Multi-strand winding pipe type heat exchanger

Abstract

The utility model discloses a multi-strand winding pipe type heat exchanger which comprises a shell, shell end sockets are arranged at the two ends of the shell respectively, pipe plates are arranged on the inner sides of the shell end sockets, a plurality of strands of pipe bundles are arranged between the two pipe plates, the opposite end faces of the two pipe plates are connected with pipe box end sockets respectively, and installation holes are formed in the shell end sockets. The shell sealing head is in flange connection with the shell; and the tube plate and the shell sealing head are detachably and hermetically connected through a fastening mechanism. The tube pass and the shell pass can be detached, when dirt deposited on the inner wall side of the shell pass and the outer wall side of the tube bundle needs to be cleaned, the fastening mechanism is detached firstly, then the flange between the shell end socket and the shell is detached, and then the shell end socket, the shell and the tube plate can be detached. Then carrying out corresponding cleaning; and after cleaning is completed, all the components are restored and installed, the heat exchanger can be reused, and therefore the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a multi-stream wound tube heat exchanger. Background Art

[0002] Compared with ordinary shell-and-tube heat exchangers, wound tube heat exchangers have incomparable advantages. They are applicable to a wide temperature range, adapt to thermal shock, eliminate thermal stress by themselves, and are highly compact. By setting up multiple tube passes, they can meet the simultaneous heat exchange of multiple fluids in one device. They are suitable for heat exchange occasions between multiple fluids in the fields of petroleum, natural gas, chemical industry, etc.

[0003] A wound tube heat exchanger with multiple tube passes is called a multi-stream wound tube heat exchanger, and its structure usually includes a shell, with heads provided at the upper and lower ends of the shell, a tube sheet provided on the inner side of the head, and multiple tube bundles provided between the upper and lower tube sheets to form multiple tube passes. Through holes connected to the tube bundles are provided on the tube sheets, and pipe box heads are connected to the opposite end faces of the two tube sheets, which are respectively used to set the tube pass inlet and the tube pass outlet.

[0004] Currently, the connections between the head and shell, and between the tube sheet and head, are welded—that is, the tube side and shell side are welded. After long-term use, dirt accumulates on the inner wall of the shell side and the outer wall of the tube bundle, reducing heat transfer efficiency. However, the welded connections between the head and shell, and between the tube sheet and head, prevent non-destructive disassembly of the tube side and shell side, making it impossible to clean the dirt deposited on the inner wall of the shell side and the outer wall of the tube bundle, thus shortening the service life of the equipment. Utility Model Content

[0005] In order to solve the problem that the tube side and the shell side of the existing multi-stream wound tube heat exchanger cannot be disassembled, the utility model provides a multi-stream wound tube heat exchanger.

[0006] A multi-stream wound tube heat exchanger comprises a shell, a shell head disposed at each end of the shell, a tube sheet disposed inside the shell head, a multi-stream tube bundle fixedly disposed between the two tube sheets, through holes disposed on the tube sheets communicating with the tube bundle, and tube box heads connected to opposite end surfaces of the two tube sheets, respectively. The shell head is provided with a mounting hole for the tube box head to pass through.

[0007] The shell head is flange-connected to the shell;

[0008] The tube sheet and the shell head are detachably sealed and connected via a fastening mechanism.

[0009] Preferably, the shell head comprises a head body, a circular through hole is provided in the middle of the head body, a horizontal ring plate is fixedly provided in the circular through hole, and the mounting hole is provided in the middle of the horizontal ring plate;

[0010] A seal is provided between the inner side of the horizontal ring plate and the corresponding tube sheet;

[0011] The tube plate and the horizontal ring plate are detachably connected via a fastening mechanism.

[0012] Preferably, the sealing member comprises a first sealing gasket arranged between the inner side of the horizontal ring plate and the corresponding tube plate.

[0013] Preferably, the fastening mechanism comprises a plurality of fastening bolts evenly arranged along the circumferential direction;

[0014] The horizontal ring plate and the first sealing gasket are both provided with a plurality of connection holes corresponding to the fastening bolts one by one, and the tube plate is provided with a plurality of threaded holes corresponding to the fastening bolts one by one.

