A heat exchanger resistant to high temperature corrosion

Abstract

This utility model relates to the field of heat exchanger technology and discloses a high-temperature corrosion resistant heat exchanger, comprising: a shell body with a shell-side inlet and a shell-side outlet; a first tube sheet located at the first end of the shell body; a first end cap with a tube-side inlet; a second tube sheet located at the second end of the shell body; a second end cap with a tube-side outlet; a circulation plate located inside the shell body near its first end, the circulation plate forming a cooling channel with the shell body and / or the first tube sheet; and a refrigerant conduit, the first end of which is adapted to receive refrigerant, and the second end of which is connected to the cooling channel. This utility model, by setting a circulation plate inside the shell body near its first end, the circulation plate forming a cooling channel with the shell body and / or the first tube sheet, the first end of the refrigerant conduit being adapted to receive refrigerant, and the second end of the refrigerant conduit being connected to the cooling channel, allows the refrigerant to enter the cooling channel and cool the connection area between the first tube sheet and the shell body, thus preventing shell deformation.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a heat exchanger resistant to high-temperature corrosion. Background Technology

[0002] A heat exchanger consists of a tube side and a shell side. When the medium on the tube side is high-temperature, the inlet and outlet temperatures are approximately 750℃ / 434℃, while the medium on the shell side is low-temperature, with inlet and outlet temperatures around 246℃ / 600℃. In conventional designs, the tube sheet temperature at the inlet of the high-temperature medium on the tube side is relatively high. Through heat conduction, this high temperature is transferred to the area where the tube sheet connects to the shell, causing the temperature in this connection area to rise. The shell section becomes a high-temperature stress zone. If the thermal stress at this location is concentrated and exceeds the maximum allowable operating temperature of the shell material, creep and other problems may occur with long-term use. Utility Model Content

[0003] In view of this, the present invention provides a heat exchanger resistant to high-temperature corrosion, in order to solve the problem that when the tube side of the heat exchanger is a high-temperature medium, the high temperature of the tube sheet at the inlet of the high-temperature medium in the tube side will lead to excessively high temperature in the area where the shell and the tube sheet are connected.

[0004] This utility model provides a heat exchanger resistant to high-temperature corrosion, comprising:

[0005] The shell body is equipped with a shell-side inlet and a shell-side outlet;

[0006] A first tube sheet is disposed at the first end of the cylinder, and the shell-side outlet is close to the first tube sheet;

[0007] The first end cap is connected to the first tube sheet, and the first end cap is provided with a tube-side inlet;

[0008] The second tube sheet is located at the second end of the cylinder, and the shell-side inlet is close to the second tube sheet;

[0009] The second end cap is connected to the second tube sheet, and the second end cap is provided with a tube-side outlet;

[0010] A circulation plate is disposed inside the cylinder and near its first end. The circulation plate is coaxially arranged with the cylinder and forms a cooling channel with the cylinder and / or the first tube sheet.

[0011] A refrigerant conduit, wherein a first end of the refrigerant conduit is adapted to allow refrigerant to pass through, and a second end of the refrigerant conduit is connected to the cooling channel.

[0012] Beneficial Effects: The shell-side inlet and outlet are provided. Refrigerant enters the shell-side inlet, while high-temperature medium enters the tube-side through the tube-side inlet. After heat exchange with the high-temperature medium inside the shell-side, the refrigerant flows out through the shell-side outlet. When the high-temperature medium entering from the tube-side inlet is at a high temperature, the first tube sheet will transfer the heat of the high-temperature medium to the connection between the first tube sheet and the shell-side. Therefore, the temperature in the connection area between the first tube sheet and the shell-side is too high, and this area is a high-temperature stress zone, which can easily lead to shell deformation after long-term use. By installing a circulation plate near the first end inside the shell-side, the circulation plate is coaxially arranged with the shell-side. The circulation plate, the shell-side, and / or the first tube sheet form a cooling channel. The first end of the refrigerant conduit is suitable for refrigerant to enter, and the second end of the refrigerant conduit is connected to the cooling channel. After the refrigerant enters the cooling channel, it will cool the connection area between the first tube sheet and the shell-side, thus preventing shell deformation.

