CN204005985U - A kind of extremely low concentration coal mine gas burner - Google Patents
A kind of extremely low concentration coal mine gas burner Download PDFInfo
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- CN204005985U CN204005985U CN201420426776.5U CN201420426776U CN204005985U CN 204005985 U CN204005985 U CN 204005985U CN 201420426776 U CN201420426776 U CN 201420426776U CN 204005985 U CN204005985 U CN 204005985U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model relates to a kind of extremely low concentration coal mine gas burner, and the extremely low concentration coal mine gas that the methane concentration of usining is 3%～5%, as fuel, produces 650 ℃～1050 ℃ high-temperature flue gas and recycles after burning.Innovative point of the present utility model is to arrange heat-storing material preheating section (10) and heat-storing material burning zone (11); The first preheating in heat-storing material preheating section (10) of extremely low concentration coal mine gas completes combustion process and heats heat-storing material burning zone (11) in heat-storing material burning zone (11); Heat-storing material burning zone (11) and high-temperature flue gas are to heat-storing material preheating section (10) and do not fire extremely low concentration coal mine gas transferring heat, to maintain continuous, smooth combustion.The utility model is usingd the extremely low concentration gas that cannot burn under natural conditions as fuel, efficiently solves methane concentration and reduces discharging problem lower than 9% coal mine gas, and have methane concentration fluctuation strong adaptability and heat recovery efficiency advantages of higher.
Description
Technical field
The utility model belongs to control of coalmine gas, emission-reduction technology field, particularly relate to a kind of extremely low concentration coal mine gas burner, using the extremely low concentration coal mine gas of methane concentration 3%～5% as fuel, by extremely low concentration coal mine gas is maintained to smooth combustion in the inner preheating of burner, produce 650 ℃～1050 ℃ high-temperature flue gas, flue gas heat can be for recycling.This technology is applicable to the methane gas of processing, utilizing the extraction of the high and low negative-pressure vacuum pump of coal mine gas drainage pumping plant institute to go out.
Background technology
The methane gas that the extraction of current coal mine gas drainage pumping plant goes out, its methane concentration is generally 3%～30%.Can be for internal combustion engine generating higher than 9% drawing-off gas except part methane concentration, methane concentration does not have ripe processing, utilizes technology lower than 9% drawing-off gas, all discharges at present atmosphere.And internal combustion engine generation technology still do not solve fault rate high, be subject to the problems such as gas density influence of fluctuations is large, make applying of internal combustion engine generation technology be subject to a lot of restrictions.The explosion limit scope of methane, air pre-mixing gas is 5%～15%; For the extremely low concentration coal mine gas of methane concentration 3%～5%, owing to existing excessive air thereby adiabatic combustion temperature to reduce, can not burn under field conditions (factors), explode, apply, intractability is larger.Methane concentration can adopt regenerative oxidation technology to process lower than 1.2% coal mine gas, but has the problems such as device is less economical, the thermal efficiency is low, maintenance maintenance workload is large.
Approximately 2,800 ten thousand tons/year, the methane that the annual ventilation of whole world coal mining and extraction are discharged, expects 2015 and can reach 3,200 ten thousand tons/year.According to statistics, China's coal-mine reaches 19,000,000,000 m to the methane content of airborne release every year
3, rank first in the world, account for Chinese industrial produce in methane emission 1/3rd, and the methane that wherein enters atmosphere by colliery drainage system is about 60～7,500,000,000 m
3, be 50%～63% of West-East National Gas Transmission Project design year displacement.Methane has very strong greenhouse effects, is equivalent to 21 times of carbon dioxide greenhouse effects, is 7 times of carbon dioxide to the damage capability of ozone.The direct discharge of coal mine gas causes huge problem of environmental pollution in waste mass energy.
Summary of the invention
The purpose of this utility model is: a kind of extremely low concentration coal mine gas burner is provided, the extremely low concentration coal mine gas that can not only guarantee methane concentration 3%～5% is continuously, smooth combustion and methyl hydride combustion efficiency is higher than 99.5%, also solved internal combustion engine generation technology fault rate high, be subject to the problems such as gas density influence of fluctuations is large and regenerative oxidation Technical Economy is poor, the thermal efficiency is low, maintenance maintenance workload is large.
