CN100445351C - Double lift pipe circulation fluidized bed coal gasifying device - Google Patents
Double lift pipe circulation fluidized bed coal gasifying device Download PDFInfo
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- CN100445351C CN100445351C CNB2005100449257A CN200510044925A CN100445351C CN 100445351 C CN100445351 C CN 100445351C CN B2005100449257 A CNB2005100449257 A CN B2005100449257A CN 200510044925 A CN200510044925 A CN 200510044925A CN 100445351 C CN100445351 C CN 100445351C
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- bed
- fluidized
- pyrolysis
- fluidized bed
- gasification
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- 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]
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The present invention provides a coal gasification device of a circulating fluid bed with double ascending pipes, which is a gasification device of a circulating fluid bed for decoupling in the pyrolysis process and the gasification process of coal. The pyrolysis process of the coal is realized in one ascending pipe; semi-coke generated by the pyrolysis is partially combusted at the bottom of the other ascending pipe, and is gasified in the middle and on the upper part of the ascending pipe. Because air is not added in the ascending pipes of the circulating fluid bed for gasification, water gas with high concentration (the concentration sum of carbon monoxide and hydrogen) can be prepared by the double ascending pipes. The system can realize favorable gas-solid contact conditions by regulating the gas superficial velocity of the double ascending pipes, the circulating rate of granules and the feeding positions of materials; especially, the operation of the double ascending pipes can be respectively regulated, so an air separation device with a huge amount of investment can be omitted. The present invention decreases operation difficulty and achieves the purposes of wide fuel adaptability, high gasification efficiency, little environment pollution and wide load regulation range.
Description
Technical field:
The present invention relates to a kind of energy project circulation fluidized bed coal gasifying technology, particularly double lift pipe circulation fluidized bed coal gasifying technology, to realize, clean utilization efficient to coal resources.
Background technology:
China is the abundant country of a coal resource, also is a coal-fired big country, and coal accounts for 75% of primary energy source total quantity consumed, and in considerable time from now on, this energy structure based on coal does not have too big variation.The coal resources clean utilization can promote the sound development of China's energy industry, also helps protecting environment.Circulation fluidized bed coal gasifying technology is the tap of clean coal technology, and its research and development has important economy and environment protection significance.
With coal is raw material, utilizes the circulation fluidized bed coal gasifying technology to make synthetic gas, is converted into hydrogen then, and such technology has advantages such as cost is low, industrial scale is big.If adopt the gas making of air cycle fluidized-bed, the nitrogen separation that then follow-up synthetic gas and air are brought into need consume a large amount of merits, bring circulating fluidized bed system into for fear of a large amount of nitrogen, traditional circulation fluidized bed coal gasifying process adopts oxygen-rich air and pure oxygen gas making usually, and oxygen-rich air and pure oxygen coal gasification course need be equipped with the huge air separation facility of investment, and the investment of this kind air separation facility to be middle-size and small-size refinery be difficult to bear.
Summary of the invention:
At the deficiencies in the prior art, the present invention proposes the thought of double lift pipe, purpose is that a kind of pyrolytic process of coal and the ciculation fluidized bed gasifying apparatus of gasification decoupling zero will be provided, the pyrolytic process of coal is realized in a upcast, the semicoke that pyrolysis produces burns at another upcast base section, and gasifies on the middle part and the top of upcast.
The objective of the invention is to be achieved through the following technical solutions: the gasification circulating fluidized bed device is mainly by the pyrolysis fluidized-bed, the ciculation fluidized burning bed of pyrolysis, the gasification circulating fluidized bed, feed hopper, feeding screw, blower fan, composition such as cyclonic separator and pneumavalve, it is characterized in that feed hopper links to each other with feeding screw, feeding screw links to each other with the pyrolysis fluidized-bed, the pyrolysis fluidized-bed links to each other by the ciculation fluidized burning bed of pneumavalve and pyrolysis, the ciculation fluidized burning bed of pyrolysis is coupled by the cyclonic separator import, and this cyclonic separator links to each other with bubbling fluidized bed by its bottom solid outlet.Bubbling fluidized bed has a branch road to link to each other with the pyrolysis fluidized-bed by pneumavalve, another branch road links to each other with ciculation fluidized gasifier bed by pneumavalve, ciculation fluidized gasifier bed is coupled by the cyclonic separator import, and this cyclonic separator links to each other with bubbling fluidized bed by its bottom solid outlet.The bottom of pyrolysis circulating fluidized bed connects blower fan.Four fluidized-bed tops are connected with a cyclonic separator respectively, and four fluidized-bed tops are connected with the import of cyclonic separator, are used to separate the granule materials of elutriation.
