High-temperature flue gas waste heat utilizing device for metallurgical furnace

Abstract

The invention relates to a high-temperature flue gas waste heat utilizing device for a metallurgical furnace. The high-temperature flue gas waste heat utilizing device for the metallurgical furnace comprises a heat exchanging box and a heat exchanging tube nest. A dust removing plate is arranged outside the heat exchanging tube nest in a sleeving mode and is provided with a plurality of through holes. Vertical tubes of the heat exchanging tube nest are arranged in the through holes in a penetrating mode and are connected with the through holes of the dust removing plate in a sliding mode. A hydraulic cylinder is fixedly arranged at the top of the heat exchanging box, and a cylinder barrel of the hydraulic cylinder is fixed to the top of the heat exchanging box. A piston rod of the hydraulic cylinder penetrates through the top of the heat exchanging box and is fixedly connected with the dust removing plate arranged inside the heat exchanging box. According to the high-temperature flue gas waste heat utilizing device for the metallurgical furnace, the hydraulic cylinder drives the dust removing plate to move up and down, and flue gas on the tube walls of the vertical tubes of the heat exchanging tube nest is removed, so that the high heat exchanging efficiency of the high-temperature flue gas waste heat utilizing device for the metallurgical furnace can be maintained continuously, the waste heat recovery is fully conducted, and the economic value of a waste heat system is improved; the vertical tubes of the heat exchanging tube nest are in clearance fit with the through holes of the dust removing plate, so that the phenomenon that the dust removing plate is stuck during the up and down operation process can be prevented.

Description

technical field [0001] The invention relates to the technical field of metallurgy and energy saving, in particular to a device for utilizing waste heat of high-temperature flue gas of a metallurgical furnace. Background technique [0002] In the prior art, the purification device for the flue gas of the metallurgical furnace is the flue gas generating equipment of the metallurgical furnace, the waste heat utilization facility, and the dust collector are connected in sequence through pipelines. The waste heat utilization facility usually used at present is a heat exchanger, which is a device that can not only reduce the temperature of the flue gas, but also utilize the high-temperature flue gas to achieve the purpose of heat exchange. Water column waste heat boiler and regenerative heat pipe heat exchanger are used to recover the waste heat of metallurgical furnace flue gas and generate saturated steam, etc. Because the flue gas temperature of metallurgical furnace fluctuate...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to solve the problem that the flue gas of the existing metallurgical furnace has a large amount of dust, when using the waste heat boiler with water tubes, the heat exchange effect in the early stage is relatively good. More and more smoke and dust will accumulate on the wall, resulting in a decrease in heat exchange efficiency, relatively reducing the economic value of the waste heat system, and increasing the investment of the waste heat system. The invention provides a high-temperature flue gas waste heat utilization device for metallurgical furnaces. The up and down movement of the dust removal plate is driven by the hydraulic cylinder to scrape off the smoke and dust on the vertical tube wall of the heat exchange tube, so that it can continuously maintain a high heat exchange efficiency, fully recover the waste heat, and improve the economy of the waste heat system value

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