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Rock characterization instrument for polyvinyl chloride (PVC) polymerization kettleThe PVC polymerization kettle is a device that polymerizes vinyl chloride monomer (VCM) into polyvinyl chloride (PVC) through free radical polymerization reaction mechanism using initiators such as peroxides and azo compounds, or under the action of light and heat.Polyvinyl chloride polymerization kettleRock characterization instrumentFor exothermic reactions, the heat of reaction is removed by the cooling circulating water passing through the jacket of the kettle, and a terminating agent is added at the end of the reaction to kill the active free radicals and terminate the reaction.

• Type characteristics

• Suspension polymerization kettleAt present, the main production method of PVC resin is suspension polymerization. The suspension polymerization kettle is used to suspend vinyl chloride in water under the action of an initiator for polymerization reaction2This type of polymerization kettle is usually equipped with an efficient stirring device and temperature control system to ensure the uniform dispersion of vinyl chloride monomer in water, allowing the polymerization reaction to proceed smoothly and producing PVC resin particles with good particle size uniformity.

• 本体聚合釜The polymerization kettle used for bulk polymerization is not equipped with a stirrer and is not connected in series. Under the action of a small amount of initiator, vinyl chloride monomer undergoes direct polymerization reaction in the kettle. The PVC resin produced by bulk polymerization has high purity and good transparency, but it is difficult to dissipate heat during the production process, which requires high design and manufacturing requirements for the polymerization kettle1.

• Technological development trends

• large-scaleWith the continuous expansion of PVC production scale, the volume of polymerization reactors is also increasing. For example, the application of 136m ³ large polymerization reactors can improve production efficiency, reduce production costs, and reduce equipment footprint5.

• High production intensityBy optimizing the structure and operating process of the polymerization kettle, the speed and efficiency of the polymerization reaction can be improved, the polymerization reaction cycle can be shortened, and the yield per unit time can be increased.

• intelligent controlAdopting excellent DCS control system, intelligent instruments, etc., to achieve precise control of the polymerization reaction process, such as automatic adjustment of parameters such as temperature, pressure, stirring speed, etc., improving the stability and consistency of product quality, while reducing the labor intensity and risk of manual operation2.

• Type characteristics

• Suspension polymerization kettleAt present, the main production method of PVC resin is suspension polymerization. The suspension polymerization kettle is used to suspend vinyl chloride in water under the action of an initiator for polymerization reaction2This type of polymerization kettle is usually equipped with an efficient stirring device and temperature control system to ensure the uniform dispersion of vinyl chloride monomer in water, allowing the polymerization reaction to proceed smoothly and producing PVC resin particles with good particle size uniformity.

• 本体聚合釜The polymerization kettle used for bulk polymerization is not equipped with a stirrer and is not connected in series. Under the action of a small amount of initiator, vinyl chloride monomer undergoes direct polymerization reaction in the kettle. The PVC resin produced by bulk polymerization has high purity and good transparency, but it is difficult to dissipate heat during the production process, which requires high design and manufacturing requirements for the polymerization kettle1.

• Technological development trends

• large-scaleWith the continuous expansion of PVC production scale, the volume of polymerization reactors is also increasing. For example, the application of 136m ³ large polymerization reactors can improve production efficiency, reduce production costs, and reduce equipment footprint5.

• High production intensityBy optimizing the structure and operating process of the polymerization kettle, the speed and efficiency of the polymerization reaction can be improved, the polymerization reaction cycle can be shortened, and the yield per unit time can be increased.

• intelligent controlAdopting excellent DCS control system, intelligent instruments, etc., to achieve precise control of the polymerization reaction process, such as automatic adjustment of parameters such as temperature, pressure, stirring speed, etc., improving the stability and consistency of product quality, while reducing the labor intensity and risk of manual operation2.