CN101413398A - Heating start-up system of mine ventilation air methane oxidized apparatus - Google Patents
Heating start-up system of mine ventilation air methane oxidized apparatus Download PDFInfo
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- CN101413398A CN101413398A CNA2008101592966A CN200810159296A CN101413398A CN 101413398 A CN101413398 A CN 101413398A CN A2008101592966 A CNA2008101592966 A CN A2008101592966A CN 200810159296 A CN200810159296 A CN 200810159296A CN 101413398 A CN101413398 A CN 101413398A
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Abstract
The invention relates to a heating startup system for a coal mine ventilation air methane oxidizer and belongs to the technical field of low concentration methane reverse-flow oxidation. A hot air generation and adjustment system consists of a fan, a flow control valve, an air inlet, a burner, a hot air temperature adjusting chamber, a thermoelectric couple and ultrahigh temperature valves and is arranged on an external part of an oxidizer body. A hot air distribution header pipe is arranged in a central part of the inside of the oxidizer body and is inserted into a hole on a ceramic heat accumulator. Inlet ends of the hot air distribution header pipe are connected through the ultrahigh temperature valves. Two sides of the hot air distribution header pipe are connected with a plurality of hot air distribution branch pipes which are inserted in holes on the ceramic heat accumulator. To start heating, high temperature generated by the burner and air supplied by the fan are mixed in the hot air temperature adjusting chamber and, after temperature adjustment, heat accumulating ceramic through the hot air distribution header and hot air distribution branch pipes. The system has the advantages of high reliability, low price, easy maintenance, flexible fuel, small power load and so on and improves the stability of the operation of an oxidizer.
Description
Technical field
The present invention relates to a kind of heating start-up system of mine ventilation air methane oxidized apparatus, belong to low-concentration methane counter flow oxidation technical field.
Background technology
The main component of coal mine gas is a methane, is the gas energy of high-quality cleaning, but also is simultaneously potential safety hazard maximum in the Coal Production.In order to improve the safety of Coal Production, adopt a large amount of the ventilation to discharge coal mine gas (being called mine air-lack) usually.The methane in the mine air-lack is not attempted reclaiming and handle in nearly all colliery, and directly it is discharged among the atmosphere, and this not only causes the huge waste of the energy, and atmospheric environment has been caused serious pollution.Methane is a kind of greenhouse gases, is 21 times of carbon dioxide in the methane greenhouse effect in 100 years.At present, the annual methane total amount by weary wind discharging in the whole world is estimated as 15,200,000,000 m
3, and the annual methane by weary wind discharging of China reaches 9,100,000,000 m
3, be the maximum industrial emission source of methane.Mine ventilation gas has following three characteristics: (1) wind discharge capacity is huge, and the ventilation of a typical mine master air outlet is 100-250m
3/ s; (2) gas density is generally less than 1%; (3) the gas density fluctuation range is big.These characteristics have determined mine air-lack mash gas to be difficult to utilize conventional burners directly to burn under the situation of auxiliary fuel not having.At present, effectively utilizing the method for mine air-lack mash gas is the counter flow oxidation technology.The counter flow oxidation technology can be divided into two kinds of hot counter-current reactor and catalysis counter-current reactors according to oxidation mechanism.The basic functional principle of these two kinds of reactors is identical substantially with structure, and the main distinction is that the catalysis counter-current reactor has used oxidation catalyst, has reduced the needed temperature of gas oxidation, but has also increased considerably equipment cost and maintenance cost.MEGTEC company adopts the methane in hot counter-current reactor (VOCSIDIZER) the processing mine air-lack, and reclaims its energy.VOCSIDIZER adopts the regenerated heat exchange principle between gas and the heat exchange medium Solid Bed, at first heat exchange medium Solid Bed (ceramic honey comb) is heated to about 1000 ℃ with electric heater, mine air-lack is with a direction inflow and pass through reactor, gas is heated by thermal storage ceramic, temperature improves constantly, until methane oxidation.Then, the hot gas of oxidation continues to move to the another side of bed, and heat is fallen in heat transferred thermal storage ceramic gradually.Along with constantly entering of gas, reaction bed inlet side temperature reduces gradually, and the outlet side temperature raises gradually.Do not have enough heats gas to be heated to before the oxidizing temperature at entrance side, begin commutation, gas flow is reversed.The key of this reactor is will be with the continuous conversion direction of motion of sending in the reactor of gas, makes the air inlet intensification of absorbing heat in thermal accumulator, to guarantee keeping certainly of oxidizing process." coal mine ventilation air methane oxidation device " of China exploitation (200620081956.X), its principle and VOCSIDIZER are basic identical.Above-mentioned several counter flow oxidation devices all are to adopt electrical heating startup method, and heating element is the electric heating element heating alloy, are embedded in the thermal storage ceramic at oxidation bed middle part.Energising heating during startup stops heating after reaching the methane oxidation reaction temperature, is undertaken from keeping by methane oxidation reaction liberated heat.But there is following shortcoming in this mode of heating: after electric heater stopped heating, electric heater was in the high-temperature region with oxidation atmosphere for a long time (1), and the easy oxidation of heating wire becomes fragile, even fracture, lost the function that starts once more; (2) heating wire directly is embedded in the ceramic heat storage body, and the ceramic heat-storing height can cause ceramic heat storage body localized heat stress excessive more than 100 ℃ around the electrical heating wire surface temperature ratio, reduces the ceramic heat-storing body life time; (3) heating wire maintenance and replacing are inconvenient; (4) power of separate unit oxidation unit electric heater is hundreds of kilowatts, has increased the colliery power load.
