CN208920078U - A kind of flare gas recovery processing system for power generation - Google Patents

A kind of flare gas recovery processing system for power generation Download PDF

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Publication number
CN208920078U
CN208920078U CN201821665073.2U CN201821665073U CN208920078U CN 208920078 U CN208920078 U CN 208920078U CN 201821665073 U CN201821665073 U CN 201821665073U CN 208920078 U CN208920078 U CN 208920078U
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China
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gas
power generation
torch
concentration sensor
air accumulator
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CN201821665073.2U
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Chinese (zh)
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王志荣
王相文
龚俊辉
赵坤
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Nanjing Tech University
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Nanjing Tech University
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Abstract

A kind of flare gas recovery processing system and its recovery and treatment method for power generation of the utility model is related to waste gas recovery, especially a kind of processing and recycling suitable for torch gas.Including torch gas gas gathering line, the first air accumulator, electrically operated valve, gas holder and linkage control circuit;The linkage control circuit include the first concentration sensor, electric current relay, power supply, the first air pump and electrically operated valve Electric Actuator;Low concentration torch gas processing pipeline is also connected between first air accumulator and gas holder;The low concentration torch gas processing pipeline includes water sealed tank, liquid separation tank, pressure-swing absorber, the second concentration sensor, control module, the second air pump and the second air accumulator, is also connected with gas power generation system in the gas outlet of the gas holder;The gas power generation system includes at least burner, engine and generator, and the burner, engine and generator are sequentially connected by pipeline.

Description

A kind of flare gas recovery processing system for power generation
Technical field
A kind of flare gas recovery processing system for power generation of the utility model is related to waste gas recovery, especially a kind of to be applicable in In the processing and recycling of torch gas.
Background technique
Torch gas is mainly the exhaust gas that workshop is discharged under normal operation or accident condition, and main component is hydrocarbon And hydrogen, wherein being harmful to the human body there are also many substances.Their majorities are heavier than air, if being put into atmosphere, through spreading, can deposit On the ground, and reach very high concentration, this will cause serious environmental pollution, is detrimental to health.It, will if encountering kindling material Fire is caused even to explode.These danger occur in order to prevent, these gases are put together burn-up by people, to prevent future trouble.
These are inflammable, explosive, toxic, the mordant gas of torch passes through the carbon dioxide for becoming harmless, water of burning Or nontoxic, other lower substances of toxicity.However the torch gas of these high heating values is directly burnt up and is extremely wasted, while for sound Answer the call of " Torch ", many factories all recycling torch gas in every possible means, as useful fuel.Cause This, recycling torch gas can not only create economic benefit, moreover it is possible to reduce atmosphere pollution, have good environmental benefit and society's effect Benefit.
Currently, the recovery method of torch gas is broadly divided into raw material type and two kinds of fuel type both at home and abroad.Raw material type is by torch Useful component recycling in gas is reprocessed as a raw material for production to increase product yield, which includes suitable for torch gas The case where certain content higher individual useful constituents, this method need to consider technologic possibility and economically reasonable Property.Fuel type is to use the torch gas recycled as fuel, and such case generally is suitable for bigger chemical plant installations, especially suitable It is excessively complicated for this torch gas overall composition of petrochemical plant, the case where being difficult separation and Extraction a certain kind component.
Lacking at present can be generally applicable, and is adjustable recycling, reutilization system and the side of the torch gas of torch gas concentration Method.
Utility model content
The purpose of this utility model is to provide a kind of flare gas recovery processing system for power generation in view of the above shortcomings System no matter the torch gas concentration level discharged can be recycled effectively, and adjusts its concentration range to improve gas burning This combustion gas is passed through burning in burner later and obtains thermal energy, recycles external-combustion engine to convert heat into mechanical energy, finally by efficiency Mechanical energy is changed into the electricity-generating method of electric energy using generator.
