Falling film evaporator with rotating disc

Abstract

The utility model discloses a falling film evaporator with rotary disc, including evaporator main part, the inside of evaporator main part is equipped with vertical and can rotate's pivot, pivot is along the axial and is equipped with a plurality of interval and parallel distribution's disc body, pivot drives disc body and rotates, the inner wall of evaporator main part is equipped with the isolating sheet above every disc body, the isolating sheet one end is connected to the inner wall of evaporator main part, and the other end extends to the above place of the center of corresponding disc body, the height of isolating sheet is from the edge to the center place of disc body gradually small tendency, be provided with the feed inlet, the discharge port on evaporator main part, the top of evaporator main part is equipped with gas outlet, gas outlet is connected with the condenser of being provided with. The utility model makes evaporate more quickly, efficiency.

Description

Technical Field

[0001] This utility model relates to the field of thin-film evaporator technology, and in particular to a falling film evaporator with a rotating disk. Background Technology

[0002] A falling film evaporator is a type of evaporator in which a heated liquid is fed into the evaporator through a feed pipe. The liquid is then evenly distributed into each heat exchange tube by a liquid distribution and film-forming device. Under the influence of gravity and airflow, the liquid forms a uniform film that flows downwards. During this flow, the liquid is heated and vaporized by the heating medium. The resulting vapor and liquid phase enter the separation chamber of the evaporator together, where they are thoroughly separated. The vapor enters the condenser for condensation or enters the next effect evaporator as a heating medium, thus achieving multi-effect operation. The liquid phase is discharged from the separation chamber. Most film evaporators rely on the movement of the liquid under gravity to operate. The fluidity of the liquid affects the quality of film formation, evaporation, and separation. However, the downward flow of the liquid due to gravity limits the overall evaporation mass transfer efficiency. Utility Model Content

[0003] The purpose of this invention is to design a falling film evaporator with a rotating disk to overcome the shortcomings of the above-mentioned technology.

[0004] This utility model designs a falling film evaporator with a rotating disc, including an evaporator body. Inside the evaporator body is a vertically rotatable shaft. Multiple spaced and parallel discs are arranged along the axial direction of the shaft, driving the discs to rotate. An isolation plate is provided above each disc on the inner wall of the evaporator body. One end of the isolation plate is connected to the inner wall of the evaporator body, and the other end extends to above the center of the corresponding disc. The height of the isolation plate gradually decreases from the edge to the center of the disc. The evaporator body is provided with a feed inlet and a discharge outlet. A gas outlet is provided at the top of the evaporator body, and a condenser is connected to the gas outlet.

[0005] Preferably, a droplet collector is provided between the gas outlet and the condenser.

[0006] In a further optimization, one end of the condenser is connected to the evaporator body via a droplet collector, and the other end is connected to a second storage tank.

[0007] To further optimize the process, a gas-liquid separator is provided between the condenser and the second storage tank.

[0008] For further optimization, the gas-liquid separator is also connected to a cryocooler.

[0009] Further optimization involves connecting the cryostat to a vacuum system.

[0010] Preferably, the feed inlet is provided with a feed pipe, one end of which extends into the interior of the evaporator body and extends to the center above the topmost plate.

[0011] Further optimization involves connecting a heat exchanger to the other end of the feed pipe.

[0012] Further optimization includes a first storage tank for providing the liquid to be evaporated at the bottom of the evaporator body, the first storage tank being connected to the heat exchanger via a pump body; and a recovery tank for collecting and recovering the liquid at the bottom of the evaporator body, the recovery tank being connected to the discharge port.

[0013] The technical advantage of this invention is that the evaporator body has a rotating shaft inside, and multiple spaced and parallel disks are arranged along the axial direction of the rotating shaft. The disks rotate synchronously with the rotating shaft, and funnel-shaped isolation plates are provided between adjacent disks. The liquid entering the evaporator body passes through the disks and isolation plates in sequence from top to bottom. The centrifugal force generated by the rotation of the disks turns the liquid into a relatively uniform liquid film. Then, under the action of centrifugal force, the liquid film is sprayed onto the inner wall of the evaporator body and falls along the inner wall to the isolation plate located below. The liquid on the isolation plate flows to the central through hole and falls into the next disk through the through hole. This process is repeated, so that the liquid undergoes layer-by-layer film formation, evaporation and separation from top to bottom, making the evaporation faster and more efficient. Attached Figure Description

