A separation and purification device suitable for small molecules in polyurethane raw materials

Abstract

The utility model discloses a kind of separation and purification devices suitable for polyurethane raw material small molecule substance, including feed pipeline, feed thermometer, temperature regulating valve, stirring motor, separation cylinder, stirring paddle, steam feed regulating valve, discharge thermometer, discharge regulating valve, steam discharge regulating valve, material collecting tank, vacuum pressure gauge, vacuum pump, cold water feed valve, cold water discharge valve, material collection tank, small molecule material collecting tank, stirring paddle disperses material on the inner wall of separation cylinder, by the adjustment of vacuum and temperature, so that small molecule substance is heated after from material dispersion into separation cylinder, condenses to small molecule material collecting tank again.The utility model in the material is directly contacted with steam in the separation process, guarantees the performance of product, whole production process belongs to continuous feeding and material collecting, greatly improves production efficiency, ensures the stability of production process material mixing and the quality of product, obtains good technical effect in the production process of polyurethane raw material.

Description

Technical Field

[0001] This utility model relates to a device for separating and purifying small molecules in polyurethane raw materials. Background Technology

[0002] Polyurethane raw materials mainly include polyether polyols, crosslinking agents, chain extenders, catalysts, and polymeric polyols. Some raw materials contain small molecules such as alcohols, aldehydes, and benzene compounds. The presence of these small molecules can lead to problems such as high odor and uncertain product performance. Current technologies for separating and removing small molecules primarily rely on direct contact between steam and the material. This process not only fails to recover the small molecules but also damages the physicochemical properties of the raw materials to some extent, failing to meet the requirements of current production technologies. Furthermore, the direct contact between steam and the material during the removal process can negatively impact product quality and performance.

[0003] Therefore, a device for separating and purifying small molecules in polyurethane raw materials is urgently needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a device for separating and purifying small molecules in polyurethane raw materials.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model provides a device for separating and purifying small molecules in polyurethane raw materials, including a feed pipeline, a feed thermometer, a temperature regulating valve, a stirring motor, a separation cylinder, a stirring paddle, a steam feed regulating valve, an outlet thermometer, an outlet regulating valve, a steam outlet regulating valve, a receiving trough, a vacuum pressure gauge, a vacuum pump, a cold water feed valve, a cold water outlet valve, a material collection tank, and a small molecule receiving tank. The separation cylinder has an inner cavity and an outer jacket. The feed thermometer is installed on the feed pipeline, which is connected to the inner cavity of the separation cylinder through the temperature regulating valve. The vacuum pump is regulated by a vacuum regulator. The valve is connected to the inner cavity of the separation cylinder, and the vacuum pressure gauge is located between the vacuum pump and the vacuum regulating valve; the steam feed regulating valve and the steam discharge regulating valve are connected to the outer jacket of the separation cylinder; the output shaft of the stirring motor is connected to the top of the stirring paddle, and the stirring paddle is rotatably located in the inner cavity of the separation cylinder; a baffle is provided in the inner cavity of the separation cylinder below the stirring paddle, and a condensate pipe is provided in the inner cavity of the separation cylinder inside the stirring paddle. The inlet and outlet of the condensate pipe pass through the baffle and the bottom of the separation cylinder in sequence, and are connected to the cold water feed valve and the cold water discharge valve.

[0007] The receiving trough is located on the inner wall of the separation cylinder and below the stirring paddle. The inlet of the discharge regulating valve passes through the separation cylinder and is connected to the receiving trough. The outlet of the discharge regulating valve is connected to the discharge thermometer and the material collection tank. The small molecule receiving tank is connected to the bottom of the separation cylinder.

[0008] Preferably, the stirring paddle has a plate-frame structure, and the stirring paddle is mounted on the condenser tube without any transmission connection between the two.

[0009] Preferably, the receiving trough has a spiral or annular structure, and the height of the receiving trough is 5~30cm.

[0010] Preferably, the area of ​​the stirring paddle ranges from 10 to 50 m². 2 The frequency of the stirring motor is 100~600Hz.

[0011] Preferably, a steam feed regulating valve and a discharge temperature interlocking unit are provided between the steam feed regulating valve and the discharge temperature gauge.

[0012] Preferably, an interlocking unit between the steam feed regulating valve and the feed thermometer is provided between the steam feed regulating valve and the feed thermometer.

[0013] Preferably, an interlocking unit between the feed thermometer and the vacuum regulating valve is provided.

