Horizontal shell-and-tube heat exchanger

Abstract

The utility model discloses a horizontal shell-and-tube heat exchanger. Comprising a horizontal barrel, a tube box communicated with one end of the barrel, a tube plate arranged between the barrel and the tube box in an abutting mode, a partition plate arranged in the tube box, a heating medium inlet, a heating medium outlet, a refrigerant inlet, a refrigerant outlet and a U-shaped heat exchange tube, wherein the heating medium inlet and the heating medium outlet are formed in the tube box and located in the two sides of the partition plate, the refrigerant inlet and the refrigerant outlet are formed in the barrel, and the U-shaped heat exchange tube is arranged in a shell. Two ends of the U-shaped heat exchange tube are respectively communicated with the tube plate and are respectively positioned on two sides of the partition plate; the partition plate comprises a plate body used for bearing the heating medium and a plurality of guide protruding strips arranged on the plate body in a protruding mode, every two guide protruding strips are arranged at intervals, the guide protruding strips are located on the side, facing the heating medium inlet, of the plate body, the arrangement direction of the guide protruding strips is perpendicular to the direction from the heating medium inlet to the tube plate, and one ends of the guide protruding strips extend to abut against the tube plate. According to the horizontal shell-and-tube heat exchanger disclosed by the utility model, when a heating medium with higher viscosity is introduced, higher heat exchange efficiency can still be ensured.

Description

Technical Field

[0001] This utility model relates to a horizontal shell-and-tube heat exchanger. Background Technology

[0002] In existing shell-and-tube heat exchangers, the heat exchange tube assembly in the shell is generally composed of multiple parallel heat exchange tubes. The heat medium flows through the heat exchange tubes and exchanges heat with the refrigerant in the shell. When the heat medium introduced into the heat exchange tubes is a fluid with high viscosity, its poor fluidity and uneven flow will lead to low heat exchange efficiency between it and the refrigerant outside the heat exchange tubes. Utility Model Content

[0003] The purpose of this invention is to provide a horizontal shell-and-tube heat exchanger that can still maintain high heat exchange efficiency when a high-viscosity heat medium is introduced.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A horizontal shell-and-tube heat exchanger includes a horizontal shell, a tube box connected to one end of the shell, a tube sheet abutting between the shell and the tube box, a partition plate disposed in the tube box, a heat medium inlet and a heat medium outlet disposed on the tube box and located on both sides of the partition plate, and a cold medium inlet and a cold medium outlet disposed on the shell. The horizontal shell-and-tube heat exchanger also includes a U-shaped heat exchange tube disposed in the shell, with both ends of the U-shaped heat exchange tube respectively connected to the tube sheet and located on both sides of the partition plate.

[0006] The partition includes a plate body for carrying heat medium and multiple guide strips protruding from the plate body and arranged in pairs at intervals. The guide strips are located on the side of the plate body facing the heat medium inlet. The arrangement direction of the guide strips is perpendicular to the direction from the heat medium inlet to the tube sheet. One end of the guide strip extends to abut against the tube sheet.

[0007] Preferably, the guide ridge is a wavy line, and all the guide ridges have the same shape, with their crests and troughs aligned along the arrangement direction of the guide ridges.

[0008] Preferably, the guide ridge is a straight line, and the extensions of two adjacent guide ridges intersect.

[0009] More preferably, the guide protrusions are counted along their arrangement direction, with odd-numbered guide protrusions being parallel to each other and even-numbered guide protrusions being parallel to each other.

[0010] Preferably, the heat medium inlet is located directly above the partition.

[0011] More preferably, the upper surface of the plate body is inclined downward along the extension direction of the guide ridge.

[0012] Preferably, the horizontal shell-and-tube heat exchanger further includes an electric heating wire disposed in the wall of the U-shaped heat exchange tube and a power source disposed outside the shell and electrically connected to the electric heating wire.

[0013] Preferably, the horizontal shell-and-tube heat exchanger further includes fins disposed on the outer side of the wall of the U-shaped heat exchange tube.

[0014] Preferably, the horizontal shell-and-tube heat exchanger further includes baffles disposed in the shell, and there are multiple baffles arranged alternately in sequence along the direction from the refrigerant inlet to the refrigerant outlet.

[0015] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The horizontal shell-and-tube heat exchanger of this utility model has a guide ridge extending to the tube sheet on the side of the partition plate facing the heat medium inlet. The direction of the guide ridge is perpendicular to the direction from the heat medium inlet to the tube sheet. Through this setting, the guide ridge can not only guide the flow direction of the fluid and make it smoothly enter the heat exchange tube to ensure heat exchange efficiency, but also break the thermal boundary layer of the fluid and reduce the heat transfer resistance, thereby further improving the heat exchange efficiency. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the structure of a horizontal shell-and-tube heat exchanger according to a specific embodiment of the present invention;

[0017] Appendix Figure 2 This is a cross-sectional structural schematic diagram of a horizontal shell-and-tube heat exchanger according to a specific embodiment of the present invention;

[0018] Appendix Figure 3 This is an enlarged schematic diagram of the U-shaped heat exchange tube.

