Separation system and method for efficiently separating catalyst in production of polytetrahydrofuran

Abstract

The invention belongs to the field of polytetrahydrofuran production, and particularly relates to a separation system and method based on efficient catalyst separation in polytetrahydrofuran production, the separation system comprises a protective shell, the top end of the protective shell is fixedly connected with a cover plate, the cover plate is fixedly connected with a servo motor and an air cylinder, an output shaft of the servo motor is fixedly connected with a rotating rod, and the rotating rod is fixedly connected with the air cylinder. An inserting rod is inserted into the rotating rod, the bottom end of the inserting rod is fixedly connected with a connecting block, and the bottom end of the connecting block is fixedly connected with a long rod; through the structural design of the driving mechanism, the long rod can normally drive the stirring rod to rotate, reaction of raw materials in the reaction cylinder is accelerated, the long rod can drive the reaction cylinder to rotate after the long rod moves upwards and is separated from the stirring rod, so that a solid catalyst left in a product is separated from the product through centrifugal force, and the reaction efficiency is improved. Further, the solid catalyst is efficiently separated, so that subsequent further purification is facilitated, and the time for separating the solid catalyst from a product is shortened.

Description

Technical Field

[0001] The invention relates to the field of polytetrahydrofuran production, in particular to a separation system and method based on efficient separation of catalysts in polytetrahydrofuran production. Background Art

[0002] Polytetrahydrofuran is an important chemical raw material. In the process of preparing polytetrahydrofuran, solid catalysts are often used to accelerate the reaction. After the reaction is completed, the solid catalyst and polytetrahydrofuran need to be separated to improve the purity of the product.

[0003] According to the patent document CN202322282534.5, a raw material reactor for compound preparation includes a reaction box and a motor 1, the surface of the reaction box is connected to the motor 1, and the interior of the reaction box is embedded with a rotating shaft, and one end of the rotating shaft passes through the surface of the reaction box and is connected to the output shaft of the motor 1, the surface of the rotating shaft is fixedly sleeved with a stirring fan and a baffle, and the surface of the rotating shaft is fixedly connected with a scraper 1, and the other end of the rotating shaft is embedded with a groove, and a sliding rod is slidably installed inside the groove. The raw material reactor for compound preparation is provided with a scraper 1 and a scraper 2, and the raw materials fall on the surface of the baffle, and the raw materials fall into the reaction box along the surface of the baffle, so that the raw materials merge with each other more quickly, and a scraper 1 is provided to prevent the raw materials from sinking to the bottom and sticking to the inner wall of the reaction box, and the scraper 2 can clean the discharge port of the reaction box to prevent clogging during discharge and improve work efficiency.

[0004] However, in the raw material reactor of the above technology, when using a solid catalyst to prepare polytetrahydrofuran, part of the solid catalyst may interact with the reactants and products or produce adsorption, resulting in part of the catalyst remaining in the product. After the preparation is completed, the reactor needs to be left standing for a period of time so that the solid catalyst can settle down and facilitate subsequent separation, which will consume a lot of time and cannot efficiently separate the solid catalyst, resulting in a longer preparation time. Therefore, in view of the above problems, a separation system and method based on efficient separation of catalysts in polytetrahydrofuran production are proposed. Summary of the invention

[0005] In order to solve the problem that in the raw material reactor in the above technology, when using a solid catalyst to prepare polytetrahydrofuran, part of the solid catalyst may interact with the reactants and products or produce adsorption, resulting in part of the catalyst remaining in the product. After the preparation is completed, the reactor needs to be left standing for a period of time so that the solid catalyst can settle down to facilitate subsequent separation, which will consume a lot of time and cannot efficiently separate the solid catalyst, resulting in a longer preparation time. The present invention proposes a separation system and method based on efficient separation of catalysts in polytetrahydrofuran production.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the separation system based on efficient separation of catalyst in polytetrahydrofuran production according to the present invention comprises a protective shell, the top of the protective shell is fixedly connected with a cover plate, the cover plate is fixedly connected with a servo motor and a cylinder, the output shaft of the servo motor is fixedly connected with a rotating rod, a plug rod is inserted inside the rotating rod, the bottom end of the plug rod is fixedly connected with a connecting block, the bottom end of the connecting block is fixedly connected with a long rod, a driving mechanism is arranged on the long rod, the driving mechanism can drive the reaction tube to rotate by rotating the long rod when the long rod moves upward to the maximum position, so as to realize efficient separation of solid catalyst and product by centrifugal force, the long rod passes through the bottom end of the placement tube and the top end of the moving plate, the moving plate is fixedly connected to the top end of the placement tube, a solid catalyst is placed inside the placement tube, a pressing mechanism is arranged inside the placement tube, and the pressing mechanism can press the solid catalyst inside the placement tube to avoid frequent collision between the solid catalyst and the inner wall of the placement tube when the reaction tube rotates.

