Tail gas treatment and utilization system of gas generator set

Abstract

The invention discloses a gas generator set tail gas treatment and utilization system which comprises a gas generator set, the waste gas exhaust end of the gas generator set is sequentially connected with a DOC reactor, a mixing pipe, an SCR reactor, a flue gas heat recovery boiler and a condenser through pipelines, and one end of the condenser is connected with a carbon dioxide return pipe and a chimney through an exhaust pipe. The waste gas exhaust end of the gas generator set is sequentially connected with the DOC reactor, the mixing pipe, the SCR reactor, the flue gas heat recovery boiler and the condenser through pipelines, one end of the carbon dioxide return pipe is communicated with the vegetable greenhouse through a first valve and a filter, and a gas dispersion pipeline is arranged in the portion, at one end of the carbon dioxide return pipe, of the vegetable greenhouse. CO, C2H4, NOx and CO2 in tail gas generated by an engine can be purified, harmful substances such as CO, C2H4 and NOx can be completely treated, only CO2 is reserved, the temperature is reduced to more than 30 DEG C through a heat exchanger, the tail gas enters a vegetable greenhouse for heating and photosynthesis, and growth of organic vegetables is promoted.

Description

Technical Field

[0001] This invention relates to the technical field of generator set exhaust gas treatment equipment, specifically a gas generator set exhaust gas treatment and utilization system. Background Technology

[0002] Vegetable greenhouses require gas generator sets for power. These generators produce exhaust gases, primarily composed of nitrogen (approximately 75%), carbon dioxide, and water vapor – normal byproducts of combustion. However, the exhaust also contains harmful substances such as carbon monoxide (CO), nitrogen oxides (NOx), and hydrocarbons (HC). NOx is the primary pollutant. Therefore, exhaust gas treatment is necessary.

[0003] The prior art, patent application number 201920512793.3, describes a waste heat recovery device for gas generator exhaust. This device includes: a first heat exchange tube, a circulating water tank, a first water supply pipe, a boiler, a second heat exchange tube, a second water supply pipe, and a heating pipe. One end of the first heat exchange tube is connected to the exhaust port of the gas generator exhaust, and the other end passes through the circulating water tank and connects to the air inlet at the bottom of the boiler. The overall structure is compact, with low manufacturing and installation costs. It performs two consecutive waste heat recovery operations on the gas generator exhaust, effectively improving waste heat utilization. However, it is not convenient to utilize carbon dioxide in the purified exhaust, and the exhaust purification effect is poor. Summary of the Invention

[0004] The purpose of this invention is to provide a gas generator set exhaust gas treatment and utilization system to solve the problems in the prior art where it is inconvenient to utilize carbon dioxide in the purified exhaust gas and the exhaust gas purification effect is poor.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a gas generator set exhaust gas treatment and utilization system, comprising a gas generator set, wherein the exhaust gas discharge end of the gas generator set is sequentially connected to a DOC reactor, a mixing pipe, an SCR reactor, a flue gas heat recovery boiler and a condenser via a pipeline, one end of the condenser is connected to a carbon dioxide return pipe and a chimney via an exhaust pipe, one end of the carbon dioxide return pipe is connected to a vegetable greenhouse via a first valve and a filter, and a gas dispersion pipeline is provided inside the vegetable greenhouse at one end of the carbon dioxide return pipe.

[0006] Furthermore, the mixing pipe uses urea injection mixing, and the inner wall of the mixing pipe is equipped with a nozzle. One end of the nozzle is connected to a storage cylinder through a conveying pipe and a conveying pump.

[0007] Furthermore, the exhaust pipe is also equipped with a gas concentration detector and a second valve. The gas concentration detector is used to monitor the content of nitrogen oxides, carbon monoxide, carbon dioxide and ammonia.

[0008] Furthermore, both the first and second valves are solenoid valves, and the gas concentration detector and analyzer, the first and second valves are electrically connected to the controller inside the control cabinet on the outer wall of the equipment.

[0009] Furthermore, the gas dispersion pipeline includes a supporting pipeline, and a dispersion pipe is rotatably provided between the two supporting pipelines through a limiting support and a sealing ring, and the dispersion pipe has multiple gas outlets on one side.

[0010] Furthermore, the plurality of diverging tubes are connected by a first belt flywheel assembly, and one of the diverging tubes is also connected to an electric motor by a second belt flywheel assembly.

