CN216694571U

CN216694571U - Shell-and-tube heat exchanger

Info

Publication number: CN216694571U
Application number: CN202123335732.0U
Authority: CN
Inventors: 孙诚刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-07
Anticipated expiration: 2031-12-28

Abstract

The present disclosure provides a shell and tube heat exchanger. The shell-and-tube heat exchanger includes: the shell is provided with a shell-side fluid inlet and a shell-side fluid outlet, and the opening of the basin-shaped structure faces the tube plate; the basin-like structure includes: lateral wall, riser and the pelvic floor of tube-shape, the normal direction of the optional position department of lateral wall and riser is on a parallel with the tube sheet place plane that basin column structure connects, the lateral wall encircle the riser and with riser formula structure as an organic whole, riser and tube sheet in close contact with support the tube sheet, lateral wall and tube sheet sealing contact, the pelvic floor links to each other with the lateral wall and prescribes a limit to the inner space of basin column structure, be equipped with tube side fluid entry and tube side fluid export on two basin column structures's the pelvic floor respectively. The tube plate of the shell-and-tube heat exchanger can be made to be relatively thin, so that the processing cost of the shell-and-tube heat exchanger is low, and meanwhile, the reliability of the tube plate is guaranteed by adding the basin-shaped structure.

Description

Shell-and-tube heat exchanger

Technical Field

The utility model belongs to the technical field of the heat exchanger, concretely relates to shell and tube heat exchanger.

Background

This section is intended to provide a background or context to the embodiments of the disclosure recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

The shell-and-tube heat exchanger is a common heat exchange device in petrochemical industry and other industries. Particularly in a high-temperature and high-pressure working environment, the application of a shell-and-tube heat exchanger is dominant. Shell and tube heat exchangers typically have a tube sheet holding the heat exchange tubes which serves to allow heat exchange between fluid inside the heat exchange tubes (i.e., tube side fluid) and fluid outside the heat exchange tubes (i.e., shell side fluid). The tube plate thickness of the shell-and-tube heat exchanger is usually designed to be very thick due to the very high working pressure of the shell-side fluid outside the heat exchange tubes. Taking a shell-and-tube heat exchanger with the diameter of 1 meter and the shell-side working pressure of 100 kilograms as an example, the thickness of the tube plate can reach 30 centimeters. When manufacturing the shell-and-tube heat exchanger, since the heat exchange tube needs to pass through the tube plate, a hole (hereinafter referred to as a heat exchange tube hole) needs to be drilled in the tube plate for the heat exchange tube to pass through, but too thick thickness of the tube plate causes the drilling operation of the tube plate to be labor-consuming and laborious.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a shell and tube heat exchanger.

The technical scheme adopted by the disclosure is as follows: a shell and tube heat exchanger comprising: the heat exchanger comprises a flat plate-shaped tube plate, a heat exchange tube, two basin-shaped structures and a shell, wherein the heat exchange tube penetrates through the tube plate and is fixed on the tube plate in a sealing mode, the two basin-shaped structures are fixed on the tube plate and are communicated with the heat exchange tube, the shell is connected with the tube plate and defines a shell pass space together with the tube plate, a shell pass fluid inlet and a shell pass fluid outlet are formed in the shell, and an opening of each basin-shaped structure faces the tube plate where the basin-shaped structure is located; the tub-like structure includes: the tube plate sealing device comprises a cylindrical side wall, a vertical plate and basin bottoms, wherein the normal directions of any positions of the side wall and the vertical plate are parallel to the plane where a tube plate connected with the basin-shaped structures is located, the side wall surrounds the vertical plate and is of an integrally formed structure with the vertical plate, the vertical plate is in close contact with the tube plate to support the tube plate, the side wall is in sealing contact with the tube plate, the basin bottoms are connected with the side wall to limit the inner space of the basin-shaped structures, and tube pass fluid inlets and tube pass fluid outlets are respectively arranged on the basin bottoms of the two basin-shaped structures.

