High-purity polyether polyol production device

Abstract

The utility model belongs to the technical field of polyether polyol production equipment, and discloses a high-purity polyether polyol production device, which is characterized in that a discharge port of a raw material mixing tank is communicated with a feed port of a reaction kettle, an inlet end of a separator is communicated with a discharge port of the reaction kettle, and a plurality of separation pipelines communicated with the inlet end of the separator are mounted in the separator; the separation pipeline is filled with a hydrophilic medium, a water phase liquid outlet is formed in the bottom of the separator, a polyether polyol liquid outlet is formed in the upper end of the side face of the separator, and the polyether polyol liquid outlet is communicated with the vacuum purification tank. The raw material mixing tank is used for mixing raw materials, the reaction kettle is used for preparing polyether polyol, and the separation pipeline in the separator is used for primarily filtering the polyether polyol, so that the polyether polyol can be recycled. The water phase liquid outlet and the polyether polyol liquid outlet which are different in height are utilized, polyether polyol can be preliminarily purified according to different densities, the treatment steps are simplified, and the treatment efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyether polyol production equipment, and in particular relates to a high-purity polyether polyol production device. Background Art

[0002] At present, polyether polyol is the main raw material for producing polyurethane synthetic materials, which can react with a variety of isocyanates to produce various types of ether urethane materials, such as polyurethane soft foam, rigid foam, semi-rigid foam, elastomer, artificial leather, coating, adhesive, sealant, fiber and other products, which are widely used in building materials, thermal insulation materials, coatings, plastics and other fields.

[0003] The design of the polyether polyol production equipment has an important impact on the production process of polyether polyols. If the structural design is unreasonable, more impurities will be mixed into the material during the reaction, thus affecting the purity of the product. In traditional technology, purification equipment is usually used for purification, but the purity of the product obtained by relying solely on purification equipment is limited and cannot meet the demand for high-purity polyether polyol products.

[0004] Through the above analysis, the problems and defects of the prior art are as follows: the traditional polyether polyol production device usually adopts purification equipment for purification treatment, and the purity of the obtained product is limited and cannot meet the demand for high-purity polyether polyol products. Utility Model Content

[0005] In order to overcome the problems existing in the related technologies, the utility model provides a high-purity polyether polyol production device.

[0006] The technical solution of the utility model is as follows:

[0007] A high-purity polyether polyol production device is provided with:

[0008] Raw material mixing tank, reactor, separator, vacuum purification tank and control device;

[0009] A discharge port is provided at the lower end of the side of the raw material mixing tank, and the discharge port is connected to the feed port of the reactor through a feed pump and a feed pipeline;

[0010] The inlet end of the separator is connected to the discharge port of the reactor, a plurality of separation pipes connected to the inlet end of the separator are installed inside the separator, the separation pipes are filled with a hydrophilic medium, a water phase outlet is provided at the bottom of the separator, a polyether polyol outlet is provided at the upper end of the side of the separator, and the polyether polyol outlet is connected to a vacuum purification tank;

[0011] The control device comprises a plurality of sensors and controllers with different functions installed at different positions, and the sensors and controllers are connected via connecting lines.

[0012] In one embodiment, a plurality of feeding pipelines are connected to the upper end of the raw material mixing tank, a liquid level detector is installed on the inner side of the raw material mixing tank, a stirring motor is installed on the inner bottom of the raw material mixing tank, a stirring rod is connected to the upper end of the output shaft of the stirring motor, and the liquid level detector and the stirring motor are connected to the controller via connecting lines respectively.

[0013] In one embodiment, a heater is installed at the bottom of the reactor, a cavity is opened in the middle of the side wall of the reactor, and the cavity is connected to an external circulation cooling device through a water inlet and a water outlet.

[0014] In one embodiment, the external circulation cooling device includes a water storage tank, a refrigerator and a circulating water pump. The refrigerator is installed inside the water storage tank. The water storage tank is connected to a water inlet and a water outlet through a circulating water pump and a circulating pipeline.

[0015] In one embodiment, a temperature detection sensor is installed inside the water storage tank, the refrigerator is connected to a power regulator via a connecting line, and the temperature detection sensor and the power regulator are respectively connected to a controller via connecting lines.

[0016] In one embodiment, a discharge valve is provided at the lower end of the side of the vacuum purification tank, an impurity discharge valve is connected to the bottom of the vacuum purification tank, and the upper end of the vacuum purification tank is connected to an external vacuum pumping pipeline.

