CN103396838A - Downdraft gasifier capable of realizing efficient self purification of tar - Google Patents
Downdraft gasifier capable of realizing efficient self purification of tar Download PDFInfo
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- CN103396838A CN103396838A CN2013103234919A CN201310323491A CN103396838A CN 103396838 A CN103396838 A CN 103396838A CN 2013103234919 A CN2013103234919 A CN 2013103234919A CN 201310323491 A CN201310323491 A CN 201310323491A CN 103396838 A CN103396838 A CN 103396838A
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- coke
- gas
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- tar
- pit kiln
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Abstract
The invention relates to the field of gasification of coal or biomass, and in particular relates to a downdraft gasifier capable of realizing efficient self purification of tar. The downdraft gasifier comprises a coke oven, a gasifier and the like. The working principle is that the coke oven decomposes materials (coal or biomass fuel) into coke-oven gas and coke, then the coke-oven gas is mixed with a gasifying agent (air, enriched oxygen or pure oxygen) to be combusted so as to thoroughly remove tar, and the coke-oven gas and air subjected to combustion are converted into combustible gas by the downdraft gasifier. The downdraft gasifier can be used for gas supply of power plants, industry and residents, and a small downdraft gasifier can be used for gas supply of families.
Description
Technical field
The present invention relates to coal or gasifying biomass field, particularly relate to the efficiently down-draft type gasifying furnace of self-purification tar.
Background technology
The generation mode of integrated gasification hot air circulate (IGHAT), the investment of founding the factory is minimum, and effciency of energy transfer is up to 60%.But IGHAT is not commercialization slowly, and its major obstacle is in combustible gas, to contain higher tar and flying dust, because internal combustion turbine requires the tar content in combustible gas to be no more than 0.02～0.05g/m
3.The device that material (coal or biomass fuel) is converted into to combustible gas claims vapourizing furnace.Present known vapourizing furnace has: updraft type vapourizing furnace, fluidized-bed gasification furnace and down-draft type gasifying furnace etc.The order of magnitude of the content of various vapourizing furnace combustible gas tar is: updraft type vapourizing furnace 100g/m
3Fluidized-bed gasification furnace 10g/m
3The tar of down-draft type gasifying furnace is through peroxidation and reduction zone, and burning and cracking have occurred major part, and the tar content of combustible gas is minimum, is 1g/m
3, but can't meet the requirement of internal combustion turbine.From present most of gasifying process, the combustible gas tar content is 2～50g/m
3, therefore need the tar of removal 99～99.9% just can reach the gasifying electricity generation requirement.
Summary of the invention
The efficiently down-draft type gasifying furnace of self-purification tar that the purpose of this invention is to provide, can be reduced to the tar content in combustible gas without purifying and just can directly enter internal combustion turbine.
The efficiently down-draft type gasifying furnace of self-purification tar by this order provides, comprise the formations such as pit kiln and down-draft type gasifying furnace.Principle of work is: pit kiln first resolves into coke(oven)gas and coke to material (coal or biomass fuel), then coke(oven)gas and vaporized chemical (air, oxygen enrichment or pure oxygen) mixed firing, thoroughly to dispose tar, the coke(oven)gas after burning and air change into combustible gas through down-draft type gasifying furnace again.