[0013] In one optional embodiment, the outer periphery of the circulation plate is provided with an annular stepped structure, the stepped structure is connected to the inner wall of the cylinder, and the circulation plate, the cylinder and the first tube sheet form the cooling channel.

[0014] Beneficial effects: When the high-temperature medium entering from the tube-side inlet is at a high temperature, the first tube sheet will transfer the heat of the high-temperature medium to the connection between the first tube sheet and the shell. Therefore, the temperature in the connection area between the first tube sheet and the shell is too high. This area is a high-temperature stress zone, which can easily lead to shell deformation after long-term use. By setting an annular stepped structure on the outer periphery of the circulating plate, and connecting the stepped structure to the inner wall of the shell, the circulating plate, the shell, and the first tube sheet form a cooling channel. Therefore, the cooling channel is annular and adjacent to the connection area between the first tube sheet and the shell. After the refrigerant enters the cooling channel along the refrigerant conduit, it will effectively cool the connection area between the first tube sheet and the shell, thus preventing shell deformation.

[0015] In one alternative embodiment, there is a gap between the circulation plate and the first tube sheet.

[0016] Beneficial effects: Due to the gap between the circulating plate and the first tube sheet, the refrigerant entering the cooling channel can enter the shell through the gap and eventually flow out from the shell-side outlet, forming a circulation. The cooling channel does not need to be equipped with an additional outlet, and the structural design is reasonable and simple.

[0017] In one alternative embodiment, the first end of the refrigerant conduit is connected to the end of the cylinder near the second tube sheet.

[0018] Beneficial effects: The first end of the refrigerant conduit is connected to the end of the shell-side inlet near the second tube sheet. Therefore, the refrigerant entering the conduit is the same refrigerant that enters the shell-side inlet. After entering the conduit, the refrigerant flows towards the cooling channel, cooling the connection area between the first tube sheet and the shell, thus preventing shell deformation. Since the refrigerant conduit does not require external refrigerant, the structure is simpler. Furthermore, because the first end of the refrigerant conduit is connected to the end of the shell-side inlet near the second tube sheet, the refrigerant entering the shell-side inlet has not yet exchanged heat with the tube side. Therefore, the temperature of the refrigerant entering the conduit is lower, resulting in a better cooling effect on the connection area between the first tube sheet and the shell.

[0019] In one optional embodiment, the shell-side inlet and the shell-side outlet are located on one side of the cylinder, and the refrigerant conduit is located on the other side of the cylinder.

[0020] Beneficial effects: The shell-side inlet and shell-side outlet are located on one side of the shell, while the refrigerant conduit is located on the other side of the shell, which facilitates the installation of the refrigerant conduit and prevents interference between the refrigerant conduit and the shell-side inlet and the pipe-side inlet.

[0021] In one optional embodiment, one side of the first tube sheet is welded to the first end cap, and the other side is welded to the cylinder. One side of the second tube sheet is welded to the second end cap, and the other side is welded to the cylinder. Each weld includes a straight welding section and a fan-shaped welding section. The included angle between the two welding surfaces of the fan-shaped welding section is A, where 50°≤A≤60°.

[0022] Beneficial effects: The welding joints of the first tube sheet and the first head, the first tube sheet and the cylinder, the second tube sheet and the second head, and the second tube sheet and the cylinder adopt a combination of straight welding sections and fan-shaped welding sections, which can solve the problem of the tube sheet material being hard and difficult to process.

[0023] In one optional embodiment, the distance between the straight welded sections is L, where 0 mm < L ≤ 1 mm.

[0024] In one alternative embodiment, the thickness of the straight welded section is d, where 2.5 mm ≤ d ≤ 3 mm.

