Extraction and purification device for green synthesis of chloramine

Abstract

The utility model relates to an extraction and purification device for green synthesis of chloramine, which belongs to the technical field of extraction equipment and comprises an extraction tank, a feed pipe, an extraction agent inlet pipe, a stirring shaft, a stirring impeller, a stirring motor, a three-way pipe I, a material receiving tank, a recovery tank, a discharge pipe, a circulating pipe, a circulating pump and a premixing box, a distribution cone disc is fixed to the lower portion in the premixing box, distribution holes are evenly formed in the distribution cone disc, the other end of the circulating pipe is connected to the top of the premixing box, and an outlet of the circulating pipe faces the top of the distribution cone disc. Separating liquid can enter the recycling tank after primary extraction, then the separating liquid is pumped into the extraction tank again through the circulating pipe and the circulating pump for next extraction, automation is achieved, labor intensity is reduced, efficiency is improved, in addition, a mixture and an extracting agent which are fed initially, and the circulating separating liquid and the extracting agent can be distributed and premixed in the premixing box, and the efficiency is improved. Mixing is accelerated and the extraction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to an extraction and purification device for the green synthesis of chloroamines, belonging to the field of extraction equipment technology. Background Technology

[0002] In the green synthesis of chloroamines, extraction and purification are crucial steps. Their purpose is to separate the target product, chloroamine, from the reaction mixture to improve product purity and yield. Currently, traditional extraction and purification equipment suffers from several problems. Firstly, insufficient mixing between the two phases during extraction leads to low extraction efficiency, making it difficult to effectively separate the target product from impurities. Secondly, to improve yield, at least two extractions are typically performed; however, current methods require manual liquid transfer during the second extraction of the impurity liquid, increasing labor intensity and reducing production efficiency. Utility Model Content

[0003] This invention provides an extraction and purification device for the green synthesis of chloroamines, solving the problems existing in the background art.

[0004] This utility model relates to an extraction and purification device for the green synthesis of chloroamines, comprising an extraction tank, an outlet at the bottom of the extraction tank, a feed pipe and an extractant inlet pipe at the top of the extraction tank, a stirring shaft inside the extraction tank, a stirring impeller and a stirring motor fixedly connected to the stirring shaft, a three-way pipe fixedly connected to the outlet of the extraction tank, a receiving tank and a recovery tank fixedly at the lower ends of the three-way pipe, a discharge pipe fixed at the bottom of the receiving tank, a circulation pipe fixed at the bottom of the recovery tank, a circulation pump on the circulation pipe, a premixing tank fixed at the top of the extraction tank, the feed pipe and the extractant inlet pipe connected to the top of the premixing tank, a distribution cone fixed at the lower part of the premixing tank, a distribution cone with evenly distributed distribution holes, and the other end of the circulation pipe connected to the top of the premixing tank with its outlet facing the top of the distribution cone.

[0005] As a preferred option, each blade of the stirring impeller is provided with through holes, which further increases the flow of liquid and enhances the mixing effect.

[0006] As a preferred option, a transparent observation window is provided on the lower outer wall of the extraction tank to facilitate observation of the discharge of the stratified liquid.

[0007] As a preferred embodiment, the extraction tank is fixed with support legs on its outer side wall, and the receiving tank and the recovery tank are fixed with support rings on their upper and lower sides. Support rings are fixed at the top and bottom of the support rings, and fixing plates are fixed on the left and right sides of the lower support ring. The fixing plates on the inner receiving tank and the recovery tank are fixedly connected, and the fixing plates on the outer receiving tank and the recovery tank are fixed to the support legs. The receiving tank and the recovery tank are more firmly fixed, and the overall shape of the receiving tank, the recovery tank and the extraction tank is stronger and more stable.

[0008] As a preferred embodiment, a three-way pipe is fixed in the middle of the top of the premixing tank. The two inlets at the top of the three-way pipe are fixedly connected to the feed pipe and the extractant inlet pipe, respectively. The liquid entering through the feed pipe and the extractant inlet pipe will be initially mixed in the three-way pipe and then distributed premixed in the premixing tank, resulting in higher mixing efficiency and better mixing effect.

