Dust removing and waste heat recycling technology and system for steelmaking converter gas

Abstract

The invention provides a dust removing and waste heat recycling technology and system for steelmaking converter gas for overcoming the defects that in the prior art, a dust removing and cooling technology and system for steelmaking converter gas is large in water resource demand and cannot sufficiently utilize waste heat. The system comprises an evaporative cooling flue, a high-temperature heat exchange and dust reducing device, a high-temperature film dust removing and heat exchange device and a steam collecting device. The high-temperature film dust removing and heat exchange device comprises a pipe body and a dust removing element. The pipe body comprises a dust air cavity and a purified air cavity which communicate with each other. A cooling pipe is arranged in the pipe body to cool high-temperature gas entering the pipe body. A smoke outlet of the high-temperature heat exchange and dust reducing device communicates with the dust air cavity of the high-temperature film dust removing and heat exchange device, and outlet ends communicate with the steam collecting device. In the process of adopting the technology and system for conducting dust removing and cooling on the steelmaking converter gas, heat of the gas can be effectively collected, the gas is conveyed into a steam drum to be cycled and reused, a cold water cooling method is adopted on necessary occasions for cooling the gas, and therefore the waste heat recycling amount is large.

Description

technical field [0001] The invention relates to the technical field of environmental protection and energy saving, in particular to a process and a system for recovering waste heat from gas dedusting in a steelmaking converter. Background technique [0002] At present, in the steelmaking converter gas dedusting process, the steelmaking converter gas dry dedusting process is used in the industry to replace the Venturi tube wet spraying cooling dedusting process or the LT dry evaporative cooling plus electrostatic dedusting process commonly used at home and abroad. Compared with the wet dedusting process, the steelmaking converter gas dry dedusting can reduce the motor power of the steelmaking converter's primary dedusting fan by 50%, and at the same time reduce the wet dedusting sludge treatment process, saving sludge treatment power consumption by 200-300kW / h; Compared with LT dry evaporative cooling plus electric dust removal process, it can reduce the risk of explosion, ha...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems that the existing steel-making converter gas dedusting and cooling process and system have a large demand for water resources and the waste heat cannot be fully utilized, and provides a steel-making converter gas dedusting waste heat recovery process and system

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