CN101144022B - Three-section type biomass gasifying furnace - Google Patents

Three-section type biomass gasifying furnace Download PDF

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Publication number
CN101144022B
CN101144022B CN 200710047695 CN200710047695A CN101144022B CN 101144022 B CN101144022 B CN 101144022B CN 200710047695 CN200710047695 CN 200710047695 CN 200710047695 A CN200710047695 A CN 200710047695A CN 101144022 B CN101144022 B CN 101144022B
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CN
China
Prior art keywords
biomass
gasification
furnace
fire grate
heater
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CN 200710047695
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Chinese (zh)
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CN101144022A (en
Inventor
陆方
罗永浩
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上海交通大学
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Priority to CN 200710047695 priority Critical patent/CN101144022B/en
Publication of CN101144022A publication Critical patent/CN101144022A/en
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Publication of CN101144022B publication Critical patent/CN101144022B/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/16Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]

Abstract

The invention relates to a three-portion biomass gasifier, in which the thermal cracking section is formed by jacketed type thermal cracking cylinder, the furnace body equipped with insulating layer is divided into a grate upper gasification section and a grate lower gasification section by a grate; the grate comprises a plurality of equilateral roof steels, an air inlet pipe is arranged along thecircumference at the inlet of the furnace body with a laryngeal aperture deposited, a gasification gas outlet is located at the lower furnace wall of the grate and an air intake pipe is uniformly arranged at the bottom of the furnace body. The biomass is thermal cracked into thermal cracking air and biomass coke, and the thermal cracking air is transmitted to laryngeal aperture area to burn and the tar oil in the thermal cracking air is cracked under high temperature; the resulting air reacts with the biomass coke, and the incompletely reacted biomass coke is bowled off by the grate to continue the gasification reaction at the bottom of the furnace. The invention combine thermal cracking characteristic of biomass, combustion characteristic of air with gasification characteristic of biomass coke, to keep the stable combustion of the biomass thermal cracking products passing through, so as to reach high temperature state to crack most of tar oil, therefore to improve the gas productionrate of the gasifier and decrease the level of the gas producing tar oil.

Description

Three-section type biomass gasifying furnace

Technical field

The present invention relates to a kind of three-section type biomass gasifying furnace, be applied to the occasion of gasifying biomass, relate to fields such as environmental protection, new forms of energy.

Background technology

Biomass energy more and more comes into one's own as a kind of renewable energy source, and gasifying biomass is the effective way that biomass are utilized.In the prior biological matter gasification technology, vapourizing furnace adopts downdraft, updraft type or the fluidized-bed type of furnace more, and the downdraft fixed-bed gasification furnace is that biomass are directly pushed on the fire grate, and air enters from bed of material middle part, and gasification gas is drawn under fire grate; The updraft type fixed-bed gasification furnace is that biomass are fallen within on the fire grate, and air is introduced down from fire grate, and gasification gas autopneumatolysis furnace roof portion draws; Fluidized-bed gasification furnace is that air is passed fire grate from bottom to top, blows that material is fluidised form on the fire grate, and gasification gas is drawn from the top.Owing to adopt air directly to feed carbon-coating, consider factors such as slagging scorification, temperature is generally controlled lowlyer, is up to about 800 ℃, and owing to be gas-solid phase reaction, causes localized hyperthermia easily.Owing in gasification layer, can not produce comparatively high temps, cause the tar content of the gasification gas that produces higher, this not only increases the purification expense, easily causes secondary pollution and easy blocking pipe, and increasing combustion engine is washed the cylinder frequency, influences power benefit.

Summary of the invention

The objective of the invention is at the deficiencies in the prior art, a kind of three-section type biomass gasifying furnace is provided, biomass are all gasified be to improve gasifying biomass efficient by combustible gas, reduce the tar content of gasification gas simultaneously.

Be to realize this purpose, the present invention is in conjunction with the pyrolysis characteristics of biomass, the combustioncharacteristics of pyrolysis gas and the gasification of biomass char and combustioncharacteristics, and the three-section type biomass gasifying furnace that design provides is divided on pyrolysis section, the fire grate gasification section under the gasification section and fire grate.Jacketed type pyrolysis tube constitutes pyrolysis section, is provided with fire grate to be set in the body of heater of thermal insulation layer body of heater is divided on the fire grate gasification section under the gasification section and fire grate.Biomass become pyrolysis gas and biomass char after pyrolysis, pyrolysis gas is to the aditus laryngis zonal combustion, with the tar Pintsch process in the pyrolysis gas, the gas of generation and biomass char carry out gasification reaction, and the biomass char of complete reaction is not beaten by fire grate and fallen behind in furnace bottom and proceed gasification reaction.