[0025] In one alternative embodiment, the cylinder is provided with lifting lugs symmetrically on its exterior.

[0026] Beneficial effects: By symmetrically equipping the outside of the shell with lifting lugs, it is easy to hoist the heat exchanger and adjust its position.

[0027] In one optional embodiment, the lifting lug device includes a lifting lug pad and a lifting lug, wherein the lifting lug pad is fixed to the outside of the cylinder, and the lifting lug is fixed to the lifting lug pad.

[0028] Beneficial effects: The lifting lug device includes a lifting lug pad and a lifting lug. The lifting lug pad is fixed to the outside of the cylinder, which can increase the contact area with the cylinder and ensure the connection strength between the lifting lug device and the cylinder. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a front sectional view of a heat exchanger according to an embodiment of the present utility model;

[0031] Figure 2 This is a top view of a heat exchanger according to an embodiment of the present utility model;

[0032] Figure 3 for Figure 1 Schematic diagram of the central circulation plate;

[0033] Figure 4 This is a partial cross-sectional view of a heat exchanger according to an embodiment of the present utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Shell; 101. Shell-side inlet; 102. Shell-side outlet; 103. Fourth plane; 104. Fourth inclined plane; 2. Cooling channel; 3. First tube sheet; 301. First plane; 302. First inclined plane; 303. Third plane; 304. Third inclined plane; 4. First head; 401. Second plane; 402. Second inclined plane; 5. Tube-side inlet; 6. Second tube sheet; 7. Second head; 8. Tube-side outlet; 9. Circulation plate; 901. Stepped structure; 10. Refrigerant duct; 11. Straight welded section; 12. Fan-shaped welded section; 13. Lifting lug plate; 14. Lifting lug; 15. General nameplate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not 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 of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] A heat exchanger consists of a tube side and a shell side. When the medium on the tube side is high-temperature, the inlet and outlet temperatures are approximately 750℃ / 434℃, while the medium on the shell side is low-temperature, with inlet and outlet temperatures around 246℃ / 600℃. In conventional designs, the tube sheet temperature at the inlet of the high-temperature medium on the tube side is relatively high. Through heat conduction, this high temperature is transferred to the area where the tube sheet connects to the shell, causing the temperature in this connection area to rise. The shell section becomes a high-temperature stress zone. If the thermal stress at this location is concentrated and exceeds the maximum allowable operating temperature of the shell material, creep and other problems may occur with long-term use.

[0041] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0042] According to an embodiment of the present invention, a heat exchanger resistant to high temperature corrosion is provided, comprising a shell 1, a first tube sheet 3, a first end cap 4, a second tube sheet 6, a second end cap 7, a circulation plate 9, and a refrigerant conduit 10.

[0043] The cylinder 1 has a shell-side inlet 101 and a shell-side outlet 102; a first tube sheet 3 is located at the first end of the cylinder 1, and the shell-side outlet 102 is close to the first tube sheet 3; a first end cap 4 is connected to the first tube sheet 3 and has a tube-side inlet 5; a second tube sheet 6 is located at the second end of the cylinder 1, and the shell-side inlet 101 is close to the second tube sheet 6; a second end cap 7 is connected to the second tube sheet 6 and has a tube-side outlet 8; a circulation plate 9 is located inside the cylinder 1 and close to its first end, and the circulation plate 9 is coaxially arranged with the cylinder 1, forming a cooling channel 2 with the cylinder 1 and / or the first tube sheet 3; the first end of the refrigerant conduit 10 is adapted to introduce refrigerant, and the second end of the refrigerant conduit 10 is connected to the cooling channel 2.

