Cross-flow cooling tower with flow equalizers and method

Abstract

The invention provides a cross-flow cooling tower with flow equalizers and a method, relates to the field of cooling towers, and aims to solve the problem that the utilization rates of different fillers are greatly different due to non-uniform air distribution in the filler of the existing cooling tower, the flow equalizers are arranged in an air area of a middle channel of a filler module and comprise a plurality of flow equalizing plates; the air outlet faces of the filler areas on the two sides of the air area are divided, airflow is guided to the negative-pressure fan cavities where the fans are arranged, airflow air quantity distribution in the filler areas is improved, the air quantity is more uniform, and therefore the overall cooling efficiency of the cooling tower is improved.

Description

Technical Field

[0001] The invention relates to the field of cooling towers, and in particular to a cross-flow cooling tower with a flow equalizer and a method. Background Art

[0002] In existing cross-flow cooling towers, the draft of the fan directly acts on the air outlet surface of the packing module. This design results in greater draft and more air volume in the packing module area close to the fan, while less draft and insufficient air volume in the packing area far from the fan. This uneven air volume distribution will result in low effective utilization of the packing and reduce the overall cooling efficiency of the cooling tower. In addition, when the fan power is large, the area close to the fan will pump out water from the packing module, resulting in increased water consumption of the cooling tower and adverse effects on the surrounding environment.

[0003] A Chinese patent (publication number: CN 108627026 A) discloses a centrifugal blast cross-flow cooling tower with optimized flow channel of guide plates. By arranging multiple guide plates between the second air outlet and the filler assembly, the guide plates are used to forcibly divert the inlet flow field, so that uniform air volume is formed in all directions, so that the air volume on the filler assembly is evenly distributed, effectively providing cooling efficiency, and effectively preventing the occurrence of drifting water caused by large air volume in some directions; but its multiple guide plates are evenly arranged at intervals up and down. According to the principles of fluid mechanics, the guide plates evenly arranged up and down cannot achieve the balance of air flow inside the air duct formed between the guide plates, and there is still an uneven distribution problem. The flow channel located near the fan still has a large air volume, while the flow channel far away from the fan has a small flow. In this way, due to the different resistance distribution of each flow channel, there will still be uneven air volume distribution, resulting in high utilization rate of some filler areas and low utilization rate of some filler areas, affecting the cooling effect of the cooling tower. Summary of the invention

[0004] The purpose of the present invention is to address the defects of the prior art and provide a cross-flow cooling tower and method with a flow equalizer. The flow equalizer is arranged in the middle channel air zone of the filler module. The flow equalizer includes a plurality of flow equalizer plates, which divide the air outlet surfaces of the filler areas on both sides of the air zone, and guide the airflow to the negative pressure fan cavity where the fan is placed, thereby improving the airflow and air volume distribution in the filler area, making the air volume more uniform, thereby improving the overall cooling efficiency of the cooling tower.

[0005] The first object of the present invention is to provide a cross-flow cooling tower with a flow equalizer, adopting the following scheme:

[0006] The utility model comprises a tower body and a filling module installed on the tower body, wherein the filling module is provided with an air zone and filling zones located on both sides of the air zone, wherein the side of the filling zone facing the air zone is an air outlet surface, and the side away from the air zone is an air inlet surface, and a connecting port is formed at the connecting position between the fan cavity and the air zone, and a flow equalizer is installed in the air zone, wherein the flow equalizer comprises a plurality of flow equalizer plates, one end of the flow equalizer plate is connected to the air outlet surface, and the other end extends to the connecting port, so that a plurality of isolated flow equalizer air ducts are formed in the air zone.

[0007] Furthermore, a plurality of flow equalizing plates are respectively connected to the air outlet surfaces on both sides of the air zone, and the flow equalizing plates are arc-shaped plates.

[0008] Furthermore, the concave side of the arc formed by the flow equalizing plate faces the connecting port, and the convex side faces the side of the air zone away from the connecting port.

[0009] Furthermore, the fan cavity is located outside one end of the air zone, forming a negative pressure zone relative to the wind inlet surface.

[0010] Furthermore, along the direction from one end of the air zone close to the fan cavity to one end away from the fan cavity, the distance between the flow equalizing plates connected to the same air outlet surface gradually increases.

[0011] Furthermore, the flow equalizer can be detachably installed in the air zone.

