Liquid distribution device

Abstract

According to the liquid distribution device, a supporting plate is arranged in a container and located below a tube plate, a plurality of through holes for heat exchange tubes to penetrate through are formed in the supporting plate, a liquid distributor is cylindrical, is arranged on the heat exchange tubes in a sleeving mode and is arranged in the through holes, and a spiral groove for liquid distribution is formed in the inner wall of the liquid distributor. According to the liquid distribution device, due to the fact that the spiral groove is formed in the inner wall of the liquid distributor and the heat exchange pipe is arranged in the liquid distributor, materials can make contact with the outer wall of the heat exchange pipe when flowing downwards through the spiral groove, and then the materials can be evenly distributed in the horizontal direction and the vertical direction of the heat exchange pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of falling film heat exchangers, in particular to a liquid distribution device. Background Art

[0002] Falling film heat exchangers are divided into horizontal tube falling film and vertical falling film. Vertical falling film is further divided into inner tube falling film and outer tube falling film. The outer tube falling film is a flow state in which the material flows downward along the heat transfer tube under the action of gravity, forming a thin film on the surface of the heat transfer tube. It has the characteristics of high heat transfer coefficient, high heat flux density, and short material heating time. Therefore, the application of outer tube vertical falling film technology to evaporators has the characteristics of higher evaporation capacity and lower operating costs. However, since the material flows in a film-like manner on the surface of the heat transfer tube in the vertical outer tube falling film evaporator, a liquid distribution device that can evenly distribute the material to the outer surface of the heat transfer tube and has a simple structure and easy installation is urgently needed for the vertical outer tube falling film heat exchanger. Utility Model Content

[0003] In view of this, an embodiment of the present invention provides a liquid distribution device to evenly distribute the material to the outer surface of the heat exchange tube.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The utility model discloses a liquid distributing device.

[0006] The absorption heat exchange unit includes a tube sheet, a container, and a plurality of heat exchange tubes vertically arranged in the container.

[0007] The tube sheet is arranged on the top of the heat exchange tube;

[0008] The liquid distributing device comprises: a support plate and a plurality of liquid distributing devices;

[0009] The support plate is arranged in the container and is located below the tube plate. The support plate is provided with a plurality of through holes for the heat exchange tubes to pass through.

[0010] The liquid distributor is cylindrical, sleeved on the heat exchange tube, and arranged in the through hole;

[0011] The inner wall of the liquid distributor is provided with a spiral groove for distributing liquid.

[0012] Preferably, the upper portion of the outer wall of the liquid distributor is provided with a first limiting member for limiting the upper portion of the liquid distributor from passing through the through hole.

[0013] Preferably, the first limiting member is an annular limiting ring;

[0014] The outer diameter of the first limiting member is greater than the inner diameter of the through hole.

[0015] Preferably, the first limiting member and the liquid distributor are an integrated structure.

[0016] Preferably, a plurality of spiral grooves are provided on the inner wall of the liquid distributor.

[0017] Preferably, a second limiting member for limiting the liquid distributor from passing through the through hole is further provided at the lower portion of the outer wall of the liquid distributor.

[0018] Preferably, the cross section of the second limiting member is a triangular structure, and the thickness of the second limiting member gradually decreases from top to bottom.

[0019] Preferably, a plurality of second limiting members are provided along the circumference of the liquid distributor.

[0020] Based on the above-mentioned liquid distribution device provided by the utility model, a support plate is arranged in a container and is located below the tube plate. The support plate is provided with multiple through holes for the heat exchange tubes to pass through. The liquid distributor is cylindrical and is mounted on the heat exchange tubes and is arranged in the through holes. The inner wall of the liquid distributor is provided with spiral grooves for distributing liquid. Through the above-mentioned disclosed liquid distribution device, since the inner wall of the liquid distributor is provided with spiral grooves and the heat exchange tubes are arranged in the liquid distributor, the material can contact the outer wall of the heat exchange tubes when flowing downward through the spiral grooves, thereby allowing the material to be evenly distributed in both horizontal and vertical directions of the heat exchange tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of a liquid dispensing device provided in an embodiment of the present utility model;

[0023] Figure 2 A schematic structural diagram of a liquid distributor provided in an embodiment of the present utility model;

[0024] Figure 3 A partial cross-sectional view of a liquid distributing device provided in an embodiment of the present utility model.

