Spray systems to reduce wall flow in cooling towers

Abstract

The utility model discloses a spray system for reducing the wall flow of a cooling tower, comprising a water distribution main pipe, which is arranged above the packing of the cooling tower, and a plurality of water distribution branches connected thereto are evenly arranged along the length direction thereof; a splash device, which is arranged below the water distribution branch pipe, and is used to spray cooling water to the packing below the cooling tower; wherein the splash device adjacent to the inner wall of the cooling tower is a semi-open splash device; the semi-open splash device comprises: a water spray pipe, which is arranged to be connected to the water distribution branch pipe; a connecting seat, which is sleeved on the water spray pipe; a water splash plate, which is arranged below the water spray pipe; an arc-shaped water shield, the upper end of which is connected to the connecting seat, and the lower end of which is connected to the water splash plate; the arc-shaped water shield closes a part of the space between the connecting seat and the water splash plate, so as to prevent the cooling water in the water spray pipe from splashing to the inner wall of the cooling tower, thereby reducing the wall flow of the cooling tower. The spray system can reduce the wall flow phenomenon of the cooling tower and improve the cooling efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling equipment, and in particular relates to a spray system for reducing wall flow of a cooling tower. Background Art

[0002] Wet cooling towers generally use ambient air to take away waste heat from the cooling water. The air goes up from the bottom of the cooling tower, and the cooling water goes down from the top of the cooling tower. The cooling water is sprayed on the packing of the cooling tower through the splashing device of the water distribution pipe, and heat is exchanged with the air in the packing, thereby achieving the purpose of cooling the water.

[0003] In order to distribute water evenly and improve heat exchange efficiency, the packing area is divided into squares with a side length of one meter when designing the cooling tower water distribution system. Splashing devices are installed at the center point of each square, and the spraying ranges of adjacent splashing devices partially overlap to give full play to the cooling performance of the packing. In the central area of ​​the cooling tower, the above arrangement is conducive to improving heat exchange efficiency. However, most of the cooling water sprayed by the outermost circle splashing device will be directly sprayed onto the inner wall of the cooling tower and flow down along the inner wall. These cooling waters do not have efficient heat exchange with the air through the packing, which will reduce the overall thermal performance of the cooling tower. As the scale of the cooling tower decreases, the impact of wall flow becomes more serious. Taking a 6m×6m square cooling tower as an example, wall flow accounts for 30% of the total cooling water flow of the cooling tower. Utility Model Content

[0004] In view of this, some embodiments disclose a spray system for reducing wall flow of a cooling tower. The spray system is connected to a water supply system of the cooling tower. The spray system includes:

[0005] A water distribution main pipe is arranged above the cooling tower filler, and a plurality of water distribution branch pipes connected to the water distribution main pipe are evenly arranged along the length direction of the water distribution main pipe;

[0006] A spraying device, arranged below the water distribution branch pipe and connected thereto, for spraying cooling water onto the filler below the cooling tower;

[0007] Wherein, the splash device adjacent to the inner wall of the cooling tower is a semi-open splash device; the semi-open splash device includes:

[0008] A water spray pipe is arranged to be connected with a water distribution branch pipe;

[0009] A connecting seat is sleeved on the water spray pipe;

[0010] A splash plate, arranged below the water spray pipe;

[0011] The arc-shaped water retaining cover has an upper end connected to the connecting seat, and a lower end connected to the splash plate; the arc-shaped water retaining cover closes part of the space between the connecting seat and the splash plate to prevent the cooling water in the spray pipe from splashing onto the inner wall of the cooling tower, thereby reducing the wall flow of the cooling tower.

[0012] In some embodiments of the spray system for reducing wall flow of a cooling tower, the arc-shaped water retaining cover is a hemispherical structure, and the outer surface of the arc-shaped water retaining cover is opposite to the inner wall of the cooling tower.

[0013] Some embodiments disclose a spray system for reducing wall flow in a cooling tower, wherein the semi-open spray device further comprises a support rod, wherein both ends of the support rod are respectively connected to a connecting seat and a splash plate, and a plurality of support rods are provided to serve as structural reinforcement components of the semi-open spray device.