[0012] Furthermore, along the direction from the filling area on one side of the air zone to the filling area on the other side, all the flow equalizing plates extend to one end of the connecting port and are arranged in sequence and at intervals.

[0013] Furthermore, a fan is installed in the fan cavity, and the fan cavity is provided with an air outlet.

[0014] The second object of the present invention is to provide a working method of a cross-flow cooling tower with a flow equalizer as described in the first object, comprising:

[0015] The packing module is installed in the tower body, the packing area is filled with packing, and the flow equalizer is installed in the air area of ​​the packing area;

[0016] After the fan is installed in the fan cavity, the fan is used to form negative pressure in the fan cavity;

[0017] The airflow passes through the air inlet surface, the filler area, the air outlet surface, the flow-averaging air duct, and the connecting port in sequence and then enters the fan cavity. The airflow is cooled when passing through the filler area.

[0018] Furthermore, the airflow entering the air zone through the air outlet surface is divided into multiple airflows by the flow equalizing plate, and enters the fan cavity after passing through multiple flow equalizing air ducts respectively, so that the air volume in the air zone and the filler zone is evenly distributed.

[0019] Compared with the prior art, the present invention has the following advantages and positive effects:

[0020] (1) In order to solve the problem that the air volume distribution in the cooling tower packing is uneven, resulting in large differences in the utilization rate of different packings, a flow equalizer is arranged in the air zone of the middle channel of the packing module. The flow equalizer includes multiple flow equalizer plates, which divide the air outlet surface of the packing area on both sides of the air zone, and guide the air flow to the negative pressure fan cavity where the fan is installed, so as to improve the air flow distribution in the packing area, make the air volume more uniform, and thus improve the overall cooling efficiency of the cooling tower.

[0021] (2) The equalizer plate adopts a concave side-upward arc plate structure. The distance between adjacent equalizer plates is small in the area close to the fan, and the distance between plates is large in the area far from the fan, so as to obtain uniform air volume distribution inside the cooling tower. After installation, the equalizer effectively reduces the cooling efficiency decline and moisture extraction problems caused by uneven air volume distribution, and significantly improves the operating efficiency and water resource utilization rate of the cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 Schematic diagram of a cross-flow cooling tower with a flow equalizer in Examples 1 and 2 of the present invention.

[0024] Among them, 1. air area; 2. filler module; 3. flow equalizing plate; 4. connecting port; 5. fan; 6. flow equalizer; 7. air outlet surface; 8. fan cavity. DETAILED DESCRIPTION

[0025] Example 1

[0026] In a typical embodiment of the present invention, Figure 1 As shown, a cross-flow cooling tower with a flow equalizer is given.

[0027] The cooling tower in the prior art is provided with a guide plate inside, which performs a preliminary distribution of wind force. However, when the wind force passes through the packing assembly, due to different resistance distribution, the air volume distribution is still uneven, resulting in uneven utilization of the packing area, affecting the cooling effect. Based on this, this embodiment provides a cross-flow cooling tower with a flow equalizer, which aims to improve the air flow and air volume distribution in the packing area, make the air volume more uniform, and thus improve the overall cooling efficiency of the cooling tower.

[0028] like Figure 1As shown, the cross-flow cooling tower with flow equalizer includes a tower body and a filler module 2 installed on the tower body. The tower body is the main structure of the cross-flow cooling tower with flow equalizer. The filler module 2 is provided with an air zone 1 and filler zones located on both sides of the air zone 1. The air zone 1 is located in the middle of the filler module 2 and is the main passage for air flow. The filler zones are located on both sides of the air zone 1, the side facing the air zone 1 is the air outlet surface 7, and the side away from the air zone 1 is the air inlet surface. The fan cavity 8 is connected with the air zone 1 to form a connecting port 4.

[0029] The flow equalizer 6 is installed in the air zone 1, and includes a plurality of flow equalizer plates 3. One end of the flow equalizer plate 3 is connected to the air outlet surface 7, and the other end extends to the connecting port 4, dividing the air zone 1 into a plurality of flow equalizer ducts. The airflow enters from the air inlet surface of the packing area, passes through the packing area, and flows out from the air outlet surface 7. The flow equalizer 6 divides the air zone 1 into a plurality of flow equalizer ducts through a plurality of flow equalizer plates 3, and guides the airflow to the negative pressure fan chamber 8 where the fan 5 is placed. Through the design of the flow equalizer 6, the airflow volume distribution in the packing area is more uniform, and the cooling efficiency is improved.

