CN1900234A - Chilling device and process for dry coal powder pressure gasifying - Google Patents
Chilling device and process for dry coal powder pressure gasifying Download PDFInfo
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- CN1900234A CN1900234A CNA2006100431953A CN200610043195A CN1900234A CN 1900234 A CN1900234 A CN 1900234A CN A2006100431953 A CNA2006100431953 A CN A2006100431953A CN 200610043195 A CN200610043195 A CN 200610043195A CN 1900234 A CN1900234 A CN 1900234A
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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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Abstract
The coal powder pressurized gasifying and chilling apparatus includes five parts for coal powder pressurizing gasification, water spraying chilling, chilling in a chilling chamber, clinker exhaustion and grey water treatment separately. The coal powder pressurized gasifying and chilling process includes the pressurized gasifying of coal powder n the pressurized gasifying furnace through reaction with O2 and water vapor to produce crude gas with CO and H2 as main components, chilling of the crude gas in the sparger, further chilling in the chilling chamber, and final washing in the washing tower. The produced synthesized gas may be used in producing methanol, synthetic ammonia, hydrogen, synthetic oil and other chemical product and energy source product.
Description
Technical field
The present invention relates to a kind of gasification chilling device and chilling technology, particularly a kind of dry coal powder pressure gasifying chilling device and chilling technology.
Background technology
Coal Gasification Technology is the key of clean coal technology as the frontier technology of coal deep processing, conversion, is " tap " technology, and Application Areas is very extensive.Have 180 years development histories, particularly large vol IGCC power station demonstration during the nearly last ten years proves with commercialized running: compare with fixed bed, fluidized-bed, air flow bed has coal and granularity adaptability and better technical feature preferably, is coal-based large vol, high effect cleaning, reliable combustion gas and the one preferred technique of synthesis gas preparation device.
The common feature of modern entrained flow gasification is pressurization (3.0MPa～6.5MPa), high temperature (1300～1700 ℃), a fine granularity, but handle at coal, the charging form with mode, realize mixing, countermeasure is totally different on the technical units such as furnace shell liner, deslagging, waste heat recovery, thereby the technology school of formation different-style.Comprising two kinds of technology schools that differ from one another, a kind of is to be the coal water slurry gasification technology of representative with U.S. Texaco technology; The dry coal powder gasification technology that another kind is is representative with Dutch Shell technology.
Coal water slurry gasification technology commercialization market occupancy volume worldwide is big, technology maturation, it because of coal slurry preparation, metering, carry, control is simple, safe and reliable, the working pressure height can reach the low technical characterstic that waits of 6.5MPa and investment and be used widely.
And the dry coal powder gasification technology is compared with the coal water slurry gasification technology, and cold gas efficiency is high 6～8 percentage points, descends significantly than coal consumption and oxygen consumption, and coal adaptability is wider, and the foundation of investment of gasification system is suitable.External research data and operation actual achievement show that dry coal powder pressurization oxygenation entrained flow bed gasification technology is a kind of advanced person's a Coal Gasification Technology, is representing a main flow direction of Coal Gasification Technology development.
Technology in the Coal Gasification Technology after the gasification has chilling technology and two kinds of useless pot technologies usually; In chilling technology, the heat of gas is absorbed by water vapor, and lime-ash mixes in water, includes a large amount of water vapour in the gas phase, can satisfy the needs of conversion process.Useless pot technology can be made up of one or more levels waste heat boiler, washing and dry-cleaning dedusting.The heat of gas produces high and medium voltage steam, and lime-ash mixes in water, includes a spot of water vapour in the gas phase.
In the Texaco technology of present domestic operation, coal gas and melt cinder are coflow, and promptly coal gas and melt cinder all flow downward, and have only chilling technology a kind of.Similarly, in the Shell technology of introducing, coal gas and melt cinder are reversed flow recently, and promptly coal gas makes progress, and melt cinder flows downward, and have only useless pot technology a kind of.And in the GSP technology of introducing recently, coal gas and melt cinder are coflow, and promptly coal gas and melt cinder all flow downward, and employing is chilling technology.
In fact, the chilling technology that the Texaco technology adopts is owing to produce the needs of variant production.The Texaco technology of present domestic gas maked coal is mainly used in synthetic ammonia.CO in the water-gas of gasification back will all be converted into CO with the water vapour reaction
2, this just needs a large amount of water vapour, according to the requirement of transformation catalyst, will reach certain steam-to-gas ratio (about 2.0) usually.Chilling technology had both removed the dirt slag, had played the effect of humidification again, made steam-to-gas ratio in the gas of gasification back satisfy the needs of conversion process.Therefore, chilling process is at hydrogen manufacturing and Ammonia Production.
