Efficient falling film evaporator

Abstract

The utility model discloses an efficient falling film evaporator, which relates to the technical field of evaporators and comprises an evaporator main body, a circular shell is arranged on the outer surface of the evaporator main body, four groups of exhaust pipes are arranged on the inner wall of the circular shell in a penetrating manner, and a U-shaped shell is arranged at one end of each exhaust pipe in a penetrating manner. The U-shaped shell is arranged, when the efficient falling film evaporator is used, the circular shell is used for circularly distributing heat, hot air enters the circular shell through the air inlets and then is uniformly and dispersedly discharged into the U-shaped shell through the four exhaust pipes, and then the hot air is discharged into the evaporator body through the air outlets. Therefore, the effect of uniformly discharging heat is achieved, and the problem that the evaporation and mass transfer effects are affected due to the fact that the heat is not uniformly distributed in the heating chamber and the temperature of part of the heat exchange tubes is too high or too low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporators, in particular to a high-efficiency falling film evaporator. Background Art

[0002] Falling film evaporator is a common heat transfer device used to evaporate liquid into steam. It mainly consists of a vertical pipe or surface. The liquid flows in from the top and falls along the surface. At the same time, the heat source is usually steam or a heating medium in contact with the surface to heat the liquid to the evaporation temperature. Falling film evaporator usually consists of a vertical pipe or surface, which can be a flat plate or a shell and tube structure. They are commonly used in distillation, concentration and extraction operations in chemical processes. In addition, falling film evaporators can also be used in applications such as seawater desalination, condensation and dehumidification in air-conditioning systems.

[0003] For example, the announcement number CN213100875U discloses a falling film evaporator, including a feed pipe, a liquid distribution assembly and an upper tube plate: the liquid distribution assembly includes a spray piece, a secondary distribution plate and a tube end distributor, the spray piece is connected to the outlet end of the feed pipe, the secondary distribution plate is arranged below the spray piece, and the tube end distributor is arranged below the secondary distribution plate; the upper tube plate is arranged below the tube end distributor, a first opening is arranged on the upper surface of the upper tube plate, a second opening is arranged on the outer wall of the upper tube plate, and the first opening and the second opening are connected to form a sewage channel. The spray piece can spray materials onto the secondary distribution plate so that the materials are evenly distributed on the secondary distribution plate, and this effect is not affected by the inlet flow rate. At the same time, by setting a sewage pipe, impurities that fall on the upper tube plate can be discharged from the sewage channel, thereby avoiding the deposition of impurities on the upper tube plate.

[0004] However, when using this kind of falling film evaporator, the heat source usually transfers heat to the heating chamber through the outer wall of the evaporator. However, due to the limitations of the heat transfer process, the heat distribution in the heating chamber may be uneven, which may cause the temperature of some heat exchange tubes to be too high or too low, thereby affecting the evaporation and mass transfer effects.

[0005] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a high-efficiency falling film evaporator is proposed. Utility Model Content

[0006] The utility model aims to provide a high-efficiency falling film evaporator to solve the problem that the heat is unevenly distributed in the heating chamber, which causes the temperature of some heat exchange tubes to be too high or too low, thus affecting the evaporation and mass transfer effects.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-efficiency falling film evaporator, comprising an evaporator body, the outer surface of the evaporator body is provided with four groups of first through holes, a sealing ring is arranged in the first through hole, the outer surface of the evaporator body is provided with a circular shell, the outer surface of the circular shell is provided with an air inlet, four groups of exhaust pipes are provided on the inner wall of the circular shell, and the exhaust pipes are connected with the first through holes, one end of the exhaust pipe is provided with a U-shaped shell, and the U-shaped shell is located inside the evaporator body, and the U-shaped shell is provided with multiple groups of air outlets.

[0008] Furthermore, a fixing ring is fixedly provided on the evaporator body, and four groups of supporting legs are fixedly provided on the bottom of the fixing ring.

[0009] Furthermore, a discharge port is provided through the bottom of the evaporator body, and a condensed water outlet is provided through the outer surface of the evaporator body.

[0010] Furthermore, a dispersed evaporation tube assembly is provided in the evaporator body, and the dispersed evaporation tube assembly comprises a distribution plate and a heat exchange tube.

[0011] Furthermore, a cover shell is provided on the top of the evaporator body, and a feed port is provided through the cover shell.

[0012] Furthermore, flanges are fixedly provided on the top of the evaporator body and the bottom of the cover shell.

[0013] Furthermore, a circular disk is arranged in the evaporator body, and the circular disk is connected with the feed port.

