A kind of improved coking coal humidity control method and equipment

Abstract

The invention provides an improved coking coal humidity control method, comprising the following steps: sending the dry coking coal obtained after the wet coking coal is dried into the humidity control coal storage bunker; The coking coal is fed with steam to mix the steam with the dry coking coal; the mixed dry coking coal and steam are cooled in the humidity-adjusted coal storage bin, so that the steam is preferentially condensed on the surface of the fine coal powder therein to obtain Humidity into the furnace coal. The purpose of the present invention is to provide an improved coking coal humidity control method and equipment for implementing the method, which can adjust the moisture consistency of dry coking coal, and solve the problem that the traditional drying coal humidity control technology can only dehydrate and dry coking coal. A problem with adjusting its moisture consistency. The use of coking coal humidity control technology can improve coke quality and output, reduce coking energy consumption and sewage discharge, and reduce environmental protection pressure and production costs in the coking industry.

Description

technical field [0001] The invention relates to the field of humidity control of coking coal, in particular to a method for adjusting humidity of dry coking coal by using steam as a humidity control medium, and equipment using the humidity control method. The method and equipment are also applicable to other situations in the technical field of coal clean utilization that require the use of a coal humidity control process. Background technique [0002] Coking coal is a kind of mixed coal specially used for the production of coke by mixing a variety of different coal types according to the proportion required by the coking process. Coking coal has the mixing characteristics of its main coal blending. In addition, this type of coal has caking The characteristics of strong resistance, its water content varies with seasons and sources of coal types and is unevenly distributed, the particle size of coal is inconsistent, and the proportion of fine coal powder is relatively high. ...

AI Technical Summary

Problems solved by technology

[0018] According to statistical data, compared with coal with larger particle size, the moisture content of these fine coal powders is higher before pretreatment, and it is especially necessary to reduce its moisture content through dehydration drying process, but due to the characteristic limitation of thermal drying method and fine coal powder With a larger surface area, these fine coal particles are dehydrated faster than coal particles with larger particle sizes during the thermal drying process, resulting in that the moisture content of fine coal particles will decrease after coking coal with different particle sizes is dried under the same conditions. From higher to lower, the fine coal dust after deep drying is more likely to generate coal dust and leak into the surrounding environment and raw gas system during the subsequent coking coal transportation and furnace loading process

This shows that it is very difficult and complicated to use the humidity control technology of coking furnace coal to properly reduce the excess moisture in the coking furnace coal, and at the same time achieve the purpose of precisely adjusting its moisture consistency.

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