CN218994127U - Heat exchange structure, heat exchanger and desorption device - Google Patents

Abstract

The utility model relates to the technical field of heat exchange devices, and particularly discloses a heat exchange structure, a heat exchanger and a desorption device. The heat exchange structure comprises a frame and heat exchange pipes, wherein each heat exchange pipe comprises a plurality of first pipes and second pipes which are identical in structure, each of the first pipes and the second pipes are flat pipes, each of the first pipes and the second pipes are arranged side by side and are clung to each other on the side walls, one second pipe is arranged between the adjacent first pipes, each of the first pipes and each of the second pipes are perpendicular to the extending direction of the corresponding second pipe, each of the connecting strips is arranged at a corner of each of the heat exchange pipes, each of the connecting strips is identical to each of the extending directions of the heat exchange pipes, and each of the connecting strips is used for fixing the corresponding first pipes and the corresponding second pipes. Through setting up flat first pipeline and second pipeline to first pipeline and second pipeline are hugged closely side by side and are set up a second pipeline between setting up two first pipelines, make the medium heat transfer in first pipeline and the second pipeline more abundant.

Description

Heat exchange structure, heat exchanger and desorption device

Technical Field

The utility model relates to the technical field of heat exchange devices, in particular to a heat exchange structure, a heat exchanger and a desorption device.

Background

Part of industrial waste gas contains volatile organic compounds, and the waste gas can be discharged after desorption.

The waste gas firstly passes through the adsorbent to adsorb organic matters in the waste gas, and when the adsorbent reaches an adsorption threshold, the adsorbent needs to be desorbed, so that the organic matters are separated from the adsorbent, and the adsorbent can work again.

The organic matter in the adsorbent is usually desorbed using nitrogen, steam, air, or the like as a desorption medium. The traditional method is that the desorption medium is heated first to make the temperature of the desorption medium approach to the primary distillation temperature of the organic matters, then the organic matters adsorbed in the adsorbent are carried out by the desorption medium, and then the desorption medium is cooled, so that the organic matters carried by the desorption medium are condensed and separated out. And the desorption medium is heated again to carry the organics. The cold medium and the heat medium carrying the organic matters do not exchange heat in the flowing process, and more energy is consumed in the processes of heating the medium with lower temperature and cooling the heat medium with higher temperature.

The heat exchanger is typically arranged to exchange heat between the heat medium and the cold medium such that the energy required by the cooling means to cool the heat medium is reduced and the energy required by the heating means to heat the cold medium is reduced. However, the heat transfer time of the heat medium and the cold medium is short in the conventional heat exchanger such as a plate heat exchanger, that is, the heat transfer efficiency between the cold medium and the heat medium is low, and the energy saving effect of the heating device and the cooling device is not remarkable.

It can be seen that there is a need for improvements and improvements in the art.

Disclosure of Invention

In view of the shortcomings of the prior art, the utility model aims to provide a heat exchange structure, a heat exchanger and a desorption device, and aims to solve the problem that the desorption system with low heat exchange efficiency of cold and heat medium in the existing desorption system consumes excessive energy.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a heat exchange structure comprising:

a frame including a plurality of connection bars;

the heat exchange pipeline is arranged in the frame, the heat exchange pipeline comprises a plurality of first pipelines and second pipelines which are identical in structure, the first pipelines and the second pipelines are flat pipelines, the side by side and the side walls of the first pipelines are clung, one second pipeline is arranged between the adjacent first pipelines, the first pipelines are perpendicular to the extending direction of the second pipelines, the connecting strips are arranged at corners of the heat exchange pipeline, and the extending directions of the connecting strips are identical to those of the heat exchange pipeline.

Preferably, the ends of the connecting strips are flush with the end surfaces of the heat exchange tubes.

