CN101915117A - Coal mine methane gas oxidation device - Google Patents
Coal mine methane gas oxidation device Download PDFInfo
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- CN101915117A CN101915117A CN 201010216013 CN201010216013A CN101915117A CN 101915117 A CN101915117 A CN 101915117A CN 201010216013 CN201010216013 CN 201010216013 CN 201010216013 A CN201010216013 A CN 201010216013A CN 101915117 A CN101915117 A CN 101915117A
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- oxidation bed
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Abstract
The invention relates to a coal mine methane gas oxidation device, comprising an outer shell and a honeycomb ceramic oxidation bed, wherein a heat insulation layer is distributed on the inner wall of the outer shell; the upper and lower ends of the honeycomb ceramic oxidation bed are respectively provided with upper and lower rectifying chambers; the side parts of the upper and lower rectifying chambers are provided with ports which are respectively communicated with an intake pipe and an exhaust pipe; the intake pipe and the exhaust pipe are respectively provided with an intake reversing valve, an exhaust reversing valve, an intake pipe temperature sensor, an exhaust pipe temperature sensor, an intake pipe gas concentration sensor and an exhaust pipe gas concentration sensor; the upper and lower parts of the honeycomb ceramic oxidation bed are respectively provided with upper and lower flow homogenizers; the middle part of the honeycomb ceramic oxidation bed is provided with a starting electric heater; the upper and lower parts of the starting electric heater are provided with built-in heat exchangers at intervals; and the back of the shell is provided with an upper rectifying chamber temperature sensor in the middle of the upper rectifying chamber, a temperature sensor at the middle of the honeycomb ceramic oxidation bed and a lower rectifying chamber temperature sensor at the middle of the lower rectifying chamber which are inserted at intervals. The invention has the advantages of compact structure, convenient operation, small occupied area and low investment and operation cost.
Description
Technical field
The present invention relates to coal mine methane gas oxidation device, especially a kind ofly come oxidation and utilize the mining equipment of coal mine wind-lack gas, belong to colliery energy-saving and emission-reduction, safety of coal mines technology and engineering field based on the accumulation of heat principle.
Background technology
In China's conventional energy resource constitutes, about 5.57 trillion tons of coal resources total amount, underground 2000m is with about 30～35,000,000,000,000 m of interior gas (coal bed gas) stock number
3, belong to the country of per capita resources poorness, effectively exploit and utilize coal and gas resources to highlight day by day in the developing critical role of Chinese national economy.Gas is a kind of and coal association, non-renewable resource, and gas also is a kind of cleaning, the energy efficiently simultaneously, and its calorific value can reach 33.5～36.8MJ/m
3, 1m
3Gas is equivalent to the calorific value of 1.3kg standard coal, and it utilizes process can not produce hazardous substancess such as oxynitrides and sulfide.Because the coal seam of China more than 50% is high gas layer, the gas total amount that discharged in the China's coal-mine manufacturing process in 2009 surpasses 15,000,000,000 m
3, but nearly 2/3 gas has then directly entered atmosphere with the form of weary wind, has both wasted the energy resources of a large amount of preciousnesses, has also polluted atmospheric environment.More importantly be, the greenhouse effect of gas (coal bed gas) are 21 times of carbon dioxide, are CO to the destruction of ozone layer
27 times.According to reducing discharging the power purchasing price in the present World Trade Organization, at present in field, international carbon foreign currency market, the CER of carbon per ton can be sold 85 yuans, annual 15000000000 m
3The reduction of discharging of gas and utilization can obtain the income of 17,000,000,000 RMB.At present, along with the enforcement of " reply weather conversion country scheme ", the energy-saving and emission-reduction problem of China has become the grand strategy task of present stage.Therefore, coal mine gas is the comprehensive utilization of ventilation air gas particularly, not only can obtain direct economic well-being of workers and staff aspect gas utilization, can obtain abundant repayment again aspect energy-saving and emission-reduction.
