Power generation energy-saving and dedusting method by using multi-level organic Rankine waste heat of smoke in semi-airtight electric furnace

Abstract

Disclosed is a power generation energy-saving and dedusting method by using multi-level organic Rankine waste heat of smoke in a semi-airtight electric furnace. The power generation energy-saving and dedusting method by using the multi-level organic Rankine waste heat of the smoke in the semi-airtight electric furnace is characterized in that the smoke in the semi-airtight electric furnace is discharged through a fourth hole and is mixed with cold wind through a water-cooling sliding sleeve and enters a combustion settling chamber and then enters a high-temperature dust remover, the smoke enters a smoke collection chamber after the smoke is dedusted and heat accumulation and temperature equalization are carried out on the high-temperature smoke through a ceramic heat accumulator, and then heat exchange is achieved, and the smoke is pressed into a exhaust funnel through a main air blower and is discharged into the atmosphere, meanwhile, the circulating water is driven through a feed water pump of a heat exchanger and then the circulating water enters the heat exchanger installed in the smoke collection chamber to absorb the heat of the smoke, and then steam-water mixture is formed, organic working medium liquid absorbs the heat energy of the steam-water mixture and expands and does work in a multi-level organic turbine, and a generator is driven to generate power, a silicon carbide composite filter element is arranged in the high-temperature dust remover, and R114 is adopted as circulating organic working medium. According to the power generation energy-saving and dedusting method by using the multi-level organic Rankine waste heat of the smoke in the semi-airtight electric furnace, a 'peak clipping and valley filling' function is achieved, fluctuation range of temperature is reduced, and the heat energy in the smoke is absorbed to the maximum degree and is converted into high-quality electric energy.

Description

technical field [0001] The invention relates to a semi-closed electric furnace flue gas multi-stage organic Rankine waste heat power generation energy-saving and dust removal method. Specifically, the heat energy in the flue gas can be recovered to the maximum and converted into high-grade electric energy, and the dust removal ability can be improved. It belongs to the semi-closed method. 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 semi-closed electric furnace steelmaking flue gas, the temperature entering the pipeline after being captured is generally around 1200°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, t...

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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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