A cooling tower

Abstract

The present application relates to a kind of cooling towers.The cooling tower includes: tower drum, including tower drum body and the multiple person-shaped column of supporting being arranged at the bottom of tower drum body;Water collecting tank, is arranged in tower drum body;And water outlet unit, including backwater ditch and suction steel pipe, backwater ditch is arranged in tower drum body, and is located below water collecting tank, backwater ditch is communicated with water collecting tank;Suction steel pipe has water inlet end and the water outlet end opposite to water inlet end, water inlet end is communicated with backwater ditch, water outlet end is by the adjacent two person-shaped column between and is taken out tower drum body outside, and is used to be connected with the inlet of suction pump.

Description

Technical Field

[0001] This invention relates to the field of cooling tower effluent technology, and in particular to a cooling tower. Background Technology

[0002] An elevated water collection cooling tower, also known simply as an "elevated tower," is a counter-flow natural draft cooling tower equipped with an elevated water collection device and a central water collection trough. The elevated water collection device consists of components such as a water collection ramp, a splash guard, and a water collection trough located below the water-spreading packing material. After water collection, it gathers in the central water collection trough and then flows back to the pump room.

[0003] The most persistent technical challenge in existing high-level cooling tower secondary circulation schemes lies in the layout and structural design of the section from the high-level cooling tower's water collection trough exiting the tower to the pump house. Current layouts and structural designs for this section involve a significant necking at the exit of the water collection trough, forming a concrete return water channel that penetrates the A-frame column of the cooling tower. After penetration, this channel connects to the external return water channel, which is then lengthened, deepened, and widened to serve process rectification and circulating pump suction. However, the concrete return water channel at the water collection trough exiting the tower bears a water pressure between 16m and 21m, creating a conflict between process cross-section and structural design considerations. On the one hand, the process requires the return water ditch to have a large enough cross-section to ensure stable water flow. On the other hand, the return water ditch structure needs to pass through the A-frame columns of the cooling tower at this location, and the spacing between the A-frame columns generally does not meet the process cross-sectional requirements. Moreover, the A-frame columns are spatially oblique supports, which means that in order to maximize the process cross-section, the return water ditch at this location needs to be necked at the top and wider at the bottom, or have an irregular structure, which in turn affects the water flow. Furthermore, reinforced concrete structures are not strong in bearing internal pressure, resulting in a calculated wall thickness of approximately 0.9 to 1.4 meters for the return water ditch structure. The increased wall thickness further affects the flow. On the other hand, in order to meet the rectification requirements of high-speed water flow after exiting the tower, the return water ditch outside the tower needs to be lengthened, deepened, and its cross-section widened obliquely. Finally, it is expanded to meet the water suction spacing requirements of several circulating pumps, so that the vertical side wall height of the return water ditch outside the tower is 8m to 10m, and the structural span of the top and bottom plates is 20m to 28m. It still has to withstand the water pressure in the water collection tank between 16m and 21m, which makes it difficult to design the return water ditch structure that bears the internal pressure. It is necessary to add multiple large-section columns in the middle to bear the structural deformation and internal pressure. The columns are numerous and have large cross-sections, which actually affects the process water flow and is not conducive to water distribution. Summary of the Invention

[0004] Therefore, it is necessary to provide a cooling tower that improves upon the aforementioned shortcomings, addressing the significant challenges in the layout and structural design of the water collection tank section from the tower outlet to the pump room in existing high-level cooling towers.

[0005] A cooling tower, comprising:

[0006] The tower includes a tower body and multiple herringbone columns supported at the bottom of the tower body.

[0007] A water collection tank is installed inside the tower body; and

[0008] The water outlet unit includes a return water ditch and a suction steel pipe. The return water ditch is located inside the tower body and below the water collection tank, and the return water ditch is connected to the water collection tank. The suction steel pipe has an inlet end and an outlet end opposite to the inlet end. The inlet end is connected to the return water ditch, and the outlet end extends out of the tower body between two adjacent A-frame columns and is used to connect to the inlet of the suction pump.

[0009] In one embodiment, the return water ditch has a first end and a second end opposite to the first end, and the width of the return water ditch gradually increases in the direction from the first end to the second end;

[0010] The second end of the return water ditch has a water outlet, and the water inlet end of the water suction steel pipe is connected to the water outlet.

[0011] In one embodiment, there are multiple water-absorbing steel pipes, and the second end of the return water ditch has multiple water outlets corresponding to the multiple water-absorbing steel pipes one by one. The water inlet end of each water-absorbing steel pipe is connected to the corresponding water outlet.

