Organic Rankin waste heat power generation method based on high-temperature highly-dusty smoke of metallurgical furnace

Abstract

The invention discloses an organic Rankin waste heat power generation method based on high-temperature highly-dusty smoke of a metallurgical furnace. The organic Rankin waste heat power generation method based on the high-temperature highly-dusty smoke of the metallurgical furnace is characterized in that the smoke of the metallurgical furnace is discharged from a fourth hole and passes through a water-cooling sliding sleeve so as to be mixed with cold air, the smoke mixed with the cold air enters a settling chamber, enters a sinter board dust catcher and then enters a heat-storage temperature uniformizing device after dust in the smoke is removed, the smoke enters a flow uniformizing heat exchange chamber after heat-storage temperature uniformization is conducted on the smoke, heat is released by the high-temperature smoke, so that heat exchange is completed, and the smoke is pressed into an exhaust cylinder through a main fan so as to be discharged to the atmosphere; heat of the smoke is absorbed by circulating water in a heat exchanger at the same time, a vapor-water mixture is formed and enters an evaporator, heat is released, the heat of the vapor-water mixture is absorbed by organic working medium liquid, so that working medium steam is formed, the working medium steam expands and acts in an organic turbine with a steam supplying port, and then a power generator is driven to generate power. The organic Rankin waste heat power generation method based on the high-temperature highly-dusty smoke of the metallurgical furnace is also characterized in that R227ea is taken as a circulating organic working medium. By the adoption of the organic Rankin waste heat power generation method based on the high-temperature highly-dusty smoke of the metallurgical furnace, heat energy in the smoke can be recovered to the maximum extent so as to be directly converted into high-grade electric energy, the heat efficiency is improved by 23%-28% compared with single-stage evaporation type organic Rankin circulation, and environmental friendliness is high.

Description

technical field [0001] The invention relates to a metallurgical furnace high-temperature and high-dust flue gas organic Rankine waste heat power generation method. Specifically, the heat energy in the flue gas can be recovered to the maximum extent and converted into high-grade electric energy, and the dust removal ability can be improved. It belongs to the metallurgical furnace dust removal method. 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 steelmaking flue gas from metallurgical furnaces, the temperature entering the pipeline after capture is generally around 1200°C, and the dust concentration reaches 25g / Nm 3 , the ash less than 5um accounts for more than 70% of the total amount of dust, the amount of dust is large, and...

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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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