CN203907631U - Reverse flow catalytic combustion system for treating low-concentration methane - Google Patents
Reverse flow catalytic combustion system for treating low-concentration methane Download PDFInfo
- Publication number
- CN203907631U CN203907631U CN201420064014.5U CN201420064014U CN203907631U CN 203907631 U CN203907631 U CN 203907631U CN 201420064014 U CN201420064014 U CN 201420064014U CN 203907631 U CN203907631 U CN 203907631U
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- China
- Prior art keywords
- catalytic combustion
- combustion system
- catalyst
- low
- concentration methane
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000007084 catalytic combustion reaction Methods 0.000 title claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 6
- 229910052878 cordierite Inorganic materials 0.000 claims abstract description 5
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 3
- 238000005338 heat storage Methods 0.000 claims description 30
- 238000012545 processing Methods 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000000376 reactant Substances 0.000 claims description 3
- 239000011232 storage material Substances 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 229910000510 noble metal Inorganic materials 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000009245 menopause Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Incineration Of Waste (AREA)
Abstract
The utility model relates to a reverse flow catalytic combustion system for treating low-concentration methane, which belongs to the field of environmental protection. The reverse flow catalytic combustion system is located at the gas outlet of a system, and utilizes the reverse flow catalytic combustion method to treat gas. The reverse flow catalytic combustion system comprises an adiabatic catalytic reactor, automatic control valves, a time relay and a heating system. Honeycomb cordierite or mullite heat accumulators are filled in both ends of the catalytic reactor, and catalyst is filled in the center. The reverse flow catalytic combustion system can treat gas with methane concentration as low as 0.2 percent, and the methane removal efficiency reaches 90 percent.
Description
Technical field
The present invention relates to a kind of device of processing extremely low concentration methane, belong to field of Environment Protection.
Background technology
Methane is called gas in coal industry field, and in the mine that is rich in methane, the volume fraction of methane is 0.1%～1.0%, and in process of coal mining, the volume fraction of methane reaches 5%～15% and will cause gas explosion.If the methane in colliery can be extracted to utilization, not only can reduce the generation of accident of mine disaster, and how available clean energy resource can be provided.Therefore, how to be the available energy by this low-grade resource conversion, there is important research and using value.
Because methane concentration is extremely low, usual manner cannot effectively be processed it, and methane concentration just can not be lighted lower than 4.5%, unless environment temperature reaches 1000 DEG C.Therefore need to design the integrated reactor of a kind of height and carry out efficient processing and utilizing low-concentration methane.Flow-reversal catalytic combustion technology is partially integrated in preheating, reaction and three of heat recovery in an equipment, compared with burning with traditional fixed-bed catalytic, realize the efficiently integrated of catalytic combustion and recuperation of heat, and because the volumetric heat capacity amount of gas-solid two-phase differs greatly, make the antijamming capability of this process stronger, make reactor have larger elasticity than stationary state operation.As a kind of novel fixed bed reactors non-steady-state operation technology, the concept of flow-reversal catalytic combustion was just proposed by Cottrel as far back as 1938.Abroad in Recent Years has some industrialized units, utilizes this technology to process VOC.1984, first Novosibirsk company utilized flow-reversal technology to the C producing in plasticizer production process
4～C
8alcohol purifies, and charge flow rate is 800m
3under/h, purifying rate reaches 99.6%.Kemerovo company in 1989 is to VOC gas treatment such as the methyl alcohol producing in production of resins, phenol, formaldehyde, and charge flow rate is 650m
3when/h, purifying rate is up to 99%.By utilizing this technology, this reaction unit can combine chemical reaction and accumulation of heat heat exchange, greatly improves the utilization rate of heat energy, and, even if also can realize self-heating catalytic combustion in the time processing extremely low concentration organic combustible gas.Meanwhile, diminishing of bed size also makes heat loss reduce except making investment cost minimizing.
Summary of the invention
The object of the present invention is to provide a kind of extremely low concentration methane flow-reversal catalytic combustion system, in the less situation of guarantee thermal loss, maintain the self-holding operation of reactor, and efficiently utilize exothermic heat of reaction that Outlet Gas Temperature is reduced to below 60 DEG C, and equipment is simple and reliable.
For achieving the above object, the present invention adopts following technological means:
A kind of low-concentration methane flow-reversal catalytic combustion system of processing, comprise reactor body, autocontrol valve and control system, it is characterized in that: reactor body is made up of the catalyst at double casing cylindrical shell, the high heat capacity heat storage that is seated in inner barrel two ends, middle part and the heating system between catalyst and heat storage; The two ends of double casing cylindrical shell are provided with air inlet and gas outlet, in the Catalyst packing section at middle part, thermocouple are installed, and are provided with the control system that control heating system power supply opens and closes; Autocontrol valve is connected with escape pipe with air inlet pipe respectively, and the startup of valve and the flow-reversal of reactant are by time relay control and adjusting.