[0011] A method for treating and utilizing exhaust gas from a gas generator set, using the aforementioned gas generator set exhaust gas treatment and utilization system, includes the following steps: S1. Exhaust gas purification treatment: Exhaust gas discharge: The exhaust gas generated by the gas generator set is discharged from the exhaust end through a dedicated pipeline and enters the subsequent treatment process. Oxidation catalytic treatment: The exhaust gas is first passed into the DOC reactor, where the internally filled oxidation catalyst is used to oxidize and decompose combustible and harmful substances such as CO and C2H4 in the exhaust gas, thus initially purifying the exhaust gas. Urea Injection Mixing and Selective Reduction: The exhaust gas treated by the DOC reactor enters the mixing pipe. Urea in the storage tank is pumped and piped to nozzles on the inner wall of the mixing pipe, where it is uniformly injected into the exhaust gas. After mixing with the exhaust gas, the urea enters the SCR reactor, where it decomposes to produce ammonia. Under the action of the selective reduction catalyst, the ammonia reacts with NO in the exhaust gas... x The reaction occurs, reducing it to harmless nitrogen and water, thus completely removing the main pollutants; Waste heat recovery and cooling condensation: The purified exhaust gas flows sequentially through the flue gas heat recovery boiler and condenser. On the one hand, the waste heat in the exhaust gas is recovered, and on the other hand, the exhaust gas temperature is reduced to about 30°C through the condenser to meet the needs of vegetable greenhouses. S2, Intelligent Detection and Triage: Real-time component monitoring: When the condensed gas is discharged through the exhaust pipe, the gas concentration detector on the pipeline monitors the NO content in the gas in real time. x The content of CO, CO2, and NH3 is used to determine whether the gas meets the recovery standards; Automatic flow control: The detection data is transmitted to the controller in the control cabinet, which then controls the opening and closing of two solenoid valves. If the gas meets the standards: Open the first valve, close the second valve, and guide the pure CO2 into the recovery channel; If the gas does not meet the standards: open the second valve and close the first valve. The substandard gas will be discharged directly through the chimney to avoid polluting the greenhouse environment. S3 and CO2 recycling: Filtration and Transportation: The qualified CO2 is transported through the carbon dioxide return pipe. It first passes through a filter to remove any possible residual micro-impurities to ensure gas cleanliness, and then is continuously transported to the vegetable greenhouse. Uniform and Dispersed Gas Supply: After CO2 enters the greenhouse, it is efficiently utilized through a pre-set gas dispersion pipeline: The motor drives a dispersion tube to rotate through the second belt flywheel assembly, and the dispersion tube drives all dispersion tubes to rotate synchronously longitudinally through the first belt flywheel assembly; Multiple gas outlets on the dispersion tube spray CO2 evenly and dynamically into various areas of the greenhouse, ensuring that all vegetables can fully contact CO2. Dual benefits: Heating effect: CO2 at around 30℃ can directly supplement the heat of vegetable greenhouses and maintain a suitable growth temperature; Photosynthetic raw materials: CO2 is the core raw material for vegetable photosynthesis. A continuous supply of CO2 can promote the growth of organic vegetables and increase yield and quality.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a gas generator set whose exhaust gas outlet is sequentially connected via a pipeline to a DOC reactor, a mixing pipe, an SCR reactor, a flue gas heat recovery boiler, and a condenser. This process purifies CO, C2H4, NOx, and CO2 in the engine exhaust gas, removing harmful substances such as CO, C2H4, and NOx, retaining only CO2. The temperature is then lowered to around 30 degrees Celsius via a heat exchanger. One end of the carbon dioxide return pipe is connected to a vegetable greenhouse via a first valve and a filter, allowing the carbon dioxide to flow back into the greenhouse for heating and photosynthesis, promoting the growth of organic vegetables. Simultaneously, the exhaust gas is purified, preventing environmental pollution.

[0013] This invention utilizes a gas dispersion pipeline installed inside a vegetable greenhouse at one end of a carbon dioxide return pipe. The gas dispersion pipeline includes a supporting pipeline, and a diverging pipe is rotatably installed between the two supporting pipelines via a limiting support and a sealing ring. Multiple gas outlets are provided on one side of the diverging pipe, which allows the carbon dioxide in the treated waste gas to be evenly dispersed in the vegetable greenhouse, which is beneficial to improving the photosynthetic efficiency of vegetables in the greenhouse. Furthermore, the longitudinal rotation of multiple diverging pipes is driven by an electric motor and a belt flywheel assembly to achieve the purpose of dynamically spraying carbon dioxide.

