Energy-saving dust removing method for smoke of metallurgical smelting electric furnace

Abstract

The invention discloses an energy-saving dust removing method for smoke of a metallurgical smelting electric furnace. The method is characterized in that the electric furnace smoke is exhausted out from a fourth hole, is mixed into cold air through a water-cooling sliding sleeve and enters a settling chamber and a heat storage temperature uniformizing device, the smoke exhausted by the heat storage temperature uniformizing device enters a high-temperature heat pipe evaporator and then is mixed with smoke exhausted through an external exhaust pipeline connected to the upper portion of the smelting electric furnace after being exhausted by the high-temperature heat pipe evaporator, and the mixed smoke enters an uniform flow heat exchange chamber; the cooled smoke enters a sinter-plate dust remover and is exhausted into the atmosphere by being pressed into an exhaust funnel through a main fan after dust removal; and meanwhile, circulating water absorbs heat of the smoke from a heat exchanger to form a steam-water mixture which enters an evaporator, heat is released, an organic liquid working medium absorbs heat of the steam-water mixture to become working medium steam which works in an organic turbine with a steam supplementary port in an expanding mode and drives a power generator to generate power, and R717 is adopted as the circulating organic working medium. According to the method, heat energy in the smoke can be recovered and directly converted into high-grade electric energy, and the environment protection effect is good.

Description

technical field [0001] The invention relates to an energy-saving and dust-removing method for flue gas of a metallurgical submerged arc furnace. Specifically, the method can maximize the recovery of heat energy in the flue gas and convert it into high-grade electric energy, and can improve the dust removal ability, and belongs to the technical field of dust removal for submerged arc furnaces. Background technique [0002] At present, waste heat utilization facilities are usually used: water tube waste heat boiler, regenerative waste heat boiler to recover the waste heat of the flue gas of the submerged arc furnace, and generate saturated steam, etc. Because the flue gas temperature of the submerged arc furnace fluctuates violently and the dust content is large, it is difficult for the ordinary water tube waste heat boiler to be used for the waste heat recovery of the flue gas of the submerged arc furnace. At present, the regenerative waste heat boiler has been successfully u...

AI Technical Summary

Problems solved by technology

Due to the drastic fluctuation of flue gas temperature and high dust content, it is difficult for ordinary water tube waste heat boilers to be used for waste heat recovery of flue gas from submerged arc furnaces.

At present, the regenerative waste heat boiler has been successfully used in the waste heat recovery of the flue gas of the submerged arc furnace. The popularization of boilers in the steel industry still faces many problems

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