[0015] Preferably, an anti-corrosion layer is provided on the inner wall of the shell, the inner wall of the shell head, and the surface of the tube sheet.

[0016] Preferably, the anti-corrosion layer is a titanium metal layer, a chromium metal layer, or a nickel metal layer.

[0017] Preferably, a head flange plate is provided on the pipe box head, and the head flange plate is located between the corresponding tube plate and the horizontal ring plate;

[0018] The sealing member includes a second sealing gasket arranged between the inner side of the horizontal ring plate and the corresponding head flange plate, and a third sealing gasket arranged between the head flange plate and the corresponding tube plate.

[0019] Preferably, the fastening mechanism comprises a plurality of fastening bolts evenly arranged along the circumferential direction;

[0020] The horizontal ring plate, the second sealing gasket, the head flange plate and the third sealing gasket are all provided with a plurality of connection holes corresponding to the fastening bolts one by one, and the tube plate is provided with a plurality of threaded holes corresponding to the fastening bolts one by one.

[0021] Preferably, the fastening mechanism includes a fastening buckle, and the fastening buckle includes two symmetrically arranged half-ring buckles, each of which includes an arc-shaped body and horizontal connecting plates located at both ends of the arc-shaped body, and the horizontal connecting plates corresponding to the two half-ring buckles are connected by a fastening screw;

[0022] A fastening clamping surface is provided on the radial inner side wall of the semi-ring buckle, and the fastening clamping surface is in a frustum structure, and the large end of the fastening clamping surface is away from the corresponding tube sheet;

[0023] A fastening fitting body is provided on the pipe box head extending out of the mounting hole, wherein the radial outer side surface of the fastening fitting body is a frustum structure, and the large end of the fastening fitting body is away from the corresponding tube sheet;

[0024] The fastening clip is located between the fastening fitting body and the horizontal ring plate, and the fastening clamping surface is in contact with the radial outer side surface of the fastening fitting body; when the fastening screw is tightened to make the two half-ring clips approach each other, the fastening clamping surface pushes the fastening fitting body to press the tube plate toward the corresponding horizontal ring plate.

[0025] The beneficial effects of the utility model are:

[0026] (1) The tube side and the shell side of the present invention can be disassembled. When it is necessary to clean the dirt deposited on the inner wall of the shell side and the outer wall of the tube bundle, the fastening mechanism is first disassembled, and then the flange between the shell head and the shell is disassembled, so that the shell head, shell, and tube sheet can be disassembled, and then the corresponding cleaning is carried out; after cleaning, the various components are restored and installed, and the heat exchanger can be reused, thereby increasing the service life of the equipment.

[0027] (2) The provision of the anti-corrosion layer in the present invention improves the anti-corrosion performance of the heat exchanger and can adapt to heat exchange conditions when the shell-side material is a strong acid, a strong base, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0029] Figure 1 This is a schematic structural diagram of a multi-stream wound tube heat exchanger in Example 1 of the present utility model;

[0030] Figure 2 This is a schematic structural diagram of a multi-stream wound tube heat exchanger in Example 2 of the present utility model;

[0031] Figure 3 yes Figure 2 A partial enlarged view of middle A;

[0032] Figure 4 This is a schematic structural diagram of a multi-stream wound tube heat exchanger in Example 3 of the present utility model;

[0033] Figure 5 This is a schematic structural perspective diagram of the fastening buckle in the utility model;

[0034] Figure 6 This is a schematic top view of the structure of the fastening buckle in the utility model;

[0035] Figure 7 yes Figure 6 BB cross-sectional view;

[0036] in:

[0037] 1-shell, 2-shell head, 3-tube sheet, 4-tube bundle, 5-tube box head, 51-head flange plate, 6-horizontal ring plate, 61-mounting hole, 71-first sealing gasket, 72-second sealing gasket, 73-third sealing gasket, 8-fastening bolt, 9-semi-ring buckle, 91-arc-shaped body, 92-horizontal connecting plate, 93-fastening screw, 94-fastening clamping surface, 10-fastening fitting, 11-anti-corrosion layer. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1:

