Method for carrying out multi-purification treatment on tar-containing dust

Abstract

The invention relates to a method for carrying out multi-purification treatment on tar-containing dust. The method adopts a multi-purification manner of coke adsorption, gravity settling and bag type dust removing to carry out purification treatment on coaling smoke dust of a coke furnace; an adsorption and purification unit, a pressure-equalizing primary separation section and a terminal purification unit are arranged; the terminal purification unit and the adsorption and purification unit are in an integrated structure; the adsorption and purification unit comprises a smoke channel, a pure gas channel and a coke adsorbing body; the smoke channel and the pure gas channel are alternatively arranged and are separated by the coke adsorbing body; the pressure-equalizing primary separation section is in a labyrinth type baffle structure; an inlet of the pressure-equalizing primary separation section is communicated with the pure gas channel of the adsorption and purification unit; the terminal purification unit adopts a cloth bag to filter; and the inlet of the terminal purification unit is provided with the pressure-equalizing primary separation section. The method integrates coke adsorption, gravity settling and bag type dust removing functions and can realize the multi-purification treatment of smoke containing sticky substances including the tar and the like; and a purification effect is good and the service life of a device is long.

Description

technical field [0001] The invention relates to a method for multiple purification treatment of dust containing viscous substances such as tar. Background technique [0002] The flue gas discharged from the top-charging and tamping coke ovens contains tar and other viscous substances during coal charging. The viscous substances contained in the flue dust must be removed before entering the bag filter, otherwise the filter bag will be blocked and the resistance of the filter bag will increase. Large, which not only affects the normal operation of the dust collector but also shortens the service life of the filter bag. At present, water washing, pre-spraying or adsorption by flue gas adsorption and purification devices are often used to solve the problem of sticky dust adhesion, but there are certain limitations. The water washing method has high energy consumption, large water consumption, long process, secondary pollution, and is limited by climatic conditions; the pre-spra...

AI Technical Summary

Problems solved by technology

The water washing method has high energy consumption, large water consumption, long process, secondary pollution, and is limited by climatic conditions; the pre-spray adsorption method is often not ideal due to insufficient active powder quantity or untimely supply, and still occurs. The phenomenon of tar blocking the filter bag; the flue gas adsorption and purification device has been greatly improved compared with the previous two methods, and can achieve better adsorption effect, but there are still some problems: it is easy to form a "bridge" when the lower hopper is unloading, It affects the normal update of the particle layer; the shell of the adsorption device is mostly cylindrical, which brings a lot of inconvenience to the maintenance work of the field workers; the adsorption device and the bag filter are connected by pipes, and the coke is easily sucked into the bag The dust collector damages the bag and shortens the service life of the filter bag

Images