A KOH crystallization temperature control device

Abstract

The present invention belongs to the field of KOH technology, and specifically relates to a KOH crystallization temperature control device, including a base, a cooling chamber and a cover, wherein the cooling chamber includes a plurality of annular grooves of uniformly varying diameters, the plurality of annular grooves being surrounded by a connecting port to form a one-way channel, the ends of the one-way channel being connected to a cooling pipe via a sealing connector; a mixing mechanism is installed inside the cooling chamber, the mixing mechanism including a drive motor, a main shaft and a plurality of mixing components, the drive motor being assembled on the side of the base, the drive motor being in transmission connection with the main shaft, the plurality of mixing components being evenly mounted on the outside of the main shaft, the plurality of mixing components being respectively located between two adjacent cooling plates, the lower end of the cooling plate being provided with an opening matching the main shaft. The present invention, through the arrangement of the annular grooves and the connecting port in the cooling chamber, can circulate cooling water in a one-way manner, thereby preventing the cooling water from entering from the upper side and being unable to be discharged from the lower side of the opening, resulting in different heat exchange effects on the upper and lower sides of the cooling plate, thereby reducing the crystallization efficiency of the KOH solution.

Description

Technical Field

[0001] The invention belongs to the technical field of KOH, and particularly relates to a KOH crystallization temperature control device. Background Art

[0002] With the development of domestic market demand and the semiconductor and electronics industries, customers have higher and higher requirements for the quality of potassium hydroxide solutions. Industrial-grade potassium hydroxide can no longer meet the requirements. Industrial-grade potassium hydroxide needs to be purified to improve its quality. Currently, the production of electronic-grade potassium hydroxide generally involves first preparing potassium hydroxide into a potassium hydroxide solution, and then using ion exchange or cooling and freezing crystallization to remove heavy metals and sodium ions. In the cooling and freezing crystallization method, the prepared potassium hydroxide solution is usually passed into a crystallizer for cooling and crystallization. During the process, the cooling water in the crystallizer is used for heat exchange and cooling.

[0003] However, the existing crystallizer has a slow cooling efficiency, the crystallization effect is not ideal, and the KOH solution and the hot water after heat exchange are easily accumulated at the bottom of the cooling plate, resulting in uneven hot and cold on the upper and lower sides of the cooling plate, which in turn affects the crystallization effect. Therefore, there is room for improvement. Summary of the Invention

[0004] The purpose of the present invention is to provide a KOH crystallization temperature control device to solve the problems existing in the background technology.

[0005] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0006] A KOH crystallization temperature control device comprises a base, a cooling bin and a cover, wherein the cooling bin is assembled on the upper end of the base, the cover is sealed on the upper end of the cooling bin, a feed port and a discharge port are respectively provided at the front and rear ends of the upper side of the cooling bin, a cooling mechanism is provided inside the cooling bin, the cooling mechanism comprises a plurality of cooling plates, a plurality of cooling pipes are fixedly installed on both sides of the cooling bin, a cooling groove is provided inside the cooling plate, and the left and right ends of the cooling plate are connected to the cooling pipe via a sealing connector;

[0007] The cooling groove comprises a plurality of annular grooves with uniformly varying diameters, wherein the plurality of annular grooves are connected to form a one-way channel through a connecting opening, and both ends of the one-way channel are connected to the cooling pipe through a sealing connector;

[0008] A mixing mechanism is installed inside the cooling bin, and the mixing mechanism includes a drive motor, a main shaft and several mixing components. The drive motor is assembled on the side of the base, and the drive motor is connected to the main shaft. Several mixing components are evenly installed on the outside of the main shaft. Several mixing components are respectively located between two adjacent cooling plates. The lower end of the cooling plate is provided with an opening that matches the main shaft.

[0009] The mixing assembly includes two semicircular mounting blocks and a locking piece. The two semicircular mounting blocks are detachably fixed to the main shaft through the locking piece. A first semicircular plate is fixedly mounted on one side of the semicircular mounting block. A plurality of first mixing plates are fixedly mounted on the first semicircular plate. A second semicircular plate is rotatably mounted inside the semicircular mounting block. A plurality of second mixing plates are fixedly mounted on the second semicircular plate. A transmission piece is mounted on the second semicircular plate and the main shaft.

[0010] The transmission member includes a semicircular gear ring fixedly connected to the second semicircular plate, the semicircular gear ring is rotatably connected to the semicircular mounting block, a mounting groove is provided inside the semicircular mounting block, a steering gear meshing with the semicircular gear ring is rotatably installed in the mounting groove, and the main shaft is provided with a driving gear groove matching the rotating gear.

