A cooling tower is a device that uses water as a circulating coolant and absorbs heat from a system and discharges it into the atmosphere to reduce the temperature of the water. Its cooling is the use of cold and heat exchange between water and air to generate steam. The steam volatilizes the heat and evaporates. The principle of heat dissipation, convective heat transfer and radiant heat transfer is an evaporative heat dissipation device that dissipates waste heat generated in industry or refrigeration and air conditioning to reduce the water temperature to ensure the normal operation of the system. The device is generally barrel-shaped, so it is called a cooling tower.
Divided by ventilation method: ① natural ventilation cooling tower; ② mechanical ventilation cooling tower; ③ mixed ventilation cooling tower. According to the contact mode of water and air: ①wet cooling tower; ②dry cooling tower; ③dry and wet cooling tower. According to the flow direction of hot water and air: ① counter-flow cooling tower; ② cross-flow (direct AC) cooling tower; ③ mixed-flow cooling tower According to the application field: ① industrial cooling tower; ② air-conditioning cooling tower. According to noise level: ① ordinary cooling tower; ② low-noise cooling tower; ③ ultra-low-noise cooling tower; ④ ultra-quiet cooling tower. Divided by shape: ① round cooling tower: ② square cooling tower. According to whether water and air are in direct contact: ①Open cooling tower: ②Closed cooling tower (also known as closed cooling tower, closed cooling tower). Other types of cooling towers, such as jet cooling towers, fanless cooling towers, etc.
Countercurrent tower 1. Water in the tower packing, water from top to bottom, air from bottom to top, both flow to the opposite type of cooling tower. 2. The counterflow cooling tower has good thermal performance and is divided into three cooling sections: ① The space from the water distributor to the top of the packing is relatively high, so it can still transfer heat to the air. ② Filler water and air heat exchange section. ③ The filler is poured into the water-sprinkling section of the pool, and the water is cooled in this section, which is called “tail effect”. The counter-flow tower heat exchange process is more reasonable and has higher cooling efficiency. 3. The water distribution system is not easy to be blocked, the water-filling filler is kept clean and difficult to age, the moisture recirculation is small, and anti-freezing measures are easier. Multiple units can be combined for design. In winter, depending on the required water temperature and water volume, a single unit can be combined or all fans can be stopped. 4. Easy to install and repair, low cost, and commonly used in air conditioning and industrial large and medium cooling circulating water.
Cross flow tower 1. Water in the tower packing. Water flows from top to bottom, and air flows horizontally from the outside of the tower to the inside of the tower. Commonly used in residential areas with strict noise requirements, it is the cooling cycle tower used more in the air-conditioning industry. Advantages: energy saving, low water pressure, low wind resistance, low speed motor, no dripping noise and wind noise, convenient maintenance of filling and water distribution system. 2. Multiple foundations can be arbitrarily constructed according to the shape of the building, and single or multiple cooling towers can be started according to the required water temperature. 3. It should be noted that the frame should have more filler volume when heat exchange is 40%, the filler is easy to age, the water distribution holes are easy to block, the anti-icing is not good, and the moisture return is large. The advantages of cross-flow towers are exactly the disadvantages of counter-flow towers.
Unfilled cooling tower The unique spray nozzle is installed at the upper air inlet of the cooling tower bottom, and there are two methods of spray spinning without motor supply and tower top exhaust. When the hot water is passed through the nozzle’s internal rotating blade, an internal swirling flow is generated to form a fine atomization spray, so that the mist exists, and the upward spraying also flows downward and countercurrently. Two cooling aging effects. The atomization is uniform and no hollow phenomenon, the cooling effect is stable, the power consumption is low, the drift rate is 0.01%, no filler is used, and the cost is low and the life is long. Use range Metallurgy, food, chemical industry, high turbidity, high temperature, anticorrosive cooling tower.
Enclosed cooling tower 1. Enclosed cooling tower is a deformation and development of traditional cooling tower. It is actually a combination of evaporative cooling tower, cooler and wet cooling tower. It is a horizontal evaporative cooling tower. The process fluid flows through the tube and the air flows outside the tube without contacting each other. After the water in the tower bottom reservoir is pumped by the circulating pump, it is sprayed out evenly outside the pipe. It is not in contact with the process fluid hot water or refrigerant and the air outside the tube, and becomes a closed cooling tower, which enhances the effect of heat and mass transfer by spraying water. 2. Enclosed cooling tower is suitable for various cooling systems with high requirements on circulating water quality. It has application prospects in power, chemical, steel, food and many industrial sectors. On the other hand, compared with air-cooled heat exchangers, evaporative cooling towers use the latent heat of evaporation of the water under the tubes to significantly enhance heat and mass transfer on the air side, which also has obvious advantages.
Closed cooling tower (also called evaporative air cooler) puts the tube heat exchanger in the tower, and guarantees the cooling effect through the heat exchange of circulating air, spray water and circulating water. Because it is a closed cycle, it can ensure that the water quality is not polluted, which protects the efficient operation of the main equipment and improves the service life. When the outside temperature is low, the sprinkler system can be stopped to save water.
Closed cooling tower, also known as closed cooling tower, evaporative cooler.
Unfilled spray cooling tower Product introduction: Low noise, energy saving, water saving, stable cooling effect and less maintenance. Product Details: 1. Good energy saving and cooling effect; 2. Stable cooling effect; 3. Low working water pressure, energy saving and high efficiency; 4. Low noise; 5, small amount of floating water, water saving effect is significant; 6, less maintenance, reduce production costs; 7. The new spray propelling ventilation cooling tower adopts modular building structure as a whole, and the inlet and outlet air ducts inside the tower are isolated at the lower part of the tower, which simplifies the structure of the tower, reduces the weight of the tower, and facilitates transportation and assembly. . WGFB cooling tower structure: 1. The WGFB unfilled spray cooling tower uses a high-efficiency low-pressure centrifugal atomizing device (nozzle pressure: 0.035 MPa) as the cooling element. [Replaces the traditional packing tower’s packing and water distribution device, making the entire tower almost an empty tower with a large structure. simplify. 2. WGFB unfilled spray cooling tower is equipped with atomizing device above the air inlet after removing the filler and water distribution device. The spraying direction of water is the same direction as the cold wind sucked by the axial flow fan. In the process, there are two processes of co-current cooling and counter-current cooling. 3. GFN unfilled spray cooling tower sprays water into a mist through an atomizing device, so that the tiny particles of air and water are uniformly contacted, and the filler tower distributes water on the filler through a water distribution nozzle to contact the cold air in a film shape. . 4. Due to the cancellation of the filler of the GFN tower, the load of the tower body is greatly reduced, no more supporting beams and plates are needed, the civil structure is simplified, and the civil investment is saved.
Cooling towers are mainly used in air-conditioning cooling systems, refrigeration series, injection molding, tanning, foaming, power generation, steam turbines, aluminum profile processing, air compressors, industrial water cooling and other fields. The most widely used are air-conditioning cooling, refrigeration, plastic chemical industry . The specific division is as follows: A. Air room temperature adjustment categories: air-conditioning equipment, cold storage, refrigerating rooms, refrigeration, heating and cooling air-conditioning, etc .; B. Manufacturing and processing: food industry, pharmaceutical industry, metal casting, plastic industry, rubber industry, textile industry, iron and steel plant, chemical industry, petrochemical products, etc .; C. Mechanical operation cooling category: generator, steam turbine, air compressor, oil compressor, engine, etc. D. Other industries The role of the cooling tower is to exchange the cooling water carrying waste heat with the air inside the tower body, so that the waste heat is transmitted to the air and dispersed into the atmosphere.