The synthetic H that needs of methyl alcohol
2O/CO is about 2.0, and chilling technology is also proper.
When being used for town gas and generating, do not need a large amount of water vapour in the gas, therefore, useless pot technology is suitable for town gas and generating.The reason that Shell technology and useless pot technology thereof are mainly used in generating abroad also just is this.
In China, surplus the commercialization of coal and the socialization existing so far 100 year, but form can with the autonomous property right Coal Gasification Technology of the commercialization that contends with in the world.Play Xibei Chemical Inst research and development coal water slurry gasification technology the seventies in 20th century and built pilot plant, provide rich experience for 4 tame factories after this introduce Texaco coal water slurry gasification technology.
The nineties later stage, along with applying of clean coal power generation technology such as IGCC, under the subsidy of State Power Corporation, Xi'an hot working research institute has set up domestic first cover dry coal powder pressure gasifying characteristic test apparatus and dry coal powder pressurization concentrated phase feed device, it is 700kg that day is handled the coal amount, vapor pressure is 2.0～3.0MPa, and has carried out the research of dry coal powder gasification characteristic and dry coal powder concentrated phase pressurization feeder system.
Tenth Five-Year Plan Period, Yankuang Group Ltd., East China University of Science bore " 863 " problem---novel water-coal-slurry gasification technology, built the commercial demonstration unit (4.0MPa) of the opposed coal water slurry gasification technology of four nozzles of day handling the 1000t coal.
Tenth Five-Year Plan Period, Xi'an hot working research institute is responsible for having finished the research of national high-tech research evolutionary operation(EVOP) (863 Program) problem " dry coal powder pressure gasifying technology " pilot plant test, invented the double-section dry coal powder pressure gasification process of band water wall and gas cooler, having built up scale is the pilot plant of 36t/d, vapor pressure is 3.4MPa, carry out tens kinds of coal gasification tests, and passed through national acceptance.
Summary of the invention
The object of the present invention is to provide and contain more water vapour in a kind of raw gas, can directly send into transformation system and do not need to add again steam, cheap, dry coal powder pressure gasifying chilling device and chilling technology that system total efficiency is high.
For achieving the above object, chilling device of the present invention comprises vapourizing furnace and the lock slag ladle that is connected with vapourizing furnace by pipeline, be characterized in, be symmetrically arranged with a group or more nozzle in the bottom of vapourizing furnace, the pneumatic outlet of vapourizing furnace is connected with the shock chamber by pipeline, the pneumatic outlet of shock chamber is connected with washing tower by pipeline, the lower end outlet of shock chamber is connected with grey water pot by pipeline, also offer the water inlet that is connected with middle pressure feedwater on the sidewall of shock chamber, grey water pot is connected with grey water treatment system by pipeline with the outlet of washing tower; The inside of vapourizing furnace is provided with water wall, and also is provided with the spray thrower that is connected with middle pressure feedwater in the upper end of vapourizing furnace.
Chilling technology of the present invention is: dry coal powder and nitrogen or CO
2Enter in the burner hearth from the symmetric nozzle in vapourizing furnace bottom, generate with CO and H with the oxygen of sending into from nozzle or oxygen enrichment and steam reaction
2Be main raw gas, raw gas flows in vapourizing furnace from bottom to top, enters the shock chamber after the spray thrower cooling through vapourizing furnace top and carries out Quench, gets final product after entering the washing tower washing, purifying then.
The present invention has adopted the dry coal powder pressure gasifying chilling technology of coal gas upstriker, be that coal gas and melt cinder are reversed flow, coal gas upwards flows, the dry coal powder pressure gasifying chilling technology that melt cinder flows downward, the raw gas that this explained hereafter is come out contains more water vapour, can directly send into transformation system and does not need to add steam again, and is cheap, the system total efficiency height is Coal Chemical Industry (synthetic ammonia, methyl alcohol, system H
2, synthetic oil) optimal selection of industry.