[0009] As a preferred embodiment, a nitrogen inlet pipe is fixed on the upper side wall of the extraction tank. The nitrogen inlet pipe can introduce nitrogen into the extraction tank, increase the pressure inside the extraction tank, accelerate the discharge of liquid, and the introduced nitrogen can form a nitrogen seal, which can better protect the chloroamine.

[0010] As a preferred embodiment, the inner wall of the fixing plate is provided with an arc groove that matches the outer wall of the receiving tank and the recycling tank, increasing the welding area between the fixing plate and the receiving tank and the recycling tank, making the fixing more secure. The bottom of the fixing plate is fixed with a support rib plate, the lower part of the outer support rib plate is fixed to the support leg, and the lower part of the inner support rib plate is fixed to the receiving tank and the recycling tank, making the structure more stable.

[0011] As a preferred embodiment, a reinforcing rib is fixed between the upper and lower support rings. The bottom of the outer end of the reinforcing rib is fixed to the top of the fixed plate, making the support structure more stable. Each fixed plate has a positioning blind hole at the top, and the bottom of the reinforcing rib and the lower support ring has a positioning protrusion that matches the positioning blind hole, which can quickly position the reinforcing rib and the fixed plate.

[0012] This utility model has the following beneficial effects:

[0013] The extraction tank is equipped with a stirring impeller, which, driven by the stirring shaft, enables the mixture and extractant to be fully mixed within the extraction tank, improving extraction efficiency. Furthermore, after one extraction, the separated liquid can enter the recovery tank and then be pumped back into the extraction tank through a circulation pipe and circulation pump for the next extraction, making it more automated, reducing labor intensity, and improving efficiency. In addition, the initially added mixture and extractant, as well as the circulating separated liquid and extractant, are premixed in a premixing tank to accelerate mixing and improve extraction efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

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

[0016] Figure 3 for Figure 1 Partial structural diagram Figure 2 ;

[0017] Figure 4 A cross-sectional structural diagram of the positioning protrusion;

[0018] In the diagram: 1. Stirring motor; 2. Extraction tank; 3. Extractant inlet pipe; 4. T-connector two; 5. Feed pipe; 6. Circulation pipe; 7. Premixing tank; 8. Distribution cone; 9. Stirring shaft; 10. Stirring impeller; 11. Support leg; 12. Recovery tank; 13. Circulation pump; 14. Fixing plate; 15. Support ring; 16. Discharge pipe; 17. Nitrogen inlet pipe; 18. Reinforcing rib; 19. Support ring; 20. Supporting rib; 21. Collection tank; 22. T-connector one; 23. Positioning protrusion; 24. Observation window; 25. Through hole. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments.

[0020] Example 1, as Figures 1 to 4 As shown, this utility model is an extraction and purification device for the green synthesis of chloroamines, including an extraction tank 2. The bottom of the extraction tank 2 is provided with a discharge port, and the top of the extraction tank 2 is provided with a feed pipe 5 and an extractant inlet pipe 3. The extraction tank 2 is provided with a stirring shaft 9, and the stirring shaft 9 is fixedly connected to a stirring impeller 10 and a stirring motor 1. The discharge port of the extraction tank 2 is fixedly connected to a three-way pipe 22. The lower two ends of the three-way pipe 22 are respectively fixed to a receiving tank 21 and a recovery tank 12. The bottom of the receiving tank 21 is fixed with a discharge pipe 16, and the bottom of the recovery tank 12 is fixed with a circulation pipe 6. A circulation pump 13 is provided on the circulation pipe 6. The top of the extraction tank 2 is fixed with a premixing tank 7. The top of the premixing tank 7 is connected to the feed pipe 5 and the extractant inlet pipe 3. The lower part of the premixing tank 7 is fixed with a distribution cone 8. The distribution cone 8 is evenly provided with distribution holes. The other end of the circulation pipe 6 is connected to the top of the premixing tank 7 and the outlet faces the top of the distribution cone 8.

