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A high-viscosity polymer polycondensation reactor based on a combined stirring mechanism

A technology of polycondensation reactor and stirring mechanism, which is applied in chemical/physical/physicochemical stationary reactors, mixers with rotating stirring devices, mixers, etc., which can solve the problem of longer production process, increased investment costs and production costs , lengthening of residence time, etc., to achieve the effect of mixing, increasing production capacity and product range

Active Publication Date: 2021-11-30
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, when the polymer liquid film and the annular disc form a whole to rotate together, the flow of the subsequent polymer is blocked, and the surface renewal and polymerization reaction of the subsequent polymer are also restricted, so that the viscosity of the subsequent polymer cannot be further increased.
Therefore, when using the traditional disc reactor to produce polymers with higher viscosity, we can only add another set of viscosifying reactors, which makes the production process longer, and the residence time of the polymer at high temperature is prolonged, which affects the quality of the final product. quality, increased investment costs and production costs

Method used

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  • A high-viscosity polymer polycondensation reactor based on a combined stirring mechanism
  • A high-viscosity polymer polycondensation reactor based on a combined stirring mechanism
  • A high-viscosity polymer polycondensation reactor based on a combined stirring mechanism

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Experimental program
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Effect test

Embodiment 1

[0074] Embodiment 1 (ring disc stirrer+spiral blade stirrer)

[0075] Such as figure 1 As shown, a high-viscosity polymer polycondensation reactor includes a horizontal cylindrical shell and a combined stirring mechanism located in the horizontal cylindrical shell. The bottom ends of the horizontal cylindrical shell are respectively equipped with feed Port 1 and discharge port 2, and a gas phase port 3 is also provided on the side of the discharge port on the horizontal cylindrical shell. The horizontal cylindrical shell includes an inner cylinder 18, a jacket cylinder 19 (which can be heated by a heat medium) arranged on the outside of the inner cylinder, and end caps 20 arranged at both ends of the inner cylinder and the jacket cylinder; The end cover is provided with a rotating shaft sleeve 21 for sealing and supporting the rotating shaft. The cross section of the inner cylinder is circular, and the centerline of the combined stirring mechanism is lower than the centerlin...

Embodiment 2

[0081] Embodiment 2 (cage frame type mesh pan stirrer + helical blade type tube pan stirrer)

[0082] The difference between this embodiment and embodiment 1 is:

[0083] The cross-section of the inner cylinder is a shape formed by connecting the upper and lower sides of a rectangle with a semicircle of the same radius, and the centerline of the combined stirring mechanism is concentric with the centerline of the lower semicircle in the cross-section of the inner cylinder.

[0084] Such as Figure 5-6 As shown, the first agitator is a cage-type network pan agitator including two circular flower plates 10, several strips 11, several net pans 12, inner short shaft 13 and outer short shaft 14; Parallel to the axial direction of the horizontal cylindrical shell, the two circular flower plates are vertically fixed to the two ends of the slats respectively, and the network disks are vertically fixed on the axial direction of the slats in series, and the circular flower plates Plat...

Embodiment 3

[0086] Embodiment 3 (ring disc stirrer+spiral ring tube stirrer)

[0087] The difference between this embodiment and embodiment 1 is that the second agitator is a helical loop agitator. Such as Figure 7-9 As shown, the spiral ring tube agitator includes a second rotating shaft 4 and a spiral ring tube 5b axially fixed on the second rotating shaft; It consists of different spirals 51b; the two ends of the second rotating shaft are respectively supported by the rotating shaft sleeve 21 fixed on the discharge side end cover 20 of the cylindrical shell and the sliding bearing seat 16 inside the cylinder. A shaft sleeve 53 is arranged on the second rotating shaft, and the spiral ring is fixed on the shaft sleeve through a plurality of support bars 52 . The length of the spiral ring with a larger diameter is longer than the length of the spiral ring with a smaller diameter, and the number of the spiral rings on the same cross section of the horizontal cylindrical shell gradually ...

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Abstract

The invention relates to the field of polymer production equipment, and discloses a high-viscosity polymer polycondensation reactor based on a combined stirring mechanism, which includes a horizontal cylindrical shell and a built-in combined stirring mechanism. The combined stirring mechanism includes a first stirrer and a second stirrer which are horizontally connected in series and can rotate independently; the first stirrer and the second stirrer are respectively close to the feed inlet and the discharge port, and the first stirrer is a ring-disk stirrer Or a cage-type network pan stirrer, and the second stirrer is a helical-blade tube-pan stirrer or a spiral-loop tube stirrer. In the present invention, two kinds of agitators with different rotating speeds and different structures are arranged in the same reactor, so that the polymer can still efficiently renew the liquid film at a higher viscosity, effectively improve the mixing and mass transfer effect at high viscosity, and can Effectively increase the intrinsic viscosity of the polymer at the outlet of the reactor, and effectively improve the production capacity and product range of the polycondensation reactor.

Description

technical field [0001] The invention relates to the field of polymer production equipment, in particular to a high-viscosity polymer polycondensation reactor based on a combined stirring mechanism. Background technique [0002] The current production and preparation of polytrimethylene terephthalate (PTT), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), butylene adipate terephthalate Among the polycondensation reactors of alcohol ester (PBAT), polybutylene succinate (PBS) and other types of polyesters, the final polycondensation reactor is the key equipment in the entire production line and is the final polycondensation reactor for polyester polymerization. Disc reactors and cage frame reactors are widely used now. The viscosity of most of the existing reactors after polycondensation can reach 0.62~0.7dl / g. With the continuous development of new products, the viscosity of the material after polycondensation in the reactor is required to reach 0.95 dl / g ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/18B01J19/00B01F7/00B01F7/02
CPCB01J19/18B01J19/0066B01F27/192B01F27/60B01F2101/2805
Inventor 贾振宇彭华峰张保勇柳铭轩陈文
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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