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Device and method for removing volatile matter from polymer powder

A technology of polymer and volatile matter, which is applied in the field of polyolefin production equipment, can solve the problems of complex operation process and inability to guarantee the drying of polymer powder, and achieve the effects of improving devolatilization efficiency, keeping dryness and reducing product odor

Active Publication Date: 2019-05-03
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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  • Device and method for removing volatile matter from polymer powder
  • Device and method for removing volatile matter from polymer powder
  • Device and method for removing volatile matter from polymer powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] like figure 1 As shown, the device for removing volatile matter in the polymer powder includes a 300L intermediate storage tank and a 600L devolatilization tank. The pressure of the intermediate storage tank is 0.7MPa, and 30kg of polymer is stored. Keep it at 0.5MPa, and the temperature of the heat tracing insulation layer on the outer wall is 80°C. The hot nitrogen and steam are passed into the devolatilization tank at the same time, the temperature of the hot nitrogen is 100°C, and the flow rate is 60m 3 / h; the temperature of the steam is 160°C, and the flow rate is 5m 3 / h, the access time is 10min.

[0070] like image 3 The distribution plate in the devolatilization tank is shown as a direct current type. The two ends of the support shaft are connected with the rotating shaft in a keyed connection and supported by the container wall. One end is connected to the motor and controlled by a remote control unit. The control room is operated, and the seal between t...

Embodiment 2

[0073] like figure 2 As shown, the device for removing volatile matter in the polymer powder includes a 120L intermediate storage tank and a 300L devolatilization tank. The pressure of the intermediate storage tank is 0.5MPa, and 12kg of polymer is stored. Keep at 0.3MPa, there is paddle stirring inside, the rotation speed is 60r / h, and the temperature of the heat tracing insulation layer on the outer wall is 100°C. The hot nitrogen and steam are passed into the devolatilization tank at the same time, the temperature of the hot nitrogen is 80°C, and the flow rate is 35m 3 / h, the temperature of the steam is 160°C, and the flow rate is 1m 3 / h, the access time is 10min.

[0074] like image 3 The distribution plate in the devolatilization tank is shown as a direct current type. The two ends of the support shaft are connected to the rotating shaft in a pin connection and supported by the container wall. One end is connected to the motor and controlled by a remote control uni...

Embodiment 3

[0077] like figure 1 As shown, the device for removing volatile matter in the polymer powder includes a 300L intermediate storage tank and a 600L devolatilization tank. The pressure of the intermediate storage tank is 0.7MPa, and 35kg of polymer is stored. Keep it at 0.7MPa, and the temperature of the heat tracing insulation layer on the outer wall is 30°C. The hot nitrogen and steam are passed into the devolatilization tank at the same time, the temperature of the hot nitrogen is 90°C, and the flow rate is 100m 3 / h; the temperature of the steam is 160°C and the flow rate is 20m 3 / h, the access time is 30min.

[0078] like image 3 The distribution plate in the devolatilization tank is shown as a direct current type. The two ends of the support shaft are connected with the rotating shaft in a keyed connection and supported by the container wall. One end is connected to the motor and controlled by a remote control unit. The control room is operated, and the seal between th...

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Abstract

The present invention discloses an apparatus and a method for removing volatile components from polymer powder. According to the present invention, the apparatus and the method can be used for polyolefin production apparatuses; a volatile component removing tank is a fluidized bed container provided with a distribution plate, the volatile component removing apparatus makes a polymer completely contact mixed gas of hot nitrogen and steam by using the principle of the fluidized bed, and the volatile components are removed by the vented gas flow so as to improve the volatile component removing efficiency; and with the apparatus, the ratio of the hot nitrogen to the steam can be adjusted while the drying of the polymer powder can be maintained.

Description

technical field [0001] The invention relates to a device and method for removing volatile matter in polymer powder. The device operates intermittently and is applicable to 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 c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F6/00
Inventor 郭峰杨国兴赵兴龙王登飞王熺高宇新宋磊赵成才王斯晗姜进宪苑俊杰吕红丽李明全邹丹孙彬彬国海峰李瑞杨琦刘丽军杜威任合刚魏静侯裕厅于秀娟
Owner PETROCHINA CO LTD
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