Summary of the invention
Purpose of the present invention is exactly to overcome the shortcoming that above-mentioned electrical heating starts, and a kind of heating start-up system of mine ventilation air methane oxidized apparatus is developed and provided in innovation.Its technical scheme is:
Comprise that hot blast produces and regulating system, hot blast distribution system two large divisions, it is characterized in that: hot blast produces with regulating system and comprises blower fan, flow control valve, the air air intake, burner, the hot blast temperature conditioning chamber, thermocouple and superhigh temperature valve, be installed in the outside of oxidation unit body, blower fan links to each other with the air air intake through flow control valve, the air air intake is enclosed within on the combustion head of burner, and be communicated with hot blast temperature conditioning chamber, the hot blast distribution system comprises hot blast distribution header and a plurality of hot blast dispensing branch, wherein the hot blast distribution header places the centre of oxidation unit body interior, be inserted in the hole of ceramic heat storage body, its arrival end is connected with the hot blast temperature conditioning chamber by the superhigh temperature valve, the both sides of a plurality of hot blast dispensing branch separation hot blast distribution header, be inserted in the hole of ceramic heat storage body, link to each other with the hot blast distribution header.
The heating start-up system of described mine ventilation air methane oxidized apparatus, the hot blast distribution header is installed in the hole through total pipe holder, leaves the gap between its outer wall and the ceramic heat storage body; Be uniform-distribution with many apertures on the tube wall of hot blast dispensing branch, and be installed in the hole, leave the gap between its outer wall and the ceramic heat storage body through a pipe holder.
The heating start-up system of described mine ventilation air methane oxidized apparatus is inserted with thermocouple on the hot blast temperature conditioning chamber.
The heating start-up system of described mine ventilation air methane oxidized apparatus, oxidation unit body are the ceramic heat storage body that is provided with insulation layer.
Its operating principle is: during startup, at first open the air distribution device of the hot counter flow oxidation device of mine air-lack mash gas, the blast in oxidation unit body interior centre is maintained ± 100kPa in.Open flow control valve and superhigh temperature valve, start blower fan, air enters hot blast temperature conditioning chamber through the air air intake.Open burner, the high-temperature gas that burner produces mixes in hot blast temperature conditioning chamber with the air that blower fan is carried.Mixed hot gas enters the hot blast distribution header through the superhigh temperature valve, and then enter each hot blast dispensing branch, enter ceramic heat storage body by the hole on the hot blast dispensing branch tube wall, ceramic heat storage body is heated, so that the temperature of mist is consistent with the target temperature of setting.When the temperature of the thermocouple collection that is positioned at oxidation unit ceramic heat storage body centre reaches predetermined value (as 1000 ℃), close burner, superhigh temperature valve, blower fan and flow control valve successively, so far, start-up course is finished, and oxidation unit is operation automatically under the control of control system.
In the oxidation unit running, cross when low when the temperature in ceramic heat storage body centre, open flow control valve and superhigh temperature valve, start blower fan and burner, to hot blast distribution system heat air delivery, the thermal storage ceramic in centre is assisted heating, to keep oxidation reaction.When the temperature in ceramic heat storage body centre reaches the operate as normal value, stop heating, close burner, superhigh temperature valve, blower fan and flow control valve successively.
In the oxidation unit running, when the temperature in ceramic heat storage body centre is too high, open flow control valve and superhigh temperature valve, start blower fan, carry cold air to the hot blast distribution system, the thermal storage ceramic in centre is cooled off, to guarantee normal operating temperature.
