CN1221641C - Gasification furnace of inner circulating biomass fluidized bed of dissymmetrical structure - Google Patents
Gasification furnace of inner circulating biomass fluidized bed of dissymmetrical structure Download PDFInfo
- Publication number
- CN1221641C CN1221641C CN 200410051078 CN200410051078A CN1221641C CN 1221641 C CN1221641 C CN 1221641C CN 200410051078 CN200410051078 CN 200410051078 CN 200410051078 A CN200410051078 A CN 200410051078A CN 1221641 C CN1221641 C CN 1221641C
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- China
- Prior art keywords
- grid distributor
- furnace
- cloth wind
- gasification furnace
- cyclonic separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000002309 gasification Methods 0.000 title claims abstract description 31
- 239000002028 Biomass Substances 0.000 title abstract description 17
- 238000005192 partition Methods 0.000 claims abstract description 12
- 239000004744 fabric Substances 0.000 claims description 36
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000002956 ash Substances 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000010881 fly ash Substances 0.000 abstract 1
- 238000010992 reflux Methods 0.000 abstract 1
- 239000002893 slag Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The present invention provides a gasification furnace of an internal circulating biomass fluidized bed with a dissymmetrical structure. The gasification furnace comprises a furnace body, a cyclone separator and a fly ash reflux pipe, wherein the lower part of the furnace body is provided with an inclined wall surface to form an inverted round platform whose longitudinal section is in a right-angle trapezoid. Thus, one side adjacent to the cyclone separator forms a partition wall whose slope angle a is from 60 DEG to 75 DEG; an ash discharge passage is arranged on the partition wall. A wind distribution plate positioned at the bottom of the furnace body is in a dissymmetrical inverted cone structure; a slag discharge port is arranged on the top part of the dissymmetrical inverted cone; a wind hole with changeable aperture ratio is arranged on the wind distribution plate. The present invention uses a circulating fluidized bed furnace type combining external circulation and internal circulation, strengthens uneven wind distribution by the arrangement of the wind distribution plate with the dissymmetrical cone structure at the bottom of the fluidized-bed reaction furnace and the design of changeable aperture ratio, and reinforces the internal circulation flow of materials in the furnace. The gasification furnace can effectively realize the rapid gasification of biomass materials.
Description
Technical field
The present invention relates to a kind of device that biomass is carried out pyrolytic gasification.
Background technology
China's biomass resource reserves are very abundant, and as a kind of renewable energy source, its utilization can alleviate the pressure to the fossil oil demand, slows down Greenhouse effect simultaneously.Gasification technology can be converted to synthetic gas with biomass, generates electricity or synthetic liquid fuel, becomes one of important technology of current biomass utilization.
Prior biological matter vapourizing furnace mainly includes types such as fixed bed, fluidized-bed, circulating fluidized bed.Wherein, circulating fluidized bed technique is strong because of adaptability to raw material, and treatment scale is big, applied range and quite being paid attention to.Circulating fluidized bed generally is divided into outer circulation and two kinds of forms of internal recycle.External circulation fluidized bed is to make solid follow loop back path with high velocity air and high circulation ratio to do outer circulation, operation control more complicated, and serious wear in the stove.Internal Circulating Fluidized Bed mainly adopts the fluidized-bed flow characteristics of windy chamber, inhomogeneous cloth wind, realizes the fuel after-flame, and is simple in structure, and operation is convenient.CN2487738Y discloses the technical scheme of the inner circulation fluidized bed gasification furnace of a kind of iris type, this vapourizing furnace is regulated dividing plate both sides wind distribution plate simultaneously and is advanced internal pressure by dividing plate is set in burner hearth, and material is flowed at two reaction zone internal recycle, carry out repeatedly gasification reaction, improve vaporization rate.The fluidising air velocity of two reaction zones is bigger than more, and the internal recycle amount is also big more, but excessive wind speed can make high speed reaction zone elutriation carry secretly bigger.The circular fluid bed of the disclosed a kind of differential internal recycle of CN1070038A, its circle fluidized-bed gasification furnace is divided into three Room such as gas solid separation chamber, combustion chamber and vaporizer, by bottom the air distribution plate of inclination towards periphery is set at stove, realize the internal recycle gasification, but its shortcoming is that the particle internal circulating load is little.
