Circulating cooling water system and operation method

Abstract

The invention discloses a circulating cooling water system and an operation method, the circulating cooling water system comprises a heat exchanger for heat exchange of a process medium and a water return pipeline for cooling water circulation, and the water return pipeline is provided with at least one cooling acceleration pipe section; the cooling accelerating pipe section comprises a main pipeline extending in the fluid direction and at least one set of wing-shaped branches connected to the main pipeline in parallel. The flow resistance of the wing-shaped branches is higher than that of the main pipeline; media in the main pipeline and media in the wing-shaped branches are separated at an upstream shunting point and converge again at a downstream confluence point, so that micro-acceleration of fluid is achieved at the confluence position, and the heat dissipation surface area is increased through the wing-shaped branches. The system is upgraded and reformed based on an original circulating cooling water operation and treatment system, additional arrangement of a pump or external power is not needed, cooling and micro acceleration of circulating cooling water are synchronously achieved through simple and effective structural optimization, and the operation effect of the whole circulating cooling water is improved.

Description

Technical Field

[0001] This application generally relates to the field of heat exchange technology. More specifically, this application relates to a circulating cooling water system; further, to a method of operating a circulating cooling water system. Background Technology

[0002] In industries such as chemical, power, and metallurgy, circulating cooling water systems are critical infrastructure for ensuring the safe, stable, and efficient operation of process units. Their core function is to transfer excess heat from the process medium to the cooling water via heat exchangers. The heated cooling water is then cooled by cooling towers and other facilities before being recycled.

[0003] In actual operation, especially under high temperature or high load conditions in summer, existing systems often face two major challenges: First, high ambient temperature or limited heat dissipation capacity makes it difficult to effectively reduce the return water temperature of the circulating cooling water, directly affecting the heat exchange efficiency of the next cycle; second, after flowing through complex pipe networks and heat exchange equipment, the cooling water experiences energy loss due to frictional and local resistance, causing the circulation velocity to gradually decrease. This reduced velocity not only weakens the convective heat transfer coefficient within the heat exchanger, further deteriorating the heat exchange effect, but may also exacerbate the risk of scaling and deposits in the pipes, creating a vicious cycle.

[0004] To address these issues, existing technologies typically employ a cooling and acceleration strategy. Cooling primarily relies on open / closed cooling towers, air coolers, or industrial refrigeration units to enhance heat dissipation. However, these methods have limitations. For instance, open cooling towers suffer from high water consumption and are prone to water pollution; closed cooling towers and refrigeration units, on the other hand, have drawbacks such as high initial investment and high operating energy consumption.

[0005] Acceleration is typically achieved by adding or speeding up the circulating water pumps in the pipeline. This directly increases additional energy consumption and equipment maintenance costs.

[0006] In view of this, there is an urgent need to provide a circulating cooling water system and operation method that is simpler, more economical, and energy-saving, thereby improving energy efficiency and operational economy. Summary of the Invention

[0007] In order to at least solve one or more of the technical problems mentioned above, this application proposes a simple and efficient circulating cooling water system and operation method in several aspects.

[0008] In a first aspect, this application provides a circulating cooling water system, including a heat exchanger for exchanging heat with a process medium and a return water pipeline for circulating cooling water. The return water pipeline is provided with at least one cooling-accelerating section. The cooling-accelerating section includes a main pipe extending along the fluid direction and at least one set of finned branches connected in parallel to the main pipe. The finned branches are configured with a flow resistance higher than that of the main pipe. The media in the main pipe and the finned branches separate at an upstream branching point and rejoin at a downstream confluence point, thereby achieving micro-acceleration of the fluid at the confluence point and increasing the heat dissipation surface area through the finned branches.

[0009] In some embodiments, multiple sets of the main pipe and finned branch structures are arranged sequentially along the fluid flow direction within the cooling and accelerating pipe section.

[0010] In some embodiments, a cooling acceleration pipe section includes a main pipe extending in the fluid direction and two sets of finned branches connected in parallel to the main pipe.

[0011] In some embodiments, the two sets of wing-shaped branches are arranged opposite to or staggered on the main pipeline.