[0044] In this embodiment, the cylinder 1 is provided with a shell-side inlet 101 and a shell-side outlet 102. The refrigerant enters the interior of the cylinder 1 through the shell-side inlet 101, and the high-temperature medium enters the tube side through the tube-side inlet 5. After exchanging heat with the high-temperature medium in the tube side inside the cylinder 1, the refrigerant flows out through the shell-side outlet 102. When the high-temperature medium entering from the tube inlet 5 is at a high temperature, the first tube sheet 3 will transfer the heat of the high-temperature medium to the connection between the first tube sheet 3 and the cylinder 1. Therefore, the temperature of the connection area between the first tube sheet 3 and the cylinder 1 is too high. This area is a high-temperature stress zone, which can easily lead to deformation of the cylinder 1 after long-term use. By setting a circulation plate 9 near its first end inside the cylinder 1, the circulation plate 9 is coaxially set with the cylinder 1. The circulation plate 9, the cylinder 1 and / or the first tube sheet 3 form a cooling channel 2. The first end of the refrigerant conduit 10 is suitable for introducing refrigerant, and the second end of the refrigerant conduit 10 is connected to the cooling channel 2. After the refrigerant enters the cooling channel 2, it will cool down the connection area between the first tube sheet 3 and the cylinder 1, thus preventing deformation of the cylinder 1.

[0045] In one embodiment, the outer periphery of the circulation plate 9 is provided with an annular stepped structure 901, which is connected to the inner wall of the cylinder 1. The circulation plate 9, the cylinder 1, and the first tube sheet 3 form a cooling channel 2.

[0046] In this embodiment, when the high-temperature medium entering from the tube inlet 5 is at a high temperature, the first tube sheet 3 will transfer the heat of the high-temperature medium to the connection between the first tube sheet 3 and the cylinder 1. Therefore, the temperature of the connection area between the first tube sheet 3 and the cylinder 1 is too high. This area is a high-temperature stress area, which can easily lead to deformation of the cylinder 1 after long-term use. By providing an annular stepped structure 901 on the outer periphery of the circulation plate 9, and the stepped structure 901 is connected to the inner wall of the cylinder 1, the circulation plate 9, the cylinder 1 and the first tube sheet 3 form a cooling channel 2. Therefore, the cooling channel 2 is annular and is adjacent to the connection area between the first tube sheet 3 and the cylinder 1. After the refrigerant enters the cooling channel 2 along the refrigerant conduit 10, it will effectively cool the connection area between the first tube sheet 3 and the cylinder 1, thus preventing deformation of the cylinder 1.

[0047] In one specific embodiment, the stepped structure 901 is welded to the inner wall of the cylinder 1.

[0048] In an alternative embodiment, a cooling channel 2 may be provided on the outer side of the first end of the cylinder 1.

[0049] In one embodiment, there is a gap between the circulation plate 9 and the first tube sheet 3.

[0050] In this embodiment, since there is a gap between the circulating plate 9 and the first tube sheet 3, the refrigerant entering the cooling channel 2 can enter the interior of the shell 1 through the gap and finally flow out from the shell side outlet 102 to form a circulation. The cooling channel 2 does not need to be provided with an additional outlet, and the structural design is reasonable and simple.

[0051] like Figure 1 As shown, the refrigerant entering the cooling channel 2 can flow upward into the gap between the circulation plate 9 and the first tube sheet 3, and then flow downward into the interior of the cylinder 1.

[0052] In one embodiment, the first end of the refrigerant conduit 10 is connected to the end of the cylinder 1 near the second tube sheet 6.

[0053] In this embodiment, the first end of the refrigerant conduit 10 is connected to the end of the cylinder 1 near the second tube sheet 6. Therefore, the refrigerant entering the refrigerant conduit 10 is the same refrigerant that enters the cylinder 1 from the shell-side inlet 101. After entering the refrigerant conduit 10, the refrigerant flows to the cooling channel 2, which cools the connection area between the first tube sheet 3 and the cylinder 1, preventing deformation of the cylinder 1. Since the refrigerant conduit 10 does not require external refrigerant, its structure is simpler. Furthermore, because the first end of the refrigerant conduit 10 is connected to the end of the cylinder 1 near the second tube sheet 6, the refrigerant entering the cylinder 1 from the shell-side inlet 101 has not yet exchanged heat with the tube side. Therefore, the temperature of the refrigerant entering the refrigerant conduit 10 is lower, resulting in a better cooling effect on the connection area between the first tube sheet 3 and the cylinder 1.

