Horizontal shell-and-tube condenser

Abstract

The horizontal shell-and-tube condenser comprises an inner tube shell with the hollow interior, a T-shaped partition plate which divides an inner cavity of the inner tube shell into a flow dividing cavity, a flow converging cavity and a heat exchange cavity is arranged in the inner tube shell, and a plurality of heat exchange tubes are arranged in the heat exchange cavity; a first medium inlet pipe communicating with the flow dividing cavity, a first medium outlet pipe communicating with the flow converging cavity, a second medium inlet pipe communicating with the heat exchange cavity and a second medium outlet pipe communicating with the heat exchange cavity are oppositely arranged outside the inner pipe shell, a plurality of pipe plates are arranged in the heat exchange cavity, and pipe penetrating notches which allow the heat exchange pipes to penetrate in a sliding mode and are in clearance fit with the heat exchange pipes are densely distributed in the pipe plates. A tension spring is hung between one side of the tube plate and the inner wall of the inner tube shell, an arc-shaped elastic arc plate is arranged on the other side of the tube plate, an inserting groove with a T-shaped section is formed in the inner side wall of the inner tube shell, and an air bag filled with expansion gas is clamped between the elastic arc plate and the inner wall of the inner tube shell. The possibility of leakage caused by overall deformation of the condenser due to difficulty in releasing thermal stress of the tube bundle is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange equipment, and in particular to a horizontal shell and tube condenser. Background Art

[0002] The shell and tube condenser consists of a shell and a tube bundle containing many tubes. Heat is exchanged between the cold and hot fluids through the tube wall. It has the advantages of simple structure, low cost, wide flow cross-section, and easy cleaning of scale.

[0003] The shell of a traditional shell and tube condenser is usually equipped with multiple tube sheets for supporting the tube bundle, and the tube sheets and the tube bundle fit very tightly. However, the tube bundle will generate thermal stress under the action of high-temperature fluid, and the tight fit between the tube sheet and the tube bundle will make it difficult to release the thermal stress, causing the entire heat exchanger to deform and leak, which is obviously insufficient. Summary of the invention

[0004] In order to improve the problem that the thermal stress in the tube bundle is difficult to release, resulting in deformation and leakage of the condenser, the present application provides a horizontal shell and tube condenser.

[0005] The horizontal shell and tube condenser provided in the present application adopts the following technical solution: A horizontal shell-and-tube condenser comprises an inner shell-and-tube condenser with a hollow interior, wherein a T-shaped partition is arranged inside the inner shell-and-tube condenser and divides the inner cavity into a flow-dividing cavity, a flow-converging cavity and a heat-exchanging cavity, wherein a plurality of heat-exchanging tubes are arranged in the heat-exchanging cavity, wherein one end of the heat-exchanging tubes extends into the flow-dividing cavity and the other end extends into the flow-converging cavity, and a first medium inlet tube connected to the flow-dividing cavity, a first medium outlet tube connected to the flow-converging cavity, a second medium inlet tube and a second medium outlet tube connected to the heat-exchanging cavity are arranged outside the inner shell-and-tube condenser. A plurality of tube sheets are arranged in the heat exchange cavity, and the tube sheets are densely covered with tube penetration slots for the heat exchange tubes to slide through and to fit with the gaps therethrough. A tension spring is hung between one side of the tube sheet and the inner wall of the inner tube shell, and an arc-shaped elastic arc plate is arranged on the other side. The tension springs on two adjacent tube sheets are arranged back to back, and a T-shaped plug-in slot is opened on the inner side wall of the inner tube shell. Both sides of the elastic arc plate are plug-in fit with the plug-in slot, and an air bag filled with expansion gas is sandwiched between the elastic arc plate and the inner wall of the inner tube shell.