[0021] During operation, close the three valves on the three-way pipe 22, start the stirring motor 1, and drive the stirring shaft 9 to rotate. The mixture and extractant enter from the feed pipe 5 and the extractant inlet pipe 3 respectively, and then fall onto the distribution cone plate 8 for distribution and premixing. Then the liquid enters the extraction tank 2 and is stirred by the stirring impeller 10 to ensure that the mixture and extractant are fully mixed for the extraction process. After a period of time, turn off the stirring motor 1 and let it stand for a period of time. After the separation is completed, open the valves on the upper part and the right side of the three-way pipe 22 to let the lower layer of separated liquid enter the recovery tank 12. Then close the valve on the right side of the three-way pipe 22 and open and close the valve on the left side of the three-way pipe 22 to discharge the upper layer of extractant and chloroamine liquid into the receiving tank 21. After discharge, close the three valves on the three-way pipe 22 and start the circulation pump 13. The circulation pump 13 draws the liquid in the recovery tank 12 and then transports it through the circulation pipe 6 to the premixing tank 7 to be distributed and premixed with the extractant inlet pipe 3 into the secondary extractant. Then it enters the extraction tank 2 for secondary extraction.

[0022] In Example 2, based on Example 1, each blade of the stirring impeller 10 is provided with a through hole 25. The three-way pipe 22 is a transparent pipe. When the lower layer liquid is discharged, when it is seen that the upper layer liquid flows into the lower right branch pipe of the three-way pipe 22 at the fork, the valve on the right side of the three-way pipe 22 is closed, and the valve on the left side of the three-way pipe 22 is opened and closed.

[0023] A transparent observation window 24 is provided on the lower outer wall of the extraction tank 2. The height of the upper part of the valve on the left side of the three-way pipe 22 is higher than the height of the upper part of the valve on the right side to prevent the separated liquid from remaining in the upper part of the left branch of the three-way pipe 22 and affecting the purity of the chloroamine.

[0024] The extraction tank 2 has a support leg 11 fixed to its outer wall. The receiving tank 21 and the recovery tank 12 have support rings 19 fixed to their upper and lower outer walls. Support rings 15 are fixed to the top and bottom of the support rings 19. Fixing plates 14 are fixed to the left and right sides of the lower support ring 15. The fixing plates 14 on the inner receiving tank 21 and the recovery tank 12 are fixedly connected, while the fixing plates 14 on the outer receiving tank 21 and the recovery tank 12 are fixed to the support leg 11. When fixing the receiving tank 21 and the recovery tank 12, the support rings 15 are welded to the upper and lower ends of the support rings 19. The support rings 19 are then fitted onto the outside of the receiving tank 21 and the recovery tank 12. Fixing plates 14 are then welded to the bottom of the lower support rings 15 and welded to the outer walls of the receiving tank 21 and the recovery tank 12. Finally, the support rings 19 are welded to the receiving tank 21 and the recovery tank 12, and the outer fixing plates 14 are welded to the support leg 11.

[0025] A three-way pipe 4 is fixed in the middle of the top of the premix box 7. The two inlets at the top of the three-way pipe 4 are respectively fixedly connected to the feed pipe 5 and the extractant inlet pipe 3.

[0026] A nitrogen inlet pipe 17 is fixed on the upper side wall of the extraction tank 2. Nitrogen can be introduced to pressurize and discharge the upper liquid when it is necessary to discharge it. Before extraction, nitrogen can also be introduced into the extraction tank 2 and the upper and left valves of the three-way pipe 22 can be opened to discharge the nitrogen in the extraction tank 2 and the receiving tank 21.

[0027] The inner wall of the fixing plate 14 is provided with an arc groove that mates with the outer walls of the receiving tank 21 and the recycling tank 12. The bottom of the fixing plate 14 is fixed with a support rib 20. The lower part of the outer support rib 20 is fixed to the support leg 11, and the lower part of the inner support rib 20 is fixed to the receiving tank 21 and the recycling tank 12.

