CN116906177A - Environment-friendly coal bed gas combustion power generation device - Google Patents
Environment-friendly coal bed gas combustion power generation device Download PDFInfo
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- CN116906177A CN116906177A CN202311177183.XA CN202311177183A CN116906177A CN 116906177 A CN116906177 A CN 116906177A CN 202311177183 A CN202311177183 A CN 202311177183A CN 116906177 A CN116906177 A CN 116906177A
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- power generation
- combustion power
- coal bed
- slide carriage
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- 239000003245 coal Substances 0.000 title claims abstract description 64
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 54
- 238000010248 power generation Methods 0.000 title claims abstract description 52
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000003860 storage Methods 0.000 claims abstract description 60
- 238000001914 filtration Methods 0.000 claims abstract description 42
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 9
- 238000005065 mining Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 112
- 239000002245 particle Substances 0.000 description 8
- 238000007664 blowing Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
- F02C3/22—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being gaseous at standard temperature and pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses an environment-friendly coal bed gas combustion power generation device, and belongs to the technical field of coal bed gas exploitation and utilization; the combustion power generation device comprises three groups of storage units and a multi-stage filtering device which are connected; the three groups of storage units are respectively used for storing the gas with different sources and concentrations; the storage unit is connected with the combustion power generation system of the gas turbine through the gas mixing and supplying bin; a concentration and flow control device is connected between the storage unit and the gas mixing and supplying bin and used for adjusting the concentration and flow of the mixed gas in the gas mixing and supplying bin; the multistage filtering device is provided with a filtering structure with a plurality of layers of filtering holes gradually reduced from bottom to top, and gas is filtered layer by the filtering structure and then enters the storage unit through the exhaust pipe; the invention provides the coalbed methane with the methane content of more than 40 percent and stable quality through the three groups of storage units and the multistage filtering device, and solves the problem of unstable performance of the coalbed methane combustion power generation device caused by unstable gas supply concentration and low gas source quality.
Description
Technical Field
The invention belongs to the technical field of exploitation and utilization of coal bed gas, and relates to an environment-friendly coal bed gas combustion power generation device.
Background
Coalbed methane, also known as "coalbed methane," belongs to unconventional natural gas, and is produced along with coal. The main component of the coal bed gas is methane, the heat value of the coal bed gas is equivalent to that of conventional natural gas, and the coal bed gas is a clean, efficient and high-quality energy source which rises in the last 20 years. The comprehensive utilization of the coalbed methane can achieve the multiple purposes of saving resources, reducing environmental pollution, promoting the safe production of coal mines, adjusting energy structures and the like.
The coal bed gas combustion power generation system has more modes. For example, a gas turbine, a steam engine, or an internal combustion engine is used for combustion power generation, or cogeneration is used for cooling, heating, or the like for residents.