But because the characteristics of coal mine wind-lack gas (capacity is big, gas density is low and fluctuation range big), make as the conventional combustion apparatus of basic fuel normally continous-stable move.At present, the hot counter flow oxidation technology of the many employings of the oxidation utilization of coal mine wind-lack gas, its operating principle is: device at first is heated to the oxidation bed core about 1000 ℃ by auxiliary heater means when starting, the thermal field that formation central temperature height, the similar normal state that the both sides temperature is low distribute.Coal mine methane initially feeds and the honeycomb ceramic heat accumulator of flowing through with a direction, its temperature constantly raises and oxidation rapidly in flow process, with follow-up oxidation bed heating, the gas self-temperature progressively reduces then discharges reactor to high-temperature gas after the oxidation in continuation is flowed.In the process that reaction is carried out, the temperature of gas access side ceramic honey comb constantly descends, and the temperature of outlet side ceramic honey comb constantly raises, and when the entrance side ceramic honey comb was not enough to that coal mine methane is heated to the temperature of gas oxidation reaction, air-flow began commutation.Facts have proved, be higher than at 0.2% o'clock in ventilation air gas concentration, the heat release of gas oxidation reaction can be kept the surface radiating of oxidation bed and the stable operation of oxidation reaction.
At present, have only minority unit to utilize Study on Technology in the oxidation of carrying out coal mine wind-lack gas, patent documentation disclosed " coal mine ventilation air methane oxidation device " (200620081956.X), " mine air-lack mash gas thermal oxidation apparatus " (200810249860.3), " mine air-lack oxidation unit " (200820224339.X) etc. technology all adopted the monolithic heat-exchanger rig, but, easily cause the instability of oxidation bed operation because big capacity monolithic heat exchanger easily makes air-flow and oxidation bed excessive at the temperature drop at heat exchanger rear portion.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point in the prior art, the coal mine methane gas oxidation device that a kind of equipment is simple, compact conformation is reasonable, effects of energy saving and emission reduction is good is provided.
Technical scheme: coal mine methane gas oxidation device of the present invention, comprise that inwall is furnished with the shell of thermal insulation layer, the cavity middle part that is surrounded by the thermal insulation layer is provided with the ceramic honey comb oxidation bed, the ceramic honey comb oxidation bed is piled up by the ceramic heat storage body that is shaped as cube or cuboid and is constituted, and is furnished with some circles, square or polygonal hole on the ceramic heat storage body; Two ends and thermal insulation floor surround rectification chamber, top and rectification chamber, bottom about the ceramic honey comb oxidation bed, the sidepiece of rectification chamber, top and rectification chamber, bottom is equipped with the port that is connected with air inlet pipe and stack respectively, air inlet pipe is provided with and enters the air inlet reversal valve of rectification chamber up and down respectively, stack is provided with and enters the exhaust gas switch-over valve of rectification chamber up and down respectively, the top of ceramic honey comb oxidation bed is provided with the top flow homogenizer, the below is provided with the bottom flow homogenizer, air inlet pipe is provided with intake manifold temperature sensor and air inlet pipe gas concentration sensor, and stack is provided with Tail Pipe Temperature sensor and stack gas concentration sensor; The middle part of ceramic honey comb oxidation bed is provided with the startup electric heater, and the upper and lower that starts electric heater is interval with built-in heat exchanger; Though being provided with, the shell rear section inserts the top rectification room temperature sensor of rectification chamber, top medium position, the temperature pick up of ceramic honey comb oxidation bed medium position, the bottom rectification room temperature sensor of rectification chamber, bottom medium position at interval.
Described top flow homogenizer and bottom flow homogenizer constitute by orifice plate; Described startup electric heater is made of spaced many heating rods and power supply junction plate; Described ceramic heat storage body is changed aluminium, carborundum or zirconium dioxide sintering by three oxygen two and is formed; Described built-in heat exchanger is that simply connected sinuous coil constitutes.