[0054] In one specific embodiment, the first tube sheet 3 is disposed at the upper end of the cylinder 1, the second tube sheet 6 is disposed at the lower end of the cylinder 1, the first end of the refrigerant conduit 10 is connected to the lower end of the cylinder 1, and the first end of the refrigerant conduit 10 passes through the cylinder 1 and communicates with the interior of the cylinder 1.

[0055] In one embodiment, the shell-side inlet 101 and shell-side outlet 102 are located on one side of the cylinder 1, and the refrigerant conduit 10 is located on the other side of the cylinder 1.

[0056] In this embodiment, the shell-side inlet 101 and the shell-side outlet 102 are located on one side of the cylinder 1, and the refrigerant conduit 10 is located on the other side of the cylinder 1, which facilitates the installation of the refrigerant conduit 10 and ensures that the refrigerant conduit 10 does not interfere with the shell-side inlet 101 and the pipe-side inlet 5.

[0057] Specifically, such as Figure 1 As shown, the shell-side inlet 101 and shell-side outlet 102 are located on the right side of the shell 1, and the refrigerant conduit 10 is located on the left side of the shell 1.

[0058] In one embodiment, one side of the first tube sheet 3 is welded to the first end cap 4 and the other side is welded to the cylinder 1. One side of the second tube sheet 6 is welded to the second end cap 7 and the other side is welded to the cylinder 1. Each weld includes a straight welding section 11 and a fan-shaped welding section 12. The included angle between the two welding surfaces of the fan-shaped welding section 12 is A, where 50°≤A≤60°.

[0059] In this embodiment, the welding joints of the first tube sheet 3 and the first end cap 4, the welding joints of the first tube sheet 3 and the cylinder 1, the welding joints of the second tube sheet 6 and the second end cap 7, and the welding joints of the second tube sheet 6 and the cylinder 1 adopt a combination of straight welding section 11 and fan-shaped welding section 12, which can solve the problem that the tube sheet material is hard and difficult to process.

[0060] Specifically, the first tube sheet 3 has a first plane 301 and a first inclined surface 302 on the side facing the first end cap 4. The first inclined surface 302 is inclined away from the first plane 301. The first end cap 4 has a second plane 401 and a second inclined surface 402 on the side facing the first tube sheet 3. The second plane 401 is parallel to and directly opposite the first plane 301, and the second inclined surface 402 is directly opposite the first inclined surface 302. The second inclined surface 402 is inclined away from the second plane 301. Therefore, the weld between the first tube sheet 3 and the first end cap 4 includes a straight welding section 11 and a fan-shaped welding section 12. The straight welding section 11 is located between the first plane 301 and the second plane 401, and the fan-shaped welding section 12 is located between the first inclined surface 302 and the second inclined surface 402.

[0061] Specifically, the first tube sheet 3 has a third plane 303 and a third inclined plane 304 on the side facing the cylinder 1. The third inclined plane 304 is inclined away from the cylinder 1 along the direction away from the third plane 303. The cylinder 1 has a fourth plane 103 and a fourth inclined plane 104 on the side facing the first tube sheet 3. The fourth plane 103 is parallel to and directly opposite the third plane 303, and the fourth inclined plane 104 is directly opposite to the third plane 303. The fourth inclined plane 104 is inclined away from the first tube sheet 3 along the direction away from the fourth plane 103. Therefore, the weld between the first tube sheet 3 and the cylinder 1 includes a straight welding section 11 and a fan-shaped welding section 12. The straight welding section 11 is located between the third plane 303 and the fourth plane 103, and the fan-shaped welding section 12 is located between the third inclined plane 304 and the fourth inclined plane 104.