The concrete structure of three-section type biomass gasifying furnace of the present invention is: be made of body of heater and pyrolysis tube, the pyrolysis tube adopts jacket type structure, one end of pyrolysis tube stretches into the top of body of heater, the stove outside part of pyrolysis tube is welded with one heart by the steel pipe of two different diameters, the logical flue gas of interlayer between the steel pipe also is equipped with and streams sheet, and steel pipe interlayer two ends are respectively equipped with exhanst gas outlet and gas approach.

Be provided with in the body of heater of thermal insulation layer fire grate is set, body of heater is divided on the fire grate gasification section under the gasification section and fire grate.Fire grate is made up of some equal legged angles, and the angle steel inboard is welded with rotary axle, with this biomass char is hit down.Body of heater ingress above fire grate is provided with the round shape aditus laryngis by the refractory concrete cast, and the cross-sectional area of aditus laryngis is 0.3~0.5 times of body of heater cross-sectional area, and aditus laryngis is middle outside circumference uniform distribution air intake duct is communicated with stove.Gasification gas outlet is set, the bottom of furnace body blast pipe of evenly arranging on the furnace wall below the fire grate.

Pyrolysis section among the present invention will make the pyrolysis of biomass abundant, and the tar major part is separated out in this section.

Aditus laryngis will make the pyrolysis gas can stable burning, adopts and arrange a plurality of air intake ducts on a cross section, and the air rotation sprays into the mechanism stable burning of aditus laryngis district to ignite mutually, thereby produces localized hyperthermia, makes most of coke tar cracking in the pyrolysis gas.

Gasification section will guarantee sufficiently high temperature on the fire grate, and gasification reaction is carried out smoothly.

Gasification section will guarantee certain thickness under the fire grate, makes gasification reaction complete.

Biomass are through after the pyrolysis tube pyrolysis of jacketed type, becoming pyrolysis gas and biomass char falls on the fire grate, the pyrolysis air-flow runs into the air that sprays in the air lance and burns in the dropping process when the aditus laryngis section, make whole zone form a stable state of combustion, with the most of Pintsch process of the tar of flowing through, pyrolysis gas after the burning, produces inflammable gass such as hydrogen, carbon monoxide and draws under fire grate through biomass char generating gasification reaction on the fire grate as vaporized chemical.The biomass char that falls within the fire grate of complete reaction does not still have high-content carbon, makes the carbon among Jiao continue gasification at bottom bubbling air and water vapour, with raising unit mass biomass gas generating amount, thus the gasification efficiency of raising vapourizing furnace.

The present invention is in conjunction with the pyrolysis characteristics of biomass, the combustioncharacteristics of geseous fuel and the gasification property of biomass char, pyrolysis section in the biomass gasification process and gasification section are separated, biomass produce gasification gas through pyrolysis, partial oxidation, two stage gasification process, utilize the high temperature that partial oxidation produces of aditus laryngis part to make most of coke tar cracking, thereby reduce tar content significantly, generation is applicable to the biomass gasified gas of combustion in IC engine, reaches clean and effective and utilizes this renewable energy source of biomass energy.

Description of drawings

Fig. 1 is a three-section type biomass gasifying furnace longitudinal section of the present invention.

Among Fig. 1,1 is biomass, and 2 is jacketed type pyrolysis tube, 3 is insulating layer of furnace body, 4 exhanst gas outlets for heating pyrolysis tube, 5 gas approachs for heating pyrolysis tube, 6 is air intake duct, 7 is aditus laryngis, 8 is biomass carbon-coating on the fire grate, and 9 is fire grate, and 10 are the outlet of gasification gas, 11 is biomass carbon-coating under the fire grate, and 12 are the undergrate blast pipe.

Embodiment

Below in conjunction with accompanying drawing technical scheme of the present invention is further described.

Three-section type biomass gasifying furnace structure of the present invention as shown in Figure 1, constitute by body of heater and pyrolysis tube, wherein: pyrolysis tube 2 adopts jacket type structure, one end of pyrolysis tube 2 stretches into the top of body of heater, the stove outside part of pyrolysis tube 2 is welded with one heart by the steel pipe of two different diameters, the logical flue gas of interlayer between the steel pipe also is equipped with and streams sheet, and steel pipe interlayer two ends are respectively equipped with exhanst gas outlet 4 and gas approach 5.

By biomass 1, pipe diameter is according to the flow decision of biomass in the narrow tube of pyrolysis tube 2 the insides.

Described body of heater is provided with thermal insulation layer 3, fire grate 9 is set in the body of heater body of heater is divided on the fire grate gasification section under the gasification section and fire grate.Fire grate 9 is made up of some equal legged angles, and the angle steel inboard is welded with rotary axle, with this biomass char is hit down.Body of heater ingress above fire grate 9 is provided with the round shape aditus laryngis 7 by the refractory concrete cast, and the cross-sectional area of aditus laryngis 7 is 0.3~0.5 times of body of heater cross-sectional area, is communicated with outside the stove along circumference uniform distribution air intake duct 6 in the middle of the aditus laryngis 7.Gasification gas outlet 10 is set, the bottom of furnace body blast pipe 12 of evenly arranging on the furnace wall below the fire grate 9.