In the shell-and-tube heat exchanger of the present disclosure, the tube sheet may be provided relatively thin, for example, with a 10 cm thick tube sheet, so that the process efficiency of drilling holes in the tube sheet can be improved. Because the pressure-bearing capacity of the thinner tube plate is limited, in order to enhance the pressure-bearing capacity and make up for the insufficient bearing capacity, a bearing basin-shaped structure is additionally arranged outside the tube plate. The tube plate is supported by the vertical plate and the side wall of the basin-shaped structure. Because the plate surfaces of the vertical plate and the side wall are vertical to the tube plate, and the vertical plate and the side wall are of an integral structure, when the vertical plate and the side wall are stressed in the direction vertical to the tube plate, the structures of the vertical plate and the side wall are very stable. This enables the risers and sidewalls to effectively support the tubesheet. Further, the larger the sizes of the vertical plates and the side walls in the direction perpendicular to the tube plate are, the better the supporting effect of the vertical plates and the side walls on the tube plate is. The shell-and-tube heat exchanger has the advantages of low manufacturing cost, low manufacturing process difficulty, labor saving and material saving. The basin-shaped structure can be used as a liquid inlet and outlet assembly of tube pass fluid, thereby achieving two purposes.

Drawings

FIG. 1 is a cross-sectional view of a shell and tube heat exchanger along line CC according to an embodiment of the disclosure.

Fig. 2 is a view of a partial structure of the shell-and-tube heat exchanger shown in fig. 1 in the a direction.

FIG. 3 is a cross-sectional view of the shell-and-tube heat exchanger shown in FIG. 1 taken along line BB.

11, 12 and a tube plate; 13. a housing; 14. a shell-side fluid inlet; 15. a shell-side fluid outlet; 211. a side wall; 212. a vertical plate; 213. a basin bottom; 214. a tube-side fluid inlet; 215. a tube-side fluid outlet; 216. an extension flange; 3. a fixed flange; 4. a bolt; 5. a heat exchange tube.

Detailed Description

It should be noted that, in the present disclosure, the embodiments and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1-3, the present disclosure provides a shell and tube heat exchanger. Fig. 1 shows a longitudinal cross-section of the shell-and-tube heat exchanger. Fig. 3 shows a transverse cross-section of the shell-and-tube heat exchanger, the cross-section being at the location of the basin structure. Figure 2 shows a view of one direction of the basin structure of the shell-and-tube heat exchanger. Only two heat exchange tubes are schematically shown in fig. 1.

The method comprises the following steps: tube sheets 11, 12 (typically in the form of flat plates), heat exchange tubes 5 passing through the

tube sheets

11, 12 and sealingly secured to the

tube sheets

11, 12, two basin-like structures secured to the

tube sheets

11, 12 and communicating with the heat exchange tubes 5, and a shell 13 connected to the

tube sheets

11, 12 and defining a shell-side space with the

tube sheets

11, 12, the shell 13 being provided with a shell-side fluid inlet 14 and a shell-side fluid outlet 15, the basin-like structures opening towards the

tube sheets

11, 12 in which they are located.

The

tube sheets

11, 12 should be sealed at the contact positions with the heat exchange tubes 5 to prevent leakage of the shell-side fluid. In particular, the

tube plates

11, 12 and the heat exchange tubes 5 can be fixedly connected in a sealing manner by welding, for example.

The basin-like structure "snaps" onto the

tube sheets

11, 12.

The basin-like structure includes: the tube-pass fluid flow meter comprises a cylindrical side wall 211, a vertical plate 212 and basin bottoms 213, wherein the normal directions of any positions of the side wall 211 and the vertical plate 212 are parallel to the planes of

tube plates

11 and 12 connected with basin-shaped structures, the side wall 211 surrounds the vertical plate 212 and is of an integrated structure with the vertical plate 212, the vertical plate 212 is in close contact with the tube plates to support the tube plates through the vertical plate 212, the side wall 211 is in sealing contact with the tube plates, the basin bottoms 213 are connected with the side wall 211 to limit the inner space of the basin-shaped structures, and the basin bottoms 213 of the two basin-shaped structures are respectively provided with a tube-pass fluid inlet 214 and a tube-pass fluid outlet 215.

The tube-side fluid flows from the tube-side fluid inlet 214 into a basin and then into the heat exchange tubes 5. The tube-side fluid discharged from the heat exchange tube 5 flows into the other basin and then flows out from the tube-side fluid outlet.

The tube-side fluid inlet 214 and the shell-side fluid outlet 215 are respectively arranged in the central region of the basin corresponding to the basin-shaped structure, which also ensures the symmetry of the overall appearance of the basin-shaped structure, so that the distribution of the internal stress of the basin-shaped structure is more uniform.