[0019] Appendix Figure 4 This is an enlarged structural schematic diagram of the partition in Example 1;

[0020] Appendix Figure 5 This is an enlarged structural schematic diagram of the partition in Example 2.

[0021] The components include: 1. cylinder; 11. refrigerant inlet; 12. refrigerant outlet; 2. pipe box; 21.

[0022] 22. Heat medium inlet; 3. Heat medium outlet; 4. Tube sheet; 5. Baffle plate; 6. Plate body; 7. Guide rib; 8. U-shaped heat exchange tube; 9. Electric heating wire; 10. Fin; 11. Baffle plate. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to specific embodiments and accompanying drawings.

[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0025] In the description of the embodiments of this utility model, it should be understood that the terms "length", "inner", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model.

[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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0030] See Figure 1-2 As shown, Embodiment 1 provides a horizontal shell-and-tube heat exchanger, including a horizontal cylindrical body 1, a tube box 2 connected to one end of the body 1, a tube sheet 3 abutting between the body 1 and the tube box 2, a partition 4 horizontally arranged in the tube box 2, a heat medium inlet 21 and a heat medium outlet 22 opened on the tube box 2 and located on opposite sides of the partition 4, and a cold medium inlet 11 and a cold medium outlet 12 opened on the body 1, wherein the cold medium inlet 11 is close to the tube sheet 3 and located above, and the cold medium outlet 12 is far away from the tube sheet 3 and located below.

[0031] The horizontal shell-and-tube heat exchanger also includes U-shaped heat exchange tubes 5 disposed within the shell. Both ends of the U-shaped heat exchange tubes 5 are connected to the tube sheet 3 and located on opposite sides of the partition plate 4. One end of the U-shaped heat exchange tubes 5 is used for feeding, and the other end is used for discharging. See also... Figure 2 As shown, in this embodiment, there are multiple U-shaped heat exchange tubes 5.

[0032] The aforementioned baffle 4 includes a plate body 41 for carrying the heat medium and multiple guide strips 42 protruding from the plate body 41 and arranged in pairs at intervals. The guide strips 42 are located on the side of the plate body 41 facing the heat medium inlet 21. The arrangement direction of the guide strips 42 is perpendicular to the direction from the heat medium inlet 21 to the tube sheet 3. One end of the guide strips 42 extends to abut against the tube sheet 3.

[0033] In this embodiment, the partition 4 is arranged in the left-right direction, the heat medium inlet 21 is located directly above the partition 4, and the heat medium outlet 22 is located below the partition 4; one end of the U-shaped heat exchange tube 5 is located above the partition 4, and the other end of the U-shaped heat exchange tube 5 is located below the partition 4.

[0034] See Figure 4 As shown, in this embodiment, the guide ridge 42 is a wavy line, and all the guide ridges 42 have the same shape. The peak and trough positions of the ridges are aligned along the arrangement direction of the guide ridges 42.

[0035] By setting the wavy guide ribs 42, the flow direction of the fluid can be changed periodically, increasing the turbulence of the fluid, further disrupting the thermal boundary layer of the fluid, enhancing the transfer of heat from the interior of the fluid to the heat exchange surface, thereby improving the heat exchange efficiency.

[0036] In this embodiment, the upper surface of the plate body 41 is inclined downward along the extension direction of the guide protrusion 42. This structure can work with the guide protrusion 42 to better guide the fluid.

[0037] The horizontal shell-and-tube heat exchanger also includes fins 7 disposed on the outer side of the U-shaped heat exchange tube 5. By adding fins 7, the heat exchange area can be increased and heat exchange enhanced, further improving heat exchange efficiency. See also Figure 3 As shown, in this embodiment, the fins 7 are also U-shaped, and the U-shaped fins 7 are always connected to the U-shaped heat exchange tube 5 along its direction.

[0038] The horizontal shell-and-tube heat exchanger also includes an electric heating wire 6 installed in the wall of the U-shaped heat exchange tube 5, and a power supply (not shown in the figure) located outside the shell 1 and electrically connected to the electric heating wire 6. During the start-up phase, directly introducing high-temperature fluid can cause thermal shock to the heat exchange tube. By installing the electric heating wire 6, the fluid can be heated after entering the heat exchange tube, reducing the risk of thermal shock, while ensuring the heating effect on the refrigerant in the shell 1.

