Heat exchanger used for recycling exhaust gas and waste heat of rotary hearth furnace

Abstract

The invention provides a heat exchanger used for recycling exhaust gas and waste heat of a rotary hearth furnace. A plurality of heat exchanging pieces (2) are arranged in a heat exchanger framework (1) of the heat exchanger, the plurality of heat exchanging pieces (2) form a plurality of high temperature channels (3) and a plurality of low temperature channels (4), and the heat exchanger further comprises an ash scrapping device (5). The ash scrapping device (5) comprises a control part (6) and a plurality of scrapers (7) used for scraping dust containing zinc on the surfaces of the heat exchanging pieces (2), the scrapers (7) are designed into structures penetrating through the high temperature channels (3), and the scrapers (7) are connected with the control part (6). The control part (6) is arranged into a structure capable of controlling the scrapers (7) to perform vertical movement on the surfaces of the heat exchanging pieces (2). The heat exchanger used for recycling exhaust gas and waste heat of the rotary hearth furnace not only achieves recycle and cyclic utilization of heat energy of high temperature waste heat, but also avoids pollution on the environment caused by resource waste and waste gas emission.

Description

technical field [0001] The invention belongs to the technical field of thermal energy application, and more specifically relates to a heat exchanger for waste heat recovery of exhaust gas of a rotary hearth furnace. Background technique [0002] In the prior art, the rotary hearth furnace has no treatment measures for the waste gas, and it is directly discharged into the atmosphere, but the temperature of the waste gas is high, which not only causes a great waste of energy, but also contains a large amount of zinc dust in the waste gas of the rotary hearth furnace, which is directly discharged into the air. The atmosphere also causes air pollution and waste of resources. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a heat exchanger for recovery of waste heat from waste gas of rotary hearth furnace, which can avoid the waste of waste heat of existing waste gas and realize the recovery and recycling of heat ener...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the rotary hearth furnace has no treatment measures for the waste gas, and it is directly discharged into the atmosphere, but the temperature of the waste gas is high, which not only causes a great waste of energy, but also contains a large amount of zinc dust in the waste gas of the rotary hearth furnace, which is directly discharged into the air. Atmosphere, also caused air pollution and waste of resources

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