[0014] Some embodiments disclose a spray system for reducing wall flow in a cooling tower, wherein the deflector comprises:

[0015] The disk body, wherein the middle position of the disk body protrudes upward to form a protrusion;

[0016] A splash bar, one end of which is connected to the edge of the disk body, and the other end of which extends obliquely upwardly from the disk body; a plurality of splash bars are arranged at intervals on the edge of the disk body.

[0017] In some embodiments of the spray system for reducing wall flow in a cooling tower, the spray device located in the middle of the cooling tower is a fully open spray device.

[0018] In the spray system for reducing wall flow of a cooling tower disclosed in some embodiments, the arrangement density of the semi-open spray devices is less than the arrangement density of the fully-open spray devices.

[0019] In the spray system for reducing wall flow of a cooling tower disclosed in some embodiments, the diameter of the water distribution main pipe is larger than the diameter of the water distribution branch pipe.

[0020] Some embodiments disclose a spray system for reducing wall flow in a cooling tower, wherein the top view shape of the spray system is adapted to the cross-sectional shape of the cooling tower.

[0021] In the spray system for reducing wall flow of a cooling tower disclosed in some embodiments, a first flow control valve is disposed on the water distribution main.

[0022] In the spray system for reducing wall flow of a cooling tower disclosed in some embodiments, a second flow control valve is provided on the water distribution branch pipe adjacent to the inner wall of the cooling tower.

[0023] The spray system for reducing the wall flow of a cooling tower disclosed in the embodiment of the utility model can reduce the wall flow phenomenon of the cooling tower and improve the cooling efficiency of the cooling tower. The spray system for reducing the wall flow of a cooling tower disclosed in the embodiment of the utility model is simple to install and has good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Example 1 is a schematic diagram of the structure of a spray system for reducing wall flow in a cooling tower;

[0025] Figure 2 Schematic diagram of the structure of the semi-open splashing device of Example 1.

[0026] Reference numerals

[0027] 1 Water distribution main 2 Water distribution branch

[0028] 3 Semi-open splash device 31 Connecting seat

[0029] 32 Spray pipe 33 Splash plate

[0030] 34 arc-shaped water shield 35 support rod

[0031] 100 Cooling Tower DETAILED DESCRIPTION

[0032] The word "embodiment" used here as an "exemplary" does not necessarily mean that any embodiment described is superior to or better than other embodiments. Unless otherwise specified, the performance index tests in the embodiments of this application are performed using conventional test methods in the art. It should be understood that the terms described in this application are only used to describe specific implementation methods and are not used to limit the content disclosed in this application.

[0033] Unless otherwise specified, the technical and scientific terms used in this document have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs; other experimental methods and technical means not specifically specified in this application refer to experimental methods and technical means commonly used by ordinary technicians in this field.

[0034] The terms "substantially" and "approximately" used herein are used to describe small fluctuations. For example, they can refer to less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ±0.1%, such as less than or equal to ±0.05%. The numerical data represented or presented in the range format herein are used only for convenience and brevity, and should therefore be flexibly interpreted as including not only the values ​​clearly listed as the limits of the range, but also all independent values ​​or sub-ranges contained in the range. For example, the numerical range of "1-5%" should be interpreted as including not only the clearly listed values ​​of 1% to 5%, but also the independent values ​​and sub-ranges within the range shown. Therefore, independent values ​​such as 2%, 3.5% and 4% and sub-ranges such as 1%-3%, 2%-4% and 3%-5% are included in this numerical range. This principle also applies to the range of only one numerical value. In addition, such an interpretation applies regardless of the width of the range or the characteristics described.

[0035] In this document, including in the claims, transitional words such as "comprises," "includes," "with," "having," "containing," "involving," "accommodating," etc. are understood to be open-ended, i.e., meaning "including but not limited to." Only the transitional words "consisting of" and "composed of" are closed transitional words.

