Reaction equipment for producing bio-based polyester polyol

Abstract

The utility model relates to the technical field of bio-based polyester polyol production, and discloses reaction equipment for bio-based polyester polyol production, which comprises a heating jacket, a reaction kettle body and a plurality of feeding pipes, the other side of the top end of the reaction kettle body is fixedly provided with a charging pipe, the middle part of the inner cavity of the reaction kettle body is provided with a stirring assembly for stirring raw materials, and the heating jacket is arranged in the inner cavity of the reaction kettle body. The stirring assembly comprises a connecting rod located at a middle shaft of an inner cavity of the reaction kettle body, a guide plate is fixedly connected to the top end of the connecting rod, a plurality of stirring blades are fixedly connected to the outer surface of the connecting rod at equal intervals, and supporting rods are fixedly connected to the two sides of the outer surface of the connecting rod at equal intervals; one end, far away from the connecting rod, of the supporting rod is fixedly connected with a scraping plate for cleaning raw material residues on the inner wall of equipment, different raw materials are respectively added through the plurality of feeding pipes, pipeline blockage caused by simultaneous adding is avoided, the raw materials are stirred and mixed through the stirring blades, and meanwhile, the surface of the inner wall of the reaction kettle body is cleaned through the scraping plate.

Description

Technical Field

[0001] The utility model relates to the technical field of biobased polyester polyol production, and more specifically to a reaction device for biobased polyester polyol production. Background Art

[0002] Biobased polyester polyol is a kind of polymer material, a biodegradable polymer, usually prepared by using renewable biomass as raw material, with good biocompatibility, heat resistance, chemical corrosion resistance, etc. At the same time, biobased polyester polyol uses renewable biomass as raw material, so it has the characteristics of green and low carbon. The preparation methods of biobased polyester polyol mainly include transesterification method, ether esterification method and polymerization method, etc. Therefore, reaction equipment is needed during production, and it has been widely used in the fields of coatings, adhesives, polyurethane foams, etc.

[0003] Deficiencies of the prior art: Since biobased polyester polyol is produced by mixing multiple raw materials and reacting them, after the raw materials are added, a stirring operation will be carried out. In the reaction equipment of the prior art, it is easy to have residual raw materials on the inner wall of the equipment after stirring, and subsequent manual cleaning is required, which increases the operation difficulty. At the same time, adding raw materials through a single feed pipe is likely to cause blockage of the feed pipe, affecting the working efficiency of the reaction equipment. Summary of the Utility Model

[0004] In order to overcome the above defects of the prior art, the utility model provides a reaction device for biobased polyester polyol production to solve the problems that it is easy to have residual raw materials on the inner wall of the equipment after stirring and adding raw materials through a single feed pipe is likely to cause blockage of the feed pipe in the above background art.

[0005] The utility model provides the following technical solutions: A reaction device for biobased polyester polyol production, including a heating jacket, a reaction kettle body is arranged in the inner cavity of the heating jacket. On one side of the top of the reaction kettle body, a plurality of feed pipes are fixedly installed, and on the other side of the top of the reaction kettle body, a feeding pipe is fixedly installed. In the middle of the inner cavity of the reaction kettle body, a stirring assembly is arranged for stirring raw materials;

[0006] The stirring assembly includes a connecting rod located at the central axis of the inner cavity of the reaction kettle body. The top of the connecting rod is fixedly connected with a flow guide plate. The outer surface of the connecting rod is equidistantly fixedly connected with a plurality of stirring blades. On both sides of the outer surface of the connecting rod, support rods are equidistantly fixedly connected. The end of the support rod far away from the connecting rod is fixedly connected with a scraping plate for cleaning the residual raw materials on the inner wall of the equipment.

[0007] Preferably, a motor is fixedly installed in the middle of the top end of the reactor body. A fixed block is fixedly connected to the top end inside the reactor body. The output end of the motor fixedly penetrates through the fixed block and is fixedly connected to the top end of a connecting rod. A flow guide plate is fixedly connected to the bottom end of the fixed block.

[0008] Preferably, the flow guide plate is located in the upper part of the inner cavity of the reactor body, and the top end of the flow guide plate is arc-shaped.

[0009] Preferably, the length of the support rod is adapted to the inner cavity radius size of the reactor body, and the scraping plate is in contact with the inner wall surface of the reactor body.

[0010] Preferably, a support frame is fixedly connected to the lower part of the outer surface of the heating jacket. Air inlet pipes are fixedly connected to both sides of the outer surface of the heating jacket. Two drain pipes are fixedly connected to the bottom end of the heating jacket at equal intervals. A discharge pipe is fixedly connected to the middle of the bottom end of the reactor body.

[0011] Preferably, the air inlet pipe is connected and communicated with the cavity formed between the heating jacket and the reactor body, and the bottom end of the discharge pipe penetrates through the middle of the bottom end of the heating jacket.

