Cross flow closed cooling tower with novel water collector structure

Abstract

The utility model discloses a cross flow closed cooling tower with novel water collector structure belongs to the technical field of cooling tower device. Including the water collector unit of the exhaust transition area outer periphery, water collector unit outer periphery is the integrated unit of filler coil, and the water drain groove is located above the integrated unit of filler coil. The beneficial effects of the utility model include: water collector unit can intercept and recycle the small water droplet in the airflow with high efficiency, avoid the air with small water droplet and directly discharge outside the tower, reduce the water drift rate of cooling tower greatly, not only reduce the invalid loss of circulating cooling water, but also can reduce the influence of impurity in the floating water to the surrounding environment, reduce the fresh water supplement dosage simultaneously, alleviate the industrial water pressure.

Description

Technical Field

[0001] This utility model relates to a crossflow closed cooling tower with a novel water collector structure, belonging to the technical field of cooling tower devices. Background Technology

[0002] In my country's industrial production sector, the contradiction between water supply and demand is becoming increasingly prominent, and improving industrial water efficiency has become one of the key directions for achieving green production. Among them, circulating cooling water, as a core component of industrial water use, accounts for more than 60%, and wet cooling towers, as the core heat exchange equipment of circulating cooling water systems, directly affect the overall water efficiency of industry due to their water consumption.

[0003] Wet cooling towers mainly achieve heat exchange through direct contact between water and air. There are three typical water consumption pathways during operation: the first is evaporative heat dissipation, which is the core mechanism for heat exchange in cooling towers. When circulating water comes into contact with air in the packing layer, some of the water absorbs heat and is converted into water vapor and discharged into the atmosphere, thereby maintaining the stable temperature of the circulating water and ensuring the heat exchange needs of subsequent production processes. This first part of water consumption accounts for 65%-75% of the total water consumption of the cooling tower. Because it involves the core heat exchange principle, it is a necessary water consumption that cannot be avoided during operation. The second part is wastewater consumption. During the repeated circulation of the circulating water, impurities such as salt and suspended solids in the water will continue to accumulate. When the concentration ratio of the circulating water exceeds the equipment's tolerance threshold, it is easy to cause problems such as pipe scaling and equipment corrosion. Therefore, it is necessary to periodically discharge some high-concentration circulating water (i.e., wastewater discharge) and replenish fresh water to maintain a stable concentration ratio. This part of water consumption accounts for 10%-20% of the total water consumption and is also a necessary water consumption to ensure the safe operation of the system. The third part is drift water consumption, which refers to the small water droplets carried by the fan during exhaust. These water droplets are carried away from the circulation system by the airflow. The cooling tower has a large circulating water volume, and the total amount of drift water is also very large. Moreover, the impurities carried by the drift water may also have a certain impact on the surrounding environment. Therefore, there is significant room for reduction in this part of water consumption.

[0004] To address the need for reduced drift water consumption, existing technologies have been researched, such as the utility model patent published by the State Intellectual Property Office (application number: CN2023212325259, patent name: Novel Cooling Tower Drift Reduction Structure). This patent uses a combination of vertical corrugated packing and S-wave packing to disperse the water flow and form a liquid film. A double-layer water collector then intercepts large and small water droplets in stages, combined with optimized airflow channels to reduce wind speed, achieving air-liquid separation and drift loss control. However, this technology suffers from high assembly precision requirements for multiple types of packing and water collectors, cumbersome installation procedures, and a significant increase in airflow resistance and fan energy consumption due to the multi-layered structure, making it difficult to simultaneously achieve both low drift rate and low energy consumption. Therefore, there is an urgent need to develop a wet cooling tower technology with a simpler structure, lower energy consumption, and better drift control to further reduce circulating cooling water consumption and alleviate industrial water pressure. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a crossflow closed-loop cooling tower with a novel water collector structure that can effectively recover small water droplets and reduce the drift rate of the cooling tower.

[0006] The technical solution of this utility model is: a crossflow closed cooling tower with a novel water collector structure, including a water collector unit located on the outer periphery of the exhaust transition zone, a packing coil integrated unit on the outer periphery of the water collector unit, a water distribution trough located above the packing coil integrated unit, a plurality of water distribution holes evenly distributed on the bottom plate of the water distribution trough, an air inlet guide unit provided on the cooling tower body outside the packing coil integrated unit, a fan provided above the exhaust transition zone, and a water collection trough provided at the bottom of the packing coil integrated unit. The water collector unit includes several water collector sub-units, which are separated by partition plates. Each water collector sub-unit is formed by two water collector plates that are attached and fixed together. The surface of each water collector plate is provided with a groove-shaped structure. The groove-shaped structure includes a high-level horizontal section, an inclined section, and a low-level horizontal section in the extension direction of the groove. The groove-shaped structures of the two attached water collector plates are arranged opposite to each other to form a channel with a high-level horizontal section, an inclined section, and a low-level horizontal section.

[0007] The cross-section of the groove structure is an isosceles trapezoid.

[0008] The upper horizontal section of the channel is located near the end of the exhaust transition zone.