[0030] In the prior art, due to the gap between the guide plate and the filler assembly and the different resistance distribution inside the filler assembly, the air volume is unevenly distributed. In this embodiment, the air zone 1 is divided into multiple equal flow air ducts by the equalizer 6, which effectively solves the problem of uneven air volume distribution. Due to the uneven air volume distribution, the utilization rate of some filler areas is high, and the utilization rate of some filler areas is low. In this regard, in this embodiment, the utilization rate of the filler area is more uniform by improving the air flow and air volume distribution. The equalizer 6 makes the cooling tower more stable during operation and reduces problems such as water drift caused by uneven air volume.

[0031] like Figure 1 As shown, multiple equalizer plates 3 are respectively connected to the air outlet surfaces 7 on both sides of the air zone 1. The equalizer plates 3 are designed in an arc shape. The arc structure helps to guide the airflow, so that it flows more evenly through the air outlet surface 7 and smoothly guides it into the fan cavity 8. The concave surface of the equalizer plate 3 faces the connecting port 4, and the convex surface faces the side of the air zone 1 away from the connecting port 4, which more effectively guides the airflow from the connecting port 4 to the air outlet surface 7, while reducing the turbulence and vortex of the airflow and improving the uniformity of the airflow.

[0032] The fan cavity 8 is located outside one end of the air zone 1, forming a negative pressure zone relative to the air inlet surface, which helps to attract external air into the air zone 1 and evenly flow to the air outlet surface 7 through the flow equalizer plate 3. A fan 5 is installed in the fan cavity 8, and the fan cavity 8 is provided with an air outlet. The fan 5 provides power to push the air through the air zone 1 and the flow equalizer plate 3, and finally discharged from the air outlet.

[0033] The spacing between the flow equalizer plates 3 connected to the same air outlet surface 7 gradually increases from the end of the air zone 1 close to the fan cavity 8 to the end far from the fan cavity 8. This design can adapt to the natural attenuation of the air flow in the air zone 1, ensuring that the air flow can still maintain a certain speed and uniformity at the end far from the fan cavity 8.

[0034] Along the direction from the filling area on one side of the air zone 1 to the filling area on the other side, all the flow equalizing plates 3 extending to one end of the connecting port 4 are arranged in sequence and spaced apart, which can ensure that the airflow can be evenly guided by the flow equalizing plates 3 when flowing through the filling area, avoiding local blockage or uneven airflow.

[0035] The flow equalizer 6 can be detachably installed in the air zone 1. It is convenient to clean, maintain and replace the flow equalizer 6, which improves the reliability and service life of the equipment. The flow equalizer plate 3 realizes uniform guidance of the airflow, which improves the efficiency and stability of the airflow. This device may be suitable for occasions where precise control of airflow distribution and speed is required, such as air purification, ventilation and other fields.

[0036] In practical applications, the number, spacing, curvature and other parameters of the flow equalizer 3 can be fine-tuned according to the specific airflow requirements and equipment size to achieve the best airflow effect. In other optional embodiments, it is also possible to consider adding guide grooves, guide vanes and other structures to the flow equalizer 3 to further enhance the uniformity and stability of the airflow.

[0037] like Figure 1 As shown, the current equalizer 6 is composed of a plurality of current equalizer plates 3. Figure 1 In the posture shown, the flow equalizer 3 adopts an arc-shaped structure design with the concave side facing upward, which can not only effectively buffer the wind speed and reduce the impact of the airflow on the filler area, but also guide the airflow to be evenly distributed along the air duct, ensuring that the air intake in the filler area reaches the optimal state.

[0038] One end of the flow equalizer 3 is vertically installed at the air outlet section of the packing module 2, and the spacing between them is optimized according to the parameters such as the wind pressure, air volume and size of the cooling tower. Specifically, the spacing between the flow equalizers 3 near the fan 5 area is smaller to cope with the larger suction force in this area and prevent the moisture from being extracted due to excessive air volume; while the spacing between the flow equalizers 3 away from the fan 5 area is appropriately increased to ensure that the air intake in this area is sufficient to meet the cooling needs. The flow equalizer 6 adopts a modular structure as a whole, and each flow equalizer 3 can be installed or replaced separately. It is not only convenient for flexible application in cooling towers of different specifications, but also reduces the cost of maintenance and replacement.

