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

A coil heat exchanger

technical field

The utility model relates to a plate heat exchanger, more specifically, it relates to a heat exchanger used for boiler tail gas.

Background technique

A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Common heat exchangers are spiral tube heat exchangers, which are arranged in a spring-like manner, with the center-to-center distance of each layer being equal, and the distance between layers being equal. In order to ensure that the medium outside the tube has a sufficient flow rate, it is necessary to add a core tube in the middle, so as to ensure that the medium outside the tube has a sufficient flow rate, resulting in a waste of the volume of the central part, and the spiral winding of the single tube also increases the coil height and increases the The height or length of the outer cylinder, resulting in increased material.

Utility model content

The purpose of the utility model is to provide a coil heat exchanger, which can increase the heat exchange efficiency of the heat exchanger under the condition of the same height; to achieve the same heat exchange efficiency, the height of the heat exchanger required is lower.

The above technical purpose of the utility model is achieved through the following technical solutions: a coil heat exchanger, including a heat exchange plate; the heat exchange plate includes a first heat exchange tube and a second heat exchange tube; the first heat exchange tube The tube and the second heat exchange tube are in the shape of a mosquito-repellent coil; the combination of the first heat-exchange tube and the second heat pipe is a mosquito-repellent coil; the center is connected by an S-shaped tube; the heat-exchange plate has a cold medium inlet and a cold medium outlet; it also includes The heat exchange cover; the heat exchange plate is arranged inside the heat exchange cover; the cold medium inlet and the cold medium outlet are arranged outside the heat exchange cover.

According to the basic formula of heat transfer, it can be known that in the process of cold and heat transfer under the same working conditions, the lower the total heat transfer coefficient, the larger the required heat transfer area; conversely, the higher the total heat transfer coefficient, the smaller the required heat transfer area. At present, heat exchangers mostly use spring-shaped spiral tubes to arrange heat exchange tubes. The total heat transfer is relatively low, resulting in the need for heat exchange tubes and more materials, so the designed products are large in size, high in weight, and occupy a large area. Inconvenient to operate. Compared with the existing spring-shaped spiral tube heat exchanger, the heat exchanger provided by the utility model has no space in the middle, and the medium flows through the gap between the mosquito coil heat exchange tubes, without using a core tube, and can also achieve good performance. heat transfer effect. The height of the heat exchanger can be reduced, and the materials required for the heat exchanger can be reduced.

Further, there are at least two heat exchange disks; the heat exchange disks are stacked; the distance maintaining plates are arranged between the heat exchange disks; the heat exchange disks of two adjacent layers are relatively rotated by 45 degrees to 90 degrees; The heat exchange plates are connected.

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

Further, the upper heat exchange disk rotates 90 degrees counterclockwise relative to the lower heat exchange disk.

Further, the heat exchange cover includes a cylinder, a divergence cover and a gas collection cover; the heat exchange plate is arranged in the cylinder; the divergence cover is arranged at the lower end of the cylinder; the diameter of the divergence cover gradually increases from bottom to top; the gas collection cover is set At the upper end of the cylinder; the diameter of the gas collecting hood gradually decreases from bottom to top; the inlet of the cold medium is set above the outlet of the cold medium.

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

Description of drawings

Fig. 1 is a schematic diagram of an embodiment

Figure 2 is a cross-sectional view of the embodiment

Figure 3 is a schematic diagram of multiple heat exchange plates

Figure 4 is a schematic diagram of a single heat exchange plate

Figure 5 is a schematic diagram of the spacing maintaining plate

In the figure: 11, cylinder body; 12, gas collection hood; 13, divergence hood; 21, cold medium inlet; 22, cold medium outlet; 23, heat exchange plate; 231, first heat exchange tube; 232, second exchange Heat pipe; 24, 180-degree elbow; 25, elbow; 26, S-shaped pipe; 27, distance maintaining plate; 271, support groove.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

It should be noted that when a component is referred to as being “fixed on” or “disposed on” another component, it may be directly on the other component or indirectly on the other component. When a component is said to be "connected" to another component, it may be directly or indirectly connected to the other component. The "connection" does not limit to a fixed connection or a movable connection. The specific connection method should be based on the specific technology to be solved. question to judge.

It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

Example:

A disc heat exchanger, the disc heat exchanger includes a heat exchange cover; a heat exchange disc 23 is arranged inside the heat exchange cover; the heat exchange disc 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 in the shape of a mosquito-repellent coil; the combination of the first heat-exchange tube 231 and the second tube heat-exchange tube is a mosquito-repellent coil; the center is connected by an S-shaped tube 26; the cold medium inlet is set in this way 21 and the cold medium outlet 22 are all located on the outer ring of the heat exchange plate 23, so as to be convenient to extend out of the heat exchange cover. There are at least two heat exchange plates 23, and the heat exchange plates 23 are stacked; the width of the gap between the first heat exchange tube 231 and the second heat exchange tube 232 is 2-8 mm. The two layers of heat exchange discs 23 can be staggered by a certain angle; optionally, the setting method can be 30 degrees, 45 degrees, 60 degrees, or 90 degrees.

