Power generation and dedusting method by utilizing waste heat of high-temperature alternating exhaust gas in electric furnace through organic rankine cycle

Abstract

The invention discloses a power generation and dedusting method by utilizing waste heat of high-temperature alternating exhaust gas in an electric furnace through organic rankine cycle, which is characterized in that the exhaust gas in the electric furnace is discharged, and enters a combustion settling chamber after cold air interfuses the exhaust gas through a water-cooling sliding sleeve; the exhaust gas passing through the combustion settling chamber enters a heat storage temperature equalizer, and then enters a waste heat exchange chamber after passing through the heat storage temperature equalizer; the exhaust gas discharges the heat, enters a bag-type dust collector, and is pressed into an exhaust funnel to be discharged into atmosphere by a main fan after being dedusted; meanwhile, an organic working medium absorbs the heat through a working medium pump in an evaporimeter to be changed into saturated vapor; and the working medium vapor swells to do work in a steam turbine to drive a generator to generate electricity. The working medium vapor discharged from a low-boiling-point working medium steam turbine is condensed into saturation liquid by a condenser; and the working medium liquid is pressurized by the working medium pump, and enters the evaporimeter to start a new round of circulation. The power generation and dedusting method by utilizing the waste heat of the high-temperature alternating exhaust gas in the electric furnace through the organic rankine cycle is characterized in that R123 is adopted as a circulating organic working medium. With the adoption of the heat storage temperature equalizer, the amplitude and a peak value of fluctuation of the exhaust gas are reduced, the heat energy is transformed into the high-grade electric energy, and the device is low in investment and low in operation energy consumption.

Description

technical field [0001] The invention relates to an electric furnace high-temperature alternating flue gas organic Rankine residual heat power generation and dust removal method, 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, and belongs to the technical field of electric furnace dust removal. 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 steelmaking flue gas, the temperature entering the pipeline after being captured is generally around 1100°C, and the dust concentration reaches 18g / Nm 3 , the ash less than 8um accounts for more than 75% of the total amount of dust, the amount of dust is large, and it is stic...

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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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