CN102562131B - Coal mine gas comprehensive application system and application method thereof - Google Patents
Coal mine gas comprehensive application system and application method thereof Download PDFInfo
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- CN102562131B CN102562131B CN201010602890.5A CN201010602890A CN102562131B CN 102562131 B CN102562131 B CN 102562131B CN 201010602890 A CN201010602890 A CN 201010602890A CN 102562131 B CN102562131 B CN 102562131B
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention discloses a coal mine gas comprehensive application system and an application method thereof. The system comprises a coal mine ventilation air measuring component, a coal mine gas measuring component, a high-concentration gas treatment subsystem, a low-concentration gas treatment subsystem, a coal mine ventilation air treatment subsystem and an afterheat treatment subsystem, wherein a high-concentration gas pre-treatment device and a high-concentration gas generator set are connected via a pipeline to form the high-concentration gas treatment subsystem, a safe conveying device, a low-concentration gas pre-treatment device and a low-concentration gas generator set are connected via pipelines to form the low-concentration gas treatment subsystem, the high-concentration gas generator set and the low-concentration gas generator set are respectively connected with a power grid via cables, a ventilation air delivering connecting device, a mixing device and a ventilation air oxidization device are connected via pipelines to form the coal mine ventilation air treatment subsystem, and the afterheat treatment subsystem is respectively connected with the high-concentration gas treatment subsystem, the low-concentration gas treatment subsystem and the coal mine ventilation air treatment subsystem. The coal mine gas comprehensive application system and the application method can be used for comprehensively applying gas with different concentrations, utilization rate of the gas is the highest, emission of greenhouse gas is reduced, and comprehensive recycling of energy is realized.
Description
Technical field
The present invention relates to device and the application process thereof of a kind of environmental protection and the energy capable of circulation, be specifically related to a kind of coal mine gas comprehensive application system and Application way thereof.
Background technique
Coal mine gas is commonly called as coal-seam gas and belongs to Unconventional forage, is high-grade energy and industrial chemicals.
China is not only a coal resources big country, and coal bed gas resource is also extremely abundant.The Chinese government and relevant industrial department show great attention to the exploration and development of coal-seam gas, and this year, effect was striking.But for various reasons, input is still not fully up to expectations with the ratio of return.First, Chinese Geological complicated condition, mining gas-geology theory is still immature, System Approach and summary are lacked to the Coalbed Methane Contents, coal seam reservoirs physical property, control gas geologic feature etc. of the main stored zone of national coal mine gas, coal mine gas chooses evaluation criterion and method needs to be studied, and this is that some coal mine gas developed the improper major reason in constituency in the past.Secondly, coal seam reservoirs is different from conventional gas reservoir, and the relevant public good technology in the exploration and development of coal mine gas is urgently improved, and China's coal-mine gas pumping technology backwardness relatively, the utilization of coal mine gas limits to some extent.Moreover extraction way easily causes suction air in gas to reduce gas density improperly, make the concentration of gas between blast area within, there is potential safety hazard.Because the gas explosion limit is 5% ~ 15%, so under safing prerequisite, before 2010, a regulation can utilize the coal mine gas of concentration more than 30%, but along with the development of technology, the adjustment of national policy, the coal mine gas of less than 30% also can limitedly use, and operation technique needs to be improved further.The exploitation of coal mine gas have important strategic importance for the development of Chinese national economy, it will improve the energy resource structure of China, promote that the energy system of China based on coal progressively changes to environmentally friendly mode of sustainable development, form clear energy sources NPD projects, simultaneously, the exploitation of coal mine gas fundamentally can also prevent coal mine gas explosion, improve Safety of Coal Mine Production condition, and due to the greenhouse effect of methane be 21 times of carbon dioxide, make full use of coal mine gas and can reduce the strong greenhouse effect that discharge of methane causes, to the protection of global atmosphere environment, there is positive role.
The extraction system in colliery can produce very large difference because of different extraction technique and electric motor power, the coal mine gas concentration height that extraction is gone out.According to the difference of concentration, coal mine gas can be divided into following a few class:
1. the concentration high concentration gas that is greater than 30%, this part gas safety is reliable, such as sends into city gas pipeline, as civilian by can directly utilize after the series of processes such as the removal of impurity, purification.
2. concentration is greater than 5% low concentration gas being less than 30%, and needing according to recent national regulation could restricted use under the prerequisite of installing safe delivery system.
3. in coalmine ventilation tunnel, also there is the wind resource assessment that concentration is no more than 0.7%, be commonly called as mine air-lack.This part gas is all directly emptying owing to can not directly utilize substantially, wastes available resources.Though the low but total amount of methane content is very large in mine air-lack, usually accounts for 70% ~ 80% of whole coal mine gas discharge amount, namely account for greenhouse gas emissions more than 70%, cause the discharge of a large amount of greenhouse gases.
Summary of the invention
The object of this invention is to provide a kind of coal mine gas comprehensive application system and Application way thereof, different process routes can be adopted to fully utilize to the coal mine gas of variable concentrations, make the utilization ratio of whole coal mine gas reach maximization.For the mine air-lack that a large amount of concentration is ultralow, use regenerative oxidation cracking device to destroy trace methane, reclaim the heat that cracking produces simultaneously, minimizing coal mine gas cause greenhouse effect while, realize the comprehensive reutilization of the energy.
To achieve these goals, the present invention is achieved through the following technical solutions:
A kind of coal mine gas comprehensive application system, be characterized in, this application system comprises mine air-lack components of assays, coal mine gas components of assays, high concentration gas processing subsystem, low concentration gas processing subsystem, mine air-lack processing subsystem and Heat Treatment subtense angle;
The inlet opening of described coal mine gas components of assays is connected by the exhaust outlet of pipeline with coal mine gas drainage pump house;
The inlet opening of described mine air-lack components of assays is connected by the exhaust outlet of pipeline with coalmine ventilation tunnel;
Described high concentration gas processing subsystem comprises high concentration gas pre-treater, high concentration jet dynamic control; The suction port of described high concentration gas pre-treater is connected by pipeline with the outlet of coal mine gas components of assays, the suction port of high concentration jet dynamic control is connected by the air outlet of pipeline with high concentration gas pre-treater, and the power end of described high concentration jet dynamic control is connected with electrical network by cable;
Described low concentration gas processing subsystem comprises security conveyer, low concentration gas pre-treater, low-concentration fuel generator set; The suction port of described security conveyer is connected by pipeline with the outlet of coal mine gas components of assays, low concentration gas pre-treater suction port is connected with the air outlet of security conveyer by pipeline, and low-concentration fuel generator set suction port is connected by the air outlet of pipeline with low concentration gas pre-treater; The power end of described low-concentration fuel generator set is connected with electrical network by cable;
Described mine air-lack processing subsystem comprises weary wind delivery connection device, weary wind oxidation coating, the 3rd controls sensing element, mixing device; The suction port of described weary wind delivery connection device is connected respectively by the air outlet of pipeline with weary wind components of assays, mixing device, and its air outlet is connected with the suction port of weary wind oxidation coating; Described the 3rd import controlling sensing element is connected with the outlet of high concentration gas pre-treater; The suction port of described mixing device is connected respectively by the air outlet of pipeline and weary wind components of assays, the 3rd air outlet controlling sensing element;
Described Heat Treatment subtense angle comprises UTILIZATION OF VESIDUAL HEAT IN circulation means, the first exhaust heat boiler, steam turbine and generator; Described UTILIZATION OF VESIDUAL HEAT IN circulation means is connected by pipeline with the first exhaust heat boiler, steam turbine respectively; The high-temperature flue gas import of the first described exhaust heat boiler to export with the high-temperature flue gas of high concentration jet dynamic control, low-concentration fuel generator set respectively by pipeline and is connected; The main shaft of described generator is connected with the main shaft of steam turbine, and generator is connected with electrical network by cable.
