Dry-method simultaneous desulfurization and dechlorination system and method for blast furnace gas

Abstract

The invention discloses a dry-method simultaneous desulfurization and dechlorination system for blast furnace gas. The dry-method simultaneous desulfurization and dechlorination system comprises a dedusted blast furnace clean gas supply subsystem, a collaborative desulfurization and dechlorination tower subsystem and a collaborative deacidification agent replacement subsystem, wherein, the dedusted blast furnace clean gas supply subsystem is used for feeding clean gas obtained after raw gas generated at the top of a blast furnace passes through a gravity dust collector and a bag-type dust collector into a deacidification subsystem of a collaborative desulfurization and dechlorination tower through a gas input pipeline, the subsystem is connected behind the gas input pipeline, and a collaborative deacidification agent bed layer is mounted in the middle of the interior of the collaborative desulfurization and dechlorination tower and is filled with a collaborative deacidification agent.

Description

Technical field [0001] The present invention relates to the field of blast furnace gas purification technology, in particular, it relates to systems and methods for dechlorination blast furnace gas dry desulfurization simultaneously. Background technique [0002] Currently in the art of blast furnace gas purification, blast furnace gas dry dust compared to traditional techniques wet dust removal, water, dust, high efficiency, full use of the sensible heat of the gas, gas pressure generation amount higher advantages, with residual pressure cogeneration technology a technologically advanced country steel industry to promote energy conservation, development of circular economy. Blast furnace gas dry dust as compared to conventional wet dust, annual savings of 35% of the investment, saving circulating water 7 ~ 9t, saving 60 to 70%, 30% of the new generation, a significant reduction in sewage, sludge. However, the blast furnace gas dry dust can cause severe corrosion of gas piping, P...

AI Technical Summary

Problems solved by technology

At present, most of the desulfurization and dechlorination of blast furnace gas used in industry are step-by-step removal. Separate dechlorination, hydrolysis of organic sulfur, and removal of inorganic sulfur greatly increase the investment in deacidification of blast furnace gas and occupy a large amount of industrial land.

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