Description of drawings
Accompanying drawing is an one-piece construction synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to accompanying drawing 1, the lock slag ladle 3 that the present invention includes vapourizing furnace 1 and be connected with vapourizing furnace 1 by pipeline, be symmetrically arranged with a group or more nozzle 8 in the bottom of vapourizing furnace 1, the inside of vapourizing furnace 1 is provided with water wall 2, and also be provided with the spray thrower 7 that is connected with middle pressure feedwater in the upper end of vapourizing furnace, the pneumatic outlet of vapourizing furnace 1 is connected with shock chamber 4 by pipeline, the pneumatic outlet of shock chamber 4 is connected with washing tower 6 by pipeline, the lower end outlet of shock chamber 4 is connected with grey water pot 5 by pipeline, also offer the water inlet 9 that is connected with middle pressure feedwater on the sidewall of shock chamber 4, grey water pot 5 is connected with grey water treatment system by pipeline with the outlet of washing tower 6.
Process implementing step of the present invention:
Initial period, dry coal powder pass through positive delivery to vapourizing furnace 1,1450 ℃～1600 ℃ of vapourizing furnace 1 service temperatures, and under the condition of working pressure 4.0MPa, dry coal powder and nitrogen or CO
2Enter in the burner hearth from the symmetric nozzle 8 in vapourizing furnace 1 bottom, generate with CO and H with oxygen of sending into from nozzle 8 (or oxygen enrichment) and steam reaction
2It is main raw gas, the temperature of the raw gas that produces is about 1500 ℃, raw gas flows in vapourizing furnace from bottom to top, after spray thrower 7 coolings through vapourizing furnace 1 top, gas temperature is reduced to about 900 ℃, and by the spray of setting-out in the valve D1 control, this is Quench first time of the present invention in the process, be cured in this liquid slag, the lime-ash discharging is that the molten state lime-ash that vapourizing furnace 1 produces is discharged by the hearth deslagging system through lock ash can 3; Enter shock chamber 4 and carry out Quench through spraying for the first time raw gas after the Quench, make raw gas Quench below raw gas is directly fed shock chamber's 4 liquid levels this moment, raw gas is by shock chamber's 4 top outlet conduits after the Quench, enter washing tower 6 washing, purifyings by valve D6 on-off control, when shock chamber's 4 bucks reach quantity discharged, the buck that produces is discharged by the bottom through grey water pot 5 and is entered follow-up ash water system processing, in this process, need first valve-off D9, D10, D11 and D12, open the additional enough middle setting-out of valve D6 ash-feeding water jar and close D6 then, Open valve D9 and D10, allow shock chamber's 4 interior bucks precipitate and enter grey water pot 5 through after a while, close D9 then, D10, opening valve D11 and D12 enters grey water treatment system with bucks in the grey water pot 5 and D11 and D12 is closed again, when shock chamber's 4 liquid levels are lower than standard, open valve D7 and give additional in right amount middle setting-out in the shock chamber 4, discharge the continuous blow-down that buck is operated buck in the time of can realizing moving above repeating in the operational process; The raw gas temperature is reduced to about 300 ℃ approximately in shock chamber 4, enter washing tower 6 washing, purifyings then, the buck that produces is incorporated grey water treatment system into by valve D13 control and is handled, the synthetic gas that purifies the back generation is used to produce methyl alcohol, synthetic ammonia etc., because the present invention does not need circulation cooling air pump and gas cooler, investment and wasted work have therefore been reduced.
The present invention has proposed the dry coal powder pressure gasifying chilling technology of coal gas upstriker first, the raw gas that this explained hereafter is come out contains more water vapour, can directly send into transformation system and does not need to add steam again, and is cheap, the system total efficiency height is Coal Chemical Industry (synthetic ammonia, methyl alcohol, system H
2, synthetic oil) optimal selection of industry.Carry out spray desuperheating in the stove, make very easily Quench curing of liquid slag, prevent the follow-up system coking; Raw gas carries out Quench and washing in shock chamber 4, do not need equipment such as circulation cooling air pump and gas cooler, has reduced investment and wasted work.
Claims (3)
1, a kind of dry coal powder pressure gasifying chilling device, comprise vapourizing furnace (1) and the lock slag ladle (3) that is connected with vapourizing furnace (1) by pipeline, it is characterized in that: the nozzle (8) that is symmetrically arranged with a group or more in the bottom of vapourizing furnace (1), the pneumatic outlet of vapourizing furnace (1) is connected with shock chamber (4) by pipeline, the pneumatic outlet of shock chamber (4) is connected with washing tower (6) by pipeline, the lower end outlet of shock chamber (4) is connected with grey water pot (5) by pipeline, also offer the water inlet (9) that is connected with middle pressure feedwater on the sidewall of shock chamber (4), grey water pot (5) is connected with grey water treatment system by pipeline with the outlet of washing tower (6).