Above-mentioned coal mine gas comprehensive application system, wherein, described UTILIZATION OF VESIDUAL HEAT IN circulation means comprises the second exhaust heat boiler, solenoid valve, superheater condenser, condensation tank and feed water pump; The suction port of described solenoid valve is connected with the air outlet of superheater and the suction port of steam turbine by pipeline respectively with air outlet; The suction port of described condenser is connected with the outlet of steam turbine by pipeline; The two ends import of described condensation tank is connected with the outlet of condenser, the outlet of the first exhaust heat boiler respectively by deferent; The water intake of described feed water pump is connected with the outlet of condensation tank by pipeline, and feedwater delivery side of pump is connected with the first import of the second exhaust heat boiler; Second import of the second described exhaust heat boiler is connected by pipeline with the outlet of weary wind oxidation coating.
Above-mentioned coal mine gas comprehensive application system, wherein, also comprise the first control sensing element in described mine air-lack processing subsystem, the first described sensing element comprises the first mortor operated valve, the first solenoid valve, first-hand brake control valve and first sensor; The first described mortor operated valve, the first solenoid valve, first-hand brake control valve and first sensor are successively set on the pipeline between the outlet of weary wind oxidation coating and the import of the second exhaust heat boiler; The intake grill of the first described mortor operated valve is connected by pipeline with the outlet of described weary wind oxidation coating, and the outlet of described first sensor is connected by second import of pipeline with the second described exhaust heat boiler.
Above-mentioned coal mine gas comprehensive application system, wherein, the described the 3rd controls sensing element comprises the 3rd mortor operated valve, the 3rd solenoid valve, the 3rd hand control valve and the 3rd sensor; The 3rd described mortor operated valve, the 3rd solenoid valve, the 3rd hand control valve and the 3rd sensor are successively set on the pipeline between the outlet of high concentration gas pre-treater and mixing device, and the import of the 3rd described mortor operated valve is connected by pipeline with the outlet of high concentration gas pre-treater; The outlet of the 3rd described sensor is connected with the import of mixing device by pipeline.
Above-mentioned coal mine gas comprehensive application system, wherein, described weary wind delivery connection device comprises the conveying of weary wind connecting tube, exhaust stack and sliding door; The suction port of described weary wind conveying connecting tube is connected with the air outlet of weary wind components of assays, mixing device respectively, and weary wind carries the air outlet of connecting tube and weary wind oxidation coating) suction port be connected; The side, middle part that described exhaust stack is arranged on conveying connecting tube stretches out, and inner chamber and the exhaust stack inner chamber of weary wind conveying connecting tube connect; Described sliding door is arranged on the position of giving vent to anger of exhaust stack and weary wind conveying connecting tube, and this sliding door can control mobile at this position; The air outlet of this sliding door and exhaust stack and weary wind carry the air outlet of connecting tube suitable.
Above-mentioned coal mine gas comprehensive application system, wherein, also comprises the second control sensing element in described Heat Treatment subtense angle, described second controls sensing element comprises the second mortor operated valve, the second solenoid valve, second-hand's brake control valve and the second sensor; The second described mortor operated valve, the second solenoid valve, second-hand's brake control valve and the second sensor are successively set on the pipeline between high concentration jet dynamic control, the outlet of low-concentration fuel generator set and the first exhaust heat boiler; The import of the second described mortor operated valve is exported with the high-temperature flue gas of high concentration jet dynamic control, low-concentration fuel generator set respectively by pipeline and is connected; The high-temperature flue gas outlet of the second described sensor is connected with the high-temperature flue gas import of the first exhaust heat boiler by pipeline.
Above-mentioned coal mine gas comprehensive application system, wherein, described Heat Treatment subtense angle also comprises manual control part; Described manual control part comprises the 4th hand control valve, the 5th hand control valve, the 6th hand control valve and the 7th hand control valve; The import of the 4th described hand control valve is softened water pipe with the external world and is connected; The 6th described hand control valve is arranged on the 4th pipeline between hand control valve and condensation tank; The 5th described hand control valve is arranged on the pipeline between the outlet of the 4th hand control valve and the second import of the first exhaust heat boiler; The 7th described hand control valve is arranged on the pipeline between the outlet of the first exhaust heat boiler and the 6th hand control valve.
Adopt an Application way for above-mentioned coal mine gas comprehensive application system, be characterized in, this Application way comprises following steps:
Step 1, the gas of coal mine gas drainage pump house extraction;
Step 2, the gas density that coal mine gas components of assays measures, if gas density concentration is greater than 30%, introduces high concentration gas processing subsystem by pipeline, if gas density is greater than 5% be less than 30%, is incorporated into low concentration gas processing subsystem by pipeline; The gas density that mine air-lack components of assays measures, if gas density is less than 0.7%, is incorporated into mine air-lack processing subsystem by pipeline;
Step 2.1, the high-temperature flue gas that the chemical energy of gas becomes electric energy to be connected to the grid to produce by high concentration gas processing subsystem simultaneously, enters Heat Treatment subtense angle;
Step 2.2, the chemical energy of gas becomes electric energy to be connected to the grid to produce high-temperature flue gas simultaneously, enter Heat Treatment subtense angle by low concentration gas processing subsystem;
Step 2.3, weary wind is oxidized to high-temperature flue gas by mine air-lack processing subsystem, enters Heat Treatment subtense angle;
Step 3, the high-temperature flue gas of the generation of gas is changed into electric energy and is connected to the grid by Heat Treatment subtense angle.