[0039] By setting a flow equalizer 6 at the air outlet section of the packing module 2, the air volume distribution of the packing module 2 in the cooling tower is significantly improved. The flow equalizer 6 makes the air volume more uniform by accurately regulating the airflow, thereby improving the overall cooling efficiency of the cooling tower. In addition, the flow equalizer plate 3 of the flow equalizer 6 also avoids the problem of moisture being extracted due to excessive suction in the area near the fan 5, effectively reducing the water consumption of the cooling tower and reducing the adverse impact on the environment.

[0040] After installing the flow equalizer 6, its significant effect is reflected in reducing the problem of cooling efficiency reduction and water extraction caused by uneven air volume distribution, thereby greatly improving the operating efficiency of the cooling tower and the utilization rate of water resources. The following are several specific application examples:

[0041] Application example 1: Cooling tower of thermal power plant

[0042] In thermal power plants, cross-flow cooling towers are used for the cooling process of circulating cooling water. However, the original cooling tower has the problem of uneven air volume distribution, that is, the air volume in the filler area close to the fan cavity 8 is too large, resulting in excessive extraction of cooling water, increasing water consumption; while the air volume in the filler area far from the fan cavity 8 is insufficient, reducing the cooling efficiency. When the cross-flow cooling tower with a flow equalizer is used in the cooling tower of a thermal power plant, the filler module 2 and the flow equalizer 6 are introduced, and the air volume distribution is significantly improved:

[0043] The flow equalizer 6 and the flow equalizer plates 3 have a smaller spacing in the area close to the fan cavity 8 and a larger spacing in the area far from the fan cavity 8, so that the air volume distribution of the filler module 2 is more uniform and the overall cooling efficiency is improved by about 12%.

[0044] The arc-shaped flow equalizing plate 3 design effectively reduces the problem of moisture being extracted with the air flow, reducing the monthly water consumption by about 5-8%, significantly saving the water replenishment cost.

[0045] After the flow equalizer 6 is installed, the air flow distribution of the cooling tower air duct tends to be stable, the service life of the filler module 2 is extended by about 20%, and the number of equipment maintenance times is reduced.

[0046] Application example 2: Petrochemical plant cooling tower

[0047] The cooling tower of a petrochemical plant has high cooling requirements for chemical equipment, and the fan 5 needs to operate at high power. Under high wind speed conditions, the water loss in the packing module 2 is serious, resulting in high water consumption and increased humidity in the surrounding air. The cross-flow cooling tower with a flow equalizer is used in the cooling tower of the petrochemical plant. After the packing module 2 and the flow equalizer 6 are introduced:

[0048] The flow equalizer 6 and the flow equalizer plate 3 are designed according to the cooling tower structure and air volume requirements, and are evenly distributed on the outlet surface of the filler module 2 in an upward arc shape, effectively controlling the air flow velocity in the area close to the fan cavity 8, increasing the air intake in the remote area, and reducing the air volume difference in each area of ​​the filler module 2 to within ±8%.

[0049] The flow equalizer 6 effectively prevents moisture from being drawn into the air when the power of the fan 5 is too large, reduces the humidity in the area around the cooling tower, and reduces the impact on the factory environment.

[0050] Under the premise of achieving uniform air volume distribution, the load demand of the cooling tower fan 5 is reduced, and the power setting is reduced by about 10%, which significantly reduces energy consumption.

[0051] Application Example 3: Data Center Cooling Tower

[0052] The data center uses a cross-flow cooling tower to meet the heat dissipation requirements of the server equipment. However, the long-term high-speed operation of the fan 5 causes the water in the area near the fan 5 of the filler module 2 to be drawn into the air duct, forming water mist and being carried out of the cooling tower, resulting in low cooling efficiency and waste of water resources. The cross-flow cooling tower with a flow equalizer is used in the data center cooling tower. After installing the filler module 2 and the flow equalizer 6:

[0053] The flow equalizer 6 improves the air volume distribution, making the air volume in the filler area uniform, and the cooling efficiency of the cooling tower is increased by about 15%, effectively meeting the cooling needs of the data center.

[0054] Under the action of the arc flow equalizing plate 3 of the flow equalizer 6, the airflow is stable, the problem of water being extracted is avoided, the water loss is reduced by about 10%, and a large amount of water resources is saved.

[0055] After the airflow in the cooling tower air duct is stabilized, the operation status of the water pump and the fan 5 is more stable, the equipment operation stability is improved, and the maintenance times are reduced by about 30%.