Summary of the invention
The objective of the invention is at existing circle fluidized-bed gasification furnace existing problem in carrying out the biomass pyrogenation gasification process, propose a kind of outer circulation and internal recycle to be combined, can strengthen the endocorpuscular internal recycle of bed, alleviate the outer circulation operating pressure, realize the fuel internal recycle biomass fluidized bed gasification furnace of the unsymmetric structure of gasification fast.
The structure of the fluidized-bed gasification furnace that the present invention is designed comprises body of heater, cyclonic separator and ash return pipe, cyclonic separator is positioned at a side of body of heater, ash return pipe is inserted the combustion chamber of body of heater by the bottom of cyclonic separator, the bottom that it is characterized in that said body of heater makes up inclined wall, form the rectangular trapezoid reverse frustoconic in a vertical section, making a side near cyclonic separator form a pitch angle a is 60 °～75 ° partition wall, the bottom width L of this partition wall accounts for 1/4～1/3 of bottom of furnace body diameter, and in the body of wall of this partition wall, form an ash discharge passage vertically downward, the cloth wind grid distributor that is positioned at bottom of furnace body is an asymmetrical inverted cone-shaped structure, the summit of this asymmetrical back taper is positioned at the axis position of body of heater, slag-drip opening is located at the vertex of a cone position of said back taper, and lay in following change percentage of open area mode in the wind hole on the cloth wind grid distributor: the percentage of open area in the cloth wind grid distributor face windward hole of close cyclonic separator one side is less than the percentage of open area in the wind hole on the cloth wind grid distributor face of opposite side.
In circle fluidized-bed gasification furnace structure of the present invention, described cloth wind grid distributor is provided with the change percentage of open area by following scheme: be 3～5% at the percentage of open area near the cloth wind grid distributor face windward hole of cyclonic separator one side, the percentage of open area of large wind hole is 7～10% on the cloth wind grid distributor face of opposite side.
Described cloth wind grid distributor can adopt high silicon Heat-resistant Ductile Iron Containing casting to form, boring processing on its plate face again.The wind bore dia that the cloth wind grid distributor face of close cyclonic separator one side bores on cloth wind grid distributor is 3mm, and the wind bore dia that the cloth wind grid distributor face of opposite side bores is 5mm.
In circle fluidized-bed gasification furnace structure of the present invention, ash discharging hole separates with slag-drip opening, and the diameter of described ash discharge passage is 150～200mm, and the diameter of slag-drip opening is 250～500mm.Mainly based on row's bulk clinker, slag-drip opening is discharged difficult deslagging piece at the minimum position of cloth wind grid distributor with assurance to slag-drip opening; The height of described ash discharge passage is at least a times of cloth wind grid distributor diameter, to guarantee that material is stable in the stove.
The present invention adopts the circulating fluidized bed type of furnace that is combined by outer circulation and internal recycle, by asymmetrical pyramidal structure cloth wind grid distributor is set at the fluidized-bed reaction furnace bottom, become the percentage of open area design by means of air distribution plate simultaneously, strengthen inhomogeneous cloth wind, strengthening the interior material internal recycle of stove flows, and, can realize the quick gasification of biomass material effectively in conjunction with the outer circulation of the circulation loop of vapourizing furnace.
The internal recycle biomass fluidized bed gasification furnace of this unsymmetric structure of the present invention is specially adapted to the agro-ecology matter waste material that ash content is higher, ash melting point is lower, is converted to the utilization of synthetic combustible gas as husk, stalk etc.