[0062] The welding joint between the second tube sheet 6 and the second end cap 7 is symmetrically arranged with the welding joint between the first tube sheet 3 and the first end cap 4, and will not be described in detail in this embodiment.

[0063] The welding joint between the second tube sheet 6 and the cylinder 1 is symmetrically arranged with respect to the welding joint between the first tube sheet 3 and the cylinder 1, and will not be described in detail in this embodiment.

[0064] In one embodiment, the distance of the straight welded segment 11 is L, where 0 mm < L ≤ 1 mm.

[0065] In one specific embodiment, the distance of the straight welding segment 11 is 1 mm.

[0066] In one specific embodiment, the distance of the straight welding segment 11 is 0.5 mm.

[0067] In one embodiment, the thickness of the straight welded section 11 is d, where 2.5 mm ≤ d ≤ 3 mm.

[0068] In one specific embodiment, the thickness of the straight welded section 11 is 2.5 mm.

[0069] In one specific embodiment, the thickness of the straight welded section 11 is 2.8 mm.

[0070] In one specific embodiment, the thickness of the straight welded section 11 is 3 mm.

[0071] In one embodiment, the cylinder 1 is symmetrically provided with lifting lugs.

[0072] In this embodiment, by symmetrically providing lifting lugs on the outside of the cylinder 1, it is convenient to hoist the heat exchanger and adjust its position.

[0073] In one specific embodiment, two lifting lugs are symmetrically provided, combined with Figure 1 and Figure 2 Shell-side inlet 101 and shell-side outlet 102 are located on the right side of the shell body 1, refrigerant conduit 10 is located on the left side of the shell body 1, a lifting lug is located on the front side of the shell body 1, and a lifting lug is located on the rear side of the shell body 1.

[0074] More specifically, in the height direction, the lifting lug is located between the shell-side inlet 101 and the shell-side outlet 102.

[0075] In one embodiment, the lifting lug device includes a lifting lug pad 13 and a lifting lug 14, with the lifting lug pad 13 fixed to the outside of the cylinder 1 and the lifting lug 14 fixed to the lifting lug pad 13.

[0076] In this embodiment, the lifting lug device includes a lifting lug pad 13 and a lifting lug 14. The lifting lug pad 13 is fixed to the outside of the cylinder 1, which can increase the contact area with the cylinder 1 and ensure the connection strength between the lifting lug device and the cylinder 1.

[0077] In one embodiment, a universal nameplate 15 is also provided on the outside of the cylinder 1.

[0078] The high-temperature corrosion resistant heat exchanger provided in this embodiment has a shell-side inlet 101 and a shell-side outlet 102 in the shell body 1. The refrigerant enters the interior of the shell body 1 through the shell-side inlet 101, and the high-temperature medium enters the tube side through the tube side inlet 5. After exchanging heat with the high-temperature medium in the tube side inside the shell body 1, the refrigerant flows out through the shell-side outlet 102. When the high-temperature medium entering from the tube-side inlet 5 is at a high temperature, the first tube sheet 3 will transfer the heat of the high-temperature medium to the connection between the first tube sheet 3 and the shell 1. Therefore, the temperature of the connection area between the first tube sheet 3 and the shell 1 is too high. This area is a high-temperature stress zone, which can easily lead to deformation of the shell 1 after long-term use. By providing a circulation plate 9 near its first end inside the shell 1, the circulation plate 9 is coaxially arranged with the shell 1. The outer periphery of the circulation plate 9 is provided with an annular stepped structure 901, which is connected to the inner wall of the shell 1. The circulation plate 9, the shell 1, and the first tube sheet 3 form a cooling channel 2. The first end of the refrigerant conduit 10 is connected to the end of the shell 1 near the second tube sheet 6, and the second end of the refrigerant conduit 10 is connected to the cooling channel 2. Some of the refrigerant entering the shell 1 from the shell-side inlet 101 will enter the refrigerant conduit 10 and enter the cooling channel 2 along the refrigerant conduit 10, which will cool the connection area between the first tube sheet 3 and the shell 1 and prevent the shell 1 from deforming. Since the first end of the refrigerant conduit 10 is connected to the end of the shell 1 near the second tube sheet 6, the refrigerant entering the shell 1 from the shell-side inlet 101 has not yet exchanged heat with the tube side. Therefore, the temperature of the refrigerant entering the refrigerant conduit 10 is relatively low, resulting in a better cooling effect on the connection area between the first tube sheet 3 and the shell 1.

