Construction method for anti-bonding automatic-flow coke furnace raw gas waste heat recovery heat transfer unit

Abstract

The invention discloses a construction method for an anti-bonding automatic-flow coke furnace raw gas waste heat recovery heat transfer unit and belongs to the technical field of raw gas waste heat recovery utilization in the process of the coking process. The construction method is: welding of a single-row assembly; bottom clearing of the single-row assembly; aerosol spraying of non-stick coating; and welding of the heat transfer unit. The upper end ports of all the upper heat transferring working medium delivery pipes are respectively welded and communicated with a steam discharge pipe, and the lower end ports of all the lower heat transferring working medium delivery pipes are respectively welded and communicated with a cooling water inlet pipe. When the heat transferring unit body is assembled, the included angle between the plane where an insulation board arranged on the lower side of the heat transferring unit body and the horizontal plane is 15-45 degrees. Since the construction mode that the single-row assembly is welded firstly and the then the non-stick coating is sprayed, the construction method for the anti-bonding automatic-flow coke furnace raw gas waste heat recovery heat transfer unit not only can facilitate the uniform spraying of the anti-stick coating, but also avoid that the anti-stick coating is damaged by the high temperature and machineries when being welded.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery and utilization of raw gas in coking process, and more specifically relates to a construction method of a heat exchange unit for recovery of waste heat of raw gas in an anti-bonding artesian coke oven. Background technique [0002] At present, the energy consumption of the iron and steel industry is huge, and the waste heat recovery of coke oven waste gas is a major concern of iron and steel energy conservation work. It is the main energy-saving direction for building resource-saving and environmentally friendly green coking plants, and it is also one of the main ways to reduce coke oven energy consumption. . Judging from the distribution of heat loss in the coking process, the waste heat contained in raw coal gas accounts for about 36% of the total heat, which is equivalent to the sensible heat brought out by the red coke released from the carbonization chamber. It is recovered from t...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem in the prior art that components such as tar are easily bonded to the heat exchange device after condensation during waste heat recovery of raw coal gas in the prior art, and provide a heat exchange unit for recovery of waste heat from raw coal gas of an anti-bonding self-flowing coke oven The construction method effectively solves the problem that the tar on the surface of the heat exchange tube is easy to stick and coke in the process of waste heat recovery and utilization of coke oven waste gas, and recycles and utilizes the tar produced in the process of waste heat recovery and utilization of coke oven waste gas

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