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Views: 0 Author: Site Editor Publish Time: 2025-09-29 Origin: Site
In the operation systems of numerous industrial production and large-scale building facilities, cooling towers have always played an extremely crucial role. It is like a silent and dedicated heart, continuously supplying cooling power to the entire system to ensure that all kinds of equipment operate stably and efficiently in an appropriate temperature environment. However, as time goes by, cooling towers inevitably face the problem of aging, which not only threatens their own performance but also has a profound impact on the operational stability and economy of the entire associated system. Therefore, timely and effective maintenance and renovation work has become a key measure to re-forge the core cooling force of the cooling tower.
During the long-term operation of cooling towers, due to the erosion of various external factors and the repeated action of internal working stress, they will gradually exhibit a series of obvious aging characteristics. Firstly, in terms of the tower structure, the metal tower body may experience corrosion and rusting, leading to a decrease in the tower's strength. In severe cases, local perforation or overall deformation may occur, threatening the overall stability of the cooling tower. For FRP cooling towers, prolonged exposure to ultraviolet rays, erosion by wind and rain, and trace penetration of chemical substances will cause the gel coat layer on the surface of the FRP to age and peel off, gradually exposing and damaging the internal fiber structure, thereby reducing the weather resistance and impact resistance of the tower body.
Secondly, as a key component for achieving heat exchange between gas and water inside the cooling tower, the packing has a particularly prominent aging problem. When packing materials are exposed to a harsh environment of high temperature and high humidity for a long time, they are prone to the growth of algae, bacteria and other microorganisms. These biofilms will adhere to the surface of the packing materials, blocking the voids of the packing materials and seriously reducing the gas-water contact area and heat exchange efficiency. Meanwhile, impurities in the water such as sand, calcium and magnesium ions continuously deposit on the packing, forming scale, which further aggravates the clogging degree of the packing and greatly reduces the cooling performance of the cooling tower.
Furthermore, the fan system of the cooling tower is also hard to escape the fate of aging. During the high-speed rotation of wind turbine blades, they are subject to continuous aerodynamic impacts and wear from dust and particles in the air, which can cause scratches, deformations, and even fractures on the blade surface. Due to long-term high-speed operation and the lack of timely and effective lubrication and maintenance, the bearings of the fan will experience problems such as wear and fatigue, increasing the friction and vibration during operation. This not only reduces the efficiency of the fan but also generates significant noise, affecting the surrounding environment. In addition, as the power source of the fan, the insulation performance of the motor will gradually decline over time, which can easily cause electrical faults and threaten the safe operation of the cooling tower.
In response to the corrosion and rusting issues of metal tower bodies, maintenance personnel first need to carry out a comprehensive rust removal treatment on the tower body. Methods such as mechanical grinding and chemical rust removal can be adopted to thoroughly remove the rust and corrosion layers on the surface of the tower body. Then, based on the degree of damage to the tower body, select appropriate anti-corrosion coatings for application, such as epoxy zinc-rich primer, polyurethane topcoat, etc., to form a strong anti-corrosion protective film, effectively preventing further erosion of the tower body by oxygen, moisture and chemical substances. For areas with local perforations or deformations, welding, repair and other processes should be adopted for restoration, and after the restoration, the anti-corrosion treatment of the area should be strengthened.
For the aging repair of FRP tower bodies, the aged gel coat layer and damaged fiber parts on the surface should be carefully removed first. Then, special FRP repair materials should be used and the repair and reinforcement should be carried out in accordance with strict process requirements to ensure that the structural integrity and strength of the tower body are restored to the original level. At the same time, a new layer of anti-ultraviolet and anti-aging gel coat can be re-sprayed on the surface of the tower body to extend the service life of the FRP tower body.
When the packing is severely aged and clogged and its performance cannot be restored through conventional cleaning methods, resolutely replacing it with new packing is the key to improving the heat exchange efficiency of the cooling tower. When choosing new packing materials, factors such as their material properties, heat exchange performance, anti-clogging ability and service life should be comprehensively considered. Currently, the common high-efficiency packing materials in the market include PVC cross-flow packing and counter-flow packing, etc. They have the advantages of large specific surface area, uniform distribution of air and water, and are not prone to clogging. During the process of replacing the packing, it is necessary to strictly follow the operating procedures to ensure that the packing is installed firmly and flat, avoiding any gaps or misalignment that may affect the heat exchange effect.
For packing materials that still have certain application value but have clogging problems, a combined method of chemical cleaning and physical cleaning can be adopted for treatment. Chemical cleaning can utilize specialized descaling agents, bactericides and other chemical agents to dissolve the scale, biofilm and impurities on the surface of the filler. Physical cleaning can be carried out by using high-pressure water gun flushing, air-water backwashing and other methods to thoroughly remove the dirt and impurities from the cooling tower after cleaning. Through this comprehensive cleaning method, the heat exchange performance of the packing can be restored to a certain extent and its service life can be prolonged.
The maintenance and renovation of wind turbine blades can be carried out in a targeted manner based on the damage conditions of the blades. For slightly worn blades, grinding and repair treatments can be carried out, and a wear-resistant coating can be sprayed on the blade surface to enhance its wear resistance and corrosion resistance. For severely deformed or broken blades, new ones should be replaced in a timely manner, and it is necessary to ensure that the material, size, weight and dynamic balance performance of the new blades match those of the original ones to guarantee the stable operation of the fan. After replacing the blades, a comprehensive dynamic balance test and debugging of the fan are also required to ensure that the vibration and noise of the fan are controlled within a reasonable range during operation.
The maintenance and replacement of fan bearings should select reliable quality bearing products suitable for the working conditions of the cooling tower, and strictly follow the bearing installation process requirements for installation and commissioning. During the installation process, it is necessary to ensure that the bearings are well lubricated. Appropriate grease can be used for filling, and the bearings should be inspected regularly and the grease replenished. At the same time, conduct a comprehensive inspection and maintenance of the fan motor, including checking the motor's insulation performance, winding resistance, bearing condition, etc., and promptly repair or replace any damaged motor components. In addition, to enhance the operational efficiency and intelligence level of the fan system, it is advisable to consider frequency conversion transformation of the fan motor. This will automatically adjust the fan speed based on the actual operating conditions of the cooling tower, achieving the goal of energy conservation and consumption reduction.