The Chinese patent with the bulletin number of CN205188232U discloses a coal bed gas power generation system which comprises a coal bed gas collection system, a coal bed gas purification system, a gas engine power generation system and a waste heat recovery system which are sequentially connected, wherein the coal bed gas collection system comprises a coal bed gas pumping device and a gas transmission pipeline connected with the coal bed gas pumping device, and the coal bed gas purification system comprises a condensation shunt and a filtering processor connected with the condensation shunt; the gas pipeline is communicated with the condensation diverter, and the filtering processor is connected with the gas engine power generation system. The gas turbine generator set generates power, has higher requirement on the quality of the air source, is applicable only when the methane content is more than 40% and the air source is stable, and has the power generation efficiency as high as 60%. However, as the concentration of the extracted gas is changed greatly, the gas concentration cannot meet the safety requirement, the combustion device is usually extinguished due to low gas concentration, and the concentration fluctuation can cause impact on the engine device, so that the performance of the engine device is seriously unstable; and coalbed methane and coal are stored in the coal layer in an adsorption state, so that the coals inevitably carry particles in the mining process, the quality of an air source can be influenced by the particles of the coals, and the service life of a power generation system can be influenced by long-time use.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides an environment-friendly coal bed gas combustion power generation device. The problem of unstable performance of the coal bed gas combustion power generation device due to unstable gas supply concentration and low gas source quality is solved.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
An environment-friendly coal bed gas combustion power generation device comprises three groups of coal bed gas storage systems; the coalbed methane storage system comprises a storage unit and a multi-stage filtering device which are connected; the storage units in the three groups of coal bed gas storage systems are respectively used for storing gas pre-pumped by the ground well of an original coal bed, gas pre-pumped by the ground well of a mining area and a goaf and high-concentration gas pumped underground; the storage units in the three groups of coal bed gas storage systems are communicated with the same gas mixing and supplying bin through branch pipes, and the gas mixing and supplying bin is connected with a gas turbine combustion power generation system; a concentration and flow control device is connected between the storage unit and the gas mixing and supplying bin and used for adjusting the concentration and flow of the mixed gas in the gas mixing and supplying bin;
the inside of the multistage filtering device is divided into a filtering cavity and a filter residue collecting cavity by a vertical partition board; the filter cavity is provided with a plurality of layers of filter holes which are gradually reduced from bottom to top, and an inclined slide carriage assembly is correspondingly arranged below each filter structure; one lower end of the slide carriage assembly extends to the filter residue collecting cavity; the bottom of the filter cavity is connected with an air inlet pipe, and the top of the filter cavity is connected with an exhaust pipe; the gas enters the filter cavity through the air inlet pipe at the bottom and enters the storage unit through the exhaust pipe after being filtered layer by the filter structure; the filter residue is discharged into a filter residue collecting cavity through the slide carriage assembly.
Further, the concentration and flow control device comprises a gas concentration sensor and a gas pressure sensor which are arranged in the storage unit, and a flow regulating valve and a flow meter which are arranged on the branch pipe; the flow regulating valve, the flowmeter, the gas concentration sensor and the air pressure sensor are all connected with the processor; and according to the methane volume fraction detected by the gas concentration sensor in each storage unit, the flow ratio of the gas supplied by the storage unit into the gas mixing and supplying bin is adjusted through the cooperation of the flow regulating valve and the flowmeter.
Furthermore, each group of coalbed methane storage systems comprises two storage units which are connected in parallel, so that one storage unit is used for one purpose.
Further, the gas mixing and supplying bin is connected with a gas turbine combustion power generation system through a main pipeline; a heating sleeve is arranged on the main pipeline, and a first temperature sensor and a second temperature sensor are respectively arranged on the main pipeline at two ends of the heating sleeve; the heating sleeve is provided with an air inlet and a plurality of air outlets which are arranged at intervals along the length direction of the main pipeline; electromagnetic valves connected with the processor are arranged on the exhaust ports; the air inlet is used for introducing tail gas generated by combustion of the combustion power generation system of the gas turbine; the high-temperature tail gas generated by combustion of the combustion power generation system of the gas turbine heats coal bed gas fed into the combustion power generation system of the gas turbine, and a plurality of exhaust ports are communicated with the same exhaust pipeline which is communicated with the tail gas treatment device.
Further, a back-blowing air outlet is formed in the bottom of the filter cavity, and a back-blowing air inlet is formed in the top of the filter cavity.
Further, the multistage filtering device comprises a box body, the vertical partition plate is vertically arranged in the box body, the filtering structure is in an inclined state, and the inclination directions of the slide carriage assembly and the filtering structure are the same; the box body is provided with a second opening, the vertical partition plate is provided with a first opening, one end of the slide carriage assembly penetrates through the second opening to extend out of the box body, and the other end penetrates through the first opening to enable the slide carriage assembly to extend into the filter residue collecting cavity; granular coal and the like filtered by the filtering structure can sink onto the slide carriage assembly under the action of self gravity and slide into the filter residue collecting cavity along the slide carriage assembly to be collected.