Beneficial effect: can avoid device to maximize skew that laggard exhaust airstream distributes and the instability of the uneven and operation in thermal field in the bed that causes; Thermal field high in the middle of helping forming when device starts, that both sides are low distributes; Built-in heat exchanger adopts many group low capacities, split-type structural and is evenly arranged in the both sides in ceramic honey comb oxidation bed centre, can effectively avoid air-flow and the oxidation bed fluctuation of service that cause excessive at temperature drop when the heat exchanger, and the heat exchanger of split-type structural helps realizing the multistage overheated of heat-obtaining working media, for the utilization of energy is provided convenience; The air inlet-outlet pipe of device all is arranged on an end of oxidation bed device, can make the apparatus structure compactness, rationally, floor space is little.Its major advantage is as follows:
1) in the top and the bottom of oxidation bed intake and exhaust rectification chamber and flow homogenizer are set all, avoided device to maximize skew that laggard exhaust airstream distributes and the instability of the uneven and operation in thermal field in the bed that causes;
2) built-in heat exchanger adopts the both sides of organizing low capacities, split-type structural and being evenly arranged in ceramic honey comb oxidation bed centre more, can effectively avoid air-flow and the oxidation bed fluctuation of service that cause excessive at temperature drop when the heat exchanger, and the heat exchanger of split-type structural helps realizing the multistage overheated of heat-obtaining working media, for the utilization of energy is provided convenience;
3) Zhuan Zhi air inlet-outlet pipe all is arranged on an end of oxidation bed device, can make the apparatus structure compactness, rationally, floor space is little;
What 4) device started only need heat by a spot of electric energy, the ventilation air gas that feeds can be realized in oxidation bed from keeping stable operation, when realizing that ventilation air gas reduces discharging, a certain amount of heat energy can be provided, thereby reach the comprehensive utilization and the energy-saving and emission-reduction of coal mine wind-lack gas.
Description of drawings
Fig. 1 is that structure master of the present invention looks generalized section;
Fig. 2 is the A-A sectional structure chart of Fig. 1;
Fig. 3 is the B-B sectional structure chart of Fig. 1;
Fig. 4 is the C-C sectional structure chart of Fig. 1.
Among the figure: the 1-air inlet pipe, 2-air inlet reversal valve, 3-shell, 4-thermal insulation layer, rectification chamber, 5-top, 6-top flow homogenizer, 7-top rectification room temperature sensor, 8-temperature pick up, 9-ceramic honey comb oxidation bed, the built-in heat exchanger of 10-, 11-starts electric heater, rectification chamber, 12-bottom, 13-bottom rectification room temperature sensor, 14-bottom flow homogenizer, 15-intake manifold temperature sensor, 16-air inlet pipe gas concentration sensor, 17-stack gas concentration sensor, the 18-stack, 19-Tail Pipe Temperature sensor, 20-exhaust gas switch-over valve.
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
Shown in Figure 1, coal mine methane gas oxidation device is vertical structure to be arranged, mainly by ceramic honey comb oxidation bed 9, intake and exhaust rectification chamber, top and the bottom 5 and 12 and top and the bottom flow homogenizer 6 and 14, start electric heater 11, built-in heat exchanger 10, air inlet- outlet pipe 1 and 18 and various observing and controlling element form.Device comprises the metal shell 3 that is the side spill, and metal shell 3 inner surfaces are lined with the moderate thermal insulation layer 4 of thickness, the inner ceramic honey comb oxidation bed 9 that is made of heat storage of filling; Ceramic honey comb oxidation bed 9 is piled up by the ceramic heat storage body that is shaped as cube or cuboid and is constituted, and ceramic heat storage body is changed aluminium Al by three oxygen two
2O
3, carborundum SiC or zirconium dioxide ZrO
2Sintering forms, and is furnished with some circles, square or polygonal hole on the ceramic heat storage body.The two ends up and down of ceramic honey comb oxidation bed 9 and thermal insulation floor 4 surround rectification chamber, top 5 and rectification chamber, bottom 12, with the uniformity that guarantees that air-flow flows in honeycomb ceramic heat accumulator, the instability of thermal field inequality and operation in the bed that the skew of avoiding device maximization back to distribute owing to the intake and exhaust air-flow causes.The sidepiece of rectification chamber, top 5 and rectification chamber, bottom 12 is equipped with the port that is connected with air inlet pipe 1 and stack 18 respectively; Shown in Figure 2, air inlet pipe 1 is provided with and enters the air inlet reversal valve 2 of rectification chamber up and down respectively, stack 18 is provided with and enters the exhaust gas switch-over valve 20 of rectification chamber up and down respectively, air inlet pipe 1 is provided with intake manifold temperature sensor 15 and air inlet pipe gas concentration sensor 16, and stack 18 is provided with Tail Pipe Temperature sensor 19 and stack gas concentration sensor 17; Shown in Figure 3, the top of ceramic honey comb oxidation bed 9 is provided with top flow homogenizer 6, and the below of ceramic honey comb oxidation bed 9 is provided with bottom flow homogenizer 14, and top and the bottom current equalizer 6 and 14 constitutes