The utility model adopts the following technical solutions to achieve:
Flare gas recovery processing system for power generation includes torch gas gas gathering line, the first air accumulator, electrically operated valve, gas Cabinet and linkage control circuit, the torch gas gas gathering line, the first air accumulator, electrically operated valve and gas holder are successively connected by pipeline It connects;The linkage control circuit includes the first concentration sensor, electric current relay, power supply, the first air pump and electrically operated valve Electric Actuator;The first concentration sensor measuring signal port is connected to torch gas gas gathering line close to the first air accumulator On pipeline, the signal output end interface of first concentration sensor is connected with the low-voltage control circuit of electric current relay, described The high pressure working road of electric current relay is connected in parallel the Electric Actuator of the first air pump and electrically operated valve, and described first is empty The gas outlet of air pump is connected with the first air accumulator;
Low concentration torch gas processing pipeline is also connected between first air accumulator and gas holder;The low concentration torch Gas disposal pipeline includes water sealed tank, liquid separation tank, pressure-swing absorber, the second concentration sensor, control module, the second air pump and Two air accumulators, the water sealed tank, liquid separation tank, pressure-swing absorber and the second air accumulator are sequentially connected;The survey of second concentration sensor Amount signal port is mounted on the pipeline between pressure-swing absorber and the second air accumulator;The information output of second concentration sensor Mouth is connected to control module, and the other end of control module connects the control circuit of the second air pump, and second air pump goes out Port is connected with the second air accumulator;
Gas power generation system is also connected in the gas outlet of the gas holder;The gas power generation system includes at least burning Device, engine and generator, the burner, engine and generator are sequentially connected by pipeline.
The electric current relay uses electromagnetic type current relay.
The control module uses computer or single-chip microcontroller, and commercially available MCS51 series monolithic can be used in the single-chip microcontroller.
PSA technique used by pressure-swing absorber is divided into first stage and second stage totally two stages;Optionally, first The adsorbent that a stage uses is 13X(13X molecular sieve);Optionally, the adsorbent that second stage uses is CMS(carbon molecules Sieve);
The engine uses Stirling engine.
Working principle: the utility model uses the first concentration sensor and electric current in high concentration torch Flash Gas Compression Skid System The linkage of relay, when the first concentration sensor detects that discharged torch gas concentration is higher, the first concentration sensor Electric signal is issued to electric current relay, so that electric current relay actuation connects linkage control circuit, the operating of the first air pump, to First air accumulator delivery air, air mixes in the first air accumulator with torch gas makes the reduction of torch gas concentration, and electrically operated valve Actuator controls electrically operated valve and opens, and mixed gas is exported by electrically operated valve to gas holder;When the first concentration sensor is surveyed When the input signal measured is unable to reach given threshold, the first concentration sensor no signal current is transmitted to electric current relay, electricity Current relay can not be attracted to which open circuit occurs for operating circuit, and first air pump and electrically operated valve of the power supply without normal direction parallel connection execute Device exports electric current, therefore electric valve actuator can not drive valve, and electrically operated valve is kept closed, and gas is in the first gas storage It is gathered in tank, so that the first gas storage pressure inside the tank rises, light concentration gas breaks through water sealed tank and enters pressure-swing absorber, becoming thereafter Removing N2 and CO2 leads to the second air accumulator to purify to combustible component in torch gas, after purification in pressure adsorption tower;By second Concentration sensor detects the flammable torch gas concentration in the pipeline between pressure-swing absorber and the second air accumulator, and by concentration information It is transferred in control module, is issued and instructed by control module, the second air pump of control is passed through suitable sky into the second air accumulator Gas controls the combustable gas concentration in the second air accumulator within the scope of optimal burning concentration.
Utility model advantage: a kind of flare gas recovery processing system for power generation of the utility model is structurally reasonable, operation Convenient, device has used two modules of high concentration torch Flash Gas Compression Skid System and low concentration torch gas processing pipeline simultaneously, has had Effect ground controls the concentration of torch gas within the scope of optimal burning concentration, so as to improve combustion gas utilization rate.Meanwhile for In the part of gas power generation system, engine uses Stirling engine, because Stirling engine is as typical external combustion Machine has the characteristics that require fuel characteristic low compared to internal combustion engine, it is only necessary to guarantee its hot continuous heat supply of cylinder end i.e. Can, the thermal energy stable conversion so as to discharge burner is mechanical energy.The utility model can effectively recycle torch gas simultaneously Stable electric generation is carried out, and whole process the degree of automation is higher.