[0012] The technical effects and advantages of the present utility model:

[0013] 1. By providing a plurality of feed pipes to add raw materials, different raw materials are added through different feed pipes, avoiding the situation of blockage in the inner cavity of the pipeline caused by adding raw materials through one feed pipe at the same time. Additives such as catalysts required for the reaction can also be added through the feeding pipe. The flow guide plate in the inner cavity of the reactor body plays a buffering role for the added raw materials, uniformly enters the inner cavity of the reactor body, increases the mixing uniformity, and improves the reaction efficiency.

[0014] 2. By providing a stirring assembly to stir and mix the added raw materials, the raw materials are evenly mixed by the rotating stirring blades, improving the reaction efficiency of the raw materials. At the same time, after the raw materials are added, part of them remains on the inner wall of the reactor body. As the connecting rod rotates, the scraping plate moves on the inner wall surface of the reactor body, cleaning the remaining raw materials, reducing resource waste, and facilitating the cleaning of the inner wall of the equipment after the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic cross-sectional structure diagram of the whole of the present utility model.

[0016] Figure 2 is a schematic diagram of the whole structure of the present utility model.

[0017] Figure 3 is a schematic diagram of the stirring assembly structure of the present utility model.

[0018] Figure 4This is a schematic cross-sectional structure diagram of another perspective of the overall structure of the present utility model.

[0019] The reference numerals are: 1, heating jacket; 2, reaction kettle body; 3, support frame; 4, inlet pipe; 5, feed pipe; 6, dosing pipe; 7, stirring assembly; 71, motor; 72, fixed block; 73, deflector plate; 74, connecting rod; 75, stirring blade; 76, support rod; 77, scraper; 8, drain pipe; 9, discharge pipe. Specific embodiments

[0020] Next, the technical solutions in the present utility model will be clearly and completely described in conjunction with the drawings in the present utility model. In addition, the forms of each structure described in the following embodiments are merely examples, and a reaction device for producing bio-based polyester polyol involved in the present utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0021] The present utility model provides a reaction device for producing bio-based polyester polyol, as Figure 1 - Figure 4 shown, which includes a heating jacket 1. A reaction kettle body 2 is arranged in the inner cavity of the heating jacket 1. A plurality of feed pipes 5 are fixedly installed on one side of the top end of the reaction kettle body 2. Different raw materials are added through different feed pipes 5 to avoid blockage of the inner cavity of the pipeline caused by adding through one feed pipe 5 at the same time, which affects the reaction effect of the raw materials. A dosing pipe 6 is fixedly installed on the other side of the top end of the reaction kettle body 2. Additives such as catalysts required for the reaction are added through the dosing pipe 6. A stirring assembly 7 for stirring the raw materials is arranged in the middle of the inner cavity of the reaction kettle body 2.

[0022] Further, as Figure 3 shown, the stirring assembly 7 includes a connecting rod 74 located at the central axis of the inner cavity of the reaction kettle body 2. A deflector plate 73 is fixedly connected to the top end of the connecting rod 74. A plurality of stirring blades 75 are equidistantly fixedly connected to the outer surface of the connecting rod 74. After the raw materials are added, they are stirred and mixed by the stirring blades 75. Support rods 76 are equidistantly fixedly connected to both sides of the outer surface of the connecting rod 74. One end of the support rod 76 far from the connecting rod 74 is fixedly connected to a scraper 77 for cleaning the raw material residues on the inner wall.

[0023] Further, as Figure 4As shown in the figure, a motor 71 is fixedly installed in the middle of the top end of the reactor body 2. A fixing block 72 is fixedly connected to the top end inside the reactor body 2. The output end of the motor 71 fixedly penetrates through the fixing block 72 and is fixedly connected to the top end of the connecting rod 74. A flow guide plate 73 is fixedly connected to the bottom end of the fixing block 72. The flow guide plate 73 is located in the upper part of the inner cavity of the reactor body 2. The top end of the flow guide plate 73 is arc-shaped. The raw materials enter the inner cavity of the reactor body 2 through the feed pipe 5. The arc-shaped flow guide plate 73 plays a buffering role, avoiding accumulation and affecting the reaction effect between the raw materials.

[0024] Furthermore, the length of the support rod 76 is adapted to the inner cavity radius size of the reactor body 2. The scraper 77 is in contact with the inner wall surface of the reactor body 2. When the connecting rod 74 drives the stirring blade 75 to stir the raw materials, the scraper 77 rotates on the inner wall of the reactor body 2 as the connecting rod 74 rotates, cleaning the raw materials remaining on the inner wall of the reactor body 2. While reducing resource waste, it ensures the reaction effect of raw material mixing and facilitates the cleaning of the inner wall of the equipment.