[0012] In one embodiment, a plurality of the water outlets are arranged at intervals along the width direction of the return water channel.

[0013] In one embodiment, the water collection tank includes a main tank section and an end tank section connected to the end of the main tank section, the end tank section being located above the return water ditch; the bottom of the end tank section has a water outlet opening, and the top of the return water ditch has a water inlet opening communicating with the water outlet opening.

[0014] In one embodiment, the cooling tower further includes a first support column, which is supported between the top of the return water ditch and the end section.

[0015] In one embodiment, the bottom elevation of the end trough is higher than the bottom elevation of the main trough, so as to form a receiving space below the end trough for accommodating the return water ditch.

[0016] In one embodiment, the cooling tower further includes a water spraying unit and a second support column disposed within the tower body. The water spraying unit is located above the water collection trough, and the second support column is supported between the top of the return water ditch and the water spraying unit.

[0017] In one embodiment, two water outlet units are provided, with the two water outlet units respectively located at both ends of the longitudinal length of the water collection tank, and the return water channel of each water outlet unit is connected to the corresponding end of the water collection tank.

[0018] In one embodiment, both the water collection tank and the return water ditch are reinforced concrete structures.

[0019] In actual use, the water to be cooled enters the tower body and is cooled within it. The cooled water is collected in a collection tank, which then flows into a return water ditch below, where a stable flow is achieved. The water in the return water ditch is then discharged through a suction pipe to the outside of the tower body and enters the suction pump in the pump house, where it continues to be pumped downstream.

[0020] In this way, the return water ditch is moved inside the tower body, and a suction steel pipe is used to pass through the space between two adjacent A-frame columns to the outside of the tower body, thereby draining the water in the return water ditch to the pump room. On the one hand, it makes full use of the characteristics of the suction steel pipe in bearing internal pressure and the stability of water flow. The space between the two adjacent A-frame columns is large enough for the suction steel pipe to pass through, which solves the problems of cross-section reduction, excessive internal pressure, high water flow velocity, and structural settlement of the concrete return water ditch structure passing through the A-frame columns. On the other hand, the suction steel pipe directly connects the return water ditch inside the tower and the suction pump outside the tower, completely eliminating the construction of the return water ditch outside the tower, greatly reducing the space required outside the tower, avoiding the various difficulties in designing and constructing the high internal water pressure return water ditch outside the tower, and avoiding the mutual interference between the construction of the tall cooling tower structure and the underground excavation of the return water ditch outside the tower. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a cooling tower according to one embodiment of the present invention;

[0022] Figure 2 for Figure 1 The top view of the cooling tower shown;

[0023] Figure 3 for Figure 1 The water outlet unit of the cooling tower shown;

[0024] Figure 4 for Figure 1 A magnified view of a portion of point A in the middle. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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 limitations on this invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Please see Figure 1 and Figure 2 An embodiment of the present invention provides a cooling tower, including a tower cylinder 10, a water collection tank 20, and a water outlet unit 30. The tower cylinder 10 includes a tower body 11 and multiple A-frame columns 13 supported at the bottom of the tower body 11, that is, the tower body 11 is supported by multiple A-frame columns 13. Furthermore, the multiple A-frame columns 13 are evenly spaced along the circumference of the tower body 11 at the bottom of the tower body 11, thereby achieving stable support for the tower body 11.

[0032] A water collection tank 20 is installed inside the tower body 11 to collect water after cooling. The water outlet unit 30 includes a return water channel 31 and a suction steel pipe 32. The return water channel 31 is also installed inside the tower body 11 and located below the water collection tank 20. The return water channel 31 communicates with the water collection tank 20, allowing water collected in the water collection tank 20 to flow into the return water channel 31, thereby stabilizing the water flow and making the flow pattern more stable. The suction steel pipe 32 has an inlet end and an outlet end opposite to the inlet end. The inlet end of the suction steel pipe 32 is connected to the return water ditch 31, and the outlet end of the suction steel pipe 32 extends from between two adjacent A-frame columns 13 to the outside of the tower body 11, and is used to connect to the inlet of the suction pump 40 in the pump house. This allows water in the return water ditch 31 to enter the suction pump 40 in the pump house through the suction steel pipe 32, and be transported downstream by the pumping action of the suction pump 40. Furthermore, both the water collection tank 20 and the return water ditch 31 are reinforced concrete structures.

[0033] In actual use, the water to be cooled enters the tower body 11 and is cooled within it. The cooled water is collected in the water collection tank 20, which then flows into the return water ditch 31 below, where a stable flow is achieved. The water in the return water ditch 31 is then discharged through the suction pipe 32 to the outside of the tower body 11 and enters the suction pump 40 in the pump room, where it continues to be pumped downstream.