Detailed description of the invention
Below with reference to attached drawing, the utility model is described in further detail:
Fig. 1 is Tthe utility model system structural principle block diagram;
Fig. 2 is the utility model recovery and treatment method implementation flow chart.
In figure: 1, first concentration sensor, 2, electric current relay, the 3, first air pump, 4, power supply, 5, Electric Actuator, 6, the first air accumulator, 7, electrically operated valve, 8, liquid separation tank, 9, pressure-swing absorber, 10, gas holder, 11, burner, 12, engine, 13, Generator, 14, water sealed tank, the 15, second air accumulator, the 16, second concentration sensor, 17, control module, the 18, second air pump.
Specific embodiment
Referring to attached drawing 1, the flare gas recovery processing system for power generation include torch gas gas gathering line, the first air accumulator 6, Electrically operated valve 7, gas holder 10 and linkage control circuit, the torch gas gas gathering line, the first air accumulator 6, electrically operated valve 7 and gas holder 10 are sequentially connected by pipeline;The linkage control circuit includes the first concentration sensor 1, electric current relay 2, power supply 4, first Air pump 3 and the Electric Actuator of electrically operated valve 5;The first concentration sensor measuring signal port is connected to torch gas gas collection Pipeline is on the pipeline of the first air accumulator 6, the signal output end interface and electric current relay 2 of first concentration sensor 1 Low-voltage control circuit be connected, the high pressure working of the electric current relay 2 road is connected in parallel the first air pump 3 and motor-driven valve The Electric Actuator 5 of door, the gas outlet of first air pump 3 is connected with the first air accumulator 6;
Low concentration torch gas processing pipeline is also connected between first air accumulator 6 and gas holder 10;The low concentration Torch gas processing pipeline includes water sealed tank 14, liquid separation tank 8, pressure-swing absorber 9, the second concentration sensor 16, control module 7, Two air pumps 18 and the second air accumulator 15, the water sealed tank 14, liquid separation tank 8, pressure-swing absorber 9 and the second air accumulator 15 successively connect It connects;The measuring signal port of second concentration sensor 16 is mounted on the pipeline between pressure-swing absorber 9 and the second air accumulator 15; The information output mouth of second concentration sensor 16 is connected to control module 7, and the other end of control module 7 connects the second air pump 18 control circuit, the gas outlet of second air pump 18 are connected with the second air accumulator 15;It is connected in the gas outlet of gas holder 10 Gas power generation system, including the burner 11, engine 12 and generator 13 being sequentially connected by pipeline.
Referring to attached drawing 2, a kind of recovery and treatment method of the flare gas recovery processing system for power generation, including walk as follows It is rapid:
1) torch gas of the first concentration sensor real-time detection torch gas gas gathering line discharge, when the first concentration sensor is examined When measuring discharged torch gas concentration higher than preset threshold, it is transferred to step 2;Otherwise it enters step 3);
2) the first concentration sensor issues electric signal to electric current relay;Electric current relay actuation connects linkage control circuit Logical, the operating of the first air pump to the first air accumulator delivery air, is mixed in the first air accumulator with torch gas by air, makes fire Torch gas concentration reduces;Electric valve actuator controls electrically operated valve and opens, and above-mentioned mixed gas passes through electrically operated valve to gas Cabinet output;
3) when the torch gas concentration of discharge is lower than preset threshold, electrically operated valve is closed, and the torch gas of discharge is in the first storage It is gathered in gas tank, so that the first gas storage pressure inside the tank rises;
3-1) gas pressure, which gradually rises, finally breaks through water sealed tank, into liquid separation tank;
Gas after 3-2) carrying out liquid separation in liquid separation tank is entered in pressure-swing absorber by pipeline, in pressure-swing absorber The middle purification for carrying out flammable torch gas, the flammable torch gas after purification lead to the second air accumulator along pipeline;
3-3) it is mounted on the second concentration sensor detection pressure-swing absorber in pipeline and the pipeline between the second air accumulator Interior flammable torch gas concentration, and concentration information is transferred in control module;
3-4) control module is issued to the second air pump according to incoming concentration information and is instructed, and the second air pump of control is to the It is passed through suitable air in two air accumulators, the combustable gas concentration in the second air accumulator is controlled in optimal burning concentration range It is interior.
