CN215598202U

CN215598202U - Overlapping heat exchanger

Info

Publication number: CN215598202U
Application number: CN202122270261.3U
Authority: CN
Inventors: 王健; 田伟; 曹占飞; 张文立
Original assignee: Beijing Petrochemical Engineering Co Ltd
Current assignee: Beijing Petrochemical Engineering Co Ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-01-21
Anticipated expiration: 2031-09-18

Abstract

The utility model discloses an overlapping heat exchange device, which relates to the technical field of heat exchangers, and comprises: the first heat exchanger is provided with a first shell, and a first port is formed in the first shell; a first connecting pipe connected with the first port, wherein the first connecting pipe at least has a first bending section and a second bending section; the second heat exchanger is arranged above the first heat exchanger and is provided with a second shell, and a second port is formed in the second shell; a second connection tube connected to the second port, the second connection tube having at least a third curved section and a fourth curved section; the flange unit comprises a first flange connected to the end part of the first connecting pipe and a second flange connected to the end part of the second connecting pipe, the first flange and the second flange are connected in a matched mode, and the end faces of the first flange and the second flange are parallel to the axis of the first heat exchanger. The possibility of leakage between the first connecting pipe and the second connecting pipe can be effectively reduced.

Description

Overlapping heat exchanger

Technical Field

The utility model relates to the technical field of heat exchangers, in particular to an overlapped heat exchange device.

Background

Heat exchange devices are equipment used in large numbers in petrochemical plants. In the design process, in order to save the occupied space, an overlapped heat exchange device is commonly used, that is, two heat exchangers are arranged in an overlapped mode in the vertical direction, and an upper heat exchanger is directly placed on a shell of a lower heat exchanger through a support. Due to the close distance between the two overlapping heat exchangers, the tubes, the shell side openings between the overlapping heat exchangers are typically connected directly opposite each other, as shown in the front view of fig. 1 and the left view of fig. 2. Compared with the common arrangement mode, the overlapping arrangement greatly reduces the energy consumption loss of the pipeline and is convenient to overhaul.

However, under the working conditions of multiple tube passes and large temperature drop, the temperature difference between the axial direction and the transverse direction of the overlapped heat exchange device is large, so that the thermal expansion values of the overlapped heat exchange device are different. In order to compensate for the additional stress caused by the temperature difference, the heat exchanger and its nozzle are deformed to absorb the axial and lateral displacement. Because the orificial rigidity of directly connecting is less than the heat exchanger body far away, directly the orificial deformation of connecting can be great, causes directly to connect the orificial sealing untight, easily takes place to open a mouth and leaks, can arouse conflagration or explosion even when serious. Therefore, a new overlapping type heat exchange device is needed to ensure the safe operation of the device and reduce the number of times of maintenance.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned drawbacks of the prior art, an embodiment of the present invention provides an overlapping type heat exchange device, which can effectively reduce the possibility of leakage between a first connection pipe and a second connection pipe.

The specific technical scheme of the embodiment of the utility model is as follows:

an overlapping heat exchange device, comprising:

the first heat exchanger is provided with a first shell, and a first port is formed in the first shell;

a first connecting pipe connected with the first port, the first connecting pipe at least having a first bending section and a second bending section;

a second heat exchanger disposed above the first heat exchanger, the second heat exchanger having a second housing with a second port thereon;

a second connection tube connected to the second port, the second connection tube having at least a third curved section and a fourth curved section;

the flange unit comprises a first flange connected to the end part of the first connecting pipe and a second flange connected to the end part of the second connecting pipe, the first flange is connected with the second flange in a matched mode, and the end faces of the first flange and the second flange are parallel to the axis of the first heat exchanger.

Preferably, the axis of the first heat exchanger and the axis of the second heat exchanger are parallel to the horizontal direction.

Preferably, the first connecting pipe is bent using a pipe material to form the first bending section and the second bending section; the second connecting pipe is bent using a pipe material to form the third bending section and the fourth bending section.

Preferably, the first adapter comprises: the first straight pipe section is connected with the first port, the first bent section is connected with the first straight pipe section, the second straight pipe section is connected with the first bent section, and the second bent section is connected with the second straight pipe section, wherein the first straight pipe section extends in the vertical direction, and the second straight pipe section extends in the horizontal direction.

Preferably, the second adapter comprises: the second port is connected with the first port, the second port is connected with the second port, the third curved section is connected with the third curved section, the fourth curved section is connected with the third curved section, the third straight section extends along the vertical direction, and the fourth straight section extends along the horizontal direction.

Preferably, a plurality of through holes are formed in each of the first flange and the second flange along the circumferential direction, a connecting piece is arranged in each through hole to connect the first flange and the second flange, and the first flange and the second flange can rotate relatively.

