Self-adaptive backflow prevention heat exchanger

Abstract

The utility model provides a self-adaptive anti-backflow heat exchanger which comprises a collecting barrel A, a heat exchange pipe network, a collecting barrel B, an inlet and an outlet, the collecting barrel A is located above the heat exchanger, the collecting barrel B is located below the heat exchanger, the heat exchange pipe network is located between the collecting barrel A and the collecting barrel B, and the collecting barrel A and the collecting barrel B are connected in series through a middle pipe cavity. According to the heat exchanger, the problem of main medium reverse flow caused by external fluid disturbance or pressure fluctuation is thoroughly solved, and efficient heat exchange is achieved.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and in particular to an adaptive anti-backflow heat exchanger. Background Technology

[0002] This invention addresses the technical deficiencies of existing heat exchange devices. In traditional shell-and-tube heat exchangers, the fluid medium achieves indirect heat conduction exchange through counter-current flow between the tube side and the shell side. However, the main medium flowing within the tube side is prone to turbulence due to external fluid disturbances or pressure fluctuations, leading to a reverse backflow phenomenon in the main medium that has already participated in heat exchange. This backflow behavior creates local temperature field interference, specifically manifested as the low-temperature section of the main medium that has completed energy transfer being re-mixed into the high-temperature input section under turbulent action. This disrupts the stability of the temperature gradient on both sides of the tube wall, and consequently significantly weakens the heat transfer coefficient through thermal boundary layer disturbance, ultimately causing an exponential decline in the overall heat exchange efficiency. Summary of the Invention

[0003] According to an objective of the present invention and in response to the problems raised in the background, the present invention provides an adaptive anti-backflow heat exchanger, comprising a collection tank A, a heat exchange pipe network, and a collection tank B. The collection tank A has an inlet on its right side, and the collection tank B has an outlet on its left side. The collection tank A is located above the heat exchanger, and the collection tank B is located below the heat exchanger. The heat exchange pipe network is located between the collection tank A and the collection tank B, and the collection tank A and the collection tank B are connected in series through a central tube cavity. The components of the heat exchanger are fixed together by welding to prevent leakage.

[0004] Furthermore, the heat exchange network is composed of multiple heat exchange tubes arranged in parallel to form a mesh structure.

[0005] Furthermore, the heat exchange tube has a periodically hook-shaped curved structure.

[0006] Furthermore, the heat exchange tubes are welded together in a staggered arrangement and their internal cavities are interconnected.

[0007] Furthermore, the collection tank A is located at the top of the heat exchange pipeline network.

[0008] Furthermore, the collection tank B is located at the lower part of the heat exchange pipeline network.

[0009] Furthermore, the inlet and outlet are located on both sides of the heat exchanger.

[0010] Furthermore, the heat exchanger is at a certain angle to the horizontal plane, preferably 30° to 90°.

[0011] This invention provides an adaptive anti-backflow heat exchanger. The main medium flows downwards within the pipe, while the auxiliary medium passes through the heat exchange network from left to right. During the flow, heat is transferred from the main medium to the auxiliary medium through the pipe wall of the heat exchange network. Because the heat exchange tubes have a periodic hook-shaped curved structure and are welded in a staggered arrangement with interconnected internal cavities, they can only flow in one direction. The main medium will not experience backflow due to external fluid disturbances or pressure fluctuations. This prevents the low-temperature section of the main medium, which has already completed energy transfer, from being re-mixed into the high-temperature input section under turbulent flow, thus disrupting the stability of the temperature gradient on both sides of the pipe wall. Consequently, the heat transfer coefficient is significantly weakened through thermal boundary layer disturbance, ultimately leading to an exponential decline in the overall heat exchange efficiency, thereby improving the heat exchange efficiency. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0014] Figure 2 This is a cross-sectional view of the heat exchange tube in an embodiment of the present invention, showing the forward flow.

[0015] Figure 3 This is a cross-sectional view of the heat exchange tube in a reverse flow configuration according to an embodiment of the present invention.