Major advantage of the present invention and beneficial effect are:
(1) adopt the combustor external heating, to heating system require lowly, reduced cost, easy to maintenance.Hot blast distribution header and hot blast dispensing branch can adopt resistant to elevated temperatures pottery to make, and can place in the high-temperature region reliability height for a long time.The high-temperature gas that burner produces air adjustment in the hot blast temperature conditioning chamber, the temperature constant after the adjusting, control easily, the high temperature of having avoided producing because of heating system has prolonged the life-span of oxidation bed to the destruction that oxidation bed causes.
(2) in process of coal mining, the gas density in the mine air-lack can fluctuate.In the oxidation unit running, the temperature in oxidation bed centre also can fluctuate along with the ventilation air gas fluctuation of concentration to a certain extent.If oxidation bed centre temperature is low excessively, heating system can be assisted heating to oxidation bed automatically under the control of control system; If oxidation bed centre temperature is too high, control system starts the blower fan of heating system automatically, and transporting cold wind in oxidation bed suppresses high temperature.The temperature at oxidation bed center is kept within the specific limits, improve the stability of oxidation unit operation.
(3) native system can the mine on-site actual situations be selected the burner of various fuel for use, and fuel comprises dense gas, natural gas, liquefied petroleum gas, gasoline and diesel oil etc., and fuel is selected for use flexibly.
(4) this heating start-up system consumed power is less, has reduced power load.
(5) this heating start-up system not only has advantages such as reliability height, low, the easy maintenance of cost, fuel-flexible, power load be little, has improved operation stability of equipment.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is a local A-A cut-away view embodiment illustrated in fig. 1.
Fig. 3 is the B-B cut-away view in embodiment illustrated in fig. 1.
Fig. 4 is a middle hot blast dispensing branch cross section partial cutaway diagrammatic sketch embodiment illustrated in fig. 1.
Among the figure: 1, blower fan 2, flow control valve 3, air distribution outlet 4, burner 5, hot blast temperature conditioning chamber 6, thermocouple 7, superhigh temperature valve 8, hot blast distribution header 9, insulation layer 10, hot blast dispensing branch 11, prop up pipe holder 12 ceramic heat storage bodies 13, total pipe holder 14, the enterprising directed dispenser 15 of giving vent to anger, four-way change-over valve 16, valve 17, weary wind inlet pipe 18, blast fan 19, air-introduced machine 20, stack 21, valve 22, under pass in and out conductance to distributor 23, supporting network 24, thermocouple 25, hole 26, hole 27, aperture
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing:
In the embodiment shown in Fig. 1-4: the enterprising directed dispenser 14 of giving vent to anger, four-way change-over valve 15, valve 16, weary wind inlet pipe 17, blast fan 18, air-introduced machine 19, stack 20,21 times turnover of valve conductance have constituted the air distribution device of the hot counter flow oxidation device of mine air-lack mash gas to distributor 22, and the oxidation unit body is the ceramic heat storage body 12 that is provided with insulation layer 9.Blower fan 1 links to each other with air air intake 3 through flow control valve 2, and air air intake 3 is enclosed within on the combustion head of burner 4, and is communicated with hot blast temperature conditioning chamber 5; Hot blast distribution header 8 places the centre of oxidation unit body interior, also is installed in the hole 25 of ceramic heat storage body 12 through total pipe holder 13, leave the gap between its outer wall and the ceramic heat storage body 12, the arrival end of hot blast distribution header 8 is connected with hot blast temperature conditioning chamber 5 by superhigh temperature valve 7; Be evenly equipped with on a plurality of tube walls the hot blast dispensing branch 10 separation hot blast distribution headers 8 of aperture 27 both sides, and be installed in the hole 26 of ceramic heat storage body 12 through a pipe holder 11, hot blast dispensing branch 10 links to each other with hot blast distribution header 8, leaves the gap between its outer wall and the ceramic heat storage body 12.Be inserted with thermocouple 6 on the hot blast temperature conditioning chamber 5.
Claims (5)
1. the heating start-up system of a mine ventilation air methane oxidized apparatus, comprise that hot blast produces and regulating system, hot blast distribution system two large divisions, it is characterized in that: hot blast produces with regulating system and comprises blower fan (1), flow control valve (2), air air intake (3), burner (4), hot blast temperature conditioning chamber (5), thermocouple (6) and superhigh temperature valve (7), be installed in the outside of oxidation unit body, blower fan (1) links to each other with air air intake (3) through flow control valve (2), air air intake (3) is enclosed within on the combustion head of burner (4), and be communicated with hot blast temperature conditioning chamber (5), the hot blast distribution system comprises hot blast distribution header (8) and a plurality of hot blast dispensing branch (10), wherein hot blast distribution header (8) places the centre of oxidation unit body interior, be inserted in the hole (25) of ceramic heat storage body (12), its arrival end is connected with hot blast temperature conditioning chamber (5) by superhigh temperature valve (7), the both sides of a plurality of hot blast dispensing branch (10) separation hot blast distribution headers (8), be inserted in the hole (26) of ceramic heat storage body (12), link to each other with hot blast distribution header (8).
