A Pneumatic Conveying Method for Coarse Ash in Converter Gas Dry Dust Removal

Abstract

The invention relates to a pneumatic conveying method for removing dust and crude ash in a dry process of converter gas. The method comprises the following steps of S1, constructing a pneumatic conveying system for removing dust and crude ash in the dry process of converter gas; S2, feeding: ash is discharged into a first cabin pump (11) or a second cabin pump (16); S3, fluidization: nitrogen enters into a first fluidization device or a second fluidization device from a gas storage tank (19); S4, conveying: the uniformly fluidized gas and ash mixture is conveyed into a crude ash cabin (25) through a pneumatic conveying pipe (24); S5, sweeping, and S6, moving by transportation. According to the method, a high-efficiency waste heat recycling and heat exchanging device is adopted, the method of indirect heat exchange is used, no direct spraying water exists, the problem that an evaporative cooling device is easily hardened is thoroughly solved, and the problem that a built-in chain conveyor is blocked by dust caused by water dropping is also solved. After the high-efficiency waste heat recycling and heat exchanging device is used, waste heat in raw coal gas is greatly recycled, dust can be removed, energy is saved, and the environment is protected.

Description

technical field [0001] The invention relates to the field of environmental protection, and more specifically relates to a pneumatic conveying method for dry dust removal of converter gas and coarse ash. Background technique [0002] With the increasing awareness of environmental protection, most newly built and rebuilt converters use dry dust removal. The existing coarse ash conveying technology for dry dust removal is: spray water in the evaporative cooler to reduce dust, and the collected coarse ash is sent to the main converter under the action of gravity through the built-in chain conveyor, pneumatic flapper valve and pneumatic double flap valve. The coarse ash bin in the factory building is transported by car for comprehensive utilization after humidification. [0003] The main problems of the existing coarse ash conveying technology for dry dust removal are as follows: first, the evaporative cooler is easy to harden, and water droplets will precipitate when the water ...

AI Technical Summary

Problems solved by technology

[0003] The main problems of the existing coarse ash conveying technology for dry dust removal are as follows: first, the evaporative cooler is easy to harden, and water droplets will precipitate when the water spray control is not good, which will cause the built-in chain conveyor to get stuck and affect the normal production of the converter; First, the storage and transportation of coarse ash are limited by the site and distance; third, the humidification of coarse ash is not uniform, resulting in dust everywhere during ash unloading, polluting the environment

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