[0036] In order to better illustrate the content of the present application, numerous specific details are provided in the specific examples below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In the embodiments, some methods, means, instruments, equipment, etc. well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0037] Under the premise of no conflict, the technical features disclosed in the embodiments of the present application can be arbitrarily combined, and the obtained technical solutions belong to the contents disclosed in the embodiments of the present application. It should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like mentioned in the present application indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the technical features and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention, unless it conflicts with the context. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance, unless it conflicts with the context.

[0038] In some embodiments, a spray system for reducing cooling tower wall flow is connected to a water supply system of a cooling tower. The water supply system of the cooling tower delivers cooling water with waste heat to the spray system. The cooling water with waste heat is exchanged with air in a cooling tower filler through the spray system.

[0039] In some embodiments, a spray system for reducing cooling tower wall flow comprises:

[0040] A water distribution main pipe is arranged above the cooling tower filler, and a plurality of water distribution branch pipes connected to the water distribution main pipe are evenly arranged along the length direction of the water distribution main pipe;

[0041] A spraying device is arranged below the water distribution branch pipe and is connected to the water distribution branch pipe, and is used to spray cooling water to the filler below the cooling tower;

[0042] Wherein, the splash device adjacent to the inner wall of the cooling tower is a semi-open splash device; the semi-open splash device includes:

[0043] A water spray pipe is arranged to be connected with a water distribution branch pipe;

[0044] A connecting seat is sleeved on the water spray pipe;

[0045] A splash plate, arranged below the water spray pipe;

[0046] The arc-shaped water shield has an upper end connected to the connection seat, and a lower end connected to the splash plate; the arc-shaped water shield seals part of the space between the connection seat and the splash plate to prevent the cooling water in the water spray pipe from splashing onto the inner wall of the cooling tower, thereby reducing the wall flow of the cooling tower. Usually, the arc-shaped water shield has a certain curvature in the vertical extension direction from the connection seat to the splash plate, and is an arc-shaped structure; the arc-shaped water shield also has a certain curvature in the lateral extension direction, and is an arc-shaped structure.

[0047] The side portion where the connecting seat and the splash plate are connected and closed by the arc-shaped water retaining cover is close to the inner wall of the cooling tower, and the side portion not closed by the arc-shaped water retaining cover faces the filler; when cooling water is sprayed onto the splash plate from the water spray pipe, the cooling water splashed on the splash plate toward the inner wall of the cooling tower is blocked by the arc-shaped water retaining cover, preventing the cooling water from spraying toward the inner wall of the cooling tower and further flowing downward along the inner wall of the cooling tower, and the spray water can only splash outward from the portion where the connecting seat and the splash plate are not closed by the arc-shaped water retaining cover; generally, the side portions of the connecting seat and the splash plate that are not closed by the arc-shaped water retaining cover face the filler arranged in the middle position of the cooling tower.

[0048] In some embodiments, the arc-shaped water retaining cover is a hemispherical structure, and the outer surface of the arc-shaped water retaining cover is opposite to the inner wall of the cooling tower. The hemispherical structure of the arc-shaped water retaining cover can block the cooling water splashing toward the inner wall of the cooling tower in all directions, thereby reducing the amount of cooling water sprayed onto the inner wall of the cooling tower.

[0049] In some embodiments, the spacing between adjacent water distribution branch pipes is 1.0 m.

[0050] In some embodiments, the splashing radius of the semi-open splashing device is 1.0 to 2.0 m.

[0051] In some embodiments, two circles of semi-open splash devices are arranged around the inner wall of the cooling tower from the area close to the inner wall of the cooling tower toward the middle area of ​​the cooling tower.

[0052] In some embodiments, the semi-open splashing device also includes a support rod, both ends of which are respectively connected to the connecting seat and the splash plate. A plurality of support rods are provided, which serve as structural reinforcement components of the semi-open splashing device to ensure the structural stability of the semi-open splashing device.

[0053] In some embodiments, the support rod is located outside the arc-shaped water shield.

[0054] In some embodiments, the upper end of the arc-shaped water shield is welded to the outer wall of the connecting seat, and the lower end of the arc-shaped water shield is welded to the bottom of the splash plate to prevent cooling water from splashing out from the connecting gap between the arc-shaped water shield and the connecting seat or the splash plate onto the inner wall of the cooling tower.

