CN1375540A - Biomass internally circulating conic fluidized bed gasifying process and equipment - Google Patents
Biomass internally circulating conic fluidized bed gasifying process and equipment Download PDFInfo
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- CN1375540A CN1375540A CN 01108139 CN01108139A CN1375540A CN 1375540 A CN1375540 A CN 1375540A CN 01108139 CN01108139 CN 01108139 CN 01108139 A CN01108139 A CN 01108139A CN 1375540 A CN1375540 A CN 1375540A
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Abstract
The present invention relates to a biomass internal recycling conical fluidized bed gasification process and equipment for implementing said process. Said invented process and equipment are specially applicable to gasification process using wood dust, rice husk and soft straw (rice straw and wheat straw) as raw material. The heat value of gas produced by adopting said process is about 1800 kcl/Ncu.m.
Description
The present invention relates to biomass (agricultural residuums such as straw, wheat straw, rice husk and wood chip) internally circulating conic fluidized bed gasifying process and realize the equipment of this technology, Processes and apparatus of the present invention is specially adapted to wood chip, rice husk, soft straw (straw, wheat straw etc.) and is the gasification of raw material.
Present domestic straw gasifying generally adopts the downdraft fixed-bed gasification furnace, and this type of furnace is mainly used in the gasification of hard straw, as handling soft straw with it, and the one, fluctuation of service, the 2nd, the caloric power of gas that is produced is on the low side, influences the resident and normally uses.For the gasification of wood chip, wood powder class raw material, domestic have the report that adopts outer circulation cylindrical fluidized bed vapourizing furnace, but this furnace type structure complexity.Gasifying medium generally adopts air, also has to adopt the report of pure oxygen as gasifying medium, and be that initial cost is big but adopt pure oxygen gasification one, the 2nd, the running cost height is difficult to bear economically, and open washing is generally adopted in gas purification, give off large amount of sewage, easily cause environmental pollution.
The object of the present invention is to provide the technology and the equipment for gasification of gasification such as the biomass material that can be used for soft straw.This gasifying process has easy to operate, the caloric power of gas height, pollute little, characteristics such as gas cost is low.The internally circulating conic fluidized bed gasifying stove and accessory of being invented has the gasification intensity height, and turndown ratio reaches characteristics such as good stability greatly.Gasifying medium adopts oxygen-rich air or air, and literary composition is adopted in gas purification---bubble---drum (be Venturi---foam column---bubble tower) closed circulation purification process.
The objective of the invention is to realize by following technological process: (1) biomass material (as agricultural residuums such as wood chip, straw, wheat straws) is through being ground into the particle of particle diameter for≤5mm, and the material after the pulverizing is sent into the internally circulating conic fluidized bed gasifying furnace bottom through hopper by screw feeder; (2) air or be heated to about 150 ℃ by the heat reclaim unit preheater of oxygen-rich air that membrane separation unit is produced through internally circulating conic fluidized bed gasifying stove top, oxygen-rich air after the heating or air enter vapourizing furnace by the vapourizing furnace bottom; (3) inflammable gass such as part redox reaction generation carbon monoxide, hydrogen, methane and heavy hydrocarbon take place in biomass material and oxygen-rich air (or air) in vapourizing furnace.(4) heating gas that contains ash, tar, wood vinegar of discharging by top of gasification furnace, remove dust through cyclonic separator, enter the venturi wet dust collector dedusting of further lowering the temperature again, air-water mixture by the Venturi discharge, remove through cyclonic separator and to anhydrate and part tar, sewage is discharged system by the bottom, coal gas enters foam circulation cleaning system and further lowers the temperature except that tar, the coal gas that is come out by the recycle system enters the washing of bubble cleaning tower, enter gas filter drain cock then, send into gas chamber by roots blower at last.Above-mentioned process using operate continuously, key equipment internally circulating conic fluidized bed gasifying stove wherein, one section direct tube section is arranged at the bottom, is referred to as accelerating sections; The middle part is a conical section, and gasification reaction is mainly finished in this section, is referred to as gasification section; Top is an amplification section, mainly is to make the intact material of unreacted separate with coal gas, is referred to as segregation section; The vapourizing furnace lower gas distribute to adopt special detachable or wimble structure, the easy slagging scorification of board-like gas distribution of having avoided distributing, forms the possibility of dead bed channel, simultaneously can be when high temperature convenient disassembly; The top heat reclaim unit adopts coil arrangement, improves heat of gasification efficient.