Further, a plurality of diaphragm plates are arranged in the filter residue collecting cavity, and divide the filter residue collecting cavity into a plurality of filter residue collecting spaces; the diaphragm plate is located first opening top, and the diaphragm plate suits with slide carriage subassembly quantity, makes every slide carriage subassembly correspond a filter residue and collects the space.
Further, the slide carriage assembly comprises a plurality of slide carriages which are distributed in a step shape; the two adjacent slide carriages are connected through a plurality of connecting columns, and the end part of the slide carriage positioned at one end penetrates through and extends to the outside of the box body and is connected with a horizontal knocking part; the knocking part is connected with a knocking mechanism; a slide carriage at the other end passes through the first opening and extends into the filter residue collecting space.
Furthermore, the knocking mechanism comprises a vertically arranged movable column, and one side of the movable column is connected with a plurality of L-shaped knocking rods positioned above the knocking part; the bottom end of the movable column is connected with a spring, the spring is fixed on a mounting seat, a pulse cylinder is arranged right above the movable column, and the end part of the pulse cylinder is right opposite to the movable column; the pulse cylinder is controlled to stretch and retract in a pulse mode to control the movable column to move up and down in a reciprocating mode, and then the knocking part is knocked intermittently through the L-shaped knocking rod.
Furthermore, a door opening for cleaning filter residues is formed in one side wall of the bottom of the filter residue collecting space, and a sealing door is cooperatively arranged at the door opening; the first opening is opposite to the door opening; a blocking mechanism for blocking the first opening is arranged in the filter residue collecting space; the plugging mechanism comprises a guide sleeve arranged on the bottom side surface of the transverse baffle, a guide rod is arranged in the guide sleeve, one end part of the guide rod is connected with the plugging plate, the bottom side surface of the plugging plate is provided with an inclined surface matched with the upper surface of the slide carriage, and the plugging mechanism further comprises a control mechanism for driving the plugging mechanism to move;
the control mechanism comprises a magnetic block and an electromagnet; the other end part of the guide rod is connected with a cross rod, the bottom of the cross rod is connected with a first vertical rod, the bottom side surface of the guide sleeve is connected with a second vertical rod, the second vertical rod is matched with the first vertical rod one by one, and an elastic telescopic mechanism is connected between the second vertical rod and the first vertical rod; the magnetic block is arranged at the end part of the first vertical rod, and the electromagnet is arranged on the side wall of the filter residue collecting space through a supporting rod; when the electromagnet is electrified, the electromagnet and the magnetic block generate repulsive action, and at the moment, the elastic telescopic mechanism is controlled to compress, so that the plugging plate moves to the position between the slide carriage and the diaphragm plate to form sealing; when the electromagnet is powered off, the electromagnet and the magnetic block are attracted mutually, the elastic telescopic mechanism is restored to a natural state, and the plugging plate slides out from between the slide carriage and the diaphragm plate.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, three groups of coal bed gas storage systems are sent into a gas mixing and supplying bin according to corresponding proportion to be mixed so as to obtain stable coal bed gas with methane content of more than 40%, and the coal bed gas is sent into a gas turbine combustion power generation system to be combusted and generated.
2. According to the invention, the multistage filtering structure is added in front of the coalbed methane storage unit, and the inclined slide carriage assembly is combined, so that the coalbed methane can be sufficiently filtered, the quality of the filtered coalbed methane is effectively improved, and the influence on a combustion power generation system of a gas turbine is avoided.
3. The environment-friendly coal bed gas combustion power generation device provided by the invention is used for generating power by coal bed gas, so that the stability of the device performance is effectively improved.