Step 4, after the low-temperature flue gas that coal mine gas comprehensive application system produces measures low-temperature flue gas concentration, flow by densitometer, flowmeter, by emptying from chimney for free of contamination clean gas.
The Application way of above-mentioned coal mine gas comprehensive application system, wherein, also comprises following steps in described step 2.1:
Step 2.1.1, high concentration gas dewaters dedusting by high concentration gas pre-treater;
Step 2.1.2, gas chemical energy is become electric energy by high concentration gas jet dynamic control.
Also following steps are comprised in described step 2.2:
Step 2.2.1, security conveyer conveying low concentration gas;
Step 2.2.2, low concentration gas dewaters dedusting by low concentration gas pre-treater;
Step 2.2.3, gas chemical energy is become electric energy by low concentration gas jet dynamic control.
Described step 2.3 comprises following steps:
Step 2.3.1 mine air-lack directly sends into weary wind oxidation coating by weary wind delivery connection device, and oxidation produces high-temperature flue gas, and enter the second exhaust heat boiler, the flue gas of low temperature is discharged by chimney.
Step 2.3.2 when gas concentration lower than 0.25% time, mixing device is by mine air-lack and high concentration gas blending;
The methane gas of step 2.3.3 blending is sent into weary wind oxidizer oxidizes by weary wind delivery connection device and is produced high-temperature flue gas, and enter the second exhaust heat boiler, the flue gas of low temperature is discharged by chimney.
The Application way of above-mentioned coal mine gas comprehensive application system, wherein, also comprises following steps in described step 3:
Step 3.1 second controls sensing element and regulates the high-temperature flue gas amount entering the first exhaust heat boiler;
Step 3.2 manual control part supplements or intensification softened water;
The heat energy of step 3.3 UTILIZATION OF VESIDUAL HEAT IN circulation means promotes steam turbine work done, and drive electrical generators produces electric energy;
After the acting of step 3.4 steam turbine, remaining lower pressure steam enters condenser, condenses into after water enters condensation tank, feed water pump is boosted, again enters the second exhaust heat boiler circulating generation.
Described step 3.1 also comprises following steps:
Step 3.1.1, the high-temperature flue gas that high concentration jet dynamic control, low-concentration fuel generator set generate, the second mortor operated valve of sensing element, the second solenoid valve, second-hand's brake control valve and the second sensor is controlled, the concentration of the second sensor display high-temperature flue gas and flow number through second;
Step 3.1.2 regulates the second mortor operated valve, the second solenoid valve, if when both lost efficacy adjustable second-hand's brake control valve, regulate the high-temperature flue gas amount of the first exhaust heat boiler of entering, guarantee the normal operation of the first exhaust heat boiler.
Described step 3.2 also comprises following steps:
Step 3.2.1, opens the 4th hand control valve, the 6th hand control valve, closes the 5th hand control valve, the 7th hand control valve simultaneously, makes outside softened water enter condensation tank, supplements the water yield that the generating of waste heat circulation device consumes;
Step 3.2.2, opens the 4th hand control valve, the 5th hand control valve simultaneously, closes the 6th hand control valve, after making softened water enter the first exhaust heat boiler intensification, open the 7th hand control valve, enter condensation tank, amount of makeup water, the feed water pump that enters filled of nourishing boosts.
Described step 3.3 also comprises following steps:
Step 3.3.1, the high-temperature flue gas that weary wind oxidation coating produces controls the first sensor of sensing element by first, the concentration of display high-temperature flue gas and flow, regulate motor-operated control valve, solenoid valve, if the adjustable hand brake control valve when both lost efficacy, regulate the high-temperature flue gas amount entering the second exhaust heat boiler, ensure that the second exhaust heat boiler normally runs;
Step 3.3.2, the second exhaust heat boiler reclaims heat and generates superheated vapor, and promote steam turbine acting, drive electrical generators produces electric energy, is connected to the grid, and achieves energy recovery and utilizes.
Compared with prior art, the advantage had is for coal mine gas comprehensive application system of the present invention and Application way thereof:
1, the present invention can be used for taking different process routes and different Application way thereof to the coal mine gas of variable concentrations in colliery, whole coal mine gases is realized comprehensive utilization, improve gas pumping rate, ensure Safety of Coal Mine Production, make the utilization ratio of whole coal mine gas reach maximization, promote Coal Industry Sustainable Development.
2, the present invention is owing to being provided with pre-treater, the water in gas and contaminant filter can be fallen, and the gas of discharging dry cleansing utilizes further.
3, the present invention owing to being provided with weary wind delivery connection device in mine air-lack processing subsystem, by regulating sliding door can control the conveying of weary wind, guarantees weary wind delivery safety.When weary wind oxidation coating is shut down, open diffusion mouth, avoid the enrichment of conveying connecting tube gas dangerous.
4, the present invention owing to being provided with weary wind oxidation coating in mine air-lack processing subsystem; Process coal mine to ventilate mash gas, decreases the discharge of greenhouse gases to the full extent, realizes the target of carbon emission reduction.
5, the present invention is owing to being provided with UTILIZATION OF VESIDUAL HEAT IN subtense angle, and by the combustion gas of UTILIZATION OF VESIDUAL HEAT IN circulation and stress, heat unnecessary when generator set and weary wind oxidation coating run, for all system provides from electricity consumption, reduces the consumption of energy, realize the maximum using of coal mine gas.
6, armamentarium of the present invention implements overall monitor by components of assays, sensing control parts, and automaticity is high, has ensured safety and steady operation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of coal mine gas comprehensive application system of the present invention;
Fig. 2 is the flow chart that the present invention adopts the Application way of colliery comprehensive application system.
Embodiment
Adopt the embodiment of the Application way of colliery comprehensive application system to be further elaborated to the present invention below in conjunction with Fig. 1, Fig. 2.
Shown in Figure 1, coal mine gas comprehensive application system comprises coal mine gas components of assays 1, mine air-lack components of assays 8, high concentration gas processing subsystem 2, low concentration gas processing subsystem 3, mine air-lack processing subsystem 4, Heat Treatment subtense angle 5, flowmeter 71, densitometer 72.The inlet opening of coal mine gas components of assays 1 is connected by the exhaust outlet of pipeline with coal mine gas drainage pump house;
Coal mine gas components of assays 1 comprises densitometer 11, flowmeter 12, thermometer 13, pressure gauge 14 and hand control valve 15; Be successively set on pipeline.
The inlet opening of mine air-lack components of assays 8 is connected by the exhaust outlet of pipeline with coalmine ventilation tunnel;
Mine air-lack components of assays 8 comprises densitometer 81, flowmeter 82, thermometer 83, pressure gauge 84 and hand control valve 85; Be successively set on pipeline.
