquid releases heat in the preheater, and the geothermal liquid after heat release enters the second absorber.

7. The comprehensive geothermal utilization system based on non-condensable gas absorption and detection as claimed in claim 1, wherein: the second absorber is connected with the cooling tower, the second absorber neutralizes alkaline elements contained in the geothermal liquid, the neutralized liquid enters the recharging well through the scaling filter, and the residual gas is sent to the cooling tower for cooling.

8. The comprehensive geothermal utilization system based on non-condensable gas absorption and detection as claimed in claim 1, wherein: the thermocouple, the pressure sensor and the flowmeter of the detection system are connected with a background server through leads, the detection system transmits data to the background server for reading and storing, and the background server judges the corrosivity and the corrosion rate of geothermal wet steam, gas and liquid to the ground according to the acquired temperature, pressure and flow measurement values so as to take corresponding measures to optimize the system and prevent damage to system devices.

Technical Field

The invention relates to the technical field of new energy development and utilization, in particular to a comprehensive geothermal utilization system based on non-condensable gas absorption and detection.

Background

Geothermal energy is mostly renewable heat energy from deep in the earth, resulting from the decay of the earth's molten magma and radioactive materials. Yet a small portion of the energy comes from the sun, accounting for approximately 5% of the total geothermal energy, and the majority of the surface geothermal energy comes from the sun. The circulation of the deep underground water and the invasion of magma from an extremely deep place into the crust bring heat from deep underground to near surface. The reserve is much larger than the total amount of energy utilized by people, and most of the reserve is concentrated and distributed in the structureThe plate has an edge, and the area is also a volcano and earthquake-prone area. Not only is it pollution-free clean energy, but also italian skin also used natural geothermal steam for the first time in 1904 in radrelo for electricity generation, if the rate of heat extraction did not exceed the rate of replenishment. Geothermal power generation is to inject water into a rock formation by hydraulic or explosive fragmentation to generate high-temperature steam, and then the steam is pumped out of the ground to push a turbine to rotate so as to enable a generator to generate electric energy. In the process, a part of the water vapor or waste gas which is not utilized is processed by the condenser and reduced into water to be sent back to the ground, and the circulation is repeated. The power generation capacity of the installation in 1990 reaches 6000MW, and the total amount of directly utilized geothermal resources is equivalent to 4.1Mt oil equivalent. Geothermal energy is a new clean energy, and under the condition that the environmental awareness of people is gradually enhanced and the energy is gradually lacking, the reasonable development and utilization of geothermal resources are more and more favored by people. Wherein the geothermal energy stored within 2000 meters from the ground surface is 2500 hundred million tons of standard coal. Nationwide geothermal energy is available in quantities of 68 billion cubic meters per year, containing 973 trillion kilojoules of geothermal energy. On the scale of geothermal utilization, China has been the first place in the world in recent years and steadily increases at a rate of nearly 10% per year. In the development of geothermal resources in China, through technical accumulation for many years, the geothermal power generation benefit is obviously improved. Besides geothermal power generation, utilization approaches such as building heating, greenhouse agriculture development, hot spring travel and the like by directly utilizing geothermal water are rapidly developed. The national development and utilization patterns of geothermal power generation represented by eight wells of tibetan sheep, geothermal heating represented by Tianjin and Xian, recuperation and tourism represented by the southeast coast, and planting and breeding represented by the North China plain have been formed basically. In various renewable energy applications, geothermal energy will likely become an important component of future energy. Compared with instability of solar energy and wind energy, geothermal energy is reliable renewable energy, and although the geothermal energy is developed and utilized at present, certain problems exist in the utilization process, such as CO existing in the geothermal gas₂And H₂S and other non-condensable gases exist in the environment due to the intensification of greenhouse effect caused by the emission of the amountCertain hazards, therefore, further improvements are desired.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a high-stability hinge adjusting seat structure which is strong in stability and convenient to adjust.