Reactor body double casing is full closeding state, is that vacuum state is to ensure reactor heat-insulating property between its double Shell.
Heat storage is integral honeycomb shape ceramic heat storage body.
Described catalyst is integral catalyzer.
Catalyst is noble metal catalyst or metal oxide catalyst.
Autocontrol valve is four motor-driven valves, is located at respectively air inlet and gas outlet.
High heat capacity heat storage material is cordierite or mullite ceramic material.
The following beneficial effect of tool of the present invention:
1, appearance and size, the aperture of honeycomb ceramic heat accumulator and catalyst carrier are identical, make system pressure loss very little.
2, adopt heating system between heat storage and catalyst, system heating starts fast, and heat can faster be delivered on catalyst.
3, reactor body double casing is full closeding state, and between double Shell, is vacuum state, has reduced the heat loss of reaction system, is conducive to realization response device from maintaining.
4, make Outlet Gas Temperature be reduced to 60 DEG C by the optimization of whole reactor, meet actual requirement of engineering.
Brief description of the drawings
The schematic flow sheet that accompanying drawing 1 is device;
Accompanying drawing 2 is reactor body double casing cutaway view;
Accompanying drawing 3 flows to artwork from right to left for air-flow;
Accompanying drawing 4 flows to artwork from left to right for air-flow;
Accompanying drawing 5 is thermocouple position in system;
Accompanying drawing 6 is methane conversion;
Accompanying drawing 7 outlet temperatures change;
Accompanying drawing 8 catalytic section variations in temperature;
Accompanying drawing 9 heat accumulating sections Temperature Distribution.
In figure: 1 is that methane gas, 2 is that air compressor machine, 3 is that pressure maintaining valve, 4 is that mass flowmenter, 5,6,7,8 is that autocontrol valve, 9 is that the time relay, 10 is that high heat capacity heat storage, 11 is that double casing cylindrical shell, 12 is heating system.
Detailed description of the invention
Referring to accompanying drawing 1, low-concentration methane flow-reversal catalytic combustion system main body is made up of the catalyst 13 at double casing cylindrical shell 11, the high heat capacity heat storage 10 that is seated in inner barrel two ends, middle part and the heating system 12 between catalyst and heat storage; At catalyst and heat storage part, thermocouple is all housed, the temperature feedback control heating system recording according to thermocouple; Autocontrol valve I5, autocontrol valve II6, autocontrol valve III7, autocontrol valve IV8 is connected with escape pipe with air inlet pipe respectively, and the startup of valve and the flow-reversal of reactant are controlled and are regulated by the time relay 9.
Low-concentration methane gas alternately enters reactor according to the commutation cycle of setting.When autocontrol valve I5, autocontrol valve IV8 open, autocontrol valve II6, autocontrol valve III7 closes, methane gas passes through heat storage from top to bottom, heated gradually, after catalytic bed burning heat release, heat is passed to discharge system after the heat storage of lower semisection; After half period, autocontrol valve II6, autocontrol valve III7 opens, autocontrol valve I5, autocontrol valve IV8 close, and ventilating gas is oppositely from bottom to top by heat storage, heated gradually, after catalytic bed burning heat release, heat is passed to discharge system after the heat storage of upper semisection.The heat major part that exothermic reaction produces is like this accumulated in reaction bed, ensures that reactor is from maintaining operation.On catalyst and heat storage, all arrange that thermocouple carrys out detected temperatures.
Embodiment 1
Apply that of the present invention to have set up a set of disposal ability be 4m
3/ h low-concentration methane flow-reversal catalytic combustion system.As shown in Figure 1, gas enters reactor from the autocontrol valve I5 opening from upper end, first the faviform ceramic heat retainer of menopause heat catalysis device bottom enters catalytic bed, now catalytic bed is reached 400 DEG C via electrically heated resistance wire preheating, the catalyzed burning of methane in gas, reacts and discharges a large amount of heat in catalytic bed.Gas temperature raises, and the heat storage of heating below is stored heat gas temperature is reduced by heat storage, after gas flows out heat storage, enters blast pipe, discharge system through autocontrol valve IV8.
When reaching after the half period of setting, flow-reversal, gas enters reactor by the autocontrol valve III7 of reactor lower end, while having stored the lower end heat storage of heat through first cycle, start preheating, in the time approaching top catalyst, reach 400 DEG C of the active temperatures of catalyst, the catalyzed burning of methane in gas, reacts and discharges a large amount of heat in catalytic bed.Gas temperature raises, the heat storage of heating top, and heat storage stores heat gas temperature is reduced, and after gas flows out heat storage, enters blast pipe, discharge system through autocontrol valve II6.
Arrive time commutation cycle of setting, flowed to and start again to change, through shuttle circulation, after the heat of honeycomb ceramic heat accumulator is removed,, through preheating gas release heat again, make and so forth system to control oneself and carry out after accumulation of heat again with accumulation of heat through commutation.