The utility model also discloses a heat exchanger, which comprises:

the shell is provided with a first inlet, a first outlet, a second inlet and a second outlet;

the heat exchange structures are arranged in the shell side by side, adjacent connecting strips of adjacent heat exchange pipelines are connected in a sealing mode, the connecting strips close to the shell are connected with the inner wall of the shell in a sealing mode, the end portions of the heat exchange pipelines are connected with the inner wall of the shell in a sealing mode, and two adjacent heat exchange structures and the inner wall of the shell enclose a buffer cavity;

a plurality of first pipelines on the heat exchange structure and buffer cavities communicated with the first pipelines form a first buffer heat exchange interval, and a plurality of second pipelines on the heat exchange structure and buffer cavities communicated with the second pipelines form a second buffer heat exchange interval;

the first inlet, the plurality of first buffer heat exchange sections which are sequentially communicated with each other and the first outlet are sequentially communicated with each other to form a wavy first flow passage;

the second inlet, a plurality of second buffer heat exchange sections which are communicated in sequence and the second outlet are communicated in sequence to form a wavy second flow passage, and the first flow passage is not communicated with the second flow passage.

Preferably, the heat exchange structure that a plurality of set up side by side constitutes the heat exchange unit, the heat exchange unit is provided with two at least, the heat exchange unit sets up side by side and its tip sealing connection in proper order.

Preferably, the first pipe is a rectangular pipe.

Preferably, the close contact surface of the first pipeline and the second pipeline is square.

Preferably, the outer wall of the shell is provided with a heat-insulating cover plate.

Preferably, flanges are arranged at the first inlet, the first outlet, the second inlet and the second outlet.

The utility model also discloses a desorption device which comprises the heat exchange structure or the heat exchanger.

Compared with the prior art, the utility model has the beneficial effects that:

according to the heat exchange structure provided by the utility model, the heat exchange pipeline comprising the first pipeline and the second pipeline is arranged on the frame, so that the heat exchange structure can be conveniently installed on other devices. Through setting up flat first pipeline and second pipeline to first pipeline and second pipeline are hugged closely side by side and are set up a second pipeline between setting up two first pipelines, make the medium heat transfer in first pipeline and the second pipeline more abundant. The first pipelines and the second pipelines are fixed into a whole through the vertical arrangement of the extending directions of the first pipelines and the second pipelines so that the connecting strips can be used for fixing the first pipelines and the second pipelines into a whole.

In addition, the end parts of the connecting strips are arranged to be level with the end surfaces of the heat exchange tubes, so that the heat exchange structure is tightly attached to other devices

The utility model also discloses a heat exchanger, wherein a plurality of heat exchange structures are arranged in the shell, and buffer cavities are formed between the adjacent heat exchange structures and the shell, so that flow rates of flow channels with different temperatures, which pass through heat exchange of a single heat exchange structure, are slowed down under the buffer of the buffer cavities. Under the effect of a plurality of heat exchange structures and the buffer cavity enclosed by the heat exchange structures and the inner wall of the shell, the flow rate of the medium entering the heat exchanger is gradually reduced, and under the condition of the reduced flow rate, the heat exchange of two mediums in the heat exchanger can be more sufficient.

In addition, through all setting up first pipeline and second pipeline as rectangular pipe, purchase or processing is all comparatively convenient. Through setting up the face of hugging closely of first pipeline and second pipeline into the square for heat transfer pipeline after first pipeline and the laminating of second pipeline is columnar pipeline, and then in the heat transfer structure of being convenient for installs the casing. Through setting up the heat preservation apron, reduce the heat transfer of medium and external world, and then make the heat transfer between the medium can fully reduce energy loss. Through setting up the flange for the heat exchanger is convenient with other equipment connection.

The utility model also discloses a desorption device which comprises the heat exchange structure or the heat exchanger and has all the advantages of the heat exchange structure or the heat exchanger.

Drawings

FIG. 1 is a schematic diagram of a heat exchange structure according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of the portion A of FIG. 1;

fig. 3 is a schematic structural diagram of an upper convex hull and a lower convex hull in a first pipe according to an embodiment of the present utility model;

FIG. 4 is a front view of a first conduit or a second conduit according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a first view structure of a heat exchanger according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a second view structure of a heat exchanger according to an embodiment of the present utility model;

FIG. 7 is a schematic cross-sectional view of FIG. 5;

fig. 8 is an enlarged view of the B part structure of fig. 7;

fig. 9 is an enlarged view of the C-section structure of fig. 7.

