CN219301352U - Coiled pipe type heat exchanger - Google Patents

Abstract

The utility model discloses a coil pipe type heat exchanger, which relates to the field of heat exchangers and solves the problem of low heat exchange efficiency of the existing heat exchanger, and the technical scheme is as follows: comprises a heat exchange disc; the heat exchange disc comprises a first heat exchange tube and a second heat exchange tube; the first heat exchange tube and the second heat exchange tube are spiral in mosquito-repellent incense shape; the first heat exchange tube and the second heat exchange tube are combined into a mosquito-repellent incense disk shape; the center is communicated by an S-shaped pipe; the heat exchange disc is provided with a cold medium inlet and a cold medium outlet; the heat exchange cover is also included; the heat exchange disc is arranged in the heat exchange cover; the cold medium inlet and the cold medium outlet are arranged outside the heat exchange cover. The purposes of heat exchangers with the same height and higher heat exchange efficiency are achieved.

Description

Coiled pipe type heat exchanger

Technical Field

The utility model relates to a disc heat exchanger, in particular to a heat exchanger for boiler tail gas.

Background

A heat exchanger is a device that transfers a portion of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. A common heat exchanger is a spiral tube heat exchanger, which is arranged in a similar manner to a spring shape, the center distances of each layer are equal, and the distances between the layers are equal. In order to ensure that the medium outside the tube has enough flow velocity, a core tube needs to be added in the middle, so that the medium outside the tube has enough flow velocity, the waste of the volume of the central part is caused, the height of the coil tube is increased by spirally winding the single tube, the height or the length of the outer tube body is increased, and the material is increased.

Disclosure of Invention

The utility model aims to provide a coiled tube type heat exchanger, which increases the heat exchange efficiency of the heat exchanger under the condition of the same height; the heat exchanger height required to achieve the same heat exchange efficiency is lower.

The technical aim of the utility model is realized by the following technical scheme: a coil heat exchanger comprises a heat exchange plate; the heat exchange disc comprises a first heat exchange tube and a second heat exchange tube; the first heat exchange tube and the second heat exchange tube are spiral in mosquito-repellent incense shape; the first heat exchange tube and the second heat exchange tube are combined into a mosquito-repellent incense disk shape; the center is communicated by an S-shaped pipe; the heat exchange disc is provided with a cold medium inlet and a cold medium outlet; the heat exchange cover is also included; the heat exchange disc is arranged in the heat exchange cover; the cold medium inlet and the cold medium outlet are arranged outside the heat exchange cover.

From the basic formula of heat transfer, it can be seen that: in the process of cold and heat transfer under the same working condition, the lower the total heat transfer coefficient is, the larger the required heat exchange area is; whereas the higher the total heat transfer coefficient, the smaller the heat exchange area required. At present, the heat exchanger adopts spring-shaped spiral pipe cloth to replace the heat pipe, the total heat transfer is relatively low, and the heat pipe is required to be made of more materials, so that the designed product has large volume, high weight, large occupied area and inconvenient operation. Compared with the existing spring-shaped spiral tube type heat exchanger, the heat exchanger provided by the utility model has no space in the middle, and medium flows through gaps among the mosquito-repellent incense heat exchange tubes, so that a core barrel is not needed, and a good heat exchange effect can be achieved. The height of the heat exchanger can be reduced, and the materials required by the heat exchanger can be reduced.

Further, at least two heat exchange plates are provided; the heat exchange plates are stacked; a spacing maintaining plate is arranged between the heat exchange plates; the two adjacent layers of heat exchange plates relatively rotate for 45-90 degrees; the adjacent two layers of heat exchange plates are communicated.

Further, the upper layer heat exchange plate rotates 90 degrees clockwise relative to the lower layer heat exchange plate.

Further, the upper layer heat exchange plate rotates 90 degrees anticlockwise relative to the lower layer heat exchange plate.

Further, the heat exchange cover comprises a barrel, a divergent cover and a gas collecting cover; the heat exchange disc is arranged in the cylinder; the dispersing cover is arranged at the lower end of the cylinder; the diameter of the divergence cover gradually increases from bottom to top; the gas collecting hood is arranged at the upper end of the cylinder; the diameter of the gas collecting hood gradually becomes smaller from bottom to top; the cold medium inlet is arranged above the cold medium outlet.

