Efficient falling film distribution assembly

Abstract

The utility model discloses an efficient falling film distribution assembly which comprises a tube plate, a SiC tube arranged on the tube plate in a penetrating mode and a SiC tube sealing assembly arranged on the SiC tube in a sleeving mode and further comprises a fastening nut, a distribution nut and a film forming internal part tube, a first internal thread is arranged on the inner wall of the upper end of the distribution nut, and a first external thread is arranged on the outer wall of the lower end of the distribution nut. A liquid inlet is formed in the distribution nut in the axial direction of the distribution nut, a second external thread is arranged on the outer wall of the fastening nut, a second internal thread is arranged on the inner wall of the upper end of the fastening nut, a third external thread is arranged on the outer wall of the upper end of the film forming internal part pipe, the fastening nut is in threaded connection with the pipe plate, and the distribution nut is in threaded connection with the film forming internal part pipe. The lower end of the film forming inner part pipe extends into the SiC pipe, the fastening nut is in threaded connection with the distribution nut, and the lower end of the fastening nut is arranged on the SiC pipe in a sleeving mode. The film-forming inner part pipe is arranged, so that the liquid film-forming effect is improved, the film-forming section is shortened, and meanwhile, the liquid entering mode is adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of SiC heat exchangers, and in particular relates to a high-efficiency falling film distribution component. Background Art

[0002] SiC falling film heat exchanger has the advantages of good corrosion resistance, no hydraulic influence, no overheating effect, and high heat transfer efficiency, and is widely used in the chemical industry. However, its use effect is significantly affected by the initial film formation effect. Although there are many improvements in the initial distribution components of the falling film, such as the lateral tangent opening of the liquid inlet, etc., it is limited to the SiC falling film evaporator. The falling film component can only use a PTFE structure, and there are still problems such as a long film formation section and unstable initial film formation. Especially when the liquid inlet fluctuates, the film formation effect fluctuates significantly, which affects the use effect of the heat exchanger. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, the technical solution adopted by the utility model is: a high-efficiency falling film distribution component, including a tube sheet, a SiC tube inserted on the tube sheet and a SiC tube sealing component sleeved on the SiC tube, and also including a fastening nut, a distribution nut and a film-forming internal tube, the upper inner wall of the distribution nut is provided with a first internal thread, the lower outer wall is provided with a first external thread, the distribution nut is provided with a liquid inlet along its axial direction, the outer wall of the fastening nut is provided with a second external thread, the upper inner wall of the fastening nut is provided with a second internal thread, the upper outer wall of the film-forming internal tube is provided with a third external thread, the fastening nut is threadedly connected to the tube sheet through the second external thread, the distribution nut is threadedly connected to the second external thread of the film-forming internal tube through the first internal thread, the lower end of the film-forming internal tube extends into the SiC tube, the fastening nut is threadedly connected to the second external thread of the distribution nut through the second internal thread, and the lower end of the fastening nut is sleeved on the SiC tube.

[0005] The liquid inlet is in a strip shape.

[0006] The upper end surface of the SiC tube sealing assembly is attached to the lower end surface of the fastening nut.

[0007] A tapered section is arranged at the lower part of the film-forming internal tube, and the tapered section is arranged inside the SiC tube.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the utility model is provided with a film-forming internal tube, which improves the liquid film-forming effect and shortens the film-forming section. At the same time, the liquid entry mode is adjusted, and the liquid inlet channel changes automatically according to the liquid feed amount, weakening the influence of the liquid amount fluctuation, thereby improving the use effect of the falling film evaporator / absorber. The liquid inlet channel can be changed and adjusted according to the liquid height, thereby slowing down the change of the inlet liquid state caused by the fluctuation of the liquid feed amount. According to the change of the liquid amount, multiple liquid inlets can be set to achieve a wider range of liquid feed amount changes. The liquid inlet adopts tangential feeding with the internal opening of the distribution nut, and cooperates with the film-forming internal tube to form an annular flow channel at the liquid inlet, ensuring the annular flow of the feed and improving the film-forming effect. The film-forming internal tube adopts the form of a middle opening, which can be used as a gas phase channel to avoid the entrainment of the liquid or the generation of gas during the process to affect the stability of the falling film operation, and can also be used as a gas phase channel during the operation of the absorber. The lower part of the middle opening of the film-forming internal adopts a form inclined to the tube wall side, which can improve the contact effect between the gas and the liquid and improve the absorption effect when used as an absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0011] Figure 3 It is a schematic diagram of the structure of the distribution nut;

[0012] Figure 4 is a schematic diagram of the cross-sectional structure of the distribution nut;

[0013] Figure 5 It is a schematic diagram of the structure of the film-forming internal tube;

[0014] Figure 6 It is a schematic diagram of the cross-sectional structure of the film-forming internal tube;

[0015] Figure 7 It is a structural schematic diagram of a fastening nut;

[0016] Figure 8 It is a schematic diagram of the cross-sectional structure of the fastening nut. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0018] On the contrary, the present application covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present application as defined by the claims. Further, in order to make the public have a better understanding of the present application, some specific details are described in detail in the detailed description of the present application below. Those skilled in the art can fully understand the present application without the description of these details.

