Heat storage smoke recovery device

Abstract

The invention discloses a heat storage smoke recovery device, and relates to the technical field of smoke recovery. The heat storage smoke recovery device comprises a four-way valve; four branch pipesof the four-way valve communicate with smoke discharge pipes of two furnace bodies, a high-heat smoke pipe and a low-heat smoke pipe; the high-heat smoke pipe communicates with a first afterheat recovery device; the low-heat smoke pipe communicates with a second afterheat recovery device; the second afterheat recovery device sleeves a three-way pipe; the second afterheat recovery device communicates with the first afterheat recovery device through a smoke reflux pipe; and when a valve blade is positioned in a position A, the smoke discharge pipe on one side communicates with the high-heat smoke pipe, and the smoke discharge pipe on the other side communicates with the low-heat smoke pipe. The heat storage smoke recovery device is simple in structure and low in transformation cost of traditional equipment, facilitates popularization, and can continuously use high-temperature smoke to achieve high afterheat recycling rate; and air in the three-way pipe is continuously heated by low-temperature smoke generated during tapping of a furnace body, so that the afterheat recovery efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of flue gas recovery, in particular to a heat storage type flue gas recovery device. Background technique [0002] Due to the periodic influence of electric furnace smelting, it is difficult to recover and utilize the intermittent flue gas waste heat generated by electric furnaces. Usually, the "water cooling + air cooling" method is used to cool to 200°C and then discharged through dust removal. A large amount of flue gas waste heat is dissipated through cooling water and air. In the atmosphere, a large amount of waste heat from electric furnace flue gas is wasted; at the same time, cooling also requires additional power and water resource consumption. [0003] At present, a small number of electric furnaces recover part of the waste heat of electric furnace flue gas through scrap steel preheating method or heat pipe waste heat boiler. Among them, the electric furnace scrap steel preheating technology is af...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a regenerative flue gas recovery device, which solves the problem that the prior art not only has a complex structure, but is difficult to directly transform the existing equipment, which is not conducive to popularization, and the use of ceramic regenerative walls The ability to absorb heat during steelmaking in the furnace body and release heat when discharging steel in the furnace body to reduce the fluctuation of flue gas waste heat is limited. There will still be situations where the heat of flue gas is high during furnace body steelmaking and low when discharging steel. It is difficult to ensure continuous high-temperature flue gas to generate stable steam

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