Falling film evaporator

Abstract

The utility model relates to material distillation technical field especially drop film evaporation device, including processing box and heating pipe, and the processing box is opened with gas outlet, is provided with the sealed cylinder in the processing box, and the sealed cylinder is installed with the pump body and liquid distributor of electricity connection, is provided with the spray head that is linked with liquid distributor and carries out the spraying of heating pipe on the sealed cylinder, is fixedly installed with the support on the processing box. The utility model discloses through setting up the liquid distributor and the spray head that cooperate in the processing box, liquid distributor can even distribution's spraying of liquid on heating pipe, can evaporate into steam quickly, makes the energy consumption of material when distillation low, through setting up the support in the processing box, and the driving structure in the support can drive the rotation and the lifting of sealing cap, the position of spray head can be adjusted when sealing cap rotates and lifts, and further make spray head can carry out the overall spraying of heating pipe, further improve evaporation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of material distillation technology, and in particular to a falling film evaporation device. Background Technology

[0002] Polyvinylpyrrolidone (PVP, or polyvinylpyrrolidone in the pharmaceutical industry) is a polymer formed by the polymerization of N-vinyl-2-pyrrolidone. It has both hydrophilic and hydrophobic properties and is chemically stable. It is the most distinctive and most extensively studied fine chemical among N-vinylamide polymers.

[0003] According to a novel falling film evaporator disclosed in CN217139221U, a cylindrical body is included, with a liquid inlet pipe and a steam outlet pipe at the top. The device utilizes a cross-flow process, preventing scale buildup in the heating tubes and ensuring the fluidity of the liquid film for efficient heat exchange. However, the aforementioned document proposes using a steam inlet pipe to transport the liquid generated during heating. PVP is typically produced from vinylpyrrolidone (NVP) monomers via an acetylene process, specifically using 2-pyrrolidone as a raw material, through an addition reaction with acetylene gas, followed by distillation purification. This evaporation method is energy-intensive, and the steam outlet pipe fails to increase the contact between the heating tubes and the liquid, thus affecting the efficiency of material distillation. Utility Model Content

[0004] The purpose of this invention is to solve the problem of low material distillation and evaporation efficiency in the prior art, and to propose a falling film evaporation device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A falling film evaporation device includes a processing box and a heating tube. The processing box has an air outlet. A sealing cylinder is installed inside the processing box, and a pump body and a liquid distributor connected by electricity are installed inside the sealing cylinder. A spray nozzle connected to the liquid distributor and spraying the heating tube is installed on the sealing cylinder. A bracket is fixedly installed on the processing box, and a drive structure for driving the sealing cylinder to rotate and lift is installed on the bracket.

[0006] Preferably, the driving structure includes a ring frame slidably sleeved on the bracket, and a connecting plate is fixedly installed on the ring frame. A guide post is fixedly installed on the connecting plate, and a sliding sleeve is slidably sleeved on the guide post. The sealing cylinder is disposed on the sliding sleeve. A ring-shaped rack is integrally connected to the ring frame. A motor is fixedly installed on the bracket, and the output end of the motor is fixedly connected to a rotating shaft that is connected to the ring-shaped rack for transmission. A support plate is integrally connected to the guide post, and a motor is fixedly installed on the support plate. A lead screw is fixedly connected to the output end of the motor, and a matching nut is slidably sleeved on the lead screw. A support rod is integrally connected between the nut and the sliding sleeve.

[0007] Preferably, the bracket has a groove for guiding the ring frame, the ring frame is a ring-shaped structure, and the guide post is vertically arranged below the bracket.

[0008] Preferably, the connecting plate has an L-shaped structure, and a guide block extending into the guide post is integrally connected to the sliding sleeve. A guide groove for guiding the guide block is provided in the guide post.

[0009] Preferably, the annular rack and ring frame extend to the upper end of the bracket, the rotating shaft is vertically arranged, and a gear that meshes with the annular rack is fixedly installed on the rotating shaft.

[0010] Preferably, the lead screw is vertically positioned on one side of the guide post, and a sealing cover that cooperates with the motor is fixedly installed on the support plate.

[0011] Compared with the prior art, the present invention has the following advantages: 1. This utility model provides a matching liquid distributor and nozzle inside the processing box. The liquid distributor can spray the liquid evenly onto the heating tube, which can quickly evaporate into steam, thus reducing energy consumption during material distillation.