Drawings
FIG. 1 is a schematic diagram of a system connection of a combustion power generation device according to the present invention;
FIG. 2 is a schematic view of the external structure of the multistage filtering device according to the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3 at B;
FIG. 5 is a schematic diagram of a control mechanism according to the present invention;
FIG. 6 is a schematic view of the knocking mechanism according to the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
Referring to fig. 1-6, an environment-friendly coal-bed gas combustion power generation device is provided, and the device comprises three groups of coal-bed gas storage systems; the coalbed methane storage system comprises a storage unit 1 and a multi-stage filtering device 2 which are connected. The storage units 1 in the three groups of coal bed gas storage systems are respectively used for storing the gas pre-pumped by the ground well of the original coal bed, the gas pre-pumped by the ground well of the mining area and the goaf and the high-concentration gas pumped underground. The storage units 1 in the three groups of coal bed gas storage systems are all communicated with the same gas mixed gas supply bin 4, and the gas mixed gas supply bin 4 is communicated with the gas turbine combustion power generation system 3 and supplies coal bed gas with stable and desirable concentration into the gas turbine combustion power generation system 3.
In the embodiment, the volume fraction of methane in the gas pre-pumped by the ground well of the original coal seam exceeds 90%, the volume fraction of methane in the gas pre-pumped by the ground well of the storage mining area and the goaf is between 50% and 90%, and the volume fraction of methane in the high-concentration gas pumped underground is between 0% and 50%; and the gas turbine combustion power generation system 3 requires that the methane content is more than 40% and stable in normal power generation operation, based on the methane content, the three groups of coal bed gas storage systems are sent into the gas mixing and supplying bin 4 according to corresponding proportion to be mixed so as to obtain coal bed gas with the methane content of more than 40% and stable, and the coal bed gas is sent into the gas turbine combustion power generation system 3 to be combusted and generated.
It should be noted that, each storage unit 1 is provided with a gas concentration sensor and a gas pressure sensor, and the storage units 1 are communicated with the gas inlet end of the gas mixing and supplying bin 4 through a branch pipe 10, and the branch pipe 10 is provided with a flow regulating valve 101 and a flow meter 102; the flow regulating valve 101, the flowmeter 102, the gas concentration sensor and the air pressure sensor are all connected with the processor; according to the methane volume fraction detected by the gas concentration sensor in each storage unit 1, the flow rate ratio of the gas supplied by the storage unit 1 into the gas mixing and supplying bin 4 is adjusted by matching the flow rate regulating valve 101 with the flow meter 102.
It should be noted that, because the gas is produced while being mined in the coal mining process, based on this, each group of coalbed methane storage systems can also include two parallel storage units 1, so as to realize one standby; in use, one storage unit 1 stores gas along with coal exploitation, and the other storage unit 1 is communicated with the gas mixing and supplying bin 4 and supplies gas into the gas mixing and supplying bin 4. The air pressure sensor can detect the air pressure in the storage unit 1, when the air pressure in the storage unit 1 is detected to be too large, the storage unit 1 is switched in time, and the valve degree of the flow regulating valve 101 is controlled to meet the stability of the amount of air discharged through the storage unit 1 in unit time.
The gas mixing and supplying bin 4 is communicated with the gas turbine combustion power generation system 3 through a main pipeline 11. As shown in fig. 1, in order to ensure that the temperature of the coalbed methane fed into the combustion power generation system 3 of the gas turbine is stable; a heating jacket 12 is arranged on the main pipe 11, and a first temperature sensor 110 and a second temperature sensor 111 are respectively arranged on the main pipe 11 positioned at two ends of the heating jacket 12; the heating jacket 12 is provided with an air inlet 121 and a plurality of air outlets 122 which are arranged at intervals along the length direction of the main pipeline 11; and the exhaust ports 122 are provided with electromagnetic valves A connected with the processor; the first temperature sensor 110 and the second temperature sensor 111 detect the temperature of the coalbed methane before and after being processed by the heating jacket 12, so that the heating efficiency of the heating jacket 12 can be conveniently adjusted, the heating efficiency of the heating jacket 12 can be adjusted through the path of the air flow inside the channel formed by the heating jacket 12 and the main pipeline 11, namely, when the heating jacket is used, the electromagnetic valve A on the exhaust port 122 is controlled to be opened according to the temperature detection result.
