Waste heat utilization and dust removing method for electric furnace flue gas with thermal storage soaking device

Abstract

A waste heat utilization and dust removing method for electric furnace flue gas with a thermal storage soaking device is characterized in that flue gas emitted from the interior of an electric furnace enters a settling chamber after being mixed with cold air through a water cooling flue duct, then enters a high-temperature dust remover, the thermal storage soaking device and a gas collection chamber in sequence, emits heat quantity, is pressed into an exhaust pipe through a main air blower, and is emitted into the atmosphere; meanwhile, circulating water enters a heat exchanger to absorb the heat of the flue gas, is converted into steam-water mixture, enters an evaporator, and emits heat quantity; an organic working medium absorbs heat in the evaporator through a working medium pump, is converted into steam, and enters a steam pocket; the working medium steam expands in a steam turbine to apply work, thereby driving a power generator to generate electricity. The method is characterized in that the high-temperature dust remover is a high-temperature resistant C-Cu composite material filter element dust remover; R227ea is adopted as the organic circulating working medium; the thermal storage soaking device is adopted for reducing the fluctuation range and peak value of flue gas; heat energy is converted into high-grade electric energy; the device investment and the operation energy consumption are low.

Description

technical field [0001] The invention relates to a waste heat utilization and dust removal method of an electric furnace flue gas with a heat storage homogenizer, specifically, it 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, belonging to an electric furnace Dust removal technology field. Background technique [0002] The iron and steel industry consumes a large amount of energy every year, and the high-temperature flue gas generated during the smelting process and the heat dissipation of equipment take away a large amount of energy. Due to the high temperature of the electric furnace flue gas, the temperature entering the pipeline after being captured is generally around 900°C, and the dust concentration reaches 35g / Nm 3 , The ash less than 5um accounts for more than 80% of the total amount of dust, the amount of dust is large, and it is sticky and fine. Moreover, the tempe...

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Problems solved by technology

However, the actual steam output is far lower than the maximum evaporation capacity of the waste heat recovery device, resulting in the situation of large horses and small carts

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