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

[0015] In the diagram: 1. Evaporator body; 2. Rotating shaft; 3. Disc; 4. Isolation plate; 5. Feed inlet; 6. Discharge outlet; 7. Gas outlet; 8. Condenser; 9. Droplet collector; 10. Second storage tank; 11. Gas-liquid separator; 12. Deep cooler; 13. Vacuum system; 14. Feed pipe; 15. Heat exchanger; 16. First storage tank; 17. Pump body; 18. Recovery tank. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0017] This utility model includes an evaporator body 1, which is an evaporator with an evaporation chamber inside. Figure 1As shown, the evaporator body 1 has a vertical and rotatable shaft 2 inside. The evaporator body 1 is equipped with a drive motor for driving the shaft 2 to rotate. The drive motor not only controls the rotation of the shaft 2, but also controls the direction and speed of the shaft 2. A rotating shaft 2 has multiple discs 3 arranged axially. The discs 3 are spaced vertically and arranged in parallel. The discs 3 rotate synchronously with the rotating shaft 2, which is located at the center of the discs 3. In this embodiment, the upper surface of the disc 3 is horizontal. The edge of the disc 3 is close to the evaporator body 1. The evaporator body 1 has an isolation plate 4 above each disc 3. In this embodiment, the isolation plate 4 is also disc-shaped. The edge of the isolation plate 4 is connected to the inner wall of the evaporator body 1. That is, one end of the isolation plate 4 is connected to the inner wall of the evaporator body 1, and the other end extends to the center above the corresponding disc 3. A through hole is opened in the center of the isolation plate 4. The isolation plate 4 is inclined so that the height of the isolation plate 4 gradually decreases from the edge of the disc 3 to the center. That is, the isolation plate 4 has a funnel-shaped structure, so that the liquid falling on the isolation plate 4 can flow along the surface of the isolation plate 4 from the edge to the central through hole, and then fall into the next disc 3 through the through hole.

[0018] The evaporator body 1 is provided with a feed inlet 5 and a discharge outlet 6. The feed inlet 5 is located at the top of the evaporator body 1, and the discharge outlet 6 is located at the bottom of the evaporator body 1. The top of the evaporator body 1 is provided with a gas outlet 7, and a condenser 8 is connected to the gas outlet 7.

[0019] A feed pipe 14 is provided at the feed inlet 5. One end of the feed pipe 14 extends into the interior of the evaporator body 1 and extends to the center above the top plate 3, so that the liquid to be evaporated can be fed into the center of the top plate 3 after entering from the feed inlet 5.

[0020] When the liquid to be evaporated enters through the feed inlet 5, it falls into the center of the topmost dish 3. As the dish 3 rotates with the shaft 2, the liquid on the topmost dish 3 is dispersed into a thin, uniform liquid film under the centrifugal force of the dish 3. Under the centrifugal force of the dish 3, the liquid film moves towards the edge of the dish 3 and splashes onto the inner wall of the evaporator body 1, then falls down along the edge of the dish 3 and the inner wall of the evaporator body 1. Since there is an isolation plate 4 below the dish 3, which is connected to the inner wall of the evaporator body 1, the liquid falling from the edge of the dish 3 will directly fall onto the isolation plate. At the edge of plate 4, because the separator plate 4 is funnel-shaped, it continues to fall from the central through hole to the next plate 3. The next plate 3 continues to rotate, and so on, so that the liquid material passes through multiple rotating plates 3 from top to bottom. During this process, the liquid material continuously gathers into a film, evaporates and vaporizes, and separates. The evaporation here is the evaporation of low-boiling-point substances in the liquid film. The evaporated gaseous substances will move up and down, and in the process of moving up and down, they will exchange substances with the liquid film of plate 3, so that high-boiling-point substances will enter the liquid film and overflow the substances with higher boiling points, so as to achieve more effective separation of low-boiling-point substances from the liquid phase, and ultimately improve the overall working efficiency.

[0021] It should be noted that evaporation is usually completed when the liquid falls from one plate 3 to the next plate 3.

[0022] In this embodiment, the evaporator body 1 can be single-stage or multi-stage, preferably three to four stages.

[0023] A droplet collector 9 is provided between the gas outlet 7 and the condenser 8 to prevent droplets from entering the gas as it enters the condenser 8.

