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CN-122006646-A - Polymerization reactor and application thereof

CN122006646ACN 122006646 ACN122006646 ACN 122006646ACN-122006646-A

Abstract

The invention belongs to the field of polymer polymerization reactors, and relates to a polymerization reactor and application thereof, wherein the polymerization reactor comprises a cylinder body, an upper sealing head and a lower sealing head; the upper seal head is internally provided with a flow guiding device which is conical, and the conical tip part faces the central flow guiding pipe. The conical flow guiding device can uniformly split the materials flowing out of the central flow guiding pipe, reduce or even eliminate turbulence generated when the materials flow to the flow reducing pipe, accelerate the flow speed of the materials in the flow reducing pipe, and ensure that the materials are distributed more uniformly, so that the wall-mounted glue of the pipe is greatly slowed down, the heat accumulation in the central flow guiding pipe is avoided, and the production efficiency is improved.

Inventors

  • YANG JIANCHUN
  • ZHU RONGXIN

Assignees

  • 北京诺维新材科技有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (10)

  1. 1. The polymerization reactor comprises a barrel, an upper sealing head and a lower sealing head, wherein the upper sealing head is arranged at the top of the barrel, the lower sealing head is arranged at the bottom of the barrel, a tube array is arranged in the barrel, the tube array comprises a central guide tube and a downflow tube, the central guide tube is used as an ascending channel after mixing polymer materials, a catalyst and the polymer materials returned in the downflow tube, the downflow tube is arranged at the periphery of the central guide tube and used for returning part of polymer material mixtures to the bottom of the reactor, and the polymerization reactor is characterized in that a guide device is arranged in the upper sealing head and is conical, and the tip of the cone faces the central guide tube.
  2. 2. The polymerization reactor according to claim 1, wherein the downflow pipes are uniformly distributed on the periphery of a central flow pipe, and the central flow pipe is arranged in the middle of the cylinder.
  3. 3. The polymerization reactor according to claim 1 or 2, wherein the ratio of the diameter of the bottom surface of the deflector to the diameter of the central draft tube is (0.2-2.0): 1.
  4. 4. A polymerisation reactor according to any of claims 1-3, wherein the ratio of the height of said deflector to the height of the upper head is (0.3-1.0): 1.
  5. 5. The polymerization reactor according to any one of claims 1 to 4, wherein the upper portion of the central draft tube extends into the upper head, and the ratio of the length of the extension to the height of the upper head is (0.1 to 0.8): 1.
  6. 6. The polymerization reactor of any one of claims 1-5 wherein the central draft tube has an extension diameter greater than the diameter of the central draft tube.
  7. 7. The polymerization reactor of any one of claims 1-6 wherein the central draft tube has an extension of progressively larger diameter.
  8. 8. The polymerization reactor of any one of claims 1-7 wherein the cone tip of the deflector is at the upper exit plane of the central draft tube.
  9. 9. The polymerization reactor according to any one of claims 1 to 8, wherein a propeller is provided inside the central draft tube, and the propeller is provided at a middle lower portion of the central draft tube, and functions to push the polymerization raw material at the bottom to flow toward the upper portion.
  10. 10. Use of a polymerisation reactor as claimed in any of claims 1 to 9 in a polymerisation reaction.

Description

Polymerization reactor and application thereof Technical Field The invention belongs to the field of high molecular polymerization reactors, relates to a polymerization reactor and application thereof, and in particular relates to a polymerization reactor for olefin cationic polymerization and application thereof in olefin cationic polymerization. Background The cationic polymerization of olefins is one of the important industrial processes for the preparation of synthetic rubber, for example the copolymerization of isobutylene and small amounts of isoprene to form copolymer butyl rubber, the combination of butyl rubber and halogen to form halogenated butyl rubber, both of which are important synthetic rubber varieties, being the main raw materials for the preparation of tires. The cationic polymerization reaction is more intense, the heat release amount is large, the heat must be removed in time in the reaction process, the reaction temperature is controlled well, the ideal polymer product can be obtained, and the polymerization reactor for the cationic polymerization reaction used in industry is designed around the purpose. A representative polymerization reactor is a reactor for butyl rubber, for example, disclosed in patent document RU2097122, the reactor is a vertical tubular reactor, the center of the reactor is provided with a plurality of layers of multileaf stirring, a plurality of groups of tube bundles are arranged in the reactor, liquid ethylene is introduced into the tube bundles and takes away polymerization heat through ethylene vaporization, patent document US5417930 discloses a butyl rubber tubular reactor of Exxon company, the tube side is a polymerization reaction zone, the shell side is introduced with a refrigerant to remove the reaction heat, the tube side is composed of equal-diameter tube bundles and is divided into two zones, the central tube bundle is an ascending pipeline, the peripheral tube bundles are a down flow channel, a propeller is arranged at the bottom of the reactor, reaction materials enter the tube side from the bottom of the reactor to react, most of materials flow back to the bottom of the reactor from the peripheral tube bundles after passing through the propeller, and a discharge tube is arranged at the top of the reactor, patent document CN103608100 discloses an improved tubular reactor, the tubular reactor disclosed in US2999084 and US5417930 is improved, the difference from US5417930 is that the central tube is changed into a large-diameter guide tube, the central guide tube is taken as a central guide tube, and the flow rate of the central guide tube is ensured to be equal, and a flow rate is arranged at the same time, and a flow rate equalizing device is arranged at the center. However, the existing reactor still has the problem of uneven flow rate of reaction materials, and uneven flow rate can lead to uneven reaction, thereby causing polymer wall built-up scaling, then affecting the heat transfer efficiency of refrigerants, leading to the problem that the reaction heat can not be discharged in time, causing the difficult continuous reaction and having to stop for cleaning. Thus, there remains a need to find cationic polymerization reactors with balanced flow rates of the reactants, which can extend the polymerization cycle. Disclosure of Invention The invention provides a polymerization reactor and application thereof, and compared with the traditional tubular reactor, the reactor has better thermal efficiency and hydraulic efficiency. Specifically, the invention provides a polymerization reactor, which comprises a cylinder, an upper seal head and a lower seal head, wherein the upper seal head is arranged at the top of the cylinder, and the lower seal head is arranged at the bottom of the cylinder; The reactor comprises a cylinder body, a catalyst and a reactor, wherein a shell is arranged in the cylinder body, the shell comprises a central guide pipe and a downpipe, the central guide pipe is used as an ascending channel after mixing a polymer material, the catalyst and the polymer material returned in the downpipe, and the downpipe is arranged at the periphery of the central guide pipe and is used for returning part of the polymer material mixture to the bottom of the reactor; the upper seal head is internally provided with a flow guiding device, the flow guiding device is conical, and the conical tip part faces to the central flow guiding pipe. According to the embodiment of the invention, the down-flow pipes are uniformly distributed on the periphery of the central flow guide pipe. According to an embodiment of the invention, the central draft tube is arranged in the middle of the cylinder. According to an embodiment of the invention, the central draft tube is arranged concentrically with the cylinder. According to an embodiment of the invention, the flow guiding device is arranged concentrically with the central flow guiding tube. According to an embodi