The air inlet 121 is used for introducing tail gas generated by combustion of the gas turbine combustion power generation system 3; the high-temperature tail gas generated by the combustion of the gas turbine combustion power generation system 3 heats the coal bed gas fed into the gas turbine combustion power generation system 3 so as to improve the energy utilization rate, and a plurality of exhaust ports 122 are all communicated with the same exhaust pipeline which is communicated with the tail gas treatment device.
It will be appreciated that the storage unit 1 is provided with a multistage filter device 2 in communication with the air inlet end thereof, and that coal particles contained in the coal bed gas are filtered by the multistage filter device 2.
Of course, in practice, large particle coal tends to plug the filter holes when filtered using smaller filter holes due to the size of the particle coal. As shown in fig. 2 and 3, the multi-stage filtering device 2 in this embodiment includes a box 20, a vertical partition 21 is vertically disposed in the box 20, the vertical partition 21 separates the box 20 to form a filtering cavity and a filtering residue collecting cavity, the filtering cavity is provided with a plurality of inclined filtering structures 22 from bottom to top at intervals, the filtering holes of the plurality of filtering structures 22 are sequentially enlarged from top to bottom, the top of the box 20 located at the filtering cavity is communicated with an exhaust pipe 201, the bottom of the box is communicated with an air inlet pipe 202, and the filtering holes of the filtering structures 22 are formed into a multi-stage filtering structure by utilizing different sizes of the filtering holes, so as to avoid particles from blocking the filtering holes greatly. The gas enters the filter cavity through the air inlet pipe 202 at the bottom, is filtered layer by layer through the filter structure 22, and enters the storage unit 1 through the air outlet pipe 201; of course, in actual use, some particles adhere to the filter holes of the filter structure 22, and the filter holes of the filter structure 22 are in a structure with a small top and a large bottom in the invention; the top of the box body 20 is also communicated with a back-blowing air inlet 203, the bottom of the box body is also communicated with a back-blowing air outlet 204, and electromagnetic valves connected with a processor are respectively arranged on the back-blowing air inlet 203 and the back-blowing air outlet 204; the blowback air outlet 204 is communicated with a blowback air collecting device, and is used for blowback to the filter structure 22, so as to prevent the filter holes of the filter structure 22 from being blocked.
As shown in fig. 3, an inclined slide carriage assembly 23 is arranged below each filtering structure 22, the inclined directions of the slide carriage assembly 23 and the filtering structures 22 are the same, a second opening 29 is formed in the box body 20, a first opening 211 is formed in the vertical partition plate 21, one end of the slide carriage assembly 23 extends out of the box body 20 through the second opening 29, and the other end of the slide carriage assembly 23 extends into the filter residue collecting cavity through the first opening 211; when in use, the granular coal and the like filtered by the filtering structure 22 can sink onto the slide carriage assembly 23 under the action of self gravity and slide into the filter residue collecting cavity along the slide carriage assembly 23 for collection.
As shown in fig. 3 and 4, in order to avoid the slide assembly 23 blocking the air flow, the slide assembly 23 includes a plurality of slides 230 distributed in a stepped shape; two adjacent slide carriages 230 are connected through a plurality of connecting columns 231, the end part of the slide carriage 230 positioned at one end penetrates through and extends to the outside of the box body 20, and the end part of the slide carriage 230 is connected with a horizontal knocking part 232; a slide carriage 230 at the other end passes through the first opening 211 and extends into the residue collection chamber; a plurality of diaphragm plates 24 are arranged in the filter residue collecting cavity, the diaphragm plates 24 are located right above the first openings 211, and the diaphragm plates 24 are matched with the slide carriage assemblies 23 in number, so that each slide carriage assembly 23 corresponds to one filter residue collecting space.
It will be appreciated that in order to treat the impurities collected in the residue collecting space, the impurities need to be taken out from the residue collecting space, a door opening 27 is formed on a side wall of the bottom of the residue collecting space, and a sealing door 28 is cooperatively installed at the door opening 27.
