Technique process for coal flow fractionation and moisture adjustment

Abstract

The invention discloses a process of fractionating and conditioning airflow for coal, which belongs to coal pretreatment process in coking industry and mainly solves problems of complex program, much device, large investment and high energy consumption for existent process. The method uses flue waste gas of coke oven as heat source and power source to carry drying and gradual crushing of coal, and realizes a coal pretreatment of combining dry, classifying and preheating together. The method centralizes characteristic and predominance of coal conditioning process and coal pneumatic selection comminution process for not only increasing output of coke oven, reducing energy consumption and surplus ammonia of coke oven, but also utilizing residual heat of coke oven flue waste gas. After employing the process, moisture of charged coal is reduced to 6% from 8-10%, production capability of coke oven is increased about 5%, heat consumption of coking is reduced about 310kJ/kg, and stacking density of charged coal is increased.

Description

technical field [0001] The invention relates to a coal pretreatment process in the coking industry. Background technique [0002] The coal humidity control process and the coal pneumatic selective crushing process are the most advanced coal pretreatment processes in the coking industry at home and abroad. [0003] The former (coal humidity control process) can dry the mixed coal moisture from 9% or even higher to about 6%, so as to increase the coal loading and coke output of the coke oven, improve the quality of coke, reduce the consumption of gas for coke oven heating, and reduce the consumption of coke oven. It has good economic and environmental benefits. The latter (pneumatic selective crushing process) realizes the separation and crushing of different particle sizes of coal through pneumatic motion, increases the heap specific gravity of coal into the furnace, improves the cohesiveness of blended coal, and improves the thermal performance of coke. At the same time, on...

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Problems solved by technology

However, the traditional coal humidity control process and coal pneumatic selective crushing are completed by different equipment according to their own independent process steps, whi

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