High concentration gas processing subsystem 2 comprises high concentration gas pre-treater 21, high concentration jet dynamic control 22.Adopt the equipment such as the built-in dehumidifying filter of high concentration gas pre-treater 21, condenser, blower fan, the dust removal filter composition of prior art, by comprising connecting tube, valve, instrumentation and regulating and controlling equipment.High concentration gas is introduced dehumidifying filter, by its dehumidifying dehydrating function, reduce the moisture content in gas, by blower fan, methane gas is pressurizeed.Again through condenser, the condenses in gas is separated out, eventually passes dust removal filter, reduce fuel gas and dust impurity content, enter high concentration jet dynamic control 22.High concentration jet dynamic control 22 adopts G3520 type, and high concentration jet dynamic control 22 comprises connecting rod, distribution device, supply system, lubrication system, cooling system, ignition system, pneumatic system and electronic governing system; High concentration jet dynamic control working procedure is made up of air inlet, compression, burning expansion and exhaust Four processes, and when each work cycle completes, piston reciprocating twice, crank rotate two weeks.
The suction port of high concentration gas pre-treater 21 is connected by pipeline with the outlet of mine air-lack components of assays 8, the suction port of high concentration jet dynamic control 22 is connected by the air outlet of pipeline with high concentration gas pre-treater 21, and the power end of high concentration jet dynamic control 22 is connected with the high voltage variable electronic box of electrical network 6 by cable; High concentration jet dynamic control 22 electricity is incorporated to national grid.
Low concentration gas processing subsystem 3 comprises security conveyer 31, low concentration gas pre-treater 32, low-concentration fuel generator set 33; The model adopting the security conveyer 31 of prior art is AQ200, security conveyer 31 comprises front end voltage stabilizing exhaust stack, water sealing type fire retardant blowout device, post stream device, circulating device, front end observation tube, rear end observation tube, gas and water separator, rear end voltage stabilizing exhaust stack, bidirectional flame arrester and circulating water pool composition, the low concentration gas gone out from colliery extraction enters front end voltage stabilizing exhaust stack by total steam outlet pipe connection, carry out superpressure to diffuse, the water sealing type fire retardant blowout device arranged, prevents gas from exploding; Low concentration gas enters into post stream device, produces intermittent loose water body plug flow, the low concentration gas flowed in gas conveyer tube is divided into segment, and when avoiding the tempering of gas utilization facility, flame enters low concentration gas delivery line and produces catastrophe; Enter into circulating device, current are flowed along the inwall of conveyance conduit, in gas course of conveying, the inwall of conveyance conduit forms moisture film, circulation moisture film can spread in pipeline by the burning things which may cause a fire disaster effectively blocked in conveyance conduit external environment condition, avoids, in pipeline, catastrophe occurs; Gas through front end, rear end observation tube, check flowing gas state; Enter moisture trap, play dehydration, gas be separated with water, water is introduced by pipeline and is looped back pond, and gas then enters rear end voltage stabilizing exhaust stack, carries out superpressure and diffuses; The bidirectional flame arrester arranged prevents tempering, is connected low concentration gas pneumatic transmission is entered low concentration gas pre-treater 32 by pipeline.The built-in dehumidifying filter of low concentration gas pre-treater 32 of prior art, baffle plate, filter screen.Low concentration gas is introduced mechanical type dehumidifying filter, by its dehumidifying dehydrating function, moisture gas runs into after baffle plate intercepts and is separated, reduce the moisture content in gas, eventually pass filter screen, reduce gaseous impurity content, enter low-concentration fuel generator set 33.The low-concentration fuel generator set 33 of prior art adopts GFI500 type, and this unit comprises connecting rod, distribution device, supply system, lubrication system, cooling system, ignition system, pneumatic system and electronic governing system; High concentration jet dynamic control working procedure is made up of air inlet, compression, burning expansion and exhaust Four processes, and when each work cycle completes, piston reciprocating twice, crank rotate two weeks.
The suction port of security conveyer 31 is connected by pipeline with the outlet of components of assays, low concentration gas pre-treater 32 suction port is connected by the air outlet of pipeline with security conveyer 31, and low-concentration fuel generator set 33 suction port is connected by the air outlet of pipeline with low concentration gas pre-treater 21; The power end of described low-concentration fuel generator set 33 is connected with the high voltage variable electronic box of electrical network 6 by cable; Low-concentration fuel generator set 22 electricity is incorporated to national grid.
The weary wind oxidation coating 42 that mine air-lack processing subsystem 4 comprises mixing device 45, weary wind delivery connection device 46, model are RNV100.The suction port of described mixing device 45 controls the air outlet of sensing element 44, the air outlet of weary wind components of assays 8 with air outlet respectively by pipeline and the 3rd and is connected with the suction port of weary wind delivery connection device 46.Gas distributor is provided with in described mixing device 45, distributor in mixing device 45 is entered when high concentration gas gas controls sensing element 44 by the 3rd, ambient gas is driven to react in short distance, mix with the mine air-lack in the air outlet pipeline of weary wind components of assays 8 is full and uniform, the gas after blending enters weary wind delivery connection device 46.
Weary wind delivery connection device comprises the conveying of weary wind connecting tube 461, exhaust stack 462, sliding door 463.The suction port of weary wind conveying connecting tube 461 and air outlet respectively with the air outlet of weary wind components of assays 8, mixing device 45, the suction port of weary wind oxidation coating 42 is connected; The side, middle part that described exhaust stack 462 is arranged on weary wind conveying connecting tube 461 stretches out, and weary wind conveying connecting tube 461 inner chamber and exhaust stack 462 inner chamber connect.Sliding door 463 is arranged on one end of the air outlet of exhaust stack 462, carries the air outlet of connecting tube 461 suitable with the air outlet of exhaust stack 462 and weary wind.Gas after mine air-lack, blending enters weary wind conveying connecting tube 461; control sliding door 463 and close diffusion mouth; directly enter weary wind oxidation coating 42 by the air outlet of weary wind connection set; when weary wind oxidation coating 42 is shut down; opening diffusion mouth by controlling sliding door 463, avoiding the enrichment of conveying connecting tube gas dangerous.
Weary wind oxidation coating 42 comprises frame, control system, honeycomb heat accumulation ceramic disk, electric heater, built-in heat exchanger, suction tude, steam outlet pipe, intake pipe, outlet pipe and ceramic thermal insulation; Its control system is made up of control unit, temperature transducer, sensing methane concentration device and electric valve etc.; All the sensors and electric valve have signal conductor to be connected with control unit, mine air-lack enters weary wind oxidation coating 42 by weary wind delivery connection device 46, first use a small amount of electric energy heating starting, electric heating is stopped after reaching methane oxidation temperature, methane in weary wind continues oxidation reaction, generates carbon dioxide and produces heat energy.This device cracking trace methane, reclaim cracking produce heat, minimizing coal mine gas cause greenhouse effect while, realize the recycling of the energy.
