Partitioned shell-and-tube heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a partitioned shell-and-tube heat exchanger. According to the technical scheme, the heat exchanger comprises a shell and a tube bundle assembly installed in the shell, the two ends of the tube bundle assembly are fixed in the shell through tube plates, the tube bundle assembly comprises an arc-shaped large channel tube and a plurality of small channel tubes which are distributed from top to bottom, and a high-temperature cold fluid area is formed in the shell where the arc-shaped large channel tube is located. A low-temperature cold fluid area is formed in the shell where the small channel pipe is located. According to the utility model, cold fluid is prevented from carrying out cold-heat exchange in the shell, the cold fluid is divided into relatively high-temperature cold fluid and relatively low-temperature cold fluid, the heat exchange efficiency is prevented from being reduced, and the cold fluid can keep a heat exchange level for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a partitioned shell and tube heat exchanger. Background Art

[0002] A shell-and-tube heat exchanger is a type of heat exchange equipment widely used in various industrial processes. It primarily transfers heat between two fluids, one flowing inside a tube and the other flowing within a shell. Existing shell-and-tube heat exchangers, when in use, experience a change in density as the refrigerant's temperature rises. This causes the higher-temperature refrigerant to rise, and as it rises, it comes into contact with the cooler refrigerant, reducing heat exchange efficiency. Utility Model Content

[0003] The purpose of the utility model is to address the problems existing in the background technology and to propose a partitioned shell and tube heat exchanger.

[0004] The technical solution of the present invention is: a partitioned shell and tube heat exchanger, comprising a shell and a tube bundle assembly installed in the shell, wherein both ends of the tube bundle assembly are fixed in the shell by tube sheets, and the tube bundle assembly comprises an arc-shaped large channel tube and a plurality of small channel tubes distributed from top to bottom, wherein a higher temperature cold fluid zone is formed in the shell where the arc-shaped large channel tube is located, and a lower temperature cold fluid zone is formed in the shell where the small channel tube is located.

[0005] Preferably, the large arc-shaped channel tube is connected to an input port, the connecting box is connected to an input port passing through the shell, and the plurality of small channel tubes are connected to the same connecting box, which is connected to an outlet passing through the shell.

[0006] Preferably, the surface of the arc-shaped large channel tube is an arc-shaped fluid channel.

[0007] Preferably, a plurality of tapered tubes are formed at the end of the arc-shaped large channel tube, and the tapered tubes are connected to the small channel tubes.

[0008] Preferably, the arc-shaped large channel tube and the plurality of small channel tubes are provided with a plurality of staggered upper baffles and lower baffles.

[0009] Preferably, both sides of the shell are fixed with and connected to a pipe box, and the pipe box includes a cold fluid flange.

[0010] Compared with the existing technology, the beneficial effect of the present invention is that a higher temperature cold fluid zone is formed in the shell where the large curved channel tube is located, and a lower temperature cold fluid zone is formed in the shell where the small channel tube is located, so that the temperature of the cold fluid in the small channel tube is lower than that in the large curved channel tube, ensuring that the cold fluid there will not rise, thereby avoiding the cold fluid itself from performing heat exchange in the shell, and dividing it into a higher temperature cold fluid and a lower temperature cold fluid, avoiding the decrease in heat exchange efficiency, and enabling it to maintain a heat exchange level for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural schematic diagram of a partitioned shell and tube heat exchanger proposed by the present utility model;

[0012] Figure 2 This is a structural schematic diagram of a partitioned shell and tube heat exchanger tube bundle assembly proposed by the utility model;

[0013] Figure 3 This is a schematic diagram of the main cross-sectional structure of a partitioned shell and tube heat exchanger proposed by the present invention;

[0014] Figure 4 This is a structural schematic diagram of the tapered tubes of a partitioned shell and tube heat exchanger proposed by the utility model.

[0015] Figure numerals: 1. Shell; 2. Tube bundle assembly; 3. Tube box; 4. Inlet; 5. Outlet; 6. Connecting box; 7. Cold fluid flange; 21. Arc-shaped large channel tube; 22. Small channel tube; 23. Arc-shaped fluid channel; 24. Upper deflector; 25. Lower deflector; 26. Conical tube. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Refer to the attached Figure 1-Figure 4 A partitioned shell and tube heat exchanger includes a shell 1 and a tube bundle assembly 2 installed in the shell 1. The two ends of the tube bundle assembly 2 are fixed in the shell 1 through tube sheets. The tube bundle assembly 2 includes an arc-shaped large channel tube 21 and a plurality of small channel tubes 22 distributed from top to bottom. A higher temperature cold fluid zone is formed in the shell 1 where the arc-shaped large channel tube 21 is located, and a lower temperature cold fluid zone is formed in the shell 1 where the small channel tube 22 is located.