Preferably, the first port is located at an upper end of the first housing sidewall and the second port is located at a lower end of the second housing sidewall.

Preferably, the second straight tube section is gradually distant from the axis of the first housing in a direction from the end close to the first curved section to the end close to the second curved section.

Preferably, the fourth straight tube section is gradually away from the axis of the second shell in a direction from the end close to the third curved section to the end close to the fourth curved section.

Preferably, a support mechanism is arranged between the first heat exchanger and the second heat exchanger.

The technical scheme of the utility model has the following remarkable beneficial effects:

each connecting pipe in the overlapped heat exchange device is provided with at least two sections of bending sections, so that the possibility of deformation of the whole connecting structure is increased, the flexibility of the whole connecting structure is improved, the connecting structure has the capacity of absorbing axial displacement, transverse position and angular displacement, and the possibility of leakage of a flange unit at the connecting part between the first connecting pipe and the second connecting pipe can be reduced.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not so limited in scope. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the utility model as a matter of case.

FIG. 1 is a front view of a prior art overlapping heat exchange device;

FIG. 2 is a left side view of a prior art overlapping heat exchange device;

FIG. 3 is a side view of an overlapping heat exchange device according to an embodiment of the present application.

Reference numerals of the above figures:

1. a first heat exchanger; 11. a first housing; 12. a first port; 2. a first adapter tube; 21. a first straight pipe section; 22. a first curved section; 23. a second straight tube section; 24. a second curved section; 3. a second heat exchanger; 31. a second housing; 32. a second port; 4. a second adapter tube; 41. a third straight tube section; 42. a third curved section; 43. a fourth straight tube section; 44. a fourth curved section; 5. a first flange; 6. a second flange; 7. a connecting member; 8. a support mechanism; 9. a base.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the utility model in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to effectively reduce the possibility of leakage between the first connection pipe and the second connection pipe, an overlapped heat exchange device is proposed in the present application, fig. 3 is a side view of the overlapped heat exchange device in the embodiment of the present application, and as shown in fig. 3, the overlapped heat exchange device may include: the heat exchanger comprises a first heat exchanger 1, wherein the first heat exchanger 1 is provided with a first shell 11, and a first port 12 is formed in the first shell 11; a first connecting pipe 2 connected to the first port 12, the first connecting pipe 2 having at least a first curved section 22 and a second curved section 24; a second heat exchanger 3 arranged above the first heat exchanger 1, the second heat exchanger 3 having a second shell 31, the second shell 31 having a second port 32; a second connecting pipe 4 connected to the second port 32, the second connecting pipe 4 having at least a third curved section 42 and a fourth curved section 44; the flange unit comprises a first flange 5 connected to the end of the first connecting pipe 2 and a second flange 6 connected to the end of the second connecting pipe 4, the first flange 5 and the second flange 6 are connected in a matched mode, and the end faces of the first flange 5 and the second flange 6 are parallel to the axis of the first heat exchanger 1.

Each connecting pipe in the overlapped heat exchange device is provided with at least two sections of bending sections, so that the possibility of deformation of the whole connecting structure is increased, the flexibility of the whole connecting structure is improved, the connecting structure has the capacity of absorbing axial displacement, transverse position and angular displacement, and the possibility of leakage of a flange unit at the connecting part between the first connecting pipe 2 and the second connecting pipe 4 can be reduced.

As shown in fig. 3, the first heat exchanger 1 has a first casing 11, the first casing 11 having an axis, the axis of the first casing 11 extending in a horizontal direction. The second heat exchanger 3 is disposed above the first heat exchanger 1, the second heat exchanger 3 having a second casing 31, the second casing 31 having an axis, the axis of the second casing 31 extending in a horizontal direction. That is, the axis of the first heat exchanger 1 and the axis of the second heat exchanger 3 are parallel to the horizontal direction. Meanwhile, the axis of the first heat exchanger 1 is parallel to the axis of the second heat exchanger 3, i.e. the axis of the first heat exchanger 1 and the axis of the second heat exchanger 3 extend in the same direction.

As shown in fig. 3, a support mechanism 8 is provided between the first heat exchanger 1 and the second heat exchanger 3. The lower end of the supporting mechanism 8 is connected to the upper end of the side wall of the first heat exchanger 1, and the upper end of the supporting mechanism 8 is connected to the lower end of the side wall of the second heat exchanger 3. The support mechanism 8 may be plural and arranged in line in the axial direction of the first heat exchanger 1. Through the mode, the second heat exchanger 3 can be supported more stably.