2. the heating start-up system of mine ventilation air methane oxidized apparatus according to claim 1 is characterized in that: hot blast distribution header (8) is installed in the hole (25) through total pipe holder (13), and its outer wall and ceramic heat storage body leave the gap between (12).
3. the heating start-up system of mine ventilation air methane oxidized apparatus according to claim 1, it is characterized in that: be uniform-distribution with many apertures (27) on the tube wall of hot blast dispensing branch (10), and be installed in the hole (26) through pipe holder (11), its outer wall and ceramic heat storage body leave the gap between (12).
4. the heating start-up system of mine ventilation air methane oxidized apparatus according to claim 1 is characterized in that: be inserted with thermocouple (6) on the hot blast temperature conditioning chamber (5).
5, the heating start-up system of mine ventilation air methane oxidized apparatus according to claim 1 is characterized in that: the oxidation unit body is for being provided with the ceramic heat storage body (12) of insulation layer (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101592966A CN101413398B (en) | 2008-11-28 | 2008-11-28 | Heating start-up system of mine ventilation air methane oxidized apparatus |
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| CN2008101592966A CN101413398B (en) | 2008-11-28 | 2008-11-28 | Heating start-up system of mine ventilation air methane oxidized apparatus |
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| CN101413398A true CN101413398A (en) | 2009-04-22 |
| CN101413398B CN101413398B (en) | 2010-12-15 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010085835A1 (en) * | 2009-01-29 | 2010-08-05 | Commonwealth Scientific And Industrial Research Organisation | System and method for mitigating at least one component from a fluid stream |
| CN101906986A (en) * | 2010-07-09 | 2010-12-08 | 胜利油田胜利动力机械集团有限公司 | Method for distributing intake airflow and exhaust airflow of coal mine methane device |
| CN102213106A (en) * | 2011-05-23 | 2011-10-12 | 湖南科技大学 | Continuous countercurrent catalytic oxidation device of ventilation air gas of coal mine |
| CN102733872A (en) * | 2012-04-01 | 2012-10-17 | 浙江亿扬能源科技有限公司 | Ventilation air methane oxidation power generation system |
| CN109114345A (en) * | 2018-07-25 | 2019-01-01 | 山东理工大学 | Three layers of hot wind distribution pipe |
| CN111589286A (en) * | 2020-05-30 | 2020-08-28 | 苏州惠贝电子科技有限公司 | Heat accumulation oxidation treatment device for coal mine ventilation gas |
| CN114558582A (en) * | 2022-03-23 | 2022-05-31 | 中国矿业大学 | Double perovskite supported catalyst for catalyzing methane oxidation of ventilation air methane, and preparation method and application thereof |
-
2008
- 2008-11-28 CN CN2008101592966A patent/CN101413398B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010085835A1 (en) * | 2009-01-29 | 2010-08-05 | Commonwealth Scientific And Industrial Research Organisation | System and method for mitigating at least one component from a fluid stream |
| CN101906986A (en) * | 2010-07-09 | 2010-12-08 | 胜利油田胜利动力机械集团有限公司 | Method for distributing intake airflow and exhaust airflow of coal mine methane device |
| CN102213106A (en) * | 2011-05-23 | 2011-10-12 | 湖南科技大学 | Continuous countercurrent catalytic oxidation device of ventilation air gas of coal mine |
| CN102733872A (en) * | 2012-04-01 | 2012-10-17 | 浙江亿扬能源科技有限公司 | Ventilation air methane oxidation power generation system |
| CN109114345A (en) * | 2018-07-25 | 2019-01-01 | 山东理工大学 | Three layers of hot wind distribution pipe |
| CN111589286A (en) * | 2020-05-30 | 2020-08-28 | 苏州惠贝电子科技有限公司 | Heat accumulation oxidation treatment device for coal mine ventilation gas |
| CN114558582A (en) * | 2022-03-23 | 2022-05-31 | 中国矿业大学 | Double perovskite supported catalyst for catalyzing methane oxidation of ventilation air methane, and preparation method and application thereof |
| CN114558582B (en) * | 2022-03-23 | 2024-01-12 | 中国矿业大学 | Double perovskite supported catalyst for catalyzing methane oxidation of ventilation air methane and preparation method and application thereof |
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| CN101413398B (en) | 2010-12-15 |
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