Polyether polyol stirring device

Abstract

The utility model discloses a polyether polyol stirring device which comprises a stirring container, at least one stirring shaft is arranged in the stirring container, a plurality of stirring blades are arranged on the stirring shaft, the stirring shaft is driven by a motor, a transmission device is arranged between the motor and the stirring shaft, and an auxiliary adding device is further arranged on the stirring container. According to the device, the blades can be mounted on the stirring shaft in a welding, bolt connection or clamping manner, and the operation cost can be reduced by selecting the mounting manner which is easy to replace and maintain, so that the stirring efficiency is improved; the blade is designed into a multi-section type, each section of blade has different curvatures and angles so as to adapt to polyether polyol with different viscosities, and the edge of the blade is designed into a sawtooth shape or is provided with a notch so as to enhance the shearing effect, improve the stirring effect and reduce the stirring energy consumption; for easy-to-adhere polyether polyol, blades with smooth surfaces or special coatings are considered to be used, so that adhesion is reduced, and maintenance is easy.

Description

Technical Field

[0001] The invention belongs to the field of chemical equipment, and in particular relates to a polyether polyol stirring device. Background Art

[0002] Polyether polyol is a key raw material for the production of polyurethane, and its quality directly affects the performance of polyurethane products. In the production process of polyether polyol, the role of the stirring device is to ensure that the raw materials are fully mixed to avoid local overheating or incomplete reaction. However, the existing stirring device has problems such as low efficiency, high energy consumption and difficult maintenance when processing high-viscosity polyether polyol. Summary of the invention

[0003] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a polyether polyol stirring device, the device includes a stirring container, at least one stirring shaft is provided inside the stirring container, a plurality of stirring blades are mounted on the stirring shaft, the stirring shaft is driven by a motor, a transmission device is provided between the motor and the stirring shaft, and an auxiliary agent adding device is also provided on the stirring container.

[0004] Based on the above technical solution, the blades in the device can be installed on the stirring shaft by welding, bolt connection or clamping. Choosing an installation method that is easy to replace and maintain can reduce operating costs. For example, welding is the most direct connection method. The blades can be directly welded to the connecting shaft. The structure is simple, the connection is firm, and the replacement trouble is prevented. Bolts can be fixed to the connecting shaft. This method is convenient for the replacement and maintenance of the blades.

[0005] As an improvement of the utility model, a multi-section blade structure is provided on the stirring blade, and the multi-section blade structure includes a plurality of stirring blade branches at different angles, and the ends of the stirring blade branches are respectively provided with sawtooth structures.

[0006] Based on the above technical solution, the blade is designed to be multi-segmented, each blade having different curvatures and angles to adapt to polyether polyols with different viscosities. The blade edge is designed to be serrated or notched to enhance the shearing effect and improve the stirring effect.

[0007] As an improvement of the utility model, the curvature of the blades of the stirring blade branches increases successively, and the angle is 40 to 60 degrees.

[0008] Based on the above technical solution, the blades are designed to be multi-sectioned, and each section of the blades can have different curvatures and angles to adapt to polyether polyols with different viscosities.

[0009] As an improvement of the utility model, the additive adding device includes an additive storage tank, a metering pump and a control valve, and a liquid outlet is installed at the bottom or side of the storage tank, which is directly connected to the suction end of the metering pump through a pipeline. A plurality of additive adding inlets are arranged inside the stirring container, and the additive storage tank is connected to the plurality of additive adding inlets.

[0010] Based on the above technical solution, multiple additive addition inlets can improve the uniformity of stirring by dispersing the additive. In this solution, the additive addition inlets are arranged along the inner wall of the stirring container.

[0011] As an improvement of the utility model, a connecting wall with a curved surface structure is further provided on the inner wall of the stirring container.

[0012] Based on the above technical solution, the connecting wall of the curved surface structure is a concave, convex or inclined structure to reduce the residue of materials in the container. At the same time, the internal structure is optimized to reduce dead corners and improve stirring efficiency.

[0013] As an improvement of the utility model, the side wall of the stirring container is provided with temperature and pressure sensors.

[0014] Based on the above technical solution, pressure and temperature sensors are arranged on the outer wall of the stirring container to sense and grasp the temperature and pressure values ​​in the stirring container to understand the stirring conditions, because different stirring temperatures generally need to be set when stirring polyether polyols of different viscosities.

[0015] As an improvement of the utility model, a coating structure is provided on the stirring blade to prevent the polyether polyol from sticking.

[0016] Based on the above technical solution, for polyether polyols that are prone to adhesion, consider using blades with smooth surfaces or special coatings to reduce adhesion.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the device includes a stirring container, at least one stirring shaft is provided inside the stirring container, a plurality of stirring blades are mounted on the stirring shaft, the stirring shaft is driven by a motor, a transmission device is provided between the motor and the stirring shaft, and an additive adding device is also provided on the stirring container. The blades in the device can be mounted on the stirring shaft by welding, bolting or clamping. Selecting an installation method that is easy to replace and maintain can reduce operating costs and improve stirring efficiency; the blades are designed to be multi-stage, and each blade has a different curvature and angle to accommodate polyether polyols of different viscosities. The blade edge is designed to be serrated or notched to enhance the shearing effect, improve the stirring effect, and reduce the stirring energy consumption; for polyether polyols that are easy to adhere, consider using blades with smooth surfaces or special coatings to reduce adhesion and simplify maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the structure of the polyether polyol stirring device in the utility model.

