Tinder trapping and heat energy recovery device for flue gas of steelmaking converter

Abstract

The invention discloses a tinder trapping and heat energy recovery device for the flue gas of a steelmaking converter. The tinder trapping and heat energy recovery device comprises a primary superheater and a secondary superheater, wherein the primary superheater has a shell-type structure and is provided with a lower liquid guiding ring, an upper liquid guiding ring and a smoke guiding pipe; theliquid guiding rings are communicated by a water guiding pipe, and the lower liquid guiding ring is provided with a water inlet pipe; a gas guiding pipe bundle is arranged in the secondary superheater; the upper part of the gas guiding pipe bundle is communicated with a gas guiding ring; a superheated steam outlet is formed on the gas guiding ring; and the lower end of the gas guiding pipe bundleis communicated with a steam outlet on the top of the upper liquid guiding ring by a wet steam inlet. The tinder trapping and heat energy recovery device has a series structure of the two-stage superheater, large tinder granules are trapped in the primary superheater to fulfill the aim of removing the dust of the high-temperature flue gas initially, and heat energy of the high-temperature flue gas is recovered by water to generate superheat steam; and the temperature of the superheat steam is regulated by a sprinkling device to meet the requirement of a steam turbine on the stability of steamtemperature. The tinder trapping and heat energy recovery device has a simple structure, dual functions of heat exchange and tinder trapping and a good dedusting effect, runs stably and reliably and is high in heat exchange efficiency.

Description

technical field [0001] The invention belongs to the technical field of steelmaking equipment, and specifically relates to a steelmaking converter flue gas kindling capture and heat energy recovery device with simple structure, stable and reliable operation, capable of effectively trapping large particles of kindling, and improving the heat recovery efficiency of flue gas. Background technique [0002] Converter gas is an important secondary energy source for iron and steel enterprises. Effective recycling of converter gas can not only reduce the production cost of steelmaking, lay the foundation for realizing "negative energy" steelmaking, but also greatly reduce the total amount of pollutant emissions in steel mills. Realize cleaner production. The LT converter gas purification dry treatment technology originated from Germany. This method uses electric field dust removal, and the dust removal efficiency is as high as 99%. It can directly purify the dust content in the flue ...

AI Technical Summary

Problems solved by technology

To sum up, the prior art LT method has many deficiencies such as recovery of latent heat and sensible heat; low steam quality; poor system safety; high failure rate and heavy maintenance and cleaning labor

In order to overcome the problems of easy explosion and low steam quality, it is necessary to develop a device with ignition trapping and stable steam quality, which will help improve the working efficiency of LT method

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