In order to overcome the shortcoming and defect of prior art, the utility model is that the technical scheme that its technical problem of solution adopts is: a kind of extremely low concentration coal mine gas burner, comprise: drawing-off gas pipeline, security conveyer, concentration control apparatus, air blast, gas combustion device body, waste heat boiler, boiler exhaust gas air-introduced machine and chimney, it is characterized in that, described drawing-off gas pipeline is communicated with described concentration control apparatus through security conveyer, described air blast is communicated with described concentration control apparatus through airflow pipe I, the output of described concentration control apparatus is communicated with the gas input port of described gas combustion device body through pipeline, wherein,
--in the housing of described gas combustion device body, be provided with recuperator, the inner side of described recuperator is provided with heat-storing material preheating section and heat-storing material burning zone; In one end of described gas combustion device body, be provided with startup heater, the other end is provided with high-temperature flue gas outlet, in the housing sidewall of the gas combustion device body near described high-temperature flue gas outlet, is provided with described gas input port; The end wall of one end that is provided with described gas input port of one end of described recuperator and described gas combustion device body is tightly connected, and another end wall of the other end of described recuperator and described gas combustion device body leaves certain interval;
--described high-temperature flue gas outlet is communicated with waste heat boiler, boiler exhaust gas air-introduced machine, chimney successively.
Further, in extremely low concentration coal mine gas burner of the present utility model, described drawing-off gas pipeline is provided with gas valve door.
Further, in extremely low concentration coal mine gas burner of the present utility model, described heat-storing material preheating section and heat-storing material burning zone adopt the Extruded Monolithic Celluar Ceramics of corundum material, or adopt the bead accumulation of the external diameter 4mm to 20mm of corundum or silicon carbide material to form.
Further, in extremely low concentration coal mine gas burner of the present utility model, described startup heater comprises air input and fuel input, and described air blast is communicated with described air input through airflow pipe II, described fuel input termination fuel channel; During described gas combustion device cold start, startup heater heats heat-storing material preheating section by combustion product gases and heat-storing material burning zone reaches more than 800 ℃, then close and start heater and pass into extremely low concentration coal mine gas, complete burner pipeline start up by preheating.Preferably, the fuel that described startup heater uses is natural gas or diesel oil.
Further, in extremely low concentration coal mine gas burner of the present utility model, on described airflow pipe I, airflow pipe II, fuel channel, be provided with by-pass valve control.
Further, in extremely low concentration coal mine gas burner of the present utility model, described waste heat boiler comprises radiation heating section, convection current heating section and water-cooling wall, and described radiation heating section is arranged at the bottom of convection current heating section; One end of described radiation heating section is communicated with described high-temperature flue gas outlet, and the other end is communicated with the import of described convection current heating section, and the outlet of described convection current heating section is communicated with described boiler exhaust gas air-introduced machine through pipeline.Further, the cooling water inlet of described water-cooling wall is arranged near the import of described radiation heating section, and the hot water of described water-cooling wall or steam (vapor) outlet are arranged near the outlet of described convection current heating section.
