Electric furnace inner-outer exhaust smoke waste heat power generation energy saving dust removing method

Abstract

An electric furnace inner-outer exhaust smoke waste heat power generation energy saving dust removing method is characterized in that electric furnace inner exhaust smoke is exhausted from a fourth hole, cold air is mixed through a water cooling sliding sleeve, the smoke enters a settling chamber and a heat storage average-temperature device, the smoke goes out of the heat storage average-temperature device and is mixed with smoke out of an outer exhaust pipeline connected above an electric furnace, the mixed smoke enters a flow-equalizing heat storage chamber, the smoke out of the flow-equalizing heat storage chamber enters a sinter board dust catcher, after dust removing, the smoke is pressed into an exhaust funnel by a main fan and is exhausted into the atmosphere, meanwhile, organic working medium liquid absorbs heat of a smoke waste head carrier in a low-pressure stage evaporator, a middle-pressure stage evaporator and a high-pressure stage evaporator and becomes working medium steam, expanding working is carried out in an organic turbine with a steam supplement opening, and a power generator is driven to generate power. The electric furnace inner-outer exhaust smoke waste heat power generation energy saving dust removing method is characterized in that R600a is used as a circulation organic working medium. According to the method, heat energy in the smoke can be recycled to the maximum degree and is directly converted into high-grade electric energy, the heat efficiency is improved by 30%-35% compared with the single-stage evaporation organic Rankine cycle, and environment-protecting effect is good.

Description

technical field [0001] The invention relates to an energy-saving and dust-removing method for power generation with residual heat of flue gas exhausted inside and outside 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-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 the electric furnace flue gas is the electric furnace flue gas generating equipment, the waste heat utilization facility, and the plastic-fired plate dust collector connected in sequence through pipelines. [0003] At present, waste heat utilization facilities are commonly used: water tube waste heat boilers, regenerative waste heat boilers to recover waste heat from electric furnace flue gas, and generate saturated steam, etc. Because the flue gas temperature fluctu...

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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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