After 2 pyrolysis of biomass 1 process jacketed type pyrolysis tube, become pyrolysis gas and biomass char, the pyrolysis air-flow runs into ejection in the air intake duct 6 when aditus laryngis 7 air burns, and makes whole zone form a stable state of combustion, with the most of Pintsch process of the tar of flowing through, the CO of generation 2Carry out gasification reaction with water vapour and biomass char, the biomass char of complete reaction is not fallen on the fire grate 9, generates biomass carbon-coating 8 on the fire grate.On the fire grate through primary first-order equation biomass fall behind down from fire grate, form biomass carbon-coating 11 under the fire grate at the vapourizing furnace furnace bottom, with air that enters from bottom air inlet pipe 12 and the reaction of water vapour generating gasification, biomass char is gasified totally again.The gasification gas outlet 10 of the combustible gas that reaction generates under fire grate drawn.

Claims (1)

1. a three-section type biomass gasifying furnace is made of body of heater and pyrolysis tube, it is characterized in that:
Described pyrolysis tube is a jacketed type pyrolysis tube (2), one end of pyrolysis tube (2) stretches into the top of body of heater, the stove outside part of pyrolysis tube (2) is welded with one heart by the steel pipe of two different diameters, the logical flue gas of interlayer between the steel pipe also is equipped with and streams sheet, and steel pipe interlayer two ends are respectively equipped with exhanst gas outlet (4) and gas approach (5);
Described body of heater is provided with thermal insulation layer (3), fire grate (9) is set in the body of heater body of heater is divided on the fire grate gasification section under the gasification section and fire grate; Fire grate (9) is made up of some equal legged angles, and the angle steel inboard is welded with rotary axle; Body of heater ingress in fire grate (9) top is provided with the round shape aditus laryngis (7) by the refractory concrete cast, the cross-sectional area of aditus laryngis (7) is 0.3~0.5 times of body of heater cross-sectional area, aditus laryngis (7) is middle outside circumference uniform distribution air intake duct (6) is communicated with stove, gasification gas outlet (10) is set, the bottom of furnace body blast pipe (12) of evenly arranging on the furnace wall of fire grate (9) below.
CN 200710047695 2007-11-01 2007-11-01 Three-section type biomass gasifying furnace CN101144022B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200710047695 CN101144022B (en) 2007-11-01 2007-11-01 Three-section type biomass gasifying furnace

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Application Number Priority Date Filing Date Title
CN 200710047695 CN101144022B (en) 2007-11-01 2007-11-01 Three-section type biomass gasifying furnace

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CN101144022A CN101144022A (en) 2008-03-19
CN101144022B true CN101144022B (en) 2010-05-19

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101747947B (en) * 2010-01-17 2012-09-05 太原理工大学 Gasification complex reaction device of pyrolysis fluidized bed of biomass moving bed
CN101955802B (en) * 2010-09-19 2013-03-20 合肥天焱绿色能源开发有限公司 Pyrolysis and gasification cracking furnace for solid biomass
CN102492489A (en) * 2011-12-08 2012-06-13 上海交通大学 Biomass staged oxygen-supplying gasification furnace and gasification method
CN102492475A (en) * 2011-12-08 2012-06-13 上海交通大学 Biomass adjustable furnace grate gasification furnace
CN103756729B (en) * 2014-02-19 2015-05-13 内蒙古科技大学 Pulse downdraft type high-temperature fixed bed gasification furnace
CN104152182B (en) * 2014-08-21 2016-08-17 潘凡峰 A kind of method of Biomass Gasification & Power Generation
CN104593090B (en) * 2014-12-25 2017-05-10 华中科技大学 Method and device for preparing synthesis gas by biomass pyrolysis and gasification
CN108611109B (en) * 2018-04-17 2020-04-24 东南大学 Three-section type heating device, and biological carbon preparation system and preparation method
CN111269735A (en) * 2020-01-21 2020-06-12 中国特种设备检测研究院 Biomass three-section type pressurizing high-temperature pyrolysis gasification device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2652933Y (en) * 2003-10-24 2004-11-03 周建亚 Biotic mass gasifying gas generating furnace
JP2006300501A (en) * 2005-04-20 2006-11-02 Nagasaki Kogyosho:Kk Downward moving bed type furnace

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2652933Y (en) * 2003-10-24 2004-11-03 周建亚 Biotic mass gasifying gas generating furnace
JP2006300501A (en) * 2005-04-20 2006-11-02 Nagasaki Kogyosho:Kk Downward moving bed type furnace

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