Description of drawings
Fig. 1 represents the one-piece construction figure of the internal recycle biomass fluidized bed gasification furnace of unsymmetric structure of the present invention;
Embodiment
Be described in further detail below in conjunction with the CONSTRUCTED SPECIFICATION of accompanying drawing the internal recycle biomass fluidized bed gasification furnace embodiment of unsymmetric structure of the present invention.
The one-piece construction of the internal recycle biomass fluidized bed gasification furnace embodiment of unsymmetric structure of the present invention as shown in Figure 1,1 is the fluidized-bed gasification furnace body, side at body of heater is provided with cyclonic separator 2, and the bottom of cyclonic separator 2 has ash return pipe 3 to insert the combustion chamber of body of heater.Bottom at body of heater 1 makes up inclined wall, forms the rectangular trapezoid reverse frustoconic in a vertical section, makes in the side near cyclonic separator and forms the partition wall 4 that a pitch angle is about 70 °, and the bottom width L of this partition wall 4 accounts for 1/3 of bottom of furnace body diameter; Have ash discharge passage 5 in partition wall 4, diameter is 200mm, highly is about 1.5 times of cloth wind grid distributor 6 diameters; Cloth wind grid distributor 6 is positioned at the bottom of body of heater 1, is an asymmetrical inverted cone-shaped structure, and 7 is slag-drip opening, and diameter is 250mm, at the vertex of a cone position of the cloth wind grid distributor 6 of asymmetrical back taper, also is positioned at the axis position of body of heater; Cloth wind grid distributor 6 adopts high silicon Heat-resistant Ductile Iron Containing casting to form, on cloth wind grid distributor 6, be drilled with the wind hole, the diameter in the wind hole of the cloth wind grid distributor face of close cyclonic separator 2 one sides is 3mm, percentage of open area is 4%, the diameter in the wind hole of the cloth wind grid distributor face of opposite side is 5mm, and percentage of open area is 8%.When the internal recycle biomass fluidized bed gasification furnace of this unsymmetric structure moves, drop into biomass material by opening for feed 8, air blasts in the stove through cloth wind grid distributor 6, because the unsymmetric structure of cloth wind grid distributor 6 and the change percentage of open area in wind hole are provided with, in stove, form inhomogeneous cloth wind, making material form internal recycle along partition wall 4 in stove flows, the flue gas that is produced flows into cyclonic separator 2 from the top of body of heater 1, after cyclonic separator 2 separates the flying dust in the flue gas, by top output combustion gas, flying dust is then passed back in the stove by ash return pipe 3, constitutes outer circulation.The small-particle ashes that the stove internal combustion is produced can be discharged from ash discharge passage 5, and relatively large clinker can be discharged from slag-drip opening 7.
Claims (5)
1, a kind of circle fluidized-bed gasification furnace, comprise body of heater (1), cyclonic separator (2) and ash return pipe (3), cyclonic separator (2) is positioned at a side of body of heater, ash return pipe (3) is inserted the combustion chamber of body of heater (1) by the bottom of cyclonic separator (2), the bottom that it is characterized in that said body of heater (1) makes up inclined wall, form the rectangular trapezoid reverse frustoconic in a vertical section, making a side near cyclonic separator (2) form a pitch angle a is 60 °～75 ° partition wall (4), the bottom width L of this partition wall (4) accounts for 1/4～1/3 of bottom of furnace body diameter, and in the body of wall of this partition wall (4), form an ash discharge passage (5) vertically downward, the cloth wind grid distributor (6) that is positioned at body of heater (1) bottom is an asymmetrical inverted cone-shaped structure, the summit of this asymmetrical back taper is positioned at the axis position of body of heater (1), slag-drip opening (7) is located at the position, summit of said back taper, and lay in following change percentage of open area mode in the wind hole on the cloth wind grid distributor (6): the percentage of open area in the cloth wind grid distributor face windward hole of close cyclonic separator (2) one sides is less than the percentage of open area in the wind hole on the cloth wind grid distributor face of opposite side.