[0006] By adopting the above technical solution, the cold medium flows into the heat exchange cavity from the second medium inlet pipe and realizes heat exchange with the high-temperature gas medium in the heat exchange tube, and the hot medium after heat exchange is discharged from the second medium outlet pipe. The high-temperature gas medium enters the diversion cavity from the first medium inlet pipe, flows through the heat exchange tube and converges into the converging cavity. In this process, the high-temperature gas medium is condensed and discharged from the first medium outlet pipe. In this process, the heat of the high-temperature gas medium dissipates to the entire heat exchange cavity, the temperature in the heat exchange cavity gradually increases, and the volume of the expanding gas increases under the action of high temperature, thereby expanding the airbag, and the airbag pushes the corresponding elastic arc plate to deform, and the corresponding tube plate moves under the cooperation of the corresponding tension spring and the elastic arc plate, and the tube notches on different tube plates tend to move coaxially, and a gap is generated between the heat exchange tube and the tube notch to allow the heat exchange tube to deform and eliminate its own thermal stress, thereby reducing the possibility of heat exchanger deformation and leakage caused by thermal stress.

[0007] Optionally, the tube plate has rotation grooves on the other two sides corresponding to the tension spring and the airbag, and the elastic arc plate is provided with elastic ear plates corresponding to the two rotation grooves one by one, and the elastic ear plates are provided with rotation pins for rotating into the corresponding rotation grooves.

[0008] By adopting the above technical solution, the rotating groove and the rotating pin cooperate to realize the assembly between the elastic arc plate and the tube plate. Since the elastic arc plate is not directly connected to the tube plate, the degree of obstruction of the elastic arc plate by the connection between the elastic arc plate and the tube plate can be reduced when the airbag pushes the elastic arc plate to deform.

[0009] Optionally, the rotation groove is fan-shaped, and when the elastic ear plate is in close contact with the tube plate, the rotation pin just in close contact with the closed side of the rotation groove.

[0010] By adopting the above technical solution, the closed end of the rotating pin and the rotating groove are in close contact, thereby enhancing the tightness of the assembly between the elastic arc plate and the tube plate.

[0011] Optionally, the elastic arc plate is densely covered with air holes.

[0012] By adopting the above technical solution, the air holes facilitate the heat transfer between the inside and outside of the cavity enclosed by the elastic arc plate and the inner wall of the inner tube shell, thereby improving the heat absorption effect of the expanding gas in the airbag.

[0013] Optionally, end plates are arranged at the top and bottom of the elastic arc plate, a support rod is arranged between the two end plates, and the airbag is fixedly sleeved on the support rod.

[0014] By adopting the above technical solution, when the temperature in the heat exchange chamber is not high, the thermal stress generated in the heat exchange tube is small and is not enough to generate a large force on the condenser itself. Therefore, the expansion amount of the expanding gas in the airbag is also small at this time, and will not push the elastic arc plate to deform. Multiple tube sheets cooperate to maintain stable support for the heat exchange tube.

[0015] Optionally, the cross-section of the inner tube shell is rectangular, and the outer sliding sleeve of the inner tube shell is provided with an outer tube shell with a circular cross-section. The inner wall of the outer tube shell is provided with a mounting groove parallel to its length direction, and each circumferential edge of the inner tube shell corresponds to a mounting groove and is plugged into and matched with the mounting groove.

[0016] By adopting the above technical solution, workers can fill the gap between the inner tube shell and the outer tube shell with thermal insulation cotton according to the actual application scenario, so that this application can be used as a heat exchanger, which is conducive to improving applicability.

[0017] Optionally, the plurality of tube sheets are located between the connecting points of the second medium inlet pipe and the second medium outlet pipe and the inner tube shell.

[0018] By adopting the above technical solution, multiple tube sheets cooperate to form a tortuous flow channel in the heat exchange cavity, thereby extending the flow time of the cold medium in the heat exchange cavity and improving the heat exchange effect between the cold medium and the high-temperature gas medium.

[0019] Optionally, each tube plate is divided into a plurality of unit plates and arranged in a row, the tube passing slots are distributed on each unit plate, and two adjacent unit plates are plug-fitted together.

