Concentration device

Abstract

The utility model relates to the technical field of chemical production devices, and discloses a concentration device which comprises a concentration kettle body and a heating jacket arranged outside the concentration kettle body, the heating jacket comprises a shell, a heat insulation ring and a vertical driving assembly; a containing cavity is formed between the shell and the concentration kettle body, is of an integrated structure and comprises a tubular part and a chassis part matched with the bottom of the lower tank body; the right side of the bottom of the shell communicates with a water inlet pipe A. A plurality of drainage pipes are arranged on the left side face of the shell from top to bottom at equal intervals. The shape of the heat insulation ring is matched with the cross section of the tubular part; the heat insulation ring is arranged in the tubular part, and the vertical driving assembly drives the heat insulation ring to move up and down in the tubular part. According to the utility model, the heating jacket is provided with a plurality of drain pipes with different heights and a heat insulation ring, and the height of a heat-conducting medium in the heating jacket can be adjusted according to use requirements, so that the area of the heated side wall of the lower tank body is adjusted, heat is saved, and meanwhile, the occurrence of dry burning is also reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of chemical production equipment, and in particular relates to a concentration device. Background Technology

[0002] In chemical and pharmaceutical production, concentration units are commonly used equipment. For example, in the production of bidentate nitrogen-containing ligands 2,2-bipyridine and its derivatives, concentration units can concentrate the reaction solution to remove unwanted solvents, such as organic phases and water, to achieve the concentration required for the next process. For instance, the concentrated reaction solution can be added to other materials for further reaction, or further cooled to crystallize and obtain the product.

[0003] Chinese utility model patent CN219231435U, entitled "A Concentration Kettle," discloses the following: It includes a kettle body, a heating assembly, and a stirring assembly. The kettle body has a concentration chamber for storing the substance to be concentrated. The heating assembly includes a jacket mounted on the outer contour of the kettle body, through which a heating medium flows. The stirring assembly includes a ribbon assembly and a screw assembly rotatably disposed within the concentration chamber. The ribbon assembly and screw assembly are coaxially arranged and rotate in opposite directions, with the ribbon assembly located outside the screw assembly. The ribbon assembly transports the externally heated emulsion to its liquid surface for evaporation. After surface evaporation, the cooled emulsion is then transported back to the bottom of the concentration chamber by the screw assembly, continuously circulating. This improves the convective heat transfer efficiency of the emulsion in the later stages of evaporation, shortens the time it takes for the emulsion to reach its liquid surface, accelerates water evaporation, shortens the concentration time, improves the concentration efficiency and production capacity of the concentration kettle, and ensures that the solid content of the concentrated substance meets the standards.

[0004] The heating assembly used in this concentration vessel includes a jacket, which is installed on the outer contour of the vessel body, and a heating medium can flow through the jacket. The jacket is suitable for reactions where the amount of material inside the vessel remains constant; however, for concentration reactions, the material inside the vessel gradually decreases during the concentration process. While the area of ​​the heated inner wall of the concentration vessel remains constant, the area of ​​the inner wall not covered by material gradually increases. This results in inefficient heat utilization and heat loss. Furthermore, the exposed heated inner wall of the concentration vessel is easily splashed with concentrated material, which then dry-burns on the heated inner wall, forming solid impurities that adhere to the inner wall or mix into the concentrated material.

[0005] Therefore, there is an urgent need for a concentration device to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to overcome the existing technical problems and provide a concentration device.

[0007] To achieve the above objectives, this utility model is implemented according to the following technical solution:

[0008] A concentration device includes a concentration vessel body and a heating jacket disposed outside the concentration vessel body; the concentration vessel body includes an upper cover body and a lower tank body connected by flanges; a stirring paddle is disposed inside the concentration vessel body; a feed pipe and an exhaust pipe are disposed on the upper cover body, and a discharge pipe is connected to the bottom of the lower tank body; the heating jacket includes a shell, a heat insulation ring, and a vertical drive assembly; a receiving cavity is formed between the shell and the concentration vessel body, the receiving cavity being an integral structure including a tubular part and a base part that matches the bottom of the lower tank body;

[0009] A water inlet pipe A is connected to the right side of the bottom of the shell, and multiple drain pipes are arranged at equal intervals from top to bottom on the left side of the shell;

[0010] The shape of the heat insulation ring matches the cross-section of the tubular section; the heat insulation ring is set inside the tubular section, and the vertical drive assembly drives the heat insulation ring to move up and down inside the tubular section.

