High temperature resistant defoamer for delaying coking reaction tower

Abstract

The invention relates to high temperature resistant defoamer for delaying a coking reaction tower, which comprises the following components: 20 percent to 50 percent of a modified polysiloxane compound, 10 percent to 30 percent of phenyl silicone oil, 30 percent to 70 percent of organic solvent, and the proportion is mass percentage. The high temperature resistant defoamer for delaying the coking reaction tower is mainly used for delaying the coking reaction tower, can effectively suppress and eliminate the foam in the coking tower and prolong the coke producing time, so that the utilization rate of the coking tower is improved, particularly the yield of light oil is improved, and the production energy consumption of the device is significantly reduced.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a defoamer, in particular to a high-temperature-resistant defoamer used for suppressing and eliminating foam layers in delayed coking coke towers of oil refineries. Background technique [0002] Delayed coking is that the residual oil passes through the heating furnace tube at a high speed at a high temperature and enters the reactor for reaction, so that the condensation reaction and cracking reaction in the residual oil are delayed to the coke tower. The raw material residue contains natural surfactant, which makes the material in the coke tower produce a stable foam layer, which will have many adverse effects on the operation of the coke tower; the foam will entrain the material into the pipeline before the fractionation tower, causing Coking, even clogging, requires regular decoking, reducing the operating cycle. The excessively high foam layer also occupies the effective ...

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Problems solved by technology

The disadvantage is that the silicon content of the product is too high, which has a great impact on the downstream hydrotreating unit

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