Drying device for green synthesis of chloramine

Abstract

The utility model relates to a drying device for green synthesis of chloramine, which belongs to the technical field of drying equipment and comprises a drying tank, a discharge pipe, a heating jacket, a stirring shaft, a stirring motor, a stirrer, a pressure gauge, an exhaust pipe and a temperature sensor. A cooling liquid pipe communicated with the condensing coil is wound on the condensing coil, the other end of the condensing coil is fixedly connected with a liquid collecting tank, the top of the liquid collecting tank is connected with a suction pipe, and the suction pipe is connected with a vacuum pump. Before chloro-amine is dried, nitrogen is firstly introduced to exhaust air for protection, so that reduction of product purity caused by side reaction during drying can be prevented, low-temperature drying is realized by vacuum suction, and energy consumption is reduced; the condensing coil performs cooling treatment and liquid recovery on hot air, water vapor is collected, the service life of the vacuum pump is prevented from being affected by the water vapor, cooling nitrogen is introduced after drying is completed, and product cooling can be accelerated while nitrogen sealing is achieved.

Description

Technical Field

[0001] This utility model relates to a drying device for the green synthesis of chloroamines, belonging to the field of drying equipment technology. Background Technology

[0002] In the green synthesis process of chloroamines, the drying process is crucial. Traditional chloroamine drying equipment has a series of drawbacks and cannot adequately meet the requirements of green synthesis. Some drying equipment uses direct hot air drying, but due to the chemically reactive nature of chloroamines, high-temperature hot air can easily trigger side reactions, leading to a decrease in product purity. Furthermore, it consumes a lot of energy, which is inconsistent with the concept of green environmental protection. Additionally, the chloroamine cannot be agitated during drying, affecting the drying and subsequent cooling rates. Utility Model Content

[0003] This invention provides a drying apparatus for the green synthesis of chloroamines, solving the problems existing in the background art.

[0004] This utility model relates to a drying device for the green synthesis of chloroamines, including a drying tank, a discharge pipe at the bottom of the drying tank, a heating jacket on the outside of the drying tank, a stirring shaft inside the drying tank, a stirring motor and a stirrer connected to the stirring shaft, a pressure gauge and an exhaust pipe at the top of the drying tank, a temperature sensor inside the drying tank, a vacuum pipe connected to the upper part of the drying tank, a nitrogen inlet pipe and a condensing coil connected in parallel to the vacuum pipe, a connected coolant pipe wound around each horizontal section of the condensing coil, a collection tank fixedly connected to the other end of the condensing coil, a suction pipe connected to the top of the collection tank, a vacuum pump connected to the suction pipe, a nitrogen delivery pipe connected to the other end of the nitrogen delivery pipe connected to the drying tank.

[0005] As a preferred embodiment, a cooling box is provided on the outside of the condenser coil. The upper and lower ends of the condenser coil extend out of the cooling box and are respectively connected to a vacuum tube and a liquid collection tank. The upper and lower ends of the coolant pipe also extend out of the cooling box, with the lower end being the coolant inlet. The cooling box can protect the condenser coil and the coolant pipe.

[0006] As a preferred embodiment, the liquid collection tank is fitted with two semi-circular fixing sleeves. The ends of the fixing sleeves are provided with connecting flanges, and fastening bolts are provided on the connecting flanges. A support column is fixed on the outer wall of the fixing sleeve near the cooling box. A fixing plate is fixed to the outer end of the support column. The fixing plate is provided with mounting holes, and fixing screws are provided in the mounting holes. The fixing screws are fixed to the outer wall of the cooling box. Fixing nuts are provided on the fixing screws on both sides of the fixing plate to facilitate the installation and fixing of the liquid collection tank.

[0007] As a preferred embodiment, the bottom of the heating jacket is provided with an annular liquid collection groove, and a drain pipe is fixed at the bottom of the liquid collection groove. The drain pipe is connected to a cold water inlet pipe and a hot water inlet pipe. The upper part of the heating jacket is provided with a water outlet pipe, which can better regulate the temperature of the water in the heating jacket and facilitate the drainage of the water in the heating jacket when not in use.

[0008] As a preferred embodiment, the inner end of the water outlet pipe is provided with a liquid outlet elbow that extends into the top of the inner side of the heating jacket, so that the water level in the heating jacket can reach the top of the heating jacket, thereby better heating the drying tank.