The technical scheme adopted by the invention for solving the problems is as follows:

the invention provides a comprehensive geothermal utilization system based on non-condensable gas absorption and detection, which consists of a detection system, a geothermal power generation system, a non-condensable gas absorption and recharge system and a cooling system, wherein the detection system consists of a thermocouple component, a pressure sensor component and a turbine flowmeter component which are connected in sequence,

the detection system comprises a first detection system, a second detection system and a third detection system;

the first detection system is connected with the geothermal power generation system, the geothermal power generation system is connected with a gas compression device, the gas compression device is connected with the non-condensable gas absorption and recharge system through the second detection system, and the non-condensable gas absorption and recharge system is connected with a recharge well through the third detection system;

the geothermal power generation system and the non-condensable gas absorption and recharge system are connected with the cooling system.

Further, the geothermal power generation system comprises a pressure reducing valve, a first gas-liquid separator, a gas evaporator, a wet evaporator, a preheater, a second gas-liquid separator, a steam turbine and a power generator, wherein the pressure reducing valve is connected with the first gas-liquid separator, the first gas-liquid separator is respectively connected with the gas evaporator and the wet evaporator, the gas evaporator and the wet evaporator are connected with the steam turbine, the gas evaporator is connected with the second gas-liquid separator,

the pressure reducing valve is used for reducing the pressure of geothermal wet steam from a production well,

the first gas-liquid separator is used for separating geothermal wet steam, the separated geothermal gas enters the gas evaporator, the geothermal liquid enters the wet evaporator,

the gas evaporator is used for carrying out heat exchange on the separated geothermal gas and the liquid organic working medium from the preheater to heat the organic working medium, so that the organic working medium liquid is changed into superheated saturated steam, the geothermal gas after heat release enters the second gas-liquid separator, the geothermal gas is further subjected to gas-liquid separation, and the separated gas enters the first absorber after passing through the compressor;

the wet evaporator is used for carrying out heat exchange on geothermal liquid and the liquid organic working medium from the preheater to heat the organic working medium, so that the organic working medium liquid is changed into superheated saturated steam, and the geothermal liquid after heat release is mixed with the liquid from the second gas-liquid separator and then enters the preheater.

And the superheated saturated steam in the gas evaporator and the wet evaporator is mixed and then enters the steam turbine, and the steam turbine drives the generator to generate power.

Furthermore, the cooling system comprises a condenser, one end of the condenser is connected with a working medium pump, the working medium pump is connected with the preheater, and the other end of the condenser is connected with a cooling pump and a cooling tower.

Further, the steam turbine is connected with the condenser.

Further, the non-condensable gas absorption and recharge system comprises a compressor connected with the second gas-liquid separator, a second detection system, a first absorber, a catalytic oxidizer, a second absorber, a scaling filter, a third detection system and a recharge well are sequentially connected with the compressor,

the compressor is used for pressurizing the geothermal gas separated by the second gas-liquid separator and then conveying the geothermal gas to the first absorber, the first absorber is used for absorbing Hg element in the geothermal gas, the gas without the Hg element enters the catalytic oxidizer, the catalytic oxidizer carries out catalytic reaction on the geothermal gas, and the gas is conveyed to the second absorber through a pipeline.

Further, the preheater is connected with the second absorber, geothermal liquid in the preheater exchanges heat with the organic working medium liquid from the condenser, the geothermal liquid releases heat in the preheater, and the geothermal liquid after releasing heat enters the second absorber.

Further, the second absorber is connected with the cooling tower, the second absorber neutralizes alkaline elements contained in the geothermal liquid, the neutralized liquid enters the recharging well through the scaling filter, and the rest gas is sent to the cooling tower for cooling.

Furthermore, a thermocouple, a pressure sensor and a flowmeter of the detection system are connected with a background server through leads, the detection system transmits data to the background server for reading and storing, and the background server judges the corrosivity and the corrosion rate of geothermal wet steam, gas and liquid to the ground according to the acquired temperature, pressure and flow measurement values so as to take corresponding measures to optimize the system and prevent damage to system devices.