by orifice plate; Shell 3 rear sections are provided with inserts the top rectification room temperature sensor 7 of rectification chamber, top 5 medium positions, the temperature pick up 8 of ceramic honey comb oxidation bed 9 medium positions, the bottom rectification room temperature sensor 13 of rectification chamber, bottom 12 medium positions at interval; The middle part of ceramic honey comb oxidation bed 9 is provided with startup electric heater 11, starts electric heater 11 and is installed on the center of ceramic honey comb oxidation bed 9 in the mode that embeds, and distributes so that form middle thermal field high, that both sides are low when device starts; Starting electric heater 11 is made of spaced many heating rods and power supply junction plate.The upper and lower that starts electric heater 11 is interval with built-in heat exchanger 10, and built-in heat exchanger 10 adopts two groups of low capacities, split-type structurals and is evenly arranged in the both sides in ceramic honey comb oxidation bed 9 centres, two every group.Shown in Figure 4, built-in heat exchanger 10 is that simply connected sinuous coil constitutes, 4 built-in heat exchangers 10 are with two groups of embedded both sides, oxidation bed center that are distributed in, both can effectively absorb the thermal expansion of heat exchanger, can effectively avoid air-flow and the oxidation bed fluctuation of service that cause excessive again at temperature drop when the heat exchanger, and the heat exchanger of split-type structural helps realizing the multistage overheated of heat-obtaining working media, for the utilization of energy is provided convenience.The composition of TT﹠C system comprises and is arranged on the indoor temperature pick up of rectification, is installed in a plurality of temperature pick ups in the ceramic honey comb oxidation bed, be installed in temperature pick up, gas concentration sensor and intake and exhaust airflow-reversing control valve on the intake and exhaust pipeline, wherein the temperature pick up of each measuring point is to monitor the Temperature Distribution in the oxidation bed, and intake and exhaust commutation control valve is used to control automatic switchover the stablizing from keeping operation with implement device of air flow direction in the oxidation bed.
The course of work: at first ceramic honey comb oxidation bed 9 heat storage cores are heated to about 1000 ℃ the thermal field that formation central temperature height, the similar normal state that the both sides temperature is low distribute by starting electric heater 11.Closing to start electric heater 11 and regulate the intake and exhaust reversal valve makes coal mine wind-lack gas initially feed with a direction, after rectification, evenly enter ceramic honey comb oxidation bed 9, gas is constantly raise and oxidation rapidly by the heating-up temperature of heat storage in flow process, the high-temperature gas that produces in continuing to flow heats follow-up heat storage, the gas self-temperature progressively reduces, and discharges from stack.In the process that reaction is carried out, the temperature of gas access side heat storage constantly descends, the temperature of outlet side heat storage constantly raises, when the entrance side heat storage is not enough to that coal mine methane is heated to the temperature of gas oxidation reaction, automatic control downstream at reversal valve begins commutation, thereby implement device is stable from keeping operation.
Claims (5)
1. coal mine methane gas oxidation device, it is characterized in that: it comprises that inwall is furnished with the shell of thermal insulation layer (4) (3), the cavity middle part that is surrounded by thermal insulation layer (4) is provided with ceramic honey comb oxidation bed (9), ceramic honey comb oxidation bed (9) is piled up by the ceramic heat storage body that is shaped as cube or cuboid and is constituted, and is furnished with some circles, square or polygonal hole on the ceramic heat storage body; The two ends up and down of ceramic honey comb oxidation bed (9) and thermal insulation floor (4) surround rectification chamber, top (5) and rectification chamber, bottom (12), the sidepiece of rectification chamber, top (5) and rectification chamber, bottom (12) is equipped with the port that is connected with air inlet pipe (1) and stack (18) respectively, air inlet pipe (1) is provided with and enters the air inlet reversal valve (2) of rectification chamber up and down respectively, stack (18) is provided with and enters the exhaust gas switch-over valve (20) of rectification chamber up and down respectively, the top of ceramic honey comb oxidation bed (9) is provided with top flow homogenizer (6), the below is provided with bottom flow homogenizer (14), air inlet pipe (1) is provided with intake manifold temperature sensor (15) and air inlet pipe gas concentration sensor (16), and stack (18) is provided with Tail Pipe Temperature sensor (19) and stack gas concentration sensor (17); The middle part of ceramic honey comb oxidation bed (9) is provided with and starts electric heater (11), and the upper and lower that starts electric heater (11) is interval with built-in heat exchanger (10); Shell (3) inserts the top rectification room temperature sensor (7) of rectification chamber, top (5) medium position, the temperature pick up (8) of ceramic honey comb oxidation bed (9) medium position, the bottom rectification room temperature sensor (13) of rectification chamber, bottom (12) medium position at interval though the rear section is provided with.
