Industrial DTB continuous crystallizer
The design of the DTB continuous crystallizer solves the problems of large footprint, wall scaling, and uneven particle size in industrial crystallization equipment, achieving efficient and automated crystallization production and improving product quality.
Patent Information
- Application Number
- CN202423053133.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing industrial crystallization equipment suffers from problems such as large footprint, wall scaling, inaccurate process control, low production efficiency, and uneven product particle size.
The DTB continuous crystallizer, including the DTB crystallizer, cooling unit and control system, is adopted. It uses tubular heat exchangers, plate heat exchangers and control water tank for cooling, and combines pneumatic ball valves, temperature and liquid level indicator transmitters for real-time monitoring and control to achieve continuous automated production.
It achieves the effects of small equipment footprint, high degree of automation, high crystallization efficiency and good product quality, ensuring uniform heat and mass transfer and reducing the formation of fine grain particles.
Smart Images
Figure CN223615412U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of crystallization equipment, specifically relating to an industrial DTB continuous crystallizer. Background Technology
[0002] Crystallization, as a physicochemical process, plays a vital role in various fields, including chemical engineering, pharmaceuticals, food, biotechnology, materials science, and wastewater treatment. It not only purifies and refines substances, producing high-purity products or intermediates, but also allows for the acquisition of products with different crystal forms by controlling crystallization conditions. Each of the various crystal forms of a substance can exhibit unique physical and chemical properties. Particularly in the pharmaceutical industry, different crystal forms of active pharmaceutical ingredients (APIs) can significantly impact key pharmaceutical characteristics such as dissolution rate and bioavailability of solid dosage forms, thereby affecting drug efficacy and safety. Therefore, crystallization technology plays a crucial role in industrial production.
[0003] Industrial crystallization processes often face a series of challenges that not only affect production efficiency but can also negatively impact the quality of the final product. For example, material adhesion to the crystallizer walls leads to raw material waste and increased equipment cleaning difficulty, while scale buildup can cause crystallizer blockage, affecting production continuity. Furthermore, uneven product particle size and excessive fine powder causing agglomeration can also hinder subsequent processing and applications. Meanwhile, traditional crystallization equipment typically occupies a large area, resulting in reduced production space utilization, and its complex operating procedures increase operator training costs and the risk of errors. Addressing these issues necessitates a thorough improvement to existing crystallizers. Therefore, designing and manufacturing a highly efficient industrial DTB continuous crystallizer is of paramount importance. Utility Model Content
[0004] This invention provides an industrial DTB continuous crystallizer to solve problems such as large footprint, wall scaling, inaccurate process control, low production efficiency, and uneven product particle size in industrial crystallization equipment.
[0005] This utility model is achieved through the following technical solution.
[0006] An industrial DTB continuous crystallizer is characterized by comprising a DTB crystallization vessel and a cooling unit.
[0007] A stirrer is located at the center of the top of the DTB crystallizer. A fourth temperature transmitter and a first liquid level transmitter are respectively located on the left and right sides of the stirrer. The other ends of the stirrer, the fourth temperature transmitter, and the first liquid level transmitter extend into the bottom of the DTB crystallizer's inner cavity. The stirrer has a stirring shaft and stirring blades. The stirring blades are connected to the bottom of the DTB crystallizer via a stirring blade support. A guide tube is located outside the stirring shaft and stirring blades. A circulating liquid outlet is located on the left side wall of the DTB crystallizer. The circulating liquid outlet is connected to the first inlet of a tubular heat exchanger via a second circulating liquid pipe. A first drain valve and a circulating pump are sequentially installed on the second circulating liquid pipe. A circulating liquid inlet is located on the right side wall of the DTB crystallizer. The circulating liquid inlet is connected to the material feed pipe and the material feed pipe from the plant area. The circulating liquid inlet is connected to the second outlet of the tubular heat exchanger via a main feed pipe and a first circulating liquid pipe. The main feed pipe is equipped with a third temperature indicator transmitter. The first circulating liquid pipe is sequentially equipped with a first corrugated pipe mixer, a second temperature indicator transmitter, and a second electromagnetic flowmeter. The material feed pipe is sequentially equipped with a first electromagnetic flowmeter, a first temperature indicator transmitter, a feed pump, and a second V-type pneumatic ball valve. The right side wall of the DTB crystallizer is equipped with a backflushing medium inlet, which is connected to the backflushing medium from the plant area via a backflushing medium pipe. The backflushing medium pipe is equipped with a second pneumatic switch ball valve. The lower right side wall of the DTB crystallizer is equipped with a discharge port, which is connected to a centrifuge via a discharge pipe. The discharge pipe is sequentially equipped with a first pneumatic switch ball valve and a first temperature control pump.