[0014] This invention utilizes a gas concentration detector and a second valve installed on the exhaust pipe. Both the first and second valves are solenoid valves, and the gas concentration detector, the first valve, and the second valve are electrically connected to a controller inside the control cabinet on the outer wall of the equipment. The gas concentration detector is used to monitor the content of nitrogen oxides, carbon monoxide, carbon dioxide, and ammonia. When the treated exhaust gas meets the recovery standard, the first valve is opened and the second valve is closed, allowing carbon dioxide to enter the vegetable greenhouse. Conversely, when the treated exhaust gas does not meet the recovery standard, the second valve is opened and the first valve is closed, allowing the gas to be discharged from the chimney. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the gas dispersion pipeline structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the support pipeline of the present invention.

[0016] In the diagram: 1. Gas generator set; 2. Sealing ring; 3. DOC reactor; 4. Mixing pipe; 5. SCR reactor; 6. Flue gas heat recovery boiler; 7. Condenser; 8. Gas concentration detector and analyzer; 9. Exhaust pipe; 10. Chimney; 11. Carbon dioxide return pipe; 12. Second valve; 13. Filter; 14. First valve; 15. Storage cylinder; 16. Feed pump; 17. Feed pipe; 18. Support pipe; 19. Diverging pipe; 20. Limiting support; 21. First belt flywheel assembly; 22. Second belt flywheel assembly; 23. Electric motor; 24. Gas outlet. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1 , Figure 2 , Figure 3In this embodiment of the invention, a gas generator set exhaust gas treatment and utilization system includes a gas generator set 1 and a control cabinet for overall operation. The exhaust gas discharge end of the gas generator set 1 is sequentially connected to a DOC reactor 3, a mixing pipe 4, an SCR reactor 5, a flue gas heat recovery boiler 6, and a condenser 7 via pipes. One end of the condenser 7 is connected to a carbon dioxide return pipe 11 and a chimney 10 via an exhaust pipe 9. One end of the carbon dioxide return pipe 11 is connected to a vegetable greenhouse via a first valve 14 and a filter 13. The mixing pipe 4 uses urea injection mixing... The mixing pipe 4 has nozzles on its inner wall. One end of the nozzles is connected to a storage cylinder 15 through a feed pipe 17 and a feed pump 16. This system can purify CO, C2H4, NOx, and CO2 in the exhaust gas produced by the engine, and remove harmful substances such as CO, C2H4, and NOx, leaving only CO2. The temperature is also lowered to more than 30 degrees Celsius through a heat exchanger. Then, the carbon dioxide is returned to the vegetable greenhouse through the carbon dioxide return pipe 11 for heating and photosynthesis, promoting the growth of organic vegetables. At the same time, the exhaust gas is purified to avoid environmental pollution.

[0019] like Figure 1 As shown, a gas concentration detector 8 and a second valve 12 are also installed on the exhaust pipe 9. The gas concentration detector 8 is used to monitor the content of nitrogen oxides, carbon monoxide, carbon dioxide and ammonia. The first valve 14 and the second valve 12 are both solenoid valves, and the gas concentration detector 8, the first valve 14 and the second valve 12 are electrically connected to the controller in the control cabinet on the outer wall of the equipment. The gas concentration detector 8 is used to monitor the content of nitrogen oxides, carbon monoxide, carbon dioxide and ammonia. When the treated exhaust gas meets the recovery standard, the first valve 14 is opened and the second valve 12 is closed, and the carbon dioxide enters the vegetable greenhouse. Conversely, when the treated exhaust gas does not meet the recovery standard, the second valve 12 is opened and the first valve 14 is closed, and the gas is discharged from the chimney.

[0020] like Figure 2 and Figure 3 As shown, in order to evenly disperse carbon dioxide in the vegetable greenhouse, a gas dispersion pipeline is also provided inside the vegetable greenhouse at one end of the carbon dioxide return pipe 11. The gas dispersion pipeline includes a support pipe 18, and a divergence pipe 19 is rotatably connected between the two support pipes 18 through a limiting support 20 and a sealing ring 2. Multiple air outlets 24 are provided on one side of the divergence pipe 19, so that the carbon dioxide in the treated waste gas is evenly dispersed in the vegetable greenhouse, which is beneficial to improving the photosynthetic efficiency of vegetables in the greenhouse. The multiple divergence pipes 19 are connected by a first belt flywheel assembly 21, and one divergence pipe 19 is also connected to a motor 23 through a second belt flywheel assembly 22. The motor 23 and the belt flywheel assembly drive the multiple divergence pipes 19 to rotate longitudinally and adjust, so as to achieve the purpose of dynamically spraying carbon dioxide.

