Delayed coking coke storage tank waste gas collection and circulation treatment method

Abstract

The invention discloses a delayed coking coke storage tank waste gas collection and circulation treatment method. Waste gas generated above a coke chute, above a coke tower top cover machine and at the top of a coke pool closed system is collected through a waste gas collection pipe network, then the waste gas is conveyed to an absorption tower in a centralized mode through a fan, and after water washing spraying, alkali washing spraying and demisting treatment are conducted in the absorption tower, the waste gas passes through a gas-liquid separator to be discharged into a coke pool closed system. Part of liquid drops and water vapor entrained in the waste gas are separated from the waste gas, the separated gas phase is divided into two paths for treatment, one path is sent to a heating furnace or an air blower inlet of a nearby heating furnace, a boiler and the like and enters the furnace for incineration treatment, and the other path is returned to a closed system through a pipeline for circulation; and the separated liquid phase flows back to the coke cooling tank for cyclic utilization. The method can effectively solve the problem of unorganized emission of delayed coking waste gas, has the characteristics of high safety, short construction period, low cost, stable operation, high automation degree, low maintenance cost and comprehensive design range, and does not influence the existing production process.

Description

technical field [0001] The invention belongs to the technical field of fugitive emission control and treatment of atmospheric pollutants, and in particular relates to a collection cycle treatment method for fugitive emission waste gas produced by delayed coking coke storage tanks in the petrochemical industry. Background technique [0002] The delayed coking process is a thermal cracking process that converts vacuum residue into lighter oil and coke; during the production process, the residual coke in the coke tower is discharged to the coke storage tank by high-pressure hydraulic coke cutting; the cut coke is combined with The coke cutting water is discharged into the coke storage pool, and the material is grabbed and the subsequent loading work is carried out through the top driving. [0003] Delayed coking is one of the main production processes of coking plants in my country's petrochemical industry. At present, most of them adopt open cold coking process, and the mixed ...

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Problems solved by technology

[0004] At present, the more effective solution in China is the closed decoking technology developed by Sinopec, which transforms all existing open pools and conveying equipment into closed equipment. Although this method can solve the problem of fugitive emission of waste gas, it is The reconstruction project requires a large amount of work, high investment costs, long renovation period, high system maintenance costs, and the particle size of coke powder produced after the renovation is too fine, which affects the product price to a certain extent, and is not accepted by most petrochemical plants in China.

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