Fig. 1 is structure principle chart of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Referring to Fig. 1, efficiently the down-draft type gasifying furnace of self-purification tar, comprise the formations such as pit kiln 1 and down-draft type gasifying furnace 2, it is characterized in that, described pit kiln 1 is arranged on above down-draft type gasifying furnace 2, so that the coke that generates can be fallen on down-draft type gasifying furnace 2; Pit kiln 1 is interior arranges an inner bag 3, makes between furnace wall 4 and inner bag 3 to form an interlayer 10, and the combustible gas of high temperature is from flowing through interlayer 10, makes the heat in combustible gas can be by the conduction of inner bag 3 and the material of radiation heating pit kiln 1 the inside; The top of pit kiln 1 is also arranging coke(oven)gas conduit 9 and is being attached thereto logical vacuum fan 5, make can constantly be taken away by the coke(oven)gas that pit kiln 1 produces, coke(oven)gas makes to be in micro-vacuum state in pit kiln 1, so that can not flow to following down-draft type gasifying furnace 2 through trunnion district 7; Coke(oven)gas conduit 9 leads to coke(oven)gas combustion chamber 6 to coke(oven)gas and fully burns with the vaporized chemical from vaporized chemical conduit 8, and thoroughly to dispose tar, the coke(oven)gas after burning and vaporized chemical change into combustible gas through down-draft type gasifying furnace 2 again.
during work, material adds the top in pit kiln 1 to by feeding unit 12, from the vaporized chemical of vaporized chemical conduit 8 enter trunnion district 7 with by above pit kiln 1, moving the coke generation oxidation heat liberation that gets off, the high-temperature gas that produces directly upwards circulates and adds thermal material from the material gap, add the combustible gas of high temperature through the interlayer 10 between inner bag 3 and furnace wall 4, make heat by the conduction of inner bag 3 and be radiated on the material of pit kiln 1 inside, make the vapourizing furnace that material ratio is general that drying and pyrolysis occur more efficiently, the coke(oven)gas that produces is constantly taken away by vacuum fan 5, make to be in micro-vacuum state in pit kiln 1, to allow coke(oven)gas can not flow to following down-draft type gasifying furnace 2 through trunnion district 7.Simultaneously, coke(oven)gas flows to coke(oven)gas combustion chamber 6 from coke(oven)gas conduit 9 and fully burns with the vaporized chemical from vaporized chemical conduit 8, thoroughly to dispose tar, trunnion district 7 following reduction zone and the coke that the high-temperature gas that has burnt enters down-draft type gasifying furnace 2 are reduced into combustible gas, and then combustible gas is discharged by combustible gas conduit 11 after interlayer 10.
The allocation proportion of pit kiln 1 and volume, size and the air of down-draft type gasifying furnace 2, because size, kind, the water content of material particles are different and different, be optimized design according to practical situation.
The present invention compares with present known several vapourizing furnaces, and coke(oven)gas is first through with air, fully burning, therefore finally atomic from the tar content the combustible gas that vapourizing furnace is discharged.And purifying the cooling combustible gas of tar process need washing, this can lose the energy of sensible heat, simultaneously, the removing of tar also equals expended energy, because tar itself is exactly a kind of fuel, accounts for greatly 5～10% of combustible gas energy, therefore, the present invention is for IGHAT, and the efficiency of generating can surpass 60%.
With the experiment of my packaged unit, find almost there is no tar in sum, combustible gas calorific value high (because the water vapour in coke(oven)gas also participates in gasification).If vapourizing furnace adopts supercharging, combustible gas can directly enter internal combustion turbine without boosting, and efficiency is higher.Except generating, also can be for industry and resident's air feed.Small-sized device can be for household use.