Heat Treatment subtense angle 5 comprises UTILIZATION OF VESIDUAL HEAT IN circulation means 51, first exhaust heat boiler 52 steam turbine 56 and generator 53; Steam turbine 56 is the condensed steam type steam turbine of prior art, and this machine is made up of static cascade and moving blades, and steam enters vapour condenser, condenses in lower than barometric pressure situation, and pushing generator does work; First exhaust heat boiler of prior art comprises drum, movable gas hood, fire door section flue, oblique 1 section of flue, oblique 2 sections of flues, 1 section, end flue, 2 sections, end flue, feed pipe (blanking chute) groove, oxygen muzzle, nitrogen seal device and nitrogen blockings, manhole, differential pressure pressure obtaning device, the bearing of flue and suspension bracket.Exhaust heat boiler is divided into six circulation loops, each circulation loop is made up of falling tube and asending pipe, the feedwater of each section of flue enters each heating surface from drum to be incorporated into the lower header of each flue by falling tube after, water enters import header by producing steam after heating surface, then introduces drum by asending pipe.
UTILIZATION OF VESIDUAL HEAT IN circulation means 51 is connected by pipeline with the first exhaust heat boiler 52; The high-temperature flue gas import of the first exhaust heat boiler 52 to export with the high-temperature flue gas of high concentration jet dynamic control 22, low-concentration fuel generator set 33 respectively by pipeline and is connected; The main shaft of generator 53 is connected with the main shaft of steam turbine 56, and the power end of generator 53 is connected with the high voltage variable electronic box of electrical network 6 by cable.
UTILIZATION OF VESIDUAL HEAT IN circulation means 51 comprises the second exhaust heat boiler 511, solenoid valve 512, superheater 513 condenser 514, condensation tank 515 and feed water pump 516;
The suction port of solenoid valve 512 is connected with the air outlet of superheater 513 and the suction port of steam turbine 56 by pipeline respectively with air outlet, the suction port of condenser 514 is connected with the outlet of steam turbine 56 respectively by pipeline, the two ends import of condensation tank 515 is respectively by the outlet of deferent and condenser 514, the outlet of the first exhaust heat boiler 52 connects, the water intake of feed water pump 516 is connected by the outlet of pipeline with condensation tank 515, the outlet of feed water pump 516 is connected with the first import 511a of the second exhaust heat boiler 511, second import 511b of the second exhaust heat boiler 511 is connected by pipeline with the outlet of weary wind oxidation coating 42.
The first control sensing element 43 is also comprised in mine air-lack processing subsystem 4; First sensing element 43 comprises the first mortor operated valve 431, first solenoid valve 432, first-hand brake control valve 433 and first sensor 434; First mortor operated valve 431, first solenoid valve 432, first-hand brake control valve 433 and first sensor 434 are successively set on the pipeline between the outlet of weary wind oxidation coating 42 and the import of the second exhaust heat boiler 511.
The second control sensing element 54 and manual control part 55 is also comprised in Heat Treatment subtense angle 5;
Second import controlling sensing element 54 is exported with 500 DEG C of high-temperature flue gas of high concentration jet dynamic control 22, low-concentration fuel generator set 33 respectively by pipeline and is connected;
Second controls sensing element 54 comprises the second mortor operated valve 541, second solenoid valve 542, second-hand's brake control valve 543 and the second sensor 544; Second mortor operated valve 541, second solenoid valve 542, second-hand's brake control valve 543 and the second sensor 544 are successively set on high concentration jet dynamic control 22, the high-temperature flue gas of low-concentration fuel generator set 33 exports on the pipeline between the first exhaust heat boiler 52, and the outlet of the second sensor 544 is connected with 800 DEG C of high-temperature flue gas imports of the first exhaust heat boiler 52 by pipeline.
Also comprise the 3rd in weary wind processing subsystem 4 and control sensing element 44; 3rd import controlling sensing element 44 is exported with high concentration gas pre-treater 21 respectively by pipeline and is connected; Described the 3rd controls sensing element 44 comprises the 3rd mortor operated valve 441, the 3rd solenoid valve 442, the 3rd hand control valve 443 and the 3rd sensor 444; The 3rd described mortor operated valve 441, the 3rd solenoid valve 442, the 3rd hand control valve 443 and the 3rd sensor 444 are successively set on the pipeline between the outlet of high concentration gas pre-treater 21 and mixing device, and the outlet of the 3rd sensor 444 is connected by the import of pipeline with mixing device 45.
Manual control part 55 comprises the 4th hand control valve 551, the 5th hand control valve 552, the 6th hand control valve 553 and the 7th hand control valve 554, manual control part 55 is arranged between condensation tank 515 and the first exhaust heat boiler 52, carry out softened water with the external world to supplement, the 5th hand control valve 552 is put and is exported between the import of the first exhaust heat boiler 52 at the 4th hand control valve 551 simultaneously.
Densitometer 72 import is connected respectively by the outlet of pipeline with weary wind oxidation coating 42, first exhaust heat boiler 52, and the inlet/outlet of flowmeter 71 is connected with chimney 7 with the outlet of densitometer 72 respectively.
By adopting the devices such as high concentration jet dynamic control 22, low-concentration fuel generator set 33, weary wind oxidation coating 42, first exhaust heat boiler 52, steam turbine 56 that coal gas is carried out circulating generation in this system.While minimizing coal mine gas institute causes greenhouse effect, realize discarding the recycling of the energy.
Below in conjunction with Fig. 1 and Fig. 2, introduce the Application way of coal mine gas comprehensive application system of the present invention.
Step 1 is by coal mine gas drainage pump house gas extraction.
Coal mine gas from the extraction of coal mine gas drainage pump house is sent into coal mine gas components of assays 1 by step 2, the parameter such as concentration, flow of coal mine gas is demonstrated according to the densitometer 11 of coal mine gas components of assays 1, flowmeter 12, thermometer 13, pressure gauge 14, the air inflow of the gas manually in control valve 15 regulating equipment, if gas density concentration is greater than 30%, introduces high concentration gas processing subsystem 2 by pipeline, if gas density is greater than 5% be less than 30%, be incorporated into low concentration gas processing subsystem 3 by pipeline.
The high-temperature flue gas that gas chemical energy becomes electric energy to be connected to the grid to produce by step 2.1 high concentration gas processing subsystem 1 simultaneously, enters Heat Treatment subtense angle 5.