[0025] Furthermore, a support frame 3 is fixedly connected to the lower part of the outer surface of the heating jacket 1. Air inlet pipes 4 are fixedly connected to both sides of the outer surface of the heating jacket 1. Two drain pipes 8 are fixedly connected to the bottom end of the heating jacket 1 at equal intervals. A discharge pipe 9 is fixedly connected to the middle of the bottom end of the reactor body 2. The air inlet pipe 4 is connected and communicated with the cavity formed between the heating jacket 1 and the reactor body 2. The air inlet pipe 4 is communicated with the output end of an external steam heater. The reactor body 2 is heated by the steam heater to ensure the normal operation of the reaction process. The liquid generated during the heating process is discharged through the drain pipe 8. The bottom end of the discharge pipe 9 penetrates through the middle of the bottom end of the heating jacket 1, and the product generated by the reaction is discharged through the discharge pipe 9 for subsequent process operations.

[0026] Working principle of the utility model: Firstly, different reaction raw materials are added through different feed pipes 5 to avoid clogging of the inner cavity of the pipeline caused by adding through a single feed pipe 5 at the same time. After the addition is completed, other additives such as catalysts required during the reaction are added through the feed pipe 6. Then, the intake pipe 4 is connected to the output end of an external steam heater, and steam enters the cavity formed between the heating jacket 1 and the reaction kettle body 2. The reaction kettle body 2 is heated by the steam heater. During the heating process, the liquid generated by the steam is discharged through the drain pipe 8. After the raw materials are added, the motor 71 is started. The motor 71 drives the connecting rod 74 to drive the stirring blade 75 to rotate. The various raw materials in the inner cavity of the reaction kettle body 2 are mixed and stirred by the stirring blade 75 to ensure the reaction effect. With the rotation of the stirring blade 75 and the heating of the steam heater, the normal operation of the reaction process is ensured. Since there will be raw materials remaining on the inner wall of the reaction kettle body 2 during the addition process, when the connecting rod 74 rotates, it drives the scraper 77 to move on the inner wall of the reaction kettle body 2, so that the raw materials remaining on the inner wall of the reaction kettle body 2 are cleaned up, reducing resource waste and facilitating the cleaning of the inner wall of the equipment. The product after the reaction is discharged through the discharge pipe 9 for the next process.

[0027] Finally, several points should be noted: Firstly, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0028] Secondly: In the attached drawings of the disclosed embodiments of the utility model, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0029] Finally: The above description is only the preferred embodiment of the utility model and is not used to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A reaction device for producing bio-based polyester polyols, comprising a heating jacket (1), wherein the inner cavity of the heating jacket (1) is provided with a reaction kettle body (2), characterized in that: A plurality of feed pipes (5) are fixedly mounted on one side of the top of the reactor body (2), a feed pipe (6) is fixedly mounted on the other side of the top of the reactor body (2), and a stirring assembly (7) for stirring the raw materials is arranged in the middle of the inner cavity of the reactor body (2); The stirring assembly (7) comprises a connecting rod (74) located at the central axis of the inner cavity of the reaction kettle body (2); a guide plate (73) is fixedly connected to the top end of the connecting rod (74); a plurality of stirring blades (75) are fixedly connected to the outer surface of the connecting rod (74) at equal distances; support rods (76) are fixedly connected to both sides of the outer surface of the connecting rod (74) at equal distances; and a scraper (77) for cleaning the residual raw materials on the inner wall is fixedly connected to one end of the support rod (76) away from the connecting rod (74).

2. The reaction equipment for producing bio-based polyester polyols according to claim 1, characterized in that: A motor (71) is fixedly mounted at the middle of the top of the reactor body (2); a fixed block (72) is fixedly connected to the top of the inner cavity of the reactor body (2); an output end of the motor (71) is fixedly passed through the fixed block (72) and is fixedly connected to the top of a connecting rod (74); and a guide plate (73) is fixedly connected to the bottom of the fixed block (72).

3. The reaction equipment for producing bio-based polyester polyols according to claim 1, characterized in that: The guide plate (73) is located at the upper part of the inner cavity of the reaction kettle body (2), and the top end of the guide plate (73) is arranged in an arc shape.

4. The reaction equipment for producing bio-based polyester polyols according to claim 1, characterized in that: The length of the support rod (76) is adapted to the radius of the inner cavity of the reaction kettle body (2), and the scraper (77) is in contact with the inner wall surface of the reaction kettle body (2).

5. The reaction equipment for producing bio-based polyester polyol according to claim 1, characterized in that: A support frame (3) is fixedly connected to the lower portion of the outer surface of the heating jacket (1), air inlet pipes (4) are fixedly connected to both sides of the outer surface of the heating jacket (1), two drainage pipes (8) are fixedly connected to the bottom end of the heating jacket (1) at equal distances, and a discharge pipe (9) is fixedly connected to the middle portion of the bottom end of the reactor body (2).

6. The reaction equipment for producing bio-based polyester polyol according to claim 5, characterized in that: The air inlet pipe (4) is connected to the cavity formed between the heating jacket (1) and the reaction kettle body (2), and the bottom end of the discharge pipe (9) passes through the middle of the bottom end of the heating jacket (1).

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