Further, the flue gas inlet and the flue gas outlet are provided with flanges.

Drawings

FIG. 1 is a schematic view of an embodiment

FIG. 2 is a cross-sectional view of an embodiment

FIG. 3 is a schematic view of a plurality of heat exchange plates

FIG. 4 is a schematic view of a single heat exchange plate

FIG. 5 is a schematic view of a space maintaining plate

In the figure: 11. a cylinder; 12. a gas collecting hood; 13. a divergence cover; 21. a cold medium inlet; 22. a cold medium outlet; 23. a heat exchange plate; 231. a first heat exchange tube; 232. a second heat exchange tube; 24. 180-degree elbow; 25. bending the pipe; 26. an S-shaped pipe; 27. a pitch maintaining plate; 271. and a support groove.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly or indirectly connected to the other element, the "connection" is not limited to a fixed connection or a movable connection, and a specific connection manner should be determined according to a specific technical problem to be solved.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Examples:

a disc heat exchanger comprising a heat exchange shroud; a heat exchange disc 23 is arranged in the heat exchange cover; the heat exchange tray 23 includes a first heat exchange tube 231 and a second heat exchange tube 232; the first heat exchange tube 231 and the second heat exchange tube 232 are spiral in mosquito-repellent incense shape; the first heat exchange tube 231 and the second heat exchange tube are combined into a mosquito-repellent incense coil shape; the centers are communicated by an S-shaped pipe 26; the cold medium inlet 21 and the cold medium outlet 22 are arranged on the outer ring of the heat exchange disc 23, so that the cold medium can conveniently extend out of the heat exchange cover. Having at least two heat exchange plates 23, said heat exchange plates 23 being arranged in a stack; the width of the gap between the first heat exchange tube 231 and the second heat exchange tube 232 is 2 to 8 mm. A certain angle can be staggered between the two layers of heat exchange plates 23; alternatively, the setting mode may be 30 degrees, 45 degrees, 60 degrees, or 90 degrees.

In this embodiment, the upper heat exchange plate 23 of the heat exchange plate 23 is rotated 90 degrees counterclockwise relative to the lower heat exchange plate 23. The adjacent two layers are connected by an interlayer connecting pipe; the interlayer connecting pipe comprises an elbow 25 and a 180-degree elbow 24, and the elbow 25 is connected with the 180-degree elbow 24; the interlayer connecting pipes are respectively connected with the adjacent heat exchange plates 23. Through the arrangement, the interlayer connecting pipe blocks the larger gap part of the outer ring of the upper layer, and avoids the bias flow of the medium outside the pipe. In one possible embodiment, the upper heat exchanger plate 23 of the heat exchanger plate 23 is rotated clockwise by 90 degrees with respect to the lower heat exchanger plate 23. Through the arrangement, the gap between the first heat exchange tube 231 and the second heat exchange tube of the upper heat exchange disc 23 is just shielded by the first heat exchange tube 231 or the second heat exchange tube of the lower heat exchange disc 23; the circulation distance of the hot gas can be increased so that it can exchange heat with the heat exchange plate 23 more sufficiently. Through the arrangement, after the multi-layer heat exchange plates 23 are connected, liquid can flow through all the heat exchange plates 23 in one way in the pipeline, so that the heat exchange is fully performed.

Also comprises a space maintaining plate 27, and the space maintaining plate 27 is provided with a heat exchange tube supporting groove 271; the groove pitch of the support grooves 271 on the pitch holding plate 27 is equal to the gap distance of the first heat exchange tube 231 and the second heat exchange tube 232; the upper and lower sides of the space maintaining plate 27 are provided with heat exchange tube supporting grooves 271; the height of the space maintaining plate 27 is adapted to the gap distance between the adjacent heat exchange plates 23 so that it is satisfied, and the gap distance between the heat exchange plates 23 can be maintained by the space maintaining plate 27. The space maintaining plates 27 are made of a heat resistant material, and variations in the space between the heat exchange tubes and between the heat exchange plates 23 at high temperature, resulting in variations in the heat transfer coefficient, are avoided by the space maintaining plates 27.

