A treatment method for desolidification of catalytic cracking oil slurry

Abstract

The invention provides a treatment method for removing solids from catalytic cracking oil slurry. The treatment method comprises the following steps: the catalytic cracking oil slurry is pretreated under the action of a modifier; the pretreated oil slurry is destabilized and coalesced under the action of a coalescence aid; The treated oil slurry is centrifuged to obtain clarified oil slurry and additive waste liquid; complete the desolidification treatment of catalytic cracking oil slurry. The ash content of the clarified oil slurry separated by the treatment method of the invention is less than 0.01%, and the deashing rate of the oil slurry exceeds 97%.

Description

technical field [0001] The invention relates to a treatment method for desolidification of catalytic cracking oil slurry, which belongs to the technical field of petrochemical industry. Background technique [0002] In the production of petroleum catalytic cracking, the industry generally adopts the method of throwing oil slurry to ensure a higher production load and a longer operation period of the catalytic cracking unit. The oil slurry produced in this production process accounts for about 5% of the catalytic raw material.- 10%, its composition is complex, its stability is relatively poor, its utilization channels are few, and its added value is low. This is because the oil slurry not only contains many catalyst solid particles, but also the metal impurities in the raw material will be adsorbed on the catalyst during the catalytic cracking process. At present, many domestic oil refineries use it as a blending component of marine fuel oil, but the solid particles in the c...

AI Technical Summary

Problems solved by technology

[0005] 1) Natural sedimentation method, which takes a long time to settle, occupies a large area, and has low separation efficiency, especially for particles smaller than 20 μm, it is difficult to undergo natural sedimentation, and it is difficult to meet the requirements of deep processing, so it is rarely used in actual production

[0006] 2) Mechanical filtration method, although the cost of this method is relatively low and the operation is simple, but the processing capacity is less flexible, the operation cycle is short, the service life of the filter is short, and the operation and maintenance costs are high

[0007] 3) Electrostatic separation method, which is easy to operate and can remove particles with small diameters, but the investment in equipment is large, and the surface of some parts will inevitably be covered with oil during the treatment process, which will affect the treatment effect

[0008] 4) Chemical additive sedimentation method, which has simple process and relatively low cost, but also faces the problem of long sedimentation time

It can be seen that the processing time of the chemical additive sedimentation method is still long, which affects the processing capacity and processing efficiency, and has certain requirements for the processing temperature, and has a tortuous process of heating and cooling, which is not conducive to energy saving

Images