[0040] like Figure 1 As shown, a multi-stream wound tube heat exchanger includes a shell 1, a shell head 2 is provided at each end of the shell 1, a tube sheet 3 is provided on the inner side of the shell head 2, and a multi-stream tube bundle 4 is fixedly installed between the two tube sheets 3. The tube sheet 3 is provided with a through hole connected to the tube bundle 4. The opposite end surfaces of the two tube sheets 3 are respectively connected to the tube box head 5, and the shell head 2 is provided with a mounting hole 61 for the tube box head 5 to pass through. Specifically, the two tube box heads 5 are respectively provided with a tube side inlet and a tube side outlet, and the two shell heads 2 are respectively provided with a shell side inlet and a shell side outlet.

[0041] The shell head 2 is flange-connected to the shell 1;

[0042] The tube sheet 3 and the shell head 2 are detachably sealed and connected via a fastening mechanism.

[0043] Preferably, the shell head 2 includes a head body, a circular through hole is provided in the middle of the head body, a horizontal ring plate 6 is fixedly provided in the circular through hole, and the mounting hole 61 is provided in the middle of the horizontal ring plate 6;

[0044] A seal is provided between the inner side of the horizontal ring plate 6 and the corresponding tube plate 3;

[0045] The tube plate 3 and the horizontal ring plate 6 are detachably connected via a fastening mechanism.

[0046] Preferably, the sealing member includes a first sealing gasket 71 arranged between the inner side of the horizontal ring plate 6 and the corresponding tube plate 3.

[0047] Preferably, the fastening mechanism comprises a plurality of fastening bolts 8 evenly arranged along the circumferential direction;

[0048] The horizontal ring plate 6 and the first sealing gasket 71 are each provided with a plurality of connection holes corresponding one-to-one with the fastening bolts 8. The tube sheet 3 is also provided with a plurality of threaded holes corresponding one-to-one with the fastening bolts 8. The fastening bolts 8 are installed in the corresponding connection holes and threaded holes to achieve a sealed and removable connection between the horizontal ring plate 6 and the corresponding tube sheet 3.

[0049] Preferably, an anti-corrosion layer 11 is provided on the inner wall of the shell 1 , the inner wall of the shell head 2 , and the surface of the tube sheet 3 .

[0050] Preferably, the anti-corrosion layer 11 is a titanium metal layer, a chromium metal layer, or a nickel metal layer. The provision of the anti-corrosion layer 11 in the present application improves the corrosion resistance of the heat exchanger and can adapt to heat exchange conditions when the shell-side material is a strong acid or a strong base.

[0051] In Example 1, the tube box head 5 is fixedly connected to the tube sheet 3.

[0052] In the multi-stream wound tube heat exchanger in Example 1, the shell 1 and the shell head 2 are flange-connected, and the shell head 2 and the tube sheet 3 are detachably connected by fastening bolts 8, so that the tube side and the shell side can be disassembled. When it is necessary to clean the dirt deposited on the inner wall of the shell side and the outer wall of the tube bundle, first remove the fastening bolts 8, and then remove the flange between the shell head 2 and the shell 1, so that the shell head 2, the shell 1, and the tube sheet 3 can be disassembled, and then corresponding cleaning can be carried out; after cleaning, the various components are restored and installed, and the heat exchanger can be reused, thereby increasing the service life of the equipment.

[0053] Example 2:

[0054] The difference from Example 1 is that a head flange plate 51 is provided on the pipe box head 5, and the head flange plate 51 is located between the corresponding tube plate 3 and the horizontal ring plate 6;

[0055] like Figure 2-Figure 3 As shown, the sealing member includes a second sealing gasket 72 arranged between the inner side of the horizontal ring plate 6 and the corresponding head flange plate 51 and a third sealing gasket 73 arranged between the head flange plate 51 and the corresponding tube plate 3.

