CN109297036B

CN109297036B - Self-adaptive oxidation device for unidirectional flowing concentration of coal mine gas

Info

Publication number: CN109297036B
Application number: CN201811145893.3A
Authority: CN
Inventors: 李庆钊; 林柏泉; 郑苑楠
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2023-09-12
Anticipated expiration: 2038-09-29
Also published as: CN109297036A

Abstract

The utility model provides a colliery gas one-way flow concentration self-adaptation oxidation unit, includes intake system, downstream heat accumulation oxidation bed, start-up combustion chamber, countercurrent heat accumulation oxidation bed and exhaust system that communicate in proper order, downstream heat accumulation oxidation bed, start-up combustion chamber and countercurrent heat accumulation oxidation bed are the structural arrangement of falling "U"; an air inlet gas concentration sensor, an air inlet flow sensor, an electric regulating valve I and an air-air heat exchanger are sequentially arranged on the air inlet system; the bottom of the thermal oxidation bed is provided with a uniform flow chamber, the upper part of the uniform flow chamber is filled with a porous heat accumulator, and high-temperature heat pipes I and II are arranged in the porous heat accumulator; an internal heat collector is arranged in the starting combustion chamber; the high-temperature heat pipe is connected with the starting combustion chamber; the exhaust system is communicated with the countercurrent heat accumulating oxidation bed through a gas-gas heat exchanger. The invention can reduce the emission of greenhouse gas, realize the self-adaptive oxidation of the continuous flowing concentration of the gas, improve the efficiency and the utilization rate of the gas oxidation and have high energy utilization efficiency.

Description

Self-adaptive oxidation device for unidirectional flowing concentration of coal mine gas

Technical Field

The invention relates to a coal mine gas unidirectional continuous flow concentration self-adaptive oxidation device which is suitable for comprehensively utilizing extracted gas and ventilation gas in a coal mine area.

Background

Gas is a coal-associated product, and is a valuable non-renewable energy source. For the safe production of coal mines, the existence of gas is also a source of disasters frequently occurring in coal mine accidents, and meanwhile, as the coal mining depth increases, the gas content of a coal bed is obviously increased, so that the co-mining of coal and gas is a necessary way for deep coal and gas resource mining. Meanwhile, in terms of emission of coal mine gas, the emission of ventilation gas accounts for about 70% of the total emission of coal mine gas. Because the concentration of ventilation gas is low (less than or equal to 1 percent) and the flow fluctuation is large, the conventional utilization technology is difficult to effectively utilize. Therefore, how to realize reasonable and effective recycling comprehensive utilization of coal mine extraction gas and ventilation gas has great significance for improving the safe and efficient production level of coal mine and reducing the emission of greenhouse gases.

The gas heat-accumulating oxidation is to heat the gas to a certain temperature in a starting combustion chamber and oxidize the gas, and then the generated high-temperature gas flows through a heat accumulator to heat the gas, so that the gas is used for preheating the gas entering subsequently, the fuel consumption of the gas for heating is saved, meanwhile, the gas can be continuously oxidized to reduce the emission of the gas, and the heat generated after oxidation can also be used for heat supply or power generation, so that the gas heat-accumulating oxidation has the most practical applicability for realizing reasonable and effective comprehensive utilization of the coal mine extracted gas and ventilation gas.

However, no unidirectional continuous flow concentration adaptive oxidation method is proposed to date specifically for the emission characteristics of the extracted gas and the ventilation gas of the coal mining area.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the coal mine gas unidirectional flow concentration self-adaptive oxidation device, which not only can reduce emission of greenhouse gas (methane) and obtain clean energy conversion of coal mine gas, but also can realize continuous flow concentration self-adaptive oxidation of the gas, greatly improve the efficiency and the utilization rate of the gas oxidation, and has higher energy utilization efficiency.

