A crystallization kettle for producing 2-chloro-5-chloromethylthiazole
By installing a constant temperature chamber and heating system outside the crystallization kettle, crystallization on the stirring shaft is prevented, thus solving the problem of crystallization on the stirring shaft and improving production efficiency and equipment stability.
Patent Information
- Application Number
- CN202522105509.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-29
AI Technical Summary
In existing crystallization kettles, crystals easily condense on the stirring shaft during the stirring process, increasing the burden on the stirring structure and requiring regular cleaning.
A constant temperature chamber is set up outside the crystallization vessel, equipped with heating wires and temperature sensors. Hot air is introduced into the stirring shaft through an air pump and a suction pipe to keep the surface temperature of the stirring shaft higher than the crystallization temperature of the material and prevent crystal formation.
It effectively prevents materials from crystallizing on the stirring shaft, reduces cleaning frequency, and improves production efficiency and equipment stability.
Smart Images
Figure CN224672118U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crystallization reactor technology, specifically a crystallization reactor for the production of 2-chloro-5-chloromethylthiazole. Background Technology
[0002] Crystallization kettles are key equipment in chemical production for achieving material crystallization, separation, and purification. Through precise temperature control and stirring, they promote the precipitation of solutes from solutions to form crystals. They are widely used in fine chemicals, pharmaceuticals, and other fields. In the production of 2-chloro-5-chloromethylthiazole, crystallization kettles are adapted to the acidic characteristics of the material, ensuring a stable crystallization process and helping to improve product purity and production efficiency. Currently, existing crystallization kettles require stirring devices to agitate the solvent inside. However, during the stirring process, a large amount of crystals condense on the stirring shaft, requiring regular cleaning of the crystals. Otherwise, it greatly increases the burden on the stirring structure. Therefore, we propose a crystallization kettle for the production of 2-chloro-5-chloromethylthiazole to solve the above problems. Utility Model Content
[0003] To address the above technical problems, this utility model provides a crystallization reactor for the production of 2-chloro-5-chloromethylthiazole.
[0004] To solve the above-mentioned technical problems, the present invention provides a crystallization kettle for the production of 2-chloro-5-chloromethylthiazol, comprising a crystallization kettle, a vacuum valve connected to the top of the crystallization kettle, a support leg fixedly connected to the bottom surface of the crystallization kettle, and an anti-crystallization mechanism provided on the outside of the crystallization kettle;
[0005] The anti-crystallization mechanism includes a constant temperature chamber, which is fixedly connected to the outer surface of the crystallization vessel. A heating wire and a temperature sensor are fixedly connected inside the constant temperature chamber. A support plate is fixedly connected to the top of the constant temperature chamber, and an air pump is fixedly connected to one side of the support plate. The input end of the air pump is fixedly connected to a suction pipe, and the bottom end of the suction pipe is fixedly connected to the upper surface of the constant temperature chamber. The output end of the air pump is fixedly connected to an outlet pipe. Two sealed bearings are rotatably connected to the top and bottom of the crystallization vessel. A stirring shaft is rotatably connected to the inner rings of the two sealed bearings. The stirring shaft is hollow. A circulation pipe is fixedly connected to the bottom surface of the constant temperature chamber. The top of the stirring shaft is rotatably connected to the outlet pipe, and the bottom is rotatably connected to the circulation pipe. A mounting plate is fixedly connected to the top of the crystallization vessel, and a stepper motor is fixedly connected to the mounting plate. A first gear is fixedly connected to the output end of the stepper motor, and a second gear is fixedly connected to the top of the stirring shaft. The first gear meshes with the second gear.
[0006] Furthermore, two locking blocks are embedded in the bottom of the crystallization vessel, and a protective plate is fixedly connected to the bottom of each locking block. Each protective plate is threaded with three bolts, and each bolt is threadedly connected to the crystallization vessel.
