Converter coal gas high-temperature bag-type dust removing system

Abstract

The invention relates to a converter coal gas high-temperature bag-type dust removing system which comprises a converter, a high-temperature evaporative cooling tower, a high-temperature bag-type dust remover, a coal gas blower, a changeover valve station, a blow-off chimney, a spectacle valve, a coal gas cooling tower and an automatic control system which are connected in sequence through pipelines. The high-temperature evaporative cooling tower substitutes an evaporative cooling tower in an LT system or substitutes a sizing or manual diameter-regulating overflow venturi tube or a saturated spraying tower in an OG system; and the high-temperature bag-type dust remover substitutes an electrostatic dust remover in the LT system or an automatic diameter-regulating venturi tube or a circular seam washer in the OG system. The invention is called as a converter coal gas BG dry-method remover for short, has the advantages of high coal gas dust removing efficiency, lower system operation resistance and energy consumption, high coal gas recovery rate, and the like, has no problems of system blockage and secondary pollution of water, is not only in accordance with the strict environment protection requirements, but also can reclaim coal gas and realize converter negative-energy steel making.

Description

technical field [0001] The invention relates to high-temperature gas dedusting and recovery in the process of converter steelmaking in a metallurgical steel plant, in particular to a high-temperature bag-type dedusting system for converter gas. Background technique [0002] At present, there are two main methods of dust removal and recovery in steel mills: wet method (abbreviated as OG) and dry method (abbreviated as LT). [0003] The converter gas wet dedusting device represented by OG is mainly composed of a secondary dedusting device and a dehydration device. The first stage adopts sizing or manual diameter-adjusting overflow venturi tube (abbreviated as a text) or spray cooling tower, which is used for cooling and coarse dust removal of raw converter gas. The second stage adopts automatic diameter-adjusting Venturi tube (referred to as Erwen) or annular seam scrubber (referred to as RSW), and its function is to remove dust from raw coal gas. The dehydration device is u...

AI Technical Summary

Problems solved by technology

Although the LT dry dedusting system is obviously superior to OG in terms of gas dedusting and system energy consumption, but because the LT method needs to be imported from abroad, the investment cost is relatively high, there are many failures of the electrostatic precipitator, and equipment research and operation experience, etc. It has affected the promotion and popularization. At present, there are only more than 20 converters in the country, and more than 60 converters in the world have adopted the LT dry dust removal system

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