The technical scheme adopted for solving the technical problems is as follows: the device comprises an air inlet system, a downstream heat accumulating oxidation bed, a starting combustion chamber, a countercurrent heat accumulating oxidation bed and an exhaust system which are sequentially communicated, wherein the downstream heat accumulating oxidation bed, the starting combustion chamber and the countercurrent heat accumulating oxidation bed are arranged in an inverted U-shaped structure; the air inlet system is sequentially provided with an air inlet gas concentration sensor, an air inlet flow sensor, an electric regulating valve I and an air-air heat exchanger, wherein the air-air heat exchanger is divided into two parts by a sealing partition plate, the upper part of the air-air heat exchanger is connected with the air inlet system, the lower part of the air-air heat exchanger is connected with the air exhaust system, and the tail end of the air inlet system is communicated with the air inlet at the bottom of the downstream heat storage oxidation bed; the bottom of the downstream heat storage oxidation bed is provided with an air inlet uniform flow chamber, the upper part of the air inlet uniform flow chamber is filled with a porous heat storage body I, and a high-temperature heat pipe I is arranged above the inner part of the porous heat storage body I; the bottom of the countercurrent heat storage oxidation bed is provided with an exhaust uniform flow chamber, the upper part of the exhaust uniform flow chamber is filled with a porous heat storage body II, and a high-temperature heat pipe II is arranged above the inside of the porous heat storage body II; a heat collector is arranged in the starting combustion chamber, and a starting combustor is also arranged above the middle part of the starting combustion chamber; the high-temperature heat pipe I and the high-temperature heat pipe II in the porous heat accumulator I and the porous heat accumulator II are respectively connected with the starting combustion chamber; the exhaust system is communicated with the countercurrent heat storage oxidation bed through the gas-gas heat exchanger.

Compared with the prior art, the coal mine gas unidirectional flow concentration self-adaptive oxidation device has the advantages that the coal mine ventilation gas and the extracted low concentration gas are controlled by the air inlet system after being mixed, flow is regulated in real time, the mixed gas enters the inverted U-shaped heat storage oxidation bed for oxidation, the high-temperature heat pipe can rapidly transfer initial heat generated by starting the combustion chamber into the forward oxidation bed and the reverse flow oxidation bed, the temperature inside the oxidation bed is uniformly distributed in the operation process of the device, the rapid and efficient gas oxidation process is ensured, and the heat generated by the whole oxidation bed is converted into steam power by the heat collector for high-efficiency utilization. The coal mine extracted gas and ventilation gas realize the self-adaptive oxidation of the continuous flowing concentration of the gas under the joint adjustment of an inlet gas concentration sensor, an inlet gas flow sensor and an electric regulating valve I; the U-shaped arrangement of the downstream heat accumulating oxidation bed, the starting combustion chamber and the countercurrent heat accumulating oxidation bed greatly improves the utilization rate of gas oxidation; the high-temperature heat pipe I and the high-temperature heat pipe II in the porous heat accumulator I and the porous heat accumulator II ensure that the oxidation process is fast carried out, and the internal temperatures of the porous heat accumulator I and the porous heat accumulator II are uniformly distributed; the waste heat of flue gas in the exhaust system can preheat the inlet gas in the gas-gas heat exchanger, no gas exchange exists, and the heat storage oxidation reaction rate is improved while the fuel is saved. Therefore, the invention is particularly aimed at the characteristics of coal mine gas extraction and ventilation gas, and is suitable for coal mine gas in all concentration ranges including gas extraction and ventilation gas. Clean energy conversion of coal mine gas can be obtained while emission of greenhouse gas (methane) can be reduced, forward flow and reverse flow heat storage oxidation can be carried out under the condition of unidirectional flow, gas oxidation efficiency is improved through use of high-temperature heat pipes and self-adaptive adjustment of gas concentration, waste heat of flue gas is fully utilized, and the whole gas oxidation system has higher energy utilization efficiency.

Drawings

The invention will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of an embodiment of the present invention; in FIG. 1, a 110-concurrent regenerative oxidation bed; 111-an air inlet homogenizing chamber; 112-high temperature heat pipe I; 113-porous heat accumulator I; 114-concurrent heat collector; 120-countercurrent heat accumulating oxidation bed; 121-an exhaust plenum; 122-high temperature heat pipe II; 123-porous heat accumulator II; 124-countercurrent heat extractor; 130-starting the combustion chamber; 131-starting the burner; 132—internal heat extractors; 140-an air intake system; 141-an intake gas concentration sensor; 142-an intake air flow sensor; 143-an electric regulating valve I; 144-gas heat exchanger; 150-an exhaust system; 151-an exhaust gas flow sensor; 152-an exhaust gas concentration sensor; 153-electric regulating valve II.