[0008] The cooling unit includes a tubular heat exchanger, a control water tank, and a plate heat exchanger. The tubular heat exchanger has a first outlet and a first inlet at its left and right ends, respectively. The first inlet is connected to the circulating liquid outlet via a second circulating liquid pipe, and the first outlet is connected to the circulating liquid inlet and the end of the material feed pipe via the first circulating liquid pipe. The lower left side and upper right side of the tubular heat exchanger sidewall each have a second inlet and a second... The tubular heat exchanger has a second inlet connected to a control water tank via a second inlet pipe. A second temperature control pump and a second drain valve are sequentially mounted on the second inlet pipe. The plate heat exchanger has a first outlet and a first inlet on its upper left and lower left sides, respectively. The plate heat exchanger has a second inlet and a second outlet on its upper right and lower right sides, respectively. The second outlet of the tubular heat exchanger is connected to the second inlet of the plate heat exchanger via a second outlet pipe. The second outlet pipe is equipped with a third pneumatic V-type regulating valve, a first flow meter, and a second flow meter. The second outlet of the tubular heat exchanger is connected to the control water tank via a second outlet pipe, a branch pipe of the second outlet pipe, and a main return pipe. A shut-off valve is installed on the branch pipe of the second outlet pipe. A second corrugated pipe mixer and a seventh temperature indicating transmitter are installed on the main return pipe. The control water tank is equipped with a second liquid level indicating transmitter and a fifth temperature indicating transmitter. The first inlet of the plate heat exchanger is connected to the cooling water from the plant area via a first inlet pipe. The first inlet pipe is equipped with an eighth temperature indicator transmitter; the second outlet of the plate heat exchanger is connected to the control water tank through the second inlet pipe and the main return water pipe, and the second inlet pipe is equipped with a tenth temperature indicator transmitter; the second inlet of the plate heat exchanger is connected to the second outlet of the tubular heat exchanger through the second outlet pipe; the first outlet of the plate heat exchanger is connected to the cooling water return to the plant area through the first outlet pipe, and the first outlet pipe is equipped with a ninth temperature indicator transmitter, a first V-type pneumatic ball valve, and a temperature indicator.
[0009] The DTB continuous crystallizer also includes a control system, which is electrically connected to the agitator, the first pneumatic ball valve, the second pneumatic ball valve, the first temperature indicator transmitter, the second temperature indicator transmitter, the third temperature indicator transmitter, the fourth temperature indicator transmitter, the fifth temperature indicator transmitter, the sixth temperature indicator transmitter, the seventh temperature indicator transmitter, the eighth temperature indicator transmitter, the ninth temperature indicator transmitter, the tenth temperature indicator transmitter, the first liquid level indicator transmitter, the second liquid level indicator transmitter, the first electromagnetic flowmeter, the second electromagnetic flowmeter, the tubular heat exchanger, the plate heat exchanger, the first temperature control pump, the second temperature control pump, the feed pump, the circulating pump, the first pneumatic V-type regulating valve, the second pneumatic V-type regulating valve, the third pneumatic V-type regulating valve, the fourth pneumatic V-type regulating valve, the first drain valve, and the second drain valve.
[0010] Furthermore, the industrial DTB continuous crystallizer is characterized in that the cross-section of the DTB crystallization vessel is circular.