[0007] Furthermore, a first fixing plate is fixedly connected to the bottom surface of the crystallization vessel, the circulation pipe passes through the first fixing plate and is fixedly connected thereto, a second fixing plate is fixedly connected to the top of the crystallization vessel, and the gas outlet pipe passes through the second fixing plate and is fixedly connected thereto.
[0008] Furthermore, a feed pipe is fixedly connected to the top of the crystallization vessel, and a threaded cap is threadedly connected to the feed pipe.
[0009] Furthermore, a control box is fixedly connected to one side of the constant temperature chamber, and a controller is fixedly connected inside the control box. The air pump, heating wire, and stepper motor are controlled by the controller. A movable door is hinged to one side of the control box, and a handle is fixedly connected to one side of the movable door.
[0010] This utility model has the following advantages compared with the prior art:
[0011] This invention, by incorporating a heating wire and a temperature sensor, maintains the interior of the constant temperature chamber at a temperature slightly higher than the material's crystallization temperature. Combined with an air pump and extraction pipe, hot air is drawn into the exhaust pipe and ultimately into the stirring shaft, raising its temperature and preventing material crystallization on its surface. The gas entering the stirring shaft then re-enters the constant temperature chamber through a circulation pipe, thus maintaining the surface temperature of the stirring shaft consistently above the material's crystallization temperature. This fundamentally solves the problem of material easily crystallizing on the stirring shaft. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0013] Figure 2 This is a partial structural sectional view.
[0014] Figure 3 This is a schematic diagram of the stirring shaft structure.
[0015] Figure 4 This is a schematic diagram of a sealed bearing structure.
[0016] Figure 5 This is a schematic diagram of the bolt connection for the protective plate.
[0017] In the diagram: 1. Crystallization vessel; 2. Anti-crystallization mechanism; 201. Constant temperature chamber; 202. Temperature sensor; 203. Support plate; 204. Evacuation pipe; 205. Air pump; 206. Exhaust pipe; 207. Circulation pipe; 208. Heating wire; 209. Sealed bearing; 210. Stirring shaft; 3. Threaded cap; 4. Second gear; 5. First gear; 6. Stepper motor; 7. Mounting plate; 8. Second fixing plate; 9. Movable door; 10. Handle; 11. Support leg; 12. Controller; 13. Control box; 14. Feed pipe; 15. Clamping block; 16. Bolt; 17. First fixing plate; 18. Protective plate; 19. Vacuum valve. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings.
[0019] like Figures 1 to 5 The crystallization vessel shown is for the production of 2-chloro-5-chloromethylthiazole, including a crystallization vessel 1. In this embodiment, a jacketed crystallization vessel is used for cooling, which is existing technology and will not be described in detail. The top of the crystallization vessel 1 is connected to a vacuum valve 19, and the bottom is equipped with an inclined plate for easy discharge. The inclined plate divides the bottom into two discharge ports. An anti-crystallization mechanism 2 is provided on the outside of the crystallization vessel 1. The anti-crystallization mechanism 2 includes a constant temperature chamber 201. The outer surface of the constant temperature chamber 201 is fixedly connected to the outer surface of the crystallization vessel 1. A heat insulation layer made of polyurethane foam is provided between the constant temperature chamber 201 and the crystallization vessel 1. The bottom surface of the crystallization vessel 1 is fixedly connected to... The device is equipped with three support legs 11, which provide support for the equipment. Two locking blocks 15 are embedded in the bottom of the crystallizer 1. The contact area between the locking blocks 15 and the crystallizer 1 is sealed. In this embodiment, a sealing gasket is used. Each locking block 15 is fixedly connected to a protective plate 18 at its bottom. Three bolts 16 are threaded onto the protective plate 18. The outer surface of each bolt 16 is threaded onto the inner wall of the crystallizer 1. The presence of the locking blocks 15 and bolts 16 can block the two discharge ports below the crystallizer 1. By removing the bolts 16, the protective plate 18 can be removed, and the crystals can be taken out.