Internally circulating conic fluidized bed gasifying stove of the present invention has adopted pyramidal structure, the material that can guarantee different-grain diameter is boiling state in stove, reduce the turbulent and bubble phenomenon of bed, make the bed stable operation, temperature of reaction is even, and stove inner transmission matter heat transfer rate is fast, the gasification intensity height, effectively prevent local superheating and slagging scorification phenomenon in the stove, this type of furnace is specially adapted to soft straw gasifying.Low because of having adopted new gasifying process and equipment to overcome soft straw heat content, the ash content of coal height, shortcoming such as the caloric power of gas of producing is low.The caloric power of gas of this explained hereafter is at 1800kcal/Nm
3About, production cost and gross investment and fixed bed gasification are suitable substantially, and production technique of the present invention is simple, and is easy to operate stable, can effectively solve the problem of outlet of the soft straw in rural area, simultaneously for urban residents provide high-quality, sanitation and hygiene, the energy easy to use.
Below in conjunction with accompanying drawing specific embodiments of the present invention is further described.
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is an internally circulating conic fluidized bed steam stove structural representation of the present invention.
Referring to Fig. 1, concrete technology of the present invention is: biomass materials such as the straw after the pulverizing add feed bin 18, send into vapourizing furnace 3 by feeding screw 17, contact generation part redox reaction with the oxygen-rich air that oxygen-enriching device 1 produces, coal gas that is produced and lime-ash are discharged by top of gasification furnace, remove ash in the coal gas through cyclonic separator 19, enter the further dedusting cooling of Venturi 20 wet scrubbers again, gas-liquid mixture after the shaped Venturi dedusting cooling enters cyclonic separator 21 makes water, gas separates, sewage is discharged by the bottom, coal gas enters further washing cooling of foam column 6, washings recycles after sending into water cooler 8 coolings by recycle pump 7, coal gas after the washing enters bubble cleaning device 9 and gas filter drain cock 10 again, send into gas chamber 15 by roots blower 11 through cyclonic separator 22 and water seal 14 at last, and deliver to each resident through transport pipe.
Vapourizing furnace adopts pyramidal structure, the bottom is provided with accelerating sections and gas distribution awl, the middle part is a tapered cylinder, top is provided with segregation section and heat recuperation coil pipe, the upper, middle and lower each several part is provided with a temperature-measuring port and a pressure tap, under normal running (operation) conditions, vapourizing furnace inlet amount 140kg/h (water ratio～14%), gas yield 200Nm
3/ h, about 260 ℃ of bottom temps, about 700 ℃ of middle part temperature, about 500 ℃ of head temperature, vapourizing furnace is operated under condition of negative pressure, and the upper and lower pressure differential maintain of vapourizing furnace is at 100mmH
2About O.The Venturi water spray is 600l/h.
Referring to Fig. 2, internally circulating conic fluidized bed gasifying hotplate body structure of the present invention is: top gasifying medium preheater 1, and middle part taper gasification reaction section 2, hopper 3, feeding screw 4, the bottom detachable gas distributes and bores 5.
Claims (4)
1, a kind of Processes and apparatus that is applicable to biomass (agricultural residuums such as straw, wheat straw, rice husk and wood chip) gasification, it is characterized in that, (1) biomass (as agricultural residuums such as wood chip, branch wood Asia, corn stalk, straw, rice husk, wheat straws) is ground into≤fine particle of 5mm, by screw feeder adding fluidization vapourizing furnace; (2) gasifying medium is air or the oxygen-rich air produced by membrane separation unit, and gasifying medium is added by the vapourizing furnace bottom after the vapourizing furnace epimere gives heat; (3) the gasification reaction section temperature of fluidization gasification is controlled at 600～900 ℃ of scopes, the pressure reduction 100mmH of vapourizing furnace top and the bottom
2O;
According to the described gasifying biomass Processes and apparatus of claim 1, it is characterized in that 2, the vapourizing furnace gasification section adopts pyramidal structure, the bottom is provided with detachable special gas sparger, and top segregation section is provided with the gasifying medium preheat coil.
3, according to the described gasifying biomass Processes and apparatus of claim 1, it is characterized in that: Venturi---foam column---bubble tower purification process is adopted in gas purification, and the foam column washings uses through refrigeration cycle.