[0056] In summary, the application of the flow equalizer 6 in the cooling tower significantly improves the uniformity of air volume distribution, reduces water consumption and energy consumption, extends the service life of the equipment, and reduces maintenance requirements. It has broad application prospects and significant economic benefits.

[0057] Example 2

[0058] In another typical embodiment of the present invention, Figure 1 As shown, a working method of a cross-flow cooling tower with a flow equalizer is provided, using the cross-flow cooling tower with a flow equalizer as in Example 1.

[0059] A method for operating a cross-flow cooling tower with a flow equalizer, comprising:

[0060] The packing module 2 is installed in the tower body, the packing area is filled with packing, and the flow equalizer 6 is installed in the air area 1 of the packing area;

[0061] After the fan 5 is installed in the fan cavity 8, the fan 5 is used to form a negative pressure in the fan cavity 8;

[0062] The airflow passes through the air inlet surface, the filler area, the air outlet surface 7, the flow-averaging air duct, the connecting port 4 in sequence and then enters the fan cavity 8. The airflow is cooled when passing through the filler area.

[0063] The airflow passing through the air outlet surface 7 and entering the air zone 1 is divided into multiple airflows by the flow equalizing plate 3, and then enters the fan cavity 8 after passing through multiple flow equalizing air ducts, so that the air volume in the air zone 1 and the filler zone is evenly distributed.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cross-flow cooling tower with a flow equalizer, characterized in that: The utility model comprises a tower body and a filling module installed on the tower body, wherein the filling module is provided with an air zone and filling zones located on both sides of the air zone, wherein the side of the filling zone facing the air zone is an air outlet surface, and the side away from the air zone is an air inlet surface, and a connecting port is formed at the connecting position between the fan cavity and the air zone, and a flow equalizer is installed in the air zone, wherein the flow equalizer comprises a plurality of flow equalizer plates, one end of the flow equalizer plate is connected to the air outlet surface, and the other end extends to the connecting port, so that a plurality of isolated flow equalizer air ducts are formed in the air zone.

2. The cross-flow cooling tower with a flow equalizer according to claim 1, characterized in that: A plurality of flow equalizing plates are respectively connected to the air outlet surfaces on both sides of the air zone, and the flow equalizing plates are arc-shaped plates.

3. The cross-flow cooling tower with a flow equalizer according to claim 2, characterized in that: The concave side of the arc formed by the flow equalizing plate faces the connecting port, and the convex side faces the side of the air zone away from the connecting port.

4. The cross-flow cooling tower with a flow equalizer according to claim 1, characterized in that: The fan cavity is located outside one end of the air zone, forming a negative pressure zone relative to the wind inlet surface.

5. The cross-flow cooling tower with a flow equalizer according to claim 1 or 4, characterized in that: In a direction from one end of the air zone close to the fan cavity to one end far away from the fan cavity, the spacing between the flow equalizing plates connected to the same air outlet surface gradually increases.

6. The cross-flow cooling tower with a flow equalizer according to claim 1, characterized in that: The flow equalizer is detachably installed in the air zone.

7. The cross-flow cooling tower with a flow equalizer according to claim 6, characterized in that: Along the direction from the filling area on one side of the air zone to the filling area on the other side, all the flow equalizing plates extend to one end of the communication port and are arranged in sequence at intervals.

8. The cross-flow cooling tower with a flow equalizer according to claim 1, characterized in that: A fan is installed in the fan cavity, and an air outlet is provided in the fan cavity.

9. A method for operating a cross-flow cooling tower with a flow equalizer, using the cross-flow cooling tower with a flow equalizer as claimed in any one of claims 1 to 8, characterized in that: include: The packing module is installed in the tower body, the packing area is filled with packing, and the flow equalizer is installed in the air area of ​​the packing area; After the fan is installed in the fan cavity, the fan is used to form negative pressure in the fan cavity; The airflow passes through the air inlet surface, the filler area, the air outlet surface, the flow-averaging air duct, and the connecting port in sequence and then enters the fan cavity. The airflow is cooled when passing through the filler area.

10. The operating method of the cross-flow cooling tower with a flow equalizer according to claim 9, characterized in that: The airflow passing through the air outlet surface and entering the air zone is divided into multiple airflows by the flow equalizing plate, and then enters the fan cavity after passing through multiple flow equalizing air ducts, so that the air volume in the air zone and the filler zone is evenly distributed.

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