[0021] A method for treating and utilizing exhaust gas from a gas generator set, using the aforementioned gas generator set exhaust gas treatment and utilization system, includes the following steps: S1. Exhaust gas purification treatment: Exhaust gas discharge: The exhaust gas generated by the gas generator set is discharged from the exhaust end through a dedicated pipeline and enters the subsequent treatment process. Oxidation catalytic treatment: The exhaust gas is first passed into the DOC reactor, where the internally filled oxidation catalyst is used to oxidize and decompose combustible and harmful substances such as CO and C2H4 in the exhaust gas, thus initially purifying the exhaust gas. Urea Injection Mixing and Selective Reduction: The exhaust gas treated by the DOC reactor enters the mixing pipe. Urea in the storage tank is pumped and piped to nozzles on the inner wall of the mixing pipe, where it is uniformly injected into the exhaust gas. After mixing with the exhaust gas, the urea enters the SCR reactor, where it decomposes to produce ammonia. Under the action of the selective reduction catalyst, the ammonia reacts with NO in the exhaust gas... x The reaction occurs, reducing it to harmless nitrogen and water, thus completely removing the main pollutants; Waste heat recovery and cooling condensation: The purified exhaust gas flows sequentially through the flue gas heat recovery boiler and condenser. On the one hand, the waste heat in the exhaust gas is recovered, and on the other hand, the exhaust gas temperature is reduced to about 30°C through the condenser to meet the needs of vegetable greenhouses. S2, Intelligent Detection and Triage: Real-time component monitoring: When the condensed gas is discharged through the exhaust pipe, the gas concentration detector on the pipeline monitors the NO content in the gas in real time. x The content of CO, CO2, and NH3 is used to determine whether the gas meets the recovery standards; Automatic flow control: The detection data is transmitted to the controller in the control cabinet, which then controls the opening and closing of two solenoid valves. If the gas meets the standards: Open the first valve, close the second valve, and guide the pure CO2 into the recovery channel; If the gas does not meet the standards: open the second valve and close the first valve. The substandard gas will be discharged directly through the chimney to avoid polluting the greenhouse environment. S3 and CO2 recycling: Filtration and Transportation: The qualified CO2 is transported through the carbon dioxide return pipe. It first passes through a filter to remove any possible residual micro-impurities to ensure gas cleanliness, and then is continuously transported to the vegetable greenhouse. Uniform and Dispersed Gas Supply: After CO2 enters the greenhouse, it is efficiently utilized through a pre-set gas dispersion pipeline: The motor drives a dispersion tube to rotate through the second belt flywheel assembly, and the dispersion tube drives all dispersion tubes to rotate synchronously longitudinally through the first belt flywheel assembly; Multiple gas outlets on the dispersion tube spray CO2 evenly and dynamically into various areas of the greenhouse, ensuring that all vegetables can fully contact CO2. Dual benefits: Heating effect: CO2 at around 30℃ can directly supplement the heat of vegetable greenhouses and maintain a suitable growth temperature; Photosynthetic raw materials: CO2 is the core raw material for vegetable photosynthesis. A continuous supply of CO2 can promote the growth of organic vegetables and increase yield and quality.

[0022] The working principle and usage process of this invention are as follows: In use, the exhaust gas outlet of the gas generator set 1 is connected in sequence to a DOC reactor 3, a mixing pipe 4, an SCR reactor 5, a flue gas heat recovery boiler 6, and a condenser 7 via a pipeline. One end of the condenser 7 is connected to a carbon dioxide return pipe 11 and a chimney 10 via an exhaust pipe 9. One end of the carbon dioxide return pipe 11 is connected to the vegetable greenhouse via a first valve 14 and a filter 13. This process can purify CO, C2H4, NOx, and CO2 in the exhaust gas produced by the engine, and remove harmful substances such as CO, C2H4, and NOx, leaving only CO2. The temperature is also lowered to over 30 degrees Celsius through a heat exchanger. Then, the carbon dioxide is returned to the vegetable greenhouse via the carbon dioxide return pipe 11 for heating and photosynthesis, promoting the growth of organic vegetables. At the same time, the exhaust gas is purified to avoid environmental pollution.

