How does the antifreeze design of FRP cooling tower ensure normal operation in winter?
Publish Time: 2025-03-19
As an important part of the industrial cooling system, FRP cooling tower faces severe antifreeze challenges in winter. In order to ensure its normal operation in cold seasons, a series of effective antifreeze design measures need to be taken. These measures are aimed at preventing the water inside the cooling tower from freezing, avoiding equipment damage, and maintaining the stability of the system.
The antifreeze design of the cooling tower should first start with the structural layout. Reasonable structural design helps to reduce the intrusion of cold air and heat loss. For example, setting a wind shield at the air inlet of the cooling tower can effectively block the direct intrusion of cold air from the outside, thereby reducing the risk of water freezing in the tower. At the same time, for countercurrent natural ventilation cooling towers, adding a water retaining eaves to the inner wall of the upper edge of the air inlet is also an effective antifreeze design, which can prevent the melted ice water from splashing out of the tower and freezing again.
In terms of circulating water systems, adopting zoned water distribution and adding bypass pipes are common antifreeze strategies. Zoned water distribution can optimize water distribution, increase the water density of the outer part of the water-sprinkling filler, improve the heat exchange efficiency of water, and thus reduce the possibility of freezing. By adding a bypass pipe, in low temperature weather, part of the circulating water can bypass the cooling tower and return directly to the system, so as to reduce the cooling degree of the water in the tower and avoid freezing.
The antifreeze design of mechanical ventilation cooling tower is more complicated. In winter, the cooling effect can be reduced by stopping the fan, reducing the installation angle of the fan blade (i.e. reducing the air volume) or using variable speed motors to prevent water from freezing. In addition, when the fan reducer has a lubricating oil circulation system, there should also be facilities for heating the lubricating oil to ensure the fluidity of the lubricating oil and prevent equipment damage due to low temperature.
In terms of control strategy, FRP cooling tower can use a temperature control system to automatically adjust the start and stop of the heater to keep the water temperature above the freezing point. At the same time, regular discharge of residual water in the cooling tower is also an effective way to prevent freezing. In the case of shutdown or long-term non-use, the residual water in the tower and pipeline must be discharged cleanly to avoid freezing and cracking of pipelines and equipment.
For cooling towers in severe cold areas, it is also possible to consider building large indoor pools or water tanks to store circulating water to reduce the exposed area of water and the heat dissipation rate. This method can not only prevent water from freezing, but also improve the temperature stability of water, which is conducive to the stable operation of the system.
In summary, the antifreeze design of FRP cooling tower needs to be considered comprehensively from multiple aspects such as structural layout, circulating water system, mechanical ventilation control and control strategy. By taking these effective antifreeze measures, the normal operation of the cooling tower in winter can be ensured, providing stable and reliable cooling services for industrial production.