[0011] The beneficial effects achieved by this utility model are as follows: This utility model uses a tubular heat exchanger, a plate heat exchanger, and a control water tank to cool the inside of the DTB crystallizer. The external cooling method allows for sufficient cooling with a very small volume, resulting in low equipment investment costs. It also utilizes a first pneumatic ball valve, a second pneumatic ball valve, a first temperature indicating transmitter, a second temperature indicating transmitter, a third temperature indicating transmitter, a fourth temperature indicating transmitter, a fifth temperature indicating transmitter, a sixth temperature indicating transmitter, a seventh temperature indicating transmitter, an eighth temperature indicating transmitter, a ninth temperature indicating transmitter, and a tenth temperature indicating transmitter. The system includes an indicator transmitter, a first liquid level indicator transmitter, a second liquid level indicator transmitter, a first electromagnetic flowmeter, a second electromagnetic flowmeter, a first temperature control pump, a second temperature control pump, a feed pump, a circulating pump, a first pneumatic V-type regulating valve, a second pneumatic V-type regulating valve, a third pneumatic V-type regulating valve, a fourth pneumatic V-type regulating valve, a first drain valve, and a second drain valve. These components can monitor and control temperature, flow rate, and liquid level in real time. When combined with a control system, continuous automated production can be achieved. During production, the temperature difference between solutions can be controlled to be less than 1°C, reducing the formation of fine crystal particles. The DTB crystallizer can ensure uniform heat and mass transfer, guaranteeing the particle size of the product.
[0012] Compared with existing technologies, this utility model has the advantages of small footprint, high degree of automation, high crystallization efficiency, and good quality of crystallized products. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the present invention.
[0014] In the diagram: 1. DTB crystallizer; 2. Discharge port; 3. First pneumatic ball valve; 4. Discharge pipe; 5. First temperature control pump; 6. Backflushing medium pipe; 7. Second pneumatic ball valve; 8. Backflushing medium inlet; 9. Circulating liquid inlet; 10. Main feed pipe; 11. First level transmitter; 12. Third temperature transmitter; 13. First bellows mixer; 14. Second temperature transmitter; 15. First circulating liquid pipe; 16. Second electromagnetic flowmeter; 17. Sixth temperature transmitter; 18. First flowmeter; 9. Second outlet pipe; 20. Second flow meter; 21. First electromagnetic flow meter; 22. Plate heat exchanger; 23. Ninth temperature indicating transmitter; 24. Feed pipe; 25. First V-type pneumatic ball valve; 26. Temperature indicator; 27. First temperature indicating transmitter; 28. First outlet pipe; 29. First inlet pipe; 30. Eighth temperature indicating transmitter; 31. Material feed pipe; 32. Second V-type pneumatic ball valve; 33. Feed pump; 34. Fifth temperature indicating transmitter; 35. Control water tank; 36. Second drain valve; 37. 38. Second corrugated pipe mixer; 39. Third inlet pipe; 40. Second temperature control pump; 41. Second inlet of tubular heat exchanger; 42. Tubular heat exchanger; 43. First inlet of tubular heat exchanger; 44. Circulating pump; 45. First drain valve; 46. Second circulating liquid pipe; 47. Agitator support; 48. Agitator blades; 49. Agitator shaft; 50. Flow guide tube; 51. Circulating liquid outlet; 52. Agitator; 53. Fourth temperature indicator transmitter; 54. Third pneumatic V-type regulating valve; 55. Second outlet of tubular heat exchanger; 5 6. Shut-off valve; 57. Tenth temperature indicating transmitter; 58. First outlet of tubular heat exchanger; 59. Second inlet pipe; 60. Main return pipe; 61. Seventh temperature indicating transmitter; 62. Second level indicating transmitter; 63. Second outlet of plate heat exchanger; 64. Second inlet of plate heat exchanger; 65. First outlet of plate heat exchanger; 66. First inlet of plate heat exchanger; 67. Cooling water returns to the plant area; 68. Cooling water originates from the plant area; 69. Fourth V-type pneumatic ball valve; 70. Material originates from the plant area; 71. Backflushing medium originates from the plant area; 72. Centrifuge Detailed Implementation
[0015] An industrial DTB continuous crystallizer is characterized by comprising a DTB crystallization vessel and a cooling unit.