[0012] In some embodiments, the two sets of wing-shaped branches include a first wing-shaped branch and a second wing-shaped branch; the first wing-shaped branch and the main pipeline have a first branch point and a first confluence point; the second wing-shaped branch and the main pipeline have a second branch point and a second confluence point; the second confluence point is located between the first branch point and the first confluence point.

[0013] In some embodiments, the two sets of wing-shaped branches include a first wing-shaped branch and a second wing-shaped branch; the first wing-shaped branch and the main pipe have a first branch point and a first confluence point; the second wing-shaped branch and the main pipe have a second branch point and a second confluence point; the second confluence point is located at a predetermined interval between the first branch points.

[0014] In some embodiments, the wing-shaped branch includes an arc segment and a straight segment connected in sequence; wherein the arc segment is located upstream of the straight segment.

[0015] In some embodiments, the two ends of the cooling acceleration pipe section are detachably connected to the rest of the return water pipe via flanges.

[0016] In some embodiments, the cooling acceleration pipe section is installed near the return water outlet of the heat exchanger.

[0017] In a second aspect, this application provides an operation method for a circulating cooling water system, applied to the circulating cooling water system described above. The method includes the following steps: allowing heated cooling water from a heat exchanger to enter a cooling acceleration section in the return water pipeline; within the cooling acceleration section, allowing cooling water to flow into a main pipeline and a finned branch with higher flow resistance at each grouping point; cooling water flowing through the finned branch being cooled by extending the flow path and increasing the heat dissipation surface area; and re-merging the faster-flowing cooling water in the main pipeline and the slower-flowing cooling water in the finned branch at a downstream confluence point, utilizing the higher momentum of the fluid from the main pipeline to eject and propel the fluid from the finned branch, thereby achieving a slight acceleration of the overall flow rate.

[0018] Through the circulating cooling water system provided above, this embodiment of the application, by setting a cooling acceleration pipe section based on the original circulating cooling water system's return water pipeline, eliminates the need for significant reconstruction of the original system. This approach offers the advantages of simplicity and ease of implementation while effectively controlling modification costs. Simultaneously, because the finned branch is configured with higher flow resistance than the main pipeline, its unique structure significantly increases the heat dissipation surface area of ​​the circulating cooling water, thereby achieving efficient cooling. Furthermore, by setting upstream branching points and downstream confluence points, the media in the main pipeline and the finned branch can smoothly complete the separation and re-merging. Utilizing the difference in fluid resistance between the two, the solution achieves micro-acceleration of the circulating cooling water without the need for additional pumps or external power, further improving the overall circulation performance and heat exchange efficiency. Attached Figure Description

[0019] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0020] Figure 1 A schematic diagram of the circulating cooling water system according to an embodiment of this application is shown; Figure 2 A schematic diagram of the cooling acceleration pipe section according to an embodiment of this application is shown; Figure 3 A schematic diagram of the cooling acceleration pipe section according to an embodiment of this application is shown; Figure 4 A schematic diagram of the cooling acceleration pipe section according to an embodiment of this application is shown; Figure 5 A schematic diagram of the cooling acceleration pipe section according to an embodiment of this application is shown.

[0021] In the diagram: 100, Circulating cooling water system; 101. Heat exchanger; 102. Return water pipeline; 1021, Cooling and Accelerating Pipe Section; 1022, Main Pipeline; 1023, Fin-shaped Branch; 1023-1, First Fin-shaped Branch; 1023-2, Second Fin-shaped Branch; 1024, Branch Point; 1025, Merging Point. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0025] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0026] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2As shown, in some embodiments, this application provides a circulating cooling water system 100, including a heat exchanger 101 for exchanging heat with a process medium and a return water pipeline 102 for circulating cooling water. The return water pipeline 102 is provided with at least one cooling acceleration section 1021. The cooling acceleration section 1021 includes a main pipeline 1022 extending along the fluid direction and at least one set of finned branches 1023 connected in parallel to the main pipeline 1022. The finned branches 1023 are configured with a flow resistance higher than that of the main pipeline 1022. The media in the main pipeline 1022 and the finned branches 1023 separate at an upstream branching point 1024 and rejoin at a downstream confluence point 1025, thereby achieving micro-acceleration of the fluid at the confluence and increasing the heat dissipation surface area through the finned branches 1023.