As shown in fig. 3, a base 9 may be disposed at a lower end of a sidewall of the first heat exchanger 1, and the base 9 is disposed on the ground to support the first heat exchanger 1, so as to prevent the first heat exchanger 1 from shaking.

As shown in fig. 3, the first housing 11 has a first port 12 formed therein. The number of the first ports 12 may be multiple, two first ports 12 are communicated with the tube side of the first heat exchanger 1 to ensure the inlet and outlet of a tube side fluid, and two first ports 12 are communicated with the shell side of the first heat exchanger 1 to ensure the inlet and outlet of a shell side fluid.

As shown in fig. 3, the second housing 31 has a second port 32 formed therein. The number of the second ports 32 may be multiple, two second ports 32 are communicated with the tube side of the second heat exchanger 3 to ensure the inlet and outlet of the tube side fluid, and two second ports 32 are communicated with the shell side of the second heat exchanger 3 to ensure the inlet and outlet of the shell side fluid.

As shown in fig. 3, the first adapter 2 is connected to a first port 12, and the first port 12 may be located at an upper end of a sidewall of the first housing 11. The second nipple 4 is connected to a second port 32, and the second port 32 may be located at a lower end of a sidewall of the second housing 31. The number of the first connecting pipe 2 and the second connecting pipe 4 may be two, the first connecting pipe 2 is connected with the two first ports 12, and the second connecting pipe 4 is connected with the two second ports 32. The tube sides of the first heat exchanger 1 and the second heat exchanger 3 are communicated through the connection of a first connecting tube 2 and a second connecting tube 4. The shell-side communication between the first heat exchanger 1 and the second heat exchanger 3 is realized by the connection of the other first connecting pipe 2 and the other second connecting pipe 4.

As shown in fig. 3, the first socket 2 has at least a first curved section 22 and a second curved section 24. The second socket 4 has at least a third curved section 42 and a fourth curved section 44. The flange unit includes a first flange 5 connected to an end of the first nipple 2 and a second flange 6 connected to an end of the second nipple 4. The first flange 5 and the second flange 6 are connected in a matching mode, and the end faces of the first flange 5 and the second flange 6 are parallel to the axis of the first heat exchanger 1. The possibility of deformation of the whole connecting structure is increased in such a way, the flexibility of the whole connecting structure is improved, and the whole connecting structure has the capacity of absorbing axial displacement, transverse position and angular displacement, so that the possibility of leakage of the flange unit at the joint between the first connecting pipe 2 and the second connecting pipe 4 can be reduced. As a practical matter, the first bending section 22, the second bending section 24, the third bending section 42 and the fourth bending section 44 are bent by 90 degrees, so that the sealing end surfaces of the first flange 5 and the second flange 6 can be still parallel to the horizontal plane through the two bending sections, so as to realize the connection sealing of the two.

As shown in fig. 3, the first nipple 2 may include, as applicable: a first straight tube section 21 connected to the first port 12, a first curved section 22 connected to the first straight tube section 21, a second straight tube section 23 connected to the first curved section 22, a second curved section 24 connected to the second straight tube section 23, the first straight tube section 21 extending in a vertical direction and the second straight tube section 23 extending in a horizontal direction. Correspondingly, the second adapter 4 may also include: a third straight tube section 41 connected to the second port 32, a third curved section 42 connected to the third straight tube section 41, a fourth straight tube section 43 connected to the third curved section 42, a fourth curved section 44 connected to the fourth straight tube section 43, the third straight tube section 41 extending in a vertical direction and the fourth straight tube section 43 extending in a horizontal direction.

As shown in fig. 3, it is possible that the second straight tube section 23 is gradually away from the axis of the first housing 11 in a direction from the end near the first curved section 22 to the end near the second curved section 24. The fourth straight tube section 43 is gradually away from the axis of the second shell 31 in a direction from the end near the third curved section 42 to the end near the fourth curved section 44. Because the distance between the first heat exchanger 1 and the second heat exchanger 3 in the vertical direction is small, the positions of the flange units can be led out to the opposite side surfaces of the first heat exchanger 1 and the second heat exchanger 3 in the above mode, the first connecting pipe 2 and the second connecting pipe 4 can be conveniently connected together through the flange units, and the flange units are easy to realize centering; secondly, there is sufficient space between the first heat exchanger 1 and the second heat exchanger 3 to accommodate the first curved section 22, the second curved section 24, the third curved section 42 and the fourth curved section 44.

As shown in fig. 3, a plurality of through holes are opened in each of the first flange 5 and the second flange 6 along the circumferential direction, a connecting member 7 is disposed in each through hole to connect the first flange 5 and the second flange 6, and the first flange 5 and the second flange 6 can rotate relative to each other. The connecting member 7 may be a bolt, and the first flange 5 and the second flange 6 are fixed by cooperating with a nut.

