Polymerization reaction device for producing polycarbonate diol

Abstract

The utility model discloses a polymerization reaction device for polycarbonate diol production, which comprises a polymerization kettle body, a preheating cylinder body coaxially arranged with the polymerization kettle body is arranged at the upper part of an inner cavity of the polymerization kettle body, the top end and the bottom end of the preheating cylinder body are respectively blocked, and a stirring shaft coaxially arranged with the preheating cylinder body penetrates through the interior of the preheating cylinder body. A main stirring blade and an auxiliary stirring blade are mounted on a main body of the stirring shaft, the main stirring blade is positioned at the bottom of an inner cavity of the polymerization kettle body, and the auxiliary stirring blade is positioned in the preheating cylinder body; an interlayer is arranged in the preheating cylinder, a preheating cavity is formed between the inner wall of the interlayer and the two ends of the preheating cylinder, a sealed annular clamping cavity is formed between the outer wall of the interlayer and the preheating cylinder, and a spiral heating pipe is installed in the annular clamping cavity and wound outside the interlayer. According to the polymerization reaction device provided by the utility model, materials can be uniformly preheated in the kettle, so that not only can the loss of heat be reduced, but also the whole polymerization reaction system is compact in structure.

Description

Technical Field

[0001] The utility model relates to a polymerization reaction device for producing polycarbonate diol, belonging to the technical field of polycarbonate diol production. Background Art

[0002] Polycarbonate diol is an important raw material for engineering plastics, characterized by high molecular weight, high melting point, and high glass transition temperature. Polycarbonate diol is a polymer material formed by the polymerization of monomers. This polymerization reaction typically occurs at high temperatures and requires the presence of a catalyst.

[0003] In the polycarbonate diol synthesis process, the various materials used to synthesize the polycarbonate diol need to be added to a polymerization vessel. Directly adding these materials to the polymerization vessel creates a significant temperature difference with the existing materials, causing a localized temperature drop and thus impacting the reaction within the vessel. Therefore, preheating of the materials is necessary.

[0004] In the existing technology, the preheating of materials is carried out through heat exchange equipment outside the kettle. After preheating outside the kettle, the materials are input into the kettle. There is heat loss in the material transmission process, and the heat exchange method outside the kettle will cause the overall polymerization reaction system to be not compact. In addition, there is generally room for improvement in the uniformity of material preheating.

[0005] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content

[0006] The utility model aims to solve the problems in the background technology and provides a polymerization reaction device for producing polycarbonate diol, which can realize uniform preheating of materials in the kettle, thereby reducing heat loss and making the overall polymerization reaction system compact.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A polymerization reaction device for producing polycarbonate diol includes a polymerization kettle body, a coaxially arranged preheating cylinder body is installed on the upper part of the inner cavity of the polymerization kettle body, the top and bottom ends of the preheating cylinder body are both blocked, a coaxially arranged stirring shaft is passed through the interior of the preheating cylinder body, and a main stirring blade and a secondary stirring blade are installed on the main body of the stirring shaft, the main stirring blade is located at the bottom of the inner cavity of the polymerization kettle body, and the secondary stirring blade is located inside the preheating cylinder body;

[0009] A sandwich layer is provided inside the preheating cylinder, and a preheating chamber is formed between the inner wall of the sandwich layer and the two ends of the preheating cylinder; a sealed annular sandwich cavity is provided between the preheating cylinder and the outer wall of the sandwich layer, and a spiral heating tube is installed in the annular sandwich cavity, and the spiral heating tube is wound around the outside of the sandwich layer.

[0010] Furthermore, the top end of the stirring shaft is connected to a driving motor outside the polymerization kettle body.

[0011] Furthermore, a rotating seal is installed at the connection between the bottom wall of the preheating cylinder and the stirring shaft.

[0012] Furthermore, the outer wall of the main body of the preheating cylinder is provided with a fixing ring fixedly connected thereto, and the periphery of the fixing ring is connected to the inner wall of the polymerization kettle through a plurality of evenly distributed support beams.

[0013] Furthermore, the support beam is arranged at an angle, the upper end of the support beam is fixedly connected to the fixing ring, and the lower end of the support beam is fixedly connected to the inner wall of the polymerization kettle.

[0014] Furthermore, the top of the preheating chamber is connected to a secondary feed pipe, which is arranged to pass through the top of the polymerization kettle body.

