CN103361122A - Gasifying furnace capable of efficiently self-purifying tar - Google Patents
Gasifying furnace capable of efficiently self-purifying tar Download PDFInfo
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- CN103361122A CN103361122A CN2013103234923A CN201310323492A CN103361122A CN 103361122 A CN103361122 A CN 103361122A CN 2013103234923 A CN2013103234923 A CN 2013103234923A CN 201310323492 A CN201310323492 A CN 201310323492A CN 103361122 A CN103361122 A CN 103361122A
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- coke
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Abstract
The invention relates to the coal or biomass gasification field, and especially relates to a gasifying furnace capable of efficiently self-purifying tar. The gasifying furnace capable of efficiently self-purifying tar comprises a coke oven and a gasifier. The work principle of the gasifying furnace capable of efficiently self-purifying tar is characterized in that the coke oven decomposes a material (a coal or biomass fuel) into a coke oven gas and coke and allows the mixed combustion of the coke oven gas and a gasifying agent (air, an oxygen-rich gas or pure oxygen) to be carried out in order to thoroughly remove the tar, the combusted coke oven gas and the gasifying agent are converted into a combustible gas by the updraught gasifier, and the combustible gas goes through a soft coke layer for filtering out most fly ash.
Description
Technical field
The present invention relates to coal or gasifying biomass field, particularly relate to the efficiently vapourizing 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 to contain higher tar and flying dust in the combustible gas, because internal combustion turbine requires the tar content in the combustible gas to be no more than 0.02～0.05g/m
3The device that material (coal or biomass fuel) is converted into 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 occured major part, and the tar content of combustible gas is minimum, is 1g/m
3, but can't satisfy 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.Updraft type vapourizing furnace combustible gas has certain filteration through pyrolysis zone and drying zone, and flying dust is less; CFB fly ash is maximum.
Summary of the invention
The purpose of this invention is to provide the efficiently vapourizing furnace of self-purification tar, can be reduced to the tar content in the combustible gas to need not to purify and just can directly enter internal combustion turbine, and flying dust is also less.
The efficiently vapourizing furnace of self-purification tar by this order provides comprises the formations such as pit kiln and vapourizing furnace.Principle of work is: pit kiln resolves into coke(oven)gas and coke to material (coal or biomass fuel) first, then coke(oven)gas and vaporized chemical (air, oxygen enrichment or pure oxygen) mixed firing, thoroughly to dispose tar, coke(oven)gas after the burning and vaporized chemical change into combustible gas through the updraft type vapourizing furnace again, and combustible gas filters out most of flying dust through softening coke layer again.
Description of drawings
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 vapourizing furnace of self-purification tar comprises the formations such as pit kiln 1 and updraft type vapourizing furnace 2, it is characterized in that described pit kiln 1 is arranged on above the updraft type vapourizing furnace 2, so that the coke that generates can be fallen on the updraft type vapourizing furnace 2; Pit kiln 1 is interior to arrange an inner bag 3, makes to form an interlayer 11 between furnace wall 4 and the inner bag 3, and the combustible gas of high temperature flows through from interlayer 11, makes the heat in the 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 13 and is being attached thereto logical vacuum fan 5, the coke(oven)gas that is produced by pit kiln 1 can constantly be taken away, coke(oven)gas makes in the pit kiln 1 to be in micro-vacuum state, so that can not flow to following updraft type vapourizing furnace 2 through trunnion district 7; Coke(oven)gas conduit 13 leads to coke(oven)gas combustion chamber 6 to coke(oven)gas and fully burns with vaporized chemical from vaporized chemical conduit 8, and thoroughly to dispose tar, the coke(oven)gas after the burning and vaporized chemical pass through updraft type vapourizing furnace 2 again and change into combustible gas.
During work, material adds top in the pit kiln 1 to by feeding unit 14, from the vaporized chemical of vaporized chemical conduit 8 enter trunnion district 7 with by moving the material generation oxidation heat liberation that gets off above the pit kiln 1, the high-temperature gas that produces directly upwards circulates from the material gap and adds thermal material, add the combustible gas of high temperature through the interlayer 11 between inner bag 3 and the furnace wall 4, make heat be radiated on the material of pit kiln 1 inside by inner bag 3, make the general vapourizing furnace of material ratio that drying and pyrolysis occur more efficiently, produce coke(oven)gas and coke with this.Coke is fallen on the updraft type vapourizing furnace 2 gradually, and coke(oven)gas is constantly taken away by vacuum fan 5, makes in the pit kiln 1 to be in micro-vacuum state, so that coke(oven)gas can not flow to following updraft type vapourizing furnace 2 through trunnion district 7.Simultaneously, coke(oven)gas flows to coke(oven)gas combustion chamber 6 from coke(oven)gas conduit 13 and fully burns with vaporized chemical from vaporized chemical conduit 8, thoroughly to dispose tar.Reduction zone and coke that the high-temperature gas that has burnt enters updraft type vapourizing furnace 2 are reduced into combustible gas, and simultaneously a part of vaporized chemical from vaporized chemical conduit 8 enters grate 9 by gas inlet 10, and grate 9 is played the effect of cooling, make the work of grate 9 more reliable.Simultaneously, vaporized chemical on grate 9 with coke generation oxidation heat liberation, the high-temperature gas of generation is reduced into combustible gas through top reduction zone and coke, then combustible gas passes through the coke of the reduction zone of updraft type vapourizing furnace 2 again.Owing to just reach more than 1200 ℃ from the fallen coke temperature of top reducing zone, coke 1000 ℃ will deliquescing, become molten state, the surface is softening to become sticky, therefore, can adsorb and filter out most of flying dust, then combustible gas is through being discharged by combustible gas conduit 12 behind the interlayer 11.