In the shell-and-tube heat exchanger of the present disclosure, the

tube sheets

11, 12 may be provided relatively thin, for example, with a tube sheet thickness of 10 centimeters. In this way, the efficiency of the process of drilling the

tube sheets

11, 12 can be improved. Because the pressure bearing capacity of the

thinner tube plates

11 and 12 is limited, in order to enhance the pressure bearing capacity of the

tube plates

11 and 12 and make up for the deficiency of insufficient bearing capacity of the

tube plates

11 and 12, bearing basin-shaped structures are additionally arranged outside the

tube plates

11 and 12. The

tube plates

11, 12 are supported by means of a basin-shaped vertical plate 212. Because the plate surfaces of the vertical plate 212 and the side wall 211 are perpendicular to the

tube plates

11 and 12, and the vertical plate 212 and the side wall 211 are an integral structure, when the vertical plate 212 and the side wall 211 are stressed in a direction perpendicular to the

tube plates

11 and 12, the structures of the vertical plate 212 and the side wall 211 are very stable. This enables the riser 212 to effectively support the

tube sheets

11, 12. Further, the larger the dimension of the vertical plate 212 and the side wall 211 in the direction perpendicular to the tube plate, the better the supporting effect of the vertical plate 212 and the side wall 211 on the tube plate is, and the increase of the material cost and the processing cost is not obvious. The shell-and-tube heat exchanger has the advantages of low manufacturing cost, low manufacturing process difficulty, labor saving and material saving. The basin-shaped structure can be used as a liquid inlet and outlet assembly of tube pass fluid, thereby achieving two purposes.

The vertical plate 212 and the side wall 211 in the above basin-shaped structure may be integrally formed by a casting process. Of course, the vertical plate 212, the side wall 211 and the basin bottom 213 may be integrally formed by a casting process.

In the embodiment shown in fig. 1 to 3, vertical plate 212 has a flat plate shape. In some variations, riser 212 can also be a curved plate, for example, riser 212 can be wavy in cross-section. This increases the contact area between the riser 212 and the

tube sheets

11, 12, thereby better supporting the

tube sheets

11, 12.

The orthogonal projections of the risers 212 on the plane of the

tube sheets

11, 12 should be distributed as uniformly as possible. This also makes the distribution of the support force received by the

tube sheets

11, 12 from the riser 212 more uniform. Thereby making the

tube sheets

11, 12 more resistant to deformation.

In the embodiment shown in fig. 1 to 3, the vertical plate 212 is composed of 2 flat plates crossed in a cross. Of course, the vertical plate 212 may be formed by 3 flat plates crossed in a shape like a Chinese character mi, and so on. Of course, only 1 riser 212 may be provided in a single basin.

In other words, optionally, at least one tub-shaped structure has a plurality of flat plate-shaped vertical plates, which intersect in the central region of the side wall and are distributed at equal angles. Namely, dihedral angles between the vertical plates are equal. This allows the support force received by the tube sheet to be distributed evenly.

In the embodiment shown in fig. 1 to 3, the side wall 211 has a circular cross-section, i.e. the side wall 211 has a circular cylindrical shape. Of course, the cross section of the sidewall 211 may be square, oval, or any other shape.

The shape, size and arrangement of the heat exchange tubes 5 are not limited in this disclosure. It should be understood that the position of the heat exchange tube 5 penetrating through the tube plate should be located in the gap between the side wall and the vertical plate, so that the heat exchange tube 5 can be communicated with the basin-shaped structure.

In the embodiment shown in fig. 1 to 3, the number of the tube plates is 2, the two

tube plates

11 and 12 are arranged oppositely, the shell 13 is cylindrical, the end of the side wall 211 contacting with the

tube plates

11 and 12 extends outwards along the radial direction of the side wall 211 to form an annular extension flange 216, the shell-and-tube heat exchanger further comprises an annular fixing flange 3, the fixing flange 3 surrounds the shell 13 and is fixed on the shell 13, and the side wall 211 is in sealing contact with the

tube plates

11 and 12 through bolts 4 penetrating through the extension flange 216 and the fixing flange 3.

Of course, to improve the sealing at the contact position of the side wall and the tube plate, a layer of rubber pad (not shown) can be added between the side wall and the tube plate.

