CN201367419Y - Pre-heated multilevel air distribution fixed bed straw gasification device - Google Patents
Pre-heated multilevel air distribution fixed bed straw gasification device Download PDFInfo
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- CN201367419Y CN201367419Y CNU2009200422690U CN200920042269U CN201367419Y CN 201367419 Y CN201367419 Y CN 201367419Y CN U2009200422690 U CNU2009200422690 U CN U2009200422690U CN 200920042269 U CN200920042269 U CN 200920042269U CN 201367419 Y CN201367419 Y CN 201367419Y
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- hot blast
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- preheater
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model provides a pre-heated multilevel air distribution fixed bed straw gasification device. The device is provided with a cylindrical gasification furnace formed surrounded by a metal plate; an upper air intake nozzle, a spray nozzle and a lower hot-blast outlet which are led to the gasification furnace are mounted at the periphery of the gasification furnace from the top down sequentially; a hot air distribution header, a preheater and a blower are mounted on one side of the gasification furnace respectively; the upper air intake nozzle of the gasification furnace is communicated with the hot air distribution header through an air damper and a warm-air pipe sequentially; the spray nozzle of the gasification furnace is communicated with the hot air distribution header through a blast box, the air damper and the warm-air pipe sequentially; the hot air distribution header is communicated with the heat exchange element of the preheater through a hot air main pipe, and then is communicated with the blower through a cold air pipe; and the hot-blast outlet is communicated with the preheater and the hot air distribution header sequentially through an air duct. The utility model makes full use of physical sensible heat of burned gas, and improves the heating value of the burned gas at the same time, thereby reducing ash residue content, even reducing greenhouse gas emissions in China, and being more clean and environment-friendly.
Description
Technical field
The utility model relates to a kind of fixed bed straw gasification process, is a kind of preheated multistage air distribution fixed bed straw gasification device.
Background technology
China is a large agricultural country, stalk output is huge, the gasifying stalk technology is suitable national conditions, clean environment firendly, reproducible energy technology, not only can be vast rural area cleaning, gas energy easily are provided, the various pollution problems that simultaneously also can avoid stalk to cause more can reduce the greenhouse gas emissions of China.Though China has developed multiple stalk gasifier at present, but, almost domestic all middle-size and small-size fixed bed straw gasification stoves all are to be the vapourizing furnace medium with the air, because the combustion calorific value of biomass self is not high, 79% N2 will absorb a large amount of heat and not participate in gasification reaction in gasifying medium, therefore, all there is the common disadvantage that gasification efficiency is low, fuel gases calorific value is low, ash content carbon is high.Though adopt pure oxygen (or being aided with water vapour) also can significantly improve fuel gases calorific value and gasification efficiency as gasifying medium,, the rural area does not also satisfy the requirements and uses at present.To this, also there is not highly effective terms of settlement at present.
Summary of the invention
Problem according to the straw from village vapourizing furnace existence of present China, the utility model proposes a kind of preheated multistage air distribution fixed bed straw gasification device, this device has made full use of the energy of biomass itself---promptly reduce ash content carbon by various means, make full use of the physics sensible heat of combustion gas, as far as possible the chemical energy of biomass is converted into the chemical energy of combustion gas.Utilize the waste heat heating and gasifying medium of reaction back combustion gas, be used for the heat that N2 heats up, reduce air capacity reducing burning, improve efficiency of combustion, reduce ash content carbon, can rapidly the energy storage of biomass be converted into the chemical energy of combustion gas, thereby fuel gases calorific value is greatly improved.
The concrete scheme that its technical problem that solves the utility model adopts is: this device is mainly by blower fan, cold-air duct, preheater, heat exchange element, gas outlet pipe, the female pipe of hot blast, hot blast allocation set case, heating duct, heating duct, heating duct, damper, damper, damper, airway, bellows, nozzle, bellows, nozzle and vapourizing furnace.It is characterized in that: the vapourizing furnace of a tubular that is surrounded by metal sheet is arranged in this device, and the vapourizing furnace periphery is separately installed with from top to bottom that the last air intake that leads in the vapourizing furnace is chewed, nozzle and time hot-blast outlet; In a side of vapourizing furnace, be separately installed with hot blast allocation set case, preheater and blower fan; The last air intake of vapourizing furnace is chewed, and order is by damper, and heating duct is communicated with hot blast allocation set case, and order is by bellows respectively for nozzle, and damper, heating duct are communicated with hot blast allocation set case; Hot blast allocation set case is communicated with the heat exchange element of preheater by the female pipe of hot blast, and is communicated with blower fan by cold-air duct in proper order, and hot-blast outlet is communicated with preheater and hot blast allocation set case in proper order by airway, thereby makes vapourizing furnace be sent constantly into hot blast; The hot gas medium at first is heated in preheater, and the gasifying medium after the heating is sent into vapourizing furnace at hot blast allocation set case by segmentation, to set up good vapourizing furnace reaction conditions, improves gasification efficiency and fuel gases calorific value with this; Utilize gasifying medium to reclaim combustion gas, sensible heat, the Heating temperature of gasifying medium is 110 ℃～500 ℃.
