Solid-liquid separation device for oil slurry and solid-liquid separation system for oil slurry

Abstract

The invention provides a solid-liquid separation device for oil slurry and a solid-liquid separation system for oil slurry. The solid-liquid separation device for oil slurry comprises at least one mixer, at least one first-level separator and at least one second-level filter; the first-level separator is communicated with each mixer; the second-level filter is communicated with each first-level separator. Different from a traditional single filtering and separating technology, the invention adopts the first-level separation and the second-level filtering, so that the solid-liquid separation device for oil slurry can meet the requirement of long-period stable work.

Description

technical field [0001] The invention belongs to the field of solid-liquid separation of oil slurry thrown outside a catalytic cracking unit, and relates to a combined process for solid-liquid separation of oil slurry thrown outside a catalytic cracking unit, in particular, to an oil slurry solid-liquid separation device and an oil slurry solid-liquid separation The separation system is especially effective for oil slurries containing colloids and asphaltenes. Background technique [0002] In my country, catalytic cracking units generally blend vacuum residue or atmospheric heavy oil, both of which belong to heavy oil catalytic cracking. In recent years, although the catalytic cracking process faces the competition of hydrocracking, it is still the main means of lightening heavy oil and an important way for refineries to obtain economic benefits. In recent years, due to the heavy weight of raw materials and the increase in the proportion of slagging in refineries, the proces...

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Problems solved by technology

[0005] For example, the patent No. CN201010577004.8 discloses a device and method for separating residues from catalytic cracking oil slurry, using multiple filter groups; for example, the patent No. CN201210530805.8 discloses a catalytic cracking device The oil slurry filtration system has different technological processes, but both stages use filtration; among them, the latter explains the two-stage filtration mechanism more deeply, but there is no essential difference

As the catalytic cracking oil slurry presents the characteristics of inferior and heavy quality, the existing single filtration separation process is difficult to meet the long-term stable work

For example, the patent No. CN201020213529.9 discloses the catalytic cracking oil slurry filtration equipment and mentions the use of cross-flow filters, which still rely on filtration technology. According to the industrial operation situation, it is still difficult to meet the requirements of long-term stable work.

The patent No. CN201120188596.4 jointly declared by China University of Petroleum and SEI discloses a continuous filtration device for catalytic oil slurry and the patent No. CN201120188613.4 discloses a kind of catalytic oil slurry filtration device. Both of them refer to the combination of swirling flow and filtration process, but no major technical improvements to swirling and filtration

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