The invention has the beneficial effects that:

the invention provides a comprehensive geothermal utilization system based on non-condensable gas absorption and testing, which mainly comprises a geothermal power generation system, a non-condensable gas absorption recharging system and a detection device, wherein the geothermal power generation system respectively adopts gas and a wet evaporator, so that geothermal wet steam is separated and then an organic working medium is heated to push a steam turbine to generate electricity; the gas absorption and recharge device adopts a chemical adsorption method and a catalytic oxidation method to ensure that the non-condensable gas in the geothermal wet steam is respectively absorbed and oxidized and then neutralized by the geothermal tail water to reduce CO₂And H₂S and other non-condensable gases are discharged, and the greenhouse effect is reduced; the detection device can effectively measure the temperature, pressure, flow and other parameters of the inlet of the absorber at the outlet of the production well and the inlet of the recharging well, and is based on CO₂And H₂The S saturation curve chart is combined with the temperature and the pressure of the tested geothermal fluid to judge whether the components such as equipment, pipelines and the like of the geothermal utilization system are in the allowable range of acid corrosion or not, so that the geothermal utilization system is optimized₂And H₂The emission of S reduces the greenhouse effect, thereby having great economic value and social value.

Drawings

FIG. 1 is a system block diagram of an integrated geothermal energy utilization system based on non-condensable gas absorption and detection in accordance with the present invention;

FIG. 2 shows CO of the comprehensive geothermal utilization system based on non-condensable gas absorption and detection₂Solubility saturation profile in water;

FIG. 3 is a schematic diagram of the H-shaped integrated geothermal energy utilization system based on the absorption and detection of the non-condensable gas₂S solubility in water saturation profile.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are for reference and illustrative purposes only and are not intended to limit the scope of the invention.

As shown in FIG. 1, the invention provides a comprehensive geothermal utilization system based on absorption and detection of non-condensable gas, which comprises a detection system, a geothermal power generation system, a non-condensable gas absorption and recharge system and a cooling system, wherein the detection system comprises a thermocouple assembly, a pressure sensor assembly and a turbine flowmeter assembly which are connected in sequence,

the detection system comprises a first detection system, a second detection system and a third detection system;

the first detection system is connected with the geothermal power generation system, the geothermal power generation system is connected with a gas compression device, the gas compression device is connected with the non-condensable gas absorption and recharge system through the second detection system, and the non-condensable gas absorption and recharge system is connected with a recharge well through the third detection system;

the geothermal power generation system and the non-condensable gas absorption and recharge system are connected with the cooling system.

In this embodiment, the geothermal power generation system includes a pressure reducing valve, a first gas-liquid separator, a gas evaporator, a wet evaporator, a preheater, a second gas-liquid separator, a steam turbine, and a generator, the pressure reducing valve is connected to the first gas-liquid separator, the first gas-liquid separator is connected to the gas evaporator and the wet evaporator, respectively, the gas evaporator and the wet evaporator are connected to the steam turbine, the gas evaporator is connected to the second gas-liquid separator,

the pressure reducing valve is used for reducing the pressure of geothermal wet steam from a production well,

the first gas-liquid separator is used for separating geothermal wet steam, the separated geothermal gas enters the gas evaporator, the geothermal liquid enters the wet evaporator,

the gas evaporator is used for carrying out heat exchange on the separated geothermal gas and the liquid organic working medium from the preheater to heat the organic working medium, so that the organic working medium liquid is changed into superheated saturated steam, the geothermal gas after heat release enters the second gas-liquid separator, the geothermal gas is further subjected to gas-liquid separation, and the separated gas enters the first absorber after passing through the compressor;

the wet evaporator is used for carrying out heat exchange on geothermal liquid and the liquid organic working medium from the preheater to heat the organic working medium, so that the organic working medium liquid is changed into superheated saturated steam, and the geothermal liquid after heat release is mixed with the liquid from the second gas-liquid separator and then enters the preheater.

And the superheated saturated steam in the gas evaporator and the wet evaporator is mixed and then enters the steam turbine, and the steam turbine drives the generator to generate power.

In this embodiment, the cooling system includes the condenser, condenser one end is connected with the working medium pump, the working medium pump is connected the pre-heater, the other end of condenser is connected with cooling pump and cooling tower.

In this embodiment, the steam turbine is connected to the condenser.