[0055] In some embodiments, the deflector includes:

[0056] The disc body, the middle position of the disc body protrudes upward to form a protrusion; the disc body can transform the columnar water flow flowing out of the water spray pipe into a planar water flow, thereby increasing the splashing area;

[0057] A splash bar, one end of which is connected to the edge of the disk body, and the other end of which extends obliquely upwardly toward the disk body; a plurality of splash bars are arranged at intervals on the edge of the disk body, and the splash bars can change the splashing direction of the water flow.

[0058] In some embodiments, the spray device located in the middle of the cooling tower is a fully open spray device. The fully open spray device is located in the area directly above the cooling tower filler. The fully open spray device can make the spray range wider and the spray state more stable; usually, the fully open spray device is a common spray device on the market.

[0059] In some embodiments, the splash radius of the fully open splash device is 1.0 to 2.0 m.

[0060] In some embodiments, the setting density of the semi-open splashing device is lower than the setting density of the fully-open splashing device, which can enable most of the cooling water to be sprayed downward from the middle position of the cooling tower for effective heat exchange, and can avoid most of the cooling water from being sprayed downward from a position close to the inner wall of the cooling tower, thereby reducing the wall flow phenomenon in the cooling tower.

[0061] In some embodiments, the diameter of the water distribution main pipe is larger than the diameter of the water distribution branch pipe. When the equipment is running, the cooling water can flow evenly and quickly from the water distribution main pipe to each water distribution branch pipe, and the splashing device on the water distribution branch pipe can quickly reach a predetermined splashing pressure, making the cooling water splashing state more stable and uniform.

[0062] In some embodiments, the top view shape of the spray system is adapted to the cross-sectional shape of the cooling tower to maximize the heat exchangeable area of ​​the cooling water.

[0063] As an optional embodiment, the top view shape of the spray system is square or circular.

[0064] In some embodiments, a first flow control valve is provided on the water distribution main pipe, which can be used to adjust the spray flow of the spray device located in the middle of the cooling tower, reduce the moisture content of the air above the cooling tower filler, and thus reduce or avoid the generation of water mist above the cooling tower filler.

[0065] In some embodiments, a second flow control valve is provided on the water distribution branch adjacent to the inner wall of the cooling tower, and the spray flow rate of the semi-open splashing device adjacent to the inner wall of the cooling tower can be adjusted by the second flow control valve to reduce or avoid the cooling water splashing onto the inner wall of the cooling tower, thereby reducing or avoiding the wall flow phenomenon of the cooling tower.

[0066] The technical details are further illustrated below in conjunction with embodiments.

[0067] Example 1

[0068] Figure 1 It is a schematic structural diagram of a spray system for reducing wall flow of a cooling tower disclosed in Example 1; Figure 2 This is a schematic diagram of the structure of the semi-open splashing device disclosed in Example 1.

[0069] like Figure 1 , Figure 2 As shown, the spray system for reducing the wall flow of the cooling tower includes a water distribution main pipe 1 arranged in the middle area of ​​the cooling tower 100, a plurality of water distribution branch pipes 2 connected to both sides of the water distribution main pipe 1, and a splash device connected below the water distribution branch pipe 2, wherein the splash device adjacent to the inner wall of the cooling tower 100 is a semi-open splash device 3;

[0070] Among them, the semi-open splashing device 3 includes a water spray pipe 32 connected to the water distribution branch pipe 2, a connecting seat 31 sleeved on the water spray pipe 32, a splash plate 33 arranged below the water spray pipe 32, an arc-shaped water shield 34 connected between the connecting seat 31 and the splash plate 33, and a support rod 35 connected between the connecting seat 31 and the splash plate 33 and located on the outside of the arc-shaped water shield 34. The arc-shaped water shield 34 closes half of the space between the connecting seat 31 and the splash plate 33. The side of the connecting seat 31 and the splash plate 33 closed by the arc-shaped water shield is close to the inner wall of the cooling tower. When cooling water is sprayed from the water spray pipe 32 onto the splash plate 33, the cooling water splashed from the splash plate 33 toward the inner wall of the cooling tower 100 is blocked by the arc-shaped water shield 34 and the splash direction is changed, and the cooling water splashes outward from the part of the connecting seat 31 and the splash plate 33 that is not closed by the arc-shaped water shield 34.