FIG. 2 is a schematic diagram of another embodiment of the present invention; in fig. 2, 210-concurrent regenerative oxidation bed; 211-an air inlet homogenizing chamber; 212-high temperature heat pipe I; 213-porous heat accumulator I; 215-temperature sensor i; 216—temperature sensor iii; 217-inlet air homogenizer; 220-a countercurrent regenerative oxidation bed; 221-an exhaust plenum; 222-a high temperature heat pipe II; 223-porous heat accumulator II; 225-temperature sensor ii; 226—temperature sensor iv; 227-an exhaust homogenizer; 230-starting the combustion chamber; 231-starting the burner; 232-an internal heat extractor; 233-temperature sensor v; 234—a temperature sensor vi; 240-an air intake system; 241-an intake gas concentration sensor; 242-an intake air flow sensor; 243-an electric regulating valve I; 244-gas heat exchanger; 245-high temperature heat pipe III; 250-exhaust system; 251-exhaust gas flow sensor; 260-a housing; 261-a heat preservation and insulation layer; 262-thickening the heat-preserving and heat-insulating layer; 270-a high temperature medium outlet; 271-a heater outlet pressure sensor; 272—a heater outlet flow sensor; 273-heater outlet shutoff valve; 280-cryogenic medium inlet; 281-a heat extractor inlet pressure sensor; 282-a heater inlet flow sensor; 283-heat extractor inlet shutoff valve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

In embodiment 1 shown in fig. 1, a coal mine gas unidirectional flow concentration self-adaptive oxidation device comprises a forward flow heat storage oxidation bed 110, a reverse flow heat storage oxidation bed 120, a starting combustion chamber 130, an air inlet uniform flow chamber 111, a forward flow heat collector 114, a porous heat storage body I113, a high-temperature heat pipe I112, an internal heat collector 132, a starting combustor, a high-temperature heat pipe II 122, a porous heat storage body II 123, a reverse flow heat collector, an air outlet uniform flow chamber 121, an air inlet system 140, an air inlet gas concentration sensor 141, an air inlet flow sensor 142, an electric control valve I143, an air-air heat exchanger 144, an air outlet system 150, an air outlet flow sensor 151, an air outlet gas concentration sensor 152 and an electric control valve II; the downstream regenerative thermal oxidizer 110, the start-up combustion chamber 130 and the countercurrent regenerative thermal oxidizer 120 are sequentially communicated and are arranged in an inverted U-shaped structure; the downstream heat accumulating oxidation bed 110 is sequentially connected with a porous heat accumulator I113 through an air inlet uniform flow chamber 111; a downstream heat collector 114 and a high-temperature heat pipe I112 are arranged in the porous heat accumulator I113 from bottom to top; a high-temperature heat pipe II 122, a porous heat accumulator II 123, a countercurrent heat collector 124 and an exhaust gas homogenizing chamber 121 are arranged in the countercurrent heat accumulating oxidation bed 120 in the same way; the concurrent heat collector 114, the internal heat collector 132 and the countercurrent heat collector 124 are all in a loop-shaped layout, so that the fluid medium in each heat collector fully absorbs the heat generated by gas oxidation, and the heat exchange efficiency of the heat collector is improved; the high-temperature heat pipe I112 and the high-temperature heat pipe II 122 in the porous heat accumulator I113 and the porous heat accumulator II 123 are respectively connected with the starting combustion chamber 130. An internal heat collector 132 is arranged in the starting combustion chamber 130, and the internal heat collector 132 can utilize heat in the device; a start-up burner 131 is arranged in the middle; the air inlet system 140 is sequentially connected with an air inlet gas concentration sensor 141, an air inlet flow sensor 142, an electric regulating valve I143 and an air-air heat exchanger 144, and the air inlet system 140 can timely control the electric regulating valve according to monitoring parameters of the exhaust flow sensor 151, the air inlet flow sensor 142 and the air inlet gas concentration sensor 141; the exhaust system 150 is sequentially connected with an exhaust flow sensor 151, an exhaust gas concentration sensor 152, an electric regulating valve II 153 and the gas-gas heat exchanger 144, and the exhaust flow sensor 151 and the exhaust gas concentration sensor 152 can analyze the running state of the device according to the exhaust flow and the gas concentration in the flue gas, such as the gas oxidation efficiency, the gas utilization amount and the like, so as to control the electric regulating valve II 153 to regulate the gas inlet and outlet flow.

