Production process for concentrating water coal slurry by gasification in coal chemical industry and used device

A gasification coal-water slurry and production process technology, applied in the petroleum industry, liquid carbon-containing fuel, grain processing, etc., can solve the problems of small production capacity, high failure rate, high energy consumption, etc., and achieve high production capacity and low failure rate , the effect of low energy consumption

Pending Publication Date: 2018-08-17
JIANGSU QIULIN HEAVY IND
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Problems solved by technology

The traditional two-stage pulping and thickening technology adopts rod mill + wet vertical fine mill. Due to technical limitations, the largest fine mill in China currently has a specification of

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  • Production process for concentrating water coal slurry by gasification in coal chemical industry and used device

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Embodiment Construction

[0015] Such as figure 1 As shown, a coal chemical gasification coal-water slurry thickening production process includes the following steps:

[0016] (1) Put thermal coal with a particle size of ≤20mm into multiple rod mills for grinding to obtain a 200-mesh crude coal-water slurry with a passing rate of 75%, and then enter the buffer tank of the rod mill after preliminary screening, and be pumped to the slurry tank;

[0017] (2) Extract 10% to 20% of the crude coal water slurry entering the slurry tank and send it to a ball mill for grinding together with thermal coal with a particle size ≤ 6mm. Among them, the crude coal water slurry accounts for 80% to 90% , steam coal with a particle size of ≤6mm accounts for 10% to 20%, and a fine coal water slurry with a passing rate of 75% at 325 mesh is obtained. The fine coal water slurry in the agitator accounts for 10% to 20% of the total slurry in the mixing agitator; the remaining coarse coal water slurry after entering the slur...

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Abstract

The invention discloses a production process for concentrating water coal slurry by gasification in coal chemical industry and a used device. The production process comprises the following steps of: (1) putting steam coal with the particle size being less than or equal to 20mm into a plurality of rod grinder for grinding to obtain coarse water coal slurry, then entering rod-grinder buffering tanksafter carrying out primary sieving, and pumping to a slurry accumulating groove; (2) drawing 10%-20% of the coarse water coal slurry entering the slurry accumulating groove, conveying the drawn coarse water coal slurry and the steam coal with the particle size being less than or equal to 6mm into a ball grinder for grinding to obtain 325-mesh fine water coal slurry with the passing rate being 75%, then leading the fine water coal slurry to enter a ball-grinder buffering tank, and pumping to a mixing stirrer; pumping the other coarse water coal slurry entering the slurry accumulating groove tothe mixing stirrer; (3) mixing and stirring the fine water coal slurry and the coarse pumped into the mixing stirrer; (4) leading the water coal slurry after primary sieving into the buffering tank,pumping into a gasifying furnace as a coal gasifying material to carry out gasification. The production process disclosed by the invention has the beneficial effects that the concentration of the water coal slurry is increased by 2%-3%, and the gasifying efficiency and the coal conversion efficiency of the gasifying furnace are greatly improved.

Description

technical field [0001] The invention belongs to the field of gasification coal-water slurry pulping, and in particular relates to a coal chemical gasification coal-water slurry thickening production process and a device used therefor. Background technique [0002] The current coal chemical gasification pulping process uses a wet rod mill as a grinding device, which has a large capacity, relatively coarse gasification slurry particles (200 mesh pass rate of 75%), and low accumulation efficiency of coal-water slurry. Therefore, thermal coal is used The concentration of pulping coal-water slurry is generally only 58% to 60%. However, the CWS particles after ball mill grinding are relatively fine (325 mesh pass rate is 75%), and the CWS accumulation efficiency is high, so the CWS concentration can reach up to 63% to 65%. Through the mixing of coarse slurry and fine slurry, the accumulation efficiency of the slurry is improved, and the gasification efficiency and conversion effi...

Claims

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Application Information

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IPC IPC(8): C10L1/32B02C21/00B02C23/16
CPCC10L1/326B02C21/00B02C23/16B02C2023/165
Inventor 吕本度钱秋林陈龙吕云福
Owner JIANGSU QIULIN HEAVY IND
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