Efficient economical dust collecting method and dust collector for iron-smelting blast furnace

Abstract

An efficient energy-saving dust-collecting method and its apparatus for iron-smelting blast furnace are disclosed. The procedure is carried out by pre-cooling wet air before entering them into air blower, re-cooling, lowering temperature below saturated temperature, coagulating while precipitating for water content in wet air, re-cooling, delivering into blast furnace by air blower, discharging smoke from blast furnace, heat-exchanging, recovering partial tailed heat, lowering temperature, bagged collecting dust, storing or generating. It's cheap and simple, has higher heat-transfer rate, long utilizing life, less apparatus, full combustion and recovery and better high-temperature resistance for bagged dust collector.

Description

technical field [0001] The invention relates to a high-efficiency energy-saving dust removal method and equipment for an iron-making blast furnace. Background technique [0002] my country's iron and steel industry ironmaking system (ironmaking, sintering and coking) energy consumption accounted for 67.2% of the total energy consumption of the iron and steel industry, of which the ironmaking process accounted for 46.4%. It can be seen that the blast furnace ironmaking process is the top priority for iron and steel enterprises to implement energy saving and consumption reduction. Driven by the rapid development of the national economy, China's iron and steel industry has entered a stage of rapid development, which has also driven the rapid development of blast furnace ironmaking. With the rapid growth of China's pig iron production, China's blast furnace ironmaking technology has also made some progress. Due to the rapid growth of pig iron production, the supply of iron ore...

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Problems solved by technology

[0013] The purpose of the present invention is to provide a high-efficiency, energy-saving and dust-removing method and equipment for ironmaking blast furnaces to solve the problems of low heat transfer efficiency, huge equipment, large investment and high operating costs in the current blast furnace dehumidification blast existing in the blast furnace ironmaking process. Type dust collector has poor high temperature resistance, high cost, short service life, insufficient recovery and utilization of blast furnace gas waste heat and pressure, and low combustion temperature level of hot blast stove

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