A synchronous stirring polyether polyol double-metal reaction kettle

Abstract

The utility model relates to the field of polyether polyol production and processing technology, concretely to a synchronous stirring polyether polyol bimetal reaction kettle, including main part, its characterized in being that: the top of main part is equipped with the closed cover, is equipped with a plurality of charging ports on the closed cover, the inside of main part is equipped with rotating shaft, one end of rotating shaft is equipped with U type stirring shaft, the symmetrical groove is equipped on U type stirring shaft, the inside of groove is equipped with scraper, one side of groove is equipped with screw groove, the inside of screw groove is equipped with threaded rod, the top of threaded rod is equipped with limit stop, one end of rotating shaft is equipped with planetary gear reducer, the input of planetary gear reducer is equipped with motor, the top of turbine stirring blade is equipped with connecting shaft, the bottom of main part is equipped with discharge pipe, the outside of discharge pipe is equipped with solenoid valve, utilize the structure of dispersion disc, limit ring, groove, limit stop, solve the problem that the catalyst granule is easy to gather in the reaction process because of local concentration too high or stirring is not sufficient, further reduce the catalytic efficiency.

Description

Technical Field

[0001] This utility model relates to the field of polyether polyol production and processing technology, specifically to a bimetallic reactor for polyether polyol with synchronous stirring. Background Technology

[0002] Polyether polyols are an important class of polymers widely used in the synthesis of polyurethane materials (such as foams, elastomers, and coatings). Their production typically involves the ring-opening polymerization of epoxides (such as propylene oxide and ethylene oxide) under the action of a catalyst. In the synthesis of polyether polyols, bimetallic catalysts, compared to traditional monometallic catalysts (such as potassium hydroxide), exhibit higher catalytic activity, selectivity, and stability. They can significantly reduce side reactions (such as chain transfer and oxidation byproducts), improve the uniformity of the product's molecular weight distribution, and reduce subsequent neutralization steps.

[0003] Traditional reactors suffer from limited mixing efficiency and a single stirring method, making it difficult to fully utilize the performance advantages of bimetallic catalysts. Furthermore, catalyst particles are prone to agglomeration during the reaction due to excessively high local concentrations or insufficient stirring, further reducing catalytic efficiency.

[0004] Therefore, it is particularly important to design a bimetallic reactor for polyether polyols with synchronous stirring to overcome the above-mentioned technical defects and improve overall practicality. Utility Model Content

[0005] The purpose of this invention is to provide a bimetallic reactor for polyether polyols with synchronous stirring, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A bimetallic reactor for synchronously stirring polyether polyols includes a main body, characterized in that: a closed cover plate is provided on the top of the main body, and the closed cover plate is provided with several feeding ports; a rotating shaft is provided inside the main body, and several dispersing discs are provided on the rotating shaft; a limiting ring is provided at the top of the dispersing discs; a U-shaped stirring shaft is provided at one end of the rotating shaft; a slot is symmetrically provided on the U-shaped stirring shaft; a scraper is provided inside the slot; a threaded groove is provided on one side of the slot; a threaded rod is provided inside the threaded groove; a limiting block is provided at the top of the threaded rod; a planetary gear reducer is provided at one end of the rotating shaft; a motor is provided at the input end of the planetary gear reducer; a turbine stirring blade is provided on one side of the U-shaped stirring shaft; a connecting shaft is provided at the top of the turbine stirring blade; a high-speed motor is provided at the top of the connecting shaft; a discharge pipe is provided at the bottom of the main body; and a solenoid valve is provided outside the discharge pipe.

[0008] As a preferred embodiment of this utility model, the closed cover plate is connected to the main body via a flange, and a sealing gasket is provided at the bottom end of the limiting block.

[0009] As a preferred embodiment of this utility model, the dispersion discs are three in number and are evenly distributed along the axial direction of the rotation axis, and the limiting ring is connected to the rotation axis by an embedded bolt.

[0010] As a preferred embodiment of this utility model, the scraper and the slot are embedded in each other, and the scraper is made of a rigid and wear-resistant material, specifically made of polytetrafluoroethylene reinforced with carbon fiber.

[0011] As a preferred embodiment of this utility model, the turbine stirring blade has an inclination angle of 15° to 45°, and the turbine stirring blade has a serrated structure at its end, and the turbine stirring blade is located below / at a height of the liquid surface.

