A pilot reactor for preparing polyester polyols

Abstract

The utility model discloses a pilot test kettle for preparing polyester polyols, comprising a kettle body, a feeding port is installed on one side above the kettle body, a first stirring shaft is installed inside the kettle body, a horizontal stirring rod is installed on the outer wall of the first stirring shaft, a first motor is installed above the first stirring shaft, a vertical stirring rod is installed on the outer wall of the second stirring shaft, and a second motor is connected to one end of the second stirring shaft; a water tank is installed on both sides below the kettle body, a lifting pump is installed above the water tank, a delivery pipeline is connected above the lifting pump, one end of the delivery pipeline is connected to a hot water cavity, and a heating rod is installed inside the hot water cavity. Compared with the existing device, the pilot test kettle for preparing polyester polyols can extract the liquid in the water tank and deliver it to the hot water cavity through the lifting pump and the delivery pipeline, and the heating rod can heat the water in the hot water cavity, so as to provide the required heat for the kettle body.

Description

Technical Field

[0001] The utility model relates to the technical field of polyester polyol preparation, in particular to a pilot reactor for preparing polyester polyol. Background Art

[0002] Polyester polyols include conventional polyester polyols, polycaprolactone polyols and polycarbonate diols, which contain ester groups or carbonate groups. However, polyester polyols generally referred to are polyester polyols obtained by polycondensation of dicarboxylic acids and diols. Polyester polyols are one of the main raw materials for polyester polyurethanes. A pilot reactor for preparing polyester polyols is required in the preparation process of polyester polyols.

[0003] The Chinese patent with the authorization publication number CN220143397U discloses a pilot reactor for preparing polyester polyols, including a reactor body, a stirring shaft is arranged in the reactor body, a first motor driving the stirring shaft to rotate is arranged on the reactor body, a plurality of pairs of first stirring rods are arranged on the stirring shaft from top to bottom, an annular block is arranged at the top of the reactor body, an annular chute is concavely arranged on the outer wall of the annular block, an annular slider convexly arranged on the inner wall of the reactor body and slidingly connected with the annular chute, a pair of vertical rods are fixed on the bottom surface of the annular block, a plurality of second stirring rods are convexly arranged on the end surface of the vertical rod facing the stirring shaft, annular teeth are convexly arranged on the inner wall of the annular block, a gear meshing with the annular teeth is arranged in the reactor body, a second motor is fixed on the reactor body, and the output end of the second motor extends into the reactor body and is connected to the gear and drives the gear to rotate. The pilot reactor improves the uniformity of raw material mixing, the efficiency of raw material mixing, and the efficiency of reaction between raw materials through structural coordination.

[0004] Although the pilot reactor for preparing polyester polyols mentioned above improves the uniformity of raw material mixing and the efficiency of raw material mixing through structural coordination, the device lacks a heating structure for the raw material preparation process, so the raw materials need to be heated before adding them, and the temperature will gradually decrease during the preparation process, making it difficult to maintain the temperature required for the preparation. For this reason, we propose a pilot reactor for preparing polyester polyols. Utility Model Content

[0005] The utility model aims to provide a pilot reactor for preparing polyester polyols, so as to solve the problem in the above-mentioned background technology that due to the lack of a heating structure in the raw material preparation process on the device, the raw materials need to be heated before adding them, and the temperature will gradually decrease during the preparation process, making it difficult to maintain the temperature required for the preparation.

[0006] To achieve the above object, the utility model provides the following technical solution: a pilot reactor for preparing polyester polyols, comprising:

[0007] A kettle body, wherein a feed port is installed on one side above the kettle body, a first stirring shaft is installed inside the kettle body, a transverse stirring rod is installed on the outer wall of the first stirring shaft, and a first motor is installed above the first stirring shaft;

[0008] A material discharge port is arranged on both sides below the first stirring shaft, a blocking plate is installed below the material discharge port, and a bidirectional hydraulic rod is connected to the middle of the blocking plate;

[0009] A second stirring shaft, which is installed below the bidirectional hydraulic rod, a vertical stirring rod is installed on the outer wall of the second stirring shaft, and a second motor is connected to one end of the second stirring shaft;

[0010] A water storage tank is installed on both sides below the kettle body, a lifting pump is installed above the water storage tank, and a delivery pipe is connected to the top of the lifting pump, one end of the delivery pipe is connected to a hot water chamber, and a heating rod is installed inside the hot water chamber.

[0011] Preferably, the feed inlet is further provided with:

[0012] A sealing cover is installed above the feed port, and telescopic push rods are connected to both sides below the sealing cover, and a telescopic structure is formed between the telescopic push rods and the sealing cover.

[0013] Preferably, the first motor forms a rotating structure through the first stirring shaft and the transverse stirring rods, and the transverse stirring rods are equidistantly distributed.

