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Polymer powder volatile component removing apparatus and polymer powder volatile component removing method

A devolatilization device and polymer powder technology, which is applied in the field of polyolefin production devices, can solve the problems of inability to guarantee the drying of polymer powder and complicated operation process, and achieve the effect of short process, simple process and efficient removal

Inactive Publication Date: 2017-02-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the operation process is complicated, and at the same time, the drying of the polymerized powder cannot be guaranteed.

Method used

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  • Polymer powder volatile component removing apparatus and polymer powder volatile component removing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as figure 1 As shown, the polymer powder devolatilization device is a 0.5m horizontal stirring 3 Constant pressure vessel, the control pressure is 0.2MPa, the agitator is a ribbon type, and the set speed is 5r / h; the proportion of steam in the mixed gas is 100%, and the steam is evenly dispersed from the bottom of the devolatilization device near the side of the stirring actuator Enter, fully contact with the polymer powder entering from the top of the devolatilization device close to the side of the stirring actuator to form a fully mixed flow state; the polymer powder is transported to the other side of the horizontal container through the continuously running stirring paddle, and polymerized The residence time of the polymer powder in the devolatilization device is 60min; the gas is filtered through the filter on the top side away from the stirring actuator and then emptied, and the devolatilized polymer powder is discharged from the devolatilization device from...

Embodiment 2

[0051] Such as figure 1 As shown, the polymer powder devolatilization device is a 0.5m horizontal stirring 3 Constant pressure vessel, the control pressure is 0.3MPa, the agitator is ribbon type, the set speed is 60r / h; the proportion of steam in the mixed gas is 5%, the temperature of hot nitrogen is 80°C, the mixed gas of hot nitrogen and steam Evenly disperse and enter from the side of the bottom of the devolatilization device close to the stirring actuator, and fully contact with the polymer powder entering from the top of the devolatilization device near the side of the stirring actuator to form a fully mixed flow state; The polymer powder is transported to the other side of the horizontal container, and the residence time of the polymer powder in the devolatilization device is 30 minutes; the gas is filtered through the filter on the side away from the stirring actuator at the top and then emptied, and the polymer powder after devolatilization The material is discharged...

Embodiment 3

[0053] Such as figure 1 As shown, the polymer powder devolatilization device is a 0.5m horizontal stirring 3 Constant pressure vessel, the control pressure is 0.7MPa, the agitator is a ribbon type, the set speed is 300r / h; the proportion of steam in the mixed gas is 0%, the temperature of the hot nitrogen is 100°C, and the hot nitrogen is from the bottom of the devolatilization device The side close to the stirring actuator is uniformly dispersed and enters, and fully contacts with the polymer powder entering from the top of the devolatilization device close to the stirring actuator to form a fully mixed flow state; the polymer powder is transported to the On the other side of the horizontal container, the residence time of the polymer powder in the devolatilization device is 5 minutes; the gas is filtered through the filter on the side away from the stirring actuator at the top and then emptied, and the devolatilized polymer powder is away from the stirring from the bottom T...

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Abstract

The invention relates to a polymer powder volatile component removing apparatus, which comprises a gas phase full mixing flow container having a horizontal stirrer, and a filter, wherein the gas a stirring implementing mechanism is arranged at the center axis line position of the left side of the gas phase full mixing flow container, the gas phase full mixing flow container top portion side away from the stirring implementing mechanism is provided with the filter, the gas phase full mixing flow container top portion side close to the stirring implementing mechanism is provided with a material inlet, the gas phase full mixing flow container bottom portion side away from the stirring implementing mechanism is provided with a material discharging port, and the bottom portion of the gas phase full mixing flow container is provided with uniformly distributed holes. The invention further relates to a polymer powder volatile component removing method, wherein polymer powder enters the volatile component removing apparatus from the volatile component removing apparatus top portion side close to the stirring implementing mechanism, the mixed gas of hot nitrogen and steam uniformly enters from the bottom portion of the volatile component removing apparatus in a dispersed manner, the polymer completely contacts the mixed gas, volatile component removing is performed, the gas is filtered through the filter on the gas phase full mixing flow container top portion side away from the stirring implementing mechanism and then is vented, and the polymer is discharged from the bottom portion side away from the stirring implementing mechanism.

Description

technical field [0001] The invention relates to a device and method for devolatilization of polymer powder, which is suitable for polyolefin production devices. Background technique [0002] In the polymerization reaction, depending on the process and physical properties, the polymerization product will be in different states, among which the polymer is typically discharged from the reactor in the form of solid powder, such as the gas phase polyolefin process. When the solid polymer is discharged from the reactor, a small amount of undeactivated catalyst and unreacted monomers often remain in the polymer powder, and these impurities must be removed in the degassing and drying system to ensure the downstream The safety of device operation and the safety of storage and transportation of polyolefin products minimize the consumption of comonomers and reduce product odor. [0003] The above process of removing hydrocarbons is generally called degassing or devolatilization, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F6/00
Inventor 赵兴龙刘丽军郭峰杨国兴王熺高宇新宋磊王斯晗姜进宪邹丹吕红丽李瑞孙彬彬国海峰王登飞李明全侯裕厅马克存马英穆秀玲杨琦任合刚姜雪峰郝志军郝丹王丹李艳秋周剑锋
Owner PETROCHINA CO LTD
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