Power generation, energy saving and dedusting method by utilizing heat waste of exhaust gas in electric furnace through organic rankine cycle

Abstract

The invention discloses a power generation, energy saving and dedusting method by utilizing heat waste of exhaust gas in an electric furnace through organic rankine cycle, which is characterized in that the exhaust gas in the electric furnace is discharged from a fourth hole, 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 uniform velocity waste heat exchanger; the exhaust gas discharges 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 is driven by a working medium pump to absorb the heat in a straight pipe plate heat pipe exchanger to be changed into 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 is then fed into the straight pipe plate heat pipe exchanger, so as to start a new round of circulation. The power generation, energy saving and dedusting method by utilizing the heat waste of the exhaust gas in the electric furnace through the organic rankine cycle is characterized in that R600 is adopted as a circulating organic working medium. With the adoption of the power generation, energy saving and dedusting method by utilizing the heat waste of the exhaust gas in the electric furnace through the organic rankine cycle, the heat energy in the exhaust gas is recovered to a maximum limit to be transformed into high-grade electric energy. The device is low in investment, low in operation energy consumption and good in environment-protection effect.

Description

technical field [0001] The invention relates to an energy-saving and dust-removing method for organic Rankine waste heat power generation of flue gas exhausted in an electric 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-removing ability, and belongs to the technical field of dust-removal for electric furnaces. Background technique [0002] In the prior art, the purification device for electric furnace flue gas is electric furnace flue gas generating equipment, waste heat utilization facilities, and dust collectors connected in sequence through pipelines. [0003] At present, waste heat utilization facilities are usually used: water column waste heat boiler, regenerative heat pipe waste heat boiler to recover the waste heat of electric furnace flue gas and generate saturated steam, etc. Because the flue gas temperature fluctuates sharply and the dust content ...

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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 system, resulting in the situation of large horses and small carts

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