[0011] The locking piece includes a bolt rotatably mounted with one of the semicircular mounting blocks, and the semicircular mounting block is slidably connected to a limit cylinder threadedly connected to the bolt up and down inside the semicircular mounting block, and connecting plates are fixedly connected on both sides of the limit cylinder, and push blocks are fixedly mounted on one side of the two connecting plates away from each other, and locking blocks symmetrically mounted inside the semicircular mounting block and slidably connected to the limit cylinder in the vertical direction are provided, and the semicircular mounting block is provided with a sliding groove matching the locking piece, and a spring is installed between the sliding groove and the locking block, and the other semicircular mounting block is provided with an L-shaped lock groove matching the lock block, and the main shaft is provided with a limiting groove matching the limiting cylinder.

[0012] The steering gear is located between the driving tooth groove and the semicircular gear ring.

[0013] The first semicircular plate and the second semicircular plate are respectively provided with a communicating groove.

[0014] Fixed plates are fixedly installed on the front and rear sides of the center of several of the annular grooves, and cleaning parts are slidably installed inside several of the annular grooves. The cleaning parts include scrapers slidably connected to the annular grooves, and scraper rods abutting the side walls of the annular grooves are fixedly installed at the four corners of two of the scrapers. The size of the scrapers is larger than the connecting port, and the scrapers are made of magnetic material. One of the first mixing plates and one of the second mixing plates are magnetically connected to the scrapers.

[0015] The sealing connection includes a rotating tube rotatably mounted on the cooling plate, and both left and right ends of the rotating tube are threadedly connected to connecting tubes connected to the cooling tube. The connecting tube is provided with a liquid inlet connected to the one-way channel, and the lower end of the connecting tube is fixedly mounted with a rectangular block matching the one-way channel.

[0016] Sealing rings are installed on the peripheral side of the connecting pipe and the side close to the cooling pipe. An empty groove for leaking the rotating pipe is opened on the upper side of the cooling plate, and an anti-slip pad is fixedly installed on the leaking part of the rotating pipe.

[0017] The present invention can circulate cooling water in one direction by setting the annular groove and the connecting port in the cooling groove, thereby avoiding the situation that the cooling water cannot be discharged from the lower side of the opening after entering the upper side, resulting in different heat exchange effects on the upper and lower sides of the cooling plate, and reducing the crystallization efficiency of the KOH solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further illustrated by means of the following non-limiting examples.

[0019] Figure 1 This is a schematic structural diagram of a KOH crystallization temperature control device of the present invention;

[0020] Figure 2 This is a schematic diagram of the uncovered structure of a KOH crystallization temperature control device of the present invention;

[0021] Figure 3 This is a partial structural diagram of a KOH crystallization temperature control device of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of a cooling plate of a KOH crystallization temperature control device according to the present invention;

[0023] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 6 This is a schematic diagram of the structure of two semicircular mounting blocks of a KOH crystallization temperature control device of the present invention;

[0025] Figure 7 This is a schematic diagram of the first cross-sectional structure of a mixing mechanism of a KOH crystallization temperature control device of the present invention;

[0026] Figure 8 for Figure 7 Schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 9 This is a schematic diagram of the second cross-sectional structure of a mixing mechanism of a KOH crystallization temperature control device of the present invention;

[0028] Figure 10 for Figure 9 Schematic diagram of the enlarged structure at point C in the middle.

[0029] The main component symbols are described as follows:

[0030] Base 1, cooling chamber 11, cover 12, cooling plate 13, cooling pipe 14, annular groove 15, connecting port 16, path bar 17, drive motor 20, main shaft 21, semicircular mounting block 22, first semicircular plate 23, first mixing plate 24, second semicircular plate 25, second mixing plate 26, semicircular gear ring 27, steering gear 28, driving tooth groove 29, bolt 30, limiting cylinder 31, connecting plate 32, push block 33, locking block 36, spring 34, L-shaped locking groove 35, fixing plate 40, scraper 41, scraper rod 42, rotating tube 43, connecting tube 44, liquid inlet 45, rectangular block 46, sealing ring 47. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0032] Example 1: Figure 1-10 As shown, a KOH crystallization temperature control device of the present invention includes a base 1, a cooling chamber 11 and a cover 12. The cooling chamber 11 is assembled on the upper end of the base 1, and the cover 12 is sealed on the upper end of the cooling chamber 11. A feed port and a discharge port are respectively provided at the front and rear ends of the upper side of the cooling chamber 11. A cooling mechanism is provided inside the cooling chamber, and the cooling mechanism includes a plurality of cooling plates 13. A plurality of cooling pipes 14 are fixedly installed on both sides of the cooling chamber 11. A cooling groove is provided inside the cooling plate 13. The left and right ends of the cooling plate 13 are connected to the cooling pipe 14 through a sealing connector.

