Device for removing solids and method for removing solids in catalytic cracking oil slurry

Abstract

The invention relates to the technical field of oil slurry purification treatment and provides a solid matter removal device and a method for removing catalytic cracking oil slurry solid matter. The solid matter removing device includes an electrostatic separation tank, wherein the electrostatic separation tank is internally provided with an electrostatic coalescence layer and an electrostatic adsorption layer, and the electrostatic coalescence layer is located below the electrostatic adsorption layer. According to the method for removing catalytic cracking oil slurry solid matter, heat-exchanged catalytic cracking oil slurry is introduced into the solid matter removing device and is subjected to solid removal treatment, and purified oil slurry and heavy oil slurry are obtained. A part ofsolid particles is pre-removed by electric field coalescence pretreatment and then is subjected to advanced treatment under an electrostatic adsorption effect, it can be achieved that the oil slurry directly enters an electrostatic adsorption zone for treatment after electrostatic coalescence, and accordingly stepwise removal of the solid particles is achieved. The redispersion of solid particlesdue to fluid flowing can be effectively avoided, the separation efficiency and treatment capacity of the device are improved, and large-scale industrial continuous production is facilitated.

Description

technical field [0001] The invention relates to the technical field of oil slurry purification treatment, in particular to a device for removing solids and a method for removing solids in catalytic cracking oil slurry. Background technique [0002] Catalytic cracking oil slurry is a by-product of the catalytic cracking (FCC) process, and its utilization is greatly limited due to its high content of solid particles (mainly catalyst particles and metal ions). Currently, most refineries sell FCC slurry as a blending component for heavy fuel oil. When the catalytic cracking oil slurry is used as fuel oil, it will cause many problems such as the wear of the furnace nozzle and the accumulation of dust on the surface of the furnace tube, which will affect the smooth operation of the furnace. Moreover, the use of catalytic oil slurry as fuel oil greatly reduces the utilization value of catalytic oil slurry. Catalytic cracking oil slurry contains a large amount of polycyclic aromat...

AI Technical Summary

Problems solved by technology

Compared with foreign countries, the raw material of catalytic cracking in domestic refineries is usually wax oil and a certain proportion of vacuum residue will be refined. The raw material properties are poor, resulting in a high content of solid particles and polar components in the oil slurry. Foreign electrostatic separation technology will inevitably lead to poor separation effect, and the equipment cannot run stably for a long period of time

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