CN101580740A - Preheated multistage air distribution gasification process for fixed bed straws - Google Patents
Preheated multistage air distribution gasification process for fixed bed straws Download PDFInfo
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- CN101580740A CN101580740A CNA2009100253678A CN200910025367A CN101580740A CN 101580740 A CN101580740 A CN 101580740A CN A2009100253678 A CNA2009100253678 A CN A2009100253678A CN 200910025367 A CN200910025367 A CN 200910025367A CN 101580740 A CN101580740 A CN 101580740A
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- gasification
- hot blast
- air distribution
- vapourizing furnace
- preheated
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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
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Abstract
The invention relates to a preheated multistage air distribution gasification process for fixed bed straws. A thermal gasification medium is firstly heated in a pre-heater, and the heated gasification medium in a hot air distribution container is delivered into a gasification furnace by section to establish a good reaction condition of a sodium hydroxide gasification furnace so as to improve the gasification efficiency and combustion heat value. Because the gasification medium is preheated and then subjected to multistage air distribution gasification, the efficiency of gasification reaction of the straws is improved, the physical sensible heat carried by fuel gas is fully utilized, the thermal value of the fuel gas is improved at the same time, the clinker content is reduced, the discharge amount of greenhouse gases in China can be reduced, and the process is clean and environment-friendly.
Description
Technical field
The present invention relates to a kind of fixed bed straw gasification process, is a kind of preheated multistage air distribution gasification process for fixed bed straws.
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 present invention proposes a kind of preheated multistage air distribution gasification process for fixed bed straws, this process makes full use the energy of biomass itself--promptly reduce ash content carbons 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 present invention solves the concrete scheme that its technical problem adopts: the vapourizing furnace of a tubular that is surrounded by metal sheet is arranged in this technology, 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 present invention 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 invention will be further described below in conjunction with accompanying drawing;
Accompanying drawing is a structural principle synoptic diagram of the present invention;
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, the vapourizing furnace 19 of a tubular that is surrounded by metal sheet is arranged in this technology, 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 (4)
1. preheated multistage air distribution gasification process for fixed bed straws, the vapourizing furnace (19) that a tubular that is surrounded by metal sheet is arranged in this technology, vapourizing furnace (19) periphery are separately installed with from top to bottom that the last air intake that leads in the vapourizing furnace (19) is 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, 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), thereby makes vapourizing furnace be sent constantly into hot blast; It is characterized in that: the hot gas medium at first is heated in preheater (3), gasifying medium after the heating is sent into vapourizing furnace (19) at hot blast allocation set case (7) by segmentation, to set up good vapourizing furnace reaction conditions, improve gasification efficiency and fuel gases calorific value with this.
2. a kind of preheated multistage air distribution gasification process for fixed bed straws according to claim 1 is characterized in that: utilize gasifying medium to reclaim combustion gas, sensible heat, the Heating temperature of gasifying medium is 110 ℃～500 ℃.
3. a kind of preheated multistage air distribution gasification process for fixed bed straws according to claim 1, it is characterized in that: in biomass pyrolytic incendiary gasification reduction reaction section, the heat that hot blast and burning are brought is all supplied with reduction and gaseous conversion zone, the lagging material thermal insulation is adopted in whole body of heater (19)-outside, and lagging material also can lay to reduce thermosteresis in heating duct (8,9,10), the female pipe of hot blast (6), hot blast allocation set case (7), airway (14), the equal portion of bellows (15,17) and preheater (3) outer end in addition.
4. a kind of preheated multistage air distribution gasification process for fixed bed straws according to claim 1, it is characterized in that: adopt 2 grades～8 grades air distribution mode in biomass pyrolytic, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100253678A CN101580740B (en) | 2009-03-12 | 2009-03-12 | Preheated multistage air distribution gasification process for fixed bed straws |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100253678A CN101580740B (en) | 2009-03-12 | 2009-03-12 | Preheated multistage air distribution gasification process for fixed bed straws |
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| Publication Number | Publication Date |
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| CN101580740A true CN101580740A (en) | 2009-11-18 |
| CN101580740B CN101580740B (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100253678A Expired - Fee Related CN101580740B (en) | 2009-03-12 | 2009-03-12 | Preheated multistage air distribution gasification process for fixed bed straws |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220173A (en) * | 2011-05-16 | 2011-10-19 | 徐州燃控科技股份有限公司 | Biomass gasifier with fixing bed and air distribution process thereof |
| CN102443445A (en) * | 2011-02-13 | 2012-05-09 | 富来森集团有限公司 | Process and device for continuously gasifying biomass and simultaneously removing tar in moving bed |
| CN102492489A (en) * | 2011-12-08 | 2012-06-13 | 上海交通大学 | Biomass staged oxygen-supplying gasification furnace and gasification method |
| CN103571542A (en) * | 2012-08-10 | 2014-02-12 | 王振孝 | Hydrocarbon energy conversion method and hydrogen-rich gas generating furnace |
| CN105018146A (en) * | 2015-07-06 | 2015-11-04 | 上海应用技术学院 | Latch type versatile biomass gasification furnace |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1181159C (en) * | 2001-03-16 | 2004-12-22 | 中国林业科学研究院林产化学工业研究所 | Biomass internally circulating conic fluidized bed gasifying process and equipment |
| CN2760036Y (en) * | 2005-01-06 | 2006-02-22 | 靳开亮 | Stalk gasifying furnace |
-
2009
- 2009-03-12 CN CN2009100253678A patent/CN101580740B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443445A (en) * | 2011-02-13 | 2012-05-09 | 富来森集团有限公司 | Process and device for continuously gasifying biomass and simultaneously removing tar in moving bed |
| CN102443445B (en) * | 2011-02-13 | 2014-02-12 | 大兴安岭兴森能源高科技有限责任公司 | Process and device for continuously gasifying biomass and simultaneously removing tar in moving bed |
| CN102220173A (en) * | 2011-05-16 | 2011-10-19 | 徐州燃控科技股份有限公司 | Biomass gasifier with fixing bed and air distribution process thereof |
| CN102492489A (en) * | 2011-12-08 | 2012-06-13 | 上海交通大学 | Biomass staged oxygen-supplying gasification furnace and gasification method |
| CN103571542A (en) * | 2012-08-10 | 2014-02-12 | 王振孝 | Hydrocarbon energy conversion method and hydrogen-rich gas generating furnace |
| CN105018146A (en) * | 2015-07-06 | 2015-11-04 | 上海应用技术学院 | Latch type versatile biomass gasification furnace |
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| CN101580740B (en) | 2013-03-06 |
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Address after: 221004 No. 12 Yang Shan Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee after: XUZHOU KERONG ENVIRONMENTAL RESOURCES CO., LTD. Address before: 221004 No. 12 Yang Shan Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee before: Xuzhou Combustion Control Research Institute Co., Ltd. |
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Granted publication date: 20130306 Termination date: 20210312 |