Step 2.1.1 high concentration gas enters the evolution such as high concentration gas pre-treater 21 carries out dewatering, dedusting; If necessary the high concentration gas gas after purified treatment is sent into natural gas line, supply nearby residents uses.
Pretreated high concentration gas is changed into electric energy by step 2.1.2 high concentration jet dynamic control 22, and generating is connected to the grid, and the high-temperature flue gas of generation enters the first exhaust heat boiler 52 of Heat Treatment subtense angle 5.
The high-temperature flue gas that gas chemical energy becomes electric energy to be connected to the grid to produce by step 2.2 low concentration gas processing subsystem 3 simultaneously, enters Heat Treatment subtense angle 5.
Step 2.2.1 low concentration gas enters low concentration gas pre-treater 32 by security conveyer 31.
Low concentration gas dewaters dedusting by step 2.2.2 low concentration gas pre-treater 32, low concentration gas is introduced low-concentration fuel generator set 32.
Low concentration gas is changed into electric energy and is connected to the grid by step 2.2.3 low-concentration fuel generator set 32, produces high-temperature flue gas simultaneously, enters the first exhaust heat boiler 52 of Heat Treatment subtense angle 5.
Mine air-lack from coalmine ventilation tunnel is sent into mine air-lack components of assays 8 by step 2.3, the parameter such as concentration, flow of mine air-lack is demonstrated according to the densitometer 81 of mine air-lack components of assays 8, flowmeter 82, thermometer 83, pressure gauge 84, the air inflow of the weary wind manually in control valve 85 regulating equipment, weary wind concentration being less than 0.7% is incorporated into mine air-lack processing subsystem 4 by pipeline.
Weary wind is oxidized to high-temperature flue gas by mine air-lack processing subsystem 4, enters Heat Treatment subtense angle 5.
Step 2.3.1, when mine air-lack concentration is more than 0.25%, when reaching oxidation coating operating condition, directly can enters weary wind oxidation coating 42 by weary wind delivery connection device 46 and carry out oxidation reaction;
Step 2.3.2 when mine air-lack concentration lower than 0.25% time, mixing device 45 is by mine air-lack and high concentration gas blending; The 3rd mortor operated valve 441 of sensing element 44, the 3rd solenoid valve 442, the 3rd manually operated valve 443 and the 3rd sensor 444 is controlled according to the 3rd, 3rd sensor 444 shows the numerical value such as concentration and flow of high concentration gas gas, regulate the 3rd mortor operated valve 441, the 3rd solenoid valve 442, when both lost efficacy, regulate the 3rd hand control valve 443, regulate the high concentration gas gas flow entering mixing device 45, ensure blending gas uniform, reach oxidation coating operating condition, the gas after blending enters weary wind oxidation coating 42 by weary wind delivery connection device 46.
Step 2.3.3 weary general mood body is subject to thermal oxidation in weary wind oxidation coating 42, Pintsch process, reaction generate carbon dioxide and water enters air discharge: the high-temperature flue gas producing 800 DEG C under normal operation state is drawn from relief opening, enters the second exhaust heat boiler 511 of waste heat circulation device 51.
The high-temperature flue gas that gas produces is changed into electric energy and is connected to the grid by step 3 Heat Treatment subtense angle 5.
Step 3.1 second controls sensing element 54 and regulates the high-temperature flue gas amount entering the first exhaust heat boiler 52.
The high-temperature flue gas that step 3.1.1 high concentration jet dynamic control 22,33 groups, low-concentration fuel generator generate, control the second mortor operated valve 541, second solenoid valve 542 of sensing element 55, second-hand's brake control valve 543 and the second sensor 544, second sensor 544 through second and show the numerical value such as the concentration of high-temperature flue gas and flow.
Step 3.1.2 regulates the second mortor operated valve 441, second solenoid valve 442, when both lost efficacy, regulates second-hand's brake control valve 443, and regulates the high-temperature flue gas amount entering the first exhaust heat boiler 52, ensure that the first exhaust heat boiler 511 normally runs.Produce superheated vapor by the first exhaust heat boiler 52, carry out heat exchange recovery, produce the softened water that temperature is higher, enter condensation tank 515, enter waste heat circulation device 51.
Step 3.2 manual control part supplements or intensification softened water.
Step 3.2.1 opens the 4th hand control valve 551, closes the 5th hand control valve 552 simultaneously, makes outside softened water enter condensation tank 515, supplements the water yield that waste heat circulation device 51 generating consumes.
Step 3.2.2 opens the 4th hand control valve 551, the 5th hand control valve 552 simultaneously, after making softened water enter the first exhaust heat boiler 52 intensification, open the 6th hand control valve 553, the 7th hand control valve 554, enter condensation tank 515, amount of makeup water, enters feed water pump 516 and boosts.
The heat energy of step 3.3 UTILIZATION OF VESIDUAL HEAT IN circulation means 51 promotes steam turbine 56 work done, and drive electrical generators 53 produces electric energy.
The high-temperature flue gas that the weary wind oxidation coating 42 of step 3.3.1 produces controls the first sensor 434 of sensing element 43 by first, the concentration of display high-temperature flue gas and flow, regulate the first motor-operated control valve 431, first solenoid valve 432, the adjustable first-hand brake control valve 433 when both lost efficacy, regulate the high-temperature flue gas amount entering the second exhaust heat boiler, ensure that the second exhaust heat boiler 511 normally runs.
Step 3.3.2 second exhaust heat boiler 511 reclaims heat and generates superheated vapor, and promote steam turbine 513 and do work, drive electrical generators 53 produces electric energy, is connected to the grid, and achieves energy recovery and utilizes.
Lower pressure steam remaining after step 3.4 steam turbine 56 does work enters condenser 514, condenses into after water enters condensation tank 515, feed water pump 516 is boosted, again enters the second exhaust heat boiler 511 circulating generation.
After the low-temperature flue gas that step 4 coal mine gas comprehensive application system produces measures low-temperature flue gas concentration, flow by densitometer 72, flowmeter 71, free of contamination low-temperature flue gas is emptying from chimney 7.
