Rapid crystallization device for clindamycin phosphate

Abstract

The present invention discloses a rapid crystallization device for clindamycin phosphate, specifically relating to the technical field of crystallization devices, including a base, on which a separation and crystallization assembly is arranged. The separation and crystallization assembly includes a crystallization cylinder arranged on the top of the base, and a heating cylinder is sleeved on the top of the crystallization cylinder. In the present invention, the raw materials between the inner lining filter cylinder and the locking block can be separated through the inner lining filter cylinder, while the impurities can remain in the inner lining filter cylinder, which is easy to separate and filter the raw materials, ensuring the crystallization efficiency and effect of the subsequent raw materials. Through heat conduction heating by the second flow splitting cone block, the separated raw materials can be crystallized in the crystallization cylinder in a way that they gather together through the filter core, realizing an increase in the resistance between the raw materials and the extension rod and the filter core during rotation, thereby improving the stirring efficiency and effect of the raw materials during separation, making it easy for impurities to be separated in the inner lining filter cylinder, and ensuring the crystallization effect of the separated raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of crystallization devices, and more specifically, to a rapid crystallization device for clindamycin phosphate. Background Art

[0002] Clindamycin phosphate is an organic compound and also an antibiotic. Crystallization is a common method for separating and purifying solid substances. By controlling crystallization conditions such as temperature, solvent, pH value, etc., a relatively high-purity crystalline product of clindamycin phosphate can be obtained. This high-purity product has better stability and efficacy, meeting the requirements of pharmaceutical production. The crystallization process can change the physical properties of drugs, such as crystal form, particle size, solubility, etc. These property changes may help improve the solubility, bioavailability, and stability of drugs. For example, certain crystal forms of clindamycin phosphate may be more easily soluble, thus increasing the absorption rate and effect of the drug.

[0003] Among them, the patent with publication number CN222218673U discloses a crystallization device, including a mother liquor tank, an oscillating temperature crystallization tube, and a crystallization tank; the oscillating temperature crystallization tube includes a plurality of low-temperature crystallization tubes and a plurality of high-temperature crystal dissolution tubes. The plurality of low-temperature crystallization tubes and the plurality of high-temperature crystal dissolution tubes are alternately connected, and both the head and the tail are low-temperature crystallization tubes. Among them, the mother liquor tank is connected to the first low-temperature crystallization tube in the oscillating temperature crystallization tube, and the crystallization tank is connected to the last low-temperature crystallization tube in the oscillating temperature crystallization tube;

[0004] When this structure is in use, the mother liquor to be crystallized flows from the mother liquor tank through the oscillating temperature crystallization tube with alternately arranged low-temperature crystallization tubes and high-temperature crystal dissolution tubes and finally converges into the crystallization tank. The mother liquor to be crystallized can be continuously cooled and heated in turn by using the above device, and crystalline substances can be quickly obtained by using oscillating temperature crystallization. However, when this structure is in use, it is not easy to filter out impurities, resulting in impurities in the crystals and low forming quality. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a rapid crystallization device for clindamycin phosphate, aiming to solve the problems raised in the above background art.

[0006] The present invention provides the following technical solutions: A rapid crystallization device for clindamycin phosphate, including a base, and a separation and crystallization assembly is arranged on the base;

[0007] The separation and crystallization assembly includes a crystallization cylinder arranged on the top of the base. A heating cylinder is sleeved on the top of the crystallization cylinder. A sealing ring is arranged between the crystallization cylinder and the heating cylinder, and a lining filter cylinder is arranged in the middle of the heating cylinder;

[0008] A first flow dividing cone block is arranged in the middle of the inner lining filter cartridge. A second flow dividing cone block is arranged at the bottom of the first flow dividing cone block. The second flow dividing cone block is installed at the bottom of the inner cavity of the crystallization cylinder through bolts, and the first flow dividing cone block is rotatably connected with the second flow dividing cone block. The vertical cross-sectional shapes of the first flow dividing cone block and the second flow dividing cone block are both conical;

[0009] A support plate is arranged at the top of the inner cavity of the inner lining filter cartridge. A traction plate that can be adjusted up and down is arranged at the bottom of the support plate. A plurality of extension rods with adjustable angles are distributed on the outer side of the traction plate. Filter cores for filtering are arranged at the bottoms of the extension rods. A turntable is fixedly arranged at the bottom of the first flow dividing cone block. A plurality of pressurizing cross rods are distributed on the outer side of the turntable, and the inner lining filter cartridge is installed on the turntable.