Step 3-2) described in flammable torch gas purification i.e. remove N2And CO2, to be mentioned to combustible component in torch gas It is pure.
Step 3-4) described in optimal burning concentration range, that is, mixed torch gas gas concentration be 15%~30%, packet Include two endpoint values.
The model used below to the component in the utility model makes introduction, but is not limited to cited model.
MP-4 combustible gas sensor can be used in first concentration sensor and the second concentration sensor.
The electric current relay uses electromagnetic type current relay, and commercially available GRM1555C1H300JZ01D model can be used Electromagnetic type current relay.
Commercially available YT-10AVF air compressor machine can be used in first air pump and the second air pump.
The power supply uses 220V alternating current.
The Electric Actuator uses JYL-100/200 essence small-size electric actuator.
The volume about 180m3 of first air accumulator and the second air accumulator, can be used commercially available CRVZS-04 air accumulator.
The electrically operated valve uses the electronic flanged ball valve of commercially available LDBAA.
The liquid separation tank uses commercially available V301 sour gas liquid separation tank.
Dry gas-holder can be used in the gas holder, such as commercially available Wan Baishuan film gas storage holder.
Commercially available RIELLO 40FS20 burner can be used in burner.
Engine uses Stirling engine, and III type Stirling engine of V4-275R Mk can be used.
Generator uses OB2500JK3KW generator.
The water sealed tank of commercially available DN-400 model can be used in water sealed tank.
With reference to the accompanying drawing 2 and specific embodiment the technical solution of the utility model is further described.
For certain plant emissions torch gas concentration between 5% to 40%, the optimal burning concentration range of the torch gas is 15% to arrive 30%, the main component of torch gas is methane, and the gas output of torch gas gas collecting tube is 1m3/s.The appearance of first air accumulator 6 Product is 180m3;The concentration threshold that first concentration sensor 1 is set is 30%, i.e. the torch gas warp when concentration higher than 30% When by pipeline to the first air accumulator 6, the first concentration sensor 1 being connected on 6 front-end pipelines of the first air accumulator is measured Concentration value is more than specific threshold value 30%, and the first concentration sensor 1 can correspondingly export the current signal of a setting, this electricity Stream signal is transferred to electric current relay 2, and the actuation of electric current relay 2 makes circuit form complete loops, and power supply 4 starts to electric machine Power supply, the first air pump 3 operating and pipeline by being connected on the first air accumulator 6 is to 6 input air of the first air accumulator, first The amount of 3 input air of air pump is set according to the actual conditions of the factory, and the setting value which can be used is in 0.35m Between 3/s to 1m3/s;While the operation of the first air pump 3, the Electric Actuator 5 of electrically operated valve in parallel is synchronized out therewith Beginning work, control electrically operated valve 7 are opened, so that the gas in the first air accumulator 6 be made to export by electrically operated valve 7 to gas holder 10.
If the input signal that the first concentration sensor 1 measures is unable to reach given threshold, i.e. gas concentration is lower than 30%, Then 1 no signal current of the first concentration sensor is transmitted to electromagnetic type current relay 2, and electromagnetic type current relay 2 can not be attracted To which operating circuit keeps open circuit, the Electric Actuator 5 of air pump 3 and electrically operated valve of the power supply 4 without normal direction parallel connection exports electric current, Therefore the Electric Actuator 5 of electrically operated valve can not drive electrically operated valve 7, and electrically operated valve 7 is kept closed, thus the first gas storage Gas in tank 6 is built up, and gas pressure, which gradually rises, finally to be broken through water sealed tank 14 and lead to liquid separation tank 8, in liquid separation tank 8 into Gas after row liquid separation is entered in pressure-swing absorber 9 by pipeline, carries out mentioning for flammable torch gas by pressure-swing absorber 9 Pure, the flammable torch gas of higher concentration leads to the second air accumulator 15, transmission of the torch gas in this segment pipe along pipeline after purification The torch gas concentration passed through in the process by the second concentration sensor 16 being installed on pipeline, the detection of the second concentration sensor 16 And concentration information is transferred in control module 17, it is issued and is instructed by control module 17, the second air pump 18 of control is stored up to second Suitable air is passed through in gas tank 15, so that the combustable gas concentration in the second air accumulator 15 is carried out dilution appropriate and is controlled Within the scope of optimal burning concentration.For example when the concentration detected is 90%, control module, which can issue instruction, keeps air pump defeated Gas flow out is between 2m3/s to 5m3/s, so that mixed gas concentration is maintained at 15% to 30% optimum burning concentration Range intervals.Mixed gas is exported by pipeline to gas holder 10 in the second air accumulator 15.