[0039] The horizontal shell-and-tube heat exchanger also includes baffles 8 disposed in the shell 1. There are multiple baffles 8, arranged along the direction from the refrigerant inlet 11 to the refrigerant outlet 12 (i.e., Figure 2 The baffles 8 are arranged alternately from left to right. One part of the baffles 8 is connected to the upper side of the cylinder 1 and is spaced apart from the lower side of the cylinder 1, while the other part of the baffles 8 is connected to the lower side of the cylinder 1 and is spaced apart from the upper side of the cylinder 1. This structure allows the refrigerant entering from the refrigerant inlet 11 to move along an S-shaped curve in the cylinder 1, thereby improving the heat exchange time and heat exchange effect.

[0040] Example 2 provides a horizontal shell-and-tube heat exchanger. The main difference between Example 2 and Example 1 is: See [link to example]. Figure 5 As shown, the guide ridge 42 is a straight line, and the extensions of two adjacent guide ridges 42 intersect.

[0041] In this embodiment, the guide protrusions 42 are counted along their arrangement direction. The guide protrusions 42 of odd number are parallel to each other, and the guide protrusions 42 of even number are parallel to each other.

[0042] This setting can also change the flow direction of the fluid, increase fluid disturbance, further disrupt the thermal boundary layer of the fluid, enhance the transfer of heat from the fluid interior to the heat exchange surface, and thus improve heat exchange efficiency.

[0043] The working process of this embodiment is described in detail below:

[0044] Hot fluid is introduced through heat medium inlet 21, and cold fluid is introduced through cold medium inlet 11. The hot fluid first falls onto the partition 4 and, after being guided and disturbed by the guide protrusion 42, enters the upper opening of the U-shaped heat exchange tube 5. Finally, it flows out through the lower opening of the U-shaped heat exchange tube 5 and exits through the heat medium outlet 22. During the process of the hot fluid passing through the U-shaped heat exchange tube 5, the hot fluid heats up the cold fluid in the cylinder 1. The heated cold fluid then flows out through the cold medium outlet 12.

[0045] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A horizontal shell-and-tube heat exchanger, comprising a horizontal shell, a tube box connected to one end of the shell, a tube sheet abutting between the shell and the tube box, a partition plate disposed in the tube box, a heat medium inlet and a heat medium outlet disposed on the tube box and located on both sides of the partition plate, and a coolant inlet and a coolant outlet disposed on the shell, characterized in that: The horizontal shell-and-tube heat exchanger also includes a U-shaped heat exchange tube disposed in the shell, with both ends of the U-shaped heat exchange tube connected to the tube sheet and located on both sides of the partition plate. The partition includes a plate body for carrying heat medium and multiple guide strips protruding from the plate body and arranged in pairs at intervals. The guide strips are located on the side of the plate body facing the heat medium inlet. The arrangement direction of the guide strips is perpendicular to the direction from the heat medium inlet to the tube sheet. One end of the guide strip extends to abut against the tube sheet.

2. The horizontal shell-and-tube heat exchanger according to claim 1, characterized in that: The guide ridges are wavy lines, and all the guide ridges have the same shape. The peak and trough positions of the ridges are aligned along the arrangement direction of the guide ridges.

3. The horizontal shell-and-tube heat exchanger according to claim 1, characterized in that: The guide ridge is a straight line, and the extensions of two adjacent guide ridges intersect.

4. The horizontal shell-and-tube heat exchanger according to claim 3, characterized in that: Counting along the arrangement direction of the guide ridges, the guide ridges with an odd number of ridges are parallel to each other, and the guide ridges with an even number of ridges are parallel to each other.

5. The horizontal shell-and-tube heat exchanger according to claim 1, characterized in that: The heat medium inlet is located directly above the partition.

6. The horizontal shell-and-tube heat exchanger according to claim 5, characterized in that: The upper surface of the plate body is inclined downward along the extension direction of the guide ridge.

7. The horizontal shell-and-tube heat exchanger according to claim 1, characterized in that: The horizontal shell-and-tube heat exchanger also includes an electric heating wire disposed in the wall of the U-shaped heat exchange tube and a power source disposed outside the shell and electrically connected to the electric heating wire.

8. The horizontal shell-and-tube heat exchanger according to claim 1, characterized in that: The horizontal shell-and-tube heat exchanger also includes fins disposed on the outer side of the wall of the U-shaped heat exchange tube.

9. The horizontal shell-and-tube heat exchanger according to claim 1, characterized in that: The horizontal shell-and-tube heat exchanger also includes baffles disposed in the shell, and there are multiple baffles arranged alternately in sequence along the direction from the refrigerant inlet to the refrigerant outlet.

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