[0009] The direction of the low-level horizontal section and the direction of the high-level horizontal section extending towards the exhaust transition zone are both consistent with the direction of cooling water flow along the packing.

[0010] The packing coil integrated unit includes several serpentine coils distributed in upper and lower layers. The distance between two adjacent layers of serpentine coils is the pipe row spacing. Cooling tower packing adapted to the serpentine coils is provided within the pipe row spacing. The water inlet ends of each serpentine coil are all connected to the same water inlet main pipe, and the water outlet ends of each serpentine coil are all connected to the same water outlet main pipe.

[0011] The air intake guide unit includes several parallel air intake louvers, which are inclined downwards toward the cooling tower, and the top of the air intake louvers is fixed to the tower frame on the air intake side of the cooling tower.

[0012] The beneficial effects of this utility model include: 1. The water collector unit can efficiently intercept and recover small water droplets entrained in the airflow, preventing air with small water droplets from being directly discharged outside the tower, greatly reducing the cooling tower drift rate. This not only reduces the ineffective loss of circulating cooling water, but also reduces the impact of impurities in the drift water on the surrounding environment, while reducing the amount of fresh water needed and alleviating the pressure on industrial water supply.

[0013] 2. The direction of the inlet and outlet sections of the water collector is consistent with the flow direction of the cooling water in the packing. This ensures that the air flow direction remains stable when passing through the water collector, effectively avoiding turbulence caused by airflow reversal. This significantly reduces wind resistance, directly reduces the operating load of the fan, and solves the contradiction between "low drift rate and high energy consumption" in the existing technology.

[0014] 3. This structural design eliminates the need for complex multi-layer assembly, enhances the compatibility of the water collector with packing and coils, reduces the requirements for assembly precision, simplifies the installation process, reduces equipment maintenance costs and the difficulty of later repairs, and balances water conservation, energy conservation and economy. It provides strong support for the efficient operation of wet cooling tower circulating cooling water systems and meets the needs of green and low-carbon industrial development. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a structural diagram of the water collector unit; Figure 3 This is a side sectional view of the water collector unit.

[0016] The attached figures are labeled as follows: 1. Fan; 2. Drainage trough; 3. Air inlet louvers; 4. Packing material; 5. Snake coil; 6. Water collection trough; 7. Main water inlet pipe; 8. Water collector unit; 8.1. Water collection plate; 8.2. Separator plate; 8.3. Low-level horizontal section; 8.4. Inclined section; 8.5. High-level horizontal section. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-3 Further explanation of this utility model: Example A crossflow closed-loop cooling tower with a novel water collector structure includes a water collector unit 8 located on the outer periphery of the exhaust transition zone. The outer periphery of the water collector unit 8 is a packing coil integrated unit. A water distribution trough 2 is located above the packing coil integrated unit, and several water distribution holes are evenly distributed on the bottom plate of the water distribution trough 2. An air inlet guide unit is provided on the cooling tower body outside the packing coil integrated unit. A fan 1 is located above the exhaust transition zone, and a water collection trough 6 is provided at the bottom of the packing coil integrated unit. The water collector unit 8 includes several water collector sub-units. Adjacent water collector subunits are separated by a separator 8.2. Each water collector subunit is formed by two water collector plates 8.1 bonded together. The surface of each water collector plate 8.1 has a groove-shaped structure with an isosceles trapezoidal cross-section. The groove-shaped structure includes a connected high horizontal section 8.5, an inclined section 8.4, and a low horizontal section 8.3 in the extending direction of the groove. The groove-shaped structures of the two bonded water collector plates 8.1 are arranged opposite each other to form a channel with the high horizontal section 8.5, the inclined section 8.4, and the low horizontal section 8.3. The high horizontal section 8.5 of the channel is located near the exhaust transition zone. The direction of the low horizontal section 8.3 and the direction of the high horizontal section 8.5 extending into the exhaust transition zone are both consistent with the flow direction of the cooling water along the packing 4.

[0018] The water collector subunit uses two grooved water-collecting plates that are fixed together. The grooved structure includes a connected high-level horizontal section, an inclined section, and a low-level horizontal section. This design enables efficient capture and directional recovery of water droplets. The high-level horizontal section directly catches small water droplets entrained in the airflow, preventing them from passing through quickly with the airflow. The inclined section uses gravity to guide the captured water droplets to flow stably along the groove, preventing them from being re-entrained after lingering on the surface of the water-collecting plates. The low-level horizontal section concentrates and gathers the water flow, facilitating rapid return to the circulating water system. The mating water-collecting plates form a three-section channel that is highly compatible with the airflow direction. Combined with the separator 8.2 between adjacent subunits, this effectively prevents airflow turbulence within and between subunits. The separator 8.2 blocks airflow interference between subunits, ensuring that the airflow within each subunit flows smoothly along the three-section channel, reducing localized wind resistance caused by turbulence. The smooth transition design of the three-section channel further reduces airflow resistance. The water collector unit is composed of several sub-units, and the sub-units have an independent and fitted structure, which has outstanding maintenance convenience. When a single sub-unit is damaged or scaled, it is not necessary to replace the entire water collector. Only the two water collection plates of the corresponding sub-unit need to be disassembled for cleaning or replacement, which shortens the maintenance time. At the same time, the segmented design of the trough structure makes it easy to clean the impurities accumulated in the trough, avoids the water collection effect being affected by impurities, reduces long-term maintenance costs, provides a guarantee for the long-term stable operation of the cooling tower, and further enhances the economy and practicality of the technology.