[0033] The cooling groove includes a plurality of annular grooves 15 with uniformly varying diameters. The plurality of annular grooves 15 are surrounded by a communication port 16 to form a one-way channel. Both ends of the one-way channel are connected to the cooling pipe 14 through sealing connectors.

[0034] A mixing mechanism is installed inside the cooling bin 11, and the mixing mechanism includes a drive motor 20, a main shaft 21 and several mixing components. The drive motor 20 is assembled on the side of the base 1, and the drive motor 20 is connected to the main shaft 21 for transmission. Several mixing components are evenly installed on the outside of the main shaft 21, and the several mixing components are respectively located between two adjacent cooling plates 13. An opening matching the main shaft 21 is opened at the lower end of the cooling plate 13.

[0035] Several cooling plates 13 and mixing components are staggeredly distributed inside the cooling bin 11, and the cooling pipes 14 on the left and right sides are externally connected to a cooling water output device and a recovery device, which is a prior art; when the KOH solution is crystallized, the KOH solution is first introduced from the feed port of the cooling bin 11, and at the same time, cooling water is continuously introduced into the one-way channels of the several cooling plates 13 through the several cooling pipes 14. Since the annular groove 15 forms a one-way channel through the connecting port, the cooling water enters from the sealing connector on one side of the cooling plate 13, and then flows out of the cooling plate 13. The KOH solution flows out from the sealing connector on the other side of the cooling plate 13. After entering the cooling bin 11 from the feed port, it will pass through the openings on the lower sides of several cooling plates 13 in sequence and flow toward the discharge port. In the process of passing through the openings, several mixing components are driven by the driving motor 20 to rotate. The mixing component rotates slowly to mix and stir the KOH solution in heat exchange. At the same time, the contact time of the KOH solution and the cold cutting plate 13 is extended during the mixing process of the mixing component, so that the KOH solution can exchange heat evenly while improving the heat exchange efficiency and increasing the efficiency of crystallization.

[0036] like Figure 4 As shown, the annular groove 15 is an incomplete annular groove due to the restriction of the opening of the cooling plate 13, so that the annular grooves 15 of the same diameter cannot be connected at the end. At this time, the communication openings 16 staggered on the left and right and the fixedly connected path bars 17 cooperate with each other to form a one-way channel that is connected to the two sealing connectors at the end and end respectively. Then, the cooling water enters the one-way channel from the sealing connector on one side and flows out from the sealing connector on the other side. In this way, the cooling water inside the cooling plate 13 is circulating water and does not accumulate and store inside the cooling plate 13, causing the cooling water to heat up, thereby improving the crystallization efficiency of the cooling plate 13 for the KOH solution;

[0037] At the same time, scale generated by the cooling water over a long period of time can be conveniently carried away through the one-way channel when falling off, thereby avoiding accumulation at the bottom of the cooling plate 13 .

[0038] During installation, the mixing components are first fixedly mounted one by one on the periphery of the main shaft 21 , and then the openings of the cooling plates 13 are inserted into the outside of the main shaft 21 one by one.

[0039] like Figure 6-10 As shown, the mixing assembly includes two semicircular mounting blocks 22 and a locking piece. The two semicircular mounting blocks 22 are detachably fixed to the main shaft 21 through the locking piece. A first semicircular plate 23 is fixedly mounted on one side of the semicircular mounting block 22. A plurality of first mixing plates 24 are fixedly mounted on the first semicircular plate 23. A second semicircular plate 25 is rotatably mounted inside the semicircular mounting block 22. A plurality of second mixing plates 26 are fixedly mounted on the second semicircular plate 25. A transmission piece is installed between the second semicircular plate 25 and the main shaft 21.