[0019] List of illustration symbols: 1- stirring shaft, 2- stirring blade, 3- motor, 4- additive storage tank, 5- additive addition inlet, 6- stirring blade branch, 8- connecting wall, 9- temperature sensor, 10- metering pump, 11- transmission device, 12- pressure sensor. DETAILED DESCRIPTION

[0020] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0021] Example: Figure 1 As shown, a polyether polyol stirring device comprises a stirring container, at least one stirring shaft 1 is provided inside the stirring shaft, a plurality of stirring blades 2 are mounted on the stirring shaft 1, the stirring shaft 1 is driven by a motor 3, a transmission device 11 is provided between the motor 3 and the stirring shaft 1, and an auxiliary agent adding device is also provided on the stirring container. The blades in this device can be mounted on the stirring shaft 1 by welding, bolting or clamping. Selecting an installation method that is easy to replace and maintain can reduce operating costs. For example, welding is the most direct connection method. The blades can be directly welded to the connecting shaft, which has a simple structure and a firm connection to prevent the trouble of replacement. The blades can be fixed to the connecting shaft by bolts. This method facilitates the replacement and maintenance of the blades.

[0022] As an improvement of the present embodiment, a multi-segment blade structure is provided on the stirring blade 2, and the multi-segment blade structure includes a plurality of stirring blade 2 branches at different angles, and the ends of the stirring blade 2 branches are respectively provided with a serrated structure. The blade is designed to be multi-segmented, and each blade has a different curvature and angle to adapt to polyether polyols of different viscosities. The blade edge is designed to be serrated or notched to enhance the shearing effect and improve the stirring effect.

[0023] As an improvement of this embodiment, the curvature of the blades of the stirring blade 2 branches increases successively, and the angle is 40 to 60 degrees. The blades are designed to be multi-segmented, and each blade has a different curvature and angle to adapt to polyether polyols with different viscosities.

[0024] As an improvement of this embodiment, the additive adding device includes an additive storage tank 4, a metering pump 10 and a control valve, and a plurality of additive adding inlets 5 are provided inside the stirring container, and the additive storage tank 4 is connected to the plurality of additive adding inlets 5. The plurality of additive adding inlets 5 can improve the uniformity of stirring by dispersing the additive. In this solution, the additive adding inlets 5 are arranged along the inner wall of the stirring container.

[0025] As an improvement of this embodiment, a connecting wall 8 with a curved surface structure is further provided on the inner wall of the stirring container. The connecting wall 8 with a curved surface structure is a concave, convex or inclined surface structure, which reduces the residue of materials in the container, and at the same time optimizes the internal structure to reduce dead angles and improve stirring efficiency.

[0026] As an improvement of this embodiment, the side wall of the stirring container is provided with a temperature and pressure sensor 12. The pressure and temperature sensor 9 is arranged on the outer side wall of the stirring container, and is used to sense and grasp the temperature and pressure values ​​in the stirring container to understand the stirring conditions, because different stirring temperatures generally need to be set when stirring polyether polyols of different viscosities.

[0027] As an improvement of this embodiment, a coating structure is provided on the stirring blade 2 to prevent the polyether polyol from sticking. For polyether polyols that are easy to stick, consider using blades with smooth surfaces or special coatings to reduce adhesion.

[0028] It should be noted that the above content only illustrates the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications all fall within the protection scope of the claims of the present invention.

Claims

1. A polyether polyol stirring device, characterized in that: The device comprises a stirring container, wherein at least one stirring shaft (1) is provided inside the stirring container, a plurality of stirring blades (2) are mounted on the stirring shaft (1), the stirring shaft (1) is driven by a motor (3), a transmission device (11) is provided between the motor (3) and the stirring shaft (1), and an auxiliary agent adding device is also provided on the stirring container.

2. A polyether polyol stirring device according to claim 1, characterized in that: A multi-segment blade structure is provided on the stirring blade (2), the multi-segment blade structure comprising a plurality of stirring blade (2) branches at different angles, and the ends of the stirring blade (2) branches are respectively provided with sawtooth structures.

3. A polyether polyol stirring device according to claim 1, characterized in that: The curvatures of the blades of the stirring blade (2) branch gradually increase, and the angles are 40 to 60 degrees.

4. A polyether polyol stirring device according to claim 1, characterized in that: The auxiliary agent adding device comprises an auxiliary agent storage tank (4), a metering pump (10) and a control valve. A plurality of auxiliary agent adding inlets (5) are arranged inside the stirring container. The auxiliary agent storage tank (4) is connected to the plurality of auxiliary agent adding inlets (5).

5. A polyether polyol stirring device according to claim 1, characterized in that: A connecting wall (8) having a curved surface structure is also provided on the inner wall of the stirring container.

6. A polyether polyol stirring device according to claim 1, characterized in that: The side wall of the stirring container is provided with a temperature and pressure sensor (12).

7. A polyether polyol stirring device according to claim 1, characterized in that: A coating structure is provided on the stirring blade (2).

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