[0019] See also Figures 1 to 8 A high-efficiency falling film distribution component, comprising a tube sheet 6, a SiC tube 5 inserted on the tube sheet 6 and a SiC tube sealing component 4 sleeved on the SiC tube 5, characterized in that it also includes a fastening nut 1, a distribution nut 2 and a film-forming internal tube 3, the upper inner wall of the distribution nut 2 is provided with a first internal thread 21, the lower outer wall is provided with a first external thread 23, the distribution nut 2 is provided with a liquid inlet 22 along its axial direction, the outer wall of the fastening nut 1 is provided with a second external thread 12, the upper inner wall of the fastening nut 1 is provided with a A second internal thread 11 is provided, and a third external thread 31 is provided on the outer wall of the upper end of the film-forming internal tube 3. The fastening nut 1 is threadedly connected to the tube sheet 6 through the second external thread 12. The distribution nut 2 is threadedly connected to the second external thread 12 of the film-forming internal tube 3 through the first internal thread 21. The lower end of the film-forming internal tube 3 extends into the SiC tube 5. The fastening nut 1 is threadedly connected to the second external thread 12 of the distribution nut 2 through the second internal thread 11, and the lower end of the fastening nut 1 is sleeved on the SiC tube 5. By adjusting the relative position between the distribution nut 2 and the fastening nut 1, the exposed length of the liquid inlet 22 is adjusted, so that the liquid inlet channel can be adjusted according to the liquid height, thereby slowing down the change in the state of the inlet liquid caused by the fluctuation of the liquid inlet amount. According to the change in the liquid amount, multiple liquid inlets can be set to achieve a wider range of liquid feed amount changes.

[0020] The liquid inlet 22 is in a strip shape.

[0021] The upper end surface of the SiC tube sealing assembly 4 is attached to the lower end surface of the fastening nut 1 .

[0022] The lower part of the film forming inner tube 3 is provided with a tapered section 32, which is arranged in the SiC tube 5. The tapered section is arranged at the lower part of the film forming inner tube, which can effectively guide the liquid to flow toward the tube wall side of the SiC tube, improve the film forming effect, and reduce the film forming section.

[0023] The liquid inlet adopts tangential feeding with the internal opening of the distribution nut 2, and cooperates with the film-forming internal tube 3 to form an annular flow channel at the liquid inlet, thereby ensuring the annular flow of the feed and improving the film-forming effect.

[0024] The film-forming internal tube adopts the form of a middle opening, which can be used as a gas phase channel to avoid liquid entrainment or gas generated during the process affecting the stability of the falling film operation. At the same time, it can be used as a gas phase channel during absorber operation.

[0025] The lower part of the middle opening of the film-forming internal part is inclined toward the tube wall, which can improve the contact effect between gas and liquid and improve the absorption effect when used as an absorber.

[0026] Both the distribution nut 2 and the fastening nut 1 are provided with fastening openings. When the position needs to be adjusted, a tool such as a screwdriver is used to cooperate with the fastening openings to rotate the distribution nut 2 and the fastening nut 1.

[0027] The working principle of the utility model is as follows: liquid enters the SiC tube 5 from the liquid inlet 22 .

Claims

1. A high-efficiency falling film distribution assembly, comprising a tube sheet, a SiC tube inserted through the tube sheet, and a SiC tube sealing assembly sleeved on the SiC tube, characterized in that: It also includes a fastening nut, a distribution nut and a film-forming internal tube. The upper inner wall of the distribution nut is provided with a first internal thread, the lower outer wall is provided with a first external thread, a liquid inlet is opened on the distribution nut along its axial direction, the outer wall of the fastening nut is provided with a second external thread, the upper inner wall of the fastening nut is provided with a second internal thread, the upper outer wall of the film-forming internal tube is provided with a third external thread, the fastening nut is threadedly connected to the tube sheet through the second external thread, the distribution nut is threadedly connected to the second external thread of the film-forming internal tube through the first internal thread, the lower end of the film-forming internal tube extends into the SiC tube, the fastening nut is threadedly connected to the second external thread of the distribution nut through the second internal thread, and the lower end of the fastening nut is sleeved on the SiC tube.

2. A high-efficiency falling film distribution assembly according to claim 1, characterized in that: The liquid inlet is in a strip shape.

3. A high-efficiency falling film distribution assembly according to claim 1, characterized in that: The upper end surface of the SiC tube sealing assembly is attached to the lower end surface of the fastening nut.

4. A high-efficiency falling film distribution assembly according to claim 1, characterized in that: A tapered section is arranged at the lower part of the film-forming internal tube, and the tapered section is arranged inside the SiC tube.

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