[0014] Preferably, the diameter of the feed pipeline is DN20~100, the diameter range of the discharge regulating valve is DN10~100, the temperature of the feed thermometer is 80~180℃, the regulating temperature of the steam feed regulating valve is 50~200℃, and the regulating temperature of the cold water feed valve is 5~40℃.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] In this invention, the material does not come into direct contact with steam during the separation process, ensuring product performance. Small molecules can be effectively cooled and collected in storage tanks during the separation process. The entire production process is continuous feeding and receiving, which greatly improves production efficiency and better meets industrial production needs. The invention also enables online monitoring and control of the material separation process, ensuring the stability of material mixing and product quality during the production process. This invention has achieved good technical results in the production of polyurethane raw materials. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a device for separating and purifying small molecules in polyurethane raw materials according to this utility model. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] In the description of this utility model, it should be understood that the terms "top," "bottom," "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the accompanying drawings. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1 As shown, this embodiment provides a device for separating and purifying small molecules in polyurethane raw materials, including a feed pipeline 1, a feed thermometer 2, a temperature regulating valve 3, a stirring motor 4, a separation cylinder 5, a stirring paddle 6, a steam feed regulating valve 7, a discharge thermometer 9, a discharge regulating valve 10, a steam discharge regulating valve 12, a receiving trough 14, a vacuum pressure gauge 15, a vacuum pump 16, a cold water feed valve 17, a cold water discharge valve 18, a material collection tank 19, and a small molecule receiving tank 20. The separation cylinder 5 has an inner cavity and an outer jacket. The feed thermometer 2 is installed on the feed pipeline 1, and the feed pipeline 1 is connected to the inner cavity of the separation cylinder 5 through the temperature regulating valve 3. The vacuum pump 16 is connected to the inner cavity of the separation cylinder 5 through the vacuum regulating valve. The vacuum pressure gauge 15 is connected between the vacuum pump 16 and the vacuum regulating valve; the steam feed regulating valve 7 and the steam discharge regulating valve 12 are connected to the outer jacket of the separation cylinder 5; the output shaft of the stirring motor 4 is connected to the top of the stirring paddle 6, the stirring paddle 6 is rotatably installed in the inner cavity of the separation cylinder 5, the stirring paddle 6 has a plate frame structure, the stirring paddle 6 is mounted on the condenser tube and the two are not connected by transmission; a partition is provided in the inner cavity of the separation cylinder 5 below the stirring paddle 6, and a condensate pipe is provided in the inner cavity of the separation cylinder 5 inside the stirring paddle 6, the inlet and outlet of the condensate pipe pass through the partition and the bottom of the separation cylinder 5 in sequence and are connected to the cold water feed valve 17 and the cold water discharge valve 18;

[0022] The receiving trough 14 is located on the inner wall of the separation cylinder 5 and below the stirring paddle 6. The inlet of the discharge regulating valve 10 passes through the separation cylinder 5 and is connected to the receiving trough 14. The outlet of the discharge regulating valve 10 is connected to the discharge thermometer 9 and the material collection tank 19. The small molecule receiving tank 20 is connected to the bottom of the separation cylinder 5.

[0023] Specifically, the receiving trough 14 has a ring structure, and its height can be selected according to actual conditions, being 5, 20, or 30 cm. The area of ​​the stirring paddle 6 is 10, 25, or 50 m². 2 The frequency of the stirring motor 4 is 100, 300, or 600 Hz. The diameter of the feed pipeline 1 is DN20, 50, or 100, the diameter of the discharge regulating valve 10 is DN10~100, the temperature of the feed thermometer 2 is 80~180℃, the regulating temperature of the steam feed regulating valve 7 is 50~200℃, and the regulating temperature of the cold water feed valve 17 is 5~40℃.

[0024] Specifically, a steam feed regulating valve and discharge temperature interlocking unit 8 is provided between the steam feed regulating valve 7 and the discharge thermometer 9. A feed thermometer and steam feed regulating valve interlocking unit 11 is provided between the steam feed regulating valve 7 and the feed thermometer 2. A feed thermometer and vacuum regulating valve interlocking unit 13 is provided between the feed thermometer 2 and the vacuum regulating valve.

[0025] In a preferred embodiment, the receiving trough 14 has a spiral structure and is spirally arranged along the inner wall of the separation cylinder 5 in the vertical direction. The inlet of the discharge regulating valve 10 is connected to the bottom of the receiving trough 14. The structural design of the receiving trough facilitates material collection.