[0014] Preferably, the blocking plate corresponds to the position of the feed opening, and a telescopic structure is formed between the bidirectional hydraulic rod and the blocking plate.

[0015] Preferably, the second motor forms a rotating structure through the second stirring shaft and the vertical stirring rods, and the second motor is evenly distributed between the vertical stirring rods.

[0016] Preferably, the water storage tanks are symmetrically distributed about the vertical center line of the kettle body, and the water storage tanks form a communication structure with the hot water chamber through the lifting pump and the delivery pipeline.

[0017] Preferably, the heating rods are equidistantly distributed along the interior of the hot water chamber, and the hot water chamber is connected to the water storage tank through a downpipe.

[0018] Compared with the prior art, the utility model provides a pilot reactor for preparing polyester polyols, which has the following beneficial effects:

[0019] The utility model can extract the liquid in the water tank and transport it to the hot water chamber through the lifting pump and the delivery pipeline. The heating rod can heat the water in the hot water chamber, so as to provide the required heat for the kettle body, avoiding the problem that there is a lack of heating structure in the raw material preparation process on the device, so that the raw materials need to be heated before adding them, and the temperature will gradually decrease during the preparation process, making it difficult to maintain the required temperature for the preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the kettle body and the water storage tank of the utility model;

[0022] Figure 3 It is a bottom view structural schematic diagram of the blocking plate of the utility model.

[0023] In the figure: 1. kettle body; 2. feed inlet; 3. sealing cover; 4. telescopic push rod; 5. first motor; 6. first stirring shaft; 7. horizontal stirring rod; 8. discharge port; 9. bidirectional hydraulic rod; 10. blocking plate; 11. second motor; 12. second stirring shaft; 13. vertical stirring rod; 14. water storage tank; 15. lifting pump; 16. delivery pipeline; 17. hot water chamber; 18. heating rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-2A pilot reactor for preparing polyester polyols, comprising: a reactor body 1, a feed port 2 is installed on one side above the reactor body 1, a sealing cover 3 is installed above the feed port 2, and both sides below the sealing cover 3 are connected with telescopic push rods 4, and a telescopic structure is formed between the telescopic push rod 4 and the sealing cover 3; the telescopic push rod 4 can drive the sealing cover 3 to move in the vertical direction, so as to facilitate the opening and closing of the feed port 2, and to improve the airtightness of the device during the reaction process; a first stirring shaft 6 is installed inside the reactor body 1, and a transverse stirring rod 7 is installed on the outer wall of the first stirring shaft 6, and the first stirring shaft 6 is provided with a first stirring rod 7. A first motor 5 is installed above the mixing shaft 6; the first motor 5 forms a rotating structure through the first mixing shaft 6 and the horizontal mixing rod 7, and the horizontal mixing rods 7 are equidistantly distributed; the first motor 5 can drive the first mixing shaft 6 and the horizontal mixing rod 7 to rotate, and the rotating horizontal mixing rod 7 can perform the first mixing of the raw materials; the second mixing shaft 12 is installed below the bidirectional hydraulic rod 9, and the outer wall of the second mixing shaft 12 is installed with a vertical mixing rod 13, and one end of the second mixing shaft 12 is connected to the second motor 11; the second motor 11 is connected to the vertical mixing rod 13 through the second mixing shaft 12 A rotating structure is formed between the vertical stirring rods 13, and the vertical stirring rods 13 are evenly distributed; the second motor 11 can drive the second stirring shaft 12 and the vertical stirring rod 13 to rotate, and the rotating vertical stirring rod 13 can perform secondary stirring on the material. Through the two stirrings in different directions, the uniformity of the material can be improved; a water storage tank 14 is installed on both sides below the kettle body 1, and a lifting pump 15 is installed above the water storage tank 14, and a conveying pipeline 16 is connected to the lifting pump 15. The water storage tank 14 is symmetrically distributed about the vertical center line of the kettle body 1, and the storage tank 14 is symmetrically distributed about the vertical center line of the kettle body 1. The water tank 14 is connected to the hot water chamber 17 through the lifting pump 15 and the delivery pipe 16; the liquid in the water tank 14 can be pumped out and delivered to the hot water chamber 17 through the lifting pump 15 and the delivery pipe 16; one end of the delivery pipe 16 is connected to the hot water chamber 17, and a heating rod 18 is installed inside the hot water chamber 17; the heating rods 18 are equidistantly distributed along the inside of the hot water chamber 17, and the hot water chamber 17 is connected to the water tank 14 through the downpipe; the heating rod 18 can heat the water in the hot water chamber 17, thereby providing the required heat for the kettle body 1.

