How many classifications are there for closed circuit cooling towers? What are the main components o

Closed circuit cooling towers can be classified according to different classification standards, and the common classification methods are as follows:

1.According to the classification of circulating water: it is divided into two types: single-cycle closed cooling tower and double-cycle closed cooling tower.

The single-cycle closed circuit cooling tower has only one set of circulation system, and the circulating water directly dissipates heat through the cooling tower; The dual-cycle closed circuit cooling tower has two sets of circulation systems, namely the main cycle and the auxiliary cycle, the main cycle is responsible for transporting hot water to the cooling tower for heat dissipation, and the auxiliary cycle is responsible for transporting cooling water to the main cycle for cooling.

2.According to the classification of structural form: it is divided into two types: vertical closed circuit cooling tower and horizontal closed circuit cooling tower.

The structural form of the vertical closed circuit cooling tower is similar to the tower shape, which is usually taller and occupies less space; Horizontal closed circuit cooling towers are similar in structure to a rectangular shape, which is usually low and takes up more space.

3.According to the classification of heat dissipation mode: it is divided into two types: dry closed circuit cooling tower and wet closed circuit cooling tower.

The dry closed circuit cooling tower blows the outside air into the cooling tower through a fan and exchanges heat with the circulating water to dissipate heat; Wet closed circuit cooling towers spray water evenly on the packing through nozzles, and use the contact between water and air to exchange heat to dissipate heat.

4.According to the classification of packing materials: it is divided into two types: plastic packing closed circuit cooling tower and metal packing closed circuit cooling tower.

The packing of plastic packing closed circuit cooling tower is usually made of plastic, which has the characteristics of corrosion resistance and high temperature resistance; The packing of metal-packed closed circuit cooling towers is usually made of metal, which has the characteristics of corrosion resistance and wear resistance.

Different types of closed circuit cooling towers have different characteristics and scope of application, which need to be selected according to the actual situation.

Closed cooling tower (also known as evaporative air cooler or closed cooling tower) is a tubular heat exchanger placed in the tower to ensure 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.

With the implementation of the national energy conservation and emission reduction policy and the increasing scarcity of water resources, closed cooling towers have been widely used in iron and steel metallurgy, power electronics, machining, air conditioning systems and other industries in recent years. A closed cooling tower is actually a combination of an evaporative cooling tower, a cooler and a wet cooling tower, it is a horizontal evaporative cooling tower, where the process fluid flows inside the pipe and the air flows outside the tube, and the two are not in contact with each other.

Closed circuit cooling tower is a kind of deformation and development of traditional cooling tower. The water in the reservoir at the bottom of the tower is pumped by the circulating pump and sent to the outside of the pipe to be sprayed evenly. It is not in contact with the process fluid hot water or refrigerant and the air outside the pipe, and becomes a closed cooling tower, which enhances heat and mass transfer by spraying water.

Closed circuit cooling towers are suitable for all kinds of cooling systems with high requirements for circulating water quality, and have 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 water under the tube, so that the heat and mass transfer on the air side is significantly enhanced. According to the direction of water flow and wind direction, it can be divided into:

Counter-flow closed circuit cooling tower, cross-flow closed circuit cooling tower. According to the different shell materials, it can be divided into: galvanized steel plate closed cooling tower, aluminum-zinc plate closed cooling tower, stainless steel closed cooling tower, glass fiber reinforced plastic closed cooling tower, etc.

According to the different materials of heat exchangers, it can be divided into: copper tube closed cooling tower, stainless steel tube closed cooling tower, carbon steel tube closed cooling tower, titanium tube closed cooling tower, aluminum tube closed cooling tower, etc. According to the different types of fans, it can be divided into:

Induced air closed circuit cooling tower, blast type closed circuit cooling tower.

The main components of a closed circuit cooling tower are:

Tower body: It is the shell of the closed cooling tower, which is generally made of FRP spike or steel structure, which has good anti-corrosion, waterproof, thermal insulation and aesthetic properties.

Tubular heat exchanger: It is the core component of the closed cooling tower, which generally uses copper or stainless steel pipes, which are in direct contact with the circulating water to achieve heat transfer.

Spray system: It is an auxiliary component of the closed cooling tower, which is composed of a spray pump, a spray pipe, a sprinkler head, etc., which evenly sprays the spray water on the outer surface of the tubular heat exchanger to form a water film and exchange heat with the air.

Fengchai lead system: It is the power component of the closed cooling tower, which is composed of a fan, a motor, a reducer, etc., which is responsible for sucking and discharging air into and out of the tower, and promoting the heat exchange between air and water film.

Water collection tray: It is the collection component of the closed cooling tower, which is located at the bottom of the tower body, which is used to collect the spray water after cooling and circulate it for the sprinkler system.

Control system: It is an intelligent component of the closed cooling tower, which is composed of a control cabinet, a temperature sensor, a pressure switch, etc., which automatically adjusts the operating status of the fan and spray pump according to the temperature changes of circulating water and air to ensure the efficient operation of the closed cooling tower.