[0056] Preferably, the fastening mechanism comprises a plurality of fastening bolts 8 evenly arranged along the circumferential direction;

[0057] The horizontal ring plate 6, second sealing gasket 72, head flange plate 51, and third sealing gasket 73 are each provided with a plurality of connection holes corresponding one-to-one with the fastening bolts 8. The tube sheet 3 is also provided with a plurality of threaded holes corresponding one-to-one with the fastening bolts 8. Fastening bolts 8 are installed in the corresponding connection holes and threaded holes to achieve a sealed and removable connection between the horizontal ring plate 6 and the corresponding tube sheet 3.

[0058] In Example 2, the tube box head 5 is detachably connected to the tube sheet 3 via the head flange plate 51 .

[0059] In the multi-stream wound tube heat exchanger in Example 2, the shell 1 and the shell head 2 are flange-connected, and the shell head 2 and the tube sheet 3 are detachably connected by fastening bolts 8, so that the tube side and the shell side can be disassembled. When it is necessary to clean the dirt deposited on the inner wall of the shell side and the outer wall of the tube bundle, first remove the fastening bolts 8, and then remove the flange between the shell head 2 and the shell 1, so that the shell head 2, shell 1, tube sheet 3, and tube box head 5 can be disassembled, and then corresponding cleaning can be carried out; after cleaning, the various components are restored and installed, and the heat exchanger can be reused, thereby increasing the service life of the equipment.

[0060] Example 3:

[0061] The difference from Example 1 is that the fastening mechanism includes a fastening buckle, such as Figure 5-Figure 7 As shown, the fastening buckle includes two symmetrically arranged half-ring buckles 9, each of which includes an arc-shaped body 91 and horizontal connecting plates 92 located at both ends of the arc-shaped body 91. The horizontal connecting plates 92 corresponding to the two half-ring buckles 9 are connected by fastening screws 93;

[0062] like Figure 4 As shown, a fastening clamping surface 94 is provided on the radial inner side wall of the semi-ring buckle 9. The fastening clamping surface 94 is a frustum structure, and the large end of the fastening clamping surface 94 is away from the corresponding tube sheet 3.

[0063] A fastening body 10 is provided on the pipe box head 5 extending out of the mounting hole 61. The radial outer side surface of the fastening body 10 is a frustum structure, and the large end of the fastening body 10 is away from the corresponding tube sheet 3.

[0064] The fastening clip is located between the fastening fitting body 10 and the horizontal ring plate 6, and the fastening clamping surface 94 is in contact with the radial outer side surface of the fastening fitting body 10; when the fastening screw 93 is tightened to make the two half-ring clips 9 approach each other, the fastening clamping surface 94 pushes the fastening fitting body 10 to press the tube plate 3 toward the corresponding horizontal ring plate 6.

[0065] In Example 3, the tube box head 5 and the tube sheet 3 are fixedly connected.

[0066] In the multi-stream wound tube heat exchanger in Example 3, the shell 1 and the shell head 2 are flange-connected, and the shell head 2 and the tube sheet 3 are detachably connected by fastening clips and fastening fittings 10, so that the tube side and the shell side can be disassembled. When it is necessary to clean the dirt deposited on the inner wall of the shell side and the outer wall of the tube bundle, first remove the two fastening screws 93 and remove the two half-ring clips 9, and then remove the flange between the shell head 2 and the shell 1, so that the shell head 2, shell 1, and tube sheet 3 can be disassembled, and then corresponding cleaning can be carried out; after cleaning, the various components are restored and installed, and the heat exchanger can be reused, thereby increasing the service life of the equipment.

[0067] Although the above describes the specific implementation methods of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A multi-stream wound tube heat exchanger, comprising a shell (1), a shell head (2) is provided at each end of the shell (1), a tube sheet (3) is provided on the inner side of the shell head (2), a multi-stream tube bundle (4) is fixedly provided between the two tube sheets (3), a through hole connected to the tube bundle (4) is provided on the tube sheet (3), a tube box head (5) is connected to the opposite end surfaces of the two tube sheets (3), and a mounting hole (61) for the tube box head (5) to pass through is provided on the shell head (2); characterized in that The shell head (2) and the shell (1) are flange-connected; The tube sheet (3) and the shell head (2) are detachably sealed and connected via a fastening mechanism.