[0026] See also Figure 1 and 3 A pilot reactor for preparing polyester polyols comprises: a feed port 8, which is arranged on both sides below a first stirring shaft 6, a blocking plate 10 is installed below the feed port 8, and a bidirectional hydraulic rod 9 is connected to the middle of the blocking plate 10; the blocking plate 10 corresponds to the position of the feed port 8, and a telescopic structure is formed between the bidirectional hydraulic rod 9 and the blocking plate 10; the bidirectional hydraulic rod 9 can drive the blocking plate 10 to move in the horizontal direction, so as to facilitate the opening and closing of the feed port 8, and after the feed port 8 is opened, it is convenient for the material to flow downward.

[0027] Working principle: When using the pilot reactor for preparing polyester polyol, firstly, feed the raw materials into the reactor body 1 through the feed port 2, start the telescopic push rod 4, and the telescopic push rod 4 drives the sealing cover 3 to move in the vertical direction, so as to close the feed port 2 and improve the airtightness of the device; secondly, start the lifting pump 15, and extract the liquid in the water tank 14 through the lifting pump 15 and the conveying pipe 16 and convey it to the hot water chamber 17, and then energize the heating rod 18, and the heating rod 18 heats the water in the hot water chamber 17, so as to provide the required heat for the reactor body 1; then start the first motor 5, and the first motor 5 drives the first stirring shaft 6 and the horizontal stirring rod 7 to rotate, and the rotation The horizontal stirring rod 7 can stir the raw materials for the first time. After the stirring is completed, the two-way hydraulic rod 9 is started, and the two-way hydraulic rod 9 drives the blocking plate 10 to move in the horizontal direction, so as to facilitate the opening and closing of the discharge port 8. After the discharge port 8 is opened, it is convenient for the material to flow downward; finally, the second motor 11 is started, and the second motor 11 drives the second stirring shaft 12 and the vertical stirring rod 13 to rotate. The rotating vertical stirring rod 13 can stir the material for the second time. Through the two stirrings in different directions, the uniformity of the material can be improved. After the stirring is completed, the discharge port is opened to facilitate the outflow of the material. This is the working principle of the pilot reactor for preparing polyester polyols.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pilot reactor for preparing polyester polyols, characterized in that: include: A kettle body (1), wherein a feed inlet (2) is installed on one side above the kettle body (1), a first stirring shaft (6) is installed inside the kettle body (1), and a transverse stirring rod (7) is installed on the outer wall of the first stirring shaft (6), and a first motor (5) is installed above the first stirring shaft (6); A feed opening (8) is arranged on both sides below the first stirring shaft (6); a blocking plate (10) is installed below the feed opening (8), and a bidirectional hydraulic rod (9) is connected to the middle of the blocking plate (10); A second stirring shaft (12) is installed below the bidirectional hydraulic rod (9), a vertical stirring rod (13) is installed on the outer wall of the second stirring shaft (12), and one end of the second stirring shaft (12) is connected to a second motor (11); A water storage tank (14) is installed on both sides below the kettle body (1), a lifting pump (15) is installed above the water storage tank (14), and a delivery pipe (16) is connected to the top of the lifting pump (15), one end of the delivery pipe (16) is connected to a hot water chamber (17), and a heating rod (18) is installed inside the hot water chamber (17).

2. A pilot reactor for preparing polyester polyol according to claim 1, characterized in that: The feed inlet (2) is also provided with: A sealing cover (3) is installed above the feed port (2), and telescopic push rods (4) are connected to both sides below the sealing cover (3), and a telescopic structure is formed between the telescopic push rods (4) and the sealing cover (3).

3. The pilot reactor for preparing polyester polyol according to claim 1, characterized in that: The first motor (5) forms a rotating structure through the first stirring shaft (6) and the transverse stirring rods (7), and the transverse stirring rods (7) are equidistantly distributed.

4. The pilot reactor for preparing polyester polyol according to claim 1, characterized in that: The blocking plate (10) corresponds to the position of the feed opening (8), and a telescopic structure is formed between the bidirectional hydraulic rod (9) and the blocking plate (10).

5. The pilot reactor for preparing polyester polyol according to claim 1, characterized in that: The second motor (11) forms a rotating structure through the second stirring shaft (12) and the vertical stirring rods (13), and the vertical stirring rods (13) are evenly distributed.

6. The pilot reactor for preparing polyester polyol according to claim 1, characterized in that: The water storage tank (14) is symmetrically distributed about the vertical center line of the kettle body (1), and the water storage tank (14) forms a communication structure with the hot water chamber (17) through the lifting pump (15) and the delivery pipeline (16).

7. The pilot reactor for preparing polyester polyol according to claim 1, characterized in that: The heating rods (18) are distributed at equal distances along the interior of the hot water chamber (17), and the hot water chamber (17) is connected to the water storage tank (14) through a downpipe.

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