[0012] As a preferred embodiment of this utility model, the planetary gear reducer is fixed to the closed cover plate by a flange, and the motor output shaft is connected to the planetary gear reducer input shaft by a key.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, a bimetallic reactor for polyether polyols with synchronous stirring is designed. Utilizing a structure consisting of a dispersion disc, a limiting ring, a U-shaped stirring shaft, a slot, a scraper, a threaded groove, a threaded rod, and a limiting block, liquid polyether polyol raw materials are fed into the reactor through the feeding port. A motor drives the rotating shaft to rotate clockwise, while a high-speed motor simultaneously drives the turbine stirring blades to rotate counterclockwise, creating three-dimensional stirring. After the catalyst is added, the particles are refined through multi-stage shearing by the three-layer dispersion disc. Combined with the constant scraping of the wall by the scraper on the U-shaped stirring shaft, residue-free mixing is achieved. After the reaction, the material is discharged through a discharge pipe and a solenoid valve. The flange-connected sealed cover allows for quick maintenance, and the scraper can be quickly replaced via the limiting block. This design solves the problem of traditional reactors, which suffer from a single stirring method and insufficient mixing efficiency, making it difficult to fully utilize the performance advantages of bimetallic catalysts. Furthermore, it addresses the issue that catalyst particles are prone to agglomeration during the reaction due to excessively high local concentrations or insufficient stirring, further reducing catalytic efficiency. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the entire utility model;

[0016] Figure 2 This is a schematic diagram of the internal components of the reactor of this utility model;

[0017] Figure 3 This is a schematic diagram of the overall planar structure of this utility model.

[0018] In the diagram: 1. Main body; 101. Closed cover plate; 102. Feed port; 103. Discharge pipe; 104. Solenoid valve; 2. Rotating shaft; 201. Dispersing disc; 202. Limiting ring; 203. U-shaped stirring shaft; 204. Slot; 205. Scraper; 206. Threaded groove; 207. Threaded rod; 208. Limiting block; 209. Planetary gear reducer; 210. Motor; 3. Turbine stirring blade; 301. Connecting shaft; 302. High-speed motor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0021] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] For examples, please refer to Figure 1-3 This utility model provides a technical solution:

[0024] A bimetallic reactor for polyether polyols with synchronous stirring includes a main body 1. The top of the main body 1 is provided with a closed cover plate 101, which has several feeding ports 102. Inside the main body 1 is a rotating shaft 2, on which several dispersion discs 201 are mounted. A limiting ring 202 is provided at the top of each dispersion disc 201. One end of the rotating shaft 2 is provided with a U-shaped stirring shaft 203. The U-shaped stirring shaft 203 has symmetrically arranged grooves 204, inside which scrapers 205 are provided. One side of the grooves 204 has a threaded groove 206. The internal part of the 206 is equipped with a threaded rod 207, and the top end of the threaded rod 207 is equipped with a limiting block 208. One end of the rotating shaft 2 is equipped with a planetary gear reducer 209, and the input end of the planetary gear reducer 209 is equipped with a motor 210. One side of the U-shaped stirring shaft 203 is equipped with a turbine stirring blade 3, and the top end of the turbine stirring blade 3 is equipped with a connecting shaft 301. The top end of the connecting shaft 301 is equipped with a high-speed motor 302. The bottom of the main body 1 is equipped with a discharge pipe 103, and the outside of the discharge pipe 103 is equipped with a solenoid valve 104. The material is fed through the feeding port 10 at the top of the closed cover plate 101. 2. Add polyether polyol raw material, then start motor 210 to drive planetary gear reducer 209 to rotate shaft 2 clockwise. Simultaneously, start high-speed motor 302 to drive turbine agitator 3 to rotate counterclockwise. Then add catalyst through feed port 102. The catalyst falls onto the first dispersion disc 201. Centrifugal force throws large particles toward the vessel wall, while some small particles enter the second dispersion disc 201 through pores. The particles passing through the upper pores undergo secondary shearing, further refining the particle size and guiding the particles to diffuse to the bottom. The third dispersion disc 201 intercepts... For particles with a strong tendency to settle, three equally spaced dispersion discs 201 form a multi-level shear zone to disperse the material, preventing catalyst settling or agglomeration. At the same time, scrapers 205 on the U-shaped stirring shaft 203 scrape the vessel wall at a constant interval to ensure no residual mixing and achieve three-dimensional synchronous stirring. After the reaction is completed, the material is accurately discharged through the bottom discharge pipe 103 and the solenoid valve 104. The flange-connected sealing cover 101 supports quick disassembly and maintenance. If the scraper is worn, the limit block 208 can be rotated to detach the scraper from the U-shaped stirring shaft 203 for replacement.

[0025] The closed cover plate 101 is connected to the main body 1 via a flange. The bottom end of the limiting block 208 is equipped with a sealing gasket. The flange connection allows for quick disassembly, facilitating cleaning or replacement of internal components. There are three dispersing discs 201, evenly spaced along the axial direction of the rotating shaft 2. The limiting ring 202 is connected to the rotating shaft 2 via embedded bolts. The three equally spaced dispersing discs form a multi-stage shear zone, improving mixing uniformity and shortening the reaction cycle. The scraper 205 is embedded in the slot 204, and the scraper 205 is made of a rigid, wear-resistant material, specifically polytetrafluoroethylene reinforced with carbon fiber. The quality ensures that the scraper 205 maintains a constant gap of 1-3mm under the adjustment of the threaded rod 207, avoiding scraping failure caused by elastic deformation. The blade inclination angle of the turbine agitator 3 is 15°-45°, and the end of the turbine agitator 3 is provided with a serrated structure. The turbine agitator 3 is located at 1 / 3 of the height below the liquid surface. When the liquid level is 2m, the turbine is located at a depth of 0.67m to avoid eddy current entrainment of gas. The planetary gear reducer 209 is fixed to the closed cover plate 101 by a flange, and the output shaft of the motor 210 is connected to the input shaft of the planetary gear reducer 209 by a key to prevent damage to the transmission system.