Extremely low concentration coal mine gas burner of the present utility model, its innovative point is: one, heat-storing material preheating section and heat-storing material burning zone are set; Heat-storing material preheating section and heat-storing material burning zone adopt the Extruded Monolithic Celluar Ceramics of corundum material, also can adopt the bead accumulation of corundum or silicon carbide material, external diameter 4mm to 20mm to form; Colliery drawing-off gas through drawing-off gas pipeline, gas valve door, security conveyer enters concentration control apparatus with the air from air blast simultaneously, becomes the extremely low concentration coal mine gas of methane concentration 3%～5% after mixing; Enter extremely low concentration coal mine gas in gas combustion device body and first in heat-storing material preheating section, absorb heat, take fire after reaching the ignition temperature of extremely low concentration coal mine gas; Extremely low concentration coal mine gas after lighting is flowed through, and heat-storing material burning zone completes combustion process and release portion heat heats heat-storing material burning zone; The heat-storing material burning zone that temperature is higher and high-temperature flue gas are by modes such as conduction, convection current and radiation, constantly to the lower heat-storing material preheating section of temperature with do not fire extremely low concentration coal mine gas transferring heat, so that fire extremely low concentration coal mine gas, do not reach ignition temperature; The high-temperature flue gas (650 ℃～1050 ℃ of flue-gas temperatures) flowing out from heat-storing material burning zone enters waste heat boiler and reclaims heat, enters atmosphere afterwards by boiler exhaust gas air-introduced machine, chimney.Two, in gas combustion device body, heat-storing material preheating section and heat-storing material burning zone outer setting recuperator; Recuperator enters the extremely low concentration coal mine gas (being tentatively preheated to 50 ℃～150 ℃ at this) in gas combustion device body for preliminary preheating through concentration control apparatus, reduce the radiation loss of gas combustion device body simultaneously, reduce gas combustion device body hull-skin temperature.Three, at gas combustion device body head, startup heater is set; During the cold start of gas combustion device, start heater and using the gases such as natural gas, diesel oil or liquid fuel as the energy, by combustion product gases, heat heat-storing material preheating section and heat-storing material burning zone reaches more than 800 ℃, then close and start heater and pass into extremely low concentration coal mine gas, complete burner pipeline start up by preheating.
The utility model has the advantage of: one, burner is usingd the extremely low concentration coal mine gas of the methane concentration 3%～5% that cannot burn under natural conditions as fuel, reclaim, utilize mass energy, for solving methane concentration, lower than 9% coal mine gas reduction of discharging problem, provide a kind of technical scheme simultaneously; Two, with the comparison of internal combustion engine generation technology, the strong adaptability of burner to methane concentration fluctuation, coal dust and water, can regulate running status, movement-less part failure rate is low automatically; Three,, with the comparison of regenerative oxidation technology, burner equipment investment is few, heat recovery efficiency is high, Technical Economy is good, simple in structure, maintenance maintenance convenient.
Accompanying drawing explanation
The utility model Fig. 1 is the systematic schematic diagram of the utility model embodiment.
Wherein, drawing-off gas pipeline (1), gas valve door (2), security conveyer (3), concentration control apparatus (4), air blast (5), gas combustion device body (6), recuperator (7), fuel channel (8), startup heater (9), heat-storing material preheating section (10), heat-storing material burning zone (11), waste heat boiler (12), radiation heating section (121), convection current heating section (122), water-cooling wall (123), boiler exhaust gas air-introduced machine (13), chimney (14).
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
Fig. 1 is a kind of embodiment of the present utility model.Extremely low concentration coal mine gas burner of the present utility model, comprise drawing-off gas pipeline 1, security conveyer 3, concentration control apparatus 4, air blast 5, gas combustion device body 6, waste heat boiler 12, boiler exhaust gas air-introduced machine 13 and chimney 14, drawing-off gas pipeline 1 is communicated with concentration control apparatus 4 through security conveyer 3, air blast 5 is communicated with concentration control apparatus 4 through airflow pipe I, through drawing-off gas pipeline 1, the colliery drawing-off gas of security conveyer 3 passes into concentration control apparatus 4 with the air from air blast 5 simultaneously, after mixing, become the extremely low concentration coal mine gas of methane concentration 3%～5% in concentration control apparatus 4, the output of concentration control apparatus 4 is communicated with the gas input port of gas combustion device body 6 through pipeline.
In the housing of gas combustion device body 6, be provided with recuperator 7, the inner side of recuperator 7 is provided with heat-storing material preheating section 10 and heat-storing material burning zone 11; In one end of gas combustion device body 6, be provided with and start heater 9, the other end is provided with high-temperature flue gas outlet, in the housing sidewall of the gas combustion device body 6 near high-temperature flue gas outlet, is provided with gas input port; The end wall of one end that is provided with gas input port of one end of recuperator 7 and gas combustion device body 6 is tightly connected, and another end wall of the other end of recuperator 7 and gas combustion device body 6 leaves certain interval.High-temperature flue gas outlet is communicated with waste heat boiler 12, boiler exhaust gas air-introduced machine 13, chimney 14 successively.
