Tube plate lining structure for tantalum alloy heat exchanger

Abstract

In order to solve the problem of unreliable installation of a heat exchanger tube plate and a lining plate, the tube plate lining structure for the tantalum alloy heat exchanger comprises a base tube plate and a heat exchange tube, the tantalum alloy lining plate is welded to the shell pass side of the base tube plate, and installation holes which are correspondingly distributed in position are formed in a non-tube-distribution area between the base tube plate and the tantalum alloy lining plate. The base layer tube plate and the heat exchange tube are fixedly connected through a tantalum nail, a base plate groove is formed in the surface of the base layer tube plate, a tantalum alloy base plate is arranged in the base plate groove, the tantalum nail penetrates through the base plate and then is fixedly connected with the base layer tube plate, and the heat exchange tube is a tantalum alloy heat exchange tube. Equipment manufacturing and maintenance cost is reduced, and long-period stable operation of heat exchanger equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a tube sheet lining structure for a tantalum alloy heat exchanger. Background Art

[0002] Tantalum alloy has excellent properties such as high melting point, good ductility, high thermal conductivity, chemical stability and corrosion resistance. It is increasingly used in the fields of chemistry and chemical industry. Tantalum alloy is a rare metal with high density, good toughness and ductility, high temperature strength and good processing performance. However, the content of metallic tantalum in nature is low and the smelting cost is expensive. The direct use of tantalum alloy materials in heat exchangers is costly and wastes resources. Therefore, composite plate structure and loose lining structure are mainly used in heat exchanger design. Solving the design of tube sheet lining structure for tantalum alloy heat exchangers is a core issue in the design and manufacture of tantalum alloy equipment.

[0003] The existing tantalum alloy heat exchanger tube sheets are generally connected by welding. When leakage occurs in the weld between the tube sheet and the tantalum alloy liner, it is difficult to detect and affects the structural strength, corrosion resistance, heat transfer and other properties of the tube sheet itself. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a tube sheet lining structure for a tantalum alloy heat exchanger, and the technical solution adopted is as follows:

[0005] A tube sheet lining structure for a tantalum alloy heat exchanger comprises a base tube sheet and a heat exchange tube, wherein a tantalum alloy lining is welded on the shell side of the base tube sheet, mounting holes corresponding to the positions of the base tube sheet and the tantalum alloy lining are arranged in a non-tube laying area, the two are fixedly connected by tantalum nails, and a pad groove is arranged on the surface of the base tube sheet, a tantalum alloy pad is arranged in the pad groove, and the tantalum nail is fixedly connected to the base tube sheet after passing through the pad, and the heat exchange tube is a tantalum alloy heat exchange tube.

[0006] Furthermore, the mounting hole on the tantalum alloy liner is provided with a first flange distributed toward the shell side, and the first flange is welded to the tantalum nail.

[0007] Furthermore, the tantalum alloy liner is provided with a fixing hole for matching with the tantalum alloy heat exchange tube, the fixing hole is provided with a second flange distributed on the shell side, and the second flange is welded to the tantalum alloy heat exchange tube.

[0008] Furthermore, the tantalum alloy liner has a thickness of 0.6 to 0.8 mm.

[0009] Furthermore, the flange length between the tantalum alloy lining plate and the tantalum alloy heat exchange tube is 5 to 6 mm, and the two are sealed and welded.

[0010] Furthermore, a leak detection hole connected to the weld between the tantalum alloy liner and the base tube sheet is provided on the radial outer side of the base tube sheet.

[0011] The beneficial effects of the utility model are:

[0012] 1. The base tube sheet and the tantalum alloy liner are fixed by tantalum nails in the non-tube area, and the tantalum alloy liner, tantalum nails and tantalum alloy heat exchange tubes are connected by flanging welding, which effectively improves the overall structural connection strength;

[0013] 2. Tantalum alloy heat exchange tubes are used for heat exchange tubes. Tantalum alloy pads are arranged between tantalum nails and base tube sheets to reduce the heat conduction during welding between the first flange and the second flange on the tantalum alloy liner and the tantalum nails and tantalum alloy heat exchange tubes, thereby improving welding efficiency and welding quality;

[0014] 3. A leak detection hole is provided in the weld between the base tube sheet and the tantalum alloy liner to facilitate inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model

[0016] Figure 2 for Figure 1 Enlarged diagram of the middle A part

[0017] Figure 3 for Figure 1 Enlarged diagram of middle part B

[0018] Figure 4 Schematic diagram of the connection between the heat exchange tube, the base tube sheet, and the tantalum alloy lining plate

[0019] Among them, 1-base tube sheet, 2-tantalum alloy lining plate, 3-tantalum nail, 4-tantalum alloy pad, 5-leak detection hole, 6-tantalum alloy heat exchange tube, 7-pad groove, 8-first flange, 9-second flange, 10-fixing hole. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0021] In the description of the utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the viewing direction or position relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0022] like Figure 1-Figure 4 The tube sheet lining structure for a tantalum alloy heat exchanger shown in the figure includes a base tube sheet 1, a tantalum alloy heat exchange tube 6 and a tantalum alloy lining plate 2. The tantalum alloy lining plate 2 is welded to the outer side of the base tube sheet 1, i.e., the shell side, and the non-tube-laying area between the base tube sheet 1 and the tantalum alloy lining plate 2 is fixedly connected by multiple groups of tantalum nails 3. A leak detection hole 5 is provided on the radial outer side of the base tube sheet 1.