[0020] By adopting the above technical solution, since the heat exchange tube may be bent in an S-shape, the tube sheet is divided into multiple unit sheets, thereby facilitating the assembly between the two.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The cold medium flows into the heat exchange cavity from the second medium inlet pipe and realizes heat exchange with the high-temperature gas medium in the heat exchange tube. The hot medium after heat exchange is discharged from the second medium outlet pipe. The high-temperature gas medium enters the diversion cavity from the first medium inlet pipe, flows through the heat exchange tube and converges into the converging cavity. In this process, the high-temperature gas medium is condensed and discharged from the first medium outlet pipe. In this process, the heat of the high-temperature gas medium dissipates to the entire heat exchange cavity, and the temperature in the heat exchange cavity gradually increases. The volume of the expanding gas increases under the action of high temperature, thereby expanding the airbag. The airbag pushes the corresponding elastic arc plate to deform, and the corresponding tube plate moves under the cooperation of the corresponding tension spring and the elastic arc plate. The tube notches on different tube plates tend to move coaxially, and a gap is generated between the heat exchange tube and the tube notch to allow the heat exchange tube to deform and eliminate its own thermal stress, thereby reducing the possibility of heat exchanger deformation and leakage caused by thermal stress; 2. Workers can fill the gap between the inner tube shell and the outer tube shell with thermal insulation cotton according to the actual application scenario, so that this application can be used as a heat exchanger, which is conducive to improving applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a cross-sectional view of an embodiment of the present application.

[0023] Figure 2 It is a cross-sectional view showing the positional relationship between the tube sheets in the embodiment of the present application.

[0024] Figure 3 It is a cross-sectional view showing the positional relationship between the inner tube shell, the outer tube shell, and the tube sheet in the embodiment of the present application.

[0025] Explanation of the reference numerals: 1. inner tube shell; 101. plug-in slot; 2. diverter chamber; 3. converging chamber; 4. heat exchange chamber; 5. partition; 6. heat exchange tube; 7. first medium inlet tube; 8. first medium outlet tube; 9. second medium inlet tube; 10. second medium outlet tube; 11. tube sheet; 111. tube insertion slot; 112. rotating slot; 12. tension spring; 13. elastic arc plate; 131. air vent; 14. air bag; 15. elastic ear plate; 16. rotating pin; 17. end plate; 18. support rod; 19. outer tube shell; 191. mounting slot. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-3 This application is described in further detail.

[0027] The embodiment of the present application discloses a horizontal shell and tube condenser.

[0028] Reference Figure 1 The horizontal shell and tube condenser comprises an inner shell 1 with a hollow interior and an outer shell 19, wherein the outer shell 19 is slidably sleeved outside the inner shell 1 and bolted thereto. A T-shaped partition 5 is welded inside the inner shell 1, and the partition 5 divides the inner cavity of the inner shell 1 into a diversion cavity 2, a confluence cavity 3 and a heat exchange cavity 4.

[0029] Reference Figure 1 A plurality of heat exchange tubes 6 are arranged in the heat exchange cavity 4, one end of the heat exchange tube 6 extends into the flow-dividing cavity 2, and the other end extends into the flow-collecting cavity 3. A first medium inlet tube 7 connected to the flow-dividing cavity 2 and passing through the outer tube shell 19, and a first medium outlet tube 8 connected to the flow-collecting cavity 3 and passing through the outer tube shell 19 are arranged outside the inner tube shell 1.

[0030] Reference Figure 1 A second medium inlet pipe 9 and two second medium outlet pipes 10 are connected to the position outside the inner tube shell 1 relative to the heat exchange chamber 4. One second medium outlet pipe 10 is connected to the top of the inner tube shell 1, and the other is connected to the bottom of the inner tube shell 1. The second medium inlet pipe 9 and the second medium outlet pipe 10 both pass through the outside of the outer tube shell 19.

[0031] Reference Figure 1 and Figure 2A plurality of tube sheets 11 are arranged in the inner tube shell 1 at a position relative to the heat exchange chamber 4. The plurality of tube sheets 11 are arranged along the length direction of the heat exchange chamber 4. The tube sheets 11 are densely covered with tube penetration notches 111 for the heat exchange tubes 6 to slide through and to fit with the heat exchange tubes 6. The cross-section of the tube penetration notches 111 can be rectangular, circular, elliptical, diamond-shaped, etc.