[0020] Several identical heating wires 208 and temperature sensors 202 are fixedly connected to the inner wall of the constant temperature chamber 201. A support plate 203 is fixedly connected to the upper surface of the constant temperature chamber 201. An air pump 205 is fixedly connected to the left side of the support plate 203. The input end of the air pump 205 is fixedly connected to a suction pipe 204. The bottom end of the suction pipe 204 is fixedly connected to the upper surface of the constant temperature chamber 201. The output end of the air pump 205 is fixedly connected to an outlet pipe 206. Two sealed bearings 209 are rotatably connected to the inner wall of the crystallizing vessel 1. The inner rings of the two sealed bearings 209 are rotatably connected to a stirring shaft 210. The bottom surface of the constant temperature chamber 201 is fixedly connected to the circulation pipe 207. The bottom surface of the crystallization vessel 1 is fixedly connected to the first fixing plate 17. The outer surface of the circulation pipe 207 is fixedly connected to the inner wall of the first fixing plate 17. The upper surface of the crystallization vessel 1 is fixedly connected to the second fixing plate 8. The inner wall of the second fixing plate 8 is fixedly connected to the outer surface of the gas outlet pipe 206. By setting the first fixing plate 17 and the second fixing plate 8, the first fixing plate 17 and the second fixing plate 8 can provide fixed positions for the circulation pipe 207 and the gas outlet pipe 206 respectively. When the stirring shaft 210 rotates, both can maintain sufficient stability.
[0021] The stirring shaft 210 is rotatably connected to the air outlet pipe 206 and the circulation pipe 207 via a rotary joint. The outer surface of the crystallizer 1 is fixedly connected to the feed pipe 14. The inner wall of the feed pipe 14 is threadedly connected to the threaded cover 3. By setting the threaded cover 3 and the feed pipe 14, the feed pipe 14 can be closed by the threaded cover 3. When it is necessary to convey materials into the interior of the crystallizer 1, the threaded cover 3 can be opened.
[0022] A mounting plate 7 is fixedly connected to the upper surface of the crystallization vessel 1. A stepper motor 6 is fixedly connected to the front of the mounting plate 7. A first gear 5 is fixedly connected to the output end of the stepper motor 6. A second gear 4 is fixedly connected to the top of the stirring shaft 210. The teeth of the first gear 5 mesh with the teeth of the second gear 4. By setting the first gear 5 and the second gear 4, there is a meshing relationship between the first gear 5 and the second gear 4. Therefore, the power generated by the stepper motor 6 during operation can be transmitted to the second gear 4, which can further drive the stirring shaft 210 to rotate and perform stirring.
[0023] A control box 13 is fixedly connected to the left side of the constant temperature chamber 201. A controller 12 is fixedly connected to the inner wall of the control box 13. A movable door 9 is movably hinged to the left side of the control box 13. A handle 10 is fixedly connected to the left side of the movable door 9. By setting the controller 12, the start and stop of the air pump 205, the heating temperature of the heating wire 208, and the start and stop of the stepper motor 6 can be controlled. By observing the temperature sensor 202, the internal temperature of the constant temperature chamber 201 can be maintained at about 30°C.
[0024] The working process of this embodiment is as follows:
[0025] In use, open the threaded cap 3, and then transport the dissolved 2-chloro-5-chloromethylthiazole raw material solution into the crystallizer 1 through the feed pipe 14. By introducing a coolant into the jacket of the crystallizer 1, the temperature is lowered to 10–25°C, allowing the crystal layer to grow for 1.5–2.5 hours. Then, the crystal layer is allowed to grow again for 2.5–5 hours at a cooling rate of 2–4°C / h. The temperature is maintained for 15–25 minutes to ensure stable crystal form and uniform particle size. During this process, the stepper motor 6 slowly drives the stirring shaft 210 to rotate. During crystallization, the heating wire 208 can be controlled by the controller 12 to maintain a slightly higher temperature inside the constant temperature chamber 201. Within the temperature range of one to two degrees Celsius for material crystallization, the air pump 205 and the exhaust pipe 204 can draw hot air into the interior of the exhaust pipe 206, which then enters the stirring shaft 210. This raises the surface temperature of the stirring shaft 210, preventing the material from crystallizing on its surface. The gas that enters the stirring shaft 210 eventually re-enters the constant temperature chamber 201 through the circulation pipe 207, repeating the cycle. This maintains the surface temperature of the stirring shaft 210, ensuring it remains above the material's crystallization temperature. This fundamentally solves the problem of materials easily crystallizing on the stirring shaft 210.