[0009] As a preferred embodiment, a vertical filter tank is provided at one end of the suction pipe connected to the vacuum pump. The lower end of the filter tank is connected to the lower suction pipe through a flange. The filter tank contains a filter cartridge with its opening facing downwards. A pressure cap is provided at the top of the filter tank to connect to the upper suction pipe. The pressure cap is fixed to the filter tank with bolts. This can filter the gas entering the vacuum pump, protect the vacuum pump, and prevent powder materials from being discharged into the air and causing pollution.

[0010] As a preferred embodiment, a pressure rod is fixed to the bottom of the pressure cap, and the bottom of the pressure rod contacts the top of the filter cartridge. A section of corrugated pipe is provided on the suction pipe above the pressure cap to facilitate the disassembly of the filter tank and the removal of the filter cartridge for cleaning. In addition, the corrugated pipe can prevent the vibration of the vacuum pump from being transmitted to the suction pipe, which could cause the pipe to break at the hard connection and generate noise.

[0011] This utility model has the following beneficial effects:

[0012] Before drying chloroamine, nitrogen gas is first introduced to purge air and provide protection, which can prevent side reactions during drying that could lead to a decrease in product purity. Vacuum suction achieves low-temperature drying, reducing energy consumption. Stirring during drying accelerates the drying process and prevents clumping. A condenser coil cools the hot gas and recovers the liquid, collecting water vapor to prevent it from affecting the service life of the vacuum pump. After drying, cooling nitrogen gas is introduced to nitrogen seal the product while accelerating cooling. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 for Figure 1 Partial structural diagram Figure 1 ;

[0015] Figure 3 for Figure 1 Partial structural diagram Figure 2 ;

[0016] In the diagram: 1. Stirring motor; 2. Drying tank; 3. Water outlet pipe; 4. Liquid collection groove; 5. Drain pipe; 6. Cold water inlet pipe; 7. Hot water inlet pipe; 8. Stirring shaft; 9. Nitrogen inlet pipe; 10. Heating jacket; 11. Cooling box; 12. Coolant pipe; 13. Liquid collection tank; 14. Vacuum pump; 15. Filter cartridge; 16. Pressure cap; 17. Filter tank; 18. Corrugated pipe; 19. Suction pipe; 20. Condensation coil; 21. Nitrogen delivery pipe; 22. Vacuum pipe; 23. Pressure rod; 24. Fixing jacket; 25. Fixing plate; 26. Fixing screw. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments.

[0018] Example 1, such as Figures 1 to 3 As shown, this utility model is a drying device for the green synthesis of chloroamines, including a drying tank 2. The bottom of the drying tank 2 is provided with a discharge pipe, and the outside of the drying tank 2 is provided with a heating jacket 10. The drying tank 2 is provided with a stirring shaft 8, which is connected to a stirring motor 1 and a stirrer. The top of the drying tank 2 is provided with a pressure gauge and an exhaust pipe. The drying tank 2 is provided with a temperature sensor. The upper part of the drying tank 2 is connected to a vacuum pipe 22, which is connected in parallel with a nitrogen inlet pipe 9 and a condensing coil 20. Each horizontal section of the condensing coil 20 is wound with a connected coolant pipe 12. The other end of the condensing coil 20 is fixedly connected to a liquid collection tank 13. The top of the liquid collection tank 13 is connected to a suction pipe 19, which is connected to a vacuum pump 14. The suction pipe 19 is also connected to a nitrogen delivery pipe 21, and the other end of the nitrogen delivery pipe 21 is connected to the drying tank 2.