[0034] In this way, the return water ditch 31 is moved inside the tower body 11, and the suction steel pipe 32 is used to pass through the space between two adjacent A-frame columns 13 to the outside of the tower body 11, thereby draining the water in the return water ditch 31 to the pump room. On the one hand, the characteristics of the suction steel pipe 32 in bearing internal pressure and the stability of water flow are fully utilized. The space between the two adjacent A-frame columns 13 is sufficient for the suction steel pipe 32 to pass through, which solves the problems of cross-section reduction, excessive internal pressure, high water flow velocity, and structural settlement of the concrete return water ditch 31 structure passing through the A-frame columns 13. On the other hand, the suction steel pipe 32 directly connects the return water ditch 31 inside the tower and the suction pump 40 outside the tower, completely eliminating the construction of the return water ditch outside the tower, greatly reducing the space required outside the tower, avoiding the various difficulties in designing and constructing the high internal water pressure return water ditch outside the tower, and avoiding the mutual interference between the construction of the tall cooling tower structure and the underground excavation of the return water ditch outside the tower.

[0035] Overall, the cooling tower of this invention fully ensures that cooling performance is not affected, while achieving more reasonable water distribution and more stable flow. Structurally, it solves problems such as the reduced cross-section of the concrete return water ditch structure passing through the A-frame column 13 of the cooling tower, excessive internal pressure, high water flow velocity, and structural settlement. It eliminates all concrete return water ditches outside the tower, significantly saving land area and optimizing the plant layout. Economically, it saves a lot of construction investment, ultimately achieving a win-win situation in terms of process flow, structural design, overall layout, and economic investment, significantly achieving energy conservation and emission reduction effects, and has very significant social and economic benefits.

[0036] Please see Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the return water ditch 31 has a first end 311 and a second end 313 opposite to the first end 311. Furthermore, the width of the return water ditch 31 gradually increases from the first end 311 to the second end 313. The second end 313 of the return water ditch 31 has an outlet 35, and the inlet end of the suction steel pipe 32 is connected to the outlet 35, thereby allowing water in the return water ditch 31 to enter the suction steel pipe 32 through the outlet 35 of the second end 313, and then enter the suction pump 40 in the pump room through the suction steel pipe 32.

[0037] Thus, the water entering the return water ditch 31 from the collection tank 20 flows towards the second end 313 of the return water ditch 31. As the width of the return water ditch 31 gradually increases from the first end 311 to the second end 313, it stabilizes the water flow, making the flow pattern gradually stable. The water at the second end 313 of the return water ditch 31 is then transported to the outside of the tower body 11 through the suction steel pipe 32, and then enters the suction pump 40 in the pump house.

[0038] Furthermore, there are multiple suction steel pipes 32, and the second end 313 of the return water ditch 31 has multiple outlets 35 corresponding to the multiple suction steel pipes 32. The inlet end of each suction steel pipe 32 is connected to the corresponding outlet 35, and the outlet end of each suction steel pipe 32 is connected to the corresponding suction pump 40. Thus, the water in the return water ditch 31 enters each suction steel pipe 32 through each outlet 35, and then enters each suction pump 40 in the pump house through each suction steel pipe 32.

[0039] Optionally, the aforementioned plurality of water outlets 35 are arranged at intervals along the width direction of the return water ditch 31. Specifically... Figure 3 In the embodiment shown, the second end 313 of the return water ditch 31 has three outlets 35.

[0040] In an embodiment of the present invention, the water collection tank 20 includes a main tank section 21 and an end tank section 23 connected to the end of the main tank section 21, the end tank section 23 being located above the return water ditch 31. The bottom of the end tank section 23 has an outlet opening, and the top of the return water ditch 31 has an inlet opening communicating with the outlet opening, thereby allowing water in the main tank section 21 to move towards the end tank section 23 and then downwards through the outlet opening and the inlet opening into the return water ditch 31. Thus, compared to the prior art where water enters the return water ditch horizontally, in this embodiment, the water in the water collection tank 20 enters the return water ditch 31 downwards, resulting in a more stable water flow.

[0041] Furthermore, the cooling tower also includes a first support column 50, which is supported between the top of the return water ditch 31 and the end section 23, thereby supporting and fixing the end section 23 above the return water ditch 31. In this way, on the one hand, the force exerted by the first support column 50 on the return water ditch 31 can balance the internal water pressure borne by the top of the return water ditch 31, improving the return water ditch 31's ability to withstand internal water pressure; on the other hand, due to the presence of the return water ditch 31, the length of the first support column 50 is reduced, which is beneficial to the structural design of the first support column 50; and furthermore, the presence of the first support column 50 strengthens the top of the return water ditch 31, preventing the top span of the return water ditch 31 from being too large.