[0023] Specifically, Figure 2 and Figure 3 As shown, the radial outer end of the tantalum alloy liner 2 is welded to the base tube sheet 1 by silver brazing, and a plurality of groups of mounting holes correspondingly distributed in the non-tube-laying area of ​​the base tube sheet 1 and the tantalum alloy liner 2 are provided, and the mounting holes are punched holes, and a pad groove 7 is provided at the punching hole of the base tube sheet 1, and a tantalum alloy pad 4 is provided in the pad groove 7, and a through hole for the tantalum nail 3 to pass through is provided on the tantalum alloy pad 4, and the tantalum alloy pad 4 is provided with a through hole for the tantalum nail 3 to pass through, and the tantalum nail 3 passes through the tantalum alloy liner 2 and the tantalum alloy pad 4 from the outside to the inside in turn and is fixedly connected with the mounting hole on the base tube sheet 1, and a first flange 8 is provided on the outer side of the mounting hole on the tantalum alloy liner 2, and the first flange 8 is welded to the tantalum nail 3, and the connection strength between the tantalum alloy liner 2 and the base tube sheet 1 is effectively improved by providing a plurality of groups of tantalum nails 3 and the welding relationship between the tantalum alloy liner 2 and the base tube sheet 1 and the tantalum nail 3.

[0024] like Figure 4 As shown, the heat exchange tube is a tantalum alloy heat exchange tube 6, a through hole for the tantalum alloy heat exchange tube 6 to pass through is provided on the base tube sheet 1, and a fixing hole 10 for the tantalum alloy heat exchange tube 6 to cooperate is provided on the tantalum alloy liner 2. The fixing hole 10 is also a punching hole and is provided with a second flange 9 distributed outward. The second flange 9 is welded and fixed to the outer end of the tantalum alloy heat exchange tube 6, and the length of the outer end of the tantalum alloy heat exchange tube 6 extending outward from the base tube sheet 1 is the same as the length of the second flange 9. In this embodiment, the length of the second flange 9 is 5 mm to reduce the heat conduction when the tantalum alloy heat exchange tube 6 is welded to the second flange, thereby improving the welding efficiency and welding quality.

[0025] In addition, the thickness of the tantalum alloy liner 2 is 0.6 mm, so as to reduce the deformation thinning rate of the first flange 8 and the second flange 9 when punching the tantalum alloy liner 2 to less than 3%, thereby improving the punching qualification rate.

[0026] In this embodiment, two groups of leak detection holes 5 are provided. The leak detection holes 5 are provided on the radial outer side of the base tube sheet 1 and are connected to the weld between the base tube sheet 1 and the tantalum alloy liner 2 .

[0027] In order to improve the leak detection effect of the tube sheet, the number of leak detection holes 5 is limited as follows: when the outer diameter of the tube sheet is ≤600mm, two groups of leak detection holes 5 are set and are symmetrically distributed; when 600mm<the outer diameter of the tube sheet ≤2000mm, four groups of leak detection holes 5 are set, and the four groups of leak detection holes 5 are not uniform along the circumferential direction of the tube sheet; when the outer diameter of the tube sheet is greater than 2000mm, eight groups of leak detection holes 5 are set and are evenly distributed along the circumferential direction of the tube sheet.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A tube sheet lining structure for a tantalum alloy heat exchanger, comprising a base tube sheet and a heat exchange tube, characterized in that: A tantalum alloy lining plate is welded on the shell side of the base tube sheet, and correspondingly distributed mounting holes are arranged between the base tube sheet and the tantalum alloy lining plate in the non-tube laying area. The two are fixedly connected by tantalum nails, and a pad groove is arranged on the surface of the base tube sheet. A tantalum alloy pad is arranged in the pad groove. The tantalum nail passes through the pad and is fixedly connected to the base tube sheet. The heat exchange tube is a tantalum alloy heat exchange tube.

2. The tube sheet lining structure for a tantalum alloy heat exchanger according to claim 1, characterized in that: The mounting hole on the tantalum alloy liner is provided with a first flange distributed toward the shell side, and the first flange is connected to the tantalum nail by welding.

3. The tube sheet lining structure for a tantalum alloy heat exchanger according to claim 1, characterized in that: The tantalum alloy lining plate is provided with a fixing hole for matching with the tantalum alloy heat exchange tube, the fixing hole is provided with a second flange distributed on the shell side, and the second flange is welded to the tantalum alloy heat exchange tube.

4. The tube sheet lining structure for a tantalum alloy heat exchanger according to claim 1, characterized in that: The thickness of the tantalum alloy liner is 0.6-0.8 mm.

5. The tube sheet lining structure for a tantalum alloy heat exchanger according to claim 3, characterized in that: The flange length between the tantalum alloy lining plate and the tantalum alloy heat exchange tube is 5 to 6 mm, and the two are sealed and welded.

6. The tube sheet lining structure for a tantalum alloy heat exchanger according to claim 1, characterized in that: A leak detection hole connected to the weld between the tantalum alloy liner and the base tube sheet is arranged on the radial outer side of the base tube sheet.

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