2. coal mine methane gas oxidation device according to claim 1 is characterized in that: described top flow homogenizer (6) and bottom flow homogenizer (14) constitute by orifice plate.
3. coal mine methane gas oxidation device according to claim 1 is characterized in that: described startup electric heater (11) is made of spaced many heating rods and power supply junction plate.
4. coal mine methane gas oxidation device according to claim 1 is characterized in that: described ceramic heat storage body is changed aluminium (Al by three oxygen two
2O
3), carborundum (SiC) or zirconium dioxide (ZrO
2) sintering forms.
5. coal mine methane gas oxidation device according to claim 1 is characterized in that: described built-in heat exchanger (10) constitutes for simply connected sinuous coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102160134A CN101915117B (en) | 2010-06-25 | 2010-06-25 | Coal mine methane gas oxidation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102160134A CN101915117B (en) | 2010-06-25 | 2010-06-25 | Coal mine methane gas oxidation device |
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| CN101915117A true CN101915117A (en) | 2010-12-15 |
| CN101915117B CN101915117B (en) | 2012-02-01 |
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|---|---|---|---|
| CN2010102160134A Expired - Fee Related CN101915117B (en) | 2010-06-25 | 2010-06-25 | Coal mine methane gas oxidation device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205207A (en) * | 2011-04-11 | 2011-10-05 | 山东理工大学 | Coal mine methane preheating catalytic oxidation device with multiple reaction chambers |
| CN103470581A (en) * | 2013-09-13 | 2013-12-25 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Radial gas rectifier |
| CN104481576A (en) * | 2014-11-12 | 2015-04-01 | 华中科技大学 | Coal mine gas low emission catalytic oxidation heat supply system |
| WO2015074490A1 (en) * | 2013-11-21 | 2015-05-28 | 中国矿业大学 | Self-regenerative integrated device for synergetic oxidation of low-concentration gas and ventilation gas in coal mine |
| US10577883B2 (en) | 2018-01-29 | 2020-03-03 | ETTER Engineering Company, Inc. | Weatherization system for a wellhead emission reduction system |
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2010
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205207A (en) * | 2011-04-11 | 2011-10-05 | 山东理工大学 | Coal mine methane preheating catalytic oxidation device with multiple reaction chambers |
| CN102205207B (en) * | 2011-04-11 | 2013-06-19 | 山东理工大学 | Coal mine methane preheating catalytic oxidation device with multiple reaction chambers |
| CN103470581A (en) * | 2013-09-13 | 2013-12-25 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Radial gas rectifier |
| CN103470581B (en) * | 2013-09-13 | 2015-12-02 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of radial gas rectifier |
| WO2015074490A1 (en) * | 2013-11-21 | 2015-05-28 | 中国矿业大学 | Self-regenerative integrated device for synergetic oxidation of low-concentration gas and ventilation gas in coal mine |
| US20160136575A1 (en) * | 2013-11-21 | 2016-05-19 | China University Of Mining And Technology | Self-regenerative integrated device for synergetic oxidation of low-concentration gas and ventilation gas in coal mine |
| AU2014352437B2 (en) * | 2013-11-21 | 2016-06-16 | China University Of Mining And Technology | Self-regenerative integrated device for synergetic oxidation of low-concentration gas and ventilation gas in coal mine |
| RU2613378C1 (en) * | 2013-11-21 | 2017-03-16 | Чайна Юниверсити Оф Майнинг Энд Текнолоджи | Self-regenerative integrated device for synergetic oxidation of low concentration gas and ventilation gas in coal mine |
| US10022668B2 (en) * | 2013-11-21 | 2018-07-17 | China University Of Mining And Technology | Self-regenerative integrated device for synergetic oxidation of low-concentration gas and ventilation gas in coal mine |
| CN104481576A (en) * | 2014-11-12 | 2015-04-01 | 华中科技大学 | Coal mine gas low emission catalytic oxidation heat supply system |
| US10577883B2 (en) | 2018-01-29 | 2020-03-03 | ETTER Engineering Company, Inc. | Weatherization system for a wellhead emission reduction system |
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