[0028] In this application, the circulating cooling water system 100 includes a heat exchanger 101 for heat exchange treatment of the process medium, and a return water pipe 102 providing a channel for the circulating flow of cooling water. Additionally, at least one cooling acceleration pipe section 1021 is provided on the return water pipe 102. Specifically, the cooling acceleration pipe section 1021 consists of a main pipe 1022 extending along the fluid flow direction, and at least one set of finned branch pipes 1023 connected in parallel with the main pipe 1022, wherein the finned branch pipes 1023 are configured with a flow resistance higher than that of the main pipe 1022. During system operation, the circulating cooling medium in the main pipe 1022 and the finned branch pipes 1023 separates at an upstream branching point 1024, and then rejoins at a downstream confluence point 1025. Utilizing the flow resistance difference between the main pipe 1022 and the finned branch pipes 1023, a micro-acceleration effect on the circulating cooling water is achieved at the confluence point. Meanwhile, the finned branch 1023's structural design increases the heat dissipation surface area of ​​the circulating cooling water, thereby achieving the cooling purpose. This system is an upgrade of the existing circulating cooling water operation and treatment system, requiring no additional pumps or external power. Through simple and effective structural optimization, it simultaneously achieves cooling and slight acceleration of the circulating cooling water, improving the overall operating effect of the circulating cooling water.

[0029] The proposed solution, by setting up a cooling acceleration pipe section 1021 based on the original circulating cooling water system 100 return water pipe 102, eliminates the need for significant reconstruction of the original system. This approach offers the advantages of simplicity and ease of implementation while effectively controlling modification costs. Simultaneously, because the finned branch 1023 is configured with a higher flow resistance than the main pipe 1022, its unique structure significantly increases the heat dissipation surface area of ​​the circulating cooling water, thereby achieving efficient cooling. Furthermore, by setting up an upstream branch point 1024 and a downstream confluence point 1025, the media in the main pipe 1022 and the finned branch 1023 can smoothly complete the separation and re-merging. Utilizing the difference in fluid resistance between the two, the solution achieves micro-acceleration of the circulating cooling water without the need for additional pumps or external power, further improving the overall circulation performance and heat exchange efficiency.

[0030] In one specific implementation, the cooling and accelerating pipe section 1021 contains a plurality of combinations of the main pipe 1022 and the finned branch 1023 arranged sequentially along the fluid flow direction.

[0031] In this application, the cooling acceleration pipe section 1021 is an upgraded version of the original circulating cooling water return pipe, with multiple sets of main pipes 1022 and finned branch pipes 1023 arranged sequentially along the fluid flow direction. Each set of combined structures follows the unidirectional flow micro-acceleration principle of a Tesla valve. The finned branch pipe 1023 is wing-shaped and connected in parallel with the main pipe 1022. Its flow resistance is higher than that of the main pipe 1022. The fluid splits into two paths at the upstream branching point 1024 of each set of combined structures, flowing through the main pipe 1022 and the finned branch pipe 1023 respectively, and then re-merges at the downstream confluence point 1025.

[0032] This solution, through the sequential arrangement of multiple sets of this combined structure, not only further expands the heat dissipation surface area of ​​the circulating cooling water and enhances the cooling effect, but also utilizes the fluid resistance difference between the main pipe 1022 and the finned branch 1023 in each set of structure to continuously achieve micro-acceleration of the circulating cooling water, effectively compensating for the problems of slowed flow rate and increased water temperature of the circulating cooling water after heat exchange in the original system, thereby significantly improving the overall operating effect of the circulating cooling water.

[0033] In some embodiments, one section of the cooling and accelerating pipe segment 1021 includes a main pipe 1022 extending along the fluid direction and two sets of finned branches 1023 connected in parallel to the main pipe 1022. The two sets of finned branches 1023 are arranged opposite to each other or staggered on the main pipe 1022.