[0015] Furthermore, a connecting pipe is installed at the bottom of the preheating cylinder, the top of the connecting pipe is connected to the preheating chamber, and a solenoid valve for controlling the flow of materials is installed on the connecting pipe.

[0016] Furthermore, a main feed pipe is installed on the top of the polymerization kettle body, and the main feed pipe is located on the side of the preheating cylinder.

[0017] Furthermore, a temperature sensor is installed on the top of the preheating chamber.

[0018] Compared with the prior art, the present invention has the following advantages after adopting the above technical solution:

[0019] The material to be preheated is introduced into the preheating cylinder at the top of the polymerization kettle through the auxiliary feed pipe. The spiral heating tube is energized to increase the temperature, and the heat is transferred to the material in the preheating chamber through the interlayer, causing it to heat up and preheat. After being preheated to the appropriate temperature, it is directly fed into the bottom of the inner cavity of the polymerization kettle through the connecting pipe to react.

[0020] The stirring shaft in the utility model synchronously drives the main stirring blade and the auxiliary stirring blade to rotate, and the auxiliary stirring blade can achieve uniform preheating of the material;

[0021] The utility model adopts a built-in design of the preheating component, which not only reduces heat loss but also makes the overall polymerization reaction system structure compact.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 A sectional view of the upper structure of the utility model.

[0025] In the figure, 1-polymerization kettle body, 2-stirring shaft, 3-main stirring blade, 4-preheating cylinder, 5-fixed ring, 6-support beam, 7-interlayer, 8-spiral heating tube, 9-rotating seal, 10-auxiliary stirring blade, 11-temperature sensor, 12-main feed pipe, 13-auxiliary feed pipe, 14-connecting pipe, 15-solenoid valve. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown together, the utility model provides a polymerization reaction device for the production of polycarbonate diol, including a polymerization kettle body 1, a preheating cylinder 4 coaxially arranged therewith is installed on the upper part of the inner cavity of the polymerization kettle body 1, the top and bottom ends of the preheating cylinder 4 are both sealed, a stirring shaft 2 coaxially arranged therewith passes through the interior of the preheating cylinder 4, and a main stirring blade 3 and an auxiliary stirring blade 10 are installed on the main body of the stirring shaft 2.

[0028] The main stirring blade 3 and the auxiliary stirring blade 10 rotate synchronously with the stirring shaft 2 . The main stirring blade 3 is located at the bottom of the inner cavity of the polymerization kettle body 1 , and the auxiliary stirring blade 10 is located inside the preheating cylinder 4 .

[0029] The top end of the stirring shaft 2 is connected to the driving motor outside the polymerization kettle body 1.

[0030] A rotating seal 9 is installed at the connection between the bottom wall of the preheating cylinder 4 and the stirring shaft 2 to ensure good sealing at the connection.

[0031] The outer wall of the main body of the preheating cylinder 4 is provided with a fixed ring 5 fixedly connected thereto. The surrounding of the fixed ring 5 is connected to the inner wall of the polymerization kettle body 1 via a plurality of evenly distributed support beams 6. The support beams 6 are arranged at an angle, with the upper end of the support beam 6 fixedly connected to the fixed ring 5 and the lower end of the support beam 6 fixedly connected to the inner wall of the polymerization kettle body 1.

[0032] An interlayer 7 is provided inside the preheating cylinder 4 , and a preheating chamber is formed between the inner wall of the interlayer 7 and the two ends of the preheating cylinder 4 , and the preheating chamber is used for preheating the material.

[0033] There is a sealed annular cavity between the preheating cylinder 4 and the outer wall of the interlayer 7, and a spiral heating tube 8 is installed in the annular cavity. The spiral heating tube 8 is wound around the outside of the interlayer 7. When the spiral heating tube 8 is powered on and heated, the heat is transferred to the material in the preheating chamber through the interlayer 7.

[0034] The top of the preheating chamber is connected to a secondary feed pipe 13 , which passes through the top of the polymerization kettle body 1 and is used to introduce the material to be preheated into the preheating chamber.

[0035] The bottom of the preheating cylinder 4 is provided with a connecting pipe 14, the top of which is connected to the preheating chamber. A solenoid valve 15 for controlling the flow of materials is installed on the connecting pipe 14. The connecting pipe 14 is used to introduce the preheated materials into the bottom of the inner cavity of the polymerization kettle 1.