Description of main reference numerals: 10-heat exchange structure, 11-frame, 111-connecting strip, 12-heat exchange pipeline, 121-first pipeline, 1211-upper convex hull, 1212-lower convex hull, 122-second pipeline, 20-casing, 21-first inlet, 22-first outlet, 23-second inlet, 24-second outlet, 25-pit, 30-buffer chamber, 40-heat exchange unit, 50-flange.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the utility model will be further described with reference to the examples and the accompanying drawings.

Examples

When the industrial waste gas is desorbed, the desorption medium is heated to carry out the organic matters adsorbed by the adsorbent (the temperature of the desorption medium is close to the initial distillation temperature of the organic matters so that the organic matters are vaporized), and then the desorption medium is cooled to condense and separate out the organic matters. But the high-temperature desorption medium carrying the organic matters and the desorption medium not carrying the organic matters after cooling do not interfere with each other in the system (the two do not exchange heat).

When the cooled desorption medium flows back to the heating equipment for heating, the desorption medium is at a lower temperature at the moment, and if the desorption medium is heated to a temperature capable of carrying organic matters (the temperature of the desorption medium is close to the primary distillation temperature of the organic matters), a larger temperature difference exists, and the heating equipment needs to consume more energy. Similarly, the temperature of the desorption medium entering the condenser is higher, and more energy is consumed to cool the desorption medium and the organics until the organics precipitate.

Therefore, the utility model discloses a heat exchange structure, so that heat exchange can be carried out on a hot medium and a cold medium in the flowing process, and the energy saving purpose is further achieved.

Specifically, the heat exchange structure 10 includes a frame 11 and heat exchange tubes 12, and the heat exchange tubes 12 are disposed on the frame 11. The frame 11 includes a plurality of connection bars 111, and the connection bars 111 are generally disposed at corner positions of the heat exchange tubes 12 and have the same connection direction as the extension direction of the heat exchange tubes 12, so that the connection bars 111 can better restrain the heat exchange tubes 12. The heat exchange tube 12 includes a first tube 121 and a second tube 122 which are identical in structure, and the first tube 121 and the second tube 122 are each flat tubes. The first conduit 121 and the second conduit 122 are side by side and the side walls are disposed in close proximity. A second pipe 122 is disposed between two adjacent first pipes 121, that is, the first pipes 121 and the second pipes 122 are interposed. At this time, different media are introduced into the first and second pipelines 121 and 122, and the two media can exchange heat more efficiently when the first and second pipelines 121 and 122 are inserted. The first and second pipes 121 and 122 extend in a direction perpendicular to each other, and when the heat exchange structure 10 is connected to other devices, the distance between the openings of the first and second pipes 121 and 122 perpendicular to each other is maximized so that the heat exchange structure 10 communicates with the other devices.

Specifically, the flat tubes of the first tube 121 and the second tube 122 include various flat thin-walled tubes, such as rectangular tubes, or flat tubes with circular, quadrangular, pentagonal or other polygonal cross-sections, so that a larger heat exchange surface is provided between the first tube 121 and the second tube 122.

As shown in fig. 1 or 2, the first pipe 121 is a rectangular pipe which is easy to purchase. Since the first and second pipes 121 and 122 are identical in structure, the length of the second pipe 122 and the first pipe 121 should be identical at this time.

Preferably, the close-fitting surfaces of the first and second pipes 121 and 122 are square, and the corners of the first and second pipes 121 and 122 having openings facing each other are on a straight line, and the first and second pipes 121 and 122 are not provided with protrusions at one side of the openings thereof, so that the connection bar 111 is more convenient to connect the corners of the heat exchange pipe 12.

The connecting strip 111 can be made of angle steel, and the angle steel in the shape of L can be well attached to the corners of the heat exchange pipeline 12. The length of the connection strip 111 should be adapted to the length of the heat exchange tube 12, in which case the end of the connection strip 111 is flush with the first tube 121 and/or the second tube 122 at the end of the heat exchange tube 12, thereby facilitating the mounting of the heat exchange structure 10 to other devices.