[0010] It can be seen that in the above technical solution, raw materials are added into the crystallization cylinder and the heating cylinder, and then the connection cover is buckled back. The first flow dividing cone block is driven to rotate by the driving motor. When the first flow dividing cone block rotates, it drives the locking block and the inner lining filter cartridge to rotate, so that the raw materials between the inner lining filter cartridge and the locking block can be separated through the inner lining filter cartridge, while the impurities can remain in the inner lining filter cartridge. The separated raw materials can be stored at the bottom of the inner cavity of the crystallization cylinder, and at the same time, heat conduction heating is carried out through the second flow dividing cone block, so that the separated raw materials can crystallize in the crystallization cylinder.

[0011] Optionally, in a possible implementation manner, a limit seat is arranged at the top of the support plate. A rotating rod is rotatably connected to the middle of the limit seat. The rotating rod penetrates through the support plate and extends to the middle of the traction plate. The rotating rod is threadedly connected with the traction plate. The top of the extension rod extends to the bottom of the support plate and is hinged to the support plate. A plurality of pin seat are fixedly arranged on the outer side of the traction plate, and pin members are hinged to each pin seat. A plurality of pin members respectively extend to the corresponding extension rods and are hinged to the extension rods. A sealing cover is arranged at the top of the crystallization cylinder. A hinge frame is hinged to the sealing cover. One end of the hinge frame is fixedly provided with a connection cover. A temperature sensor extending into the crystallization cylinder is arranged on one side of the connection cover. The connection cover is clamped with the sealing cover. A handle is rotatably connected to the connection cover. The handle extends to the top end of the rotating rod, and the limit seat and the support plate are both installed on the sealing cover;

[0012] It can be seen that in the above technical solution, by rotating the handle, when the handle rotates, it drives the rotating rod to rotate. When the rotating rod rotates, it will cause the traction plate to displace at the bottom of the support plate. When the traction plate displaces, it will drive the pin member to displace, causing the pin member to pull the extension rod to rotate along the axis points of the connections between the extension rod and the support plate and between the pin member and the extension rod. Subsequently, the extension rods and the filter elements can approach and gather with each other. When the raw materials are separated in the inner lining filter cylinder, it is easy for each filter element to insert into the raw materials, causing resistance when the raw materials rotate, facilitating the stirring of the raw materials during rotation. When the filter elements extend into the raw materials, the impurities in the raw materials can be filtered on the filter elements. By gathering the filter elements together, the resistance between the raw materials and the extension rods and the filter elements during rotation is increased, thereby improving the stirring efficiency and effect during the separation of the raw materials, facilitating the separation of impurities in the inner lining filter cylinder, and ensuring the crystallization effect of the raw materials after separation.

[0013] Optionally, in a possible implementation manner, a locking block is provided at the top of the first diversion cone block. The bottom of the crystallization cylinder is installed with a driving motor through bolts. The output end of the driving motor sequentially penetrates through the crystallization cylinder and the second diversion cone block and extends to the bottom end of the locking block. The output end of the driving motor is rotationally connected to the crystallization cylinder and the second diversion cone block. A number of support legs are distributed on the outer side of the crystallization cylinder, and each support leg is installed on the outer side of the inner lining filter cylinder through bolts. A discharge pipe is provided at the bottom of the crystallization cylinder.

