Metallurgical furnace high-dust-content smoke organic Rankin waste heat power generation method

Abstract

A metallurgical furnace high-dust-content smoke organic Rankin waste heat power generation method is characterized in that metallurgical furnace smoke is discharged from a fourth hole, is mixed with cold air through a water cooling sliding sleeve, enters a settling chamber, then enters a high temperature dust remover to be subjected to dust moving and enters a heat accumulation temperature evening device to be subjected to heat accumulation and temperature evening, then the smoke enters a flow evening heat exchange chamber, and high temperature smoke releases heat to finish heat exchange. The smoke is pressed into an exhaust barrel through a main fan to be discharged into the atmosphere. Meanwhile, circulation water absorbs heat of the smoke from a heat exchanger to form steam water mixture which enters an evaporator, the steam water mixture releases heat, organic working medium liquid absorbs heat of the steam water mixture to form working medium steam, and the working medium steam expands and does work in an organic turbine with a steam supplementation port to drive a power generator to generate power. The method is characterized in that R227ea is adopted as the circulation organic working medium. By means of the method, heat energy in the smoke can be recycled to the largest extent and directly converted into high level power, the heat efficiency is increased by 23-28% compared with single-stage evaporation organic Rankin circulation, and the environment protection effect is good.

Description

technical field [0001] The invention relates to an organic Rankine waste heat power generation method for high-dust-laden flue gas in a metallurgical furnace, in particular, it can maximize the recovery of thermal energy in flue gas and convert it into high-grade electric energy, and can improve the dust-removing ability, and belongs to the dust-removing technology of metallurgical furnaces. field. Background technique [0002] The iron and steel industry consumes a lot of energy every year, and the high-temperature flue gas and equipment heat dissipation generated during the smelting process take away a lot of energy. Due to the high temperature of steelmaking flue gas in metallurgical furnaces, the temperature of the flue gas entering the pipeline after capture is generally around 1200 °C, and the dust concentration is 25g / Nm 3 , the ash less than 5um accounts for more than 70% of the total dust, the dust is large, and it is sticky and fine. In addition, the flue gas tem...

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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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