[0012] 2. This utility model provides a support frame inside the processing box, and the drive structure inside the support frame can drive the sealing cover to rotate and rise. When the sealing cover rotates and rises, it can adjust the position of the nozzle, thereby enabling the nozzle to spray the heating tube comprehensively and further improve the evaporation efficiency. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the processing box of the falling film evaporation device proposed in this utility model; Figure 2 This is a schematic diagram of the falling film evaporation device proposed in this utility model; Figure 3 This is a cross-sectional view of the falling film evaporation device proposed in this utility model; Figure 4 This is a side sectional view of the falling film evaporation device proposed in this utility model.

[0014] In the diagram: 1. Processing box; 2. Heating tube; 3. Sealing cylinder; 4. Nozzle; 5. Bracket; 6. Ring frame; 7. Connecting plate; 8. Guide post; 9. Sliding sleeve; 10. Guide block; 11. Ring rack; 12. Motor 1; 13. Gear; 14. Motor 2; 15. Lead screw; 16. Nut. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1-4 The falling film evaporation device includes a processing box 1 and a heating tube 2. The processing box 1 is provided with an air outlet. A sealing cylinder 3 is provided inside the processing box 1. A pump body and a liquid distributor connected by electricity are installed inside the sealing cylinder 3. After the liquid distributor is powered on, it distributes the liquid evenly on the top of the packing layer and then distributes it evenly.

[0017] The sealing cylinder 3 is equipped with a nozzle 4 that is connected to the liquid distributor and sprays the heating tube 2. By setting the nozzle 4 on the sealing cylinder 3 corresponding to the heating tube 2, the liquid sprayed by the nozzle 4 can be evenly sprayed on the heating tube 2. A bracket 5 is fixedly installed on the processing box 1, and a drive structure for driving the sealing cylinder 3 to rotate and lift is set on the bracket 5.

[0018] The driving structure includes a ring frame 6 that is slidably sleeved on the bracket 5, and a connecting plate 7 is fixedly installed on the ring frame 6. The bracket 5 has a groove for guiding the ring frame 6. The ring frame 6 is a ring-shaped structure. The guide post 8 is vertically arranged below the bracket 5. The groove in the bracket 5 guides the ring frame 6, so that the ring frame 6 can smoothly pull the connecting plate 7 when it moves.

[0019] A guide post 8 is fixedly installed on the connecting plate 7, and a sliding sleeve 9 is slidably sleeved on the guide post 8. The sealing cylinder 3 is located on the sliding sleeve 9. The connecting plate 7 has an L-shaped structure. A guide block 10 extending into the guide post 8 is integrally connected to the sliding sleeve 9. A guide groove is opened in the guide post 8 to guide the guide block 10. The guide post 8 guides the sliding sleeve 9, and the guide groove guides the guide block 10, so that the sliding sleeve 9 can move along a specified route.

[0020] A ring rack 11 is integrally connected to the ring frame 6. A motor 12 is fixedly installed on the bracket 5, and the output end of the motor 12 is fixedly connected to a rotating shaft that is connected to the ring rack 11 for transmission. The ring rack 11 and the ring frame 6 extend to the upper end of the bracket 5. The rotating shaft is vertically set, and a gear 13 that meshes with the ring rack 11 is fixedly installed on the rotating shaft. When the rotating shaft rotates, it drives the ring frame 6 to rotate through the meshing gear 13 and the ring rack 11. When the ring frame 6 and the connecting plate 7 rotate, the spray angle of the nozzle 4 is adjusted, thereby increasing the contact area between the liquid and the heating tube 2, so that the energy consumption of the material is low during distillation.

[0021] A support plate is integrally connected to the guide column 8, and a motor 14 is fixedly installed on the support plate. A lead screw 15 is fixedly connected to the output end of the motor 14, and a matching nut 16 is slidably sleeved on the lead screw 15. A support rod is integrally connected between the nut 16 and the sliding sleeve 9. The lead screw 15 is vertically set on one side of the guide column 8. A sealing cover that cooperates with the motor 14 is fixedly installed on the support plate. The sealing cover protects the motor 14. When the nut 16 is raised and lowered, it drives the sliding sleeve 9 to move on the guide column 8. Through the rotation and rise or fall of the nozzle 4, the nozzle 4 sprays the heating tube 2 comprehensively when it is spirally raised and lowered. The liquid is sprayed onto the wall of the heating tube, forming a thin liquid film. Because the liquid film is extremely thin, the heating area is large, and the heat conduction efficiency is high, the liquid can be evaporated into steam in a short time, which can further improve the evaporation efficiency.