[0016] A stirrer 52 is located at the center of the top of the DTB crystallizer 1. A fourth temperature indicator transmitter 53 and a first liquid level indicator transmitter 11 are respectively located on the left and right sides of the stirrer 52. The other ends of the stirrer 52, the fourth temperature indicator transmitter 53, and the first liquid level indicator transmitter 11 extend into the bottom of the inner cavity of the DTB crystallizer 1. The stirrer 52 is equipped with a stirring shaft 49 and a stirring blade 48. The stirring blade 48 is connected to the bottom of the DTB crystallizer through a stirring blade support 47. A guide tube 50 is provided outside the stirring shaft 49 and the stirring blade 48. A circulating liquid outlet 51 is located on the left side wall of the DTB crystallizer 1. The circulating liquid outlet 51 is connected to the first inlet 43 of the tubular heat exchanger through a second circulating liquid pipe 46. A first drain valve 45 and a circulating pump 44 are sequentially installed on the second circulating liquid pipe 46. A circulating liquid inlet 9 is located on the right side wall of the DTB crystallizer 1. The circulating liquid inlet 9 is connected to the material feed pipe 31 through a main feed pipe 10 and a material feed pipe 31. The circulating liquid inlet 9 is connected to the second outlet 58 of the tubular heat exchanger via the main feed pipe 10 and the first circulating liquid pipe 15. The main feed pipe 10 is equipped with a third temperature indicator transmitter 12. The first circulating liquid pipe 15 is equipped with a first corrugated pipe mixer 13, a second temperature indicator transmitter 14, and a second electromagnetic flowmeter 16 in sequence. The material feed pipe 31 is equipped with a first electromagnetic flowmeter 21, a first temperature indicator transmitter 27, a feed pump 33, and a second V-type pneumatic ball valve 32 in sequence. The right side wall of the DTB crystallizer 1 is equipped with a backflushing medium inlet 8. The backflushing medium inlet 8 is connected to the backflushing medium from the plant area 71 via a backflushing medium pipe 5. The backflushing medium pipe 5 is equipped with a second pneumatic switch ball valve 7. The lower right side wall of the DTB crystallizer 2 is equipped with a discharge port 2. The discharge port 2 is connected to the centrifuge 72 via a discharge pipe 4. The discharge pipe 4 is equipped with a first pneumatic switch ball valve 3 and a first temperature control pump 5 in sequence.
[0017] The cooling unit includes a tubular heat exchanger 42, a control water tank 35, and a plate heat exchanger 22. The tubular heat exchanger 42 has a first outlet 58 and a first inlet 43 at its left and right ends, respectively. The first inlet 43 is connected to the circulating liquid outlet 51 via a second circulating liquid pipe 46, and the first outlet 58 is connected to the circulating liquid inlet 9 via a first circulating liquid pipe 15 and a main feed pipe 10. The lower left side and upper right side of the tubular heat exchanger 42 are respectively provided with tubular... The heat exchanger has a second inlet 41 and a tubular heat exchanger second outlet 55. The second inlet of the tubular heat exchanger is connected to the control water tank 35 via a second inlet pipe 39. A second temperature control pump 40 and a second drain valve 36 are sequentially installed on the second inlet pipe 39. The second outlet 55 of the tubular heat exchanger is connected to the second inlet 64 of the plate heat exchanger via a second outlet pipe 19. A third pneumatic V-type regulating valve 54, a first flow meter 18, and a second flow meter 20 are installed on the second outlet pipe 19. The second outlet 55 of the tubular heat exchanger is connected to the second outlet 64 of the plate heat exchanger via a second outlet pipe 19. Water pipe 19, second outlet water branch pipe 38, and main return water pipe 60 are connected to control water tank 35. A shut-off valve 56 is installed on the second outlet water branch pipe 38. A second corrugated pipe mixer 37 and a seventh temperature indicating transmitter 61 are installed on the main return water pipe 60. A second liquid level indicating transmitter 62 and a fifth temperature indicating transmitter 34 are installed on the temperature control water tank 35. The first inlet 66 of the plate heat exchanger is connected to cooling water from the plant area 68 via a first inlet water pipe 29. An eighth temperature indicating transmitter 30 is installed on the first inlet water pipe 29. The second outlet 63 of the plate heat exchanger is connected to the control water tank 35 through the second inlet pipe 59 and the main return pipe 60. The second inlet pipe 59 is equipped with a tenth temperature indicator transmitter 57. The second inlet 64 of the plate heat exchanger is connected to the second outlet 55 of the tubular heat exchanger through the second outlet pipe 19. The first outlet 65 of the plate heat exchanger is connected to the cooling water return area 67 through the first outlet pipe 28. The first outlet pipe 28 is equipped with a ninth temperature indicator transmitter 23, a first V-type pneumatic ball valve 25, and a temperature indicator 26.