Principle procedure of example 1:

A. the starting process comprises the following steps: the gas and ventilation gas extracted from the extraction pump station are mixed and then enter an air inlet system 140, the parameters of the mixed gas are monitored in real time through an air inlet gas concentration sensor 141 and an air inlet flow sensor 142, an electric regulating valve I143 is controlled timely, the gas enters a starting combustion chamber 130 after passing through a downstream heat storage oxidation bed 110, a starting burner 131 is operated to burn the low-concentration gas, heat is generated and is conducted to the downstream heat storage oxidation bed 110 and a countercurrent heat storage oxidation bed 120 through a high-temperature heat pipe I112 and a high-temperature heat pipe II 122, and after the temperature of an internal porous heat storage body I113 and a porous heat storage body II 123 reaches the minimum temperature requirement of gas heat storage combustion, the device is normally operated;

B. the operation process comprises the following steps: the gas sequentially passes through an air inlet uniform flow chamber 111 and a porous heat accumulator I113 in the downstream heat accumulating oxidation bed 110, and is subjected to heat accumulating oxidation in the downstream heat accumulating oxidation bed; after the combustion chamber 130 is started to continue to burn, part of the gas enters the countercurrent heat storage oxidation bed 120, and after the rest of the gas is subjected to heat storage oxidation in the porous heat storage body II 123, the rest of the gas sequentially passes through the exhaust uniform flow chamber 121 and the gas-gas heat exchanger 144 to be discharged out of the device; the discharged flue gas conducts the rest heat to the gas mixture in the gas-gas heat exchanger 144 to preheat the gas mixture, thereby saving the fuel consumption of gas heating; heat generated in the apparatus is utilized by the concurrent heat extractor 114, the internal heat extractor 132, and the counter-current heat extractor 124. The high-temperature heat pipe I112 and the high-temperature heat pipe II 122 can rapidly conduct heat generated in the starting combustion chamber 130 to the porous heat accumulator I113 and the porous heat accumulator II 123, and the temperature inside the oxidation bed is uniformly distributed in the running process of the device. After the oxidation device is started, the gas can pass through three stages of initial heat accumulation combustion, high-temperature combustion and smoke heat accumulation combustion. The excess heat above the intake and exhaust plenums 111 and 121 can be recovered by the downstream and upstream heat extractors 114 and 124. The exhaust system 150 can preheat the inlet gas in the gas-gas heat exchanger 144 by using the residual heat of the flue gas, and no gas exchange exists.