Cellular heat storage material in this device is cordierite, and hole density is 400/in
2; Catalyst is taking cordierite heat storage as carrier, with γ-Al of the CeO that adulterated
2o
3for Second support, Pd is main active.Gas flow is 4m
3/ h, methane concentration 0.2%, commutation cycle 10min, catalyst warm-up temperature to 400 DEG C, methane conversion is except the momentary efficiency causing because of commutation reduces, under stability state, can reach 90% (seeing Fig. 5), catalyst, heat storage and outlet temperature present cyclically-varying rule (seeing Fig. 6) with the conversion flowing to.
Embodiment 2
Reaction unit is as embodiment 1, and by catalyst warm-up to 450 DEG C, gas flow is 4m
3/ h, methane concentration 0.2%, commutation cycle 10min, methane conversion can reach more than 90%, and outlet temperature reaches 60 DEG C.
Claims (7)
1. process low-concentration methane flow-reversal catalytic combustion system for one kind, comprise reactor body, autocontrol valve and control system, it is characterized in that: reactor body is made up of the catalyst at double casing cylindrical shell, the high heat capacity heat storage that is seated in inner barrel two ends, middle part and the heating system between catalyst and heat storage; The two ends of double casing cylindrical shell are provided with air inlet and gas outlet, in the Catalyst packing section at middle part, thermocouple are installed, and are provided with the control system that control heating system power supply opens and closes; Autocontrol valve is connected with escape pipe with air inlet pipe respectively, and the startup of valve and the flow-reversal of reactant are by time relay control and adjusting.
2. a kind of low-concentration methane flow-reversal catalytic combustion system of processing according to claim 1, is characterized in that: reactor body double casing is full closeding state, is that vacuum state is to ensure reactor heat-insulating property between its double Shell.
3. a kind of low-concentration methane flow-reversal catalytic combustion system of processing according to claim 1, is characterized in that: heat storage is integral honeycomb shape ceramic heat storage body.
4. a kind of low-concentration methane flow-reversal catalytic combustion system of processing according to claim 1, is characterized in that: described catalyst is integral catalyzer.
5. process low-concentration methane flow-reversal catalytic combustion system according to the one described in claim 1 or 4, it is characterized in that: catalyst is noble metal catalyst or metal oxide catalyst.
6. a kind of low-concentration methane flow-reversal catalytic combustion system of processing according to claim 1, is characterized in that: autocontrol valve is four motor-driven valves, is located at respectively air inlet and gas outlet.
7. a kind of low-concentration methane flow-reversal catalytic combustion system of processing according to claim 1, is characterized in that: high heat capacity heat storage material is cordierite or mullite ceramic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420064014.5U CN203907631U (en) | 2014-02-13 | 2014-02-13 | Reverse flow catalytic combustion system for treating low-concentration methane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420064014.5U CN203907631U (en) | 2014-02-13 | 2014-02-13 | Reverse flow catalytic combustion system for treating low-concentration methane |
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| Publication Number | Publication Date |
|---|---|
| CN203907631U true CN203907631U (en) | 2014-10-29 |
Family
ID=51781906
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420064014.5U Expired - Lifetime CN203907631U (en) | 2014-02-13 | 2014-02-13 | Reverse flow catalytic combustion system for treating low-concentration methane |
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| Country | Link |
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| CN (1) | CN203907631U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413387A (en) * | 2015-11-12 | 2016-03-23 | 宁波大学 | VOCs tail gas adsorption-catalytic combustion treatment system |
| CN106352358A (en) * | 2016-08-30 | 2017-01-25 | 苏州云白环境设备股份有限公司 | Using method of reversible catalytic burner |
| CN106540538A (en) * | 2015-09-17 | 2017-03-29 | 北京化工大学 | A kind of apparatus and method for of wind resource assessment catalysis oxidation |
| CN110260343A (en) * | 2019-06-19 | 2019-09-20 | 西南化工研究设计院有限公司 | A kind of system and method for the heat-storage catalytic of organic exhaust gas containing VOCs burning |
-
2014
- 2014-02-13 CN CN201420064014.5U patent/CN203907631U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106540538A (en) * | 2015-09-17 | 2017-03-29 | 北京化工大学 | A kind of apparatus and method for of wind resource assessment catalysis oxidation |
| CN105413387A (en) * | 2015-11-12 | 2016-03-23 | 宁波大学 | VOCs tail gas adsorption-catalytic combustion treatment system |
| CN106352358A (en) * | 2016-08-30 | 2017-01-25 | 苏州云白环境设备股份有限公司 | Using method of reversible catalytic burner |
| CN110260343A (en) * | 2019-06-19 | 2019-09-20 | 西南化工研究设计院有限公司 | A kind of system and method for the heat-storage catalytic of organic exhaust gas containing VOCs burning |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |
|
| CX01 | Expiry of patent term |