Closed cooling tower

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  Countercurrent closed cooling tower Composite flow closed cooling tower Cross flow closed cooling tower
Cooling form The cooling fluid forms a forced heat exchange with the tube wall to be cooled, and the spray water outside the tube absorbs heat by forming a water film and is evaporated under forced ventilation. The cooling fluid forms a forced heat exchange with the tube wall to be cooled, and the spray water outside the tube absorbs heat by forming a water film and is evaporated under forced ventilation. The high-temperature spray water that has not been vaporized flows into the heat exchange layer of the filler and is cooled by the passing air taking away the heat. The high-temperature spray water flows into the heat exchange layer of the filler and is cooled by the passing air. It then forms a forced heat exchange with the tube wall to be cooled. The spray water outside the tube absorbs heat by forming a water film and is evaporated under forced ventilation. .
Scope of application It is suitable for cooling of high and low temperature difference. Suitable for high temperature difference cooling in metallurgical foundry chemical industry. It is suitable for cooling with low and medium temperature difference. It is suitable for cooling with low and medium temperature difference.
Service life The metal outer plate is sturdy and durable, has strong anti-corrosion ability, and the copper pipe has a long service life and is not afraid of high temperatures. The metal outer plate is sturdy and durable, with strong anti-corrosion ability, and a small part of PVC filler is used for auxiliary cooling. The metal outer plate is sturdy and durable, with strong anti-corrosion ability, and a small part of PVC filler is used for auxiliary cooling.
Area The equipment is small in size, small in area, light in weight, easy to install, and easy to place. The equipment is slightly larger, easy to install and easy to place. It needs to be assembled on site, occupies a large area and is inconvenient to change the site.
Cooling pipe ratio Light copper tube, large cooling area. The main cooling is copper pipe, and a small part of PVC filler is used as auxiliary cooling. There are few copper pipes and most of them are PVC filler.

Operation principle and characteristics of closed cooling tower
 
Circulation of working medium
The hot medium flows in from the upper coil inlet, passes through the heat exchange coil, dissipates the heat to the outside air and spray water through the heat exchange coil wall, and flows out from the lower coil outlet after being cooled;
The cooled medium flows inside the coil and has no contact with the outside, which can ensure the clean state of the medium to meet the good working condition of the system;
The external circulating water is sprayed from the bottom of the equipment by a special low-lift, large-flow water pump to the outer surface of the coil through the upper water distribution system to ensure full coverage, enhance heat exchange, and effectively control the possibility of scaling;
There are air inlets around the lower part of the unit. The fresh cold air from outside enters the equipment and passes through the surface of the coil to vaporize part of the spray water. The latent heat of vaporization of the water is large, which can effectively exchange the heat inside the coil and discharge it through the fan.
 
Heat exchange coil
For heat exchange, what is needed is the heat exchange area. With sufficient heat exchange area, this will be a guarantee for the heat exchange effect; the heat exchange coil is made of copper tubes, and the pressure is 1.6Mpa after three times during the production process. Rigorous testing.
 
Excellent ventilators and air ducts
The cooling fan of the closed cooling tower adopts a special fan for the airfoil hollow axial flow cooling tower made of aluminum alloy. The angle of the fan can be adjusted according to the equipment. The fan as a whole will not be disassembled after high-strength dynamic balance and static balance tests, and the static balance shall be checked again before being assembled to the cooling tower to ensure its reliable performance.
The blades are made of hollow aluminum alloy, and the central hub is made of high-strength steel plate to ensure that the fan has sufficient strength when rotating at high speed. The streamlined blades of the wing reduce the noise of the fan while ensuring sufficient air volume and pressure.
The air duct adopts a modeling design to effectively improve the efficiency of the fan. It is made of galvanized steel. The air duct makes full use of the theory of gas fluent homogenization, and is designed in combination with engineering practice experience and measured data. Compared with the natural diffusion type air duct, the air duct eliminates the phenomenon of air flow separation, reduces the vortex area, greatly reduces the area of ​​the negative pressure area at the center of the air duct, and the wind speed distribution at the air outlet section tends to be uniform. The kinetic energy recovery value of the air cylinder is large.
The axial fan is installed on the top of the closed cooling tower. The bracket of the fan is fixed on the box frame of the closed cooling tower to make it integrated, the structure is firm, and it is conducive to later disassembly, replacement, overhaul and maintenance.
 
Electric motor
It adopts outdoor fully enclosed motors (including fans and pump motors), with protection class IP55 and insulation class: F. Fuel-free maintenance, high reliability, and long trouble-free operation time.
 
Water pump
Due to the special requirements of the closed cooling tower itself, the use of low-lift, large-flow water pumps can still maintain a small power consumption while ensuring sufficient and large spray water volume, which improves the effect of the equipment. The pump motor is an outdoor design, and the protection level reaches IP55. The water pump adopts mechanical seal, which has strong wear resistance and long life. The low point of the water pump is provided with a plugged drain port, which is convenient for stopping and draining, and prevents the volute from freezing and cracking due to water storage in winter.
 
Strong corrosion and rust resistance
After fully considering the problem of rust prevention, galvanized steel materials are adopted for steel frames, panels, etc., and meet the low temperature requirements. Therefore, this machine has good corrosion resistance and rust resistance. In order to improve the anti-corrosion, low temperature resistance and adaptability of the galvanized steel under various environmental conditions, thick galvanized steel material is used for the tower body, and the surface of the steel plate is prevented from scratches and damage during the processing, and the bright original color of the galvanized steel material is maintained , Make the appearance of the tower beautiful and generous.
 
Beautiful appearance, convenient maintenance, low operating cost
The closed cooling tower adopts steel frame structure, galvanized steel surface structure, and external fan oil injection system (oil gun injection) in the tower structure, which makes the operation and maintenance simple and convenient, and this product has the technical level of heat exchange. , To reduce the operating cost of the closed cooling tower. And the beautiful shape of the cooling tower can be harmoniously combined with the building, saving additional costs.
 
Easy installation and short construction period
Due to the modular theory and special process design, the closed cooling tower can be directly delivered in all models (divided into upper and lower parts). The flange is used for splicing at the scene, which can be directly hoisted in place, thereby reducing The construction period saves expenses.

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