Claims (1)
1. the efficient down-draft type gasifying furnace of self-purification tar, comprise that pit kiln (1) and down-draft type gasifying furnace (2) form, it is characterized in that, described pit kiln (1) is arranged on above down-draft type gasifying furnace (2), so that the coke that generates can be fallen on down-draft type gasifying furnace (2); An inner bag (3) is set in pit kiln (1), make between furnace wall (4) and inner bag (3) to form an interlayer (10), the combustible gas of high temperature, from interlayer (10), flowing through, makes the heat in combustible gas can pass through the conduction of inner bag (3) and the material of radiation heating pit kiln (1) the inside; The top of pit kiln (1) is also arranging coke(oven)gas conduit (9) and is being attached thereto logical vacuum fan (5), make can constantly be taken away by the coke(oven)gas that pit kiln (1) produces, coke(oven)gas makes to be in micro-vacuum state in pit kiln (1), so that can not flow to following down-draft type gasifying furnace (2) through trunnion district (7); Coke(oven)gas conduit (9) leads to coke(oven)gas combustion chamber (6) to coke(oven)gas and fully burns with the vaporized chemical from vaporized chemical conduit (8), thoroughly to dispose tar, the coke(oven)gas after burning and vaporized chemical pass through down-draft type gasifying furnace (2) again and change into combustible gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103234919A CN103396838A (en) | 2013-07-19 | 2013-07-19 | Downdraft gasifier capable of realizing efficient self purification of tar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103234919A CN103396838A (en) | 2013-07-19 | 2013-07-19 | Downdraft gasifier capable of realizing efficient self purification of tar |
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| CN103396838A true CN103396838A (en) | 2013-11-20 |
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| CN2013103234919A Pending CN103396838A (en) | 2013-07-19 | 2013-07-19 | Downdraft gasifier capable of realizing efficient self purification of tar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087077A (en) * | 2014-05-05 | 2015-11-25 | 汪春雷 | Internal heat vertical type garbage full vapourizing furnace |
| CN107384455A (en) * | 2017-09-05 | 2017-11-24 | 赵升智 | Downdraft radiant tube biomass pyrolytic charcoal processing stove |
| CN108085066A (en) * | 2018-01-30 | 2018-05-29 | 北京阳华科技有限公司 | A kind of Central oxygen-supply water cooling wall-shaped fixed-bed gasification furnace |
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| CN1900241A (en) * | 2006-06-21 | 2007-01-24 | 广西大学 | Process for making combustable gas by external high temperature CO2 and biomass reducing reaction |
| CN101225315A (en) * | 2007-12-18 | 2008-07-23 | 中国科学院广州能源研究所 | Method and device for biomass compound gasification |
| CN101294092A (en) * | 2007-04-25 | 2008-10-29 | 中国科学院过程工程研究所 | Combined thermal transition method and apparatus for solid fuel |
| CN201158629Y (en) * | 2007-12-15 | 2008-12-03 | 周开根 | Rubbish biomass poly-generation processing system and equipment |
| WO2010136669A2 (en) * | 2009-05-25 | 2010-12-02 | Point, Jacques | Novel method for pyrogasification of organic waste |
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2013
- 2013-07-19 CN CN2013103234919A patent/CN103396838A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2562081Y (en) * | 2002-07-05 | 2003-07-23 | 北京浩业达高新技术发展有限公司 | Intermediate shaped refuse gasification furnaces |
| CN1900241A (en) * | 2006-06-21 | 2007-01-24 | 广西大学 | Process for making combustable gas by external high temperature CO2 and biomass reducing reaction |
| CN101294092A (en) * | 2007-04-25 | 2008-10-29 | 中国科学院过程工程研究所 | Combined thermal transition method and apparatus for solid fuel |
| CN201158629Y (en) * | 2007-12-15 | 2008-12-03 | 周开根 | Rubbish biomass poly-generation processing system and equipment |
| CN101225315A (en) * | 2007-12-18 | 2008-07-23 | 中国科学院广州能源研究所 | Method and device for biomass compound gasification |
| WO2010136669A2 (en) * | 2009-05-25 | 2010-12-02 | Point, Jacques | Novel method for pyrogasification of organic waste |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087077A (en) * | 2014-05-05 | 2015-11-25 | 汪春雷 | Internal heat vertical type garbage full vapourizing furnace |
| CN107384455A (en) * | 2017-09-05 | 2017-11-24 | 赵升智 | Downdraft radiant tube biomass pyrolytic charcoal processing stove |
| CN108085066A (en) * | 2018-01-30 | 2018-05-29 | 北京阳华科技有限公司 | A kind of Central oxygen-supply water cooling wall-shaped fixed-bed gasification furnace |
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Application publication date: 20131120 |