[0011] This invention features a heating jacket equipped with multiple drain pipes. Drain pipes of varying heights can be selected as the heat exchange medium outlets for the heating jacket, allowing adjustment of the height of the heat exchange medium within the containment cavity. A heat insulation ring can also be used in conjunction with this process. A vertical drive assembly propels the heat insulation ring to the upper part of the corresponding drain pipe, creating a heating cavity below the heat insulation ring to heat the material inside the concentration vessel. Simultaneously, the heat insulation ring provides insulation, preventing excessive heat transfer to the upper containment cavity, further reducing unnecessary heat loss and minimizing heating of the inner wall of the concentration vessel not covered by material, thus reducing the risk of dry burning.

[0012] The heating jacket of this invention can use water as the heat exchange medium.

[0013] Preferably, the heat insulation ring includes a ring body, and sealing rings are fixedly provided on both the inner and outer ring surfaces of the ring body.

[0014] The ring body can be made of materials with good thermal insulation properties, such as polytetrafluoroethylene (PTFE); the sealing ring is made of high-temperature resistant elastic materials, such as fluororubber or silicone rubber. The ring body mainly serves as thermal insulation, while the sealing ring serves as a seal. This design reduces the seepage of the heat exchange medium from the lower part of the insulation ring into the receiving cavity on the insulation ring.

[0015] Preferably, the vertical drive assembly includes a plurality of motors A, a plurality of screws, and a support plate;

[0016] Several screws are arranged at equal intervals and angles around the tubular part. Each screw has a corresponding support plate at its lower end, and the support plate is fixedly installed inside the housing. The upper end of the screw passes through the upper end face of the housing and is connected to motor A. The screw is rotatably connected to the housing, and the lower end of the screw is rotatably connected to the support plate.

[0017] The heat insulation ring is provided with several threaded holes; the position and size of the threaded holes are matched with the screw rod, and the threaded holes are threadedly connected to the screw rod.

[0018] Several motors A synchronously drive the screw to rotate, causing the heat insulation ring to move up and down inside the tubular section.

[0019] The vertical drive assembly facilitates control of the heat insulation ring's up-and-down movement. Synchronous drive of several motors A is existing technology; those skilled in the art can select the control method according to actual operational needs, and will not be described in detail here.

[0020] Preferably, a water inlet pipe B is connected to the left side of the bottom of the shell, and an overflow pipe is provided on the upper part of the right side of the shell.

[0021] The inlet pipe B is designed to facilitate the introduction of cooling water. If the concentrated material requires cooling, cold water can be directly introduced through inlet pipe B for the cooling process. The overflow pipe is mainly used to overflow the heat exchange medium that may accumulate above the insulation ring. If water enters above the insulation ring, it can drive the insulation ring to move upward, and the heat exchange medium can be discharged from the overflow pipe.

[0022] Preferably, the housing is provided with a rectangular notch, and a rectangular flange window is provided outside the notch;

[0023] The ring body is provided with a block that matches the flange window and notch; the block extends into the flange window through the notch; sealing strips are provided on the front end face, left end face and right end face of the block.

[0024] The flange viewing window facilitates observation of the position of the insulation ring, which in turn allows for easy control of the relative position between the insulation ring and the drain pipe.

[0025] The rectangular flange window used here can be any type commonly used in this field.

[0026] The block is designed to match the interior of the flange viewing window, primarily to prevent heat or heat exchange medium from overflowing from the flange viewing window onto the upper side of the insulation ring. The length of the flange viewing window is matched to the vertical movement range of the insulation ring.

[0027] Components not specified in this invention employ conventional methods in the art, such as motor A, motor B, screw, shaft, flange window, etc. Those skilled in the art can select their models and installation methods according to actual usage requirements, and clearly understand how to install and control them; therefore, they will not be described in detail here. Connection methods involved in this invention, such as flange connection, rotary connection, and fixed connection, are all commonly used connection methods in the art and will not be described in detail here.