In sum, the present invention adopts the Application way of colliery comprehensive application system different process routes can be used to carry out different Application way to the coal mine gas of the variable concentrations from mine collection, fully utilize, make the utilization ratio of whole coal mine gas reach maximization.Wherein, coal mine gas utilization ratio reaches more than 98%, and weary wind utilization ratio reaches more than 96%, and comprehensive utilization ratio reaches more than 97%.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a coal mine gas comprehensive application system, it is characterized in that, this application system comprises mine air-lack components of assays (8), coal mine gas components of assays (1), high concentration gas processing subsystem (2), low concentration gas processing subsystem (3), mine air-lack processing subsystem (4) and Heat Treatment subtense angle (5);
The inlet opening of described coal mine gas components of assays (1) is connected by the exhaust outlet of pipeline with coal mine gas drainage pump house;
The inlet opening of described mine air-lack components of assays (8) is connected by the exhaust outlet of pipeline with coalmine ventilation tunnel;
Described high concentration gas processing subsystem (2) comprises high concentration gas pre-treater (21), high concentration jet dynamic control (22); The suction port of described high concentration gas pre-treater (21) is connected by pipeline with the outlet of coal mine gas components of assays (1), the suction port of high concentration jet dynamic control (22) is connected by the air outlet of pipeline with high concentration gas pre-treater (21), and the power end of described high concentration jet dynamic control (22) is connected with electrical network (6) by cable;
Described low concentration gas processing subsystem (3) comprises security conveyer (31), low concentration gas pre-treater (32), low-concentration fuel generator set (33); The suction port of described security conveyer (31) is connected by pipeline with the outlet of coal mine gas components of assays (1), low concentration gas pre-treater (32) suction port is connected by the air outlet of pipeline with security conveyer (31), and low-concentration fuel generator set (33) suction port is connected by the air outlet of pipeline with low concentration gas pre-treater (21); The power end of described low-concentration fuel generator set (33) is connected with electrical network (6) by cable;
Described mine air-lack processing subsystem (4) comprises weary wind delivery connection device (46), weary wind oxidation coating (42), mine air-lack control sensing element (44), mixing device (45); The suction port of described weary wind delivery connection device (46) is connected respectively by the air outlet of pipeline with weary wind components of assays (8), mixing device (45), and its air outlet is connected with the suction port of weary wind oxidation coating (42); The import that described mine air-lack controls sensing element (44) is connected with the outlet of high concentration gas pre-treater (21); The air outlet that the suction port of described mixing device (45) controls sensing element (44) respectively by the air outlet of pipeline and weary wind components of assays (8), mine air-lack is connected;
Described Heat Treatment subtense angle (5) comprises UTILIZATION OF VESIDUAL HEAT IN circulation means (51), the first exhaust heat boiler (52), steam turbine (56) and generator (53); Described UTILIZATION OF VESIDUAL HEAT IN circulation means (51) is connected by pipeline with the first exhaust heat boiler (52), steam turbine (56) respectively; The high-temperature flue gas import of described the first exhaust heat boiler (52) to export with the high-temperature flue gas of high concentration jet dynamic control (22), low-concentration fuel generator set (33) respectively by pipeline and is connected; The main shaft of described generator (53) is connected with the main shaft of steam turbine (56), and generator (53) is connected with electrical network (6) by cable.
2. coal mine gas comprehensive application system according to claim 1, it is characterized in that, described UTILIZATION OF VESIDUAL HEAT IN circulation means (51) comprises the second exhaust heat boiler (511), solenoid valve (512), superheater (513) condenser (514), condensation tank (515) and feed water pump (516);
The suction port of described solenoid valve (512) is connected with the air outlet of superheater (513) and the suction port of steam turbine (56) by pipeline respectively with air outlet; The suction port of described condenser (514) is connected by the outlet of pipeline with steam turbine (56);
The two ends import of described condensation tank (515) is connected with the outlet of condenser (514), the outlet of the first exhaust heat boiler (52) respectively by pipeline; The water intake of described feed water pump (516) is connected by the outlet of pipeline with condensation tank (515), and the outlet of feed water pump (516) is connected with first import (511a) of the second exhaust heat boiler (511); Second import (511b) of described the second exhaust heat boiler (511) is connected by pipeline with the outlet of weary wind oxidation coating (42).
3. coal mine gas comprehensive application system according to claim 1, it is characterized in that, also comprise the first control sensing element (43) in described mine air-lack processing subsystem (4), described first controls sensing element comprises the first mortor operated valve (431), the first solenoid valve (432), first-hand brake control valve (433) and first sensor (434);
Described the first mortor operated valve (431), the first solenoid valve (432), first-hand brake control valve (433) and first sensor (434) are successively set on the pipeline between the outlet of weary wind oxidation coating (42) and the import of the second exhaust heat boiler (511); The intake grill of described the first mortor operated valve (431) is connected by pipeline with the outlet of described weary wind oxidation coating (42), and the outlet of described first sensor (434) is connected by second import (511b) of pipeline with described the second exhaust heat boiler (511).
4. coal mine gas comprehensive application system according to claim 1, it is characterized in that, described mine air-lack controls sensing element (44) and comprises the 3rd mortor operated valve (441), the 3rd solenoid valve (442), the 3rd hand control valve (443) and the 3rd sensor (444);
The 3rd described mortor operated valve (441), the 3rd solenoid valve (442), the 3rd hand control valve (443) and the 3rd sensor (444) are successively set on the pipeline between the outlet of high concentration gas pre-treater (21) and mixing device (45), and the import of the 3rd described mortor operated valve (441) is connected by pipeline with the outlet of high concentration gas pre-treater (21); The outlet of the 3rd described sensor (444) is connected by the import of pipeline with mixing device (45).
5. coal mine gas comprehensive application system according to claim 1, is characterized in that, described weary wind delivery connection device (46) comprises weary wind conveying connecting tube (461), exhaust stack (462) and sliding door (463);
The suction port of described weary wind conveying connecting tube (461) is connected with the air outlet of weary wind components of assays (8), mixing device (45) respectively, and the air outlet of weary wind conveying connecting tube (461) is connected with the suction port of weary wind oxidation coating (42);
The side, middle part that described exhaust stack (462) is arranged on weary wind conveying connecting tube (461) stretches out, and inner chamber and exhaust stack (462) inner chamber of weary wind conveying connecting tube (461) connect; Described sliding door (463) is arranged on the position of giving vent to anger of exhaust stack (462) and weary wind conveying connecting tube (461), and this sliding door (463) can control mobile at this position; Air outlet and the weary wind of this sliding door (463) and exhaust stack (462) carry the air outlet of connecting tube suitable.
6. coal mine gas comprehensive application system according to claim 1, it is characterized in that, also comprise the second control sensing element (54) in described Heat Treatment subtense angle (5), described second controls sensing element (54) comprises the second mortor operated valve (541), the second solenoid valve (542), second-hand's brake control valve (543) and the second sensor (544);
Described the second mortor operated valve (541), the second solenoid valve (542), second-hand's brake control valve (543) and the second sensor (544) are successively set on the pipeline between high concentration jet dynamic control (22), the outlet of low-concentration fuel generator set (33) and the first exhaust heat boiler (52);
The import of described the second mortor operated valve (541) is exported with the high-temperature flue gas of high concentration jet dynamic control (22), low-concentration fuel generator set (33) respectively by pipeline and is connected; The high-temperature flue gas outlet of described the second sensor (544) is connected by the high-temperature flue gas import of pipeline with the first exhaust heat boiler (52).
