NBT Closed Circuit Cooling Tower

      The main components of the counter flow closed circuit cooling tower include: upper and lower boxes, panels, spray water devices, cooling coils, water separators, bottom water tank, axial flow fans, circulating water pump and electronic water treatment instrument. During operation, the high-temperature medium water enters the cooling coil from the upper header, is cooled by the cooling water outside the pipe, and flows out from the lower header of the cooling coil. The cooling water is sent to the spray water device above the cooling coil by the circulating water pump, which is evenly distributed on the outer surface of the cooling coil to form a very thin water film. After the induced air of the axial fan, the air enters from the side of the lower part of the box (the direction of air flow is opposite to that of spray water, so it is called countercurrent type). After the spray water and air absorb the heat of the coil, their temperature rises, and part of the water changes from liquid to steam. The latent heat of evaporation takes away a lot of heat, which is absorbed by the axial flow fan and discharged into the atmosphere. The water flowing through the coil is cooled by the air entering from the side, the temperature decreases and enters the water collecting pan, and then sent to the spray water system by the circulating water pump for continuous circulation. The water vapor evaporated into the air is supplemented by the water level regulating valve.
 
      Advantage:
      1. Minimum installation cost
      • modular design to reduce hoisting time.
      • smaller footprint and lighter weight, reducing the cost of cranes, structures and vibration isolation;
      • easy to install in containers for export transportation.
      • shorten installation time by pre assembling components and ladders.
 
      2. High reliability
      A variety of durable and unique structural materials, including structure, corrosion protection system, thermosetting hybrid polymer and stainless steel options, increase service life
 
      3. Easy maintenance
      • use of external motor adjustment (including integral belt tensioner) and easily removable louvers to reduce maintenance costs
      • allow more space and inward sliding access doors without tools.