[0019] During operation, close the valves on the vacuum pipe 22 and the suction pipe 19, and open the valves on the exhaust pipe, nitrogen delivery pipe 21, and nitrogen inlet pipe 9 to purge air from the tank. Then close the valves on the exhaust pipe, nitrogen delivery pipe 21, and nitrogen inlet pipe 9. Next, add the chloroamine to be dried into the drying tank 2 through the manhole. Close the manhole, open the valves on the vacuum pipe 22 and the suction pipe 19, and start the vacuum pump 14 to perform a vacuuming operation inside the drying tank 2, so that the pressure inside the tank reaches the set value (e.g., -0.08MPa to -0.1MPa). Start the stirring motor 1, which drives the stirring shaft 8 and the stirrer to stir the chloroamine in the drying tank 2. Meanwhile, the heating jacket 10 heats the drying tank 2. With the help of a temperature sensor, the temperature inside the drying tank 2 is maintained within a suitable drying temperature range (e.g., 40℃-60℃). During drying, the vacuum pump 14 is continuously started, and the water vapor from the vacuum pipe 22 is condensed when it enters the condenser coil 20. The condensate flows into the collection tank 13. After a period of time, drying is completed, the vacuum pump 14 is turned off, and then the valves on the vacuum pipe 22 and the suction pipe 19 are closed. The valves on the nitrogen delivery pipe 21 and the nitrogen inlet pipe 9 are opened. The nitrogen is cooled when it passes through the condenser coil 20 and then enters the drying tank 2 through the nitrogen delivery pipe 21. The nitrogen is slowly filled to atmospheric pressure, and the cold nitrogen will accelerate the cooling of the material. When it is necessary to discharge the material, the valve on the discharge pipe is opened to discharge the material.

[0020] In Example 2, based on Example 1, a cooling box 11 is provided on the outside of the condenser coil 20. The upper and lower ends of the condenser coil 20 extend out of the cooling box 11 and are respectively connected to a vacuum pipe 22 and a liquid collection tank 13. The upper and lower ends of the coolant pipe 12 also extend out of the cooling box 11, with the lower end being the coolant inlet. The top of the cooling box 11 is detachable and fixed with bolts. A maintenance port is provided on the rear side of the cooling box 11, and a maintenance plate is fixed to the outside of the maintenance port with bolts. A nitrogen delivery pipe 21 is connected to a nitrogen source.

[0021] The liquid collecting tank 13 is fitted with two semi-circular fixing sleeves 24. The ends of the fixing sleeves 24 have connecting flanges with fastening bolts. A support column is fixed to the outer wall of the fixing sleeve 24 near the cooling box 11. A fixing plate 25 is fixed to the outer end of the support column. The fixing plate 25 has mounting holes with fixing screws 26 inside. The fixing screws 26 are fixed to the outer wall of the cooling box 11. Fixing nuts are provided on the fixing screws 26 on both sides of the fixing plate 25. A drain pipe is located at the bottom of the liquid collecting tank 13. During installation, the two fixing sleeves 24 are first clamped together to secure the liquid collecting tank 13. Then, the mounting holes of the fixing plate 25 are inserted into the fixing screws 26, but the fixing nuts are not tightened. The liquid collecting tank 13 is then connected to the condenser coil 20 and the suction pipe 19, and finally the fixing nuts are tightened. During drying, before introducing nitrogen again after drying, first open the valve of the drain pipe to drain the liquid, and then introduce nitrogen. A drying cylinder can be installed on the nitrogen delivery pipe 21 as needed. The drying cylinder is equipped with a support net, and belt-type desiccant particles are placed above the support net to better remove moisture from the nitrogen.

[0022] The heating jacket 10 has an annular liquid collection groove 4 at its bottom, and a drain pipe 5 is fixed to the bottom of the liquid collection groove 4. The drain pipe 5 is connected to a cold water inlet pipe 6 and a hot water inlet pipe 7. The heating jacket 10 has an outlet pipe 3 at its upper part. Both the cold water inlet pipe 6 and the hot water inlet pipe 7 are equipped with electric flow valves, which are connected to a PLC controller. The PLC controller is also connected to a temperature sensor. By controlling the opening of the electric flow valves of the cold water inlet pipe 6 and the hot water inlet pipe 7, the heating temperature can be automatically controlled.

[0023] The inner end of the water outlet pipe 3 is provided with a liquid outlet elbow that extends into the top of the inner side of the heating jacket 10.

[0024] The suction pipe 19 is connected to the vacuum pump 14. One end of the suction pipe 19 is equipped with a vertical filter tank 17. The lower end of the filter tank 17 is connected to the suction pipe 19 at the lower end through a flange. The filter tank 17 is equipped with a filter cylinder 15 with the opening facing downward. The filter tank 17 is equipped with a pressure cap 16 connected to the upper suction pipe 19 at the top. The pressure cap 16 is fixed to the filter tank 17 by bolts.