In another embodiment 2 shown in fig. 2, a coal mine gas unidirectional flow concentration adaptive oxidation apparatus (the following description of the structure focuses on the point different from that of embodiment 1, and the description of some of the same structures is omitted, please refer to the related description of embodiment 1 to fully understand the structural scheme of embodiment 2, and the same applies to the understanding of embodiment 1) includes an air intake system 240, a downstream thermal storage oxidation bed 210, a start-up combustion chamber 230, a counter-flow thermal storage oxidation bed 220, and an exhaust system 250 that are sequentially connected. The downstream regenerative thermal oxidizer 210, the start-up combustion chamber 230 and the countercurrent regenerative thermal oxidizer 220 are jointly installed inside a housing 260 with a thermal insulation layer 261; a thickened heat-insulating layer 262 is also arranged between the forward flow heat-accumulating oxidation bed 210 and the reverse flow heat-accumulating oxidation bed 220; the shell 260 and the heat-insulating layer 261 are designed to prevent heat inside the oxidation device from dissipating, maintain the operation temperature of the oxidation device, and the methane heat-accumulating oxidation needs to be performed under a certain temperature condition, while the temperature of the part between the downstream heat-accumulating oxidation bed 210 and the countercurrent heat-accumulating oxidation bed 220 is higher, and the part needs to be thickened to prevent damage, so that the thickened heat-insulating layer 262 is additionally arranged. An intake gas concentration sensor 241, an intake flow sensor 242, an electric control valve and an air-air heat exchanger 244 are sequentially arranged on the intake system 240, the air-air heat exchanger 244 preheats intake gas by utilizing exhaust flue gas waste heat, one side of the upper half part of the air-air heat exchanger 244 is connected with an electric control valve I243, the other side is connected with an intake uniform flow chamber 211, one side of the lower half part of the air-air heat exchanger 244 is connected with the electric control valve I243, and the other side is connected with an exhaust uniform flow chamber 221; a plurality of high-temperature heat pipes III 245 are also arranged in the gas-gas heat exchanger 244 at intervals so as to improve the heat exchange efficiency between the high-temperature flue gas and the raw gas; the tail end of the air inlet system 240 is communicated with the bottom air inlet of the downstream regenerative oxidation bed 210; the bottom of the downstream heat accumulating oxidation bed 210 is provided with an air inlet uniform flow chamber 211, and the upper part of the downstream heat accumulating oxidation bed 210 is filled with a porous heat accumulator I213; the bottom of the countercurrent heat-accumulating oxidation bed 220 is provided with an exhaust uniform flow chamber 221, and the upper part of the countercurrent heat-accumulating oxidation bed 220 is filled with a porous heat accumulator II 223; the porous heat accumulator I213 and the porous heat accumulator II 223 are provided with a plurality of high-temperature heat pipes I212 and a plurality of high-temperature heat pipes II 222 which are distributed at equal intervals, the high-temperature heat pipes can conduct heat in the high-temperature area in the heat accumulator to the low-temperature area in the heat accumulator through medium in the pipes, and the plurality of high-temperature heat pipes are distributed at equal intervals, so that the temperature distribution of the whole heat accumulator is more uniform, and the gas heat accumulation oxidation is facilitated; the side walls of the concurrent heat accumulation oxidation bed 210 and the countercurrent heat accumulation oxidation bed 220 are respectively and equidistantly provided with a plurality of temperature sensors I215 and II 225, and the tail ends of the temperature sensors I215 and II 225 are respectively inserted into the porous heat accumulator I213 and the porous heat accumulator II 223. Temperature sensor III 216 and temperature sensor IV 226 are respectively arranged in the air inlet homogenizing chamber 211 and the air outlet homogenizing chamber 221, and the tail ends of the temperature sensor III 216 and the temperature sensor IV 226 are respectively positioned in the middle of the air inlet homogenizing chamber 211 and the air outlet homogenizing chamber 221. An air inlet flow homogenizing device 217 is further arranged between the air inlet flow homogenizing chamber 211 and the porous heat accumulator I213, an air outlet flow homogenizing device 227 is arranged between the air outlet flow homogenizing chamber 221 and the porous heat accumulator II 223, and after the air inlet flow homogenizing device 217 and the air outlet flow homogenizing device 227 are additionally arranged, gas in the air inlet flow homogenizing chamber 211 can uniformly enter the porous heat accumulator, uneven distribution of the gas in the porous heat accumulator is avoided, and the oxidation efficiency of the device is improved. The exhaust system 250 is connected with the countercurrent heat accumulating oxidation bed 220, and an exhaust flow sensor 251 is arranged on the exhaust system 250. The start-up combustion chamber 230 is provided with a built-in internal heat collector 232 and a start-up burner 231. A temperature sensor v 233 and a temperature sensor vi 234 are respectively disposed above the start-up combustion chamber 230 at both sides of the start-up combustion chamber 231. The gas heat accumulation oxidation can be performed under a certain temperature condition, and the temperature sensor I215, the temperature sensor II 225, the temperature sensor III 216, the temperature sensor IV 226, the temperature sensor V233 and the temperature sensor VI 234 can monitor the running state of the device in real time and judge whether the device runs normally or not so as to adjust the running parameters of the device to ensure that the device runs normally. The high temperature medium outlet 270 of the internal heat collector 232 is provided with a heat collector outlet pressure sensor 271, a heat collector outlet flow sensor 272 and a heat collector outlet stop valve 273 in sequence, and the low temperature medium inlet 280 is provided with a heat collector inlet pressure sensor 281, a heat collector inlet flow sensor 282 and a heat collector inlet stop valve 283 in sequence; the internal medium of the internal heat collector 232 is changed from a liquid phase to a gas phase when passing through the oxidation device, and the heat collector outlet pressure sensor 271, the heat collector outlet flow sensor 272, the heat collector outlet stop valve 273, the heat collector inlet pressure sensor 281, the heat collector inlet flow sensor 282 and the heat collector inlet stop valve 283 are arranged to monitor the operation state of the heat collector, prevent safety accidents and evaluate the heat collecting effect.