[0034] In this application, a cooling and accelerating pipe section 1021 includes a main pipe 1022 extending along the fluid flow direction, and two sets of finned branch pipes 1023 connected in parallel with the main pipe 1022. To adapt to different field application scenarios, the two sets of finned branch pipes 1023 can be arranged in a relative or staggered manner on the main pipe 1022. This flexible arrangement does not change the overall architecture of the original system and can make full use of space. The two sets of finned branch pipes 1023 include a first finned branch pipe 1023-1 and a second finned branch pipe 1023-2; the first finned branch pipe 1023-1 and the main pipe 1022 have a first branch point and a first confluence point; the second finned branch pipe 1023-2 and the main pipe 1022 have a second branch point and a second confluence point; the second confluence point is located between the first branch point and the first confluence point. The two sets of wing-shaped branches 1023 include a first wing-shaped branch 1023-1 and a second wing-shaped branch 1023-2; the first wing-shaped branch 1023-1 and the main pipe 1022 have a first branch point and a first confluence point; the second wing-shaped branch 1023-2 and the main pipe 1022 have a second branch point and a second confluence point; the second confluence point is located at a preset interval between the first branch points.

[0035] It is worth noting that the two sets of wing-shaped branches 1023 in this scheme include a first wing-shaped branch 1023-1 arranged on one side of the main pipeline 1022 and a second wing-shaped branch 1023-2 arranged on the opposite side. The first wing-shaped branch 1023-1 connects to the main pipeline 1022 through a first branch point and merges with the main pipeline 1022 through a downstream first confluence point. Correspondingly, the second wing-shaped branch 1023-2 connects to the main pipeline 1022 through a second branch point and merges with the main pipeline 1022 through a downstream second confluence point.

[0036] like Figure 3 As shown, when the two sets of finned branches 1023 are arranged opposite each other, the first branch point and the second branch point are at the same or substantially the same longitudinal position in the axial direction of the main pipe 1022. Simultaneously, the first confluence point and the second confluence point are also at the same or substantially the same longitudinal position in the axial direction of the main pipe 1022. This symmetrical arrangement contributes to a balanced flow field distribution and allows for a more compact structure.

[0037] It is understandable that when the first wing-shaped branch 1023-1 and the second wing-shaped branch 1023-2 are arranged in a staggered manner, multiple implementation methods are possible. In one specific implementation method, such as Figure 4As shown, the first wing-shaped branch 1023-1 connects to the main pipeline 1022 through a first branch point and rejoins the main pipeline 1022 through a first downstream confluence point; the second wing-shaped branch 1023-2 connects to the main pipeline 1022 through a second branch point and rejoins the main pipeline 1022 through a second downstream confluence point. In this embodiment, the second confluence point is located between the first branch point and the first confluence point along the fluid flow direction.

[0038] In another implementation, such as Figure 5 As shown, the first wing-shaped branch 1023-1 connects to the main pipeline 1022 through a first branch point and merges with the main pipeline 1022 through a first downstream confluence point; the second wing-shaped branch 1023-2 connects to the main pipeline 1022 through a second branch point and merges with the main pipeline 1022 through a second downstream confluence point. The second confluence point is located along the axial direction of the main pipeline 1022 between the first branch point and the first confluence point, maintaining a certain distance from both. This arrangement allows for more efficient flow disturbance and heat dissipation within a limited pipeline length.

[0039] In one specific implementation, the wing-shaped branch 1023 includes an arc-shaped segment and a straight segment connected in sequence; wherein the arc-shaped segment is located upstream of the straight segment.

[0040] In this application, the finned branch 1023 is composed of an arc-shaped segment and a straight segment connected sequentially along the fluid flow direction, with the arc-shaped segment located upstream of the straight segment. This design, by using a finned branch 1023 structure consisting of an upstream arc-shaped segment and a downstream straight segment connected sequentially, achieves the beneficial effects of synergistically guiding flow, optimizing resistance, and enhancing heat dissipation within a limited space. Specifically, the upstream arc-shaped segment guides the fluid to a smooth direction and moderately increases flow disturbance, which is beneficial for heat transfer to the pipe wall; the downstream straight segment provides a stable and continuous heat dissipation path for the fluid and reduces unnecessary local resistance losses. This allows the branch to maintain reasonable pressure loss and heat dissipation efficiency while having a higher overall flow resistance than the main pipe 1022.