In this embodiment, the upper heat exchange disk 23 of the heat exchange disk 23 rotates 90 degrees counterclockwise relative to the lower heat exchange disk 23 . The adjacent two layers are connected with interlayer connecting pipes; the interlayer connecting pipes include elbows 25 and 180 degree elbows 24, and the elbows 25 are connected with 180 degree elbows 24; Hot plate 23 is connected. Through the above arrangement, the connecting pipe between the layers blocks the large gap part of the outer ring of the upper layer to avoid the bias flow of the medium outside the pipe. In a possible embodiment, the upper heat exchange disk 23 of the heat exchange disk 23 rotates 90 degrees clockwise relative to the lower heat exchange disk 23 . Through the above arrangement, the gap between the first heat exchange tube 231 and the second heat pipe of the upper heat exchange plate 23 is just covered by the first heat exchange tube 231 or the second heat pipe of the lower heat exchange plate 23; The circulation distance enables it to exchange heat with the heat exchange disk 23 more fully. Through the above arrangement, after the multi-layer heat exchange disks 23 are connected, the liquid can flow through all the heat exchange disks 23 in one direction in the pipeline, so that the heat can be fully exchanged.

It also includes a distance maintaining plate 27, on which there are heat exchange tube support grooves 271; the distance between the support grooves 271 on the distance maintaining plate 27 is equal to the gap distance between the first heat exchange tube 231 and the second heat exchange tube 232 There are heat exchange tube support grooves 271 on the upper and lower sides of the space keeping plate 27; Gap distance between hot plates 23. The spacing maintaining plate 27 is made of heat-resistant material, and the spacing maintaining plate 27 prevents the variation of the spacing between the heat exchange tubes and the heat exchange discs 23 at high temperature, resulting in a change of the heat transfer coefficient.

The heat exchange cover includes a cylinder 11, a divergence cover 13 and a gas collection cover 12; a heat exchange plate 23 is arranged in the cylinder 11; a divergence cover 13 is arranged at the lower end of the cylinder 11; the diameter of the divergence cover 13 gradually changes from bottom to top Large; the gas collecting hood 12 is arranged on the upper end of the cylinder 11; the diameter of the gas collecting hood 12 gradually becomes smaller from bottom to top. The flue gas inlet and the flue gas outlet are provided with flanges. The cooling medium inlet 21 is disposed above the cooling medium outlet 22 . The flue gas enters the heat exchanger through the diffuser hood 13, and is exhausted from the heat exchanger by the gas collection hood 12 from bottom to top. Since the cold medium inlet 21 is at the top and passes through the heat exchange plates 23 sequentially from top to bottom, the cold medium can fully exchange heat with the flue gas.

The heat exchanger is used to connect with the flue gas outlet channel of the boiler combustion chamber. The heat in the flue gas can be used to heat the medium. Energy waste can be avoided.

working principle:

After the flue gas enters the heat exchanger from the flue gas inlet flange, the hot fluid is dispersed over the entire cylinder through the divergence cover 13, and then washed in turn into staggered mosquito coil layers, and after passing through the top layer, Then it is collected by the gas collecting hood 12, and finally enters the downstream from the top hot fluid outlet flange; at the same time, the cold medium enters the heat exchange tube from the top cold medium inlet 21, and flows from the top to the bottom in sequence. The heat exchange occurs in the hot fluid, and finally enters the downstream through the cold medium outlet 22 flange. In this heat exchange process, the hot fluid flows from the bottom to the top, and the temperature gradually changes from high to low; the cold fluid flows from the top to the bottom, and the temperature gradually changes from low to high, forming a completely ideal full counter heat transfer model, which is very large. Improve heat transfer efficiency and heat transfer coefficient to a certain extent.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. Those skilled in the art can make modifications without creative contribution to this embodiment as needed after reading this description, but as long as the utility model All claims are protected by patent law.

Claims (6)

1. A coil heat exchanger is characterized in that: it 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 The heat exchange tube (231) and the second heat exchange tube (232) are in the shape of a mosquito-repellent coil; the first heat exchange tube (231) and the second tube heat pipe are combined into a mosquito-repellent coil; the center of the heat exchange plate adopts an S-shaped tube (26 ) communicate the first heat exchange tube with the second heat exchange tube; the heat exchange plate (23) has a cold medium inlet (21) and a cold medium outlet (22); It also includes a heat exchange cover; the heat exchange plate (23) is arranged inside 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, characterized in that: it has at least two heat exchange disks (23); the heat exchange disks (23) are stacked; the heat exchange disks (23) A distance maintaining plate (27) is arranged between them; two adjacent layers of heat exchange disks (23) are relatively rotated by 45 degrees to 90 degrees; the two adjacent layers of heat exchange disks (23) are connected. 3. The coil heat exchanger according to claim 2, characterized in that: the upper heat exchange plate (23) rotates 90 degrees clockwise relative to the lower heat exchange plate (23). 4. The coil heat exchanger according to claim 2, characterized in that: the upper heat exchange plate (23) rotates 90 degrees counterclockwise relative to the lower heat exchange plate (23). 5. A coil heat exchanger according to claim 2, characterized in that: the heat exchange cover includes a cylinder (11), a diverging cover (13) and a gas collection cover (12); (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 smoke inlet is arranged on the divergence cover; The gas hood (12) is arranged on the upper end of the barrel (11); the diameter of the gas collecting hood (12) gradually decreases 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, characterized in that: flanges are provided on the flue gas inlet and flue gas outlet.

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