Integrated waste heat generating and dust removing method utilizing flue gas from interior and exterior of electric furnace

Abstract

An integrated waste heat generating and dust removing method utilizing flue gas from the interior and the exterior of an electric furnace is characterized in that flue gas from the interior of the electric furnace is discharged through a fourth hole, is mixed with cold draft through a water-cooling sliding sleeve to burn carbon monoxide and then enters a settling chamber; flue gas getting out of the settling chamber enters a thermal storage uniform-temperature chamber and is cooled to about 100 DEG C, the cooled flue gas comes out of a booster to be mixed with flue gas getting out of an external discharge pipeline connected above a metallurgical furnace and enters a dust remover together, and the flue gas is pressed into an exhaust pipe to be discharged into the atmosphere; a low-boiling-point working medium absorbs heat of a flue gas waste heat carrier in an evaporator to become saturated steam, the saturated steam enters a steam pocket, and expands and acts in a steam turbine to drive a three-phase generator to generate power; R290 is a circulatory organic working medium. The steam pocket can be adopted to filter supersaturated moisture and impurities in a gas source to ensure stable running of the steam turbine, and the integrated organic Rankine waste heat generating and dust removing method can be adopted to reclaim heat energy in flue gas to the utmost extent and converts the heat energy into high-grade electric energy to achieve the purposes of energy saving and environmental protection.

Description

technical field [0001] The invention relates to a dust removal method with waste heat power generation integrated with internal and external flue gas exhaust of 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 removal ability, and belongs to the technical field of electric furnace dust removal. 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 commonly used: water column waste heat boilers, regenerative heat pipe heat exchangers to recover waste heat from electric furnace flue gas, and generate saturated steam, etc. Because the flue gas temperature fluctuates sharply and the dust content is large,...

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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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