[0025] A pressure rod 23 is fixed to the bottom of the pressure cap 16, and the bottom of the pressure rod 23 contacts the top of the filter cartridge 15. A section of bellows 18 is provided on the suction pipe 19 above the pressure cap 16. When cleaning the filter cartridge 15, remove the bolts on the pressure cap 16, lift the pressure cap 16 upwards, then unscrew the bolts on the connecting flange below the filter tank 17, remove the filter tank 17, and then take out the filter cartridge 15 for cleaning. The bottom outlet of the filter tank 17 has an embedded groove on the outside that mates with the bottom outlet of the filter cartridge 15. A sealing ring is provided at the embedded groove, and a sealing ring is also provided between the pressure cap 16 and the filter tank 17.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0027] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A drying apparatus for the green synthesis of chloroamines, comprising a drying tank (2), wherein the bottom of the drying tank (2) is provided with a discharge pipe, characterized in that: A heating jacket (10) is provided on the outside of the drying tank (2). A stirring shaft (8) is provided inside the drying tank (2). The stirring shaft (8) is connected to a stirring motor (1) and a stirrer. A pressure gauge and an exhaust pipe are provided on the top of the drying tank (2). A temperature sensor is provided inside the drying tank (2). A vacuum pipe (22) is connected to the upper part of the drying tank (2). A nitrogen inlet pipe (9) and a condensing coil (20) are connected in parallel to the vacuum pipe (22). A connected coolant pipe (12) is wound around each horizontal section of the condensing coil (20). A liquid collection tank (13) is fixedly connected to the other end of the condensing coil (20). A suction pipe (19) is connected to the top of the liquid collection tank (13). A vacuum pump (14) is connected to the suction pipe (19). A nitrogen delivery pipe (21) is also connected to the suction pipe (19). The other end of the nitrogen delivery pipe (21) is connected to the drying tank (2).

2. The drying apparatus for the green synthesis of chloroamines according to claim 1, characterized in that: A cooling box (11) is provided on the outside of the condenser coil (20). The upper and lower ends of the condenser coil (20) extend out of the cooling box (11) and are respectively connected to a vacuum pipe (22) and a liquid collection tank (13). The upper and lower ends of the coolant pipe (12) also extend out of the cooling box (11), with the lower end being the coolant inlet.

3. A drying apparatus for the green synthesis of chloroamines according to claim 2, characterized in that: The liquid collection tank (13) is fitted with two semi-circular fixing sleeves (24). The ends of the fixing sleeves (24) are provided with connecting flanges and fastening bolts. A support column is fixed on the outer wall of the fixing sleeve (24) near the cooling box (11). A fixing plate (25) is fixed on the outer end of the support column. The fixing plate (25) is provided with mounting holes and fixing screws (26) are provided in the mounting holes. The fixing screws (26) are fixed on the outer wall of the cooling box (11). Fixing nuts are provided on the fixing screws (26) on both sides of the fixing plate (25).

4. The drying apparatus for the green synthesis of chloroamines according to claim 1, characterized in that: The bottom of the heating jacket (10) is provided with an annular liquid collection groove (4), and a drain pipe (5) is fixed at the bottom of the liquid collection groove (4). The drain pipe (5) is connected to a cold water inlet pipe (6) and a hot water inlet pipe (7). The upper part of the heating jacket (10) is provided with a water outlet pipe (3).

5. A drying apparatus for the green synthesis of chloroamines according to claim 4, characterized in that: The inner end of the water outlet pipe (3) is provided with a liquid outlet elbow that extends into the top of the inner side of the heating jacket (10).

6. A drying apparatus for the green synthesis of chloroamines according to claim 1, characterized in that: The suction pipe (19) is connected to the vacuum pump (14). One end of the suction pipe (14) is equipped with a vertical filter tank (17). The lower end of the filter tank (17) is connected to the suction pipe (19) at the lower end through a flange. The filter tank (17) is equipped with a filter cylinder (15) with the opening facing downward. The filter tank (17) is equipped with a pressure cap (16) connected to the upper suction pipe (19) at the top. The pressure cap (16) is fixed to the filter tank (17) by bolts.

7. A drying apparatus for the green synthesis of chloroamines according to claim 6, characterized in that: A pressure rod (23) is fixed at the bottom of the pressure cap (16). The bottom of the pressure rod (23) contacts the top of the filter cartridge (15). A section of corrugated pipe (18) is provided on the suction pipe (19) above the pressure cap (16).

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