[0014] The technical effects and advantages of the present invention:

[0015] 1. In the present invention, the driving motor drives the first diversion cone block to rotate. When the first diversion cone block rotates, it drives the locking block and the inner lining filter cylinder to rotate, and then the raw materials between the inner lining filter cylinder and the locking block can be separated through the inner lining filter cylinder, while the impurities can remain in the inner lining filter cylinder, facilitating the separation and filtration of the raw materials and ensuring the efficiency and effect of subsequent raw material crystallization;

[0016] 2. In the present invention, the separated raw materials can be stored at the bottom of the inner cavity of the crystallization cylinder and are heated by heat conduction through the second diversion cone block, enabling the separated raw materials to crystallize in the crystallization cylinder. At the same time, through the conical cross-sections of the first diversion cone block and the second diversion cone block, it is convenient for the raw materials to diffuse outward from the first diversion cone block and the second diversion cone block during separation and subsequent crystallization, preventing the raw materials from piling up together;

[0017] 3. When the handle rotates, it drives the rotating rod to rotate. When the rotating rod rotates, the traction plate will displace at the bottom of the support plate. When the traction plate displaces, it will drive the pin member to displace, causing the pin member to pull the extension rod to rotate along the axis points of the connections between the extension rod and the support plate and between the pin member and the extension rod. Subsequently, the extension rods and the filter cores can approach and gather together. When the raw materials are separated in the inner lining filter cylinder, it is easy for each filter core to insert into the raw materials, causing resistance to the rotation of the raw materials and facilitating the stirring of the raw materials during rotation.

[0018] 4. When the filter core extends into the raw materials, the impurities in the raw materials can be filtered on the filter core. By gathering the filter cores together, the resistance between the raw materials and the extension rods and filter cores during rotation is increased, thereby improving the stirring efficiency and effect during the separation of the raw materials. It is easy for the impurities to be separated in the inner lining filter cylinder, ensuring the crystallization effect of the separated raw materials.

[0019] In summary, the overall design is simple and the structure is reasonable. Through the coordinated use of various structures, the raw materials between the inner lining filter cylinder and the locking block can be separated through the inner lining filter cylinder, while the impurities can remain in the inner lining filter cylinder. It is easy to separate and filter the raw materials, ensuring the efficiency and effect of subsequent raw material crystallization. The separated raw materials can be stored at the bottom of the inner cavity of the crystallization cylinder and are heated by heat conduction through the second flow dividing cone block, enabling the separated raw materials to crystallize in the crystallization cylinder. At the same time, through the conical cross-sections of the first flow dividing cone block and the second flow dividing cone block, it is convenient for the raw materials to spread outward from the first flow dividing cone block and the second flow dividing cone block during separation and subsequent crystallization, avoiding the accumulation of raw materials. When the filter core extends into the raw materials, the impurities in the raw materials can be filtered on the filter core. By gathering the filter cores together, the resistance between the raw materials and the extension rods and filter cores during rotation is increased, thereby improving the stirring efficiency and effect during the separation of the raw materials. It is easy for the impurities to be separated in the inner lining filter cylinder, ensuring the crystallization effect of the separated raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings required for use in some embodiments will be briefly introduced below. Obviously, the drawings in the following description are only the drawings of some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams and do not limit the actual dimensions of the products, the actual processes of the methods, the actual timings of the signals, etc. involved in the embodiments of the present disclosure.

[0021] Figure 1 It is the front view of the overall structure of the present invention.

[0022] Figure 2 It is the cross-sectional view of the overall structure of the present invention.

[0023] Figure 3 This is a perspective view of the sealing cover, hinge frame, connection cover and handle of the present invention.

[0024] Figure 4 This is a perspective view of the base, support legs, heating cylinder, inner lining filter cylinder and first diversion cone block of the present invention.

[0025] Figure 5 This is a schematic diagram when the first diversion cone block, crystallization cylinder and heating cylinder of the present invention are installed together.

[0026] Figure 6 This is a perspective view of the pallet, limit seat, rotating rod, traction plate, extension rod and filter element of the present invention.

[0027] Figure 7 This is a perspective view of the pallet, limit seat and rotating rod of the present invention.

[0028] Figure 8 This is a perspective view of the traction plate, pin member, extension rod and filter element of the present invention.

[0029] Figure 9 This is a perspective view of the first diversion cone block, locking block, turntable and pressure boosting cross bar of the present invention.