[0023] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas generator set exhaust gas treatment and utilization system, comprising a gas generator set (1), characterized in that: The exhaust end of the gas generator set (1) is connected in sequence to a DOC reactor (3), a mixing pipe (4), an SCR reactor (5), a flue gas heat recovery boiler (6), and a condenser (7) via a pipe. One end of the condenser (7) is connected to a carbon dioxide return pipe (11) and a chimney (10) via an exhaust pipe (9). One end of the carbon dioxide return pipe (11) is connected to a vegetable greenhouse via a first valve (14). A gas dispersion pipeline is provided in the vegetable greenhouse at one end of the carbon dioxide return pipe (11).

2. The exhaust gas treatment and utilization system for a gas generator set according to claim 1, characterized in that: The mixing pipe (4) uses urea injection mixing, and the inner wall of the mixing pipe (4) is provided with a nozzle. One end of the nozzle is connected to a storage cylinder (15) through a conveying pipe (17) and a conveying pump (16).

3. The exhaust gas treatment and utilization system for a gas generator set according to claim 1, characterized in that: The exhaust pipe (9) is also equipped with a gas concentration detector (8) and a second valve (12). The gas concentration detector (8) is used to monitor the content of nitrogen oxides, carbon monoxide, carbon dioxide and ammonia.

4. The exhaust gas treatment and utilization system for a gas generator set according to claim 3, characterized in that: Both the first valve (14) and the second valve (12) are solenoid valves, and the gas concentration detector (8), the first valve (14) and the second valve (12) are electrically connected to the controller in the control cabinet on the outer wall of the equipment.

5. The exhaust gas treatment and utilization system for a gas generator set according to claim 1, characterized in that: The gas dispersion pipeline includes a support pipeline (18), and a divergence pipe (19) is rotatably provided between the two support pipelines (18) through a limiting support (20). The divergence pipe (19) has multiple gas outlets (24) on one side.

6. The exhaust gas treatment and utilization system for a gas generator set according to claim 5, characterized in that: The multiple diverging tubes (19) are connected by a first belt flywheel assembly (21), and one of the diverging tubes (19) is also connected to an electric motor (23) by a second belt flywheel assembly (22).

7. A method for treating and utilizing exhaust gas from a gas generator set, characterized in that: The exhaust gas treatment and utilization system for a gas generator set according to any one of claims 1-6 includes the following steps: S1. Exhaust gas purification treatment: Exhaust gas discharge: The exhaust gas generated by the gas generator set is discharged from the exhaust end through a dedicated pipeline and enters the subsequent treatment process. Oxidation catalytic treatment: The exhaust gas is first passed into the DOC reactor, where the internally filled oxidation catalyst is used to oxidize and decompose the combustible and harmful substances CO and C2H4 in the exhaust gas, thus initially purifying the exhaust gas. Urea Injection Mixing and Selective Reduction: The exhaust gas treated by the DOC reactor enters the mixing pipe. Urea in the storage tank is pumped and piped to nozzles on the inner wall of the mixing pipe, where it is uniformly injected into the exhaust gas. After mixing with the exhaust gas, the urea enters the SCR reactor, where it decomposes to produce ammonia. Under the action of the selective reduction catalyst, the ammonia reacts with NO in the exhaust gas... x The reaction occurs, reducing it to harmless nitrogen and water; Waste heat recovery and cooling / condensation: The purified exhaust gas flows sequentially through the flue gas heat recovery boiler and the condenser, recovering the waste heat in the exhaust gas on the one hand, and cooling the exhaust gas through the condenser on the other hand. S2, Intelligent Detection and Triage: Real-time component monitoring: When the condensed gas is discharged through the exhaust pipe, the gas concentration detector on the pipeline monitors the NO content in the gas in real time. x The content of CO, CO2, and NH3 is used to determine whether the gas meets the recovery standards; Automatic flow control: The detection data is transmitted to the controller in the control cabinet, which then controls the opening and closing of two solenoid valves. If the gas meets the standards: Open the first valve, close the second valve, and guide the pure CO2 into the recovery channel; If the gas does not meet the standards: open the second valve and close the first valve. The substandard gas will be discharged directly through the chimney to avoid polluting the greenhouse environment. S3 and CO2 recycling: Filtration and transportation: The qualified CO2 is transported through the carbon dioxide return pipe. It first passes through the filter to remove any possible residual micro-impurities, and then is continuously transported to the vegetable greenhouse. Uniformly distributed gas supply: After CO2 enters the greenhouse, it is utilized through a pre-set gas dispersion pipeline; the motor drives a dispersion tube to rotate through the second belt flywheel group, and the dispersion tube drives all dispersion tubes to rotate synchronously longitudinally through the first belt flywheel group; multiple gas outlets on the dispersion tube spray CO2 evenly and dynamically into various areas of the greenhouse.

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