[0026] The working principle of this embodiment will be further explained below:

[0027] Start the vacuum pump 16 and the agitator 6. Install the feed thermometer 2 on the feed line 1. When the vacuum and temperature reach the requirements, the material starts to be fed. The agitator 6 effectively disperses the material on the inner wall of the separation cylinder 5. Through the interlocking unit 11 between the feed thermometer and the steam feed regulating valve, and the interlocking unit 13 between the feed thermometer and the vacuum regulating valve, the small molecules in the material are dispersed from the material into the separation cylinder after being heated by the vacuum and temperature adjustment parameters. They are then condensed into the small molecule collection tank 20 through the condenser tube. The material with the separated small molecules enters the collection trough 14.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for separating and purifying small molecule substances in polyurethane raw materials, characterized in that, The features include a feed pipeline (1), a feed thermometer (2), a temperature regulating valve (3), a stirring motor (4), a separation cylinder (5), a stirring paddle (6), a steam feed regulating valve (7), a discharge thermometer (9), a discharge regulating valve (10), a steam discharge regulating valve (12), a receiving trough (14), a vacuum pressure gauge (15), a vacuum pump (16), a cold water feed valve (17), a cold water discharge valve (18), a material collection tank (19), and a small molecule receiving tank (20). The separation cylinder (5) is provided with an inner cavity and an outer jacket. The feed thermometer (2) is installed on the feed pipeline (1). The feed pipeline (1) is connected to the inner cavity of the separation cylinder (5) through the temperature regulating valve (3). The vacuum pump (16) is regulated by a vacuum regulator. The valve is connected to the inner cavity of the separation cylinder (5), and the vacuum pressure gauge (15) is located between the vacuum pump (16) and the vacuum regulating valve; the steam feed regulating valve (7) and the steam discharge regulating valve (12) are connected to the outer jacket of the separation cylinder (5); the output shaft of the stirring motor (4) is connected to the top of the stirring paddle (6), and the stirring paddle (6) is rotatably located in the inner cavity of the separation cylinder (5); a partition is provided in the inner cavity of the separation cylinder (5) and below the stirring paddle (6); a condensate pipe is provided in the inner cavity of the separation cylinder (5) and inside the stirring paddle (6); the inlet and outlet of the condensate pipe pass through the partition and the bottom of the separation cylinder (5) respectively and are connected to the cold water feed valve (17) and the cold water discharge valve (18); The receiving trough (14) is located on the inner wall of the separation cylinder (5) and below the stirring paddle (6). The inlet of the discharge regulating valve (10) passes through the separation cylinder (5) and is connected to the receiving trough (14). The outlet of the discharge regulating valve (10) is connected to the discharge thermometer (9) and the material collection tank (19). The small molecule receiving tank (20) is connected to the bottom of the separation cylinder (5).

2. The apparatus for separating and purifying small molecule substances in polyurethane raw materials according to claim 1, characterized in that, The stirring paddle (6) has a plate and frame structure. The stirring paddle (6) is mounted on the condenser tube and the two are not connected by transmission.

3. The apparatus for separating and purifying small molecule substances in polyurethane raw materials according to claim 2, characterized in that, The receiving trough (14) has a spiral or ring structure, and the height of the receiving trough (14) is 5~30cm.

4. The apparatus for separating and purifying small molecule substances in polyurethane raw materials according to claim 3, characterized in that, The area of ​​the stirring paddle (6) ranges from 10 to 50 m². 2 The frequency of the stirring motor (4) is 100~600Hz.

5. The apparatus for separating and purifying small molecule substances in polyurethane raw materials according to claim 4, characterized in that, A steam feed regulating valve and discharge temperature interlocking unit (8) is provided between the steam feed regulating valve (7) and the discharge temperature gauge (9).

6. The apparatus for separating and purifying small molecule substances in polyurethane raw materials according to claim 5, characterized in that, A feed thermometer and steam feed regulating valve interlocking unit (11) is provided between the steam feed regulating valve (7) and the feed thermometer (2).

7. The apparatus for separating and purifying small molecule substances in polyurethane raw materials according to claim 6, characterized in that, A feed thermometer and vacuum regulating valve interlocking unit (13) is provided between the feed thermometer (2) and the vacuum regulating valve.

8. The apparatus for separating and purifying small molecule substances in polyurethane raw materials according to claim 1, characterized in that, The diameter of the feed pipeline (1) is DN20~100, the diameter of the discharge regulating valve (10) is DN10~100, the temperature of the feed thermometer (2) is 80~180℃, the regulating temperature of the steam feed regulating valve (7) is 50~200℃, and the regulating temperature of the cold water feed valve (17) is 5~40℃.

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