[0007] Preferably, the driving mechanism includes a fixing rod, the top end of the fixing rod is fixedly connected to the cylinder, the fixing rod is L-shaped, a guide rod is inserted on the fixing rod, the top end of the guide rod is fixedly connected to the bottom end of the cover plate, the bottom end of the guide rod is fitted with the top end of the fixing plate, the bottom end of the fixing rod is fitted with the top end of the fixing plate, the bottom end of the fixing rod is fixedly connected to the ring, the ring is rotatably connected to the connecting block, two groups of clamping blocks are fixedly connected near the middle of the long rod, the clamping blocks are located directly below the fixing blocks, and the fixing blocks The bottom end of the fixing plate is fixedly connected, a slot is provided inside the fixing block, the bottom end of the long rod is inserted into the inside of the stirring rod, the bottom end of the stirring rod is fixedly connected with a connecting piece, the cross section of the connecting piece is T-shaped, the connecting piece passes through the bottom end of the protective shell and the reaction cylinder, the reaction cylinder is fixedly connected with a fixing ring, the top and bottom ends of the fixing ring are both provided with limiting rings, the limiting ring is fixedly connected to the inner wall of the protective shell, the bottom end of the reaction cylinder is in contact with three sets of supporting wheels, and the supporting wheels are fixedly connected to the inner wall of the protective shell.

[0008] Preferably, the clamping mechanism includes a movable plate, the middle part of which is penetrated by a long rod, and spiral lines are provided on the movable plate and the long rod. The top of the movable plate is fixedly connected to four groups of support columns, and the top of the support columns is fixedly connected to the bottom end of the fixed plate. The side and bottom of the placement tube are provided with multiple groups of mesh holes, and the bottom end of the movable plate is fixedly connected to an annular baffle, which fits the inner wall of the placement tube, and a partition assembly is provided inside the placement tube.

[0009] Preferably, the partition assembly includes a partition, the top end of the partition is fixedly connected to four groups of fixed columns, the inner wall of the fixed column is fixedly connected to a connecting spring, the top end of the connecting spring is fixedly connected to the bottom end of the connecting column, the bottom end portion of the connecting column is inserted into the fixed column, the top end of the connecting column is fixedly connected to the movable plate, a circular hole is opened in the middle of the partition, the radius of the circular hole is larger than the radius of the long rod, and the radius of the partition is smaller than the radius of the annular baffle.

[0010] Preferably, the support column is designed to be L-shaped, and the bottom end of the support column is in contact with the top end of the movable plate.

[0011] Preferably, a long groove is formed at the bottom end of the connecting piece, and the long groove is parallel to the stirring rod.

[0012] Preferably, a second feed inlet is provided at the top of the fixed plate, the second feed inlet is located directly below the first feed inlet, and the first feed inlet is provided on the cover plate.

[0013] Preferably, a plurality of groups of balls are rotatably connected inside the fixing ring, the top and bottom ends of the balls are both in contact with the limiting ring, and the balls are in contact with the inner wall of the protective shell.

[0014] A separation method based on efficient separation of catalyst in polytetrahydrofuran production, the method comprising the following steps:

[0015] S1, start the servo motor, the long rod drives the stirring rod to rotate, and stirs the raw materials inside the reaction tube to speed up the reaction;

[0016] S2. After the reaction is completed, the servo motor stops rotating, and then the cylinder is started to drive the long rod to move upward. The bottom end of the long rod is separated from the stirring rod and no longer drives the stirring rod to rotate. When the long rod moves upward to the maximum position, the fixed block on the long rod will be stuck in the slot. At this time, the rotation of the long rod can drive the reaction tube to rotate. Then the servo motor is started again, and the long rod drives the reaction tube to rotate, and the solid catalyst and the product are separated by centrifugal force.

