CN-122006544-A - Heterogeneous catalyst dissolving device

CN122006544ACN 122006544 ACN122006544 ACN 122006544ACN-122006544-A

Abstract

The invention relates to a heterogeneous catalyst dissolving device which comprises a tank body, a stirring structure, a guide plate and a filtering structure, wherein the tank body is provided with a tank body inlet and a tank body outlet, the stirring structure is arranged in the tank body and comprises stirring devices which are arranged differently along at least 3 sides, each stirring device is used for stirring solution in the tank body in a segmented mode to form different flow fields so as to promote stirring and dissolving of catalysts in the tank body, the guide plate is connected to the inner wall of the tank body, the solution stirred and rotated by the stirring structure collides with the guide plate and then flows downwards so as to stir, mix and dissolve the catalysts in the tank body again, and the filtering structure comprises a first filtering structure and a second filtering structure, the first filtering structure is arranged in the tank body, and the second filtering structure is arranged on the outer side of the tank body. The invention can enhance the backflow of the solution in the tank body by matching the guide plate and the sectional stirrer, is more uniform in mixing, can screen indissolvable or coarse catalyst particles by double filtration inside and outside the tank body, and can meet the requirement of uniform and efficient solubility in the catalyst dissolution process.

Inventors

CUI YUCHAO
JIANG ZEYU
HAN JIAQI
MIAO YUXIN
Ji Chengquan
SUN BINBIN
ZHAO XINGLONG
GE TENGJIE
WU WEI
JIANG YANFENG

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (12)

1. A heterogeneous catalyst dissolution apparatus, comprising: a tank providing space for heterogeneous catalyst dissolution, the tank having a tank inlet and a tank outlet; The stirring structure is arranged in the tank body and comprises at least 3 agitators which are arranged at intervals along the axial direction of the tank body and are arranged differently, wherein each agitator is used for sectionally agitating the solution in the tank body to form different flow fields so as to promote the stirring and dissolution of the catalyst in the tank body; The stirring structure is used for stirring the solution in the tank body, and the stirring structure is used for stirring the solution in the tank body; The filtering structure comprises a first filtering structure and a second filtering structure, wherein the first filtering structure and the second filtering structure are used for filtering solid particles in a solution, the first filtering structure is arranged in the tank body and is positioned above the stirring structure, and the second filtering structure is arranged on the outer side of the tank body and is communicated with the outlet of the tank body.
2. The heterogeneous catalyst dissolution apparatus according to claim 1, wherein the 3 stirrers include a propeller blade stirrer capable of rotating synchronously, a frame stirrer and a straight-blade disc turbine stirrer, the propeller blade stirrer is disposed below the first filter structure for eliminating bubbles on the liquid surface of the solution in the tank and forming vortex flow of the solution to be pushed downward, the frame stirrer is disposed below the propeller blade stirrer for rotating the solution to form axial flow, and the straight-blade disc turbine stirrer is disposed at the bottom end of the tank for liquid-solid suspension operation of the solution.
3. The heterogeneous catalyst dissolution apparatus according to claim 2, wherein the stirring structure includes a stirring shaft rotating from a top end of the tank body and penetrating in a sealed manner, the stirring shaft being located at a center of the tank body, and the propeller blade stirrer, the frame stirrer and the straight blade disc turbine stirrer are all connected to the stirring shaft.
4. A heterogeneous catalyst dissolution apparatus as claimed in claim 3, wherein a stirring motor is provided at the top end of the tank, and the stirring motor is connected to the top end of the stirring shaft to drive the stirring shaft to rotate.
5. The heterogeneous catalyst dissolution apparatus according to claim 3, wherein the propeller blade stirrer has an outer diameter of 1/3 to 2/3 of an inner diameter of the tank, and comprises a plurality of first blades having a hinge structure.
6. The heterogeneous catalyst dissolution apparatus according to claim 3, wherein the frame stirrer has an outer diameter of 1/3 to 2/3 of an inner diameter of the tank, and comprises a plurality of second blades having a vertical structure.
7. The heterogeneous catalyst dissolution apparatus of claim 3, wherein the first filter structure is coupled to the stirring shaft, and wherein the first filter structure comprises a removable multi-layer screen and an external jacket.
8. The heterogeneous catalyst dissolution apparatus according to claim 1, wherein the inlet of the tank is provided at the top end of the tank and is connected with a feed valve, and a bottom insertion pipe is connected to the feed valve and penetrates into the tank in a sealing manner, and the bottom insertion pipe is used for inputting a catalyst or a solvent for dissolution into the tank.
9. The heterogeneous catalyst dissolution apparatus according to claim 1, wherein a standby port capable of being opened and closed is provided at a top end of the tank.
10. The heterogeneous catalyst dissolution apparatus according to claim 1, wherein a pressure regulating valve is communicated to a top end of the tank, and the pressure regulating valve controls an opening degree according to a real-time pressure to maintain the pressure of the tank.
11. The heterogeneous catalyst dissolution apparatus of claim 1, wherein the tank outlet comprises a solution outlet disposed at a bottom end of the tank, the solution outlet is in communication with a liquid drain outlet line, and the liquid drain outlet line is in communication with the second filtering structure.
12. The heterogeneous catalyst dissolution apparatus according to claim 1, wherein the tank has a pressure resistance ranging from 1.5 to 5mpa and a temperature resistance ranging from-10 ℃ to 200 ℃.

