CN102504877A - Energy-saving and environment-friendly type graded gasification process of pulverized coal - Google Patents
Energy-saving and environment-friendly type graded gasification process of pulverized coal Download PDFInfo
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- CN102504877A CN102504877A CN2011103463571A CN201110346357A CN102504877A CN 102504877 A CN102504877 A CN 102504877A CN 2011103463571 A CN2011103463571 A CN 2011103463571A CN 201110346357 A CN201110346357 A CN 201110346357A CN 102504877 A CN102504877 A CN 102504877A
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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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Abstract
The invention provides an energy-saving and environment-friendly type graded gasification process of pulverized coal, belonging to the field of a coal chemical industry. The process refers to the energy-saving and environment-friendly type graded gasification process which utilizes a fluidized bed or a rough coal gas system at the outlet of a circulating fluidized bed to be serially connected with a high-temperature gasification or melted slag gasification furnace in a pulverized coal gasification device, thereby solving the technical problems that the content of carbon dioxide and organic matters in coal gas generated by the fluidized bed and the circulating fluidized bed through gasification is high, the carbon content of fly ash and furnace slag is high, the effective gas content and the efficiency of cool coal gas are low, the difficulty of purifying the coal gas is great and the like, reducing the energy consumption and the operation cost of a coal gasification system, and improving the quality of the rough coal gas and the environment-friendly performance of the gasification system. The energy-saving and environment-friendly type graded gasification process of the pulverized coal can be applied to various pulverized coal gasification processes.
Description
Technical field
The present invention relates to coal chemical technology.
Background technology
In coal chemical technology; Quantity-produced fluidized-bed both domestic and external or fluidized bed pulverized coal gasification system; Owing to receive the ash fusion point of feed coal, the activity of coal and the restriction of efficiency separator; Make that the gasification system service temperature is low; Carbonic acid gas, flying dust high with organic content and boiler slag carbon content is high, effectively gas content is low in the raw gas of producing, technical barrier such as cause that coal consumption is high, the raw gas purifying difficulty is big and environmental issue is serious has become one of important factor that restriction fluidized-bed or fluidized bed pulverized coal gasification develop.
Summary of the invention
The present invention is meant and in the coal gasification system, invents the energy saving and environment friendly classification gasifying process that adopts fluidized-bed or high-temperature gasification of circulating fluidized bed series connection or slag gasification furnace.It is low to be primarily aimed at the gasification temperature that exists in coal chemical technology fluidized-bed or the fluidized bed pulverized coal gasification system; Carbonic acid gas, flying dust high and technical barrier such as high, the effective gas content of boiler slag carbon content is low, coal consumption is high, the raw gas purifying difficulty is big and environmental issue is serious in the raw gas of producing with organic content; The fine coal gasification process of fluidized-bed gasification furnace or high-temperature gasification stove of fluidized bed pulverized coal gasification stove series connection or slag gasification furnace is adopted in invention; Usual manner advances coal; Oxygen that fine coal gets in fluidized-bed gasification furnace or circle fluidized-bed gasification furnace and through the vaporized chemical nozzle or the vaporized chemical that contains oxygen carry out elementary gasification together; The raw gas that the elementary gasification of fluidized-bed or circulating fluidized bed produces and the coal dust or other carbon raw materials that before entering high-temperature gasification stove inlet, add get into the high-temperature gasification stove together; Oxygen that raw gas, coal dust or other carbon raw materials and the vaporized chemical nozzle through the high-temperature gasification stove add in the high-temperature gasification stove or the vaporized chemical that contains oxygen further carry out high-temperature gasification or high-temperature slag gasification reaction, and coal gas of high temperature, flying dust or the molten slag that comes out in the high-temperature gasification stove leaves vapourizing furnace after by cooled coal gas or cold shocking water cold shock cooling.Because gasification temperature is high in the high-temperature gasification stove, so contain organism in the coal gas hardly, the carbon residue in the coal gas in carbonic acid gas, flying dust and the slag significantly reduces, and the effective gas content in the coal gas, the utilization ratio of coal significantly improve.Thereby solved in the coal gas that fluidized-bed or fluidized bed pulverized coal gasification produce carbonic acid gas and organic content is high, flying dust and boiler slag carbon content is high, effectively gas content and technical barrier such as cold gas efficiency is low, the gas purification difficulty is big, reduced gasification system energy consumption and running cost, improved the quality of raw gas and the environmental-protecting performance of gasification system.
