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System and method for washing polyolefin

A polyolefin and washing tower technology, applied in the field of washing polyolefin systems, can solve the problems of unsatisfactory washing effect and achieve the effect of simple structure, easy implementation and improved washing efficiency

Active Publication Date: 2022-02-08
金聚合科技(宁波)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, pure liquid phase washing, unless strong stirring is used, the washing effect is not satisfactory.

Method used

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  • System and method for washing polyolefin
  • System and method for washing polyolefin
  • System and method for washing polyolefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] like Figure 1~2 Shown is a preferred embodiment 1 of a system and method for washing polyolefins of the present invention, the system includes a liquid phase washing device 1, an impurity separation device 3, a degassing device 4, and a first liquefaction pressurization device 5 , the second liquefaction pressurization device 2, the replenishment pipeline 100, the membrane separation module 6, the first heater 71, and the fourth heater 74.

[0056] Wherein, the liquid-phase washing device 1 is used to wash the circulating working medium with the polyolefin in the liquid phase state. The liquid-phase washing device 1 is a liquid-phase washing tower, and the upper part of the liquid-phase washing tower has a The washing inlet 11, the lower part has the circulating working fluid inlet 12 for the circulating working fluid to enter, the bottom has the washing outlet 13 for the output of the washed polyolefin, and the top has a washing circulating working fluid and the outpu...

Embodiment 2

[0072] like image 3 Shown is a preferred embodiment 2 of a system and method for washing polyolefins of the present invention, the system includes a liquid phase washing device 1, an impurity separation device 3, a degassing device 4, and a first liquefaction pressurization device 5 , the second liquefaction pressurization device 2 , the supply line 100 , the membrane separation module 6 , the first heater 71 , and the fourth heater 74 .

[0073] Wherein, the liquid-phase washing device 1 is used to wash the circulating working medium with the polyolefin in the liquid phase state. The liquid-phase washing device 1 is a liquid-phase washing tower, and the upper part of the liquid-phase washing tower has a The washing inlet 11, the lower part has the circulating working fluid inlet 12 for the circulating working fluid to enter, the bottom has the washing outlet 13 for the output of the washed polyolefin, and the top has a washing circulating working fluid and the output of impu...

Embodiment 3

[0085] like Figure 4 Shown is a preferred embodiment three of a system and method for washing polyolefins of the present invention, the system includes a liquid phase washing device 1, an impurity separation device 3, a degassing device 4, and a first liquefaction pressurization device 5 , the second hydraulic pressurizing device 2 , the replenishment pipeline 100 , the first heater 71 , the fourth heater 74 , the flash condenser 8 , and the temperature and pressure reduction tower 9 .

[0086] Wherein, the liquid-phase washing device 1 is used to wash the circulating working medium with the polyolefin in the liquid phase state. The liquid-phase washing device 1 is a liquid-phase washing tower, and the upper part of the liquid-phase washing tower has a The washing inlet 11, the lower part has the circulating working fluid inlet 12 for the circulating working fluid to enter, the bottom has the washing outlet 13 for the output of the washed polyolefin, and the top has a washing...

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Abstract

The invention relates to a system for washing polyolefin, comprising: a liquid phase washing device (1) used for washing polyolefin with a circulating working medium in a liquid phase state, an impurity separating device (3) used for vaporizing the circulating working medium after washing and separating impurities and the gas-phase circulating working medium, a degassing device (4) used for removing the residual circulating working medium and impurities on the washed polyolefin, and a first liquefying and pressurizing device (5) and a second liquefying and pressurizing device (2) used for liquefying and pressurizing the gas-phase circulating working medium. The liquid-phase washing device (1) or / and the impurity separating device (3) or / and the degassing device (4) is provided with a chemical reagent inlet(s) (46) for enabling a chemical reagent which chemically reacts with the impurities to enter. The invention also discloses a method for washing polyolefin by adopting the system. Compared with the prior art, a polyolefin washing product with low ash content and low chlorine content can be obtained.

Description

technical field [0001] The invention belongs to the technical field of polymer preparation, and in particular relates to a system and method for washing polyolefin. Background technique [0002] Polyolefin has the advantages of low relative density, good chemical resistance and water resistance, as well as good mechanical strength and electrical insulation. It can be used in films, pipes, plates, various molded products, wires and cables, etc., in agriculture , packaging, electronics, electrical, automobiles, machinery, daily sundries, etc. have a wide range of uses. [0003] Although the self-sufficiency rate of polyolefins in my country has been increasing year by year, the foundation of high-end products is weak and it still relies heavily on imports. The current domestic self-sufficiency rate of high-end / high-performance polyolefins is only 38%. High-performance materials include metallocene series polyolefin elastomers, high-rigidity and high-impact copolymer polypropy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/06B01D19/00B01D61/00C08F6/00C08F10/00
CPCB01D3/06B01D19/00B01D61/00C08F6/005C08F6/00C08L23/00Y02W30/62
Inventor 徐小武
Owner 金聚合科技(宁波)有限公司