[0032] Reference Figure 1 and Figure 2 A tension spring 12 is hung between one side of the tube sheet 11 and the inner wall of the inner tube shell 1, and an arc-shaped elastic arc plate 13 is arranged on the other side. The tension springs 12 on two adjacent tube sheets 11 are arranged back to back.

[0033] Reference Figure 1 and Figure 2 A T-shaped plug-in groove 101 is opened on the inner side wall of the inner tube shell 1 corresponding to each elastic arc plate 13, and both sides of the elastic arc plate 13 are plugged into the plug-in groove 101. An air bag 14 is sandwiched between the elastic arc plate 13 and the inner wall of the inner tube shell 1, and the air bag 14 is filled with expansion gas.

[0034] Reference Figure 1 and Figure 2 The cold medium enters the heat exchange chamber 4 from the second medium inlet pipe 9 and is discharged from the second medium outlet pipe 10 after absorbing heat. According to the state of the cold medium after absorbing heat, it can be selected to be discharged from a suitable second medium outlet pipe 10.

[0035] The high-temperature gas medium flows into the diversion chamber 2 from the first medium inlet pipe 7, then flows into the heat exchange tube 6 to realize heat exchange with the cold medium in the heat exchange chamber 4, condenses into liquid, then flows into the confluence chamber 3, and finally flows out from the first medium outlet pipe 8.

[0036] This application is particularly suitable for seawater desalination systems, where the high-temperature gas medium is high-temperature water vapor, which is converted into liquid fresh water after condensation. Since seawater has a certain degree of corrosiveness, when the working conditions are more severe, the corresponding heat exchange tube 6 can be made of different materials according to actual conditions.

[0037] Reference Figure 1 and Figure 2 As the heat exchange proceeds, the temperature in the heat exchange chamber 4 gradually increases, and the heat absorption volume of the expanded gas in the airbag 14 increases, thereby expanding the airbag 14, and the airbag 14 pushes the elastic arc plate 13 to deform.

[0038] Under the cooperation of the airbag 14 and the tension spring 12, the corresponding tube penetration slots 111 on different tube sheets 11 move in a coaxial direction, and a gap is gradually generated between the heat exchange tube 6 and the tube penetration slot 111, which can provide space for the deformation of the heat exchange tube 6 under the action of thermal stress.

[0039] The plurality of tube sheets 11 cooperate to form a space in the tube penetration slot 111 for thermal stress deformation of the heat exchange tube 6 , thereby reducing the possibility that the thermal stress in the heat exchange tube 6 has nowhere to be released and acts on the condenser as a whole, causing the overall deformation of the condenser and leakage.

[0040] Reference Figure 1 and Figure 2 The elastic arc plate 13 is densely covered with air holes 131, which make the cavity formed between the elastic arc plate 13 and the inner wall of the inner tube shell 1 unobstructed inside and outside, thereby facilitating the expansion gas in the airbag 14 to quickly absorb heat from the high-temperature gas medium in the heat exchange chamber 4.

[0041] Reference Figure 1 , Figure 2 and Figure 3 The other two sides of the tube sheet 11 corresponding to the tension spring 12 and the air bag 14 are provided with rotation grooves 112 with a fan-shaped cross section, and the elastic arc plate 13 is integrally formed with elastic ear plates 15 corresponding to the two rotation grooves 112 one by one, and the elastic ear plates 15 are welded with rotation pins 16 for rotating into the rotation grooves 112.

[0042] During installation, the worker first prys the two elastic ear plates 15 , then moves the tube sheet 11 between the two elastic ear plates 15 , and then releases the elastic ear plates 15 . The elastic ear plates 15 automatically restore their deformation to fit tightly against the tube sheet 11 , and the rotation pin 16 automatically rotates into the rotation groove 112 .

[0043] When the elastic ear plate 15 is in close contact with the tube sheet 11, the rotation pin 16 is just in close contact with the closed end of the rotation groove 112. After the elastic arc plate 13 is assembled with the tube sheet 11 through the elastic ear plate 15 and the rotation pin 16, the structure between the elastic arc plate 13 and the tube sheet 11 is stable and has strong fastness.