[0030] Reference numerals are: 1, base; 2, crystallization cylinder; 3, heating cylinder; 4, inner lining filter cylinder; 5, first diversion cone block; 6, second diversion cone block; 7, limit seat; 8, pallet; 9, rotating rod; 10, traction plate; 11, pin member; 12, extension rod; 13, filter element; 14, sealing cover; 15, hinge frame; 16, connection cover; 17, handle; 18, pin seat; 19, turntable; 20, pressure boosting cross bar; 21, locking block; 22, support legs; 23, discharge pipe; 24, drive motor; 25, temperature sensor. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As shown in the attached Figure 1 - Figure 9The rapid crystallization device of clindamycin phosphate shown, through the separation and crystallization component set on the base 1, through the corresponding cooperation of each structure, the raw materials between the inner lining filter cylinder 4 and the locking block 21 can be separated through the inner lining filter cylinder 4, while the impurities can remain in the inner lining filter cylinder 4, which is easy to separate and filter the raw materials, ensuring the subsequent raw material crystallization efficiency and effect. The separated raw materials can be stored at the bottom of the inner cavity of the crystallization cylinder 2, and at the same time, heat conduction heating is carried out through the second flow dividing cone block 6, so that the separated raw materials can crystallize in the crystallization cylinder 2. At the same time, through the conical cross-sections of the first flow dividing cone block 5 and the second flow dividing cone block 6, it is convenient for the raw materials to diffuse outward to the first flow dividing cone block 5 and the second flow dividing cone block 6 during separation and subsequent crystallization, avoiding the accumulation of raw materials. When the filter core 13 extends into the raw materials, the impurities in the raw materials can be filtered on the filter core 13, and by the way of gathering the raw materials together through the filter core 13, the resistance between the raw materials and the extension rod 12 and the filter core 13 during rotation is increased, thereby improving the stirring efficiency and effect during the separation of the original materials, making it easy for the impurities to be separated in the inner lining filter cylinder 4, ensuring the crystallization effect of the separated raw materials, and the specific structure of the component is set as follows;

[0033] The separation and crystallization component includes a crystallization cylinder 2 arranged on the top of the base 1. A heating cylinder 3 is sleeved on the top of the crystallization cylinder 2. A sealing ring is arranged between the crystallization cylinder 2 and the heating cylinder 3, and an inner lining filter cylinder 4 is arranged in the middle of the heating cylinder 3;

[0034] A first flow dividing cone block 5 is arranged in the middle of the inner lining filter cylinder 4. A second flow dividing cone block 6 is arranged at the bottom of the first flow dividing cone block 5. The second flow dividing cone block 6 is installed at the bottom of the inner cavity of the crystallization cylinder 2 through bolts, and the first flow dividing cone block 5 is rotationally connected with the second flow dividing cone block 6. The vertical cross-sectional shapes of the first flow dividing cone block 5 and the second flow dividing cone block 6 are set as cones;

[0035] A support plate 8 is arranged at the top of the inner cavity of the inner lining filter cylinder 4. A traction plate 10 with adjustable up and down is arranged at the bottom of the support plate 8. A number of extension rods 12 with adjustable angles are distributed on the outside of the traction plate 10, and a filter core 13 for filtering is arranged at the bottom of each extension rod 12. A turntable 19 is fixedly arranged at the bottom of the first flow dividing cone block 5. A number of pressurizing cross bars 20 are distributed on the outside of the turntable 19, and the inner lining filter cylinder 4 is installed on the turntable 19.

[0036] A limiting seat 7 is provided at the top of the pallet 8. A rotating rod 9 is rotatably connected to the middle of the limiting seat 7. The rotating rod 9 penetrates through the pallet 8 and extends to the middle of the traction plate 10. The rotating rod 9 is threadedly connected to the traction plate 10. The top of the extension rod 12 extends to the bottom of the pallet 8 and is hinged to the pallet 8. A plurality of pin seats 18 are fixedly provided on the outer side of the traction plate 10, and a pin member 11 is hinged to each pin seat 18. A plurality of pin members 11 respectively extend to the corresponding extension rods 12 and are hinged to the extension rods 12. A sealing cover 14 is provided at the top of the crystallization cylinder 2. A hinge frame 15 is hinged to the sealing cover 14. One end of the hinge frame 15 is fixedly provided with a connecting cover 16. A temperature sensor 25 extending into the crystallization cylinder 2 is provided on one side of the connecting cover 16. The connecting cover 16 is snap-fitted with the sealing cover 14. A handle 17 is rotatably connected to the connecting cover 16. The handle 17 extends to the top end of the rotating rod 9, and both the limiting seat 7 and the pallet 8 are mounted on the sealing cover 14;

