Waste-heat-recovery converter dry-method dust removal process

Abstract

The invention relates to the technical field of converter smoke dust removal and waste heat recovery. The waste-heat-recovery converter dry-method dust removal process comprises the following steps: step 1, extinguishing converter smoke by utilizing steam; step 2, recovering the heat of the extinguished converter smoke by utilizing a waste heat boiler heat exchanger and an oxygen extractor water heat exchanger; step 3, removing the dust by utilizing a gravity dust collector, and collecting smoke and dust by utilizing a water sealing water tank below the gravity dust collector; step 4, introducing the converter smoke passing through the gravity dust collector into an industrial water heat exchanger, cooling the converter smoke to 40 to 50 DEG C, then sending the cooled converter smoke to a heating heat exchanger, and heating to 3 to 5 EG C; step 5, sending the heated smoke to an air filter to remove the dust, and discharging the converter smoke after the dust removal by virtue of an exhaust pipe. The waste-heat-recovery converter dry-method dust removal process is less in investment, when the dust removal problem is solved, a great amount of waste heat can be recovered, the environment-friendly index requirement can be completely met, and the economic benefit and environmental protection effect are good.

Description

technical field [0001] The invention relates to the technical field of converter flue gas dedusting and waste heat recovery, in particular to a waste heat recovery type converter dry dedusting process. Background technique [0002] At present, for the gas recovery and dust removal of high-temperature flue gas above 1500 °C produced in the steelmaking converter production process, after cooling the flue gas through vaporization and cooling to below 1000 °C, the dust is removed, and then the temperature can be drawn by the exhaust fan. The process of recovering part of the converter gas includes wet dust removal and dry dust removal. The wet method is to use sprinkler to extinguish the fire to cool down, and a large amount of water to wash the dust. The dry method is to use steam spraying to extinguish the fire, spray water in an appropriate amount to cool down, without excess water flow, and use electric dust removal. The problem of the wet dust removal method is that the d...

AI Technical Summary

Problems solved by technology

The problem of the wet dust removal method is that the dust removal effect is poor, it cannot meet the environmental protection requirements, the water consumption is large, the cost of sewage recycling is high, the power consumption of the exhaust fan is high, and the waste heat is not used

The problem of dry electrostatic precipitator is to solve the problem of poor dust removal effect, but the investment is large, the space occupied is large, a certain amount of water is still consumed, the power consumption of the exhaust fan is high, and the waste heat is not utilized

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