According to the described gasifying biomass Processes and apparatus of claim 1, it is characterized in that 4, operation is operated by the gasification operation system under condition of negative pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011081392A CN1181159C (en) | 2001-03-16 | 2001-03-16 | Biomass internally circulating conic fluidized bed gasifying process and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011081392A CN1181159C (en) | 2001-03-16 | 2001-03-16 | Biomass internally circulating conic fluidized bed gasifying process and equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN1375540A true CN1375540A (en) | 2002-10-23 |
| CN1181159C CN1181159C (en) | 2004-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011081392A Expired - Fee Related CN1181159C (en) | 2001-03-16 | 2001-03-16 | Biomass internally circulating conic fluidized bed gasifying process and equipment |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1966613B (en) * | 2006-11-27 | 2010-05-19 | 郑传祥 | Biomass gasification stove for boiler |
| CN1966627B (en) * | 2006-08-04 | 2010-05-26 | 张家彪 | Method for producing methane-like liquid gas by plant carbonization |
| CN101063039B (en) * | 2006-04-26 | 2011-03-23 | 董久明 | Powder coal grading clean grading utilization technology using thermal dissociation as the first stage |
| CN102002399A (en) * | 2010-11-15 | 2011-04-06 | 国电长源电力股份有限公司 | Fluidized bed gasification reaction method and reactor employing packed fuel |
| CN102105568A (en) * | 2007-12-06 | 2011-06-22 | 江西必高生物质能有限公司 | Integrated biomass fuel gas generating system |
| CN101580740B (en) * | 2009-03-12 | 2013-03-06 | 徐州燃控科技股份有限公司 | Preheated multistage air distribution gasification process for fixed bed straws |
| CN103160298A (en) * | 2011-12-19 | 2013-06-19 | 苏州格瑞展泰再生能源有限公司 | Preparation system of biomass gas and biomass charcoal |
| CN108865271A (en) * | 2018-09-04 | 2018-11-23 | 中国林业科学研究院林产化学工业研究所 | The oxygen gasified method for preparing medium calorific value gas of wood material |
| CN108894769A (en) * | 2018-04-18 | 2018-11-27 | 中国石油天然气股份有限公司 | Integrated differential-pressure-type gas-liquid two-phase flow well head monitoring device |
| CN111054273A (en) * | 2018-10-17 | 2020-04-24 | 中国石油化工股份有限公司 | Moving bed pyrolysis apparatus and method |
-
2001
- 2001-03-16 CN CNB011081392A patent/CN1181159C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063039B (en) * | 2006-04-26 | 2011-03-23 | 董久明 | Powder coal grading clean grading utilization technology using thermal dissociation as the first stage |
| CN1966627B (en) * | 2006-08-04 | 2010-05-26 | 张家彪 | Method for producing methane-like liquid gas by plant carbonization |
| CN1966613B (en) * | 2006-11-27 | 2010-05-19 | 郑传祥 | Biomass gasification stove for boiler |
| CN102105568A (en) * | 2007-12-06 | 2011-06-22 | 江西必高生物质能有限公司 | Integrated biomass fuel gas generating system |
| CN101580740B (en) * | 2009-03-12 | 2013-03-06 | 徐州燃控科技股份有限公司 | Preheated multistage air distribution gasification process for fixed bed straws |
| CN102002399A (en) * | 2010-11-15 | 2011-04-06 | 国电长源电力股份有限公司 | Fluidized bed gasification reaction method and reactor employing packed fuel |
| CN103160298A (en) * | 2011-12-19 | 2013-06-19 | 苏州格瑞展泰再生能源有限公司 | Preparation system of biomass gas and biomass charcoal |
| CN108894769A (en) * | 2018-04-18 | 2018-11-27 | 中国石油天然气股份有限公司 | Integrated differential-pressure-type gas-liquid two-phase flow well head monitoring device |
| CN108865271A (en) * | 2018-09-04 | 2018-11-23 | 中国林业科学研究院林产化学工业研究所 | The oxygen gasified method for preparing medium calorific value gas of wood material |
| CN111054273A (en) * | 2018-10-17 | 2020-04-24 | 中国石油化工股份有限公司 | Moving bed pyrolysis apparatus and method |
| CN111054273B (en) * | 2018-10-17 | 2022-04-05 | 中国石油化工股份有限公司 | Moving bed pyrolysis apparatus and method |
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| Publication number | Publication date |
|---|---|
| CN1181159C (en) | 2004-12-22 |
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