[0018] The cold fluid heated in the shell 1 will rise due to density changes, and the cold fluid with lower temperature will fall. When in use, the hot fluid will first enter the arc-shaped large channel tube 21 and perform heat exchange first. The temperature of the cold fluid there will rise first, and this place is just above, so the heated cold fluid will remain there. After the hot fluid passes through the arc-shaped large channel tube 21 and undergoes heat exchange, it flows into the small channel tube 22. Because it has cooled down, the temperature of the cold fluid there does not rise as much as that at the arc-shaped large channel tube 21. Therefore, the temperature of the cold fluid at the small channel tube 22 is lower than that at the arc-shaped large channel tube 21, ensuring that the cold fluid there will not rise. This avoids the cold fluid itself from performing heat and cold exchange in the shell 1, and divides it into higher temperature cold fluid and lower temperature cold fluid, avoiding the decline in heat exchange efficiency, so that it can maintain a heat exchange level for a long time.

[0019] Specifically, the arc-shaped large channel tube 21 is connected to the input port 4 , the connecting box 6 is connected to the input port 4 penetrating the shell 1 , and the multiple small channel tubes 22 are connected to the same connecting box 6 , which is connected to the discharge port 5 penetrating the shell 1 .

[0020] The hot fluid is input into the connecting box 6 at this location through the input port 4 , then flows into the arc-shaped large channel tube 21 , flows into the small channel tube 22 after heat exchange, and finally is discharged from the discharge port 5 .

[0021] Specifically, the surface of the large arc-shaped channel tube 21 is an arc-shaped fluid channel 23. The setting of the arc-shaped fluid channel 23 forms a guide for the cold fluid and maximizes the contact area with the cold fluid, thereby improving the heat exchange rate of the large arc-shaped channel tube 21, so that the temperature of the cold fluid there is significantly higher than that of the small channel tube 22, and the small channel tube 22 is a traditional tube bundle design.

[0022] In this embodiment, a plurality of tapered tubes 26 are formed at the end of the arc-shaped large channel tube 21 , and the tapered tubes 26 are connected to the small channel tubes 22 , thus ensuring smooth circulation of the hot fluid.

[0023] It should also be noted that a plurality of staggered upper baffles 24 and lower baffles 25 are provided on the arc-shaped large channel tube 21 and the plurality of small channel tubes 22 .

[0024] Both sides of the shell 1 are fixed and connected with a pipe box 3, which includes a cold fluid flange 7. The cold fluid is input into the pipe box 3 through the cold fluid flange 7, then flows into the shell 1, and finally discharged from the pipe box 3 on the other side.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0027] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A partitioned shell and tube heat exchanger, characterized in that: The invention comprises a shell (1) and a tube bundle assembly (2) installed in the shell (1), wherein both ends of the tube bundle assembly (2) are fixed in the shell (1) through tube sheets, and the tube bundle assembly (2) comprises an arc-shaped large channel tube (21) and a plurality of small channel tubes (22) distributed from top to bottom, wherein a relatively high temperature cold fluid zone is formed in the shell (1) where the arc-shaped large channel tube (21) is located, and a relatively low temperature cold fluid zone is formed in the shell (1) where the small channel tube (22) is located; a connecting box (6) is provided inside the shell (1), wherein the ... The connecting box (6) is connected to the input port (4) passing through the shell (1); the plurality of small channel tubes (22) are connected to the same connecting box (6); the arc-shaped large channel tube (21) is connected to the input port (4); and the connecting box (6) is connected to the discharge port (5) passing through the shell (1); the surface of the arc-shaped large channel tube (21) is an arc-shaped fluid channel (23); and the end of the arc-shaped large channel tube (21) forms a plurality of tapered tubes (26), and the tapered tubes (26) are connected to the small channel tubes (22).

2. A zoned shell and tube heat exchanger according to claim 1, characterized in that: The arc-shaped large channel tube (21) and the plurality of small channel tubes (22) are provided with a plurality of staggered upper baffles (24) and lower baffles (25).

3. The partitioned shell and tube heat exchanger according to claim 1, characterized in that: Both sides of the shell (1) are fixed with and connected to a pipe box (3), and the pipe box (3) includes a cold fluid flange (7).

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