[0024] One end of the condenser 8 is connected to the evaporator body 1 via a droplet collector 9, and the other end is connected to a second storage tank 10. The gas coming out of the evaporator body 1 enters the condenser 8 to condense the gas, and the condensed liquid enters the second storage tank 10 for collection.

[0025] A gas-liquid separator 11 is provided between the condenser 8 and the second storage tank 10 to facilitate the separation of uncondensed gas and liquid. The gas-liquid separator 11 is also connected to a cryogenic cooler 12, so that the uncondensed gas enters the cryogenic cooler 12 for further condensation, and finally achieves complete condensation. The liquid condensed by the cryogenic cooler 12 returns to the gas-liquid separator 11, is further separated by the gas-liquid separator 11, and the separated liquid flows into the second storage tank 10.

[0026] The cryogenic chamber 12 is connected to a vacuum system 13. The vacuum system 13 evacuates the inner liner of the cryogenic chamber 12. The vacuum environment isolates the liquid from the heat exchange with the outside of the insulated container, so that the cryogenic chamber 12 becomes a low-temperature vacuum insulated container that meets the standards for holding liquid.

[0027] The other end of the feed pipe 14 is connected to a heat exchanger 15. Below the evaporator body 1, there is a first storage tank 16 for providing the liquid to be evaporated. The first storage tank 16 is connected to the heat exchanger 15 through a pump body 17. The pump body 17 draws the liquid to be evaporated in the first storage tank 16 to the feed pipe 14. Before entering the feed pipe 14, the liquid passes through the heat exchanger 15. The heat exchanger 15 preheats the liquid to promote the phase change from liquid to gas.

[0028] Below the evaporator body 1, there is also a recovery tank 18 for collecting and recycling liquid. The recovery tank 18 is connected to the discharge port 6. After evaporation, part of the liquid inside the evaporator body 1 will flow to the bottom of the evaporator body 1 and then flow into the recovery tank 18 through the discharge port 6 for recycling and reuse, thus preventing the liquid from being wasted.

[0029] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A falling film evaporator with a rotating disk, characterized in that, The evaporator includes an evaporator body (1), which has a vertically rotatable shaft (2) inside. The shaft (2) has multiple spaced and parallel disks (3) arranged along the axial direction. The shaft (2) drives the disks (3) to rotate. The inner wall of the evaporator body (1) has an isolation plate (4) above each disk (3). One end of the isolation plate (4) is connected to the inner wall of the evaporator body (1), and the other end extends to the center above the corresponding disk (3). The height of the isolation plate (4) gradually decreases from the edge of the disk (3) to the center. The evaporator body (1) is provided with a feed inlet (5) and a discharge outlet (6). The top of the evaporator body (1) is provided with a gas outlet (7), which is connected to a condenser (8).

2. A falling film evaporator with a rotating disk according to claim 1, characterized in that, A droplet collector (9) is provided between the gas outlet (7) and the condenser (8).

3. A falling film evaporator with a rotating disk according to claim 2, characterized in that, One end of the condenser (8) is connected to the evaporator body (1) via a droplet collector (9), and the other end is connected to a second storage tank (10).

4. A falling film evaporator with a rotating disk according to claim 3, characterized in that, A gas-liquid separator (11) is provided between the condenser (8) and the second storage tank (10).

5. A falling film evaporator with a rotating disk according to claim 4, characterized in that, The gas-liquid separator (11) is also connected to a cryocooler (12).

6. A falling film evaporator with a rotating disk according to claim 5, characterized in that, The cryogenic device (12) is connected to a vacuum system (13).

7. A falling film evaporator with a rotating disk according to claim 1, characterized in that, The feed inlet (5) is provided with a feed pipe (14), one end of which extends into the interior of the evaporator body (1) and extends to the center above the top plate (3).

8. A falling film evaporator with a rotating disk according to claim 7, characterized in that, The other end of the feed pipe (14) is connected to a heat exchanger (15).

9. A falling film evaporator with a rotating disk according to claim 8, characterized in that, The evaporator body (1) is provided with a first storage tank (16) for providing the liquid to be evaporated below it. The first storage tank (16) is connected to the heat exchanger (15) through a pump body (17). The evaporator body (1) is also provided with a recovery tank (18) for collecting and recovering the liquid below it. The recovery tank (18) is connected to the discharge port (6).

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