[0040] During installation, the semicircular mounting block 22 without the locking part is preferably placed into the interior of the cooling bin 11. Since the bottom of the cooling bin 11 is circular, the first semicircular plate 23 without the locking part, several first mixing plates 24, the second semicircular plate 23 and several second mixing plates 25 can abut against the lower bottom of the cooling bin 11 under the action of gravity, and the propyne abuts against the lower side of the main shaft 21. At this time, another semicircular mounting block 22 is inserted from top to bottom into the cooling bin 11 and abuts against the upper side of the main shaft 21. In this way, the locking part can be connected to detachably fix the mixing component. In this way, when the main shaft 21 rotates, it can stably follow the rotation under the connection of the locking part, avoiding the situation where the main shaft 21 rotates idly due to excessive resistance of the KOH solution.

[0041] The present invention can circulate cooling water in one direction by setting the annular groove and the connecting port in the cooling groove, thereby avoiding the situation that the cooling water cannot be discharged from the lower side of the opening after entering the upper side, resulting in different heat exchange effects on the upper and lower sides of the cooling plate, and reducing the crystallization efficiency of the KOH solution.

[0042] The sealing connection includes a rotating tube 43 rotatably mounted on the cooling plate 13. Both ends of the rotating tube 43 are threadedly connected to connecting tubes 44 connected to the cooling tube 14. The connecting tube 44 is provided with a liquid inlet 45 connected to the one-way channel. The lower end of the connecting tube 44 is fixedly mounted with a rectangular block 46 matching the one-way channel.

[0043] Sealing rings 47 are installed around the connecting pipe 44 and on the side close to the cooling pipe 14. A slot is opened on the upper side of the cooling plate 13 for leaking the rotating pipe 43. An anti-slip pad is fixed to the leaking part of the rotating pipe 43.

[0044] In the initial state, the connecting tube 44 is located inside the rotating tube 43. Then, the cooling plate 13 is inserted into the outside of the main shaft 21 and the anti-slip pad is rotated to drive the rotating tube 43 to rotate. Since the rectangular block 46 is slidingly connected to the head and tail ends of the one-way channel, when the rotating tube 43 rotates, it will drive the connecting tube 44 to move outward, and then the connecting tube 44 will extend into the cooling tube 14. At this time, the sealing ring 47 can abut against the side of the cooling tube 14 and the rotating tube 43 to improve the sealing effect. Similarly, when removing the cooling plate 13, you only need to rotate the rotating tube 43 in the opposite direction, which also makes it convenient to take out the cooling plate 13.

[0045] Example 2:

[0046] Further improvements are made on the basis of Example 1, and the transmission part includes a semicircular gear ring 27 fixedly connected to the second semicircular plate 25, and the semicircular gear ring 27 is rotatably connected to the semicircular mounting block 22. A mounting groove is provided inside the semicircular mounting block 22, and a steering gear 28 meshing with the semicircular gear ring 27 is rotatably installed in the mounting groove, and the main shaft 21 is provided with a driving tooth groove 29 matching the rotating gear 28.

[0047] The locking piece includes a bolt 30 rotatably mounted on one of the semicircular mounting blocks 22, and a limiting cylinder 31 threadedly connected to the bolt 30 is slidably connected to the inside of the semicircular mounting block 22, and connecting plates 32 are fixedly connected on both sides of the limiting cylinder 31. Push blocks 33 are fixedly mounted on one side of the two connecting plates 32 away from each other, and locking blocks 36 symmetrically mounted on the inside of the semicircular mounting block 22 and slidably connected to the limiting cylinder 31 in the vertical direction. The semicircular mounting block 22 is provided with a sliding groove matching the locking piece, and a spring 34 is installed between the sliding groove and the locking block 36. The other semicircular mounting block 22 is provided with an L-shaped locking groove 35 matching the locking block 36, and the main shaft 21 is provided with a limiting groove matching the limiting cylinder 31.

[0048] When installing the mixing assembly, the limiting groove of the main shaft 21 is preferably facing upwards, and then when installing the semicircular mounting block 22, the rotating gear 28 is meshed with the driving tooth groove 29, and when installing the other semicircular mounting block 22, the locking block 36 initially located on the inner side of the sliding groove is inserted downward into the L-shaped locking groove 35. Then, when the locking piece is connected, the existing tool that can connect the bolt 30 is used to drive the bolt 30 to rotate, thereby making the limiting cylinder 31 unable to rotate under the restriction of the connecting plate 32, so that the limiting cylinder 31 will be in the threaded connection. When the locking cam 36 is in the state of being moved downward, the locking cam 36 will move outwards under the driving force of the spring 34 and the locking cam 36 will move downwards, thereby preventing the locking cam 36 from rotating in the state of being moved downwards.