[0071] The spray system for reducing the wall flow of a cooling tower disclosed in the embodiment of the utility model can reduce the wall flow phenomenon of the cooling tower and improve the cooling efficiency of the cooling tower. The spray system for reducing the wall flow of a cooling tower disclosed in the embodiment of the utility model is simple to install and has good economy.

[0072] The technical solutions disclosed in the present utility model and the technical details disclosed in the embodiments are merely illustrative of the inventive concept of the present utility model and do not constitute a limitation on the technical solutions of the present utility model. Any conventional changes, replacements or combinations of the technical details disclosed in the embodiments of the present utility model have the same inventive concept as the present utility model and are within the protection scope of the claims of the present utility model.

Claims

1. A spray system for reducing wall flow in a cooling tower, characterized in that: The spray system comprises: A water distribution main pipe is arranged above the cooling tower filler, and a plurality of water distribution branch pipes connected to the water distribution main pipe are evenly arranged along the length direction of the water distribution main pipe; A spraying device, arranged below the water distribution branch pipe and connected thereto, for spraying cooling water onto the filler below the cooling tower; Wherein, the splashing device adjacent to the inner wall of the cooling tower is a semi-open splashing device; the semi-open splashing device comprises: A water spray pipe, arranged to be in communication with the water distribution branch pipe; A connecting seat, sleeved on the water spray pipe; A water splash plate, arranged below the water spray pipe; An arc-shaped water shield, the upper end of which is connected to the connecting seat, and the lower end of which is connected to the splash plate; the arc-shaped water shield closes part of the space between the connecting seat and the splash plate to prevent the cooling water in the spray pipe from splashing onto the inner wall of the cooling tower, thereby reducing the wall flow of the cooling tower.

2. The spray system for reducing wall flow of a cooling tower according to claim 1, characterized in that: The arc-shaped water retaining cover is a hemispherical structure, and the outer surface of the arc-shaped water retaining cover is opposite to the inner wall of the cooling tower.

3. The spray system for reducing wall flow of a cooling tower according to claim 1, characterized in that: The semi-open splash device further comprises a support rod, both ends of which are respectively connected to the connecting seat and the splash plate, and a plurality of support rods are provided to serve as structural reinforcement components of the semi-open splash device.

4. The spray system for reducing wall flow of a cooling tower according to claim 1, characterized in that: The deflector comprises: A disc body, wherein the middle position of the disc body protrudes upward to form a protrusion; A splash bar, one end of which is connected to the edge of the disk body, and the other end of which extends obliquely upward from the disk body; a plurality of splash bars are arranged at intervals on the edge of the disk body.

5. The spray system for reducing wall flow of a cooling tower according to claim 1, characterized in that: The splash device located in the middle of the cooling tower is a fully open splash device.

6. The spray system for reducing wall flow of a cooling tower according to claim 5, characterized in that: The arrangement density of the half-open splashing devices is less than the arrangement density of the fully-open splashing devices.

7. The spray system for reducing wall flow of a cooling tower according to any one of claims 1 to 6, characterized in that: The diameter of the water distribution main pipe is larger than the diameter of the water distribution branch pipe.

8. The spray system for reducing wall flow of a cooling tower according to any one of claims 1 to 6, characterized in that: The top view shape of the spray system is adapted to the cross-sectional shape of the cooling tower.

9. The spray system for reducing wall flow of a cooling tower according to any one of claims 1 to 6, characterized in that: The water distribution main pipe is provided with a first flow control valve.

10. The spray system for reducing wall flow of a cooling tower according to any one of claims 1 to 6, characterized in that: A second flow control valve is arranged on the water distribution branch pipe adjacent to the inner wall of the cooling tower.

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