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无填料喷雾冷却塔
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, significant water-saving effect 6, less maintenance, and reduced 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. .
Structure of WGFB cooling tower
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 slabs are needed, the civil structure is simplified, and the civil investment is saved.
Cooling mechanism of WGFB unfilled spray tower
The cooling effect of a cooling tower depends on three factors:
1. The ratio of the amount of cold air to the amount of cooling water (air-water ratio):
In the WGFB tower, the system resistance of the cooling tower-the total pressure of the fan is reduced to 50% of the packed tower after the removal of the packing, the tower resistance is reduced, and the axial flow fan air volume is increased to 120% of the packed tower. At the same cooling water volume, the air-water ratio Increased by 20%, practice has proven that the air-water ratio of the WGFB tower is 900: 1, and the packed tower is 700: 1 (volume ratio).
2. The specific surface area of the cooling medium (cold air) in contact with the cooled medium (water):
The WGFB tower adopts GFN high-efficiency low-pressure atomization device, and sprays water into 0.5 ~ 1mm micro at a lower pressure (the working pressure of the atomization device is only 0.03-0.035Mpa and the pressure at the zero plane of the inlet manifold is 0.08-0.15Mpa). The droplets are 5% larger than the film-like specific surface area dispersed by water by the filler, which can continuously and rapidly update the surface area of heat and mass transfer, and quickly remove the latent heat of the atomized flow.
3. Cooling time (contact time between air and water):
The WGFB tower adopts the upper spray type, and the atomization device is reasonably distributed and installed above the air inlet duct, so that the water mist particles have two processes of co-current and countercurrent in the tower, and some of the mist particles are suspended in the upper part of the spray section in the tower Therefore, the residence time of water in the tower is greatly extended, which fully guarantees the heat exchange time of cold air and water.
The design concept of the WGFB tower is based on the above three factors and abandons the shortcomings of the traditional packed tower. The cooling effect and reliability of the work tend to be ideal.
Advantages of WGFB-unfilled spray tower:
Small resistance, large cooling temperature difference, and small approximation:
As the cooling element (high-efficiency low-pressure centrifugal atomizing device) of WGFB tower sprays water into 0.5mm tiny droplets, its specific surface area is much larger than the specific surface area where water is dispersed into a film by the filler. The surface area of air and water heat transfer is large, and the water is distributed. Uniform, avoiding the uneven distribution of cooling point temperature caused by dead zone, ditch, etc. caused by aging deformation and blockage of the packing, and the cooling effect is obviously better than that of the packed tower
Low operating costs and significant energy savings:
The working pressure of the GFN low-pressure atomizing device is only 0.035 MPa, which is 0.17 MPa lower than the working pressure of the hydraulic auto-rotating atomizing device 0.2 MPa, and the power of the supporting water pump is greatly reduced. The resistance of the WGFB tower system is about 1/2 of that of the packed tower. When the cooling water volume and the fan are the same, the power of the supporting motor is reduced to 60% of the packed tower, which has a significant energy saving effect. In addition, it eliminates the costs of cleaning and replacing the packing and water distribution nozzles, and operating costs. Greatly reduced.
Due to the elimination of packing in the WGFB tower, the system resistance of the tower is reduced to 1/2 of the original:
Due to the elimination of packing in the WGFB tower, the system resistance of the tower is reduced to 1/2 of the original. In the case of the same fan, it can be known from the fan characteristic curve that the air volume has increased to 1.2 times the original. The air-water ratio is also increased to 1.2 times, so the cooling temperature difference is 2 ° C larger than that of the packed tower.
WGFB tower spray mist particles are uniform, no blockage, no maintenance, stable and reliable operation:
The WGFB tower overcomes a series of phenomena that affect the performance of the tower and process system equipment, such as aging of the packing tower, deformation and brittleness, clogging and flushing of the water distribution nozzles, and clogging of the pipes, pumps and heat exchangers by the packing chips. Its life span is longer than that of the packed tower by more than three years.
Large amount of cooling water:
That is, at the same temperature difference with the same fan, the resistance of the tower system is reduced, the air volume is increased, and the cooling water volume is increased by 20% compared with the packed tower.
Low voice, 6dB lower than packed tower:
As the static pressure of the fan is reduced, the noise of the cooling tower is 6dB lower than that of the packed tower. According to the aerodynamic principle, the fan noise L = 101gQ? ;; P2 + △ LA where: L fan noise (dB) / Q air volume (M3 / H) / P wind pressure (MMH2O) / △ LA specific noise constant from the above formula It can be seen that the magnitude of the fan noise is proportional to the logarithm of the square of the wind pressure. The higher the wind pressure, the greater the noise; otherwise, the lower the wind pressure, the smaller the noise. According to calculations, when the air volume is unchanged and the pressure of the fan is reduced from 13mmH2O to 7.5mmH2O, the noise of the fan will be reduced by 6dB. Therefore, as the pressure of the WGFB type unfilled spray cooling system is reduced, the noise of the supporting fan will also decrease Therefore, the noise of the entire cooling system is lower than that of the packed tower.
No flying water phenomenon and good environmental protection benefits:
Because the WGFB tower uses a special water collector developed by me to prevent the occurrence of flying water, avoid water loss, and also avoid the loss of chemicals in cooling water, save water resources, and protect the ecological environment.
in conclusion:
1. WGFB unfilled spray cooling tower uses advanced dispersion theory instead of traditional film formation theory.
2.WGFB unfilled spray cooling tower uses the latest large arc wave special water collector to prevent water from drifting and protect the fan.
3. WGFB unfilled spray cooling tower uses the principle of pressure balance to ensure uniform pressure at each spray point in the tower.
4. The kinetic energy recovery type wind turbine uses energy conversion to increase the speed of the wind turbine outlet, reduce the dynamic pressure of the fan inlet, save energy and improve the cooling effect.
5. Atomization layout technology According to the change of the inlet resistance, a wave-shaped layout is adopted to ensure that the atomization at each point is uniform.
6. Anti-clogging filtration technology filters large area through the inner hole diameter, and uses the backflushing effect to flush impurities from the bottom valve.
7. Compared with packed tower, it has low resistance, no packing aging, deformation, brittleness, blockage, ditch and other disadvantages. Reliable operation, easy maintenance, low noise and low operating cost.
8. Compared with the open-air spray pond, it occupies only 1/12, no water loss, large cooling temperature difference, and greatly reduced circulating water.
9. Large cooling temperature difference, 10-25 degrees, cooling water volume is 10% larger than the same period last year.
10. The WGFB unfilled spray cooling tower fan consumes less than or equal to 0.03KW / m3 / hr, and the cooling tower saves 35% of electricity. System water supply is only 2%
Unfilled spray cooling tower
Author: admin Published: 2017-08-19 09:10 Click:
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