[0014] Furthermore, a plurality of groups of second through holes are formed in an array through the bottom of the circular disk, and the second through holes correspond to the dispersed evaporation tubes.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model adopts the setting of U-shaped shell. When a high-efficiency falling film evaporator is used, the circular shell is used to circulate and distribute heat. The first through hole is used to provide symmetrical penetration of four groups of exhaust pipes. The sealing ring is used to fill the gaps and uneven surfaces of the connecting parts to prevent the medium from escaping through the leakage path. The exhaust pipe can discharge the hot air into the interior of the evaporator body. The U-shaped shell is provided with four groups, which are respectively connected with the four groups of exhaust pipes. The four groups of U-shaped shells form a circular ring shape and are located on the outside of the dispersed evaporation pipes. After the hot air enters the circular shell through the air inlet, it will be evenly dispersed and discharged into the U-shaped shell through the four groups of exhaust pipes. After that, the hot air will be discharged into the evaporator body through the air outlet, forming an effect of uniform heat discharge, which solves the problem that the uneven distribution of heat in the heating chamber causes the temperature of some heat exchange tubes to be too high or too low, affecting the evaporation and mass transfer effects.

[0017] 2. The utility model adopts the setting of the circular plate. When a high-efficiency falling film evaporator is used, the material can be transmitted into the circular plate through the feed port. The circular plate is in the shape of a shell for evenly dispersing the material. Then the material is discharged through the second through hole and flows into the dispersion evaporation tube, which achieves the effect of evenly distributing the liquid material in each heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body;

[0019] Figure 2 It is a schematic diagram of the planar structure of the evaporator body;

[0020] Figure 3 It is a schematic diagram of the cross-section three-dimensional structure of a circular disk;

[0021] Figure 4 for Figure 2 A magnified schematic diagram of the structure in the middle.

[0022] In the figure: 1. Evaporator body; 11. Fixing ring; 111. Support leg; 112. Discharge port; 113. Condensate outlet; 12. Dispersion evaporation pipe; 13. First through hole; 131. Sealing ring; 2. Cover shell; 21. Flange; 211. Feed port; 212. Round plate; 213. Second through hole; 3. Round shell; 31. Air inlet; 311. Exhaust pipe; 312. U-shaped shell; 313. Air outlet. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] like Figure 1 , Figure 2 and Figure 4As shown, a high-efficiency falling film evaporator comprises an evaporator body 1, the outer surface of the evaporator body 1 is provided with four groups of first through holes 13, a sealing ring 131 is arranged in the first through hole 13, a circular shell 3 is arranged on the outer surface of the evaporator body 1, an air inlet 31 is arranged on the outer surface of the circular shell 3, four groups of exhaust pipes 311 are arranged on the inner wall of the circular shell 3, and the exhaust pipes 311 are connected with the first through holes 13, a U-shaped shell 312 is arranged on one end of the exhaust pipe 311, and the U-shaped shell 312 is located inside the evaporator body 1, and a plurality of air outlets 313 are arranged on the U-shaped shell 312.

[0026] Furthermore, when a high-efficiency falling film evaporator is used, the circular shell 3 is used to circulate and distribute heat, the first through hole 13 is used to provide four groups of exhaust pipes 311 that symmetrically penetrate the shell, the sealing ring 131 is used to fill the gaps and uneven surfaces of the connection parts to prevent the medium from overflowing through the leakage path, and the exhaust pipe 311 can discharge the hot air into the interior of the evaporator body 1. The U-shaped shell 312 is provided with four groups of through-connections with the four groups of exhaust pipes 311 respectively, and the four groups of U-shaped shells 312 form a circular ring shape and are located on the outside of the dispersed evaporation tube 12. After the hot air enters the circular shell 3 through the air inlet 31, it will be evenly dispersed and discharged into the U-shaped shell 312 through the four groups of exhaust pipes 311, and then the hot air will be discharged into the evaporator body 1 through the air outlet 313, forming an effect of uniform heat discharge, thereby solving the problem that the uneven distribution of heat in the heating chamber causes the temperature of some heat exchange tubes to be too high or too low, thus affecting the evaporation and mass transfer effects.

[0027] Furthermore, a fixing ring 11 is fixedly provided on the evaporator main body 1, and four groups of supporting legs 111 are fixedly provided at the bottom of the fixing ring 11. A discharge port 112 is provided through the bottom of the evaporator main body 1, and a condensate outlet 113 is provided through the outer surface of the evaporator main body 1. A dispersed evaporation tube assembly 12 is provided in the evaporator main body 1. The dispersed evaporation tube assembly 12 is a distribution plate and a heat exchange tube. A flange 21 is fixedly provided on the top of the evaporator main body 1 and the bottom of the cover shell 2. The fixing ring 11 and the supporting legs 111 form a function of providing stable support for the evaporator main body 1. The discharge port 112 and the condensate outlet 113 are used to discharge materials and condensate. The flange 21 can provide a stable sealing installation between the cover shell 2 and the top of the evaporator main body 1.

