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Safety sealing and air flow conveying method for fine coal gasification process

A technology of airflow conveying and coal gasification, which is applied to the gasification of granular/powdered fuels, the petroleum industry, and the manufacture of combustible gases. , increase the cost, the effect of high gas active ingredients

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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AI Technical Summary

Problems solved by technology

[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

Method used

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  • Safety sealing and air flow conveying method for fine coal gasification process
  • Safety sealing and air flow conveying method for fine coal gasification process
  • Safety sealing and air flow conveying method for fine coal gasification process

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Embodiment Construction

[0019] 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. Gas (or flue gas with low oxygen content) to maintain its slightly positive pressure operation, and regularly remove part of the exhaust gas through the pipeline 24. Then, the pulverized coal enters into two alternately switched pulverized coal lockers 7a, 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 through the pipeline 10 intermittently through the pipeline 11. Carbon dioxide gas with a pressure of 0.1-6.9MPa and a temperature of room temperature to 100°C is intermittently filled into the pulverized coal lock hopper through pipeline 6 or pipeline 8 to maintain its positive pressure operation, and at the same time intermittently and alternately through pipeli...

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Abstract

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 seal safely the dust coal storage bin, and then uses choke damp to lock bucket the dust coal and to pressurize the dust coal feed bin, in order to transport the dust coal to gasification stove, temperature of said choke damp using to pressurize the feed bin being from normal temperature to less than 100 Deg. C, and pressure being 0.1-6.9 MPa. Using the specified choke damp to substitute nitrogen as power carrier of air conveying doesn't leaven the quality of the prepared synthetic gas or 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 realizes the rational use of resource, for the limited choke damp carried with dust coal can generate non-catalytic reaction 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 to pressurize and seal pulverized coal storage bins safely, and simultaneously pressurizes pulverized coal lock hoppers and pulverized coal feed bins, so as to The pulverized coal is sent 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) furnaces and GSP gasifiers, etc., except for UGI, etc. Except for fixed bed gas...

Claims

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Application Information

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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
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