CN102660328A - Energy-saving environmentally-friendly secondary gasification process for gas pulverized coal - Google Patents
Energy-saving environmentally-friendly secondary gasification process for gas pulverized coal Download PDFInfo
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- CN102660328A CN102660328A CN2012101223597A CN201210122359A CN102660328A CN 102660328 A CN102660328 A CN 102660328A CN 2012101223597 A CN2012101223597 A CN 2012101223597A CN 201210122359 A CN201210122359 A CN 201210122359A CN 102660328 A CN102660328 A CN 102660328A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The invention discloses an energy-saving environmentally-friendly secondary gasification process for gas pulverized coal, which belongs to the field of coal chemical industry. Gas generated by low-temperature coal gasification is secondly gasified by a high-temperature slag entrained flow bed gasification furnace in various low-temperature coal gasification systems of which the gasification temperature is lower than 1300DEG C except fluidized bed gasification furnaces, such as Lurgi furnace gasification, coking, and circulating fluidized bed coal gasification; the waste water problems that gas generated in the low-temperature coal gasification contains higher organic matters, such as carbon dioxide, tar, and phenols, and a great quantity of organic matters, such as phenols which are difficult to handle is generated in the gas purification coal gasification process are solved; energy consumption is lowered; and meanwhile, the capacity of the device is improved. The energy-saving environmentally-friendly secondary gasification process for gas pulverized coal can be used for the technical modification of the environment protection and the yield improvement energy saving of various low-temperature coal gasification devices and the gasification process of various coals.
Description
Technical field
The present invention relates to coal chemical technology.
Background technology
In coal chemical technology; Various gasification temperatures such as lurgi gasifier gasification both domestic and external, coking, circulation fluidized bed coal gasifying are lower than 1300 ℃ low temperature coal gasization or coke(oven)gas production equipment, and are because gasification temperature is low, high to ingredient requirement; Gasification efficiency is low; The coal gas gaseous mass of producing is poor, contains organism such as higher carbonic acid gas and tar in the coal gas, in the gas purification process, produces a large amount of organic waste water such as phenols that contain.The method that does not also have at present a kind of cost-effective Phenol-Containing Wastewater Treatment, the environmental issue that the low temperature gasification process produces have become these low temperature coal gas systems of restriction in one of important factor of Coal Chemical Industry sector application.
Summary of the invention
The present invention is meant at gasification temperature and is lower than the technology that adopts coal gas that at least one high-temperature slag airflow bed gasification furnace produce low temperature coal gasization or coke(oven)gas to carry out second gasification in the device of 1300 ℃ of low temperature coal gasization or coke(oven)gas production chemical product; Both solved the problem of environmental pollution that low temperature coal gasization produced; Reduce energy consumption again, improved the coal gas production capacity of device simultaneously.Be primarily aimed at the coal chemical technology gasification temperature and be lower than that 1300 ℃ low temperature coal gas makeup puts that the gasification efficient that is produced is low, contain large amount of organic in the coal gas and produce the reluctant difficult problems of organic waste water such as containing phenols at scavenging process; Invention is employed in the coal gas or the coke(oven)gas that adopt the high-temperature slag airflow bed gasification furnace that low temperature coal gasization is produced in the device of low temperature coal gasization or coke(oven)gas production chemical product and carries out second gasification, thereby solves the environmental issue that low temperature gasification brought.Usual manner advances coal; Feed coal is being produced coke(oven)gas through getting in low temperature coal gas furnace gasization or the coke oven after the pre-treatment; Raw gas of producing or coke(oven)gas are adding coal dust or coke powder through after reclaiming coal tar; Or directly in raw gas, add the vaporized chemical that gets into the oxygen of slag airflow bed gasification furnace and adding behind coal dust or the coke powder or contain oxygen and carry out the secondary high-temperature slag and gasify; Liquid slag flows into slag handling system and discharges from the vapourizing furnace bottom, coal gas of high temperature leaves vapourizing furnace after by quench gas or cold shocking water cold shock cooling.Thoroughly solved in the gas purification process that low temperature coal gasization produces and produced organic wastewater problems such as containing phenols, reduced energy consumption simultaneously, improved the gas quality and the throughput of coal gasification apparatus.