As shown in fig. 3, the first adapter tube 2 may be bent using a tube material to form a first bent section 22 and a second bent section 24, as applicable. The second nipple 4 may be bent using a tube to form a third bent section 42 and a fourth bent section 44. In other possible embodiments, an elbow can be connected to the first connecting pipe 2, by means of which the first curved section 22 and the second curved section 24 are formed. Likewise, a bend can also be connected to the second connecting tube 4, by means of which bend a third bend 42 and a fourth bend 44 are formed.

The connection structure comprising the first connecting pipe 2, the second connecting pipe 4 and the flange unit, which is provided by the application, combines the existing space conditions, fully utilizes the natural bending (flexibility) of the connecting pipes to perform deformation coordination, and forms natural compensation on the structural design, so that the connection structure is formed into flexible connection between the first port 12 and the second port 32 of the overlapped heat exchange device, the additional force borne by the flange unit is further reduced, and the leakage risk of the flange unit can be reduced or eliminated.

Under the action of temperature difference of the overlapped heat exchange device, the positions of the first connecting pipe 2 and the second connecting pipe 4 can deviate to a certain extent, and each connecting pipe is provided with at least two sections of bending sections, so that the deformation possibility of the whole connecting structure is increased, the flexibility of the whole connecting structure is improved, and the connecting structure has the capacity of absorbing axial displacement, transverse position and angular displacement, the relative positions of the first flange 5 and the second flange 6 in the flange unit can be basically kept unchanged, namely, the bending deformation between the first flange 5 and the second flange 6 is converted into torsional deformation, the end faces with the sealing function can be still attached, the flange unit still keeps a good sealing state, and leakage caused by opening between the first flange 5 and the second flange 6 is avoided. In addition, the overlapped heat exchange device is simple and compact in structure, the vertical distance of the overlapped heat exchange device cannot be increased, and the overlapped heat exchange device has good economic performance.

Secondly, the connection structure provided by the application and comprising the first connecting pipe 2, the second connecting pipe 4 and the flange unit can better buffer the stress damage caused by mechanical vibration, earthquake acceleration and the like to the overlapping type heat exchange device, so that the overlapping type heat exchange device has better shock resistance and durability.

Finally, the connection structure comprising the first connecting pipe 2, the second connecting pipe 4 and the flange unit, which is provided by the application, does not change the connection position of the connecting pipes on the shell of the heat exchanger, does not influence the tube side structure of the heat exchanger, and ensures that the heat transfer calculation and the structural design of the heat exchanger are the same as those of the original common heat exchanger, so that the structure is easy to popularize in new equipment.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. An overlapping heat exchange device, comprising:

2. The overlapping heat exchange device of claim 1, wherein the axis of the first heat exchanger and the axis of the second heat exchanger are parallel to a horizontal direction.

3. The overlapping heat exchange device of claim 1, wherein the first nipple is bent using tubing to form the first curved section and the second curved section; the second connecting pipe is bent using a pipe material to form the third bending section and the fourth bending section.

4. The overlapping heat exchange device of claim 1, wherein the first nipple comprises: the first straight pipe section is connected with the first port, the first bent section is connected with the first straight pipe section, the second straight pipe section is connected with the first bent section, and the second bent section is connected with the second straight pipe section, wherein the first straight pipe section extends in the vertical direction, and the second straight pipe section extends in the horizontal direction.

5. The overlapping heat exchange device of claim 1, wherein the second nipple comprises: the second port is connected with the first port, the second port is connected with the second port, the third curved section is connected with the third curved section, the fourth curved section is connected with the third curved section, the third straight section extends along the vertical direction, and the fourth straight section extends along the horizontal direction.

6. The overlapped heat exchange device of claim 1, wherein the first flange and the second flange are each opened with a plurality of through holes along a circumferential direction, and a connector is provided in the through holes to realize connection of the first flange and the second flange, and the first flange and the second flange can rotate relatively.

7. The overlapping heat exchange device of claim 1, wherein the first port is located at an upper end of the first shell sidewall and the second port is located at a lower end of the second shell sidewall.

8. The overlapping heat exchange device of claim 4, wherein the second straight tube section is progressively further from the axis of the first shell in a direction approaching one end of the first curved section to approaching one end of the second curved section.

9. The overlapping heat exchange device of claim 5, wherein the fourth straight section is progressively further from the axis of the second shell in a direction approaching one end of the third curved section to approaching one end of the fourth curved section.

10. The overlapping heat exchange device of claim 1, wherein a support mechanism is disposed between the first heat exchanger and the second heat exchanger.