[0022] The functional principle of this utility model can be explained through the following operation methods: During distillation, heating tube 2 supplies water. The controller sends an start signal to the pump body, and the pump body sends an start command to the liquid distributor. After the liquid distributor is powered on, the liquid is sprayed through the nozzle 4 onto the heating tube 2. The liquid forms a thin liquid film on the heating tube 2, causing the liquid to evaporate into steam and be discharged from the outlet. The controller sends an start signal to motor 12 and motor 24; The output end of motor 12 drives the rotating shaft to rotate, and the rotating shaft drives gear 13 to pull the meshing ring rack 11. The ring rack 11 drives the ring frame 6 to slide in the groove. The ring frame 6 drives the guide post 8 to move through the connecting plate 7. When the guide post 8 moves, it drives the sliding sleeve 9 and the sealing cylinder 3 to rotate. When the sealing cylinder 3 rotates, it drives the nozzle 4 to rotate around the center of the bracket 5, so that the liquid sprayed by the nozzle 4 can be sprayed all over the heating tube 2. At the same time, the output end of motor 14 drives the lead screw 15 to rotate. When the lead screw 15 rotates, it drives the nut 16 to move up or down. When the nut 16 moves up or down, it drives the support rod and the sliding sleeve 9 to move, so that the sliding sleeve 9 drives the guide block 10 to slide in the guide groove. In turn, the sliding sleeve 9 moves up or down during the rotation, so that the nozzle 4 can spray the liquid comprehensively.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A falling film evaporation apparatus, comprising a processing chamber (1) and a heating tube (2), wherein the processing chamber (1) is provided with an air outlet, characterized in that, The processing box (1) is equipped with a sealing cylinder (3), and the sealing cylinder (3) is equipped with an electrically connected pump body and a liquid distributor. The sealing cylinder (3) is equipped with a spray nozzle (4) that is connected to the liquid distributor and sprays the heating tube (2). The processing box (1) is fixedly equipped with a bracket (5), and the bracket (5) is equipped with a drive structure that drives the sealing cylinder (3) to rotate and lift.

2. The falling film evaporator according to claim 1, characterized in that, The driving structure includes a ring frame (6) that is slidably sleeved on the bracket (5), and a connecting plate (7) is fixedly installed on the ring frame (6). A guide post (8) is fixedly installed on the connecting plate (7), and a sliding sleeve (9) is slidably sleeved on the guide post (8). The sealing cylinder (3) is located on the sliding sleeve (9). A ring rack (11) is integrally connected to the ring frame (6). A motor (12) is fixedly installed on the bracket (5). The output end of the motor (12) is fixedly connected to a rotating shaft that is connected to the ring rack (11) for transmission. A support plate is integrally connected to the guide post (8). A motor (14) is fixedly installed on the support plate. A lead screw (15) is fixedly connected to the output end of the motor (14). A matching nut (16) is slidably sleeved on the lead screw (15). A support rod is integrally connected between the nut (16) and the sliding sleeve (9).

3. The falling film evaporator according to claim 2, characterized in that, The bracket (5) has a groove for guiding the ring frame (6). The ring frame (6) is a ring structure. The guide post (8) is vertically arranged below the bracket (5).

4. The falling film evaporator according to claim 2, characterized in that, The connecting plate (7) has an L-shaped structure, and the sliding sleeve (9) is integrally connected with a guide block (10) extending into the guide post (8). The guide post (8) has a guide groove for guiding the guide block (10).

5. The falling film evaporator according to claim 2, characterized in that, The annular rack (11) and the ring frame (6) extend to the upper end of the bracket (5). The rotating shaft is vertically arranged, and a gear (13) that meshes with the annular rack (11) is fixedly installed on the rotating shaft.

6. The falling film evaporator according to claim 2, characterized in that, The lead screw (15) is vertically positioned on one side of the guide post (8), and a sealing cover that cooperates with the motor (14) is fixedly installed on the support plate.

Images