Double-pipe heat exchanger

Abstract

The utility model belongs to heat exchange equipment technical field, concretely relates to a double -pipe heat exchange device, and the device includes: support, outside pipe is arranged in both sides of support, inner tube is coaxially covered and is arranged in the outside pipe, and the annular cavity for conveying cooling medium is formed between the inner tube and outside pipe, the opposite sides of support are equipped with first, second heat exchange unit respectively, and each heat exchange unit is by a plurality of series connection's outside pipe and a plurality of series connection's inner tube constitutes, the first, second heat exchange unit first end's outside pipe is provided with the liquid inlet that communicates with annular cavity, and the outer tube of end is provided with the liquid outlet that communicates with annular cavity, and, the inner tube of first end and end of first, second heat exchange unit is connected with the three -way pipe, and the intersection of three -way pipe is provided with three -way valve, to switch the flow direction of inner tube fluid.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat exchange equipment, and in particular relates to a shell-and-tube heat exchange device. Background Technology

[0002] Shell-and-tube cooling boxes, as a type of indirect heat exchange equipment, are widely used in the processes of chemical, petroleum, food, and pharmaceutical industries for cooling or condensing fluid media due to their simple structure, reliable operation, and strong adaptability.

[0003] In traditional series-connected shell-and-tube heat exchangers, all modules form a continuous flow channel. If any one of the tubes becomes blocked, severely scaled, or leaks, the entire heat exchange system must be shut down and emptied before maintenance can be performed. This can cause significant losses for industrial production lines that require continuous operation.

[0004] Therefore, how to solve the problem that existing shell-and-tube heat exchangers cannot be maintained without shutting down the system is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one shell-and-tube heat exchanger.

[0007] In a first aspect, embodiments of this disclosure provide a shell-and-tube heat exchanger, comprising: support; The outer tubes are located on both sides of the bracket; An inner tube is coaxially sleeved inside the outer tube, and an annular cavity for conveying cooling medium is formed between the inner tube and the outer tube; The support is provided with a first heat exchange unit and a second heat exchange unit on opposite sides, and each heat exchange unit is composed of multiple outer tubes connected in series and multiple inner tubes connected in series. The first heat exchange unit and the second heat exchange unit each have an outer tube at their beginning ends with a liquid inlet communicating with the annular cavity; and an outer tube at their end ends with a liquid outlet communicating with the annular cavity; and, The first heat exchange unit and the second heat exchange unit are connected to a three-way pipe at the beginning and end of the inner pipe. A three-way valve is provided at the intersection of the three-way pipe to switch the flow direction of the fluid in the inner pipe.

[0008] In one alternative embodiment, the three-way valve is a manual three-way ball valve or an electrically controlled three-way ball valve.

[0009] In one alternative implementation, the outer tubes are connected in series via flanges.

[0010] In one optional embodiment, a U-shaped bend is provided between adjacent inner pipes, and flanges are provided at both ends of the U-shaped bend; Adjacent inner pipes are connected in series via U-shaped bends and flanges.

[0011] In one alternative embodiment, the pipes of the first heat exchange unit are inclined, with an angle of 30° to 50° between them and the horizontal plane.

[0012] In one optional implementation, the tee pipe inlet located above the support is the feed inlet, and the tee pipe outlet located below the support is the discharge outlet.

[0013] Secondly, embodiments of this disclosure also provide a shell-and-tube heat exchanger, comprising: The first heat exchange unit includes multiple sleeve modules connected in series. Each sleeve module includes an inner tube and an outer tube arranged coaxially, and an annular cavity for conveying cooling medium is formed between the inner tube and the outer tube. The second heat exchange unit is arranged in parallel with the first heat exchange unit, and its structure is the same as that of the first heat exchange unit. The first heat exchange unit and the second heat exchange unit have an inlet port at the beginning of the outer tube that communicates with the annular cavity; and an outlet port at the end of the outer tube that communicates with the annular cavity. A three-way pipe is connected to the inner pipes at the beginning and end of the first heat exchange unit and the second heat exchange unit; A three-way valve is installed at the junction of the three-way pipe to switch the flow direction of the fluid in the inner pipe.

[0014] In one alternative embodiment, the three-way valve is a manual three-way ball valve or an electrically controlled three-way ball valve.

[0015] In one alternative implementation, the outer tubes are connected in series via flanges.

[0016] In one optional embodiment, a U-shaped bend is provided between adjacent inner pipes, and flanges are provided at both ends of the U-shaped bend; Adjacent inner pipes are connected in series via U-shaped bends and flanges.

[0017] The beneficial effect of this utility model is that the first heat exchange unit and the second heat exchange unit are connected in parallel through a three-way pipe. When the first heat exchange unit is working, the second heat exchange unit is in a standby state. When the first heat exchange unit needs to be repaired, the material can be directed to the second heat exchange unit by rotating the three-way valve, so that the first heat exchange unit can be repaired without stopping the machine.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] 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.

