Coke drying method of coke drying air distribution system for coke bin

Abstract

The invention relates to a coke drying air distribution system for a coke bin.The bottom of the coke bin is provided with an upper conical hopper and a lower conical hopper which are inserted together in a sleeving mode, and an annular gap formed by sleeving insertion eaves forms an annular air duct; an upper air chamber is arranged outside the upper conical hopper, a lower air chamber is arranged outside the lower conical hopper, and a cross-shaped air duct formed in the portion, corresponding to the lower air chamber, of the lower conical hopper is communicated with a central air cap located in the center of the coke bin; the upper air chamber and the lower air chamber are independently arranged and connected with external air supplying pipelines respectively, the upper air chamber supplies air to the annular air duct, and the lower air chamber supplies air to the central air cap through the cross-shaped air duct; the external air supplying pipelines are each provided with an air inflow regulating device, and the air inflow regulating devices are controlled by a control system.According to the coke drying air distribution system for the coke bin, the air flow of hot waste gas entering the coke bin in the peripheral direction and the central area of the bin can be effectively controlled and regulated, and therefore uniform hot air distribution is achieved; meanwhile, the problems that coke in the center of the bin flows rapidly, and coke at the periphery of the bin flows slowly are solved; the system is beneficial for achieving uniform falling and drying of the coke in the bin to achieve the purposes of stable coke storing and moisture regulating.

Description

technical field [0001] The invention relates to a coke bin (coke storage bin), in particular to a coke drying method of a coke drying air distribution system for the coke bin. Background technique [0002] Coke is used as fuel and reducing agent for blast furnace ironmaking, and its product quality and water stability directly affect the quality and efficiency of ironmaking. As a major coke producer, my country has an annual output of about 476 million tons of coke, of which 200 million tons are quenched by dry method with a water content of 1%, and 276 million tons are quenched by a wet method with a water content of 4%-8%. [0003] Wet coke quenching basically does not go through drying and directly enters the blast furnace for ironmaking. Due to the high moisture content of the wet coke quenching coke or the coke freezing in winter, the coke powder adhering to the coke surface is not easy to sieve out in front of the blast furnace. After the coke enters the blast furnace...

AI Technical Summary

Problems solved by technology

Because there is no air distribution device at the bottom of the coke bin, the hot air is unevenly distributed around and in the center of the coke bin, causing the coke around the coke bin and the center to be heated and dried uniformly and synchronously, the heating and drying efficiency is low, and the coke moisture at the outlet of the coke bin fluctuates greatly

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