[0037] A locking block 21 is provided at the top end of the first diversion cone block 5. The bottom of the crystallization cylinder 2 is installed with a driving motor 24 through bolts. The output end of the driving motor 24 sequentially penetrates through the crystallization cylinder 2 and the second diversion cone block 6 and extends to the bottom end of the locking block 21. The output end of the driving motor 24 is rotatably connected to the crystallization cylinder 2 and the second diversion cone block 6. A plurality of support legs 22 are distributed on the outer side of the crystallization cylinder 2, and each support leg 22 is installed on the outer side of the inner lining filter cylinder 4 through bolts. A discharge pipe 23 is provided at the bottom of the crystallization cylinder 2.

[0038] During use according to the above structure, the staff installs the device at a designated position, opens the connecting cover 16 through the hinge frame 15, adds raw materials into the crystallization cylinder 2 and the heating cylinder 3, then buckles back the connecting cover 16, and drives the first diversion cone block 5 to rotate through the driving motor 24. When the first diversion cone block 5 rotates, it drives the locking block 21 and the inner lining filter cylinder 4 to rotate, so that the raw materials between the inner lining filter cylinder 4 and the locking block 21 can be separated through the inner lining filter cylinder 4, while the impurities can remain in the inner lining filter cylinder 4. The separated raw materials can be stored at the bottom of the inner cavity of the crystallization cylinder 2, and at the same time, heat conduction heating is carried out through the second diversion cone block 6, so that the separated raw materials can crystallize in the crystallization cylinder 2;

[0039] At the same time, during separation and crystallization, by rotating the handle 17, the handle 17 drives the rotating rod 9 to rotate when rotating. When the rotating rod 9 rotates, the traction plate 10 will displace at the bottom of the pallet 8. When the traction plate 10 displaces, it will drive the pin member 11 to displace, so that the pin member 11 pulls the extension rod 12 to rotate along the center points of the connections between the extension rod 12 and the pallet 8 and between the pin member 11 and the extension rod 12, so that each extension rod 12 and the filter element 13 can approach and gather together. When the raw materials are separated in the inner lining filter cylinder 4, each filter element 13 can be inserted into the raw materials, so that the raw materials are blocked when rotating, which is conducive to stirring the raw materials when rotating;

[0040] And when the filter core 13 extends into the raw material, impurities in the raw material can be filtered onto the filter core 13. By the way that the raw material gathers together through the filter core 13, the resistance between the raw material and the extension rod 12 and the filter core 13 during rotation is increased, thereby improving the stirring efficiency and effect during the original separation. It is easy for impurities to be separated into the inner lining filter cylinder 4, ensuring the crystallization effect of the raw material after separation.