[0028] This utility model achieves the following beneficial effects:

[0029] This utility model has a simple structure and is easy to operate. The heating jacket of this utility model is equipped with multiple drain pipes of different heights and a heat insulation ring. The height of the heat-conducting medium in the heating jacket can be adjusted according to the needs of use, thereby adjusting the area of ​​the side wall of the lower tank that is heated, saving heat and reducing the occurrence of dry burning. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0031] Figure 2 for Figure 1 Enlarged view at point E in the middle;

[0032] Figure 3 for Figure 1 Cross-sectional view of the heating jacket along line FF;

[0033] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0034] Figure 5 for Figure 4 Sectional view of the heating jacket along line GG

[0035] Figure 6 for Figure 5 A magnified view of point H in the middle.

[0036] In the diagram: 1. Upper cover; 2. Lower tank; 3. Feed pipe; 4. Exhaust pipe; 5. Discharge pipe; 6. Shell; 7. Tubular section; 8. Chassis section; 9. Water inlet pipe A; 10. Drain pipe; 11. Ring body; 12. Sealing ring; 13. Motor A; 14. Screw; 15. Support plate; 16. Threaded hole; 17. Water inlet pipe B; 18. Overflow pipe; 19. Motor B; 20. Shaft; 21. Vertical blade; 22. Bottom blade; 23. Screw conveyor blade; 24. Connecting rod; 25. Notch; 26. Block; 27. Sealing strip; 28. Flange pipe; 29. ​​Transparent sight glass; 30. Flange frame. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0038] Example 1

[0039] like Figures 1 to 3 As shown, a concentration device includes a concentration vessel body and a heating jacket disposed outside the concentration vessel body; the concentration vessel body includes an upper cover 1 and a lower tank 2 connected by a flange; a stirring paddle is disposed inside the concentration vessel body; a feed pipe 3 and an exhaust pipe 4 are disposed on the upper cover, and a discharge pipe 5 is connected to the bottom of the lower tank; the heating jacket includes a shell 6, a heat insulation ring, and a vertical drive assembly; a receiving cavity is formed between the shell and the concentration vessel body, the receiving cavity being an integral structure including a tubular part 7 and a base part 8 that matches the bottom of the lower tank;

[0040] A water inlet pipe A9 is connected to the right side of the bottom of the shell, and six drain pipes 10 are arranged at equal intervals from top to bottom on the left side of the shell.

[0041] The shape of the heat insulation ring matches the cross-section of the tubular section; the heat insulation ring is set inside the tubular section, and the vertical drive assembly drives the heat insulation ring to move up and down inside the tubular section.

[0042] The heat insulation ring includes a ring body 11, and two sealing rings 12 are fixedly provided on both the inner and outer ring surfaces of the ring body.

[0043] The vertical drive assembly includes four motors A13, four screws 14, and four support plates 15;

[0044] Four screws are arranged equidistantly and at equal angles around the tubular part. Each screw has a corresponding support plate at its lower end, which is fixedly installed inside the housing. The upper end of the screw passes through the upper end face of the housing and is connected to motor A. The screw is rotatably connected to the housing, and the lower end of the screw is rotatably connected to the support plate.

[0045] The heat insulation ring has four threaded holes 16 on its ring body; the position and size of the threaded holes are matched with the screw rod, and the threaded holes are threadedly connected to the screw rod.

[0046] Four motors A synchronously drive the screw to rotate, causing the heat insulation ring to move up and down inside the tubular section.

[0047] A water inlet pipe B17 is connected to the left side of the bottom of the shell, and an overflow pipe 18 is provided on the upper part of the right side of the shell.

[0048] The stirring paddle is driven to rotate by motor B19; the stirring paddle includes a rotating shaft 20, vertical blades 21, bottom blades 22, and spiral conveying blades 23; the head of the rotating shaft passes through the upper cover and is connected to motor B, and the rotating shaft is rotatably connected to the upper cover; the vertical blades are fixedly connected to the rotating shaft through connecting rods 24, and the vertical blades are in contact with the inner wall of the lower tank; the bottom blades are fixedly connected to the rotating shaft through connecting rods, and the bottom blades are in contact with the bottom of the lower tank; a spiral blade is also fixedly installed on the rotating shaft.