[0028] Embodiment 2

[0029] like Figure 1 and Figure 3As shown, the utility model proposes a high-efficiency falling film evaporator, a cover shell 2 is arranged on the top of the evaporator body 1, a feed port 211 is arranged through the cover shell 2, a circular disk 212 is arranged in the evaporator body 1, and the circular disk 212 is connected with the feed port 211, and a plurality of groups of second through holes 213 are arranged through the bottom array of the circular disk 212, and the second through holes 213 correspond to the dispersed evaporation tubes 12.

[0030] Furthermore, when a high-efficiency falling film evaporator is used, the material can be transmitted into the circular disk 212 through the feed port 211. The circular disk 212 has a shell shape for evenly dispersing the material. The material is then discharged through the second through hole 213 and flows into the dispersion evaporation tube 12, thereby achieving an effect of evenly distributing the liquid material in each heat exchange tube.

[0031] Working principle: When using this high-efficiency falling film evaporator, first, the circular shell 3 is used to circulate and distribute heat, the first through hole 13 is used to provide four groups of exhaust pipes 311 that symmetrically penetrate, and the sealing ring 131 is used to fill the gaps and uneven surfaces of the connecting parts to prevent the medium from escaping through the leakage path. The exhaust pipe 311 can discharge the hot air into the interior of the evaporator body 1, and the U-shaped shell 312 is provided with four groups of through-connections with the four groups of exhaust pipes 311 respectively. The four groups of U-shaped shells 312 form a circular ring shape and are located on the outside of the dispersed evaporation pipe 12. After the hot air enters the circular shell 3 through the air inlet 31, it will be evenly dispersed and discharged into the U-shaped shell 312 through the four groups of exhaust pipes 311, and then the hot air will be discharged into the evaporator body 1 through the air outlet 313, forming an effect of uniform heat discharge, which solves the problem that the uneven distribution of heat in the heating chamber causes the temperature of some heat exchange tubes to be too high or too low, affecting the evaporation and mass transfer effects.

[0032] Finally, when a high-efficiency falling film evaporator is used, the material can be transmitted into the circular disk 212 through the feed port 211. The circular disk 212 has a shell shape for evenly dispersing the material. The material is then discharged through the second through hole 213 and flows into the dispersion evaporation tube 12, thereby achieving an even distribution of the liquid material in each heat exchange tube.

[0033] This is the working principle of this high-efficiency falling film evaporator.

[0034] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A high-efficiency falling film evaporator, comprising an evaporator body (1), characterized in that: The outer surface of the evaporator body (1) is provided with four groups of first through holes (13), and a sealing ring (131) is arranged in each of the first through holes (13). The outer surface of the evaporator body (1) is provided with a circular shell (3), and an air inlet (31) is arranged on the outer surface of the circular shell (3). Four groups of exhaust pipes (311) are arranged on the inner wall of the circular shell (3), and the exhaust pipes (311) are connected to the first through holes (13). A U-shaped shell (312) is arranged on one end of the exhaust pipe (311), and the U-shaped shell (312) is located inside the evaporator body (1), and a plurality of groups of air outlets (313) are arranged on the U-shaped shell (312).

2. A high efficiency falling film evaporator according to claim 1, characterized in that: A fixing ring (11) is fixedly arranged on the evaporator body (1), and four groups of supporting legs (111) are fixedly arranged on the bottom of the fixing ring (11).

3. A high-efficiency falling film evaporator according to claim 2, characterized in that: A discharge port (112) is provided through the bottom of the evaporator body (1), and a condensed water outlet (113) is provided through the outer surface of the evaporator body (1).

4. A high-efficiency falling film evaporator according to claim 2, characterized in that: A dispersed evaporation tube (12) is arranged in the evaporator body (1), and the dispersed evaporation tube (12) is a distribution plate and a heat exchange tube.

5. A high-efficiency falling film evaporator according to claim 2, characterized in that: A cover shell (2) is provided on the top of the evaporator body (1), and a feed port (211) is provided through the cover shell (2).

6. A high-efficiency falling film evaporator according to claim 2, characterized in that: The top of the evaporator body (1) and the bottom of the cover shell (2) are both fixedly provided with flanges (21).

7. A high-efficiency falling film evaporator according to claim 6, characterized in that: A circular disk (212) is arranged inside the evaporator body (1), and the circular disk (212) is connected to the feed port (211).

8. A high-efficiency falling film evaporator according to claim 7, characterized in that: A plurality of groups of second through holes (213) are arranged in an array through the bottom of the circular plate (212), and the second through holes (213) correspond to the dispersion evaporation tubes (12).

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