[0079] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A heat exchanger resistant to high-temperature corrosion, characterized in that, include: The shell body (1) is provided with a shell-side inlet (101) and a shell-side outlet (102); The first tube sheet (3) is located at the first end of the cylinder (1), and the shell side outlet (102) is close to the first tube sheet (3); The first end cap (4) is connected to the first tube sheet (3), and the first end cap (4) is provided with a tube-side inlet (5); The second tube sheet (6) is located at the second end of the cylinder (1), and the shell-side inlet (101) is close to the second tube sheet (6); The second end cap (7) is connected to the second tube sheet (6), and the second end cap (7) is provided with a tube-side outlet (8); A circulation plate (9) is disposed inside the cylinder (1) and near its first end. The circulation plate (9) is coaxially arranged with the cylinder (1). The circulation plate (9) and the cylinder (1) and / or the first tube sheet (3) form a cooling channel (2). A refrigerant conduit (10) is provided, the first end of which is adapted to allow refrigerant to pass through, and the second end of which is connected to the cooling channel (2).

2. The high-temperature corrosion resistant heat exchanger according to claim 1, characterized in that, The outer periphery of the circulation plate (9) is provided with an annular stepped structure (901), the stepped structure (901) is connected to the inner wall of the cylinder (1), and the circulation plate (9), the cylinder (1) and the first tube sheet (3) form the cooling channel (2).

3. A high-temperature corrosion resistant heat exchanger according to claim 2, characterized in that, There is a gap between the circulation plate (9) and the first tube sheet (3).

4. A high-temperature corrosion resistant heat exchanger according to any one of claims 1 to 3, characterized in that, The first end of the refrigerant conduit (10) is connected to the end of the cylinder (1) near the second tube sheet (6).

5. A high-temperature corrosion resistant heat exchanger according to any one of claims 1 to 3, characterized in that, The shell-side inlet (101) and the shell-side outlet (102) are located on one side of the cylinder (1), and the refrigerant conduit (10) is located on the other side of the cylinder (1).

6. A high-temperature corrosion resistant heat exchanger according to any one of claims 1 to 3, characterized in that, One side of the first tube sheet (3) is welded to the first end cap (4), and the other side is welded to the cylinder (1). One side of the second tube sheet (6) is welded to the second end cap (7), and the other side is welded to the cylinder (1). Each weld includes a straight welding section (11) and a fan-shaped welding section (12). The included angle between the two welding surfaces of the fan-shaped welding section (12) is A, where 50°≤A≤60°.

7. A high-temperature corrosion resistant heat exchanger according to claim 6, characterized in that, The distance of the straight welding section (11) is L, where 0 mm < L ≤ 1 mm.

8. A high-temperature corrosion resistant heat exchanger according to claim 6, characterized in that, The thickness of the straight welded section (11) is d, 2.5 mm ≤ d ≤ 3 mm.

9. A high-temperature corrosion resistant heat exchanger according to any one of claims 1 to 3, characterized in that, The cylinder (1) is symmetrically provided with lifting lugs on its outside.

10. A high-temperature corrosion resistant heat exchanger according to claim 9, characterized in that, The lifting lug device includes a lifting lug pad (13) and a lifting lug (14). The lifting lug pad (13) is fixed to the outside of the cylinder (1), and the lifting lug (14) is fixed to the lifting lug pad (13).

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