[0042] Furthermore, the bottom elevation of the end section 23 is higher than the bottom elevation of the main section 21, so as to form a receiving space below the end section 23 for accommodating the return water ditch 31. In this way, due to the presence of the return water ditch 31, the side wall height of the end section 23 of the water collection tank 20 is reduced. That is, the return water ditch 31 divides the side wall height of the water collection tank 20. The return water ditch 31 serves as a supporting base for the water collection tank 20, making the water collection tank 20 more stable, and at the same time, it is beneficial to the side wall structure design and reinforcement of the water collection tank 20.

[0043] In a specific embodiment, the cooling tower also includes a water spraying unit (not shown) and a second support column 60 disposed within the tower body 11. The water spraying unit is located above the water collection tank 20, and the second support column 60 is positioned between the top of the return water ditch 31 and the water spraying unit, thus supporting the water spraying unit. The presence of the return water ditch 31 reduces the length of the second support column 60, which is beneficial for its structural design.

[0044] In a specific embodiment, two water outlet units 30 are provided. The two water outlet units 30 are respectively located at both ends of the longitudinal length of the water collection tank 20, and the return water channel 31 of each water outlet unit 30 is connected to the corresponding end of the water collection tank 20. Thus, the water collected by the main channel section 21 of the water collection tank 20 flows to the end channel sections 23 at both ends, and enters the return water channel 31 of the two water outlet units 30 through the end channel sections 23 at both ends.

[0045] Of course, in other embodiments, when the water collection tank 20 has water outlet at only one end, only one water outlet unit 30 needs to be set up.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A cooling tower, characterized in that, include: The tower includes a tower body (11) and multiple herringbone columns (13) supported at the bottom of the tower body (11); a water collection trough (20) disposed inside the tower body (11); and a water outlet unit (30) including a return water ditch (31) and a suction steel pipe (32). The return water ditch (31) is disposed inside the tower body (11) and located below the water collection trough (20). The return water ditch (31) is connected to the water collection trough (20). The suction steel pipe (32) has an inlet end and an outlet end opposite to the inlet end. The inlet end is connected to the return water ditch (31). The outlet end passes through the tower body (11) between two adjacent herringbone columns (13) and is used to connect to the inlet of the suction pump (40). The return water ditch (31) has a first end (311) and a second end (313) opposite to the first end (311), and the width of the return water ditch (31) gradually increases from the first end (311) to the second end (313); the second end (313) of the return water ditch (31) has an outlet (35), and the inlet end of the water suction pipe (32) is connected to the outlet (35).

2. The cooling tower according to claim 1, characterized in that, The number of the water-absorbing steel pipes (32) is multiple, and the second end (313) of the return water ditch (31) has multiple water outlets (35) corresponding one-to-one with the multiple water-absorbing steel pipes (32). The water inlet end of each water-absorbing steel pipe (32) is connected to the corresponding water outlet (35).

3. The cooling tower according to claim 2, characterized in that, Multiple outlets (35) are arranged at intervals along the width direction of the return water ditch (31).

4. The cooling tower according to claim 1, characterized in that, The water collection tank (20) includes a main tank section (21) and an end tank section (23) connected to the end of the main tank section (21). The end tank section (23) is located above the return water ditch (31). The bottom of the end tank section (23) is provided with a water outlet, and the top of the return water ditch (31) is provided with a water inlet that communicates with the water outlet.

5. The cooling tower according to claim 4, characterized in that, The cooling tower also includes a first support column (50), which is supported between the top of the return water ditch (31) and the end trough section (23).

6. The cooling tower according to claim 4, characterized in that, The bottom elevation of the end section (23) is higher than the bottom elevation of the main section (21) to form a receiving space below the end section (23) for accommodating the return water ditch (31).

7. The cooling tower according to claim 1, characterized in that, The cooling tower also includes a water spraying unit and a second support column (60) disposed in the tower body (11). The water spraying unit is located above the water collection tank (20), and the second support column (60) is supported between the top of the return water ditch (31) and the water spraying unit.

8. The cooling tower according to claim 1, characterized in that, The water outlet unit (30) is configured as two units, which are respectively located at both ends of the longitudinal length of the water collection tank (20), and the return water channel (31) of each water outlet unit (30) is connected to the corresponding end of the water collection tank (20).

9. The cooling tower according to claim 1, characterized in that, Both the water collection trough (20) and the return water ditch (31) are reinforced concrete structures.

Images