[0049] When the driving motor 20 drives the main shaft 21 to rotate, it will drive the two semicircular mounting blocks 22 to rotate. Since the steering gear 28 is engaged with the driving tooth groove 29, the semicircular mounting block 22 drives the steering gear 28 to rotate around the driving tooth groove 29. In the process, it will drive the rotating gear 28 to rotate, and then drive the semicircular gear ring 27 engaged with it to rotate. Since the two semicircular gear rings 27 are exactly the same and can be avoided and are both located inside the mounting groove, the two semicircular gear rings 27 are equivalent to complete gear rings, and the two steering gears 28 are engaged with them. This will drive the two semicircular gear rings 27 to continue to rotate under the drive of the two steering gears 28, and the speed of the first complete circular plate composed of the first semicircular plate 23 is different, and the KOH solution is mixed by two complete plates with different speeds, thereby improving the mixing efficiency.

[0050] Example 3:

[0051] A further improvement is made based on Example 2, where the steering gear 28 is located between the driving tooth groove 29 and the semicircular gear ring 27 .

[0052] The first semicircular plate 23 and the second semicircular plate 25 are respectively provided with a communicating groove.

[0053] Since the steering gear 28 is located between the driving tooth groove 29 and the semicircular gear ring 27, the rotation direction of the semicircular gear ring 27 is opposite to that of the driving tooth groove 29, that is, the rotation direction of the semicircular pool 27 is opposite to that of the semicircular mounting block 22, that is, the rotation direction of the first semicircular plate 23 and the second semicircular plate 25 is opposite. In this way, the connecting groove can maximize the time of the KOH solution in the mixing assembly with the cooling plate 13. For example, the connecting groove is located on the lower side. This state is a connecting state, which can make the KOH solution on the front side move to the rear side. When the first semicircular plate 23 rotates clockwise, the second semicircular plate 25 will rotate counterclockwise. When the KOH solution enters between the two first mixing plates 24 in the middle of the first semicircular plate 23, it will drive the KOH solution to rotate forward. At this time, the second semicircular plate 25 and the second mixing plate 25 rotate counterclockwise so that the two connecting grooves will not overlap. The KOH solution will not be connected until they are connected at the lower right side of the same position. This can increase the contact time of the KOH solution with the cooling plate 13.

[0054] Example 4:

[0055] Further improvements are made on the basis of Example 3. Fixed plates 40 are fixedly installed on the front and rear sides of the center of several annular grooves 15. Cleaning parts are slidably installed inside several annular grooves 15. The cleaning parts include scrapers 41 that are slidably connected to the annular grooves 15. Scraper rods 42 that abut against the side walls of the annular grooves 15 are fixedly installed at the four corners of the two scrapers 41. The size of the scraper 41 is larger than the connecting port 16. The scraper 41 is made of magnetic material, and one of the first mixing plates 24 and one of the second mixing plates 26 are magnetically connected to the scraper 41.

[0056] The two scrapers 41 are in contact with the front and rear sides of the cooling trough, and the four scraper rods 42 are in contact with the side walls of the annular groove 15. In the initial state, the scraper 41 is located inside the cooling trough near the opening side under the action of its own weight. Since the rotation directions of the first semicircular plate 23 and the second semicircular plate 25 of the mixing assembly are opposite, the first semicircular plate 23 and the second semicircular plate 25 on the front and rear sides of the cooling plate 13 rotate in opposite directions. In this way, when the first semicircular plate 23 rotates, one of the first mixing plates 24 will be magnetically connected to the scraper 41 with the same rotation direction, thereby driving it to move upward until it is aligned with the first mixing plate 24. The fixed plate 40 abuts, and the first mixing plate 24 continues to rotate to release the magnetic connection. Similarly, the second mixing plate 26 of the second semicircular plate 25 drives the scraper 41 on the other side to move upward and contact the magnetic connection. Then the second mixing plate magnetically connected to it will be magnetically connected to the scraper 41 previously magnetically connected to the first mixing plate 24 again, thereby driving the scraper 41 to return to a position close to the opening and wait for the next movement. In this way, the reciprocating motion scrapes off the scale generated inside the annular groove 15, and then carries it out with the flow of the one-way channel;

