Coking inhibitor

Abstract

The invention provides a coking inhibitor capable of retarding the coking of a furnace tube, filler and a heat exchanger in the distillation process of waste oil and effectively prolonging the on-stream time. The coking inhibitor is fully utilized to soften coke blocks, inhibit condensation and polymerization of condensed aromatics, and prevent or reduce the formation of coking materials; after the product is added in the atmospheric and vacuum distillation process, an acid value is effectively reduced and acid corrosion of equipment is controlled; the coking speed is greatly reduced, and theon-stream time is prolonged, i.e., monthly maintenance is prolonged to three-month maintenance once, so that production days are increased, the input of maintenance cost is reduced and direct economicbenefits are brought for a factory.

Description

technical field [0001] The invention relates to the technical field of waste oil regeneration, in particular to a coking inhibitor capable of delaying the coking of furnace tubes, fillers and heat exchangers in the waste oil distillation process and effectively prolonging the start-up period. Background technique [0002] Delayed coking, as a deep processing technology of residual oil, plays an important role in China's oil refining industry. With the increasingly heavy and inferior crude oil in the world, the oil processing conditions have become more stringent, and the problem of coking in refining equipment and pipelines has become increasingly prominent. In today's waste oil regeneration field, if the atmospheric and vacuum distillation process is used, it is impossible to avoid the coking of the furnace tube, packing, heat exchanger and other parts, which will cause the pressure to rise and eventually block, so that the problem has to be shut down for maintenance. In p...

AI Technical Summary

Problems solved by technology

In today's waste oil regeneration field, if the atmospheric and vacuum distillation process is used, it is impossible to avoid the coking of furnace tubes, fillers, heat exchangers and other parts, which will lead to pressure rise and eventually blockage, so that the problem has to be shut down for maintenance

In particular, the inferior quality of raw oil in the delayed coking unit makes the heating furnace tubes very easy to coke, reduces the thermal efficiency of the heating furnace, and sometimes blocks the pipes, which not only shortens the operating cycle of the device, but also brings hidden dangers to the safety of the device, seriously affecting the device. normal production

[0003] Almost all atmospheric and decompression plants in China have a start-up period of about one month, frequent maintenance affects normal production, reduces the total number of annual production days, and the maintenance process is expensive

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