[0019] The packing coil integrated unit comprises several serpentine coils 5 arranged in upper and lower layers. The distance between two adjacent layers of serpentine coils 5 is the tube spacing. Cooling tower packing 4 adapted to the serpentine coils 5 is installed within the tube spacing. The water inlet ends of all serpentine coils 5 are connected to the same water inlet manifold 7, and the water outlet ends of all serpentine coils 5 are connected to the same water outlet manifold. The integrated unit uses several serpentine coils arranged in upper and lower layers, and the adapted cooling tower packing is built into the tube spacing between adjacent serpentine coils. This design can achieve the synergistic effect of "coil heat exchange + packing reinforcement": the curved structure of the serpentine coils 5 can prolong the residence time of water in the tower and increase the contact time between water and air; while the packing within the tube spacing can further separate the airflow and waterflow, so that the gas and liquid form a finer contact interface between the layers. The inlet and outlet ends of each serpentine coil 5 are connected to the same main inlet pipe 7 and main outlet pipe, respectively. This main pipe connection structure ensures that the water flow is evenly distributed within each serpentine coil, avoiding problems such as "local overheating" or "insufficient local heat exchange" caused by flow deviation in a single pipe. The layered distribution of the serpentine coils 5 and the packing within the pipe spacing form an orderly flow channel, which can guide the airflow to pass smoothly along the interlayer, reduce local eddies caused by airflow turbulence, reduce airflow resistance, and work in conjunction with the "low wind resistance" design of the air inlet guide unit to further reduce fan energy consumption.

[0020] The air inlet guiding unit includes several parallel air inlet louvers 3, which are inclined downwards towards the inside of the cooling tower. The top of the air inlet louvers 3 is fixed to the tower frame on the air inlet side of the cooling tower. The air inlet louvers 3 can cut the external air into multiple uniform airflows, avoiding the problem of "excessive local airflow and insufficient local airflow" in traditional non-guided structures. This allows the airflow to act evenly on the packing layer and coil, improving the air-liquid contact efficiency and thus increasing the heat exchange efficiency of the cooling tower.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A crossflow closed-loop cooling tower with a novel water collector structure, characterized in that, It includes a water collector unit (8) located on the outer periphery of the exhaust transition zone, a packing (4) coil integrated unit on the outer periphery of the water collector unit (8), a water distribution trough (2) located above the packing (4) coil integrated unit, a number of water distribution holes evenly distributed on the bottom plate of the water distribution trough (2), an air inlet guide unit on the cooling tower body outside the packing (4) coil integrated unit, a fan (1) above the exhaust transition zone, and a water collection trough (6) at the bottom of the packing (4) coil integrated unit. The water collector unit (8) includes several water collector sub-units. Adjacent water collector sub-units are separated by a separator (8.2). Each water collector sub-unit is formed by two water collector plates (8.1) being attached and fixed together. The surface of the water collector plate (8.1) is provided with a groove structure. The groove structure includes a high horizontal section (8.5), an inclined section (8.4), and a low horizontal section (8.3) that are connected in the extension direction of the groove. The groove structures of the two water collector plates (8.1) that are attached to each other are arranged opposite to each other to form a channel with a high horizontal section (8.5), an inclined section (8.4), and a low horizontal section (8.3).

2. The crossflow closed-loop cooling tower with a novel water collector structure according to claim 1, characterized in that, The cross-section of the groove structure is an isosceles trapezoid.

3. The crossflow closed-loop cooling tower with a novel water collector structure according to claim 1, characterized in that, The upper horizontal section (8.5) of the channel is located at the near end of the exhaust transition zone.

4. The crossflow closed-loop cooling tower with a novel water collector structure according to claim 1, characterized in that, The direction of the low horizontal section (8.3) and the direction of the high horizontal section (8.5) extending toward the exhaust transition zone are both consistent with the direction of cooling water flow along the packing (4).

5. The crossflow closed-loop cooling tower with a novel water collector structure according to claim 1, characterized in that, The packing (4) coil integration unit includes several serpentine coils (5) arranged in upper and lower layers. The distance between two adjacent layers of serpentine coils (5) is the pipe row spacing. Cooling tower packing (4) adapted to the serpentine coils (5) is provided in the pipe row spacing. The water inlet end of each serpentine coil (5) is connected to the same water inlet main pipe (7), and the water outlet end of each serpentine coil (5) is connected to the same water outlet main pipe.

6. The crossflow closed-loop cooling tower with a novel water collector structure according to claim 1, characterized in that, The air intake guide unit includes several parallel air intake louvers (3), which are inclined downwards towards the cooling tower. The top of the air intake louvers (3) is fixed on the tower frame on the air intake side of the cooling tower.

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