Gasification system solid particulate circulation realizes that as follows the fine coal in the feed hopper enters the pyrolysis fluidized-bed by feeding screw through weighing after, contacts formation bubbling fluidization state with air from blower fan; Fine coal in the pyrolysis fluidized-bed and semicoke enter the ciculation fluidized burning bed of pyrolysis behind pneumavalve, contact with air from blower fan, form ciculation fluidized state, and are transported to cyclonic separator with gas; Fine coal or semicoke after the separation enter bubbling fluidized bed, contact with air from blower fan, form the bubbling fluidization state; Fine coal in the bubbling bed or semicoke divide two-way to flow out: the one tunnel is to return pyrolysis fluidized bed combustion bed through pneumavalve, another road is to enter the gasification circulating fluidized bed behind pneumavalve, contact with air, form fluidized state, and be transported to cyclonic separator with air from blower fan; Fine coal or semicoke after the separation return bubbling fluidized bed.
Owing to do not add air in the gasification circulating fluidized bed upcast, thereby adopt double lift pipe can make high density (carbon monoxide and density of hydrogen sum) water-gas.This system can realize the good gas-solid situation that contacts by regulating double lift pipe gas superficial velocity, particle cycle rate, material feed entrance point, especially the double lift pipe operation can be regulated respectively, can save the huge air separation facility of investment cost, reduce operation easier, can reach the purpose that fuel tolerance is wide, gasification efficiency is high, environmental pollution is little, load regulation range is big.
Description of drawings:
Fig. 1 is the schematic flow sheet according to double lift pipe circulation fluidized bed coal gasifying device proposed by the invention.
Among the figure: the 1-feed hopper; The 2-feeding screw; 3-pyrolysis fluidized-bed; The 4-cyclonic separator; The 5-pneumavalve; The ciculation fluidized burning bed of 6-pyrolysis; The 7-cyclonic separator; The 8-bubbling fluidized bed; The 9-pneumavalve; The 10-pneumavalve; The 11-circulating fluidized bed that gasifies; The 12-cyclonic separator; The 13-steam valve; The 14-blower fan; The 15-steam valve; The 16-steam valve; The 17-cyclonic separator; The 18-steam valve; The 19-boiler.
Embodiment:
Describe concrete structure of the present invention and preferred forms in detail below in conjunction with accompanying drawing.
As shown in Figure 1, device of the present invention mainly comprises feed hopper 1, feeding screw 2, pyrolysis fluidized-bed 3, cyclonic separator 4,7,12,17, pneumavalve 5,9,10, the ciculation fluidized burning bed 6 of pyrolysis, bubbling fluidized bed 8, gasification circulating fluidized bed 11, steam valve 13,15,16,18, blower fan 14, boiler 19.Feed hopper 1 links to each other with feeding screw 2, the outlet of feeding screw 2 links to each other with pyrolysis fluidized-bed 3, pyrolysis fluidized-bed 3 is connected by the ciculation fluidized burning bed 6 of pneumavalve 5 and pyrolysis, the top of the ciculation fluidized burning bed 6 of pyrolysis is connected with it by cyclonic separator 7 imports, and this cyclonic separator is connected with bubbling fluidized bed 8 by its bottom solid outlet.The outlet of bubbling fluidized bed 8 divides two branch roads, article one, branch road links to each other with pyrolysis fluidized-bed 3 by pneumavalve 9, another branch road links to each other with gasification circulating fluidized bed 11 by pneumavalve 10, gasification circulating fluidized bed 11 is connected with it by cyclonic separator 12 imports, and this cyclonic separator is connected with bubbling fluidized bed 8 by its bottom solid outlet.The bottom of the ciculation fluidized burning bed 6 of pyrolysis connects blower fan 14.The top of four fluidized-beds is connected to a cyclonic separator respectively, is used to separate the granule materials of elutriation.
Concrete flow process is: the fine coal in the feed hopper 1 enters pyrolysis fluidized-bed 3 by feeding screw 2 after weighing, and contacts with air from blower fan 14, forms the bubbling fluidization state; Fine coal in the pyrolysis fluidized-bed 3 and semicoke enter the ciculation fluidized burning bed 6 of pyrolysis behind pneumavalve 5, contact with air from blower fan 14, form ciculation fluidized state, steam joins in the pyrolysis fluidized-bed at pyrolysis upcast certain altitude, and is transported to cyclonic separator 7 with air; Fine coal after the separation or semicoke enter bubbling fluidized bed 8, contact with steam from boiler 19, form the bubbling fluidization state; Fine coal in the bubbling bed 8 or semicoke divide two-way to flow out: the one tunnel is to return pyrolysis fluidized-bed 3 to keep the stable of bed height in the bubbling bed 8 through pneumavalve 9, another road is to enter gasification circulating fluidized bed 11 behind pneumavalve 10, contact with steam from boiler 19, form fluidized state, and be transported to cyclonic separator 12 with air; Fine coal after the separation or semicoke return bubbling fluidized bed 8.
