Coking chamber for pulverized coal destructive distillation

Abstract

A coking chamber for pulverized coal destructive distillation is formed by communicating two or more than two crude gas channels with a gas collection channel, wherein the crude gas channels are constructed by at least two or more than two layers of gas guiding bricks and at least two or more than two layer of standard bricks in separating mode. The coking chamber further comprises at least two or more than two gradually-expanding sections formed by the gas guiding bricks and the standard bricks and the corresponding gradually-contracting sections. The crude gas channels are arranged under acute angle portions of the gas guiding bricks, reduce staying time of crude gases in the coking chamber, improve yield rate of coal tar, shorten passing routine of the crude gases in the coking chamber, and reduce flowing resistance of the crude gases in the coking chamber, so that the coking chamber is suitable for destructive distillation of crude coal and particularly suitable for destructive distillation of pulverized coal with grain size smaller than 5mm.

Description

technical field [0001] The invention relates to a carbonization chamber for dry distillation of pulverized coal, in particular to a multi-stage carbonization chamber for leading out raw gas for powdered coal dry distillation, which is constructed by masonry with gas guide bricks and standard bricks capable of leading out raw coal gas. Background technique [0002] Coal pyrolysis, also known as dry distillation, is the process in which coal is thermally decomposed under the condition of isolation of air to produce gas, coal tar, coke (or semi-coke) and other products. According to the different final heating temperature, it can be divided into low temperature dry distillation, medium temperature dry distillation and high temperature dry distillation. The coal suitable for low-temperature carbonization is generally low-rank coal, and the reserves of low-rank coal are large, accounting for more than 42% of coal reserves. Therefore, low-temperature carbonization technology can e...

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Problems solved by technology

[0009] Based on the above-mentioned prior art, the technical problem solved by the present invention is firstly that if the existing carbonization furnace adopts pulverized coal dry distillation, the resulting raw gas discharge resistance is relatively large, and when the bottom of the carbonization chamber is passed into the furnace gas for cooling, the gas flow resistance is sharp The liquid seal height of the liquid seal tank needs to be increased, and it is difficult to meet the requirements of gas liquid seal and semi-coke export at the same time; secondly, when the existing carbonization furnace adopts pulverized coal dry distillation, the raw coal gas generated stays in the carbonization chamber for a long time , cannot be exported in time, resulting in a low yield of coal tar, so the present invention provides a carbonization chamber for carbonization of pulverized coal

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