In extremely low concentration coal mine gas burner of the present utility model, drawing-off gas pipeline 1 is provided with gas valve door 2.On airflow pipe I, airflow pipe II, fuel channel 8, be provided with by-pass valve control.
In extremely low concentration coal mine gas burner of the present utility model, waste heat boiler 12 comprises radiation heating section 121, convection current heating section 122 and water-cooling wall 123, and radiation heating section 121 is arranged at the bottom of convection current heating section 122; One end of radiation heating section 121 is communicated with high-temperature flue gas outlet, and the other end is communicated with the import of convection current heating section 122, and the outlet of convection current heating section 122 is communicated with boiler exhaust gas air-introduced machine 13 through pipeline; The cooling water inlet of water-cooling wall 123 is arranged near the import of radiation heating section 121, and the hot water of water-cooling wall 123 or steam (vapor) outlet are arranged near the outlet of convection current heating section 122.
In extremely low concentration coal mine gas burner of the present utility model, at gas combustion device body 6 heads, arrange and start heater 9; Start heater 9 and comprise air input and fuel input, air blast 5 is communicated with air input through airflow pipe II, fuel input termination fuel channel 8, during the cold start of gas combustion device, start heater 9 and using the gases such as natural gas, diesel oil or liquid fuel as the energy, by combustion product gases, heat heat-storing material preheating section 10 and heat-storing material burning zone 11 reaches more than 800 ℃, then close and start heater 9 and pass into extremely low concentration coal mine gas, complete burner pipeline start up by preheating; While starting heater 9 work, by fuel channel 8, provide fuel, by air blast 5, provide combustion air.
At gas combustion device body 6 inner chamber middle parts, heat-storing material preheating section 10 and heat-storing material burning zone 11 are set, for strengthening high-temperature flue gas to not firing extremely low concentration coal mine gas transferring heat, maintain lasting, smooth combustion.Heat-storing material preheating section 10 and heat-storing material burning zone 11 adopt the Extruded Monolithic Celluar Ceramics of corundum material to pile up, and also can adopt the bead accumulation of corundum or silicon carbide material, external diameter 4mm to 20mm to form.In gas combustion device body 6, heat-storing material preheating section 10 and heat-storing material burning zone 11 outer setting recuperators 7, for preliminary preheating, enter the extremely low concentration coal mine gas in gas combustion device body 6, thereby improve extremely low concentration coal mine gas, finally enter the temperature before heat-storing material burning zone 11; The radiation loss that recuperator 7 can also reduce gas combustion device body 6 is simultaneously set, reduces the hull-skin temperature of gas combustion device body 6.
Colliery drawing-off gas through drawing-off gas pipeline 1, gas valve door 2, security conveyer 3 enters concentration control apparatus 4 with the air from air blast 5 simultaneously, becomes the extremely low concentration coal mine gas of methane concentration 3%～5% after mixing.Extremely low concentration coal mine gas enters after gas combustion device body 6, first by recuperator 7, is tentatively preheated to 50 ℃～150 ℃, then in the interior continuation of heat-storing material preheating section 10 heat absorption, takes fire after reaching the ignition temperature of extremely low concentration coal mine gas; Extremely low concentration coal mine gas after lighting is flowed through, and heat-storing material burning zone 11 completes combustion process and release portion heat heats heat-storing material burning zone 11; The heat-storing material burning zone 11 that temperature is higher and high-temperature flue gas are by modes such as conduction, convection current and radiation, constantly to the lower heat-storing material preheating section 10 of temperature with do not fire extremely low concentration coal mine gas transferring heat, so that fire extremely low concentration coal mine gas, do not continue to reach ignition temperature, maintain continuity, the stability of burning.650 ℃～1050 ℃ of the high-temperature flue-gas that flow out from heat-storing material burning zone 11 enter waste heat boiler 12 and reclaim heats, enter atmosphere afterwards by boiler exhaust gas air-introduced machine 13, chimney 14.
