Entrained flow gasifier used for co-gasification of various forms of raw materials
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A technology of gasification furnace and entrained bed, which is applied to the gasification of granular/powdered fuel, inorganic chemistry, and the manufacture of combustible gas, etc., and can solve the problem of single fixed raw material, etc.
Inactive Publication Date: 2011-09-21
EAST CHINA UNIV OF SCI & TECH
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[0005] However, the entrained bed gasifiers that have been commercially used at present are only suitable for the gasification of a single fixed raw material.
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[0029] With the technology of the present invention, for smaller gasifiers (equivalent to 50-1,000 tons of coal per day), a top-mounted single nozzle scheme is adopted to realize co-gasification of coal slurry and coke oven gas, and the gasifier is lined with refractory bricks. Shenhua coal and coke oven gas are gasified at a weight ratio of 50% each, the coal is transported with 65% coal-water slurry, and the coke oven gas is compressed and transported into the nozzle. The gasifier can process 400 tons of coal and 400 tons of coke oven gas per day. The compositions of raw coal and coke oven gas are listed in Table 1 and Table 2, respectively.
[0030]
[0031] When the gasification pressure is 6.5 MPa and the outlet temperature of the gasifier is 1350°C, the composition and main process indicators of the synthesis gas at the outlet of the gasifier are listed in Table 3 and Table 4.
[0032]
[0033]
[0034] The process nozzle is a three-channel nozzle, the cone a...
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Abstract
The invention provides an entrained flow gasifier used for the co-gasification of various forms of raw materials. The gasifier is formed by overlaying a gasification chamber and a cooling and washing chamber in a pressure-resisting shell. By adjusting a nozzle configuration scheme, the gasification of a single raw material and the co-gasification of gas-liquid-solid raw materials can be realized and the demands of different sizes of gasification systems can be satisfied. For a medium or small system, an overhead nozzle scheme is adopted for 50-1000 tons of coal per day. For a single serie of large-scale system, a multi-nozzle scheme is adopted for 1000-6000 tons of coal per day; the gasification furnace adopts impinging stream (oppesed multi-nozzle) and cross jet stream (overhead nozzle) to efficiently mix the raw materials and efficiently mix the raw materials and gasifying agents (oxygen and steam). The gasification furnace has excellent high flexibility, large load-adjusting range, high raw material utilization rate which is up to more than 98% and low specific oxygen consumption and specific raw material consumption, and the raw material is convenient to change.
Description
technical field [0001] The invention relates to an entrained-bed gasification furnace suitable for co-gasification of various forms of raw materials. Background technique [0002] As society progresses, fossil energy is becoming increasingly scarce. One of the current hot research directions in the field of energy research is to use gasification technology to convert fossil energy, such as coal, petroleum (residual oil, pitch, petroleum coke, etc.), natural gas (including oil field gas, coal bed methane); biomass energy, such as Straw, wood, etc.; waste energy, such as domestic garbage, sludge, excrement, tires, etc.; industrial waste gas, such as coke oven gas, refinery gas, blast furnace gas, etc., are processed into synthesis gas to achieve efficient and clean conversion of gasification raw materials, Then the synthesis gas is further processed into chemical fertilizers (ammonia, urea), methanol, dimethyl ether, motor fuel, or methanol is further processed into olefins (...
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