[0057] Normal cooling water flows between the two scrapers 41 , and the scraper 41 is slidably connected to the annular groove 15 on the side without the communication port 16 in the initial state, so it can be stably placed at the communication port 16 without blocking the communication of the cooling water.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A temperature control device for KOH crystallization, comprising a base, a cooling chamber, and a cover, wherein the cooling chamber is mounted on the upper end of the base, the cover is sealed on the upper end of the cooling chamber, a feed inlet and a discharge inlet are respectively provided at the front and rear ends of the upper side of the cooling chamber, and a cooling mechanism is provided inside the cooling chamber, characterized in that: The cooling mechanism includes a plurality of cooling plates, a plurality of cooling pipes are fixedly installed on both sides of the cooling bin, a cooling groove is opened inside the cooling plate, and the left and right ends of the cooling plate are connected to the cooling pipes through sealing connectors; The cooling groove comprises a plurality of annular grooves with uniformly varying diameters, wherein the plurality of annular grooves are connected to form a one-way channel through a connecting opening, and both ends of the one-way channel are connected to the cooling pipe through a sealing connector; A mixing mechanism is installed inside the cooling bin, and the mixing mechanism includes a drive motor, a main shaft, and a plurality of mixing components. The drive motor is mounted on the side of the base, and the drive motor is connected to the main shaft in a transmission manner. The plurality of mixing components are evenly mounted on the outside of the main shaft, and the plurality of mixing components are respectively located between two adjacent cooling plates. The lower end of the cooling plate is provided with an opening that matches the main shaft. The mixing assembly includes two semicircular mounting blocks and a locking piece, the two semicircular mounting blocks are detachably fixed to the main shaft through the locking piece, a first semicircular plate is fixedly mounted on one side of the semicircular mounting block, a plurality of first mixing plates are fixedly mounted on the first semicircular plate, a second semicircular plate is rotatably mounted inside the semicircular mounting block, a plurality of second mixing plates are fixedly mounted on the second semicircular plate, and a transmission member is mounted on the second semicircular plate and the main shaft; The transmission member includes a semicircular gear ring fixedly connected to the second semicircular plate, the semicircular gear ring is rotatably connected to the semicircular mounting block, a mounting groove is provided inside the semicircular mounting block, a steering gear meshing with the semicircular gear ring is rotatably mounted in the mounting groove, and the main shaft is provided with a driving tooth groove matching the rotating gear; The first semicircular plate and the second semicircular plate are respectively provided with a connecting groove; Fixed plates are fixedly installed on the front and rear sides of the center of several of the annular grooves, and cleaning parts are slidably installed inside several of the annular grooves. The cleaning parts include scrapers slidably connected to the annular grooves, and scraper rods abutting the side walls of the annular grooves are fixedly installed at the four corners of two of the scrapers. The size of the scrapers is larger than the connecting port, and the scrapers are made of magnetic material. One of the first mixing plates and one of the second mixing plates are magnetically connected to the scrapers.

2. The KOH crystallization temperature control device according to claim 1, characterized in that: The locking piece includes a bolt rotatably mounted with one of the semicircular mounting blocks, and the semicircular mounting block is slidably connected to a limit cylinder threadedly connected to the bolt up and down inside the semicircular mounting block, and connecting plates are fixedly connected on both sides of the limit cylinder, and push blocks are fixedly mounted on one side of the two connecting plates away from each other, and locking blocks symmetrically mounted inside the semicircular mounting block and slidably connected to the limit cylinder in the vertical direction are provided, and the semicircular mounting block is provided with a sliding groove matching the locking piece, and a spring is installed between the sliding groove and the locking block, and the other semicircular mounting block is provided with an L-shaped lock groove matching the lock block, and the main shaft is provided with a limiting groove matching the limiting cylinder.

3. The KOH crystallization temperature control device according to claim 1, characterized in that: The steering gear is located between the driving tooth groove and the semicircular gear ring.

4. The KOH crystallization temperature control device according to claim 1, characterized in that: The sealing connection includes a rotating tube rotatably mounted on the cooling plate, and both left and right ends of the rotating tube are threadedly connected to connecting tubes connected to the cooling tube. The connecting tube is provided with a liquid inlet connected to the one-way channel, and the lower end of the connecting tube is fixedly mounted with a rectangular block matching the one-way channel.

5. The KOH crystallization temperature control device according to claim 4, characterized in that: Sealing rings are installed on the peripheral side of the connecting pipe and the side close to the cooling pipe. An empty groove for leaking the rotating pipe is opened on the upper side of the cooling plate, and an anti-slip pad is fixedly installed on the leaking part of the rotating pipe.

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