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CN-224208025-U - Polymerization kettle for high-efficient refining treatment of polyether polyol with high EO content

CN224208025UCN 224208025 UCN224208025 UCN 224208025UCN-224208025-U

Abstract

The utility model discloses a polymerization reaction kettle for high-efficiency refining treatment of polyether polyol with high EO content, which comprises a reaction kettle, a separation tank and a purification tank, wherein the reaction kettle is provided with a stirring structure, a heating device and a circulating feeding structure to realize full mixing, accurate temperature control and circulating reaction of materials, the separation tank is internally provided with a centrifugal separator, the purification tank is provided with an adsorbent layer and a distillation device to sequentially finish product separation and purification, an electric three-way valve controls the flow direction of the materials, the material transmission is realized among all containers through connecting pipelines, meanwhile, the equipment is provided with a pressure relief port and a safety valve to ensure safe operation, and a bottom drain outlet is convenient to maintain. The polymerization reaction kettle solves the problems of uneven material mixing, low refining efficiency, poor safety and the like of the conventional equipment through multi-structure cooperation, realizes the efficient production and refining treatment of the polyether polyol with high EO content, has coherent material treatment flow and strong equipment practicability, and can meet the requirement of large-scale industrial production.

Inventors

  • ZHOU PING
  • WANG TAI
  • CAI YUCHEN

Assignees

  • 中化东大(泉州)有限公司

Dates

Publication Date
20260508
Application Date
20250522

Claims (7)

  1. 1. The polymerization reaction kettle for high-efficient refining treatment of polyether polyol with high EO content comprises a reaction kettle (1), a separation tank (2) and a purification tank (3) and is characterized in that an end cover (4) is fixedly arranged at the top of the reaction kettle (1), the separation tank (2) and the purification tank (3), a first feed port (5), a second feed port (7) and a third feed port (8) are respectively arranged at one side of the top of the end cover (4) on the reaction kettle (1), the separation tank (2) and the purification tank (3), a stirring structure (9) is arranged inside the reaction kettle (1), a heating device (23) is further arranged at the lower position inside the reaction kettle (1), a circulating feeding structure (10) is arranged at one end outside the reaction kettle (1), an electric three-way valve (11) is arranged at the lower feed end at the bottom of the reaction kettle (1), a first feed port (6) and a circulating feeding structure (10) are respectively connected with the output end of the electric three-way valve (11), a centrifugal separator (12) is arranged at the lower end of the separation tank (2), a centrifugal separator (13) is arranged at the lower end of the first feed port (13), the inside top of purification jar (3) is provided with adsorbent layer (15), the inside of purification jar (3) is located the below of adsorbent layer (15) simultaneously and is provided with distillation plant (16), second unloading pump (17) are installed to the bottom unloading end of purification jar (3), the bottom of second unloading pump (17) still is provided with third feed opening (18).
  2. 2. The polymerization reaction kettle for high-efficiency refining treatment of high-EO polyether polyol according to claim 1, wherein the stirring structure (9) comprises a stirring motor (91) fixedly arranged on an end cover (4) at the top of the reaction kettle (1), a rotating shaft (92) is connected to the bottom output end of the stirring motor (91) in a key manner, a plurality of stirring paddles (93) are fixedly arranged on the periphery of the rotating shaft (92), and the bottom of the rotating shaft (92) is rotatably connected with the inner bottom end of the reaction kettle (1) through a bearing.
  3. 3. The polymerization reaction kettle for high-efficiency refining treatment of high-EO polyether polyol according to claim 1, wherein the circulating feeding structure (10) comprises a circulating pump body (101) fixedly arranged on an outer side shell of the reaction kettle (1), the input end of the circulating pump body (101) is fixedly connected with a circulating pipeline inlet pipe (102), and the output end of the circulating pump body (101) is fixedly connected with a circulating pipeline outlet pipe (103).
  4. 4. The polymerization reaction kettle for high-efficiency refining treatment of high-EO polyether polyol according to claim 3, wherein one side of the circulating pipeline inlet pipe (102) far away from the circulating pump body (101) is fixedly connected with the output end of the electric three-way valve (11), and one side of the circulating pipeline outlet pipe (103) far away from the circulating pump body (101) is fixedly connected and communicated to the upper inside of the reaction kettle (1).
  5. 5. The polymerization reaction kettle for efficient refining treatment of high EO content polyether polyol according to claim 1, wherein a first connecting pipeline (19) is fixedly connected between a first blanking port (6) at the bottom of the reaction kettle (1) and a second feeding port (7) at the top of the separation tank (2), and a second connecting pipeline (20) is fixedly connected between a second blanking port (14) and a third feeding port (8) at the top of the purification tank (3).
  6. 6. The polymerization reaction kettle for high-efficiency refining treatment of high-EO polyether polyol according to claim 1, wherein the reaction kettle (1), the separation tank (2) and the purification tank (3) are further provided with a pressure relief opening (21), and a safety valve is arranged on the pressure relief opening (21).
  7. 7. The polymerization reaction kettle for high-efficiency refining treatment of high EO content polyether polyol according to claim 1, wherein the bottoms of the reaction kettle (1), the separation tank (2) and the purification tank (3) are also provided with a drain outlet (22).