Its beneficial effect is: the utility model carries out carrying out multipole air distribution gasification after the preheating to gasifying medium, improved the efficient of the gasification reaction of stalk, make full use of the entrained physics sensible heat of combustion gas, also improved simultaneously the calorific value of combustion gas, reduced cinder content, more can reduce the greenhouse gas emissions of China, more clean environment firendly.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing;
Accompanying drawing is a structural principle synoptic diagram of the present utility model;
Among the figure, 1. blower fan, 2. cold-air duct, 3. preheater, 4. heat exchange element, 5. gas outlet pipe, the 6. female pipe of hot blast, 7 hot blast allocation set casees, 8. heating duct, 9. heating duct, 10. heating duct, 11. damper, 12. dampers, 13. dampers, 14. airway, 15. bellows, 16. nozzles, 17. bellows, 18. nozzles, 19. vapourizing furnaces.
Embodiment
In the drawings, this device is mainly by blower fan 1, cold-air duct 2, preheater 3, heat exchange element 4, gas outlet pipe 5, the female pipe 6 of hot blast, hot blast allocation set case 7, heating duct 8, heating duct 9, heating duct 10, damper 11, damper 12, damper 13, airway 14, bellows 15, nozzle 16, bellows 17, nozzle 18 and vapourizing furnace 19.It is characterized in that: the vapourizing furnace 19 of a tubular that is surrounded by metal sheet is arranged in this device, and vapourizing furnace 19 peripheries are separately installed with from top to bottom that the last air intakes that lead in the vapourizing furnace 19 are chewed, nozzle 18,16 and time hot-blast outlet; In a side of vapourizing furnace, be separately installed with hot blast allocation set case 7, preheater 3 and blower fan 1; The last air intake of vapourizing furnace 19 is chewed, and order is by damper 11, and heating duct 8 is communicated with hot blast allocation set case 7, and order is by bellows 17,15 respectively for nozzle 18,16, and damper 12,13, heating duct 9,10 are communicated with hot blast allocation set case 7; Hot blast allocation set case 7 is communicated with the heat exchange element 4 of preheater 3 by the female pipe of hot blast 6, and passes through cold-air duct 2 in proper order and be communicated with blower fan 1; Hot-blast outlet is communicated with preheater 3 and hot blast allocation set case 3 orders by airway 14, thereby makes vapourizing furnace be sent constantly into hot blast; The hot gas medium at first is heated in preheater 3, and the gasifying medium after the heating is sent into vapourizing furnace at hot blast allocation set case 7 by segmentation, to set up good vapourizing furnace reaction conditions, improves gasification efficiency and fuel gases calorific value with this; Utilize gasifying medium to reclaim combustion gas, sensible heat, the Heating temperature of gasifying medium is 110 ℃～500 ℃.
In the drawings, the heat exchange element 4 of preheater 3 sent into freezing air by blower fan 1 by cold-air duct 2, air is heated to 110 ℃～500 ℃ temperature by heat exchange element 4 by high-temperature fuel gas, and warm air enters hot blast allocation set case 7 through the female pipe 6 of hot blast, and warm air is assigned to three strands in this case.First strand of wind bed of material upper space in airduct 8 enters vapourizing furnace 19, its flow is by damper 11 controls, and the size of this strand air quantity can influence the drying and the pyrolysis rate of stalk; Second strand of wind enters bellows 17 through airduct 9 and sprays in the stove by nozzle 18, and its flow is by damper 12 controls; The 3rd strand of wind enters bellows 15 through airduct 10 and sprays in the stove by nozzle 16, and its flow is by damper 13 controls.The air quantity of regulating second and third strand wind can be regulated area size, height location and the variation of temperature of combustion centre.