[0017] S3. After separation is completed, the upper clear liquid inside the reaction cylinder is extracted through the first feed inlet and the second feed inlet for subsequent purification and processing.

[0018] The present invention is beneficial in that:

[0019] 1. The present invention adopts the structural design of the driving mechanism, and the long rod can normally drive the stirring rod to rotate, thereby accelerating the reaction of the raw materials inside the reaction tube. After the long rod moves upward and separates from the stirring rod, the long rod can drive the reaction tube to rotate, thereby separating the solid catalyst remaining in the product from the product through centrifugal force, and then efficiently separating the solid catalyst to facilitate subsequent further purification, and reducing the time for separating the solid catalyst from the product. This solves the problem of the raw material reactor in the prior art that when using a solid catalyst to prepare polytetrahydrofuran, part of the solid catalyst may interact with the reactant and the product or produce adsorption, resulting in part of the catalyst remaining in the product. After the preparation is completed, the reactor needs to be left to stand for a period of time so that the solid catalyst can settle down to facilitate subsequent separation, which will consume more time and cannot efficiently separate the solid catalyst, resulting in a longer preparation time.

[0020] 2. The present invention adopts the structural design of the clamping mechanism. When separating the solid catalyst and the product, the movable plate will move downward along the long rod to clamp and fix the solid catalyst inside the placement tube, thereby preventing the solid catalyst inside the placement tube from frequently colliding with the inner wall of the placement tube during the rotation of the reaction tube, resulting in the generated catalyst powder and smaller particles entering the product through the mesh holes on the placement tube.

[0021] 3. The present invention adopts the structural design of the partition assembly, and the partition can provide support for the solid catalyst to prevent the solid catalyst from being completely accumulated at the bottom of the placement cylinder, so as to increase the contact area between the solid catalyst and the raw material and accelerate the reaction speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure inside the reaction tube of the present invention;

[0026] Figure 4 It is a schematic diagram of the connection structure of the bottom end of the fixing plate of the present invention;

[0027] Figure 5It is a schematic diagram of the structure inside the placement tube of the present invention;

[0028] Figure 6 It is a schematic diagram of the connection structure of the long rod of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the bottom end of the movable plate of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the bottom end of the cover plate of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the bottom end of the protective shell of the present invention;

[0032] Fig.10 It is a flow chart of the present invention.

[0033] In the figure: 1, protective shell; 20, first feed inlet; 21, cover plate; 22, servo motor; 23, cylinder; 24, reaction tube; 25, fixed plate; 26, limit ring; 27, fixed ring; 28, ball; 29, placement tube; 30, stirring rod; 31, plug rod; 32, fixed block; 33, slot; 35, support column; 37, connecting piece; 39, partition; 40, fixed column; 41, connecting spring; 42, annular baffle; 43, moving plate; 44, connecting block; 45, block; 46, long rod; 47, connecting column; 48, rotating rod; 49, guide rod; 50, fixed rod; 51, ring; 52, support wheel; 53, second feed inlet. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] See also Figure 1 - Fig.10As shown, a separation system based on efficient catalyst separation in polytetrahydrofuran production includes a protective shell 1, a cover plate 21 is fixedly connected to the top of the protective shell 1, a servo motor 22 and a cylinder 23 are fixedly connected to the cover plate 21, an output shaft of the servo motor 22 is fixedly connected to a rotating rod 48, an insert rod 31 is inserted inside the rotating rod 48, the bottom end of the insert rod 31 is fixedly connected to a connecting block 44, the bottom end of the connecting block 44 is fixedly connected to a long rod 46, a driving mechanism is provided on the long rod 46, and the driving mechanism can move the long rod 46 upward to the maximum When the reaction tube 24 is in the maximum position, the reaction tube 24 is driven to rotate by the rotation of the long rod 46, so as to realize efficient separation of the solid catalyst and the product by centrifugal force. The long rod 46 passes through the bottom end of the placement tube 29 and the top end of the movable plate 43. The movable plate 43 is fixedly connected to the top end of the placement tube 29. The solid catalyst is placed inside the placement tube 29. A pressing mechanism is arranged inside the placement tube 29. The pressing mechanism can press the solid catalyst inside the placement tube 29 to avoid frequent collision between the solid catalyst and the inner wall of the placement tube 29 when the reaction tube 24 rotates.

