Novel regeneration process for circulation oil of crude benzol device

Abstract

The invention discloses a novel method for regenerating crude benzole device cycle oil. The method adopts a flash distillation mode to carry out regeneration of cycle oil; a heating furnace is arranged in front of a regenerator, i.e. a flash tower; an indirect heating mode is adopted to raise the temperature of cycle regeneration feed oil which is fed in the regenerator from the upper part of the flash tower; after flash distillation and regeneration, light compositions in the tower top are cooled down by a top gas phase cooler and then are fed back to a cycle oil system by a pump, while heavy compositions in the bottom of the tower are discharged outside the system; the feeding capacity of regeneration oil is controlled to 1 to 2 percent of the circulating load of the cycle oil of the system; the feed temperature of the cycle regeneration oil at the outlet of the heating furnace is controlled to between 250 and 270 DEG C; the release viscosity of the heavy oil at the bottom of the regenerator is controlled to less than 7 (Engler viscosity); and the viscosity of the light oil at the top of the regenerator is controlled to between 1.0 and 1.2 (Engler viscosity). The method can effectively increase the regeneration efficiency of cycle oil and improves the quality of cycle oil.

Description

technical field [0001] The invention belongs to the technical field of coking, and specifically relates to a circulating oil regeneration method aimed at coke oven gas crude benzene absorption and distillation device circulating oil systems of coal chemical enterprises, which can improve the circulating oil regeneration efficiency and improve the circulating oil quality. Background technique [0002] In the refining process of coke oven gas in coking enterprises, in order to recover benzene, toluene, xylene and other chemical raw materials contained in the gas, crude benzene absorption and distillation devices are installed. Through a series of absorption and distillation processes, the final production Crude benzene raw materials mainly composed of benzene, toluene and xylene are produced. In the process of absorbing crude benzene, the gas is mainly absorbed by washing oil as raw material, which is converted into system circulating oil through regular replenishment into the...

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Problems solved by technology

[0005] Existing coking enterprises often have the problem of equipment blockage due to the low efficiency of the circulating oil regeneration system and the inability to effectively remove the degraded components in the circulating oil during the refining process of the coke oven gas.

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