[0026] The working process of this utility model is as follows: When using this type of synchronously stirred polyether polyol bimetallic reactor, polyether polyol raw materials are first added through the feed port 102 at the top of the sealed cover plate 101. Then, the motor 210 is started to drive the planetary gear reducer 209 to rotate the rotating shaft 2 clockwise. At the same time, the high-speed motor 302 is started to drive the turbine stirring blades 3 to rotate counterclockwise. Then, the catalyst is added through the feed port 102. The catalyst falls onto the first layer dispersion disk 201. Through centrifugal force, large particles are thrown towards the reactor wall, and some small particles enter the second layer dispersion disk 201 through the pores. The particles passing through the upper layer pores are then subjected to secondary shearing, further... The particle size is refined and the particles are guided to diffuse to the bottom. The third-layer dispersion disk 201 intercepts particles with strong settling tendency. The three equally spaced dispersion disks 201 form a multi-level shear zone to disperse the material and avoid catalyst settling or agglomeration. At the same time, the scraper 205 on the U-shaped stirring shaft 203 scrapes the vessel wall at a constant interval to ensure no residual mixing and achieve three-dimensional synchronous stirring. After the reaction is completed, the material is accurately discharged through the bottom discharge pipe 103 and the solenoid valve 104. The flange-connected sealing cover 101 supports quick disassembly and maintenance. If the scraper is worn, the limit block 208 can be rotated to detach the scraper from the U-shaped stirring shaft 203 for replacement.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0028] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is through a controller. The control circuit of the controller can be realized by a person skilled in the art through simple circuit connection. It is common knowledge in the field. Therefore, this application will not explain the control method and circuit connection in detail.

Claims

1. A bimetallic reactor for polyether polyols with synchronous stirring, comprising a main body (1), characterized in that: The main body (1) has a closed cover plate (101) on its top, and the closed cover plate (101) has several feeding ports (102). The main body (1) has a rotating shaft (2) inside, and the rotating shaft (2) has several dispersing discs (201). The top of the dispersing discs (201) has a limiting ring (202). One end of the rotating shaft (2) has a U-shaped stirring shaft (203). The U-shaped stirring shaft (203) has symmetrically arranged slots (204). The slots (204) have scrapers (205) inside, and one side of the slots (204) has a threaded groove (206). The interior of the 06) is provided with a threaded rod (207), the top end of the threaded rod (207) is provided with a limiting block (208), one end of the rotating shaft (2) is provided with a planetary gear reducer (209), the input end of the planetary gear reducer (209) is provided with a motor (210), one side of the U-shaped stirring shaft (203) is provided with a turbine stirring blade (3), the top end of the turbine stirring blade (3) is provided with a connecting shaft (301), the top end of the connecting shaft (301) is provided with a high-speed motor (302), the bottom of the main body (1) is provided with a discharge pipe (103), and the outside of the discharge pipe (103) is provided with a solenoid valve (104).

2. The bimetallic reactor for synchronously stirred polyether polyols according to claim 1, characterized in that: The closed cover plate (101) is connected to the main body (1) by a flange, and the bottom end of the limiting block (208) is provided with a sealing gasket.

3. The bimetallic reactor for synchronously stirred polyether polyols according to claim 1, characterized in that: The number of the dispersing discs (201) is three, and they are evenly distributed along the axial direction of the rotating shaft (2). The limiting ring (202) is connected to the rotating shaft (2) by an embedded bolt.

4. The bimetallic reactor for synchronously stirred polyether polyols according to claim 1, characterized in that: The scraper (205) and the slot (204) are embedded in each other, and the scraper (205) is made of rigid and wear-resistant material, specifically made of polytetrafluoroethylene reinforced with carbon fiber.

5. The bimetallic reactor for synchronously stirred polyether polyols according to claim 1, characterized in that: The blade angle of the turbine stirring blade (3) is 15° to 45°, and the end of the turbine stirring blade (3) is provided with a serrated structure, and the turbine stirring blade (3) is located 1 / 3 of the height below the liquid surface.

6. The bimetallic reactor for synchronously stirred polyether polyols according to claim 1, characterized in that: The planetary gear reducer (209) is fixed to the closed cover plate (101) by a flange, and the output shaft of the motor (210) is connected to the input shaft of the planetary gear reducer (209) by a key.

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