7. coal mine gas comprehensive application system according to claim 1, is characterized in that, described Heat Treatment subtense angle (5) also comprises manual control part (55); Described manual control part (55) comprises the 4th hand control valve (551), the 5th hand control valve (552), the 6th hand control valve (553) and the 7th hand control valve (554);
The import of the 4th described hand control valve (551) is softened water pipe with the external world and is connected; The 6th described hand control valve (553) is arranged on the pipeline between the 4th hand control valve (551) and condensation tank (515); The 5th described hand control valve (552) is arranged on the pipeline between the outlet of the 4th hand control valve (551) and the second import of the first exhaust heat boiler (52); The 7th described hand control valve (554) is arranged on the pipeline between the outlet of the first exhaust heat boiler (52) and the 6th hand control valve (553).
8. adopt an Application way for the coal mine gas comprehensive application system as described in claim 1-7 any one claim, it is characterized in that, this Application way comprises following steps:
Step 1, the gas of coal mine gas drainage pump house extraction;
Step 2, the gas density that coal mine gas components of assays (1) measures, if gas density concentration is greater than 30%, introduces high concentration gas processing subsystem (2) by pipeline, if gas density is greater than 5% be less than 30%, be incorporated into low concentration gas processing subsystem (3) by pipeline; The gas density that mine air-lack components of assays (8) measures, if gas density is less than 0.7%, is incorporated into mine air-lack processing subsystem (4) by pipeline;
Step 2.1, high concentration gas processing subsystem (2) become by the chemical energy of gas electric energy to be connected to the grid high-temperature flue gas that (6) produce simultaneously, enters Heat Treatment subtense angle (5);
Step 2.2, low concentration gas processing subsystem (3) chemical energy of gas is become electric energy be connected to the grid (6) produce high-temperature flue gas simultaneously, enter Heat Treatment subtense angle (5);
Step 2.3, weary wind is oxidized to high-temperature flue gas by mine air-lack processing subsystem (4), enters Heat Treatment subtense angle (5);
Step 3, the high-temperature flue gas of the generation of gas is changed into electric energy and is connected to the grid (6) by Heat Treatment subtense angle (5);
Step 4, after the low-temperature flue gas that coal mine gas comprehensive application system produces measures low-temperature flue gas concentration, flow by densitometer (72), flowmeter (71), free of contamination clean gas is emptying from chimney (7).
9. the Application way of coal mine gas comprehensive application system according to claim 8, is characterized in that, in step 2.1, also comprise following steps:
Step 2.1.1, high concentration gas dewaters dedusting by high concentration gas pre-treater (21);
Step 2.1.2, gas chemical energy is become electric energy by high concentration gas jet dynamic control (22);
Also following steps are comprised in described step 2.2:
Step 2.2.1, security conveyer (31) conveying low concentration gas;
Step 2.2.2, low concentration gas dewaters dedusting by low concentration gas pre-treater (32);
Step 2.2.3, gas chemical energy is become electric energy by low concentration gas jet dynamic control (33);
Described step 2.3 comprises following steps:
Step 2.3.1 mine air-lack directly sends into weary wind oxidation coating (42) by weary wind delivery connection device (46), and oxidation produces high-temperature flue gas, enters the second exhaust heat boiler (511), and the flue gas of low temperature is discharged by chimney (7);
Step 2.3.2 when gas concentration lower than 0.25% time, mixing device (45) is by mine air-lack and high concentration gas blending;
The methane gas of step 2.3.3 blending is sent into the oxidation of weary wind oxidation coating (42) by weary wind delivery connection device (46) and is produced high-temperature flue gas, and enter the second exhaust heat boiler (511), the flue gas of low temperature is discharged by chimney (7).
10. the Application way of coal mine gas comprehensive application system according to claim 8, is characterized in that, also comprise following steps in described step 3:
Step 3.1 second controls sensing element (54) and regulates the high-temperature flue gas amount entering the first exhaust heat boiler (52);
Step 3.2 manual control part (55) supplements or intensification softened water;
The heat energy of step 3.3 UTILIZATION OF VESIDUAL HEAT IN circulation means (51) promotes steam turbine (56) work done, and drive electrical generators (53) produces electric energy;
After step 3.4 steam turbine (56) acting, remaining lower pressure steam enters condenser (514), condenses into after water enters condensation tank (515), feed water pump (516) is boosted, again enters the second exhaust heat boiler (511) circulating generation;
Described step 3.1 also comprises following steps:
Step 3.1.1, the high-temperature flue gas that high concentration jet dynamic control (22), low-concentration fuel generator (33) group generates, through the second the second mortor operated valve (541) controlling sensing element (54), the second solenoid valve (542), second-hand's brake control valve (543) and the second sensor (544), the second sensor (544) shows concentration and the flow number of high-temperature flue gas;
Step 3.1.2 regulates the second mortor operated valve (541), the second solenoid valve (542), if adjustable second-hand's brake control valve (543) when both lost efficacy, adjustment enters the high-temperature flue gas amount of the first exhaust heat boiler (52), guarantees the normal operation of the first exhaust heat boiler (52);
Described step 3.2 also comprises following steps:
Step 3.2.1 opens the 4th hand control valve (551), the 6th hand control valve (553), close the 5th hand control valve (552), the 7th hand control valve (554) simultaneously, make outside softened water enter condensation tank (515), supplement the water yield that waste heat circulation device (51) generating consumes;
Step 3.2.2 opens the 4th hand control valve (551), the 5th hand control valve (552) simultaneously, close the 6th hand control valve (553), after making softened water enter the first exhaust heat boiler (52) intensification, open the 7th hand control valve (554), enter condensation tank (515), amount of makeup water, enters feed water pump (516) boosting;
Described step 3.3 also comprises following steps:
The high-temperature flue gas that the weary wind oxidation coating (42) of step 3.3.1 produces controls the first sensor (434) of sensing element (43) by first, the concentration of display high-temperature flue gas and flow, regulate motor-operated control valve (431), solenoid valve (432), if the adjustable hand brake control valve (433) when both lost efficacy, adjustment enters the high-temperature flue gas amount of the second exhaust heat boiler (511), ensures that the second exhaust heat boiler (511) normally runs;
Step 3.3.2 second exhaust heat boiler (511) reclaims heat and generates superheated vapor, and promote steam turbine (513) acting, drive electrical generators (53) produces electric energy, and be connected to the grid (6), achieves energy recovery and utilizes.
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| CN102562131A (en) | 2012-07-11 |
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