A tube-bundle waste heat recovery system for anti-caking raw gas

Abstract

The invention discloses an anti-bonding pipe bundle type waste heat recycling system for raw coke oven gas, and belongs to the technical field of raw coke oven gas waste heat recycling in the coking technological process. The anti-bonding pipe bundle type waste heat recycling system for the raw coke oven gas comprises a lifting pipe, a pipe bundle heat exchange device and a special-shaped connecting pipe. A lifting pipe extending section is arranged at the top end of the lifting pipe in a vertically upward mode, and communicated with the special-shaped connecting pipe through the pipe bundle heat exchange device. No heat exchange device is arranged in the lifting pipe. The pipe bundle heat exchange device comprises a plurality of single-row assemblies arranged in parallel. The pipe bundle heat exchange device comprises a heat insulation box, an inlet of the insulation box is formed in the side face of the heat insulation box, an outlet of the heat insulation box is formed in the bottom face of the heat insulation box, the inlet and outlet of the heat insulation box are connected through an obliquely-arranged bottom heat insulation plate, and the bottom heat insulation plate is detachably fixed to the bottom face of the heat insulation box. According to the anti-bonding pipe bundle type waste heat recycling system, raw coke oven gas waste heat resources can be recycled more safely, economically and efficiently.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery and utilization of raw coal gas in the coking process, and more specifically relates to a tube-bundle waste heat recovery system for anti-bonding raw gas. Background technique [0002] At present, the sensible heat taken away by coke oven raw gas (650-750°C) accounts for about 36% of the coking heat supply, and a large amount of sensible heat is absorbed by the condensed ammonia water sprayed by the bridge tube. The recovery gas purification system not only consumes a large amount of ammonia water, increases the power consumption of the system, and deteriorates the operating environment of the coke oven, but also fails to recycle the sensible heat of the raw gas, resulting in energy waste, increasing the amount of coking wastewater produced and treated, and increasing environmental pollution and Processing costs. Therefore, the research on sensible heat recovery of raw coke oven gas h...

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Problems solved by technology

However, the deficiencies of this application are: (1) the riser superheater in this application has potential safety hazards such as dry pot bursting, which is also the "coke oven riser gasification cooling device" in the 1970s and 1980s. The failure of the application is the main reason for the stagnation of the development of gas waste heat recovery technology in the rising pipe; the superheater is installed in the rising pipe, once the heat exchange medium in the superheater leaks, it will inevitably affect the coke oven production, resulting in a high probability of production accidents (2) There is no reasonable solution to the problem of tar condensation and coking generated after the heat exchange of the bridge tube. More importantly, the space structure at the bridge tube is narrow, and the layout of the heating surface is affected, so it is impossible to fully recover the waste gas waste heat resources , making it difficult to promote

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