Working procedure of example 2:

A. the starting process comprises the following steps: coal mine extraction gas and ventilation gas enter an air inlet system 240, mixed gas parameters are monitored in real time through an air inlet flow sensor 241, an air inlet flow sensor 242 and an air inlet gas concentration sensor 241, an electric regulating valve is timely controlled, gas enters a start combustion chamber 230 after passing through a forward flow heat storage oxidation bed 210, a start combustion chamber 231 is operated to burn low concentration gas, generated heat is conducted to the forward flow heat storage oxidation bed 210 and a reverse flow heat storage oxidation bed 220 through a high temperature heat pipe I212 and a high temperature heat pipe II 222, and after the temperature of an internal porous heat storage body I213 and a porous heat storage body II 223 of the device reach the minimum temperature requirement of gas heat storage combustion, the device is operated normally.

B. The operation process comprises the following steps: the gas sequentially passes through an air inlet uniform flow chamber 211, an air inlet uniform flow device 217 and a porous heat accumulator I213 in the downstream heat accumulating oxidation bed 210, and is subjected to heat accumulating oxidation in the downstream heat accumulating oxidation bed; after the combustion chamber 230 is started to continue burning, part of the gas enters the countercurrent heat storage oxidation bed 220, and after the rest of the gas is subjected to heat storage oxidation in the porous heat storage body II 223, the rest of the gas sequentially passes through the exhaust homogenizer 227, the exhaust homogenizing chamber 221 and the gas-gas heat exchanger 244 to be discharged out of the device; the exhaust flue gas transfers the rest heat to the intake mixed gas through the high-temperature heat pipe in the gas-gas heat exchanger 244 to preheat the intake gas, thereby saving the fuel consumption of gas heating.

The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, but any simple modification and equivalent variation of the above embodiment according to the technical spirit of the present invention falls within the scope of the present invention.

Claims

1. A coal mine gas unidirectional flow concentration self-adaptive oxidation device is characterized in that: the device comprises an air inlet system (140, 240), a downstream heat accumulating oxidation bed (110, 210), a starting combustion chamber (130, 230), a countercurrent heat accumulating oxidation bed (120, 220) and an exhaust system (150, 250) which are sequentially communicated, wherein the downstream heat accumulating oxidation bed (110, 210), the starting combustion chamber (130, 230) and the countercurrent heat accumulating oxidation bed (120, 220) are arranged in an inverted U-shaped structure; an inlet gas concentration sensor (141,241), inlet gas flow sensors (142, 242), an electric regulating valve I (143,243) and gas-gas heat exchangers (144, 244) are sequentially arranged on the inlet gas systems (140, 240), and mixed gas parameters are monitored in real time and the electric regulating valves I (143, 243) are timely controlled through the inlet gas concentration sensors (141, 241) and the inlet gas flow sensors (142, 242); the gas-gas heat exchanger (144, 244) is divided into two parts by a sealing partition plate, the upper part is connected with the air inlet system (140, 240), the lower part is connected with the exhaust system (150, 250), and the tail end of the air inlet system (140, 240) is communicated with the bottom air inlet of the downstream heat accumulating oxidation bed (110, 210); the bottoms of the downstream heat storage oxidation beds (110, 210) are provided with air inlet uniform flow chambers (111, 211), the upper parts of the air inlet uniform flow chambers (111, 211) are filled with porous heat storages I (113,213), and high-temperature heat pipes I (112, 212) are arranged above the inner parts of the porous heat storages I (113,213); the bottom of the countercurrent heat storage oxidation bed (120, 220) is provided with an exhaust uniform flow chamber (121, 221), the upper part of the exhaust uniform flow chamber (121, 221) is filled with a porous heat storage body II (123, 223), and a high-temperature heat pipe II (122, 222) is arranged above the inside of the porous heat storage body II (123, 223); an internal heat collector (132, 232) is arranged in the starting combustion chamber (130, 230), and a starting combustor (131, 231) is also arranged above the middle part of the starting combustion chamber; the high-temperature heat pipes I (112, 212) and II (122, 222) in the porous heat accumulator I (113,213) and the porous heat accumulator II (123, 223) are respectively connected with the starting combustion chambers (130, 230); the exhaust system (150, 250) is in communication with the counter-current regenerative thermal oxidizer (120, 220) via a gas-to-gas heat exchanger (144, 244).