In order to enable the heat exchange of the cold and hot media in the first and second pipes 121 and 122 sufficiently, an upper convex hull 1211 and a lower convex hull 1212 are generally provided on the inner walls of the first and second pipes 121 and 122, as shown in fig. 3 and 4. The front view in the first pipe 121 or the second pipe 122 is shown in fig. 4, and at this time, the upper convex hull 1211 and the lower convex hull 1212 cooperate to divide the first pipe 121 or the second pipe 122, so that the medium carrying the organic matters is uniformly divided into several parts when passing through the first pipe 121 or the second pipe 122, and heat exchange between the cold and hot media is more uniform.

As shown in fig. 5-7, the present utility model also discloses a heat exchange device, which comprises a casing 20 and a plurality of heat exchange structures 10 as described above arranged in the casing 20, and the heat exchange device can improve the heat exchange efficiency by arranging the plurality of heat exchange structures 10 in the casing 20.

Specifically, referring to fig. 7, the casing 20 is provided with a first inlet 21, a first outlet 22, a second inlet 23, and a second outlet 24. The heat exchange structure 10 is arranged in the shell 20 side by side, adjacent connection strips 111 of the adjacent heat exchange structure 10 are in sealing connection, the connection strips 111, which are close to the inner wall of the shell 20, of the heat exchange structure 10 are in sealing connection with the inner wall of the shell 20, the end parts of the heat exchange pipelines 12 are in sealing connection with the inner wall of the shell 20, and the adjacent heat exchange structure 10 and the inner wall of the shell 20 enclose the buffer cavity 30.

A plurality of first pipelines 121 on one heat exchange structure 10 and buffer cavities 30 communicated with the first pipelines form a first buffer heat exchange interval, and a plurality of second pipelines 122 on one heat exchange structure 10 and buffer cavities 30 communicated with the second pipelines form a second buffer heat exchange interval;

the first inlet 21, a plurality of first buffer heat exchange sections which are sequentially communicated and the first outlet 22 are sequentially communicated to form a wavy first flow passage; the second inlet 23, a plurality of second buffer heat exchange sections which are sequentially communicated with each other and the second outlet 24 are sequentially communicated with each other to form a wavy second flow passage, and the first flow passage is not communicated with the second flow passage.

In fig. 7, the solid line indicates the heat medium flow direction, and the broken line indicates the cold medium flow direction.

As shown in fig. 7, when the heat medium is introduced from the first inlet 21, the heat medium flows along the plurality of first buffer heat exchange sections, and the flow rate of the heat medium is slowed down every time it passes through one of the first buffer heat exchange sections. When the cooling medium is introduced from the second inlet 23, the cooling medium flows along the plurality of second buffer heat exchanging sections, and the flow rate of the cooling medium is reduced every time the cooling medium passes through one second buffer heat exchanging section.

Along with the slowing of the flow rates of the heat medium and the cold medium, the heat exchange time of the heat medium and the cold medium in the heat exchange device is prolonged, and the heat exchange efficiency of the heat exchange device is improved.

Further, for convenience of processing, the cabinet 20 is disposed in parallel with two sidewalls connected to the connection bar 111, and a line of a diagonal line of a close-facing surface of the square is perpendicular or parallel to the sidewalls of the cabinet 20. At this time, the medium flowing out of the first pipe 121 or the second pipe 122 moves the longest distance in the buffer chamber 30, the heat medium can be maximally decelerated in the first buffer heat exchange chamber, and the cold medium can be maximally decelerated in the second buffer heat exchange chamber. And further, the time of the heat medium and the cold medium in the heat exchange device is prolonged, so that the heat exchange is more sufficient.

A plurality of heat exchange structures 10 that set up side by side constitute a heat exchange unit 40, and heat exchange unit 40 can arrange side by side, has solved the limited defect of single heat exchange structure 10 process length, and then can greatly increased heat transfer device's heat transfer area, improves heat exchange efficiency.

The number of the first heat exchanging units 40 arranged in parallel is determined according to the actual production conditions, and the first heat exchanging units 40 may be arranged in two, three or more groups.

As shown in fig. 8, the adjacent connecting strips 111 are typically welded, so that the first buffer heat exchange cavity and the second buffer heat exchange cavity which are oppositely arranged can not be communicated.