[0036] A main feed pipe 12 is installed on the top of the polymerization kettle body 1 and is located on the side of the preheating cylinder 4 . The main feed pipe 12 directly introduces materials that do not require preheating into the inner cavity of the polymerization kettle body 1 .

[0037] A temperature sensor 11 is installed on the top of the preheating chamber to display the preheating temperature of the material in real time.

[0038] The specific working principle of this utility model:

[0039] During the synthesis of polycarbonate diol, materials that do not require preheating are directly introduced into the bottom of the inner cavity of the polymerization kettle body 1 through the main feed pipe 12, and materials that need to be preheated are introduced into the preheating chamber of the preheating cylinder 4 through the auxiliary feed pipe 13. The spiral heating tube 8 is energized to increase the temperature, and the heat is transferred to the material in the preheating chamber through the interlayer 7, causing it to heat up and preheat. After being preheated to an appropriate temperature, it is fed into the bottom of the inner cavity of the polymerization kettle body 1 through the connecting pipe 14 to react.

[0040] The stirring shaft 2 in the present invention synchronously drives the main stirring blade 3 and the auxiliary stirring blade 10 to rotate. The auxiliary stirring blade 10 can uniformly preheat the materials, and the main stirring blade 3 can uniformly mix the materials to perform polymerization reaction.

[0041] The above description is merely an example of the preferred embodiment of the present invention. Any details not described in detail are common knowledge within the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A polymerization reaction device for producing polycarbonate diol, characterized in that: The invention comprises a polymerization kettle body (1), wherein a preheating cylinder (4) coaxially arranged therewith is installed on the upper part of the inner cavity of the polymerization kettle body (1), the top and bottom ends of the preheating cylinder (4) are both sealed, a stirring shaft (2) coaxially arranged therewith is passed through the interior of the preheating cylinder (4), a main stirring blade (3) and an auxiliary stirring blade (10) are installed on the main body of the stirring shaft (2), the main stirring blade (3) is located at the bottom of the inner cavity of the polymerization kettle body (1), and the auxiliary stirring blade (10) is located inside the preheating cylinder (4); An interlayer (7) is provided inside the preheating cylinder (4), and a preheating chamber is formed between the inner wall of the interlayer (7) and the two ends of the preheating cylinder (4); a sealed annular cavity is provided between the outer wall of the interlayer (7) and the preheating cylinder (4), and a spiral heating tube (8) is installed in the annular cavity, and the spiral heating tube (8) is wound around the outside of the interlayer (7).

2. The polymerization reaction device for producing polycarbonate diol according to claim 1, wherein: The top end of the stirring shaft (2) is connected to a driving motor outside the polymerization kettle body (1).

3. The polymerization reaction device for producing polycarbonate diol according to claim 1, wherein: A rotating seal (9) is installed at the connection between the bottom wall of the preheating cylinder (4) and the stirring shaft (2).

4. The polymerization reaction device for producing polycarbonate diol according to claim 1, wherein: The outer wall of the main body of the preheating cylinder (4) is provided with a fixed ring (5) fixedly connected thereto, and the periphery of the fixed ring (5) is connected to the inner wall of the polymerization kettle body (1) via a plurality of evenly distributed support beams (6).

5. The polymerization reaction device for producing polycarbonate diol according to claim 4, wherein: The support beam (6) is arranged in an inclined manner, the upper end of the support beam (6) is fixedly connected to the fixing ring (5), and the lower end of the support beam (6) is fixedly connected to the inner wall of the polymerization kettle body (1).

6. The polymerization reaction device for producing polycarbonate diol according to claim 1, wherein: The top of the preheating chamber is connected to a secondary feed pipe (13), and the secondary feed pipe (13) is arranged through the top of the polymerization kettle body (1).

7. The polymerization reaction device for producing polycarbonate diol according to claim 1, wherein: A connecting pipe (14) is installed at the bottom of the preheating cylinder (4), the top of the connecting pipe (14) is connected to the preheating chamber, and a solenoid valve (15) for controlling the flow of materials is installed on the connecting pipe (14).

8. The polymerization reaction device for producing polycarbonate diol according to claim 1, wherein: A main feed pipe (12) is installed on the top of the polymerization kettle body (1), and the main feed pipe (12) is located on the side of the preheating cylinder (4).

9. The polymerization reaction device for producing polycarbonate diol according to claim 1, wherein: A temperature sensor (11) is installed on the top of the preheating chamber.

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