[0017] In combination with all the above technical solutions, the beneficial effects of the utility model are as follows:

[0018] The utility model uses a raw material mixing tank to mix the raw materials, uses a reactor to prepare polyether polyols, uses a separation pipeline in a separator to preliminarily filter the polyether polyols, uses a water phase liquid outlet and a polyether polyol liquid outlet with different heights to preliminarily purify the polyether polyols by using different densities, simplifies the processing steps, improves the processing efficiency, and effectively avoids the loss of polyether polyols. The polyether polyols prepared by the utility model can be directly used to synthesize polyurethane products, and can reduce side reactions in the synthesis process of polyurethane products, thereby improving the quality of the synthesized polyurethane products.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] Figure 1It is a structural schematic diagram of a high-purity polyether polyol production device provided by an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a raw material mixing tank provided in an embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a reaction kettle provided in an embodiment of the utility model;

[0024] In the figure: 1. raw material mixing tank; 2. reactor; 3. separator; 4. vacuum purification tank; 5. controller; 6. feed pump; 7. feed pipeline; 8. separation pipeline; 9. water phase outlet; 10. polyether polyol outlet; 11. feeding pipeline; 12. liquid level detector; 13. stirring motor; 14. stirring rod; 15. heater; 16. cavity; 17. water inlet; 18. water outlet; 19. water storage tank; 20. refrigerator; 21. circulating water pump; 22. circulating pipeline; 23. temperature detection sensor; 24. power regulator; 25. discharge valve; 26. impurity discharge valve; 27. vacuum pipeline. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0026] like Figure 1 As shown, the high-purity polyether polyol production device provided by the embodiment of the utility model includes a raw material mixing tank 1, a reaction kettle 2, a separator 3, a vacuum purification tank 4 and a controller 5.

[0027] A discharge port is provided at the lower end of the side of the raw material mixing tank 1, and the discharge port is connected to the feed port of the reactor 2 through a feed pump 6 and a feed pipeline 7; the inlet end of the separator 3 is connected to the discharge port of the reactor 2, and a plurality of separation pipes 8 connected to the inlet end of the separator 3 are installed inside the separator 3, and the separation pipes 8 are filled with a hydrophilic medium, and a water phase liquid outlet 9 is provided at the bottom of the separator 3, and a polyether polyol liquid outlet 10 is provided at the upper end of the side of the separator 3, and the polyether polyol liquid outlet 10 is connected to the vacuum purification tank 4.

[0028] Preferably, a discharge valve 25 is provided at the lower end of the side of the vacuum purification tank 4 in the embodiment of the utility model, an impurity discharge valve 26 is connected to the bottom of the vacuum purification tank 4, and the upper end of the vacuum purification tank 4 is connected to an external vacuum pipeline 27.

[0029] like Figure 2 As shown, the upper end of the raw material mixing tank 1 in the embodiment of the utility model is connected to multiple feeding pipelines 11, a liquid level detector 12 is installed on the inner side of the raw material mixing tank 1, a stirring motor 13 is installed on the bottom of the inner side of the raw material mixing tank 1, and a stirring rod 14 is connected to the upper end of the output shaft of the stirring motor 13. The liquid level detector 12 and the stirring motor 13 are respectively connected to the controller 5 through connecting lines.

[0030] like Figure 3 As shown, a heater 15 is installed at the bottom of the reactor 2 in the embodiment of the utility model, a cavity 16 is opened in the middle of the side wall of the reactor 2, and the cavity 16 is connected to an external circulation cooling device through a water inlet 17 and a water outlet 18.

[0031] Preferably, the external circulation cooling device in the embodiment of the utility model includes a water tank 19, a refrigerator 20 and a circulating water pump 21, the refrigerator 20 is installed on the inner side of the water tank 19, and the water tank 19 is connected to the water inlet 17 and the water outlet 18 through the circulating water pump 21 and the circulating pipeline 22.

[0032] Preferably, a temperature detection sensor 23 is installed inside the water storage tank 19 in the embodiment of the utility model, the refrigerator 20 is connected to a power regulator 24 via a connecting line, and the temperature detection sensor 23 and the power regulator 24 are respectively connected to the controller 5 via connecting lines.

[0033] The working principle of the utility model is: the specific steps of preparing high-purity polyether polyols by the high-purity polyether polyol production device provided in the embodiment of the utility model include:

[0034] Raw material preparation: Prepare the required raw materials, including initiators, epoxides, etc.

[0035] Mixing and dissolving: The raw materials are added into the raw material mixing tank 1 according to the proportion through the feeding pipeline 11, and the stirring motor 13 drives the stirring rod 14 to rotate so that the raw materials are fully mixed and dissolved.