[0021] Figure 1 A perspective view of a shell-and-tube heat exchanger provided in an embodiment of this disclosure; Figure 2 A side view of a shell-and-tube heat exchanger provided in an embodiment of this disclosure; Figure 3 This is a cross-sectional view of the casing of a shell-and-tube heat exchanger provided in an embodiment of this disclosure.

[0022] In the picture: 100, Support; 200, Outer tube; 210, Liquid inlet; 220, Liquid outlet; 300, Inner tube; 400, Annular cavity; 500, First heat exchange unit; 600, Second heat exchange unit; 700, T-shaped pipe; 710, T-valve; 720, Feed inlet; 730, Discharge outlet; 800, Flange; 900, U-shaped bend. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions 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.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0026] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0029] Research has revealed the following drawbacks of existing technologies: In traditional series-connected shell-and-tube heat exchangers, all modules form a continuous flow channel. If any one of the tubes becomes blocked, severely scaled, or leaks, the entire heat exchange system must be shut down and emptied before maintenance can be performed. This can cause significant losses for industrial production lines that require continuous operation.

[0030] Based on the above research, this disclosure provides a shell-and-tube heat exchange device in which a first heat exchange unit and a second heat exchange unit are connected in parallel. When one of the heat exchange units needs to be repaired, the material flow channel is switched by a three-way valve, so that the heat exchange pipeline can be repaired without stopping the machine.

[0031] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] See Figure 1 and Figure 3 This disclosure provides a shell-and-tube heat exchange device, including: a support 100; several tubes are provided on both sides of the support 100, including an outer tube 200 and an inner tube 300; the inner tube 300 is coaxially sleeved inside the outer tube 200, and an annular cavity 400 is formed between the inner tube 300 and the outer tube 200; wherein, the inner tube 300 is used to transport materials, the annular cavity 400 is used to transport cooling medium, and the materials exchange heat with the cooling medium through the tube wall of the inner tube 300.

[0035] See Figure 1 Multiple outer tubes 200 on one side of the support 100 are connected in series, and multiple inner tubes 300 on the same side are connected in series, together forming a first heat exchange unit 500. Multiple outer tubes 200 on the other side of the support 100 are connected in series, and multiple inner tubes 300 on the same side are connected in series, together forming a second heat exchange unit 600. The first heat exchange unit 500 and the second heat exchange unit 600 have liquid inlets 210 and liquid outlets 220 at their beginning and end, respectively. The cooling medium enters the annular cavity 400 through the liquid inlet 210 and flows out through the liquid outlet 220 after heat exchange is completed.

[0036] See Figure 1 and Figure 2 The first heat exchange unit 500 and the second heat exchange unit 600 are both connected to a three-way pipe 700 at their beginning and end inner tubes 300. A three-way valve 710 is installed at the junction of the three-way pipes 700 to switch the flow direction of the fluid in the inner tubes 300. The first heat exchange unit 500 and the second heat exchange unit 600 are connected in parallel through the three-way pipe 700. When the first heat exchange unit 500 is working, the second heat exchange unit 600 is in a standby state. When the first heat exchange unit 500 needs maintenance, the material can be directed to the second heat exchange unit 600 by rotating the three-way valve 710, thus enabling maintenance of the first heat exchange unit 500 without shutting down the machine.

[0037] See Figure 1 In some embodiments, the three-way valve 710 is a manual three-way ball valve or an electrically controlled three-way ball valve.

[0038] See also Figure 1 In some embodiments, the outer pipes 200 are connected in series via flanges 800. A U-bend 900 is provided between adjacent inner pipes 300, with flanges 800 at both ends of the U-bend 900; two adjacent inner pipes 300 are connected in series via the U-bend 900 and flanges 800. This arrangement facilitates disassembly and assembly via flanges 800 when the heat exchange pipeline needs maintenance.

[0039] See also Figure 1 In some embodiments, the pipes of the first heat exchange unit 500 are inclined, with an angle of 30° to 50° between them and the horizontal plane, preferably 45°. The inclined pipes allow for rapid emptying of material from the pipes during maintenance of the first heat exchange unit 500.

[0040] See also Figure 1 In some embodiments, the inlet of the tee pipe 700 located above the support 100 is a feed inlet 720, and the outlet of the tee pipe 700 located below the support 100 is a discharge outlet 730.