In the drawings, in biomass pyrolytic incendiary gasification reduction reaction section, because gasification reaction is the heat absorption reduction reaction, the heat that hot blast and burning are brought is all supplied with reduction and gaseous conversion zone, whole body of heater 19 outside employing lagging material thermal insulation, heating duct 8,9,10, the female pipe 6 of hot blast, hot blast allocation set case 7, airway 14, bellows 15,17 and preheater 3 all lay lagging material to reduce thermosteresis in addition.
Factors such as the kind of stalk, water content, ash content all can be to the pyrolysis that exerts an influence of its pyrolysis and gasification property, adopt 2 grades～8 grades air distribution mode in biological pyrolysis, combustion reactions section, the one-level air distribution is used to control drying and pyrolysis, and other grade air distribution is used to organize gasification reaction conditions.Make reaction conditions reach optimizing by the big I of regulating all the other strands air quantity, utilize gasifying medium to reclaim the share of combustion gas sensible heat, thereby can improve the calorific value of gasification efficiency and combustion gas with the perfect combustion of minimizing stalk.
Claims (2)
1. preheated multistage air distribution fixed bed straw gasification device, this device is mainly by blower fan (1), cold-air duct (2), preheater (3), heat exchange element (4), gas outlet pipe (5), the female pipe of hot blast (6), hot blast allocation set case (7), heating duct (8), heating duct (9), heating duct (10), damper (11), damper (12), damper (13), airway (14), bellows (15), nozzle (16), bellows (17), nozzle (18), vapourizing furnace (19) is characterized in that: the vapourizing furnace (19) of a tubular that is surrounded by metal sheet is arranged in this device, and steam stove (19) periphery is separately installed with the last air intake that leads in the vapourizing furnace (19) from top to bottom and chews, nozzle (18), (16) reach hot-blast outlet down; In a side of vapourizing furnace, be separately installed with hot blast allocation set case (7), preheater (3) and blower fan (1); The last air intake of vapourizing furnace (19) is chewed, order is by damper (11), heating duct (8) is communicated with hot blast allocation set case (7), order is by bellows (17), (15) respectively for nozzle (18), (16), and damper (12), (13), heating duct (9), (10) are communicated with hot blast allocation set case (7); Hot blast allocation set case (7) is communicated with the heat exchange element (4) of preheater (3) by the female pipe of hot blast (6), and order is communicated with blower fan (1) by cold-air duct (2); Hot-blast outlet is communicated with preheater (3) and hot blast allocation set case (3) order by airway (14).
2. a kind of preheated multistage air distribution fixed bed straw gasification device according to claim 1 is characterized in that: heating duct (8,9,10), the female pipe of hot blast (6), hot blast allocation set case (7), airway (14), bellows (15,17) and preheater (3) all lay lagging material to reduce thermosteresis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200422690U CN201367419Y (en) | 2009-03-20 | 2009-03-20 | Pre-heated multilevel air distribution fixed bed straw gasification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200422690U CN201367419Y (en) | 2009-03-20 | 2009-03-20 | Pre-heated multilevel air distribution fixed bed straw gasification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201367419Y true CN201367419Y (en) | 2009-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200422690U Expired - Fee Related CN201367419Y (en) | 2009-03-20 | 2009-03-20 | Pre-heated multilevel air distribution fixed bed straw gasification device |
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| CN (1) | CN201367419Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305396A (en) * | 2011-06-22 | 2012-01-04 | 田和东 | Device and method with adoption of burning mode of bottom material preparation for biological particle boiler |
| CN104449852A (en) * | 2014-12-04 | 2015-03-25 | 中国环境科学研究院 | Closed updraught type fixed bed gasification furnace waste heat recycling device |
| CN105066118A (en) * | 2015-09-07 | 2015-11-18 | 王泽� | High temperature boiler gas blending combustion device of meagre coal efficient low-nitrogen combustion boiler |
-
2009
- 2009-03-20 CN CNU2009200422690U patent/CN201367419Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305396A (en) * | 2011-06-22 | 2012-01-04 | 田和东 | Device and method with adoption of burning mode of bottom material preparation for biological particle boiler |
| CN104449852A (en) * | 2014-12-04 | 2015-03-25 | 中国环境科学研究院 | Closed updraught type fixed bed gasification furnace waste heat recycling device |
| CN105066118A (en) * | 2015-09-07 | 2015-11-18 | 王泽� | High temperature boiler gas blending combustion device of meagre coal efficient low-nitrogen combustion boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091223 Termination date: 20130320 |