[0041] In one specific implementation, the two ends of the cooling acceleration pipe section 1021 are detachably connected to the rest of the return water pipe 102 via flanges.

[0042] In this application, the cooling acceleration pipe section 1021 is a key structure formed by upgrading and modifying the original circulating cooling water return pipe. Its two ends are detachably connected to the rest of the return pipe 102 via flanges. This flange connection design eliminates the need for significant modifications to the original return pipe 102, perfectly aligning with the core characteristics of this solution—simplicity and ease of implementation—and effectively controlling modification costs. Simultaneously, the detachable nature of the flange connection precisely meets the needs for subsequent disassembly, cleaning, and maintenance, avoiding maintenance inconveniences caused by fixed pipe structures. This ensures that the cooling acceleration pipe section 1021 can stably and continuously perform its cooling and micro-acceleration functions, providing strong support for the efficient operation of the overall circulating cooling water system 100.

[0043] In one specific implementation, the cooling acceleration pipe section 1021 is installed near the return water outlet of the heat exchanger 101.

[0044] In the scheme of this application, the cooling acceleration pipe section 1021 is installed close to the return water outlet of the heat exchanger 101. Those skilled in the art will understand that placing the cooling acceleration pipe section 1021 here allows the high-temperature, low-flow-rate cooling water that has just completed heat exchange to enter the modified pipe section immediately. With the help of the main pipe 1022 and the finned branch 1023 structure designed based on the Tesla valve principle within the pipe section, the cooling water quickly increases the heat dissipation surface area through the finned branch 1023 to achieve cooling. At the same time, the difference in flow resistance between the main pipe 1022 and the finned branch 1023 is used to achieve micro-acceleration.

[0045] The installation method provided by this solution, which is close to the return water outlet, can accurately address key issues of the cooling water after heat exchange and intervene in a timely manner to prevent the water temperature from rising further and the flow rate from continuously decreasing, thereby more efficiently ensuring the heat exchange efficiency and operating effect of the overall circulating cooling water system 100.

[0046] In some embodiments, this application provides an operation method for a circulating cooling water system, applied to the circulating cooling water system described above. The method includes the following steps: allowing heated cooling water from heat exchanger 101 to enter a cooling acceleration section 1021 in the return water pipe 102; within the cooling acceleration section 1021, allowing cooling water to flow into the main pipe 1022 and the finned branch 1023 with higher flow resistance at each branch flow point 1024; the cooling water flowing through the finned branch 1023 is cooled by extending the flow path and increasing the heat dissipation surface area; the cooling water flowing faster in the main pipe 1022 and the cooling water flowing slower in the finned branch 1023 are re-merged at a downstream confluence point 1025, utilizing the higher momentum of the fluid from the main pipe 1022 to eject and propel the fluid from the finned branch 1023, thereby achieving a slight acceleration of the overall flow rate.

[0047] In this application, a method for operating a circulating cooling water system is provided. This method can be applied to any of the aforementioned circulating cooling water systems 100, and includes the following process: the heated cooling water from the heat exchanger 101 first enters the cooling acceleration section 1021 in the return water pipe 102; within this section, the cooling water enters the main pipe 1022 and the finned branch 1023 with higher flow resistance at each group dispersal point 1024; the cooling water flowing through the finned branch 1023 is effectively cooled due to its extended path and increased heat dissipation surface area; at the same time, the cooling water with a faster flow rate in the main pipe 1022 and the cooling water with a slower flow rate in the finned branch 1023 re-merge at the downstream confluence point 1025, and with the help of the higher momentum of the fluid from the main pipe 1022, it generates an entraining and pushing effect on the fluid from the finned branch 1023, thereby achieving a slight acceleration of the overall flow rate of the system.