[0044] And through the cooperation of the rotating groove 112 and the rotating pin 16, the elastic arc plate 13 is not directly connected to the tube sheet 11, so as to reduce the degree of obstruction of the elastic arc plate 13 by the connection between the elastic arc plate 13 and the tube sheet 11 when the airbag 14 pushes the elastic arc plate 13 to deform. Reference Figure 1 , Figure 2 and Figure 3 The top and bottom of the elastic arc plate 13 are integrally formed with end plates 17 , a support rod 18 is welded between the two end plates 17 , and the airbag 14 is fixedly sleeved on the support rod 18 .

[0045] When the temperature in the heat exchange chamber 4 is not high, the thermal stress generated on the heat exchange tube 6 is small and is not enough to generate a large force on the condenser itself. Therefore, the expansion amount of the expanding gas in the airbag 14 is also small at this time, and will not push the elastic arc plate 13 to deform. Multiple tube sheets 11 cooperate to maintain stable support for the heat exchange tube 6.

[0046] In order to improve the heat exchange effect of the heat exchange tube 6, the heat exchange tube 6 is usually U-shaped or S-shaped, and the bending part of the heat exchange tube 6 makes it difficult to install it on the whole plate. Therefore, in the present application, each tube plate 11 is divided into multiple unit plates and the multiple unit plates are arranged in rows, and the tube slots 111 are distributed on each unit plate, and the adjacent unit plates are plugged in and matched.

[0047] Reference Figure 1 , Figure 2 and Figure 3 The multiple tube sheets 11 are all located between the connecting point between the second medium inlet pipe 9 and the second medium outlet pipe 10 and the inner tube shell 1. The multiple tube sheets 11 cooperate to form an S-shaped curved flow channel in the heat exchange chamber 4, thereby extending the flow time of the cold medium in the heat exchange chamber 4, improving the heat exchange effect between the heat exchange chamber 4 and the medium in the heat exchange tube 6, and having high energy saving performance.

[0048] Reference Figure 1 , Figure 2 and Figure 3 , Figure 2 and Figure 3 , when used, the present application is not limited to the high temperature medium must flow in the heat exchange tube 6, on the contrary, the high temperature medium can flow in the heat exchange cavity 4. For example, when applied to heat recovery of high-temperature exhaust gas, the high-temperature exhaust gas can flow in from the second medium inlet pipe 9 and flow out from the second medium outlet pipe 10, while the cold medium flows through the heat exchange tube 6, thereby realizing heat transfer from the heat exchange chamber 4 to the heat exchange tube 6. It can be seen that the present application can exchange the flow paths of the cold and hot media, thereby greatly improving the scope of application of the present application.

[0049] Reference Figure 1 , Figure 2 and Figure 3 The cross section of the inner tube shell 1 is rectangular, and a plurality of mounting grooves 191 parallel to the length direction thereof are opened on the inner wall of the outer tube shell 19. Each circumferential corner of the inner tube shell 1 corresponds to a mounting groove 191 and is plugged in with the mounting groove 191.

[0050] When the present application is used for the above-mentioned high-temperature exhaust gas heat recovery, the gap between the inner tube shell 1 and the outer tube shell 19 can be filled with thermal insulation cotton to improve the heat recovery effect. When the application site changes, the thermal insulation cotton can be taken out.

[0051] The implementation principle of a horizontal shell and tube condenser in the embodiment of the present application is: The high-temperature gas medium flows into the diversion chamber 2 from the first medium inlet pipe 7, then flows into the heat exchange tube 6 to realize heat exchange with the cold medium in the heat exchange chamber 4, condenses into liquid, then flows into the confluence chamber 3, and finally flows out from the first medium outlet pipe 8.

[0052] As the heat exchange proceeds, the temperature in the heat exchange chamber 4 gradually increases, and the expanded gas in the airbag 14 absorbs heat and increases in volume, thereby expanding the airbag 14 , and the airbag 14 pushes the elastic arc plate 13 to deform.