As shown in fig. 9, the connection part between the casing 20 and the heat exchange structure 10 is generally provided with a recess, so that the connecting strip 111 can be well fixed in the recess, and the position stability of the heat exchange structure 10 is ensured.

The outer wall of the casing 20 is provided with a heat-insulating cover plate, so that heat exchange between the heat medium and the cold medium and the outside is avoided. At this time, heat exchange between the heating medium and the cooling medium is more sufficient, namely the temperature of the heating medium is reduced more, and the temperature of the cooling medium is increased more, so that the heating device and the cooling device consume less energy.

The heat-insulating cover plate can be one of a benzene plate, an extruded sheet or a rock wool plate.

Meanwhile, in order to facilitate the heat exchange device and connection into the system, flanges 50 are generally provided at the first inlet 21, the first outlet 22, the second inlet 23, and the second outlet 24. Other sheets may be attached to flange 50 to form elongated first inlet 21 and second outlet 24 as shown in fig. 6-8 to facilitate communication with other pipes.

The utility model also discloses a desorption device which comprises the heat exchange structure 10 or the heat exchanger and has all the advantages of the heat exchange structure 10 or the heat exchanger.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present utility model and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model.

Claims (10)

1. Heat transfer structure, its characterized in that includes:

a frame including a plurality of connection bars;

the heat exchange pipeline comprises a plurality of first pipelines and second pipelines which are identical in structure, the first pipelines and the second pipelines are flat pipelines, the first pipelines are arranged side by side and are clung to the side walls of the second pipelines, one second pipeline is arranged between the adjacent first pipelines, the first pipelines are perpendicular to the extending direction of the second pipelines, connecting strips are arranged at corners of the heat exchange pipelines, the connecting strips are identical in extending direction of the heat exchange pipelines, and the connecting strips are used for fixing the first pipelines and the second pipelines.

2. The heat exchange structure according to claim 1, wherein the inner walls of the first or second tubes are each provided with an upper convex hull and a lower convex hull.

3. The heat exchange structure according to claim 1, wherein the ends of the connection bars are flush with the end face of the heat exchange tube.

4. A heat exchanger, comprising:

the shell is provided with a first inlet, a first outlet, a second inlet and a second outlet;

the heat exchange structures according to claim 2 or 3, wherein the heat exchange structures are arranged in the shell side by side, adjacent connecting strips of adjacent heat exchange pipelines are in sealing connection, the connecting strips close to the shell are in sealing connection with the inner wall of the shell, the end parts of the heat exchange pipelines are in sealing connection with the inner wall of the shell, and two adjacent heat exchange structures and the inner wall of the shell enclose a buffer cavity;

a plurality of first pipelines on the heat exchange structure and buffer cavities communicated with the first pipelines form a first buffer heat exchange interval, and a plurality of second pipelines on the heat exchange structure and buffer cavities communicated with the second pipelines form a second buffer heat exchange interval;

the first inlet, the plurality of first buffer heat exchange sections which are sequentially communicated with each other and the first outlet are sequentially communicated with each other to form a wavy first flow passage;

the second inlet, a plurality of second buffer heat exchange sections which are communicated in sequence and the second outlet are communicated in sequence to form a wavy second flow passage, and the first flow passage is not communicated with the second flow passage.

5. The heat exchanger of claim 4, wherein a plurality of heat exchange structures are arranged side by side to form a heat exchange unit, at least two heat exchange units are arranged side by side, and the ends of the heat exchange units are sequentially connected in a sealing manner.

6. The heat exchanger of claim 4, wherein the first tube is a rectangular tube.

7. The heat exchanger of claim 6, wherein the surface of the first tube against the second tube is square.

8. The heat exchanger of claim 4, wherein the outer wall of the housing is provided with a heat retaining cover plate.

9. The heat exchanger of claim 4, wherein flanges are provided at the first inlet, the first outlet, the second inlet, and the second outlet.

10. A desorption apparatus comprising a heat exchange structure according to any one of claims 1 to 3 or a heat exchanger according to any one of claims 4 to 9.

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