Safety sealing and airflow conveying method for fine coal gasification process
A technology of air conveying and coal gasification, which is applied in the gasification of granular/powder fuel, petroleum industry, and the manufacture of combustible gas, etc. It can solve the problems of increasing consumption index, increasing cost, increasing investment in equipment, etc., so as to increase investment in equipment. , Increase the cost, the effect of high effective gas composition
Active Publication Date: 2005-11-30
成都市通用工程技术有限责任公司
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[0004] The purpose of the method of the present invention is to use pulverized coal gasification to produce synthesis gas without nitrogen or to produce hydrogen for hydrogenation reaction, to solve the problem of increasing various consumption indicators caused by using nitrogen for safe sealing and transporting pulverized coal, and to increase equipment investment. The problem of increasing costs
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[0024] refer to figure 1 , the pulverized coal sent by the screw conveyor enters the pulverized coal storage bin 3 through the pipeline 1, and passes into the pulverized coal storage bin 3 through the pipeline 2. The carbon dioxide gas (or the flue gas of low oxygen content) between, to maintain its slightly positive pressure operation, and remove part of waste gas through pipeline 24 regularly.
[0025] Then, the pulverized coal enters into two alternately switched pulverized coal lockers 7a and 7b through the pipelines 4 and 5 respectively, and the pulverized coal is controlled to enter the pulverized coal feeding bin 12 through the pipeline 9 or 10 intermittently through the pipeline 11 . The hydrocarbon gas with a temperature ranging from normal temperature to less than 350°C and a pressure of 0.1-12 MPa is alternately filled into the pulverized coal lock hopper through pipeline 6 or pipeline 8, and then enters the pulverized coal feed bin to maintain normal operation. Th...
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The invention relates to a method for safety seal and flow delivery in the technique of the gasification of dust coal. It uses choke damp or flue gas to pressurize and safely seal the dust coal storage bin, and then uses hydrocarbon gas to lock bucket the dust coal and to pressurize the dust coal feed bin, in order to transport the dust coal to gasification stove. Using the hydrocarbon gas to substitute nitrogen as power carrier of air conveying which is also the material gas of synthetic gas, it doesn't increase the content of nitrogen except the nitrogen carried by coal, available composition of the gas being high; using choke damp to substitute nitrogen as the gas for safety seal and hydrocarbon gas as the power carrier of air conveying, it realizes the cyclical use of resource, for the hydrocarbon gas and limited choke damp carried with dust coal can generate the reformed reaction of hydrocarbon substance and getting corresponding product gas after it into gasification stove.
Description
technical field [0001] The invention relates to a method for safe sealing and airflow conveying in a pulverized coal gasification process. The method utilizes carbon dioxide gas or flue gas to pressurize and securely seal the pulverized coal storage bin, and simultaneously uses hydrocarbon gas to pressurize the pulverized coal lock hopper and the pulverized coal storage bin. The coal pressurizes the bunkers to transport the pulverized coal to the gasifier. Background technique [0002] Using coal as raw material to make synthetic gas, the earliest industrialization in China is UGI furnace fixed bed gasification to produce water gas or semi-water gas. There are currently three types of gasifiers that have been industrialized abroad: Koppers-Totzek furnace, Lurgi furnace and Winkler furnace. The second and third generation coal gasifiers that are being developed and are gradually moving towards industrialization mainly include Texaco furnaces, Shell-Koppers (Shell-Koppers) fu...
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IPC IPC(8): C10J3/46
Inventor 庞玉学冯友茵庞彪王志坚
Owner 成都市通用工程技术有限责任公司