[0028] A reinforcing rib plate 18 is fixed between the upper and lower support rings 15. The bottom outer end of the reinforcing rib plate 18 is fixed to the top of the fixing plate 14. Each fixing plate 14 has a positioning blind hole at its top, and the bottom of the reinforcing rib plate 18 and the lower support ring 15 have positioning protrusions 23 that mate with the positioning blind holes. Before the fixing plate 14 is welded to the lower support ring 15, it is first positioned by the positioning protrusions 23 and the positioning blind holes to locate the installation position of the fixing plate 14 and the position of the reinforcing rib plate 18. Then the fixing plate 14 and the reinforcing rib plate 18 are welded.

[0029] 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.

[0030] 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. An extraction and purification apparatus for the green synthesis of chloroamines, comprising an extraction tank (2), wherein the bottom of the extraction tank (2) is provided with an outlet, and the top of the extraction tank (2) is provided with an inlet pipe (5) and an extractant inlet pipe (3), characterized in that: The extraction tank (2) is equipped with a stirring shaft (9), which is fixedly connected to a stirring impeller (10) and a stirring motor (1). The outlet of the extraction tank (2) is fixedly connected to a three-way pipe (22). The two ends of the lower part of the three-way pipe (22) are respectively fixed to a receiving tank (21) and a recovery tank (12). The bottom of the receiving tank (21) is fixed to a discharge pipe (16). The bottom of the recovery tank (12) is fixed to a circulation pipe (6). A circulation pump (13) is provided on the circulation pipe (6). The top of the extraction tank (2) is fixed to a premixing box (7). The top of the premixing box (7) is connected to a feed pipe (5) and an extractant inlet pipe (3). The lower part of the premixing box (7) is fixed to a distribution cone (8). The distribution cone (8) is evenly provided with distribution holes. The other end of the circulation pipe (6) is connected to the top of the premixing box (7) and the outlet faces the top of the distribution cone (8).

2. A device for the extraction and purification of green synthesis of chloroamine according to claim 1 characterized by: Each blade of the stirring impeller (10) is provided with a through hole (25).

3. A device for the extraction and purification of green synthesis of chloroamine according to claim 1 characterized by: A transparent observation window (24) is provided on the lower outer wall of the extraction vessel (2).

4. A device for the extraction and purification of green synthesis of chloroamine according to claim 3, characterized by: The extraction tank (2) has a support leg (11) fixed on its outer wall. The upper and lower sides of the outer walls of the receiving tank (21) and the recovery tank (12) are fixed with support rings (19). The top and bottom of the support rings (19) are fixed with support rings (15). The left and right sides of the lower support ring (15) are fixed with fixing plates (14). The fixing plates (14) on the inner receiving tank (21) and the recovery tank (12) are fixedly connected. The fixing plates (14) on the outer receiving tank (21) and the recovery tank (12) are fixed on the support leg (11).

5. The extraction and purification apparatus for the green synthesis of chloroamines according to claim 1, characterized in that: The top of the premix box (7) is fixed with a three-way pipe (4), and the two inlets at the top of the three-way pipe (4) are respectively fixedly connected to the feed pipe (5) and the extractant inlet pipe (3).

6. The extraction and purification apparatus for the green synthesis of chloroamines according to claim 1, characterized in that: A nitrogen inlet pipe (17) is fixed on the upper side wall of the extraction vessel (2).

7. The extraction and purification apparatus for the green synthesis of chloroamines according to claim 4, characterized in that: The inner wall of the fixing plate (14) is provided with an arc groove that matches the outer wall of the receiving tank (21) and the recycling tank (12). The bottom of the fixing plate (14) is fixed with a support rib plate (20). The lower part of the outer support rib plate (20) is fixed on the support leg (11), and the lower part of the inner support rib plate (20) is fixed on the receiving tank (21) and the recycling tank (12).

8. The extraction and purification apparatus for the green synthesis of chloroamines according to claim 4, characterized in that: A reinforcing rib plate (18) is fixed between the upper and lower support rings (15). The bottom of the outer end of the reinforcing rib plate (18) is fixed to the top of the fixing plate (14). Each fixing plate (14) has a positioning blind hole at its top. The bottom of the reinforcing rib plate (18) and the lower support ring (15) are provided with positioning protrusions (23) that cooperate with the positioning blind holes.

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