Description

Heterogeneous catalyst dissolving device Technical Field The invention relates to the technical field of pretreatment equipment, in particular to a heterogeneous catalyst dissolving device. Background Polyolefin elastomer, POE for short, refers to a random copolymer elastomer polymerized by ethylene and high-carbon alpha-olefin by using a metallocene catalyst, and the elastomer has certain crystallinity, narrow relative molecular weight and lower density. The POE generally refers to an ethylene-octene copolymer elastomer with the mass fraction of octene being more than 20 percent, has good compatibility with polyolefin and high cost performance, and is widely applied to automobiles, shoe materials, wires and cables, packaging and polymer modification. Medical treatment, etc. In a small test or a pilot test of the polymerization reaction for producing POE, the olefin solution method needs to prepare the catalyst according to a certain proportion before the polymerization reaction, and meanwhile, the catalyst is dissolved in a solvent in a dissolving device, and the concentration of the catalyst solution is uniform through forced optimization and dissolution, so that the concentration of the catalyst entering a reaction kettle is ensured to be balanced, and the polymerization reaction is maintained stable. The design optimizes the design of a stirring paddle, so that the contact area between the stirring paddle and the solution is larger in the stirring process, other components of the equipment are not further optimized, the solubility of the raw materials is limited under the action of the stirring paddle, and the dissolving amount cannot be further improved. The solvent pretreatment tank comprises a tank body and a tank body arranged in the tank body, wherein a first partition plate and a second partition plate are sequentially and fixedly arranged in the tank body from top to bottom, a top cover is fixedly arranged at the top of the tank body, a feed hopper is fixedly arranged at the top of the top cover, a first filter screen is fixedly arranged in the feed hopper, a discharging pipe is fixedly arranged at the bottom of the tank body, and a second filter screen is fixedly arranged below the second partition plate in the tank body. The technology has the defect that when the impurities in the solution are excessive, the discharge is not facilitated. The whitening agent dissolving device comprises a tank body, a pre-dissolving barrel, a feeding mechanism and a stirring mechanism, and has the defects that a clear stirring device, a temperature control system and feeding and discharging problems are not available, a certain gap is reserved between the whitening agent dissolving device and an industrial production device, and the actual activity of a catalyst cannot be reacted. Thus, the present inventors have developed a heterogeneous catalyst dissolution apparatus to overcome the drawbacks of the prior art by years of experience and practice in the relevant industries. Disclosure of Invention The invention aims to provide a heterogeneous catalyst dissolving device, which solves the problems in the prior art, the baffle plate and the sectional stirrer are matched, so that the backflow of solution in a tank body can be enhanced, the mixing is more uniform, the double filtration in the tank body and the outside of the tank body can remove indissolvable or coarse catalyst particles, the requirement of uniform and efficient solubility in the catalyst dissolving process can be met, and the heterogeneous catalyst dissolving device has important significance for the design of a solution polymerization process and the development of a metallocene heterogeneous catalyst. The object of the invention is achieved in that a heterogeneous catalyst dissolution apparatus comprises: a tank providing space for heterogeneous catalyst dissolution, the tank having a tank inlet and a tank outlet; The stirring structure is arranged in the tank body and comprises at least 3 agitators which are arranged at intervals along the axial direction of the tank body and are arranged differently, wherein each agitator is used for sectionally agitating the solution in the tank body to form different flow fields so as to promote the stirring and dissolution of the catalyst in the tank body; The stirring structure is used for stirring the solution in the tank body, and the stirring structure is used for stirring the solution in the tank body; The filter structure comprises a first filter structure and a second filter structure, wherein the first filter structure and the second filter structure are used for filtering solid particles (catalyst, impurities and the like which cannot be dissolved in a solvent) in a solution, the first filter structure is arranged in the tank body and is positioned above the stirring structure, and the second filter structure is arranged on the outer side of the tank body and is communicated with the outlet of the ta