[0049] In this embodiment, the material to be concentrated enters the lower tank through the feed pipe. After feeding is complete, the concentration process can begin. During concentration, hot water is introduced into the heating jacket to concentrate and evaporate the material. The evaporated product is discharged through the exhaust pipe. A stirring paddle is driven during concentration to accelerate the process. As concentration proceeds, the heat insulation ring can be adjusted. The specific adjustment method is as follows: the original drain pipe remains unchanged, and then, based on the expected water level in the heating jacket, the corresponding drain pipe above it is opened. The heat insulation ring is then driven downwards to the desired height, and then the original drain pipe is closed. After the concentration process is complete, the concentrated material can be discharged as needed; alternatively, cold water can be introduced into the heating jacket through the water inlet pipe B to cool the lower tank before discharging the concentrated material.

[0050] Example 2

[0051] like Figures 4 to 6 As shown, based on Embodiment 1, in this embodiment, a rectangular notch 25 is provided on the shell, and a rectangular flange window is provided outside the notch;

[0052] The ring body is provided with a block 26 that matches the flange window and notch; the block extends into the flange window through the notch; a sealing strip 27 is provided on the front end face, left end face and right end face of the block.

[0053] The flange viewing window includes a rectangular flange tube 28, a rectangular transparent viewing mirror 29, and a rectangular flange frame 30. The inner shape of the flange tube matches the notch. The flange tube is fixedly installed outside the notch. The transparent viewing mirror is sealed and pressed onto the flange tube by the flange frame, and the flange tube and flange frame are connected by a sealing flange. The sealing method for the transparent viewing mirror here can be any commonly used for flange viewing windows, such as using a sealing ring.

[0054] The flange viewing window allows operators to more intuitively determine the position of the insulation ring, thus facilitating the control of the relative position between the insulation ring and the drain pipe.

[0055] The technical solution of this utility model is not limited to the specific embodiments described above. All technical modifications made based on the technical solution of this utility model shall fall within the protection scope of this utility model.

Claims

1. A concentration apparatus, comprising a concentration vessel body and a heating jacket disposed outside the concentration vessel body; the concentration vessel body includes an upper cover body and a lower tank body connected by flanges; a stirring paddle is disposed inside the concentration vessel body; a feed pipe and an exhaust pipe are disposed on the upper cover body, and a discharge pipe is connected to the bottom of the lower tank body; characterized in that: The heating jacket includes a shell, a heat insulation ring, and a vertical drive assembly; a receiving cavity is formed between the shell and the concentration vessel body, and the receiving cavity is an integral structure, including a tubular part and a base part that matches the bottom of the lower tank; A water inlet pipe A is connected to the right side of the bottom of the shell, and multiple drain pipes are arranged at equal intervals from top to bottom on the left side of the shell; The shape of the heat insulation ring matches the cross-section of the tubular section; the heat insulation ring is set inside the tubular section, and the vertical drive assembly drives the heat insulation ring to move up and down inside the tubular section.

2. The concentration apparatus according to claim 1, characterized in that: The heat insulation ring includes a ring body, and sealing rings are fixedly provided on both the inner and outer ring surfaces of the ring body.

3. The concentration apparatus according to claim 1, characterized in that: The vertical drive assembly includes several motors A, several screws, and several support plates; Several screws are arranged at equal intervals and angles around the tubular part. Each screw has a corresponding support plate at its lower end, and the support plate is fixedly installed inside the housing. The upper end of the screw passes through the upper end face of the housing and is connected to motor A. The screw is rotatably connected to the housing, and the lower end of the screw is rotatably connected to the support plate. The heat insulation ring is provided with several threaded holes; the position and size of the threaded holes are matched with the screw rod, and the threaded holes are threadedly connected to the screw rod. Several motors A synchronously drive the screw to rotate, causing the heat insulation ring to move up and down inside the tubular section.

4. The concentration apparatus according to claim 1, characterized in that: A water inlet pipe B is connected to the left side of the bottom of the shell, and an overflow pipe is installed on the upper part of the right side of the shell.

5. A concentration apparatus according to claim 2, characterized in that: The housing has a rectangular notch, and a rectangular flange window is provided outside the notch; The ring body is provided with a block that matches the flange window and notch; the block extends into the flange window through the notch; sealing strips are provided on the front end face, left end face and right end face of the block.

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