[0048] The proposed solution achieves a synergistic effect of simultaneously cooling the circulating cooling water and slightly accelerating the system flow rate without relying on external power by distributing the fluid according to the flow resistance difference at the branch point 1024, extending the path to enhance heat dissipation at the finned branch 1023, and using momentum ejection to achieve re-acceleration at the confluence point 1025. This method fully utilizes the dynamic characteristics of the fluid itself, organically integrating heat dissipation and acceleration processes into the same passive structure, thereby significantly reducing operating energy consumption and maintenance complexity while improving system heat exchange efficiency.

[0049] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A circulating cooling water system (100), comprising a heat exchanger (101) for exchanging heat with a process medium and a return water pipeline (102) for circulating cooling water, characterized in that, At least one cooling acceleration pipe section (1021) is provided on the return water pipe (102). The cooling and acceleration pipe section (1021) includes a main pipe (1022) extending along the fluid direction and at least one set of finned branches (1023) connected in parallel to the main pipe (1022). The wing-shaped branch (1023) is configured to have a higher flow resistance than the main pipe (1022); The medium in the main pipe (1022) and the finned branch (1023) are separated at the upstream branch point (1024) and rejoin at the downstream confluence point (1025), thereby achieving micro-acceleration of the fluid at the confluence point and increasing the heat dissipation surface area through the finned branch (1023).

2. The circulating cooling water system (100) according to claim 1, characterized in that, The cooling and accelerating pipe section (1021) is arranged with multiple sets of the main pipe (1022) and finned branch (1023) in sequence along the fluid flow direction.

3. The circulating cooling water system (100) according to claim 2, characterized in that, One section of the cooling and accelerating pipe section (1021) includes a main pipe (1022) extending in the fluid direction and two sets of wing-shaped branches (1023) connected in parallel to the main pipe (1022).

4. The circulating cooling water system (100) according to claim 3, characterized in that, The two sets of wing-shaped branches (1023) are arranged opposite to each other or staggered on the main pipeline (1022).

5. The circulating cooling water system (100) according to claim 4, characterized in that, The two sets of wing-shaped branches (1023) include a first wing-shaped branch (1023-1) and a second wing-shaped branch (1023-2); The first wing-shaped branch (1023-1) and the main pipeline (1022) have a first branch point and a first confluence point; the second wing-shaped branch (1023-2) and the main pipeline (1022) have a second branch point and a second confluence point; the second confluence point is located between the first branch point and the first confluence point.

6. The circulating cooling water system (100) according to claim 4, characterized in that, The two sets of wing-shaped branches (1023) include a first wing-shaped branch (1023-1) and a second wing-shaped branch (1023-2); The first wing-shaped branch (1023-1) and the main pipeline (1022) have a first branch point and a first confluence point; the second wing-shaped branch (1023-2) and the main pipeline (1022) have a second branch point and a second confluence point; the second confluence point is located at a preset interval between the first branch points.

7. The circulating cooling water system (100) according to claim 1, characterized in that, The wing-shaped branch (1023) includes an arc segment and a straight segment connected in sequence; wherein the arc segment is located upstream of the straight segment.

8. The circulating cooling water system (100) according to any one of claims 1 to 6, characterized in that, The two ends of the cooling acceleration pipe section (1021) are detachably connected to the rest of the return water pipe (102) via flanges.

9. The circulating cooling water system (100) according to claim 1, characterized in that, The cooling acceleration pipe section (1021) is installed near the return water outlet of the heat exchanger (101).

10. A method for operating a circulating cooling water system, applied to the circulating cooling water system as described in any one of claims 1 to 9, characterized in that, The method includes the following steps: The heated cooling water from the heat exchanger (101) is introduced into the cooling acceleration section (1021) in the return water pipeline (102). Within the cooling acceleration pipe section (1021), cooling water flows into the main pipe (1022) and the finned branch (1023) with higher flow resistance at each group flow point (1024). The cooling water flowing through the finned branch (1023) is cooled by extending the flow path and increasing the heat dissipation surface area; The cooling water flowing faster in the main pipe (1022) and the cooling water flowing slower in the finned branch (1023) re-merge at the downstream confluence point (1025), and the higher momentum of the fluid from the main pipe (1022) is used to eject and push the fluid from the finned branch (1023), thereby achieving a slight acceleration of the overall flow rate.

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