Organic Rankin waste heat power generation method based on smoke of semi-closed electric furnace

Abstract

The invention discloses an organic Rankin waste heat power generation method based on smoke of a semi-closed electric furnace. The organic Rankin waste heat power generation method based on the smoke of the semi-closed electric furnace is characterized in that smoke of the semi-closed 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 and then enters a waste heat exchange chamber, heat is released by the high-temperature smoke, cooled smoke comes out through a pressurizing fan and is mixed with smoke discharged from an external exhaust pipeline connected to the upper portion of the electric furnace, the smoke mixture enters a sinter board dust catcher and is pressed into an exhaust cylinder through a main fan so as to be discharged to the atmosphere after dust in the smoke mixture is removed; heat of a carrier for the waste heat of the smoke is absorbed by organic working medium liquid in a low-pressure evaporator, a medium-pressure evaporator and a high-pressure evaporator, so that working medium steam is formed and expands and acts in an organic turbine with a steam supplying port, and a power generator is driven to generate power. The organic Rankin waste heat power generation method based on the smoke of the semi-closed electric furnace is also characterized in that R290 is taken as a circulating working medium. By the adoption of the organic Rankin waste heat power generation method based on the smoke of the semi-closed electric 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 31%-36% compared with single-stage evaporation type organic Rankin circulation, and environmental friendliness is high.

Description

technical field [0001] The invention relates to a semi-closed electric furnace flue gas organic Rankine cycle 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 semi-closed electric furnace dust removal technology. field. Background technique [0002] In the prior art, the purification device for the flue gas of the semi-hermetic electric furnace is the flue gas generating equipment of the semi-hermetic electric furnace, the waste heat utilization facility, and the dust collector are sequentially connected 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 semi-closed electric furnace flue gas, and generate saturated steam, etc. Because the flue gas temperature of th...

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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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