2. The coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1, wherein the device is characterized in that: a downstream heat collector (114) and a countercurrent heat collector (124) are respectively arranged below the interiors of the porous heat accumulator I (113) and the porous heat accumulator II (123); the concurrent heat collector (114), the internal heat collector (132) and the countercurrent heat collector (124) are all in a loop-shaped layout.

3. A coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1 or 2, characterized in that: the exhaust system (150) is also sequentially connected with an exhaust flow sensor (151), an exhaust gas concentration sensor (152) and an electric regulating valve II (153).

4. The coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1, wherein the device is characterized in that: the porous heat accumulator I (213) and the porous heat accumulator II (223) are internally provided with a plurality of high-temperature heat pipes I (212) and a plurality of high-temperature heat pipes II (222) which are distributed at equal intervals, the side walls of the downstream heat accumulation oxidation bed (210) and the upstream heat accumulation oxidation bed (220) are respectively provided with a plurality of temperature sensors I (215) and a plurality of temperature sensors II (225) at equal intervals, and the tail ends of the temperature sensors I (215) and the temperature sensors II (225) are respectively inserted into the porous heat accumulator I (213) and the porous heat accumulator II (223).

5. The coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1, wherein the device is characterized in that: temperature sensors III (216) and IV (226) are respectively arranged in the air inlet homogenizing chamber (211) and the air outlet homogenizing chamber (221), and the tail ends of the temperature sensors III (216) and IV (226) are respectively positioned in the middle of the air inlet homogenizing chamber (211) and the air outlet homogenizing chamber (221).

6. The coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1, wherein the device is characterized in that: an air inlet flow homogenizing device (217) is arranged between the air inlet flow homogenizing chamber (211) and the porous heat accumulator I (213), and an air outlet flow homogenizing device (227) is arranged between the air outlet flow homogenizing chamber (221) and the porous heat accumulator II (223).

7. The coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1, wherein the device is characterized in that: a temperature sensor V (233) and a temperature sensor VI (234) are respectively arranged on two sides of the starting combustor (231) above the starting combustor (230).

8. The coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1, wherein the device is characterized in that: a plurality of high temperature heat pipes III (245) are also arranged in the gas-gas heat exchanger (244) at intervals.

9. The coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1, wherein the device is characterized in that: the downstream heat accumulating oxidation bed (210), the starting combustion chamber (230) and the countercurrent heat accumulating oxidation bed (220) are jointly arranged in a shell (260) with a heat insulating layer (261); a thickened heat-insulating layer (262) is also arranged between the downstream heat-accumulating oxidation bed (210) and the countercurrent heat-accumulating oxidation bed (220).

10. The coal mine gas unidirectional flow concentration self-adaptive oxidation device according to claim 1, wherein the device is characterized in that: the high-temperature medium outlet (270) of the internal heat collector (232) is sequentially provided with a heat collector outlet pressure sensor (271), a heat collector outlet flow sensor (272) and a heat collector outlet stop valve (273), and the low-temperature medium inlet (280) is sequentially provided with a heat collector inlet pressure sensor (281), a heat collector inlet flow sensor (282) and a heat collector inlet stop valve (283).