[0025] Among them, there are the tube sheet 1, the container 2, the material liquid inlet 21, the heat exchange tube 3, the support plate 4, the liquid distributor 5, the spiral groove 51, the first limiter 52, and the second limiter 53. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The embodiment of the present invention provides a liquid distribution device, which is applicable to an absorption heat exchange unit. The absorption heat exchange unit comprises: a tube sheet 1, a container 2 and a plurality of heat exchange tubes 3 vertically arranged in the container 2;

[0028] The tube sheet 1 is arranged on the top of the heat exchange tube 3;

[0029] See also Figures 1 to 3 , Figure 1 Schematic diagram of the structure of the liquid distributing device, the liquid distributing device comprises: a support plate 4 and a plurality of liquid distributors 5;

[0030] The support plate 4 is disposed in the container 2 and is located below the tube sheet 1. The support plate 4 is provided with a plurality of through holes for the heat exchange tubes 3 to pass through.

[0031] The liquid distributor 5 is cylindrical, sleeved on the heat exchange tube 3, and arranged in the through hole;

[0032] The inner wall of the liquid distributor 5 is provided with a spiral groove 51 for distributing liquid.

[0033] It should be noted that the spiral groove 51 opened on the inner wall of the liquid distributor 5 is connected to both ends of the liquid distributor 5. Therefore, when the heat exchange tube 3 is installed in the liquid distributor 5, the material can contact the outer wall of the heat exchange tube 3 when flowing downward through the spiral groove 51, thereby allowing the material to be evenly distributed in both the horizontal and vertical directions of the heat exchange tube 3.

[0034] In the embodiment of the present invention, a support plate 4 is disposed within the container 2 and below the tube sheet 1. The support plate 4 is provided with a plurality of through-holes for the passage of the heat exchange tubes 3. The liquid distributor 5 is cylindrical and sleeved over the heat exchange tubes 3 and disposed within the through-holes. The inner wall of the liquid distributor 5 is provided with spiral grooves 51 for distributing liquid. With the disclosed liquid distribution device, since the inner wall of the liquid distributor 5 is provided with spiral grooves 51 and the heat exchange tubes 3 are disposed within the liquid distributor 5, the material can contact the outer wall of the heat exchange tubes 3 as it flows downward through the spiral grooves 51, thereby allowing the material to be evenly distributed in both the horizontal and vertical directions along the heat exchange tubes 3.

[0035] Furthermore, a first limiting member 52 is provided on the upper portion of the outer wall of the liquid distributor 5 for limiting the upper portion of the liquid distributor 5 from passing through the through hole.

[0036] It should be noted that by providing a first limiter 52 on the upper part of the outer wall of the liquid distributor 5 to limit the upper part of the liquid distributor 5 from passing through the through hole, the liquid distributor 5 can be prevented from escaping from the through hole under the action of its own gravity.

[0037] Specifically, the first limiting member 52 is an annular limiting ring;

[0038] The outer diameter of the first limiting member 52 is larger than the inner diameter of the second through hole.

[0039] It should be noted that the first limit member 52 is set as an annular limit member, and the outer diameter of the first limit member 52 is larger than the inner diameter of the through hole, so that the first limit member 52 forms a certain seal with the upper end face of the through hole under the action of its own gravity, thereby preventing material from passing through the gap between the second cylinder and the through hole.

[0040] Specifically, the first limiting member 52 and the liquid distributor 5 are an integrated structure.

[0041] It should be noted that providing the first limiting member 52 and the liquid distributor 5 as an integrated structure can simplify the assembly steps and improve the installation efficiency.

[0042] Furthermore, a plurality of spiral grooves 51 are formed on the inner wall of the liquid distributor 5 .

[0043] It should be noted that the number and width of the spiral grooves 51 opened on the inner wall of the liquid distributor 5, the pitch, etc. need to depend on the characteristics of the material itself and the operating flow rate. Those skilled in the art can set the number of spiral grooves 51 accordingly according to needs. This application does not make any specific restrictions on the number of spiral grooves 51.