The heat exchange cover comprises a cylinder 11, a divergent cover 13 and a gas collecting cover 12; the heat exchange disc 23 is arranged in the cylinder 11; the dispersing cover 13 is arranged at the lower end of the cylinder 11; the diameter of the divergence cover 13 gradually increases from bottom to top; the gas collecting hood 12 is arranged at the upper end of the cylinder 11; the diameter of the gas collecting channel 12 gradually decreases from bottom to top. And flanges are arranged on the flue gas inlet and the flue gas outlet. The cooling medium inlet 21 is disposed above the cooling medium outlet 22. The flue gas enters the heat exchanger through the dispersing cover 13, and is discharged out of the heat exchanger from bottom to top through the gas collecting cover 12. Since the cold medium inlet 21 passes through the heat exchange plates 23 from top to bottom in sequence, the cold medium can exchange heat with the flue gas fully.

The heat exchanger is used for being connected with a flue gas outlet channel of the boiler combustion chamber. The heat in the flue gas can be used for heating the medium. The waste of energy can be avoided.

Working principle:

after the flue gas enters the heat exchanger from the flue gas inlet flange, the heat fluid is dispersed and distributed over the whole cylinder through the dispersing cover 13, then the heat fluid is sequentially flushed into staggered mosquito coil layers, and after passing through the topmost layer, the heat fluid is collected by the gas collecting cover 12, and finally enters the downstream from the top heat fluid outlet flange; at the same time, the cold medium enters the heat exchange tube through the top cold medium inlet 21 tube, flows from top to bottom in sequence, exchanges heat with external hot fluid in the process, and finally enters the downstream through the cold medium outlet 22 flange. In the heat exchange process, the hot fluid flows out from the bottom to the top, and the temperature is gradually increased from high to low; the cold fluid flows from the top to the bottom, the temperature is gradually reduced to high, a complete ideal full countercurrent heat transfer model is formed, and the heat transfer efficiency and the heat transfer coefficient are improved to a great extent.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Claims (6)

1. A coil heat exchanger is characterized in that: comprises a heat exchange plate (23); the heat exchange plate (23) comprises a first heat exchange tube (231) and a second heat exchange tube (232); the first heat exchange tube (231) and the second heat exchange tube (232) are in mosquito-repellent incense spiral; the first heat exchange tube (231) and the second heat exchange tube are combined into a mosquito-repellent incense disk shape; the center of the middle part of the heat exchange disc is provided with an S-shaped pipe (26) for communicating the first heat exchange pipe with the second heat exchange pipe; the heat exchange plate (23) is provided with a cold medium inlet (21) and a cold medium outlet (22);

the heat exchange cover is also included; the heat exchange disc (23) is arranged in the heat exchange cover; the cold medium inlet (21) and the cold medium outlet (22) are arranged outside the heat exchange cover.

2. A coil heat exchanger according to claim 1, wherein: having at least two heat exchanger plates (23); the heat exchange plates (23) are stacked; a space maintaining plate (27) is arranged between the heat exchange plates (23); the two adjacent layers of heat exchange plates (23) relatively rotate for 45-90 degrees; the adjacent two layers of heat exchange plates (23) are communicated.

3. A coil heat exchanger according to claim 2, wherein: the upper layer heat exchange plate (23) rotates 90 degrees clockwise relative to the lower layer heat exchange plate (23).

4. A coil heat exchanger according to claim 2, wherein: the upper layer heat exchange plate (23) rotates 90 degrees anticlockwise relative to the lower layer heat exchange plate (23).

5. A coil heat exchanger according to claim 2, wherein: the heat exchange cover comprises a cylinder body (11), a divergent cover (13) and a gas collecting cover (12); the heat exchange disc (23) is arranged in the cylinder body (11); the divergence cover (13) is arranged at the lower end of the cylinder body (11); the diameter of the divergence cover (13) gradually increases from bottom to top; the flue gas inlet is arranged on the dispersing cover; the gas collecting hood (12) is arranged at the upper end of the cylinder body (11); the diameter of the gas collecting hood (12) gradually becomes smaller from bottom to top; the flue gas outlet is arranged on the gas collecting hood (12).

6. A coil heat exchanger according to claim 5, wherein: and flanges are arranged on the flue gas inlet and the flue gas outlet.

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