Film distributor for horizontal tube falling film evaporator

Abstract

The utility model discloses a film distributor for a horizontal tube falling-film evaporator, which relates to the technical field of film distributors and comprises a falling-film evaporator shell, a liquid distributor is arranged in the falling-film evaporator shell, a tube plate is arranged below the liquid distributor, an integrated falling-film head heat exchange tube is inserted in the tube plate, and the falling-film head heat exchange tube is arranged in the falling-film evaporator shell. The integrated falling film head heat exchange tube comprises a heat exchange tube body, a tooth-shaped notch is formed in one end of the heat exchange tube body, and each notch is provided with a slope surface inclining downwards and a flow guide line rotating downwards. Through the arrangement of the integrated falling film head heat exchange tube, feed liquid spirally moves downwards on the inner wall surface of the falling film head heat exchange tube, and in the process, the feed liquid forms a layer of liquid film with uniform thickness on the inner wall of the falling film head heat exchange tube, so that the feed liquid is boiled in a film shape in the falling film head heat exchange tube, and a better heat exchange evaporation effect is achieved; the heat exchange efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of film distribution equipment technology, specifically a film distribution equipment for horizontal tube falling film evaporators. Background Technology

[0002] In industries such as chemical, pharmaceutical, and food processing, film formation of liquid materials is a crucial technological step. Film formation technology is widely used in processes such as evaporation, concentration, drying, and crystallization. Its core purpose is to uniformly distribute liquid materials on a carrier surface to form a thin film, facilitating subsequent heating, cooling, or chemical reactions. However, traditional film formation equipment suffers from numerous problems in practical applications, including uneven film formation and low efficiency, severely impacting production efficiency and product quality. To address these issues, this invention proposes a film distributor for horizontal tube falling film evaporators. Utility Model Content

[0003] Technical problems to be solved

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a film distributor for a horizontal tube falling film evaporator. By improving the equipment structure, it solves the problems of uneven film formation and low efficiency in the prior art, and improves the uniformity and efficiency of film formation.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a film distributor for a horizontal tube falling film evaporator, comprising a falling film evaporator shell, a liquid distributor disposed inside the falling film evaporator shell, a tube sheet disposed below the liquid distributor, and an integrated falling film head heat exchange tube inserted inside the tube sheet. The integrated falling film head heat exchange tube includes a heat exchange tube body, one end of which is provided with a toothed notch. Each toothed notch has a downward-sloping surface and a downward-rotating guide line. By setting the integrated falling film head heat exchange tube, when the liquid material flows through the liquid distributor from the inlet, it is evenly distributed... Distributed on the tube sheet, when the surface of the liquid feed is higher than the lowest point of the toothed notch on the outer wall of the falling film heat exchanger tube, the liquid will flow along the guide line along the inner wall of the falling film heat exchanger tube. The slope of the falling film heat exchanger tube and the guide line not only cause the liquid to flow downward, but also provide the liquid with the initial rotational force because the guide line is spiral downward. Thus, the liquid moves spirally downward on the inner wall of the falling film heat exchanger tube. During this process, the liquid forms a thin and uniform liquid film on the inner wall of the falling film heat exchanger tube, causing the liquid to boil in a film-like manner inside the falling film heat exchanger tube, achieving a better heat exchange and evaporation effect and greatly improving the heat exchange efficiency.

[0007] Preferably, the lowest point of the toothed notch is 2-3 mm higher than the tube sheet.

[0008] Preferably, the top of the falling film evaporator shell is provided with a feed inlet.

[0009] Preferably, the tube sheet has mounting holes for inserting falling film head heat exchange tubes, and the falling film head heat exchange tubes are inserted into the mounting holes.

[0010] Preferably, the liquid distributor is embedded inside the shell of the falling film evaporator, and the liquid distributor includes a plurality of evenly distributed liquid distribution holes.

[0011] Preferably, the falling film evaporator shell consists of two connected semi-shells.

[0012] Preferably, the tube sheet is embedded inside the shell of the falling film evaporator.

[0013] Beneficial effects:

[0014] Compared with existing technologies, this film distributor for horizontal tube falling film evaporators has the following advantages:

[0015] This invention utilizes an integrated falling film heat exchanger tube. When liquid material flows from the inlet through the distributor, it is evenly distributed on the tube sheet. When the surface of the liquid material is higher than the lowest point of the toothed notch on the outer wall of the falling film heat exchanger tube, the liquid will flow along the guide line along the inner wall of the falling film heat exchanger tube. The slope of the falling film heat exchanger tube and the guide line not only cause the liquid to flow downward, but also provide the liquid with the initial rotational force due to the spiral downward direction of the guide line. Thus, the liquid moves spirally downward on the inner wall of the falling film heat exchanger tube. During this process, a thin and uniform liquid film is formed on the inner wall of the falling film heat exchanger tube, causing the liquid to boil in a film-like manner inside the falling film heat exchanger tube, achieving a better heat exchange and evaporation effect and greatly improving the heat exchange efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a partial structural schematic diagram of the falling film head heat exchange tube of this utility model;

[0019] Figure 3 This is a partial side view of the falling film head heat exchanger tube of this utility model;

[0020] Figure 4 This is a top view of the falling film head heat exchanger tube of this utility model.