Description

Polymerization kettle for high-efficient refining treatment of polyether polyol with high EO content Technical Field The utility model relates to the technical field of polymerization reaction equipment, in particular to a polymerization reaction kettle for high-efficiency refining treatment of polyether polyol with high EO content. Background Polyether polyols are important raw materials for producing high molecular materials such as polyurethane, and along with industry development, the demand for polyether polyols with high EO (ethylene oxide) content is increasing. In the production of polyether polyols with high EO content, polymerization reactors are a key device. However, the existing polymerization reaction kettle has a plurality of problems when processing the polyether polyol with high EO content, namely 1. The existing polymerization reaction kettle has a single material mixing mode when processing the polyether polyol with high EO content, and is difficult to realize omnibearing uniform mixing. The reaction efficiency is low, the reaction is insufficient, the fluctuation of the product quality is large, the high-quality polyether polyol cannot be stably produced, and 2, after the reaction is finished, the refining treatment flow of the product is complicated, and the separation and purification means are lagged. And 3, the existing polymerization reaction kettle lacks an effective material circulation structure, and the materials are difficult to realize full cyclic utilization in the reaction kettle, so that partial materials are not reacted thoroughly, the waste of raw materials is caused, and the overall reaction efficiency and the improvement of the product quality are also influenced. Therefore, there is a need to design a polymerization reactor for efficient refining treatment of polyether polyols having high EO content to solve the above-mentioned problems. Disclosure of utility model The utility model aims to provide a polymerization reaction kettle for efficiently refining polyether polyol with high EO content, which solves the problems in the prior art. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a high EO content polyether polyol high-efficient refining process's polymerization reaction cauldron, includes reation kettle, knockout drum and purification jar respectively, reation kettle, knockout drum and purification jar's top fixed mounting have the end cover, and are located end cover top one side on reation kettle, knockout drum and the purification jar is provided with first feed inlet, second feed inlet and third feed inlet respectively, reation kettle's inside is provided with stirring structure, reation kettle's inside still is provided with heating device in the lower position, reation kettle's outside one end is provided with circulation pay-off structure, electric three-way valve is installed to reation kettle's bottom unloading end, electric three-way valve's output is connected with first feed inlet and circulation pay-off structure end respectively, the inside of knockout drum is provided with the centrifuge, the bottom feed inlet of knockout drum is installed first feed pump, the bottom of first feed pump is connected with the second feed inlet, the inside top of purification jar is provided with the adsorbent layer, the inside of purification jar is located the adsorbent layer simultaneously and is provided with heating device, the second feed inlet is still installed to the bottom of purification jar. As a preferable scheme of the utility model, the stirring structure comprises a stirring motor fixedly arranged on an end cover at the top of the reaction kettle, a rotating shaft is connected with the bottom output end of the stirring motor in a key way, a plurality of stirring paddles are fixedly arranged at the periphery of the rotating shaft, and the bottom of the rotating shaft is rotationally connected with the inner bottom end of the reaction kettle through a bearing. As a preferable scheme of the utility model, the circulating feeding structure comprises a circulating pump body fixedly arranged on a shell outside the reaction kettle, wherein the input end of the circulating pump body is fixedly connected with a circulating pipeline inlet pipe, and the output end of the circulating pump body is fixedly connected with a circulating pipeline outlet pipe. As a preferable scheme of the utility model, one side of the circulating pipeline inlet pipe far away from the circulating pump body is fixedly connected with the output end of the electric three-way valve, and one side of the circulating pipeline outlet pipe far away from the circulating pump body is fixedly connected and communicated to the upper part of the reaction kettle. As a preferable scheme of the utility model, a first connecting pipeline is fixedly connected between a first blanking port at the bottom of the reaction