[0053] Under the cooperation of the airbag 14 and the tension spring 12, the corresponding tube penetration slots 111 on different tube sheets 11 move in a coaxial direction, and a gap is gradually generated between the heat exchange tube 6 and the tube penetration slot 111, which can provide space for the deformation of the heat exchange tube 6 under the action of thermal stress.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A horizontal shell and tube condenser, comprising an inner tube shell (1) with a hollow interior, wherein a T-shaped partition (5) is arranged inside the inner tube shell (1) and divides the inner cavity thereof into a flow-dividing cavity (2), a flow-converging cavity (3) and a heat-exchanging cavity (4), wherein a plurality of heat-exchanging tubes (6) are arranged in the heat-exchanging cavity (4), wherein one end of the heat-exchanging tube (6) extends into the flow-dividing cavity (2) and the other end extends into the flow-converging cavity (3), and a first medium inlet tube (7) connected to the flow-dividing cavity (2), a first medium outlet tube (8) connected to the flow-converging cavity (3), a second medium inlet tube (9) connected to the heat-exchanging cavity (4) and a second medium outlet tube (10) are arranged opposite to each other outside the inner tube shell (1), characterized in that: A plurality of tube sheets (11) are arranged in the heat exchange cavity (4), and the tube sheets (11) are densely covered with tube penetration notches (111) for the heat exchange tubes (6) to slide through and to fit with the tube sheets in a clearance. A tension spring (12) is hung between one side of the tube sheet (11) and the inner wall of the inner tube shell (1), and an arc-shaped elastic arc plate (13) is arranged on the other side. The tension springs (12) on two adjacent tube sheets (11) are arranged back to back. A T-shaped plug-in groove (101) is opened on the inner side wall of the inner tube shell (1), and both sides of the elastic arc plate (13) are plug-fitted with the plug-in groove (101). An air bag (14) filled with expansion gas is sandwiched between the elastic arc plate (13) and the inner wall of the inner tube shell (1).

2. The horizontal shell and tube condenser according to claim 1, characterized in that: The tube plate (11) is provided with rotation grooves (112) on the other two sides corresponding to the tension spring (12) and the air bag (14); the elastic arc plate (13) is provided with elastic ear plates (15) corresponding to the two rotation grooves (112) one by one; and the elastic ear plates (15) are provided with rotation pins (16) for rotating into the corresponding rotation grooves (112).

3. The horizontal shell and tube condenser according to claim 1, characterized in that: The rotating groove (112) is fan-shaped, and when the elastic ear plate (15) is in close contact with the tube plate (11), the rotating pin (16) is just in close contact with the closed side of the rotating groove (112).

4. The horizontal shell and tube condenser according to claim 1, characterized in that: The elastic arc plate (13) is densely covered with air holes (131).

5. The horizontal shell and tube condenser according to claim 1, characterized in that: End plates (17) are arranged at the top and bottom of the elastic arc plate (13), a support rod (18) is arranged between the two end plates (17), and the airbag (14) is fixedly sleeved on the support rod (18).

6. The horizontal shell and tube condenser according to claim 1, characterized in that: The cross section of the inner tube shell (1) is rectangular, and an outer tube shell (19) with a circular cross section is provided on the outer sliding sleeve of the inner tube shell (1). The inner wall of the outer tube shell (19) is provided with a mounting groove (191) parallel to the length direction thereof, and each circumferential corner of the inner tube shell (1) corresponds to a mounting groove (191) and is plugged into and matched with the mounting groove.

7. The horizontal shell and tube condenser according to claim 1, characterized in that: The plurality of tube sheets (11) are located between the second medium inlet pipe (9) and the second medium outlet pipe (10) and the connection point with the inner tube shell (1).

8. The horizontal shell and tube condenser according to claim 1, characterized in that: Each tube sheet (11) is divided into a plurality of unit sheets arranged in a row, the tube passing slots (111) are distributed on each unit sheet, and two adjacent unit sheets are plug-fitted.

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