These are only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in scope of the present utility model.
Claims (7)
1. an extremely low concentration coal mine gas burner, comprise: drawing-off gas pipeline (1), security conveyer (3), concentration control apparatus (4), air blast (5), gas combustion device body (6), waste heat boiler (12), boiler exhaust gas air-introduced machine (13) and chimney (14), it is characterized in that, described drawing-off gas pipeline (1) is communicated with described concentration control apparatus (4) through security conveyer (3), described air blast (5) is communicated with described concentration control apparatus (4) through airflow pipe I, the output of described concentration control apparatus (4) is communicated with the gas input port of described gas combustion device body (6) through pipeline, wherein,
--in the housing of described gas combustion device body (6), be provided with recuperator (7), the inner side of described recuperator (7) is provided with heat-storing material preheating section (10) and heat-storing material burning zone (11); In one end of described gas combustion device body (6), be provided with and start heater (9), the other end is provided with high-temperature flue gas outlet, in the housing sidewall of the gas combustion device body (6) near described high-temperature flue gas outlet, is provided with described gas input port; The end wall of one end that is provided with described gas input port of one end of described recuperator (7) and described gas combustion device body (6) is tightly connected, and another end wall of the other end of described recuperator (7) and described gas combustion device body (6) leaves certain interval;
--described high-temperature flue gas outlet is communicated with waste heat boiler (12), boiler exhaust gas air-introduced machine (13), chimney (14) successively.
2. extremely low concentration coal mine gas burner according to claim 1, is characterized in that, described drawing-off gas pipeline (1) is provided with gas valve door (2).
3. extremely low concentration coal mine gas burner according to claim 1, it is characterized in that, described heat-storing material preheating section (10) and heat-storing material burning zone (11) adopt the Extruded Monolithic Celluar Ceramics of corundum material, or adopt the bead accumulation of the external diameter 4mm to 20mm of corundum or silicon carbide material to form.
4. according to the extremely low concentration coal mine gas burner described in claims 1 to 3 any one, it is characterized in that, described startup heater (9) comprises air input and fuel input, described air blast (5) is communicated with described air input through airflow pipe II, described fuel input termination fuel channel (8).
5. according to the extremely low concentration coal mine gas burner described in claims 1 to 3 any one, it is characterized in that, described airflow pipe I, airflow pipe II, fuel channel are provided with by-pass valve control on (8).
6. according to the extremely low concentration coal mine gas burner described in claims 1 to 3 any one, it is characterized in that, described waste heat boiler (12) comprises radiation heating section (121), convection current heating section (122) and water-cooling wall (123), and described radiation heating section (121) is arranged at the bottom of convection current heating section (122); One end of described radiation heating section (121) is communicated with described high-temperature flue gas outlet, the other end is communicated with the import of described convection current heating section (122), and the outlet of described convection current heating section (122) is communicated with described boiler exhaust gas air-introduced machine (13) through pipeline.
7. extremely low concentration coal mine gas burner according to claim 6, it is characterized in that, the cooling water inlet of described water-cooling wall (123) is arranged near the import of described radiation heating section (121), and the hot water of described water-cooling wall (123) or steam (vapor) outlet are arranged near the outlet of described convection current heating section (122).
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| CN201420426776.5U CN204005985U (en) | 2014-07-30 | 2014-07-30 | A kind of extremely low concentration coal mine gas burner |
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| CN201420426776.5U CN204005985U (en) | 2014-07-30 | 2014-07-30 | A kind of extremely low concentration coal mine gas burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628771A (en) * | 2020-12-23 | 2021-04-09 | 山东科技大学 | Gas heat storage oxidation high-temperature flue gas molten salt heat exchange system and method |
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2014
- 2014-07-30 CN CN201420426776.5U patent/CN204005985U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628771A (en) * | 2020-12-23 | 2021-04-09 | 山东科技大学 | Gas heat storage oxidation high-temperature flue gas molten salt heat exchange system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20180730 |