[0037] Furthermore, the driving mechanism includes a fixing rod 50, the top of which is fixedly connected to the cylinder 23, the fixing rod 50 is L-shaped, the bottom of which is fitted with the top of the fixing plate 25, the bottom of which is fixedly connected to the ring 51, the ring 51 is rotatably connected to the connecting block 44, and two groups of card blocks 45 are fixedly connected near the middle of the long rod 46, the card blocks 45 are located directly below the fixing block 32, the fixing block 32 is fixedly connected to the bottom of the fixing plate 25, and the fixing block 32 is provided with a card slot 33 inside. 3. The bottom end of the long rod 46 is inserted into the inside of the stirring rod 30. The bottom end of the stirring rod 30 is fixedly connected with a connecting piece 37. The cross section of the connecting piece 37 is T-shaped. The connecting piece 37 passes through the bottom end of the protective shell 1 and the reaction cylinder 24. The reaction cylinder 24 is fixedly connected with a fixing ring 27. The top and bottom ends of the fixing ring 27 are both provided with a limiting ring 26. The limiting ring 26 is fixedly connected to the inner wall of the protective shell 1. The bottom end of the reaction cylinder 24 contacts with three sets of supporting wheels 52. The supporting wheels 52 are fixedly connected to the inner wall of the protective shell 1.

[0038] Through the structural design of the driving mechanism, the long rod 46 can normally drive the stirring rod 30 to rotate, accelerate the reaction of the raw materials in the reaction tube 24, and after the long rod 46 moves upward and separates from the stirring rod 30, the long rod 46 can drive the reaction tube 24 to rotate, so that the solid catalyst remaining in the product is separated from the product by centrifugal force, and then the solid catalyst is efficiently separated to facilitate subsequent further purification and reduce the time for separating the solid catalyst from the product. When working, the servo motor 22 is started, and the output shaft of the servo motor 22 is connected to the rotating rod 48. When the rotating rod 48 rotates, it will drive the plug inserted inside it The rod 31 rotates, and a connecting block 44 is fixed at the bottom end of the plug rod 31. The connecting block 44 is connected to the ring 51 through rotation, ensuring that the plug rod 31 rotates normally while the fixed rod 50 can smoothly drive the plug rod 31 to move upward, thereby driving the long rod 46 to move upward. The bottom end of the long rod 46 is inserted into the stirring rod 30 and drives the stirring rod 30 to rotate when rotating, thereby stirring the raw materials inside the reaction tube 24 to speed up the reaction. After the reaction is completed, the servo motor 22 stops rotating. If the cylinder 23 is started, the fixed rod 50 drives the plug rod 31 to move upward through the ring 51, and the long rod 46 will also move upward synchronously When the long rod 46 moves upward, the bottom end of the long rod 46 will be pulled out from the inside of the stirring rod 30. A block 45 is fixed on the long rod 46. When the long rod 46 moves upward to the maximum position, the block 45 will be inserted into the slot 33 provided on the fixing block 32. The slot 33 can ensure that the long rod 46 passes normally. The fixing block 32 is fixed to the bottom end of the fixing plate 25. At this time, the servo motor 22 is started again. The rotation of the long rod 46 can be transmitted to the fixing block 32 through the contact between the block 45 and the inner wall of the slot 33, thereby driving the fixing plate 25 to rotate. The fixing plate 25 is fixed to the top of the reaction tube 24, and the reaction tube 24 will rotate, thereby The catalyst and the product are separated. When the reaction barrel 24 rotates, the three groups of support wheels 52 can provide support for the bottom end of the reaction barrel 24. The two groups of limit rings 26 can prevent the reaction barrel 24 from rotating to ensure the stable rotation of the reaction barrel 24 inside the protective shell 1. A guide rod 49 is inserted on the fixed rod 50. The guide rod 49 can guide the movement of the fixed rod 50 to reduce the shaking of the fixed rod 50 during the movement, so that the fixed rod 50 can stably lift the inserted rod 31. A connecting piece 37 is fixed to the bottom end of the stirring rod 30 to facilitate the rotation of the stirring rod 30 inside the reaction barrel 24.

