Dry activated coke desulfurization system and method for purifying tail gas of steel rolling heating furnace

Abstract

The invention provides a dry activated coke desulfurization system for purifying tail gas of a steel rolling heating furnace. The system comprises a flue gas system, an adsorption system, a nitrogen protection system and a material transportation system; the flue gas system comprises a steel rolling furnace tail gas connector, a hot-blast stove and a fan; the steel rolling furnace tail gas connector is connected with a hot-blast stove gas inlet through a pipeline, and a hot-blast stove gas outlet is connected with a fan gas inlet through a pipeline; the adsorption system comprises an air inletchamber, an adsorption tower, a top stock bin and a chimney; an air outlet of the fan is communicated with the middle part of the air inlet chamber by virtue of a pipeline with a flue gas inlet regulating valve. The system is simple in process operation and stable in equipment operation, the activated carbon can be recycled, and the operation cost is reduced. Old activated carbon can be ground into powder and then conveyed to coal injection, and solid waste such as Na2SO4 and CaSO4 generated in the desulfurization process is avoided. The activated carbon can adsorb and degrade pollutants in the flue gas, and the separated SO2 is sent to an acid making system for resource recycling.

Description

technical field [0001] The invention belongs to the field of tail gas purification of a steel rolling heating furnace, and in particular relates to a dry-process activated coke desulfurization system and method for purifying the tail gas of a steel rolling heating furnace. Background technique [0002] The purpose of heating during rolling is to heat the billet to a uniform temperature suitable for rolling (austenite structure). After the temperature is raised, the first is to improve the plasticity of the steel, reduce the deformation resistance, and make the steel easy to deform. For steel with appropriate heating temperature, a larger reduction can be used during rolling to reduce equipment accidents caused by wear and impact, improve the productivity and operation rate of the rolling mill, and improve the internal structure and performance of the billet. [0003] The heating furnace is one of the main energy-consuming equipment in the rolling mill. Most of its fuel is b...

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Problems solved by technology

[0006] The invention aims to solve the problem of SO in the tail gas of the steel rolling heating furnace 2 The content exceeds the standard while simplifying the problem of desulfurization process

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