As shown in fig. 3, the first opening 211 is opposite to the door opening 27 because the filter residue collecting space communicates with the filter chamber. When the sealing door 28 is opened, high-speed air flow can enter the filter residue collecting space from the first opening 211 to cause dust emission and other problems, and in the embodiment, a blocking mechanism for blocking the first opening 211 is arranged in the filter residue collecting space; referring to fig. 3 and 5, the plugging mechanism includes a guide sleeve 25 mounted on the bottom side of the diaphragm 24, a guide rod 251 is disposed in the guide sleeve 25, one end of the guide rod 251 is connected with a plugging plate 252, the bottom side of the plugging plate 252 is provided with an inclined surface 253 matched with the upper surface of the slide carriage 230, and a control mechanism for driving the plugging mechanism to move is also included.
Specifically, as shown in fig. 5, the control mechanism includes a magnet 258 and an electromagnet 261; the other end of the guide rod 251 is connected with a cross rod 254, the bottom of the cross rod 254 is connected with a first vertical rod 255, the bottom side surface of the guide sleeve 25 is connected with a second vertical rod 256, the second vertical rod 256 is matched with the first vertical rod 255 one by one, and an elastic telescopic mechanism 257 is connected between the second vertical rod 256 and the first vertical rod 255; the magnetic block 258 is arranged at the end part of the first vertical rod 255, and the electromagnet 261 is arranged on one side wall of the filter residue collecting space through a supporting rod 26; when the electromagnet 261 is electrified, the electromagnet 261 and the magnetic block 258 generate a repulsive action, and at the moment, the elastic telescopic mechanism 257 is controlled to compress, so that the plugging plate 252 moves to the position between the slide carriage 230 and the diaphragm plate 24 to form a seal; when the electromagnet 261 is deenergized, the electromagnet 261 and the magnet 258 attract each other, the elastic telescopic mechanism 257 returns to the natural state, and the blocking plate 252 slides out from between the slide carriage 230 and the diaphragm plate 24.
Meanwhile, in order to avoid the phenomenon that the particle coal is adsorbed on the upper surface of the slide carriage 230 and cannot slide down, the invention needs to provide a knocking mechanism to cause the slide carriage 230 to vibrate.
Specifically, as shown in fig. 6, the striking mechanism includes a vertically arranged movable column 240 driven to reciprocate up and down, and one side of the movable column 240 is connected with a plurality of L-shaped striking rods 241 located above the striking parts 232 and intermittently striking the striking parts 232; the bottom end of the movable column 240 is connected with a spring 242, the spring 242 is fixed on a mounting seat 243, a pulse air cylinder 244 is arranged right above the movable column 240, and the end part of the pulse air cylinder 244 is opposite to the movable column 240; in the invention, the pulse cylinder 244 is controlled to perform pulse expansion and contraction to control the movable column 240 to perform reciprocating up and down movement, so that the L-shaped knocking rod 241 is utilized to intermittently knock the knocking part 232.
As shown in fig. 3 and 4, a first rubber layer 212 is arranged at the first opening 211; a second rubber layer 291 is provided at the second opening 29; through the setting of first rubber layer 212 and second rubber layer 291, utilize the rubber material to warp and shock attenuation characteristics, conveniently when knocking the portion 232, avoid causing box 20 vibrations, conveniently utilize spliced pole 231 to vibrate the transmission simultaneously.
While the invention has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art to which the invention pertains without departing from the scope of the invention defined by the appended claims.