[0039] Furthermore, the clamping mechanism includes a movable plate 43, the middle of which is penetrated by a long rod 46, and spiral lines are provided on the movable plate 43 and the long rod 46, the top of the movable plate 43 is fixedly connected with four groups of support columns 35, the top of the support column 35 is fixedly connected with the bottom of the fixed plate 25, the side and bottom of the placement cylinder 29 are provided with multiple groups of mesh holes, the bottom of the movable plate 43 is fixedly connected with an annular baffle 42, the annular baffle 42 is in contact with the inner wall of the placement cylinder 29, and a partition component is provided inside the placement cylinder 29;

[0040] Through the structural design of the clamping mechanism, when the solid catalyst and the product are separated, the movable plate 43 will move downward along the long rod 46 to press and fix the solid catalyst inside the placement tube 29, so as to avoid the solid catalyst inside the placement tube 29 frequently colliding with the inner wall of the placement tube 29 during the rotation of the reaction tube 24, resulting in the generated catalyst powder and smaller particles entering the product through the mesh holes on the placement tube 29. During operation, the solid catalyst is placed in the placement tube 29, and the placement tube 29 is provided with mesh holes to facilitate the normal contact between the raw material and the catalyst. When the long rod 46 moves upward, since the long rod 46 and the movable plate 43 are both provided with spiral lines, the long rod 46 will drive the movable plate 43 to rotate, and the movable plate 43 will move downward while rotating. The annular baffle 42 fixed at the bottom end of the movable plate 43 will block part of the mesh holes on the side of the placement tube 29, so as to separate the solid catalyst inside the placement tube 29 from the outside world. The downward movement of the movable plate 43 can press and fix the solid catalyst inside the placement tube 29.

[0041] Further, the partition assembly includes a partition 39, the top of which is fixedly connected to four groups of fixed columns 40, the inner wall of the fixed column 40 is fixedly connected to a connecting spring 41, the top of the connecting spring 41 is fixedly connected to the bottom of a connecting column 47, the bottom end of the connecting column 47 is inserted into the fixed column 40, the top of the connecting column 47 is fixedly connected to the movable plate 43, a circular hole is opened in the middle of the partition 39, the radius of the circular hole is larger than the radius of the long rod 46, and the radius of the partition 39 is smaller than the radius of the annular baffle 42;

[0042] Through the structural design of the partition assembly, the partition 39 can provide support for the solid catalyst to prevent the solid catalyst from being completely accumulated at the bottom of the placement tube 29, so as to increase the contact area between the solid catalyst and the raw material and accelerate the reaction speed. During operation, the movable plate 43 will drive the partition 39 to move synchronously when it moves downward. The partition 39 can separate the solid catalyst inside the placement tube 29 into two parts, upper and lower parts, so as to increase the contact area between the solid catalyst and the raw material. At the same time, the partition 39 moves downward to press and fix the solid catalyst placed on the bottom of the placement tube 29. At this time, when the movable plate 43 continues to move downward, the connecting spring 41 will be squeezed, and the radius of the partition 39 is smaller than that of the annular baffle 42 to ensure that the annular baffle 42 will not abut against the partition 39 when it moves.

[0043] Furthermore, the support column 35 is designed in an L shape, and the bottom end of the support column 35 fits with the top end of the movable plate 43;

[0044] When working, the support column 35 is designed in an L shape, and the bottom end is in contact with the moving plate 43, thereby limiting the maximum distance that the moving plate 43 can move upward.

[0045] Furthermore, a long groove is formed at the bottom end of the connecting member 37, and the long groove is parallel to the stirring rod 30;

[0046] During operation, the long groove at the bottom end of the connecting piece 37 is parallel to the stirring rod 30. By observing the angle of the long groove on the connecting piece 37 and rotating the connecting piece 37, the stirring rod 30 can be aligned with the bottom end of the long rod 46. When the long rod 46 is reset, the bottom end of the long rod 46 can be accurately inserted into the stirring rod 30.

[0047] Furthermore, a second feed port 53 is provided at the top of the fixing plate 25, and the second feed port 53 is located directly below the first feed port 20, and the first feed port 20 is provided on the cover plate 21;

[0048] During operation, the design of the first feed port 20 and the second feed port 53 facilitates the addition of raw materials into the reaction cylinder 24 . When the first feed port 20 and the second feed port 53 are aligned, the cylinder 23 is started to drive the long rod 46 to move upward, and the block 45 can be accurately inserted into the slot 33 .