[0041] Different from the prior art, the present application discloses a rapid crystallization device for clindamycin phosphate. Through the corresponding cooperation of each structure, the raw material between the inner lining filter cylinder 4 and the locking block 21 can be separated through the inner lining filter cylinder 4, while impurities can remain in the inner lining filter cylinder 4, which is easy to separate and filter the raw material, ensuring the subsequent crystallization efficiency and effect of the raw material. The separated raw material can be stored at the bottom of the inner cavity of the crystallization cylinder 2. At the same time, heat conduction heating is carried out through the second flow dividing cone block 6, so that the separated raw material can crystallize in the crystallization cylinder 2. At the same time, through the conical cross-sections of the first flow dividing cone block 5 and the second flow dividing cone block 6, it is convenient for the raw material to diffuse to the outside of the first flow dividing cone block 5 and the second flow dividing cone block 6 during separation and subsequent crystallization, avoiding the raw material from piling up. When the filter core 13 extends into the raw material, impurities in the raw material can be filtered onto the filter core 13. By the way that the raw material gathers together through the filter core 13, the resistance between the raw material and the extension rod 12 and the filter core 13 during rotation is increased, thereby improving the stirring efficiency and effect during the original separation. It is easy for impurities to be separated into the inner lining filter cylinder 4, ensuring the crystallization effect of the raw material after separation.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rapid crystallization device for clindamycin phosphate, comprising a base (1), characterized in that: A separation crystallization assembly is provided on the base (1). The separation crystallization assembly includes a crystallization cylinder (2) provided on the top of the base (1). A heating cylinder (3) is sleeved on the top of the crystallization cylinder (2). A sealing ring is provided between the crystallization cylinder (2) and the heating cylinder (3), and a lining filter cylinder (4) is provided in the middle of the heating cylinder (3). A first diversion cone block (5) is provided in the middle of the lining filter cylinder (4). A second diversion cone block (6) is provided at the bottom of the first diversion cone block (5). The second diversion cone block (6) is installed at the bottom of the inner cavity of the crystallization cylinder (2) by bolts, and the first diversion cone block (5) is rotatably connected to the second diversion cone block (6). The vertical cross-sectional shapes of the first diversion cone block (5) and the second diversion cone block (6) are set as cones. A support plate (8) is provided at the top of the inner cavity of the lining filter cylinder (4). A traction plate (10) with adjustable up and down is provided at the bottom of the support plate (8). A number of extension rods (12) with adjustable angles are distributed on the outer side of the traction plate (10), and a filter element (13) for filtration is provided at the bottom of each extension rod (12). A turntable (19) is fixedly provided at the bottom of the first diversion cone block (5). A number of pressurizing cross bars (20) are distributed on the outer side of the turntable (19), and the lining filter cylinder (4) is installed on the turntable (19).

2. The rapid crystallization device for clindamycin phosphate according to claim 1, characterized in that: A limit seat (7) is provided at the top of the support plate (8). A rotating rod (9) is rotatably connected in the middle of the limit seat (7). The rotating rod (9) penetrates through the support plate (8) and extends to the middle of the traction plate (10).

3. The rapid crystallization device for clindamycin phosphate according to claim 2, wherein: The rotating rod (9) is threadedly connected to the traction plate (10). The top of the extension rod (12) extends to the bottom of the support plate (8) and is hinged to the support plate (8).

4. The rapid crystallization device for clindamycin phosphate according to claim 1, characterized in that: A number of pin seats (18) are fixedly provided on the outer side of the traction plate (10), and a pin member (11) is hinged on each pin seat (18). A plurality of pin members (11) respectively extend to the corresponding extension rods (12) and are hinged to the extension rods (12).

5. The rapid crystallization device for clindamycin phosphate according to claim 2, wherein: A sealing cover (14) is provided at the top of the crystallization cylinder (2). A hinge frame (15) is hinged on the sealing cover (14). A connection cover (16) is fixedly provided at one end of the hinge frame (15). A temperature sensor (25) extending into the crystallization cylinder (2) is provided on one side of the connection cover (16).

6. The rapid crystallization device for clindamycin phosphate according to claim 5, wherein: The connection cover (16) is snap-connected to the sealing cover (14). A handle (17) is rotatably connected to the connection cover (16). The handle (17) extends to the top end of the rotating rod (9), and the limit seat (7) and the support plate (8) are both installed on the sealing cover (14).

7. The rapid crystallization device for clindamycin phosphate according to claim 1, characterized in that: A locking block (21) is provided at the top end of the first diversion cone block (5). A driving motor (24) is installed at the bottom of the crystallization cylinder (2) by bolts.

8. The rapid crystallization device for clindamycin phosphate according to claim 7, wherein: The output end of the driving motor (24) sequentially penetrates through the crystallization cylinder (2) and the second diversion cone block (6) and extends to the bottom end of the locking block (21). The output end of the driving motor (24) is rotatably connected to the crystallization cylinder (2) and the second diversion cone block (6).

9. The rapid crystallization device for clindamycin phosphate according to claim 1, characterized in that: A plurality of support legs (22) are distributed on the outer side of the crystallization cylinder (2), and each of the support legs (22) is installed on the outer side of the inner lining filter cylinder (4) by bolts. A discharge pipe (23) is arranged at the bottom of the crystallization cylinder (2).

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