[0016] In the diagram: 1. Main medium; 2. Auxiliary medium; 3. Flow direction of main medium; 4. Collection tank B; 5. Heat exchanger network; 6. Collection tank A; 7. Inlet; 8. Outlet; 9. Heat exchanger tube. Detailed Implementation

[0017] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0019] Example 1

[0020] like Figure 1 As shown, an adaptive anti-backflow heat exchanger includes a collection tank A (6), a heat exchange network (5), and a collection tank B (4). The collection tank A (6) is located above the heat exchanger, and the collection tank B (4) is located below the heat exchanger. The heat exchange network (5) is located between the collection tank A (6) and the collection tank B (4). The collection tank A (6) and the collection tank B (4) are connected in series through a central tube. The components of the heat exchanger are fixed together by welding to prevent leakage.

[0021] When the present invention is working normally, the main medium (1) first flows into the collection tank A (6) through the inlet (7), and flows into the collection tank B (4) along the heat exchange network (5) composed of heat exchange tubes (9) in the collection tank A (6), and finally flows out from the outlet (8); at the same time, the auxiliary medium (2) passes through the heat exchange network (5) from left to right to realize the transfer of heat. Since the inlet (7) and outlet (8) are distributed on both sides of the heat exchanger, the medium (1) flows in the same direction and the heat is exchanged evenly.

[0022] like Figure 2 When the medium (1) flows from top to bottom, if the main medium (1) is a gas and it is an exothermic process, as the temperature of the main medium (1) decreases, the water vapor it contains will continuously precipitate into water droplets. At this time, the precipitated water droplets flow down the inner cavity of the pipe wall under the action of gravity and can be discharged smoothly. On the contrary, if the main medium (1) flows from bottom to top, it will affect the precipitation of water. The precipitated water droplets will flow from the low temperature zone into the high temperature zone under the action of gravity. After absorbing heat in the high temperature zone, they will vaporize again, affecting the conduction and exchange of heat and reducing the heat exchange efficiency.

[0023] like Figure 3 As shown, the main medium (1) flowing inside the heat exchange tube (9) is prone to turbulence due to external fluid disturbances or pressure fluctuations, resulting in a reverse backflow phenomenon of the main medium (1) that has participated in heat exchange. Due to the structural characteristics of the heat exchange tube (9), the reverse-flowing main medium (1) will... Figure 3The A, B, C, and D regions shown form a counterflow, which prevents the flow of fluid and eventually causes the medium (1) to stop completely. This prevents the low-temperature section of the main medium (1) that has completed energy transfer from being re-mixed into the high-temperature input section under the action of turbulence, which disrupts the stability of the temperature gradient on both sides of the pipe wall. Consequently, the heat transfer coefficient is significantly weakened through thermal boundary layer disturbance, which ultimately leads to an exponential decline in the overall heat exchange efficiency and improves the heat exchange efficiency.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adaptive anti-backflow heat exchanger, characterized in that, The system includes a collection tank A, a heat exchange pipe network, a collection tank B, an inlet, and an outlet. The collection tank A has an inlet on its right side, and the collection tank B has an outlet on its left side. The collection tank A is located above the heat exchanger, and the collection tank B is located below the heat exchanger. The heat exchange pipe network is located between the collection tanks A and B, and the collection tanks A and B are connected in series through a central tube. The various components of the heat exchanger are fixed together by welding to prevent leakage.

2. The adaptive anti-backflow heat exchanger according to claim 1, characterized in that, The heat exchanger network consists of multiple heat exchanger tubes arranged in parallel to form a mesh structure.

3. The adaptive anti-backflow heat exchanger according to claim 1, characterized in that, The heat exchange tube has a periodic, hook-shaped curved structure.

4. The adaptive anti-backflow heat exchanger according to claim 1, characterized in that, The heat exchange tubes are welded together in a staggered arrangement, and their internal cavities are interconnected.

5. An adaptive anti-backflow heat exchanger according to claim 1, characterized in that, The inlet and outlet are located on both sides of the heat exchanger.

6. The adaptive anti-backflow heat exchanger according to claim 1, characterized in that, The heat exchanger is at an angle of 30°-90° to the horizontal plane.

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