[0041] See Figure 1 and Figure 3Some embodiments also provide a shell-and-tube heat exchange device, including: a first heat exchange unit 500, composed of multiple shell-and-tube modules connected in series, each shell-and-tube module including an inner tube 300 and an outer tube 200 arranged coaxially, with an annular cavity 400 formed between the inner tube 300 and the outer tube 200 for conveying a cooling medium; a second heat exchange unit 600, arranged in parallel with the first heat exchange unit 500, and having the same structure as the first heat exchange unit 500; both the first heat exchange unit 500 and the outer tube 200 at their beginning and end are provided with an inlet 210 and an outlet 220; a three-way pipe 700, communicating with the inner tube 300 at the beginning and end of the first heat exchange unit 500 and the second heat exchange unit 600; and a three-way valve 710, at the junction of the three-way pipe 700, used to switch the flow direction of the fluid in the inner tube 300.

[0042] In summary, this shell-and-tube heat exchanger connects the first heat exchange unit 500 and the second heat exchange unit 600 in parallel via a three-way pipe 700. When the first heat exchange unit 500 is working, the second heat exchange unit 600 is in a standby state. When the first heat exchange unit 500 needs maintenance, the material can be directed to the second heat exchange unit 600 by rotating the three-way valve 710, thus enabling maintenance of the first heat exchange unit 500 without shutting down the machine.

[0043] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 based on the specific circumstances.

[0044] 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 orientation or positional relationships, are based on the orientation or positional relationships 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, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0045] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0046] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0047] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A shell-and-tube heat exchanger, characterized in that, include: Bracket (100); The outer tube (200) is disposed on both sides of the bracket (100); An inner tube (300) is coaxially sleeved inside the outer tube (200), and an annular cavity (400) for conveying cooling medium is formed between the inner tube (300) and the outer tube (200). The support (100) has a first heat exchange unit (500) and a second heat exchange unit (600) on opposite sides respectively. Each heat exchange unit is composed of multiple outer tubes (200) connected in series and multiple inner tubes (300) connected in series. The first heat exchange unit (500) and the second heat exchange unit (600) have outer tubes (200) at their beginning ends with inlets (210) communicating with annular cavities (400); and outer tubes (200) at their ends have outlets (220) communicating with annular cavities (400); and, The first heat exchange unit (500) and the second heat exchange unit (600) have tee pipes (700) connected to their inner tubes (300) at the beginning and end. A three-way valve (710) is provided at the junction of the three-way pipe (700) to switch the flow direction of the fluid in the inner pipe (300).

2. The shell-and-tube heat exchanger as described in claim 1, characterized in that, The three-way valve (710) is a manual three-way ball valve or an electrically controlled three-way ball valve.

3. The shell-and-tube heat exchanger as described in claim 1, characterized in that, The outer tubes (200) are connected in series via flanges (800).

4. The shell-and-tube heat exchanger as described in claim 1, characterized in that, A U-shaped bend (900) is provided between adjacent inner pipes (300), and flanges (800) are provided at both ends of the U-shaped bend (900). The two adjacent inner tubes (300) are connected in series by a U-shaped bend (900) and a flange (800).

5. The shell-and-tube heat exchanger as described in claim 1, characterized in that, The pipes of the first heat exchange unit (500) are inclined, with an angle of 30° to 50° between them and the horizontal plane.

6. The shell-and-tube heat exchanger as described in claim 5, characterized in that, The inlet of the three-way pipe (700) located above the support (100) is the feed inlet (720), and the outlet of the three-way pipe (700) located below the support (100) is the discharge outlet (730).

7. A shell-and-tube heat exchanger, characterized in that, include: The first heat exchange unit (500) includes multiple sleeve modules connected in series. Each sleeve module includes an inner tube (300) and an outer tube (200) arranged coaxially. An annular cavity (400) for conveying cooling medium is formed between the inner tube (300) and the outer tube (200). The second heat exchange unit (600) is arranged in parallel with the first heat exchange unit (500), and its structure is the same as that of the first heat exchange unit (500); The first heat exchange unit (500) and the second heat exchange unit (600) have an outer tube (200) at the beginning end with an inlet (210) communicating with the annular cavity (400); and an outer tube (200) at the end with an outlet (220) communicating with the annular cavity (400). The three-way pipe (700) is connected to the inner pipe (300) at the beginning and end of the first heat exchange unit (500) and the second heat exchange unit (600); A three-way valve (710) is installed at the junction of the three-way pipe (700) to switch the flow direction of the fluid in the inner pipe (300).

8. The shell-and-tube heat exchanger as described in claim 7, characterized in that, The three-way valve (710) is a manual three-way ball valve or an electrically controlled three-way ball valve.

9. The shell-and-tube heat exchanger as described in claim 7, characterized in that, The outer tubes (200) are connected in series via flanges (800).

10. The shell-and-tube heat exchanger as described in claim 7, characterized in that, A U-shaped bend (900) is provided between adjacent inner pipes (300), and flanges (800) are provided at both ends of the U-shaped bend (900). The two adjacent inner tubes (300) are connected in series by a U-shaped bend (900) and a flange (800).

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