Pre-coating filtering system capable of continuously operating for long period

Abstract

The invention discloses a pre-coating filtering system capable of continuously operating for a long period, and relates to the technical field of filtering devices. The system comprises a pre-coatingunit, an auxiliary unit and a filtering unit, the pre-coating unit comprises a pre-coating feeding device, a pre-coating tank and a pre-coating circulating pump, the auxiliary unit comprises an auxiliary feeding device, an auxiliary tank and an auxiliary pump, and the filtering unit comprises a blade type filter, a deslagging trolley and a filtrate tank; the pre-coating filtering system is furtherprovided with an oil slurry raw material valve, the blade type filter is provided with a filter shell and a plurality of sets of filter blades, and the filter blades are installed in the filter shell. The pre-coating filtering system is good in catalytic cracking slurry oil filtering effect, full automation and automatic filter switching can be achieved, solid impurities are prevented from blocking a filtering medium in a pre-coating mode before filtering, the service life of the filtering medium is greatly prolonged, and long-period continuous operation can be achieved.

Description

technical field [0001] The invention relates to the technical field of filtering devices, in particular to a long-period continuous operation pre-coating filtering system. Background technique [0002] The solid catalyst powder in the oil slurry is mainly fine crystal particles formed due to catalyst wear or thermal stress cracking under the high temperature and fluidization conditions of the catalytic cracking unit. These solid powders are highly dispersed in the oil slurry, and the solid content is about 3000-20000ppm. Due to the presence of impurities such as colloid, asphaltenes, sulfur, nitrogen and metal compounds in the oil slurry, which can promote and stabilize the dispersion of suspended particles, it is very difficult to separate the catalyst powder in the oil slurry. Due to the presence of solid impurities in the oil slurry, more solids not only intensify the erosion of pipelines and equipment, but also have the risk of blocking the furnace nozzle, which serious...

AI Technical Summary

Problems solved by technology

Moreover, because the particles in the oil slurry are relatively fine, and the particles below 1 micron account for 0.5-5%, it is difficult for the existing filtration technology to achieve higher filtration accuracy requirements

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