[0018] The industrial DTB continuous crystallizer also includes a control system, which is connected to a stirrer 52, a first pneumatic ball valve 3, a second pneumatic ball valve 7, a first temperature transmitter 27, a second temperature transmitter 14, a third temperature transmitter 12, a fourth temperature transmitter 53, a fifth temperature transmitter 34, a sixth temperature transmitter 17, a seventh temperature transmitter 61, an eighth temperature transmitter 30, a ninth temperature transmitter 23, and a tenth temperature transmitter. Electrical connections are made between the indicating transmitter 57, the first liquid level indicating transmitter 11, the second liquid level indicating transmitter 62, the first electromagnetic flowmeter 21, the second electromagnetic flowmeter 16, the tubular heat exchanger 42, the plate heat exchanger 22, the first temperature control pump 5, the second temperature control pump 40, the feed pump 33, the circulating pump 44, the first pneumatic V-type regulating valve 25, the second pneumatic V-type regulating valve 32, the third pneumatic V-type regulating valve 54, the fourth pneumatic V-type regulating valve 69, the first drain valve 45, and the second drain valve 36.
[0019] Taking the production of molten salt-grade sodium nitrate crystal particles as an example, the working process of this utility model is as follows:
[0020] Fill the DTB crystallizer 1 with a 45°C saturated sodium nitrate solution, open the circulating liquid outlet 51 of the DTB crystallizer 1, close the first drain valve 45, start the circulating pump 44, and open the circulating liquid inlet 9. The material inside the DTB crystallizer 1 will begin to circulate under forced conditions.
[0021] Fill the control water tank 35 with water at approximately 40°C. Close the second drain valve 36, turn on the second temperature control pump 40, the third pneumatic V-type regulating valve 54, and the shut-off valve 56. The constant temperature water enters from the second inlet 41 of the tubular heat exchanger. Part of the water flows back into the control water tank 35 from the second outlet 55 of the tubular heat exchanger, and part of the water flows back into the control water tank 35 from the second outlet 55 of the tubular heat exchanger through the plate heat exchanger 22. Observe whether there is a change in the temperature of the material in the DTB crystallizer 1, and adjust the third pneumatic V-type regulating valve 54 according to the temperature of the material.
[0022] Open the fourth V-type pneumatic ball valve 69, and cooling water from the plant area 68 enters the plate heat exchanger 22 to cool it down.
[0023] Open the second V-type pneumatic ball valve 32 on the material feed pipe 31, the feed pump 33, and the circulating liquid inlet 9 on the DTB crystallizer 1, so that the 97°C sodium nitrate aqueous solution fills the DTB crystallizer 1 through the material feed pipe 31 and the main feed pipe 10.
[0024] Open the second V-type pneumatic ball valve 32 and the feed pump 33, and adjust them through the second pneumatic V-type regulating valve 32. Observe the change in feed flow rate. After the feed is adjusted, observe the change in material temperature in the DTB crystallizer 1. Ensure that the temperature change of the material after mixing with the continuously crystallized material through the first outlet 58 of the tubular heat exchanger and the first pipeline of the circulating liquid is ≤1-3℃.
[0025] Open the discharge port 2, the first pneumatic switch ball valve 3, and the first temperature control pump 5 to continuously feed the crystallized material into the centrifuge at the same feed and discharge rate to complete continuous crystallization. The entire crystallization process is controlled by the control system.
[0026] The present invention has been illustrated with the above embodiments to explain its detailed structural features. However, the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the components used in the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.
