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Method and device for drying polymer

A drying method and polymer technology, which is applied in the field of polymer drying and devices, can solve problems such as blocked pipes, and achieve the effects of avoiding dust explosion, improving drying efficiency, and reducing energy consumption

Active Publication Date: 2012-02-29
CHINA NAT BLUESTAR (GRP) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Moreover, the present invention utilizes circulating inert gas to dry polymer powder, which can not only avoid dust explosion, but also solve the problem of bridging and blocking pipelines caused by polymer powder particles by pressurizing the rotary lock

Method used

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  • Method and device for drying polymer
  • Method and device for drying polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, the washed and filtered polyphenylene ether containing 60% solid content, 40% methanol, and toluene is pushed by the screw propeller 1 to enter the dryer 2 from the feed port A of the dryer, wherein The jacket of the dryer is heated to 190°C by the first-stage heating H3, the second-stage heating H2 is heated to 130°C, and the third-stage heating H1 is heated to 100°C. When the polyphenylene ether is pushed forward by the hollow paddle propeller, at the same time The high-temperature circulating nitrogen is heated to 180°C through the heat exchanger 7, and then pressurized by the fan 8 and enters the F port of the dryer. The circulating nitrogen entrains the organic solvent methanol in the dryer. After the device 5 is cooled, it enters the gas-liquid separation tank 6 for separation. The nitrogen gas comes out from the top of the separation tank, passes through the heat exchanger 7 and enters the dryer again, and the nitrogen replenishment pip...

Embodiment 2

[0038] Such as figure 1 As shown, the washed and filtered polyphenylene ether containing 60% solid content, 40% methanol, and toluene is pushed by the screw propeller 1 to enter the dryer 2 from the feed port A of the dryer, wherein The jacket of the dryer is heated to 190°C by the first-stage heating H3, the second-stage heating H2 is heated to 130°C, and the third-stage heating H1 is heated to 100°C. When the polyphenylene ether is pushed forward by the screw propeller, the high temperature cycle The nitrogen gas is heated to 180°C through the heat exchanger 7, and then pressurized by the fan 8 and enters the F port of the dryer. The circulating nitrogen gas entrains the organic solvent methanol in the dryer, and the toluene comes out from the exhaust port E of the dryer and passes through the heat exchanger 5. After cooling, it enters the gas-liquid separation tank 6 for separation. Nitrogen gas comes out from the top of the separation tank, passes through the heat exchange...

Embodiment 3

[0040] Such as figure 1 As shown, the polyphenylene ether containing 70% solid content after washing and filtering, containing 30% methanol, and toluene is pushed by the screw propeller 1 to enter the dryer 2 from the feed port A of the dryer, wherein The jacket of the dryer is heated to 190°C by the first-stage heating H3, the second-stage heating H2 is heated to 120°C, and the third-stage heating H1 is heated to 90°C. When the polyphenylene ether is pushed forward by the hollow paddle propeller, at the same time The high-temperature circulating nitrogen is heated to 170°C through the heat exchanger 7, and then pressurized by the fan 8 and enters the F port of the dryer. The circulating nitrogen entrains the organic solvent methanol in the dryer. After the device 5 is cooled, it enters the gas-liquid separation tank 6 for separation. The nitrogen gas comes out from the top of the separation tank, passes through the heat exchanger 7 and enters the dryer again, and the nitrogen...

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Abstract

The invention relates to a method and a device for drying a polymer, which are used for drying removal of an organic solvent contained in the polymer obtained through oxidative coupling. The method and the device use a high-temperature circulating inert gas to dry the polymer sectionally heated by gradient temperatures and uses a low-pressure circulating inert gas to accelerate the dried polymer to enter a storage bin. The method and the device for drying the polymer not only can avoid dust explosions and simultaneously solve the problem of pipeline blockage caused by bridge formation of powder particles of the polymer, but also have the advantages of low production cost, relatively simple process, less equipment investment and easy continuous production.

Description

technical field [0001] The invention relates to a drying method and device for polymer powder obtained through oxidative coupling. In particular, it involves the use of a dryer and the use of circulating nitrogen to dry the organic solvent in the polyphenylene ether powder, and the circulation of nitrogen is used to pressurize the rotary lock, so that the polyphenylene ether powder can flow smoothly to the silo, effectively preventing the polyphenylene ether from drying out. bridge approach. Background technique [0002] The oxidative coupling method refers to the method in which the compound with active hydrogen undergoes an oxidation reaction under the action of an oxidation catalyst, dehydrogenates and couples to form a polymer, also known as dehydrogenation polycondensation. Compounds such as phenols, acetylenes, aromatic amines, aromatic hydrocarbons, and mercaptans can be polymerized by oxidative coupling to form polymers. Among them, the most representative one belo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/46
Inventor 王海军刘宇辉高岱魏张洪波李瑞亢胡衍平
Owner CHINA NAT BLUESTAR (GRP) CO LTD
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