In this embodiment, the non-condensable gas absorption and recharge system comprises a compressor connected with the second gas-liquid separator, and a second detection system, a first absorber, a catalytic oxidizer, a second absorber, a scaling filter, a third detection system and a recharge well are sequentially connected with the compressor,

the compressor is used for pressurizing the geothermal gas separated by the second gas-liquid separator and then conveying the geothermal gas to the first absorber, and the first absorber is used for absorbing Hg in the geothermal gasThe element, the gas after removing the Hg element enters the catalytic oxidizer, the catalytic oxidizer performs catalytic reaction on the geothermal gas, and the gas is sent to the second absorber through a pipeline, in this embodiment, the geothermal gas from the second gas-liquid separator contains Hg and H₂S and CO₂The gas enters the first absorber after being pressurized, an adsorbent fixed bed is arranged in the first absorber, and the adsorbent can be vulcanized activated carbon and the like and can absorb Hg element in geothermal gas; the gas without Hg element enters a catalytic oxidizer, H₂S is oxidized to SO in a catalytic oxidizer₂(2H₂S+3O₂＝2SO₂+2H₂O), oxygen in the catalytic oxidizer is provided by outside air and enters the catalytic oxidizer through a pipeline; SO (SO)₂And CO₂The gas enters the second absorber, and the geothermal liquid entering the second absorber contains alkaline elements such as ammonia, so that the gas entering the second absorber can be neutralized into soluble compounds such as sulfite and bicarbonate by the geothermal liquid, and alkaline substances such as NaOH can be added into the geothermal liquid externally. In the second absorber, the neutralized liquid enters the recharging well through the scaling filter, and the residual gas is sent to the cooling tower, cooled and discharged to the environment.

In this embodiment, the preheater is connected to the second absorber, the geothermal liquid in the preheater exchanges heat with the organic working medium liquid from the condenser, the geothermal liquid releases heat in the preheater, the geothermal liquid after releasing heat enters the second absorber, and the organic working medium liquid absorbs heat to become saturated liquid, which enters the gas evaporator and the wet evaporator respectively, so that the organic working medium completes a closed cycle.

In this embodiment, the second absorber is connected to the cooling tower, the second absorber neutralizes alkaline elements contained in the geothermal liquid, the neutralized liquid enters the recharge well through the scaling filter, and the remaining gas is sent to the cooling tower for cooling.

In the embodiment, the thermocouple, the pressure sensor and the flowmeter of the detection system are connected with a background server through leads, the detection system transmits data to the background server for reading and storing, and the background server judges the corrosivity and the corrosion rate of the geothermal wet steam, the gas and the liquid to the ground according to the acquired temperature, pressure and flow measurement values so as to take corresponding measures to optimize the system and prevent damage to system devices.

In this embodiment, the temperature, pressure and flow of geothermal wet steam at the outlet of the production well, gas at the inlet of the first absorber and liquid at the inlet of the recharge well are tested. Using FIGS. 2 and 3, CO is controlled based on pressure and temperature measurements at various test points₂At a concentration of 2LB CO₂/100LB H₂O or less, H₂The concentration of S is below 0.1 mol%, so that the equipment and the pipeline of the geothermal system are not corroded.

In this embodiment, a compressor is added between the first absorber and the second gas-liquid separator, which is beneficial to increasing the pressure of the non-condensable gas and increasing CO₂The solubility in water reduces the corrosiveness of the pipeline.

In this embodiment, geothermal power generation may also be in the form of ground source heat pump, geothermal drying, or the like.

The invention provides a comprehensive geothermal utilization system based on non-condensable gas absorption and testing, which mainly comprises a geothermal power generation system, a non-condensable gas absorption recharging system and a detection device, wherein the geothermal power generation system respectively adopts gas and a wet evaporator, so that geothermal wet steam is separated and then an organic working medium is heated to push a steam turbine to generate electricity; the gas absorption and recharge device adopts a chemical adsorption method and a catalytic oxidation method to ensure that the non-condensable gas in the geothermal wet steam is respectively absorbed and oxidized and then neutralized by the geothermal tail water to reduce CO₂And H₂S and other non-condensable gases are discharged, and the greenhouse effect is reduced; the detection device can effectively measure the temperature, pressure, flow and other parameters of the inlet of the absorber at the outlet of the production well and the inlet of the recharging well, and is based on CO₂And H₂And (4) determining whether the components such as equipment, pipelines and the like of the geothermal utilization system are in the allowable range of acid corrosion by combining the S saturation curve chart with the temperature and pressure of the tested geothermal fluid, thereby optimizing the geothermal utilization system. The technical invention can effectivelyReduction of CO₂And H₂The emission of S reduces the greenhouse effect, thereby having great economic value and social value. The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.