Dry waste heat recovery and dust removal device and method for converter flue gas

Abstract

The embodiment of the invention relates to a dry waste heat recovery and dust removal device and method for converter flue gas. The dry waste heat recovery and dust removal device comprises a converter (1), a vaporization cooling flue (2), a waste heat boiler (6), an evaporation cooling tower (7), an electric dust remover (8), a primary fan (9), switching valves (10), a gas heat exchanger (12), agasholder (13), a bleeding tower (14) and spring explosion venting valves (15), wherein the vaporization cooling flue (2), the waste heat boiler (6), the evaporation cooling tower (7), the electric dust remover (8), the primary fan (9), the switching valves (10), the gas heat exchanger (12), the gasholder (13) and the bleeding tower (14) are sequentially connected through a pipeline. According tothe dry waste heat recovery and dust removal device and method, the water spraying operation in the cooling process can be avoided; the original dry flue gas treatment can be replaced by the flue gastreatment based on a heat exchange and dust removal method; after being discharged from the vaporization cooling flue, flue gas is subjected to heat exchange through the waste heat boiler and then theflue gas subjected to heat exchange enters the bleeding tower or the gasholder, so that the recovery of heat can be achieved; and the energy utilization ratio can be improved and the cost can be reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of iron and steel smelting converter flue gas, and in particular to a converter flue gas dry waste heat recovery and dedusting device and method. Background technique [0002] Converter primary dust removal equipment is an indispensable process dust removal link for converter steelmaking. At present, domestic converter dust removal methods are mainly divided into wet "OG" method and dry method "LT" method, while converter gas dry dust removal "LT" method is more A new type of dust removal structure, the process is as follows: the high temperature flue gas from the converter is cooled by the vaporization cooling flue under the action of the fan, and the dry flue gas enters the evaporative cooler, which performs fire extinguishing, cooling, and coarse dust removal on the flue gas to form about 200 Then the flue gas enters the electrostatic precipitator on the ground for fine dust remo...

AI Technical Summary

Problems solved by technology

[0011] The embodiment of the present invention provides a converter flue gas dry-type waste heat recovery and dedusting device and method to solve the problems that the existing methods for processing converter flue gas lead to waste of a large amount of water resources and heat, and increase production costs

Images