In some possible variations, the bolts pass through the outwardly extending flanges of the two tubs and press the two outwardly extending flanges in a direction towards each other, thereby bringing the side walls of the two tubs into sealing contact with the tubesheet.

In some possible variants, the number of tube sheets in the shell-and-tube heat exchanger is 1, and the heat exchange tubes 5 are U-shaped. One free end of the heat exchange tube 5 extends out of the tube sheet to receive tube side fluid and the other free end of the heat exchange tube 5 extends out of the tube sheet to discharge tube side fluid. One basin is used to provide tube-side fluid to the heat exchange tubes 5 and to provide additional support for the tube sheets, and the other basin is used to receive tube-side fluid and to provide additional support for the tube sheets.

In the embodiment shown in fig. 1 to 3, the tub bottom 213 is integrally connected to the side wall 211, and the tub bottom 213 is integrally connected to the vertical plate 212. It will be readily appreciated that in the case of a shell-and-tube heat exchanger application, the basin floor 213 is also intended to be fixedly connected to other structures. The basin bottom 213 is connected with the side wall 211 and the vertical plate 212, so that the structural stability of the side wall 211 and the vertical plate 212 is enhanced, and the basin bottom 213 can provide auxiliary supporting force for the vertical plate 212 and the side wall 211.

In some possible variations, the basin 213 is secured to the side walls 211 by an assembly or welding process.

In some possible variations, the basin floor 213 is not in contact with the riser 212.

In the embodiment shown in fig. 1 to 3, the tub bottom 213 has a flat plate shape.

In some possible variations, the basin bottom 213 is in the shape of a hemisphere or other curved surface.

The embodiments in the disclosure are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The scope of the present disclosure is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present disclosure by those skilled in the art without departing from the scope and spirit of the present disclosure. It is intended that the present disclosure also encompass such modifications and variations as fall within the scope of the claims and their equivalents.

Claims

1. A shell and tube heat exchanger comprising: the heat exchanger comprises a flat plate-shaped tube plate, a heat exchange tube (5) penetrating through the tube plate and fixed on the tube plate in a sealing manner, two basin-shaped structures fixed on the tube plate and communicated with the heat exchange tube (5), and a shell (13) connected with the tube plate and defining a shell-side space together with the tube plate, wherein a shell-side fluid inlet (14) and a tube-side fluid outlet (215) are arranged on the shell (13), and the opening of the basin-shaped structures faces the tube plate where the basin-shaped structures are located; it is characterized in that the preparation method is characterized in that,

the basin-like structure includes: the tube plate support structure comprises a cylindrical side wall (211), a vertical plate (212) and a basin bottom (213), wherein the normal directions of any positions of the side wall (211) and the vertical plate (212) are parallel to the plane where a tube plate connected with the basin-shaped structure is located, the side wall (211) surrounds the vertical plate (212) and is of an integrally formed structure with the vertical plate (212), the vertical plate (212) is in close contact with the tube plate to support the tube plate, the side wall (211) is in sealing contact with the tube plate, the basin bottom (213) is connected with the side wall (211) to limit the inner space of the basin-shaped structure, and a tube pass fluid inlet (214) and a tube pass fluid outlet are respectively arranged on the basin bottoms (213) of the two basin-shaped structures.

2. A shell and tube heat exchanger according to claim 1, characterized in that the riser (212) is a flat plate.

3. A shell and tube heat exchanger according to claim 2, characterized in that at least one of the basin-like structures has a plurality of said flat plates, which intersect and are equiangularly distributed in a central area of the side wall (211).

4. A shell and tube heat exchanger according to claim 1, characterized in that the number of tube sheets is 2, two of the tube sheets are arranged oppositely, the shell (13) is cylindrical, the end of the side wall (211) contacting the tube sheets extends radially outwardly of the side wall (211) to form an annular extension flange (216), the shell and tube heat exchanger further comprises an annular fixing flange (3), the fixing flange (3) surrounds the shell (13) and is fixed to the shell (13), and the side wall (211) is brought into sealing contact with the tube sheets by bolts (4) passing through the extension flange (216) and the fixing flange (3).

5. A shell and tube heat exchanger according to claim 1, characterized in that the basin bottom (213) is of integral structure with the side wall (211), the basin bottom (213) being of integral structure with the riser (212).

6. A shell and tube heat exchanger according to claim 5, characterized in that the basin bottom (213) is flat.