[0044] Furthermore, a second limiting member 53 for limiting the liquid distributor 5 from passing through the through hole is provided at the lower portion of the outer wall of the liquid distributor 5 .

[0045] It should be noted that, by providing a second limiting member 53 at the lower part of the outer wall of the liquid distributor 5 for limiting the liquid distributor 5 from passing through the through hole, it can cooperate with the first limiting member 52 during operation to prevent the liquid distributor 5 from moving downward in the vertical direction, so as to avoid separation of the liquid distributor 5 from the tube sheet 1.

[0046] Specifically, the cross section of the second limiting member 53 is a triangular structure, and the thickness of the second limiting member 53 gradually decreases from top to bottom.

[0047] It should be noted that the cross-section of the second limiting member 53 is a triangular structure, and the thickness of the second limiting member 53 gradually decreases from top to bottom. Therefore, during installation, it is only necessary to align the lower end of the second cylinder with the second through hole, and then use a hammer to knock the second limiting member 53 through the second through hole to achieve installation. Therefore, the liquid distribution device of the present application has a simple structure and can effectively improve the installation efficiency.

[0048] Specifically, a plurality of second limiting members 53 are provided along the circumference of the liquid distributor 5 .

[0049] It should be noted that, by providing a plurality of second limiting members 53 along the circumference of the liquid distributor 5, the plurality of second limiting members 53 can further limit the liquid distributor 5 by cooperating with the first limiting member 52, thereby further preventing the liquid distributor 5 from being displaced in the vertical direction during operation, so as to prevent the liquid distributor 5 from being separated from the tube sheet 1.

[0050] Preferably, the liquid distributing device further comprises: a liquid distributing plate;

[0051] The liquid distribution plate is arranged above the support plate 4 , and the material liquid inlet 21 is located between the liquid distribution plate and the tube plate 1 . The liquid distribution plate is used to evenly distribute the material to the upper end surface of the support plate 4 .

[0052] It should be noted that the material has a certain impact force when entering the support plate 4 through the material liquid inlet 21, and the material distribution is uneven. The liquid distribution plate is set above the support plate 4, and the material liquid inlet 21 is located between the liquid distribution plate and the tube plate 1, so that the entering material flows evenly to the support plate 4 under the action of the liquid distribution plate, thereby ensuring that the material can evenly flow into multiple spiral grooves 51, so that the material can be evenly distributed on the heat exchange tube 3.

[0053] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid dispensing device, characterized in that: Applicable to an absorption heat exchange unit, the absorption heat exchange unit comprising: a tube sheet, a container and a plurality of heat exchange tubes vertically arranged in the container; The tube sheet is arranged on the top of the heat exchange tube; The liquid distributing device comprises: a support plate and a plurality of liquid distributing devices; The support plate is arranged in the container and is located below the tube plate. The support plate is provided with a plurality of through holes for the heat exchange tubes to pass through. The liquid distributor is cylindrical, sleeved on the heat exchange tube, and arranged in the through hole; The inner wall of the liquid distributor is provided with a spiral groove for distributing liquid.

2. The liquid dispensing device according to claim 1, characterized in that: The upper portion of the outer wall of the liquid distributor is provided with a first limiting member for limiting the upper portion of the liquid distributor from passing through the through hole.

3. The liquid dispensing device according to claim 2, characterized in that: The first limiting member is an annular limiting ring; The outer diameter of the first limiting member is greater than the inner diameter of the through hole.

4. The liquid dispensing device according to claim 2, characterized in that: The first limiting member and the liquid distributor are an integrated structure.

5. The liquid dispensing device according to claim 1, characterized in that: The inner wall of the liquid distributor is provided with a plurality of spiral grooves.

6. The liquid dispensing device according to claim 2, characterized in that: A second limiting member for limiting the passage of the liquid distributor through the through hole is further provided at the lower portion of the outer wall of the liquid distributor.

7. The liquid dispensing device according to claim 6, characterized in that: The cross section of the second limiting member is a triangular structure, and the thickness of the second limiting member gradually decreases from top to bottom.

8. The liquid dispensing device according to claim 6, characterized in that: A plurality of second limiting members are provided along the circumference of the liquid distributor.

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