Claims
1. A crystallization vessel for the production of 2-chloro-5-chloromethylthiazole, comprising a crystallization vessel (1), wherein a vacuum valve (19) is connected to the top of the crystallization vessel (1), and a support leg (11) is fixedly connected to the bottom surface of the crystallization vessel (1), characterized in that: An anti-crystallization mechanism (2) is provided on the outside of the crystallization vessel (1); The anti-crystallization mechanism (2) includes a constant temperature chamber (201), which is located on one side of the crystallization vessel (1). A heating wire (208) and a temperature sensor (202) are fixedly connected inside the constant temperature chamber (201). A support plate (203) is fixedly connected to the top of the constant temperature chamber (201). An air pump (205) is fixedly connected to one side of the support plate (203). The input end of the air pump (205) is fixedly connected to a suction pipe (204). The bottom end of the suction pipe (204) is fixedly connected to the upper surface of the constant temperature chamber (201). The output end of the air pump (205) is fixedly connected to an outlet pipe (206). Two sealed valves are rotatably connected to the top and bottom of the crystallization vessel (1). A sealing bearing (209) is provided. The inner rings of the two sealing bearings (209) are rotatably connected to a stirring shaft (210). The stirring shaft (210) is hollow. A circulation pipe (207) is fixedly connected to the bottom surface of the constant temperature chamber (201). The top of the stirring shaft (210) is rotatably connected to the air outlet pipe (206), and the bottom is rotatably connected to the circulation pipe (207). A mounting plate (7) is fixedly connected to the top of the crystallizing vessel (1). A stepper motor (6) is fixedly connected to the mounting plate (7). A first gear (5) is fixedly connected to the output end of the stepper motor (6). A second gear (4) is fixedly connected to the top of the stirring shaft (210). The first gear (5) meshes with the second gear (4).
2. The crystallization reactor for the production of 2-chloro-5-chloromethylthiazole according to claim 1, characterized in that: The bottom of the crystallization vessel (1) has two locking blocks (15) embedded in it. Each locking block (15) has a protective plate (18) fixedly connected to its bottom. Each protective plate (18) has three bolts (16) threadedly connected to it. Each bolt (16) is threadedly connected to the crystallization vessel (1).
3. The crystallization reactor for the production of 2-chloro-5-chloromethylthiazole according to claim 1, characterized in that: The bottom surface of the crystallization vessel (1) is fixedly connected to a first fixing plate (17), the circulation pipe (207) passes through the first fixing plate (17) and is fixedly connected to it, the top surface of the crystallization vessel (1) is fixedly connected to a second fixing plate (8), and the gas outlet pipe (206) passes through the second fixing plate (8) and is fixedly connected to it.
4. The crystallization reactor for the production of 2-chloro-5-chloromethylthiazole according to claim 1, characterized in that: The top of the crystallizing vessel (1) is fixedly connected to a feed pipe (14), and the feed pipe (14) is threadedly connected to a threaded cap (3).
5. The crystallization reactor for the production of 2-chloro-5-chloromethylthiazole according to claim 1, characterized in that: A control box (13) is fixedly connected to one side of the constant temperature chamber (201), and a controller (12) is fixedly connected inside the control box (13). The air pump (205), heating wire (208), and stepper motor (6) are controlled by the controller (12). A movable door (9) is hinged to one side of the control box (13), and a handle (10) is fixedly connected to one side of the movable door (9).