2. The multi-stream wound tube heat exchanger according to claim 1, characterized in that: The shell head (2) comprises a head body, a circular through hole is provided in the middle of the head body, a horizontal ring plate (6) is fixedly provided in the circular through hole, and the mounting hole (61) is provided in the middle of the horizontal ring plate (6); A seal is provided between the inner side of the horizontal ring plate (6) and the corresponding tube plate (3); The tube plate (3) and the horizontal ring plate (6) are detachably connected via a fastening mechanism.

3. The multi-stream wound tube heat exchanger according to claim 2, characterized in that: The sealing member comprises a first sealing gasket (71) arranged between the inner side of the horizontal ring plate (6) and the corresponding tube plate (3).

4. The multi-stream wound tube heat exchanger according to claim 3, characterized in that: The fastening mechanism comprises a plurality of fastening bolts (8) evenly arranged along the circumferential direction; The horizontal ring plate (6) and the first sealing gasket (71) are both provided with a plurality of connection holes corresponding one-to-one to the fastening bolts (8), and the tube plate (3) is provided with a plurality of threaded holes corresponding one-to-one to the fastening bolts (8).

5. The multi-stream wound tube heat exchanger according to claim 1, wherein: An anti-corrosion layer (11) is provided on the inner side wall of the shell (1), the inner side wall of the shell head (2), and the surface of the tube sheet (3).

6. The multi-stream wound tube heat exchanger according to claim 5, characterized in that: The anti-corrosion layer (11) is a titanium metal layer, a chromium metal layer or a nickel metal layer.

7. The multi-stream wound tube heat exchanger according to claim 2, wherein: A head flange plate (51) is provided on the tube box head (5), and the head flange plate (51) is located between the corresponding tube plate (3) and the horizontal ring plate (6); The sealing member comprises a second sealing gasket (72) arranged between the inner side of the horizontal ring plate (6) and the corresponding head flange plate (51), and a third sealing gasket (73) arranged between the head flange plate (51) and the corresponding tube plate (3).

8. The multi-stream wound tube heat exchanger according to claim 7, characterized in that: The fastening mechanism comprises a plurality of fastening bolts (8) evenly arranged along the circumferential direction; The horizontal ring plate (6), the second sealing gasket (72), the head flange plate (51), and the third sealing gasket (73) are all provided with a plurality of connection holes corresponding one-to-one to the fastening bolts (8), and the tube plate (3) is provided with a plurality of threaded holes corresponding one-to-one to the fastening bolts (8).

9. The multi-stream wound tube heat exchanger according to claim 3, characterized in that: The fastening mechanism comprises a fastening buckle, wherein the fastening buckle comprises two symmetrically arranged half-ring buckles (9), wherein the half-ring buckle (9) comprises an arc-shaped main body (91) and horizontal connecting plates (92) located at both ends of the arc-shaped main body (91), and the horizontal connecting plates (92) corresponding to the two half-ring buckles (9) are connected by a fastening screw (93); A fastening clamping surface (94) is provided on the radial inner side wall of the semi-ring buckle (9), the fastening clamping surface (94) is in a truncated cone structure, and the large end of the fastening clamping surface (94) is away from the corresponding tube sheet (3); A fastening fitting body (10) is provided on the pipe box sealing head (5) extending out of the mounting hole (61), wherein the radial outer side surface of the fastening fitting body (10) is a frustum structure, and the large end of the fastening fitting body (10) is away from the corresponding tube sheet (3); The fastening clip is located between the fastening fitting body (10) and the horizontal ring plate (6), and the fastening clamping surface (94) is in contact with the radial outer side surface of the fastening fitting body (10); when the fastening screw (93) is tightened to make the two half-ring clips (9) approach each other, the fastening clamping surface (94) pushes the fastening fitting body (10) to press the tube plate (3) toward the corresponding horizontal ring plate (6).

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