[0049] Embodiment 2

[0050] See also Figure 3 As shown, comparative example 1 is another embodiment of the present invention, a plurality of groups of balls 28 are rotatably connected inside the fixing ring 27, the top and bottom ends of the balls 28 are both in contact with the limiting ring 26, and the balls 28 are in contact with the inner wall of the protective shell 1;

[0051] During operation, the ball 28 is rotatably connected inside the fixing ring 27. When the sliding connection between the fixing ring 27 and the limiting ring 26 becomes a rotating connection, the stability of the reaction tube 24 during rotation is improved. The ball 28 also contacts the inner wall of the protective shell 1, so that the reaction tube 24 does not shake during rotation.

[0052] A separation method based on efficient separation of catalyst in polytetrahydrofuran production, the method comprising the following steps:

[0053] S1, start the servo motor 22, the long rod 46 drives the stirring rod 30 to rotate, and stirs the raw materials inside the reaction tube 24 to speed up the reaction speed;

[0054] S2. After the reaction is completed, the servo motor 22 stops rotating, and then the cylinder 23 is started to drive the long rod 46 to move upward, and the bottom end of the long rod 46 is separated from the stirring rod 30, and the stirring rod 30 is no longer driven to rotate. When the long rod 46 moves upward to the maximum position, the fixed block 45 on the long rod 46 will be stuck in the slot 33. At this time, the rotation of the long rod 46 can drive the reaction tube 24 to rotate. Then, the servo motor 22 is started again, and the long rod 46 drives the reaction tube 24 to rotate, and the solid catalyst and the product are separated by centrifugal force;

[0055] S3. After separation is completed, the supernatant liquid in the reaction cylinder 24 is extracted through the first feed port 20 and the second feed port 53 for subsequent purification and processing.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A separation system for efficiently separating catalysts in the production of polytetrahydrofuran, comprising a protective shell (1), a top end of which is fixedly connected to a cover plate (21), a servo motor (22) and a cylinder (23) being fixedly connected to the cover plate (21), and characterized in that: The output shaft of the servo motor (22) is fixedly connected to the rotating rod (48), an insertion rod (31) is inserted into the rotating rod (48), the bottom end of the insertion rod (31) is fixedly connected to the connecting block (44), the bottom end of the connecting block (44) is fixedly connected to the long rod (46), and a driving mechanism is provided on the long rod (46). When the long rod (46) moves upward to the maximum position, the driving mechanism can drive the reaction cylinder (24) to rotate by rotating the long rod (46), so as to facilitate the centrifugal force to rotate. To achieve efficient separation of the solid catalyst and the product, the long rod (46) penetrates the bottom end of the placement tube (29) and the top end of the movable plate (43), the movable plate (43) is fixedly connected to the top end of the placement tube (29), the solid catalyst is placed inside the placement tube (29), and a clamping mechanism is provided inside the placement tube (29), the clamping mechanism can clamp the solid catalyst inside the placement tube (29) to avoid frequent collisions between the solid catalyst and the inner wall of the placement tube (29) when the reaction tube (24) rotates.

2. The separation system for efficiently separating catalysts in the production of polytetrahydrofuran according to claim 1, characterized in that: The driving mechanism comprises a fixing rod (50), the top end of which is fixedly connected to the cylinder (23), the fixing rod (50) is L-shaped, a guide rod (49) is inserted into the fixing rod (50), the top end of which is fixedly connected to the bottom end of the cover plate (21), the bottom end of which is in contact with the top end of the fixing plate (25), the bottom end of which is in contact with the top end of the fixing plate (25), the bottom end of which is fixedly connected to the top end of the fixing plate (25), the bottom end of which is fixedly connected to the bottom end of the fixing rod (50), the bottom end of which is fixedly connected to the ring (51), the ring (51) is rotatably connected to the connecting block (44), two groups of clamping blocks (45) are fixedly connected to the middle of the long rod (46), the clamping blocks (45) are located directly below the fixing block (32), and the fixing block (32) is fixedly The fixing block (32) is fixedly connected to the bottom end of the fixing plate (25), a slot (33) is provided inside the fixing block (32), the bottom end of the long rod (46) is inserted into the inside of the stirring rod (30), the bottom end of the stirring rod (30) is fixedly connected to a connecting piece (37), the cross section of the connecting piece (37) is T-shaped, the connecting piece (37) passes through the bottom ends of the protective shell (1) and the reaction cylinder (24), the reaction cylinder (24) is fixedly connected to a fixing ring (27), the top and bottom ends of the fixing ring (27) are both provided with a limiting ring (26), the limiting ring (26) is fixedly connected to the inner wall of the protective shell (1), the bottom end of the reaction cylinder (24) is in contact with three sets of supporting wheels (52), and the supporting wheels (52) are fixedly connected to the inner wall of the protective shell (1).