2, dry coal powder pressure gasifying chilling device according to claim 1 is characterized in that: the inside of said vapourizing furnace (1) is provided with water wall (2), and also is provided with the spray thrower (7) that is connected with middle pressure feedwater in the upper end of vapourizing furnace.
3, a kind of dry coal powder pressure gasifying chilling technology, it is characterized in that: dry coal powder and nitrogen or CO2 enter in the burner hearth from vapourizing furnace (1) the symmetric nozzle in bottom (8), generate raw gas with the oxygen of sending into from nozzle (8) or oxygen enrichment and steam reaction based on CO and H2, raw gas flows in vapourizing furnace from bottom to top, enter shock chamber (4) after spray thrower (7) cooling through vapourizing furnace (1) top and carry out Quench, get final product after entering washing tower (6) washing, purifying then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100431953A CN1900234A (en) | 2006-07-25 | 2006-07-25 | Chilling device and process for dry coal powder pressure gasifying |
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|---|---|---|---|
| CNA2006100431953A CN1900234A (en) | 2006-07-25 | 2006-07-25 | Chilling device and process for dry coal powder pressure gasifying |
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| CN1900234A true CN1900234A (en) | 2007-01-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298569B (en) * | 2008-06-26 | 2011-05-11 | 华东理工大学 | Gasification method of shock chilling type pulp or powder carbonaceous material |
| CN101285005B (en) * | 2008-05-30 | 2011-07-27 | 中国五环工程有限公司 | Chill device of water/gas mixed full-chilled dry powder fuel gasification process |
| CN101333463B (en) * | 2008-08-04 | 2011-08-17 | 上海发电设备成套设计研究院 | Oxygen supplying and hydrogen making process from iron base oxygen carrier of three-linked transport bed |
| CN101285006B (en) * | 2008-05-30 | 2011-10-05 | 中国五环工程有限公司 | Gasification process of water/gas mixed partial-chilled dry powder fuel and device |
| CN102703129A (en) * | 2012-06-04 | 2012-10-03 | 上海锅炉厂有限公司 | Staged-pressurization gasification reaction device for dry pulverized coal and gasification method thereof |
| CN104531228A (en) * | 2014-12-18 | 2015-04-22 | 广东正鹏生物质能源科技有限公司 | Device and method for implementing efficient purification of biomass gas in furnace |
| CN107151567A (en) * | 2017-06-28 | 2017-09-12 | 北京金泰瑞和工程科技有限公司 | Coal water slurry gasification system and its technique |
-
2006
- 2006-07-25 CN CNA2006100431953A patent/CN1900234A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285005B (en) * | 2008-05-30 | 2011-07-27 | 中国五环工程有限公司 | Chill device of water/gas mixed full-chilled dry powder fuel gasification process |
| CN101285006B (en) * | 2008-05-30 | 2011-10-05 | 中国五环工程有限公司 | Gasification process of water/gas mixed partial-chilled dry powder fuel and device |
| CN101298569B (en) * | 2008-06-26 | 2011-05-11 | 华东理工大学 | Gasification method of shock chilling type pulp or powder carbonaceous material |
| CN101333463B (en) * | 2008-08-04 | 2011-08-17 | 上海发电设备成套设计研究院 | Oxygen supplying and hydrogen making process from iron base oxygen carrier of three-linked transport bed |
| CN102703129A (en) * | 2012-06-04 | 2012-10-03 | 上海锅炉厂有限公司 | Staged-pressurization gasification reaction device for dry pulverized coal and gasification method thereof |
| CN104531228A (en) * | 2014-12-18 | 2015-04-22 | 广东正鹏生物质能源科技有限公司 | Device and method for implementing efficient purification of biomass gas in furnace |
| CN104531228B (en) * | 2014-12-18 | 2017-06-20 | 广东正鹏生物质能源科技有限公司 | The device and method of high-efficient purification in a kind of achievable biomass gas stove |
| CN107151567A (en) * | 2017-06-28 | 2017-09-12 | 北京金泰瑞和工程科技有限公司 | Coal water slurry gasification system and its technique |
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