The present invention compared with prior art has following advantage and usefulness: the 1. pyrolytic process of coal and gasification In two recirculating fluidized beds, carry out respectively the pyrolysis of coal and gasification decoupling zero and respectively control. 2. the present invention adopts With preposition bubbling fluidized bed, make the coal partial gasification, coal grading is transformed, improved the utilization ratio of coal; 3. the present invention proposes the concept of semicoke bubbling fluidized bed surge tank, reduced system's operation easier.
Claims (3)
1. double lift pipe circulation fluidized bed coal gasifying device, the pyrolytic process of coal and the decoupling zero of gasification have been realized, mainly comprise the pyrolysis fluidized-bed, the ciculation fluidized burning bed of pyrolysis, the gasification circulating fluidized bed, feed hopper, feeding screw, blower fan, cyclonic separator and pneumavalve, it is characterized in that feed hopper links to each other with feeding screw, feeding screw links to each other with the pyrolysis fluidized-bed, the pyrolysis fluidized-bed links to each other by the ciculation fluidized burning bed of pneumavalve and pyrolysis, the ciculation fluidized burning bed of pyrolysis is coupled by the cyclonic separator import, this cyclonic separator links to each other with bubbling fluidized bed by its bottom solid outlet, bubbling fluidized bed has a branch road to link to each other with pyrolysis fluidized bed combustion bed by pneumavalve, another branch road links to each other with the gasification circulating fluidized bed by pneumavalve, the gasification circulating fluidized bed is connected with the cyclonic separator import, and this cyclonic separator bottom solid outlet links to each other with bubbling fluidized bed.
2. according to the described double lift pipe circulation fluidized bed coal gasifying device of claim 1, it is characterized in that the bottom of the ciculation fluidized burning bed of pyrolysis connects blower fan.
3. according to the described double lift pipe circulation fluidized bed coal gasifying device of claim 1, the top that it is characterized in that said pyrolysis fluidized-bed, the ciculation fluidized burning bed of pyrolysis, bubbling fluidized bed and gasification circulating fluidized bed is connected to a cyclonic separator respectively, above-mentioned pyrolysis fluidized-bed, the ciculation fluidized burning bed of pyrolysis, bubbling fluidized bed and gasification circulating fluidized bed are connected with the cyclonic separator import respectively, are used to separate the granule materials of elutriation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100449257A CN100445351C (en) | 2005-10-18 | 2005-10-18 | Double lift pipe circulation fluidized bed coal gasifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100449257A CN100445351C (en) | 2005-10-18 | 2005-10-18 | Double lift pipe circulation fluidized bed coal gasifying device |
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| Publication Number | Publication Date |
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| CN1749368A CN1749368A (en) | 2006-03-22 |
| CN100445351C true CN100445351C (en) | 2008-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100449257A Expired - Fee Related CN100445351C (en) | 2005-10-18 | 2005-10-18 | Double lift pipe circulation fluidized bed coal gasifying device |
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| CN102876342A (en) * | 2012-10-24 | 2013-01-16 | 金先奎 | Method for producing coal tar through coal dry distillation and producing coal gas through coal semi-coke gasification |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397656A (en) * | 1982-02-01 | 1983-08-09 | Mobil Oil Corporation | Process for the combined coking and gasification of coal |
| CN1056117A (en) * | 1991-06-21 | 1991-11-13 | 清华大学 | Circulation bed coal gas-steam co-producing technology and device |
| CN2319410Y (en) * | 1997-09-26 | 1999-05-19 | 清华大学 | Cooperative prodn. Unit for two-stage gasifying fluidized bed coke loaded hot gas and steam |
| WO2000006671A1 (en) * | 1998-07-27 | 2000-02-10 | Stichting Energieonderzoek Centrum Nederland | Method and device for forming synthesis gas from biomass and residual materials |
| CN1358220A (en) * | 1999-06-30 | 2002-07-10 | 赫尔霍夫环保技术股份有限公司 | Method and device for pyrolyzing and gasifying organic substances or substance mixtures |
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2005
- 2005-10-18 CN CNB2005100449257A patent/CN100445351C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397656A (en) * | 1982-02-01 | 1983-08-09 | Mobil Oil Corporation | Process for the combined coking and gasification of coal |
| CN1056117A (en) * | 1991-06-21 | 1991-11-13 | 清华大学 | Circulation bed coal gas-steam co-producing technology and device |
| CN2319410Y (en) * | 1997-09-26 | 1999-05-19 | 清华大学 | Cooperative prodn. Unit for two-stage gasifying fluidized bed coke loaded hot gas and steam |
| WO2000006671A1 (en) * | 1998-07-27 | 2000-02-10 | Stichting Energieonderzoek Centrum Nederland | Method and device for forming synthesis gas from biomass and residual materials |
| CN1358220A (en) * | 1999-06-30 | 2002-07-10 | 赫尔霍夫环保技术股份有限公司 | Method and device for pyrolyzing and gasifying organic substances or substance mixtures |
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| CN1749368A (en) | 2006-03-22 |
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