Claims
1. An industrial DTB continuous crystallizer, characterized in that: Includes DTB crystallization vessel and cooling unit; A stirrer is located at the center of the top of the DTB crystallizer. A fourth temperature transmitter and a first liquid level transmitter are respectively located on the left and right sides of the stirrer. The other ends of the stirrer, the fourth temperature transmitter, and the first liquid level transmitter extend into the bottom of the DTB crystallizer's inner cavity. The stirrer has a stirring shaft and stirring blades. The stirring blades are connected to the bottom of the DTB crystallizer via a stirring blade support. A guide tube is located outside the stirring shaft and stirring blades. A circulating liquid outlet is located on the left side wall of the DTB crystallizer. The circulating liquid outlet is connected to the first inlet of a tubular heat exchanger via a second circulating liquid pipe. A first drain valve and a circulating pump are sequentially installed on the second circulating liquid pipe. A circulating liquid inlet is located on the right side wall of the DTB crystallizer. The circulating liquid inlet is connected to the material feed pipe and the material feed pipe from the plant area. The circulating liquid inlet is connected to the second outlet of the tubular heat exchanger via a main feed pipe and a first circulating liquid pipe. The main feed pipe is equipped with a third temperature indicator transmitter. The first circulating liquid pipe is sequentially equipped with a first corrugated pipe mixer, a second temperature indicator transmitter, and a second electromagnetic flowmeter. The material feed pipe is sequentially equipped with a first electromagnetic flowmeter, a first temperature indicator transmitter, a feed pump, and a second V-type pneumatic ball valve. The right side wall of the DTB crystallizer is equipped with a backflushing medium inlet, which is connected to the backflushing medium from the plant area via a backflushing medium pipe. The backflushing medium pipe is equipped with a second pneumatic switch ball valve. The lower right side wall of the DTB crystallizer is equipped with a discharge port, which is connected to a centrifuge via a discharge pipe. The discharge pipe is sequentially equipped with a first pneumatic switch ball valve and a first temperature control pump. The cooling unit includes a tubular heat exchanger, a control water tank, and a plate heat exchanger. The tubular heat exchanger has a first outlet and a first inlet at its left and right ends, respectively. The first inlet is connected to the circulating liquid outlet via a second circulating liquid pipe, and the first outlet is connected to the circulating liquid inlet and the end of the material feed pipe via the first circulating liquid pipe. The lower left side and upper right side of the tubular heat exchanger sidewall each have a second inlet and a second... The tubular heat exchanger has a second inlet connected to a control water tank via a second inlet pipe. A second temperature control pump and a second drain valve are sequentially mounted on the second inlet pipe. The plate heat exchanger has a first outlet and a first inlet on its upper left and lower left sides, respectively. The plate heat exchanger has a second inlet and a second outlet on its upper right and lower right sides, respectively. The second outlet of the tubular heat exchanger is connected to the second inlet of the plate heat exchanger via a second outlet pipe. The second outlet pipe is equipped with a third pneumatic V-type regulating valve, a first flow meter, and a second flow meter. The second outlet of the tubular heat exchanger is connected to the control water tank via a second outlet pipe, a branch pipe of the second outlet pipe, and a main return pipe. A shut-off valve is installed on the branch pipe of the second outlet pipe. A second corrugated pipe mixer and a seventh temperature indicating transmitter are installed on the main return pipe. The control water tank is equipped with a second liquid level indicating transmitter and a fifth temperature indicating transmitter. The first inlet of the plate heat exchanger is connected to the cooling water from the plant area via a first inlet pipe. The first inlet pipe is equipped with an eighth temperature indicator transmitter; the second outlet of the plate heat exchanger is connected to the control water tank through the second inlet pipe and the main return water pipe, and the second inlet pipe is equipped with a tenth temperature indicator transmitter; the second inlet of the plate heat exchanger is connected to the second outlet of the tubular heat exchanger through the second outlet pipe; the first outlet of the plate heat exchanger is connected to the cooling water return to the plant area through the first outlet pipe, and the first outlet pipe is equipped with a ninth temperature indicator transmitter, a first V-type pneumatic ball valve, and a temperature indicator. The DTB continuous crystallizer also includes a control system, which is electrically connected to the agitator, the first pneumatic ball valve, the second pneumatic ball valve, the first temperature indicator transmitter, the second temperature indicator transmitter, the third temperature indicator transmitter, the fourth temperature indicator transmitter, the fifth temperature indicator transmitter, the sixth temperature indicator transmitter, the seventh temperature indicator transmitter, the eighth temperature indicator transmitter, the ninth temperature indicator transmitter, the tenth temperature indicator transmitter, the first liquid level indicator transmitter, the second liquid level indicator transmitter, the first electromagnetic flowmeter, the second electromagnetic flowmeter, the tubular heat exchanger, the plate heat exchanger, the first temperature control pump, the second temperature control pump, the feed pump, the circulating pump, the first pneumatic V-type regulating valve, the second pneumatic V-type regulating valve, the third pneumatic V-type regulating valve, the fourth pneumatic V-type regulating valve, the first drain valve, and the second drain valve.
2. The industrial DTB continuous crystallizer according to claim 1, characterized in that: The DTB crystallization vessel has a circular cross-section.