Concentration is in the torch gas within the scope of optimum burning concentration after treatment for storage front in the gas holder 10, and leads to Combustion heat release will be carried out by crossing pipeline in fuel gas transmission to burner 11, burner 11 is connect with engine 12,11 internal combustion of burner It burns the thermal energy generated and mechanical energy is converted heat by engine 12, engine 12 is connected with generator 13, engine 12 Generated mechanical energy finally converts electric energy for mechanical energy by generator 13.
By testing and testing discovery, a kind of flare gas recovery processing system for power generation of the utility model can be effective Recycling torch gas simultaneously carries out stable electric generation, and whole process the degree of automation is higher, contributes for electricity saving and energy saving, is suitble to push away It is wide to use.

Claims (6)

1. a kind of flare gas recovery processing system for power generation, it is characterised in that: including torch gas gas gathering line, the first gas storage Tank, electrically operated valve, gas holder and linkage control circuit, the torch gas gas gathering line, the first air accumulator, electrically operated valve and gas holder are logical Piping is sequentially connected;The linkage control circuit includes the first concentration sensor, electric current relay, power supply, the first air pump With the Electric Actuator of electrically operated valve;It is close that the first concentration sensor measuring signal port is connected to torch gas gas gathering line On the pipeline of first air accumulator, the signal output end interface of first concentration sensor and the low voltage control electricity of electric current relay Road is connected, and the high pressure working road of the electric current relay is connected in parallel the electronic execution of the first air pump and electrically operated valve The gas outlet of device, first air pump is connected with the first air accumulator;
Low concentration torch gas processing pipeline is also connected between first air accumulator and gas holder;At the low concentration torch gas Reason pipeline includes water sealed tank, liquid separation tank, pressure-swing absorber, the second concentration sensor, control module, the second air pump and the second storage Gas tank, the water sealed tank, liquid separation tank, pressure-swing absorber and the second air accumulator are sequentially connected;The measurement of second concentration sensor is believed Number port is mounted on the pipeline between pressure-swing absorber and the second air accumulator;The information output mouth of second concentration sensor connects It is connected to control module, the other end of control module connects the control circuit of the second air pump, the gas outlet of second air pump It is connected with the second air accumulator;
Gas power generation system is also connected in the gas outlet of the gas holder;The gas power generation system include at least burner, Engine and generator, the burner, engine and generator are sequentially connected by pipeline.
2. the flare gas recovery processing system according to claim 1 for power generation, it is characterised in that: the electric current relay Device uses electromagnetic type current relay.
3. the flare gas recovery processing system according to claim 1 for power generation, it is characterised in that: the control module Using computer or single-chip microcontroller.
4. the flare gas recovery processing system according to claim 1 for power generation, it is characterised in that: the engine is adopted Use Stirling engine.
5. the flare gas recovery processing system according to claim 1 for power generation, it is characterised in that: first concentration Sensor and the second concentration sensor use MP-4 combustible gas sensor.
6. the flare gas recovery processing system according to claim 1 for power generation, it is characterised in that: first air Pump and the second air pump use YT-10AVF air compressor machine.
CN201821665073.2U 2018-10-15 2018-10-15 A kind of flare gas recovery processing system for power generation Withdrawn - After Issue CN208920078U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109185901A (en) * 2018-10-15 2019-01-11 南京工业大学 A kind of flare gas recovery processing system and its recovery and treatment method for power generation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109185901A (en) * 2018-10-15 2019-01-11 南京工业大学 A kind of flare gas recovery processing system and its recovery and treatment method for power generation
CN109185901B (en) * 2018-10-15 2023-07-18 南京工业大学 Flare gas recycling system for power generation and recycling method thereof

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