3. The separation system for efficiently separating catalysts in the production of polytetrahydrofuran according to claim 1, characterized in that: The clamping mechanism comprises a movable plate (43), the middle part of which is penetrated by a long rod (46), and spiral lines are provided on the movable plate (43) and the long rod (46). The top of the movable plate (43) is fixedly connected to four groups of support columns (35), and the top of the support column (35) is fixedly connected to the bottom end of the fixed plate (25). The side and bottom of the placement tube (29) are provided with multiple groups of mesh holes. The bottom end of the movable plate (43) is fixedly connected to an annular baffle (42), and the annular baffle (42) is in contact with the inner wall of the placement tube (29). A partition component is provided inside the placement tube (29).

4. The separation system for efficiently separating catalysts in the production of polytetrahydrofuran according to claim 3, characterized in that: The partition assembly comprises a partition (39), the top end of the partition (39) is fixedly connected to four groups of fixed columns (40), the inner wall of the fixed column (40) is fixedly connected to a connecting spring (41), the top end of the connecting spring (41) is fixedly connected to the bottom end of the connecting column (47), the bottom end portion of the connecting column (47) is inserted into the fixed column (40), the top end of the connecting column (47) is fixedly connected to the movable plate (43), a circular hole is opened in the middle of the partition (39), the radius of the circular hole is larger than the radius of the long rod (46), and the radius of the partition (39) is smaller than the radius of the annular baffle (42).

5. The separation system based on the efficient separation catalyst in the production of polytetrahydrofuran according to claim 3, characterized in that: The support column (35) is designed to be L-shaped, and the bottom end of the support column (35) fits with the top end of the movable plate (43).

6. The separation system based on the efficient separation catalyst in the production of polytetrahydrofuran according to claim 2, characterized in that: The bottom end of the connecting piece (37) is provided with a long groove, which is parallel to the stirring rod (30).

7. The separation system based on the efficient separation catalyst in the production of polytetrahydrofuran according to claim 2, characterized in that: A second feed port (53) is provided at the top of the fixed plate (25), and the second feed port (53) is located directly below the first feed port (20), and the first feed port (20) is provided on the cover plate (21).

8. The separation system based on the efficient separation catalyst in the production of polytetrahydrofuran according to claim 2, characterized in that: The fixing ring (27) is internally rotatably connected with a plurality of groups of balls (28), the top and bottom ends of the balls (28) are both in contact with the limiting ring (26), and the balls (28) are in contact with the inner wall of the protective shell (1).

9. A separation method based on a highly efficient catalyst separation in the production of polytetrahydrofuran, applied to a separation system based on a highly efficient catalyst separation in the production of polytetrahydrofuran according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1, starting the servo motor (22), the long rod (46) drives the stirring rod (30) to rotate, stirring the raw materials inside the reaction tube (24) to accelerate the reaction speed; S2, after the reaction is completed, the servo motor (22) stops rotating, and then the cylinder (23) is started to drive the long rod (46) to move upward, and then the servo motor (22) is started again, and the long rod (46) drives the reaction tube (24) to rotate, and the solid catalyst and the product are separated by centrifugal force; S3. After separation is completed, the supernatant liquid inside the reaction cylinder (24) is extracted through the first feed inlet (20) and the second feed inlet (53) to facilitate subsequent purification and processing.

10. The separation method based on efficient separation of catalyst in polytetrahydrofuran production according to claim 9, characterized in that: Specifically, S2 is as follows: when the long rod (46) moves upward, its bottom end is separated from the stirring rod (30) and no longer drives the stirring rod (30) to rotate; when the long rod (46) moves upward to the maximum position, the block (45) fixed on the long rod (46) is locked into the slot (33), and at this time, the rotation of the long rod (46) can drive the reaction tube (24) to rotate.

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