[0021] In the picture:

[0022] 1. Falling film evaporator shell; 2. Liquid distributor; 3. Tube sheet; 4. Falling film head heat exchange tube; 5. Feed inlet; 401. Heat exchange tube body; 402. Toothed notch; 403. Slope; 404. Guide line; 301. Mounting hole. Detailed Implementation

[0023] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 As shown, this utility model provides a technical solution: a falling film evaporator shell 1, with a liquid distributor 2 inside the shell 1, and a tube sheet 3 below the liquid distributor 2. An integrated falling film head heat exchange tube 4 is inserted inside the tube sheet 3. The integrated falling film head heat exchange tube 4 includes a heat exchange tube body 401. A bevel 403 is processed at one end of the falling film head heat exchange tube 4. A toothed notch 402 is cut at one end of the falling film head heat exchange tube 4 at a certain angle. After processing, a downward slope 403 and a downward rotating guide line 404 are formed. The lowest point of the toothed notch on the outer wall of the falling film head heat exchange tube 4 is set to be 2-3 mm higher than the tube sheet. By setting the integrated falling film head heat exchange tube 4, when the liquid... After the material flows through the inlet 5 and the distributor 2, it is evenly distributed on the tube sheet 3. When the surface of the liquid material is higher than the lowest point of the toothed notch 402 on the outer wall of the falling film heat exchange tube 4, the liquid material will flow along the guide line along the inner wall of the falling film heat exchange tube 4. The slope 403 of the falling film heat exchange tube 4 and the guide line 404 not only cause the liquid material to flow downward, but also provide the liquid material with the initial rotational force because the guide line 404 is spiral downward. As a result, the liquid material moves spirally downward on the inner wall of the falling film heat exchange tube 4. During this process, the liquid material forms a thin and uniform liquid film on the inner wall of the falling film heat exchange tube 4, causing the liquid material to boil in a film-like manner inside the falling film heat exchange tube 4, achieving a better heat exchange and evaporation effect and greatly improving the heat exchange efficiency.

[0025] Please refer to the following carefully. Figure 1The top of the falling film evaporator shell 1 is provided with a feed inlet 5. The falling film evaporator shell 1 is composed of two upper and lower half shells connected together. The two upper and lower half shells can be separated and are connected together by bolts. The tube sheet 3 is embedded in the inside of the falling film evaporator shell 1. The tube sheet 3 has a mounting hole 301 for inserting the falling film head heat exchange tube 4. The falling film head heat exchange tube 4 is inserted into the mounting hole 301.

[0026] Please refer to the following carefully. Figure 1 The liquid distributor 2 is embedded inside the shell 1 of the falling film evaporator, and the liquid distributor 2 includes a number of evenly distributed liquid distribution holes.

[0027] Working principle: When the liquid material flows through the inlet 5 and passes through the distributor 2, it is evenly distributed on the tube sheet 3. When the surface of the liquid material is higher than the lowest point of the toothed notch 402 on the outer wall of the falling film heat exchange tube 4, the liquid material will flow along the guide line along the inner wall of the falling film heat exchange tube 4. The slope 403 of the falling film heat exchange tube 4 and the guide line 404 not only cause the liquid material to flow downward, but also provide the liquid material with the initial rotational force because the guide line 404 is spiral downward. Thus, the liquid material moves spirally downward on the inner wall of the falling film heat exchange tube 4. During this process, the liquid material forms a thin and uniform liquid film on the inner wall of the falling film heat exchange tube 4, causing the liquid material to boil in a film-like manner inside the falling film heat exchange tube 4, achieving a better heat exchange and evaporation effect and greatly improving the heat exchange efficiency.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A film distributor for a horizontal tube falling film evaporator, comprising a falling film evaporator shell (1), characterized in that: The inside of the falling film evaporator shell (1) is provided with a liquid distributor (2), the lower part of the liquid distributor (2) is provided with a tube sheet (3), the inside of the tube sheet (3) is inserted with an integrated falling film head heat exchange tube (4); The integrated falling film head heat exchange tube (4) comprises a heat exchange tube body (401), one end of the heat exchange tube body (401) is provided with a tooth-shaped notch (402), each tooth-shaped notch (402) is provided with a downward inclined slope (403) and a downward rotating flow line (404).

2. A film distributor for a falling film evaporator with horizontal tubes according to claim 1, characterized in that: The lowest point of the tooth-shaped notch (402) is 2-3mm higher than the tube sheet (3).

3. A film distributor for a falling film evaporator having horizontal tubes as claimed in claim 1, characterized in that: The top of the falling film evaporator shell (1) is provided with a feed inlet (5).

4. A film distributor for a falling film evaporator having horizontal tubes according to claim 1, characterized in that: The tube sheet (3) is provided with a mounting hole (301) for inserting the falling film head heat exchange tube (4), the falling film head heat exchange tube (4) is inserted into the mounting hole (301).

5. A film distributor for use in a falling film evaporator having horizontal tubes as claimed in claim 1, characterized in that: The liquid distributor (2) is embedded and installed in the inside of the falling film evaporator shell (1), and the liquid distributor (2) comprises a plurality of uniformly distributed liquid distribution holes.

6. A film distributor for use in a falling film evaporator having horizontal tubes as defined in claim 1, characterized in that: The falling film evaporator shell (1) is composed of two half shells connected together.

7. A film distributor for use in a falling film evaporator having horizontal tubes as defined in claim 1, characterized in that: The tube sheet (3) is embedded and installed in the inside of the falling film evaporator shell (1).

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