[0036] Reaction: The mixed raw materials are added to the reactor 2 through the feed pump 6 and the feed pipeline 7, and a chemical reaction is carried out under the action of the heater 15 to generate polyether polyol. The external circulation cooling device can be used in conjunction with the heater 15 to achieve temperature control in the reactor 2. The refrigerator 20 cools the water in the water storage tank 19, and the circulating water pump 21 and the circulating pipeline 22 drive the cold water to circulate in the cavity 16 of the reactor 2 to achieve cooling of the reactor 2. The temperature detection sensor 23 can be used to detect the water temperature in the water storage tank 19, and the power regulator 24 can be used to adjust the power of the refrigerator 20 according to the detected water temperature.

[0037] Separation: After the reaction is completed, the reaction product is separated by the separator 3. The separation pipe 8 in the separator 3 is filled with a hydrophilic medium. Due to the hydrophilicity of the hydrophilic medium, the polyether polyol in the mixed solution first flows out at the polyether polyol outlet 10 after flowing through the hydrophilic medium, and the water phase droplets in the mixed solution are adsorbed on the surface of the hydrophilic medium after contacting with the hydrophilic medium. As the mixed solution circulates, the water phase droplets continue to gather on the surface of the hydrophilic medium. After reaching a certain volume, the water phase droplets separate from the hydrophilic medium under the action of gravity, gather at the bottom of the separator 3, and are discharged through the water phase outlet 9.

[0038] Purification: The polyether polyol enters the vacuum purification tank 4 for purification, and the vacuum line 27 provides negative pressure for the vacuum purification tank 4 to remove impurities and obtain high-purity polyether polyol.

[0039] Waste disposal: Solid waste and impurities generated during the production process are discharged through the impurity discharge valve 26 and properly disposed of.

[0040] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements should be included in the protection scope of the utility model.

Claims

1. A high-purity polyether polyol production device, characterized in that: The high-purity polyether polyol production device is provided with: A raw material mixing tank (1), a reaction kettle (2), a separator (3), a vacuum purification tank (4) and a control device; A discharge port is provided at the lower end of the side of the raw material mixing tank (1), and the discharge port is connected to the feed port of the reaction kettle (2) through a feed pump (6) and a feed pipeline (7); The inlet end of the separator (3) is connected to the discharge port of the reaction kettle (2); a plurality of separation pipes (8) connected to the inlet end of the separator (3) are installed inside the separator (3); the separation pipes (8) are filled with a hydrophilic medium; a water phase liquid outlet (9) is provided at the bottom of the separator (3); a polyether polyol liquid outlet (10) is provided at the upper end of the side of the separator (3); and the polyether polyol liquid outlet (10) is connected to the vacuum purification tank (4); The control device comprises a plurality of sensors and controllers (5) with different functions installed at different positions, and the sensors and controllers (5) are connected via a connecting line.

2. The high-purity polyether polyol production device according to claim 1, characterized in that: The upper end of the raw material mixing tank (1) is connected to a plurality of feeding pipelines (11), a liquid level detector (12) is installed on the inner side of the raw material mixing tank (1), a stirring motor (13) is installed on the inner bottom of the raw material mixing tank (1), a stirring rod (14) is connected to the upper end of the output shaft of the stirring motor (13), and the liquid level detector (12) and the stirring motor (13) are respectively connected to the controller (5) through connecting lines.

3. The high-purity polyether polyol production device according to claim 1, characterized in that: A heater (15) is installed at the bottom of the reaction kettle (2), a cavity (16) is opened in the middle of the side wall of the reaction kettle (2), and the cavity (16) is connected to an external circulation cooling device through a water inlet (17) and a water outlet (18).

4. The high-purity polyether polyol production device according to claim 3, characterized in that: The external circulation cooling device comprises a water storage tank (19), a refrigerator (20) and a circulating water pump (21); the refrigerator (20) is installed inside the water storage tank (19); and the water storage tank (19) is connected to a water inlet (17) and a water outlet (18) via a circulating water pump (21) and a circulating pipeline (22).

5. The high-purity polyether polyol production device according to claim 4, characterized in that: A temperature detection sensor (23) is installed inside the water storage tank (19), the refrigerator (20) is connected to a power regulator (24) via a connecting line, and the temperature detection sensor (23) and the power regulator (24) are respectively connected to a controller (5) via connecting lines.

6. The high-purity polyether polyol production device according to claim 1, characterized in that: A discharge valve (25) is provided at the lower end of the side of the vacuum purification tank (4), an impurity discharge valve (26) is connected to the bottom of the vacuum purification tank (4), and the upper end of the vacuum purification tank (4) is connected to an external vacuum extraction pipeline (27).

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