2, according to the said circle fluidized-bed gasification furnace of claim 1, it is characterized in that the percentage of open area in the cloth wind grid distributor face windward hole of close cyclonic separator (2) one sides is 3～5%, the percentage of open area of large wind hole is 7～10% on the cloth wind grid distributor face of opposite side.
3, according to the said circle fluidized-bed gasification furnace of claim 1, it is characterized in that the diameter in the wind hole of the cloth wind grid distributor face of close cyclonic separator (2) one sides on the cloth wind grid distributor (6) is 3mm, the diameter in the wind hole of the cloth wind grid distributor face of opposite side is 5mm.
4, according to the said circle fluidized-bed gasification furnace of claim 1, the diameter that it is characterized in that said ash discharge passage is 150～200mm, and the diameter of slag-drip opening is 250～500mm.
5, according to the said circle fluidized-bed gasification furnace of claim 1, the height that it is characterized in that said ash discharge passage (5) is at least a times of cloth wind grid distributor (6) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051078 CN1221641C (en) | 2004-08-16 | 2004-08-16 | Gasification furnace of inner circulating biomass fluidized bed of dissymmetrical structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051078 CN1221641C (en) | 2004-08-16 | 2004-08-16 | Gasification furnace of inner circulating biomass fluidized bed of dissymmetrical structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1597846A CN1597846A (en) | 2005-03-23 |
| CN1221641C true CN1221641C (en) | 2005-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410051078 Expired - Lifetime CN1221641C (en) | 2004-08-16 | 2004-08-16 | Gasification furnace of inner circulating biomass fluidized bed of dissymmetrical structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1221641C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519606B (en) * | 2009-04-03 | 2012-04-04 | 中国科学院山西煤炭化学研究所 | Gas distribution device |
| CN101900327B (en) * | 2010-09-08 | 2011-06-22 | 山东希尔生物质能源有限公司 | Biomass fuel inner circulation mechanical fluidized bed corner tube boiler |
| CN102876339B (en) * | 2012-10-17 | 2013-12-25 | 哈尔滨工业大学 | Gasification and splitting reaction device |
| CN104634504B (en) * | 2015-02-27 | 2017-01-11 | 水煤浆气化及煤化工国家工程研究中心 | Device for accurately measuring pressure difference of slag hole of gasification furnace and measurement method thereof |
| CN106753581B (en) * | 2017-03-01 | 2018-04-10 | 中聚信海洋工程装备有限公司 | A kind of circle fluidized-bed gasification furnace ladder wind beam air distribution plate |
| US10934499B2 (en) * | 2017-03-01 | 2021-03-02 | Zhongkejuxin Clean Energy & Hot Forging Equipment Research And Development Co., Ltd | Internally self-circulating fluidized bed gasifier and air distributor therein for generating stepped constrained wind |
| CN106753580B (en) * | 2017-03-01 | 2018-04-10 | 中聚信海洋工程装备有限公司 | Self-loopa fluidized-bed gasification furnace in a kind of stove |
-
2004
- 2004-08-16 CN CN 200410051078 patent/CN1221641C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1597846A (en) | 2005-03-23 |
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| C14 | Grant of patent or utility model | ||
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Owner name: SHENZHEN CARBONNEUTRAL BIO-GAS CO., LTD. Free format text: FORMER OWNER: GUANGZHOU ENERGY SOURCE INST., C.A.S. Effective date: 20110804 |
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Free format text: CORRECT: ADDRESS; FROM: 510640 GUANGZHOU, GUANGDONG PROVINCE TO: 518019 SHENZHEN, GUANGDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110804 Address after: 518019 No. 1008 Taibai Road, Shenzhen, Luohu District Patentee after: SHENZHEN CARBONNEUTRAL BIO-GAS Co.,Ltd. Address before: Guangzhou City, Guangdong province 510640 energy road No. 1 Tianhe District Wushan Patentee before: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences |
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| CX01 | Expiry of patent term |
Granted publication date: 20051005 |
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| CX01 | Expiry of patent term |