The allocation proportion of pit kiln of the present invention and volume, size and the air of updraft type vapourizing furnace will be optimized design according to practical situation because size, kind, the water content of material particles are different and different.
Compare with the updraft type vapourizing furnace, although updraft type vapourizing furnace combustible gas has certain filteration through pyrolysis zone and drying zone, filter effect does not have the present invention good, because the pyrolysis zone temperature only has 500～700 ℃, coke does not also become molten state.
Compare with down-draft type gasifying furnace, coke(oven)gas of the present invention is first through fully burning with vaporized chemical, so finally the tar content from the combustible gas that vapourizing furnace is discharged is atomic.Although and the coke(oven)gas of down-draft type gasifying furnace is through peroxidation and reduction zone, because in the most of oxygen of oxidation zone and carbon generation oxidizing reaction, therefore, the tar in the coke(oven)gas can't perfect combustion and cracking fall, also can stay 2g/m
3Tar.Say again, purify the washing of tar process need and cooling combustible gas, 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, the energy of various vapourizing furnace combustible gas tar accounts for greatly 5～10% of combustible gas, therefore, the present invention is used for IGHAT, and the efficient of generating can surpass 60%.
Find almost do not have tar and fly ash content seldom in the combustible gas with the experiment of my packaged unit in sum, combustible gas calorific value high (because the water vapour in the coke(oven)gas also participates in gasification).If vapourizing furnace adopts supercharging, combustible gas need not to boost and can directly enter internal combustion turbine, and efficient is higher.Except generating, also can be used for industry and resident's air feed.Small-sized device can be for household use.
Claims (1)
1. the efficient vapourizing furnace of self-purification tar, comprise that pit kiln (1) and updraft type vapourizing furnace (2) consist of, it is characterized in that, described pit kiln (1) is arranged on above the updraft type vapourizing furnace (2), so that the coke that generates can be fallen on the updraft type vapourizing furnace (2); An inner bag (3) is set in the pit kiln (1), make and form an interlayer (11) between furnace wall (4) and the inner bag (3), the combustible gas of high temperature flows through from interlayer (11), makes the heat in the 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 (13) and is being attached thereto logical vacuum fan (5), the coke(oven)gas that is produced by pit kiln (1) can constantly be taken away, coke(oven)gas makes in the pit kiln (1) to be in micro-vacuum state, so that can not flow to following updraft type vapourizing furnace (2) through trunnion district (7); Coke(oven)gas conduit (13) leads to coke(oven)gas coke(oven)gas combustion chamber (6) and fully burns from the vaporized chemical of vaporized chemical conduit (8), thoroughly to dispose tar, the coke(oven)gas after the burning and vaporized chemical pass through updraft type vapourizing furnace (2) again and change into combustible gas.
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| CN2013103234923A CN103361122A (en) | 2013-07-19 | 2013-07-19 | Gasifying furnace capable of efficiently self-purifying tar |
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| CN2013103234923A CN103361122A (en) | 2013-07-19 | 2013-07-19 | Gasifying furnace capable of efficiently self-purifying tar |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103642530A (en) * | 2013-12-04 | 2014-03-19 | 张秀军 | Counterflow burning type coal gasifier device and process thereof |
| CN104711027A (en) * | 2015-03-13 | 2015-06-17 | 罗世学 | Precombustion tar-removal coal gas preparation method |
| CN106833752A (en) * | 2017-01-25 | 2017-06-13 | 浙江大学 | The house refuse of three-stage technique cooperates with pyrolysis gasifying device and method with high-alkali coal |
| 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 |
| CN108130132A (en) * | 2018-01-30 | 2018-06-08 | 北京阳华科技有限公司 | A kind of classification oxygen supply water cooling wall-shaped fixed-bed gasification furnace |
| CN108179034A (en) * | 2018-03-09 | 2018-06-19 | 应佩荣 | The downdraft combustion furnace of bamboo timber stoving and bamboo and wood charcoal production zero-emission cigarette is realized simultaneously |
| CN109705923A (en) * | 2019-02-26 | 2019-05-03 | 广东工业大学 | A kind of domestic garbage gasification device and technique |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103642530A (en) * | 2013-12-04 | 2014-03-19 | 张秀军 | Counterflow burning type coal gasifier device and process thereof |
| CN103642530B (en) * | 2013-12-04 | 2015-08-26 | 张秀军 | Counter-burning type gasification of coal furnace apparatus and technique |
| CN104711027A (en) * | 2015-03-13 | 2015-06-17 | 罗世学 | Precombustion tar-removal coal gas preparation method |
| CN106833752A (en) * | 2017-01-25 | 2017-06-13 | 浙江大学 | The house refuse of three-stage technique cooperates with pyrolysis gasifying device and method with high-alkali coal |
| CN106833752B (en) * | 2017-01-25 | 2019-11-29 | 浙江大学 | The house refuse of three-stage technique cooperates with pyrolysis gasifying device and method with high-alkali coal |
| 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 |
| CN108130132A (en) * | 2018-01-30 | 2018-06-08 | 北京阳华科技有限公司 | A kind of classification oxygen supply water cooling wall-shaped fixed-bed gasification furnace |
| CN108179034A (en) * | 2018-03-09 | 2018-06-19 | 应佩荣 | The downdraft combustion furnace of bamboo timber stoving and bamboo and wood charcoal production zero-emission cigarette is realized simultaneously |
| CN109705923A (en) * | 2019-02-26 | 2019-05-03 | 广东工业大学 | A kind of domestic garbage gasification device and technique |
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Application publication date: 20131023 |