This technology can be applicable to the environmental protection of various low temperature coal gas system and the technological transformation of energy-saving and production-increase, also can be used for coal gasification course.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Embodiment
Get into low temperature gasification stove 2 through pretreated feed coal or coal dust from coal feeder 3; Vaporized chemical oxygen and water vapour or the vaporized chemical that contains oxygen get into low temperature gasification stoves 2 through gasification agent inlet nozzle 4; The raw gas of producing that tentatively gasifies in low temperature gasification stove 2 inside reclaims or directly through coal dust adding apparatus 1 adds a certain amount of coal dust or coke powder in coal gas after, gets into slag airflow bed gasification furnace 7 through tar; Carry out the high-temperature gasification reaction with oxygen that adds through vaporized chemical nozzle 8 or the vaporized chemical that contains oxygen; Reacted molten slag flows into dreg removing system 9 through the bottom of slag airflow bed gasification furnace 7, is solidified the back by water cooling and discharges.Reacted high-temperature gas is after slag air flow bed outlet chiller 6 is by cooled coal gas or the cooling of water Quench, and the outlet pipe 5 through slag airflow bed gasification furnace 7 leaves airflow bed gasification furnace.
Claims (1)
1. coal gas fine coal energy-conserving and environment-protective second gasification technology; It is characterized in that; Be lower than in 1300 ℃ of coal gasification apparatus or adopt at least one slag airflow bed gasification furnace in the device of coke(oven)gas production chemical product at a gasification temperature except that fluidized-bed gasification furnace, and get into the slag airflow bed gasification furnace after in the coke(oven)gas of raw gas that the low temperature coal gas stove is produced or the production of coke(oven)gas production equipment, adding a certain amount of coal dust or coke powder and the oxygen that adds at slag airflow bed gasification furnace inlet or the vaporized chemical that contains oxygen carry out the high-temperature slag gasification together.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101223597A CN102660328A (en) | 2012-04-25 | 2012-04-25 | Energy-saving environmentally-friendly secondary gasification process for gas pulverized coal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101223597A CN102660328A (en) | 2012-04-25 | 2012-04-25 | Energy-saving environmentally-friendly secondary gasification process for gas pulverized coal |
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| CN102660328A true CN102660328A (en) | 2012-09-12 |
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| CN2012101223597A Pending CN102660328A (en) | 2012-04-25 | 2012-04-25 | Energy-saving environmentally-friendly secondary gasification process for gas pulverized coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105838451A (en) * | 2016-04-26 | 2016-08-10 | 华陆工程科技有限责任公司 | Method for gasifying pulverized coal step by step in double beds connected in series |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3130031A1 (en) * | 1981-07-30 | 1982-04-08 | Davy McKee AG, 6000 Frankfurt | METHOD FOR GASIFYING COAL |
| CN2659895Y (en) * | 2003-09-19 | 2004-12-01 | 顾大地 | Improved noncinder-cinder gasification furnace |
| CN201184590Y (en) * | 2008-03-26 | 2009-01-21 | 王兴道 | Combined type powder coal gasification combustion apparatus |
| CN101962576A (en) * | 2010-10-14 | 2011-02-02 | 邰学林 | Composite pulverized coal gasifying technology |
-
2012
- 2012-04-25 CN CN2012101223597A patent/CN102660328A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3130031A1 (en) * | 1981-07-30 | 1982-04-08 | Davy McKee AG, 6000 Frankfurt | METHOD FOR GASIFYING COAL |
| CN2659895Y (en) * | 2003-09-19 | 2004-12-01 | 顾大地 | Improved noncinder-cinder gasification furnace |
| CN201184590Y (en) * | 2008-03-26 | 2009-01-21 | 王兴道 | Combined type powder coal gasification combustion apparatus |
| CN101962576A (en) * | 2010-10-14 | 2011-02-02 | 邰学林 | Composite pulverized coal gasifying technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105838451A (en) * | 2016-04-26 | 2016-08-10 | 华陆工程科技有限责任公司 | Method for gasifying pulverized coal step by step in double beds connected in series |
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Application publication date: 20120912 |