Claims (10)
1. The environment-friendly coal bed gas combustion power generation device is characterized by comprising three groups of coal bed gas storage systems; the coalbed methane storage system comprises a storage unit (1) and a multi-stage filtering device (2) which are connected; the storage units (1) in the three groups of coal bed gas storage systems are respectively used for storing gas pre-pumped by a ground well of an original coal bed, gas pre-pumped by the ground well of a mining area and a goaf and high-concentration gas pre-pumped by the ground well and underground; the storage units (1) in the three groups of coal bed gas storage systems are communicated with the same gas mixing and gas supplying bin (4) through branch pipes (10), and the gas mixing and gas supplying bin (4) is connected with a gas turbine combustion power generation system (3); a concentration and flow control device is connected between the storage unit (1) and the gas mixing and supplying bin (4) and used for adjusting the concentration and flow of the mixed gas in the gas mixing and supplying bin (4);
the inside of the multistage filtering device (2) is divided into a filtering cavity and a filter residue collecting cavity by a vertical partition board (21); the filter cavity is provided with a plurality of layers of filter structures (22) with gradually reduced filter holes from bottom to top, and an inclined slide carriage assembly (23) is correspondingly arranged below each filter structure (22); the lower end of the slide carriage assembly (23) extends to a filter residue collecting cavity; the bottom of the filter cavity is connected with an air inlet pipe (202), and the top of the filter cavity is connected with an exhaust pipe (201); the gas enters the filter cavity through the air inlet pipe (202) at the bottom and enters the storage unit (1) through the exhaust pipe (201) through layer-by-layer filtration of the filter structure (22); the filter residues are discharged into a filter residue collecting cavity through a slide carriage assembly (23).
2. An environment-friendly coalbed methane combustion power generation device according to claim 1, wherein the concentration and flow control device comprises a gas concentration sensor and a gas pressure sensor which are arranged in the storage unit (1), and a flow regulating valve (101) and a flow meter (102) which are arranged on the branch pipe (10); the flow regulating valve (101), the flowmeter (102), the gas concentration sensor and the air pressure sensor are all connected with the processor; according to the methane volume fraction detected by the gas concentration sensor in each storage unit (1), the flow ratio of the gas supplied by the storage unit (1) into the gas mixing and supplying bin (4) is adjusted through the cooperation of the flow regulating valve (101) and the flowmeter (102).
3. An environment-friendly coalbed methane combustion power generation device according to claim 1, wherein each group of coalbed methane storage systems comprises two storage units (1) which are connected in parallel to realize one standby.
4. An environment-friendly coalbed methane combustion power generation device according to claim 1, wherein the gas mixing and supply bin (4) is connected with the gas turbine combustion power generation system (3) through a main pipeline (11); a heating sleeve (12) is arranged on the main pipeline (11), and a first temperature sensor (110) and a second temperature sensor (111) are respectively arranged on the main pipeline (11) at two ends of the heating sleeve (12); an air inlet (121) and a plurality of air outlets (122) which are arranged at intervals along the length direction of the main pipeline (11) are arranged on the heating sleeve (12); electromagnetic valves connected with the processor are arranged on the exhaust ports (122); the air inlet (121) is used for introducing tail gas generated by combustion of the combustion power generation system (3) of the gas turbine; the high-temperature tail gas generated by the combustion of the gas turbine combustion power generation system (3) heats the coal bed gas fed into the gas turbine combustion power generation system (3), a plurality of exhaust ports (122) are all communicated with the same exhaust pipeline, and the exhaust pipeline is communicated with the tail gas treatment device.
5. An environment-friendly coal bed gas combustion power generation device as claimed in claim 1, wherein a blowback air outlet (204) is arranged at the bottom of the filter cavity, and a blowback air inlet (203) is arranged at the top of the filter cavity.
6. An environment-friendly coal bed gas combustion power generation device according to claim 1, wherein the multi-stage filtering device (2) comprises a box body (20), a vertical partition plate (21) is vertically arranged in the box body (20), a filtering structure (22) is in an inclined state, and the inclination directions of a slide carriage assembly (23) and the filtering structure (22) are the same; a second opening (29) is formed in the box body (20), a first opening (211) is formed in the vertical partition plate (21), one end of the slide carriage assembly (23) penetrates through the second opening (29) to extend out of the box body (20), and the other end penetrates through the first opening (211) to enable the slide carriage assembly (23) to extend into the filter residue collecting cavity; the granular coal and the like filtered by the filtering structure (22) can sink onto the slide carriage assembly (23) under the action of self gravity and slide into the filter residue collecting cavity along the slide carriage assembly (23) for collection.
