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Polymerization reactor for producing suspension type polyvinyl-chloride

A polymerization reactor and polyvinyl chloride technology, which is applied in the field of stirring devices and baffles, achieves the effects of uniform particle distribution, energy saving, and rapid and effective dispersion.

Active Publication Date: 2007-10-10
SHANGHAI CHLOR ALKALI CHEM +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved in the present invention is to disclose a polymerization reactor for producing polyvinyl chloride by the suspension method, so as to overcome the problem that the existing technology cannot be used for a volume of 120 to 140 meters. 3 defects in the suspension polymerization of vinyl chloride;

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  • Polymerization reactor for producing suspension type polyvinyl-chloride
  • Polymerization reactor for producing suspension type polyvinyl-chloride

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Embodiment Construction

[0018] See Fig. 1 and Fig. 2, polymerization reactor of the present invention comprises:

[0019] A cylindrical vertical pressure vessel 1 with a material inlet 2 at the top and a material outlet 3 at the bottom. The volume of the cylindrical vertical pressure vessel 1 is 120-140 m3, and the ratio of height to inner diameter is: height : Inner diameter=10.4~0.6;

[0020] A stirring device axially installed in the pressure vessel 1, the stirring device used in the present invention includes a stirring shaft 4 axially installed in the reactor 1 and a three-layer oblique paddle stirring device arranged on the stirring shaft 4 Paddle, each layer of stirring paddles is provided with three arc-shaped paddles 5 having an angle α with the stirring shaft 4; 400-600mm, the length L of the paddle 5 is 0.4-0.6 of the inner diameter of the reactor 1;

[0021] An external cooling coil 6 arranged outside the pressure vessel;

[0022] Two internal cooling pipes 7 vertically arranged in the...

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Abstract

This invention discloses a suspension production method and polymerization reactor for poly chloroethylene. The invention introduces a combination of two inner-cooling tubes and stirrer unit, it can provide radical flow and axial flow the same time, optimal shear stress and recycle time, the particle distribution of produced poly chloroethylene resin is most suitable for rear-processing production. Because this invention totally improved the structure of the reactor, including the stirrer and the buffer plate, the mix - dispersion of the system can be apparently improved. Reaction materials are quickly and effectively dispersed, particles distribution is uniform, as partially non-uniform area disappeared, the reaction space is more effective, the production intensity of the reactor increased, the material and energy consumption reduced. It makes the product more suitable for rear production.

Description

technical field [0001] The present invention relates to a polyvinyl chloride reactor, in particular, it involves using vinyl chloride (VC) as a monomer, using water as a medium, under the action of a catalyst, to polymerize vinyl chloride monomer into polyvinyl chloride by suspension method. A reactor for ethylene, in particular to a stirring device in a polymerization reactor and a baffle installed in the reactor. Background technique [0002] The suspension polymerization reaction of vinyl chloride monomer is a complex reaction. The so-called suspension method PVC production refers to the vinyl chloride monomer (VCM) dissolved with the initiator, which is dispersed into droplets in water under stirring and suspended in water. to aggregate. A dispersant is dissolved in water, so that VCM can be uniformly and stably suspended and dispersed in the water phase, and prevent polymer-monomer particles from sticking together during the polymerization process. [0003] The water-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/06C08F2/18
Inventor 岳群王勤获陈江吴文雄高卫平陈凤飞施宏标宋忠辉张利明沈龙
Owner SHANGHAI CHLOR ALKALI CHEM
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