Present technique can be applicable to various coal gasification processes.
Description of drawings
Fig. 1 is a principle schematic of the present invention.
Embodiment
Get into fluidized-bed or circle fluidized-bed gasification furnace 3 through broken fine coal from coal conveyor 4; Vaporized chemical oxygen or the vaporized chemical that contains oxygen are delivered to fluidized-bed or tentatively gasify in circle fluidized-bed gasification furnace 3 inside through vaporized chemical nozzle 5; Coal dust or other carbon raw materials that raw gas that comes out in fluidized-bed gasification furnace or the circle fluidized-bed gasification furnace and the fine coal feeding device 2 through the high-temperature gasification stokehold add get into high-temperature gasification stove 1 through the top of high-temperature gasification stove or from other positions together; Carry out high-temperature gasification or high-temperature slag 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 naturally through the bottom of high-temperature gasification stove 1, is discharged after quench gas or the cold shocking water cooled and solidified.Reacted coal gas of high temperature and flying dust are after the top of high-temperature gasification stove 1 or other positions are by the low temperature coal gas of quench gas inlet 7 or cold shocking water cold shock cooling, and the outlet pipe 6 through high-temperature gasification stove 1 leaves vapourizing furnace.
Claims (1)
1. energy saving and environment friendly fine coal classification gasifying process; It is characterized in that; In gasifying powder coal device, adopt at least one fluidized-bed or fluidized bed pulverized coal gasification stove; At least one high-temperature gasification stove of series connection or slag gasification furnace in the raw gas system of coming out in fluidized-bed or the circle fluidized-bed gasification furnace; And any position before high-temperature gasification stove or slag gasification furnace replenishes certain coal dust or other carbon raw materials; The raw gas that comes out in fluidized-bed or the circle fluidized-bed gasification furnace carries out high-temperature gasification or high-temperature slag gasification reaction with the coal dust that before high-temperature gasification stove or slag gasification furnace, adds or other carbon raw materials and oxygen or the vaporized chemical that contains oxygen in high-temperature gasification stove or slag gasification furnace, the coal gas of high temperature that the reaction back produces and slag leave vapourizing furnace after cooling off through quench gas or cold shocking water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103463571A CN102504877A (en) | 2011-11-07 | 2011-11-07 | Energy-saving and environment-friendly type graded gasification process of pulverized coal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103463571A CN102504877A (en) | 2011-11-07 | 2011-11-07 | Energy-saving and environment-friendly type graded gasification process of pulverized coal |
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| CN102504877A true CN102504877A (en) | 2012-06-20 |
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| CN2011103463571A Pending CN102504877A (en) | 2011-11-07 | 2011-11-07 | Energy-saving and environment-friendly type graded gasification process of pulverized coal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923704A (en) * | 2014-04-16 | 2014-07-16 | 安徽科达洁能股份有限公司 | Coal gas generation device |
| CN104893760A (en) * | 2015-06-13 | 2015-09-09 | 辽宁恩德工程建设有限公司 | Low-high temperature combined normal-pressure powder coal gasification furnace and gasification technological method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451719A (en) * | 2003-05-06 | 2003-10-29 | 太原理工大学 | Method and device for gasifying coal |
| CN101440310A (en) * | 2007-11-23 | 2009-05-27 | 山东科技大学 | Process for fluidized bed classification gasification of dust coal |
| CN101962576A (en) * | 2010-10-14 | 2011-02-02 | 邰学林 | Composite pulverized coal gasifying technology |
-
2011
- 2011-11-07 CN CN2011103463571A patent/CN102504877A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451719A (en) * | 2003-05-06 | 2003-10-29 | 太原理工大学 | Method and device for gasifying coal |
| CN101440310A (en) * | 2007-11-23 | 2009-05-27 | 山东科技大学 | Process for fluidized bed classification gasification of dust coal |
| CN101962576A (en) * | 2010-10-14 | 2011-02-02 | 邰学林 | Composite pulverized coal gasifying technology |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923704A (en) * | 2014-04-16 | 2014-07-16 | 安徽科达洁能股份有限公司 | Coal gas generation device |
| CN104893760A (en) * | 2015-06-13 | 2015-09-09 | 辽宁恩德工程建设有限公司 | Low-high temperature combined normal-pressure powder coal gasification furnace and gasification technological method |
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Application publication date: 20120620 |