7. An environmentally friendly coal bed gas combustion power generation device according to claim 6, wherein a plurality of diaphragm plates (24) are arranged in the filter residue collecting cavity, and the plurality of diaphragm plates (24) divide the filter residue collecting cavity into a plurality of filter residue collecting spaces; the diaphragm plates (24) are arranged above the first openings (211), and the number of the diaphragm plates (24) is matched with that of the slide carriage assemblies (23), so that each slide carriage assembly (23) corresponds to one filter residue collecting space.
8. An environmentally friendly coalbed methane combustion power generation device according to claim 7, characterized in that the carriage assembly (23) comprises a plurality of carriages (230) distributed in a stepwise manner; two adjacent slide carriages (230) are connected through a plurality of connecting columns (231), and the end part of the slide carriage (230) positioned at one end penetrates through and extends to the outside of the box body (20) and is connected with a horizontal knocking part (232); the knocking part (232) is connected with a knocking mechanism; a slide carriage (230) at the other end passes through the first opening (211) and extends into the residue collecting space.
9. The environment-friendly coal bed gas combustion power generation device according to claim 8, wherein the knocking mechanism comprises a vertically arranged movable column (240), and one side of the movable column (240) is connected with a plurality of L-shaped knocking rods (241) positioned above the knocking part (232); the bottom end of the movable column (240) is connected with a spring (242), the spring (242) is fixed on a mounting seat (243), a pulse air cylinder (244) is arranged right above the movable column (240), and the end part of the pulse air cylinder (244) is opposite to the movable column (240); the movable column (240) is controlled to reciprocate up and down by controlling the pulse cylinder (244) to perform pulse expansion and contraction, and then the striking part (232) is struck intermittently by the L-shaped striking rod (241).
10. An environment-friendly coal bed gas combustion power generation device according to claim 8, wherein a door opening (27) for cleaning filter residues is formed in one side wall of the bottom of the filter residue collecting space, and a sealing door (28) is cooperatively arranged at the door opening (27); the first opening (211) is opposite to the door opening (27); a blocking mechanism for blocking the first opening (211) is arranged in the filter residue collecting space; the plugging mechanism comprises a guide sleeve (25) arranged on the bottom side surface of the diaphragm plate (24), a guide rod (251) is arranged in the guide sleeve (25), one end part of the guide rod (251) is connected with a plugging plate (252), the bottom side surface of the plugging plate (252) is provided with an inclined surface (253) matched with the upper surface of the slide carriage (230), and the plugging mechanism further comprises a control mechanism for driving the plugging mechanism to move;
the control mechanism comprises a magnetic block (258) and an electromagnet (261); the other end part of the guide rod (251) is connected with a cross rod (254), the bottom of the cross rod (254) is connected with a first vertical rod (255), the bottom side surface of the guide sleeve (25) is connected with a second vertical rod (256), the second vertical rod (256) is matched with the first vertical rod (255) one by one, and an elastic telescopic mechanism (257) is connected between the second vertical rod and the first vertical rod; the magnetic block (258) is arranged at the end part of the first vertical rod (255), and the electromagnet (261) is arranged on the side wall of the filter residue collecting space through a supporting rod (26); when the electromagnet (261) is electrified, the electromagnet (261) and the magnetic block (258) generate repulsive action, and at the moment, the elastic telescopic mechanism (257) is controlled to compress, so that the plugging plate (252) moves to the slide carriage (230) to form a seal with the diaphragm plate (24); when the electromagnet (261) is powered off, the electromagnet (261) and the magnetic block (258) are attracted to each other, the elastic telescopic mechanism (257) is restored to a natural state, and the plugging plate (252) slides out from between the slide carriage (230) and the diaphragm plate (24).
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