How to prevent the formation of scale in evaporative condensers

2023-03-28

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The evaporative condenser is a heat exchange device for cooling a cold storage, which is composed of components such as a fan, condensing coil, heat exchange sheet, and box. It has many advantages such as low system operating costs, saving money, and space, and is widely used by users. It can be seen in refrigeration, chemical, refining, and other industries.

The formation of scale and dirt is a common problem in the use of evaporative condensers, and due to its evaporation mechanism, it is more prone to scale than other types of condensers. Therefore, maintenance of the equipment is mainly aimed at solving the scaling problem of the condenser. Due to the continuous evaporation of water on the surface of the pipeline, which is prone to condensation, the working environment of the condenser is outdoor, and it is high temperature, humid, and prone to corrosion. Therefore, the upper and lower boxes should ensure sufficient galvanized thickness. Because continuous evaporation is prone to scaling, and scaling on the pipe surface can greatly reduce the heat exchange performance of the condenser, the following measures can be taken to solve the scaling problem of the condenser. During normal operation, it is necessary to keep the equipment pipelines clean and carry out frequent preventive inspections to maximize the maintenance and care of the condenser. To solve the problem of condenser scale, the following measures can be taken:

The most common method is to use a cantilever type evaporative condenser. During operation, due to high-frequency vibrations in the condenser, the refrigerant will automatically fall off, making it difficult to form scale or dirt to adhere to the inside of the pipe wall. Secondly, a small amount of continuous drainage devices can be used to control the concentration of calcium ions in the circulating water within a certain range, which can effectively prevent the formation of scale. Another method is to set up a precooler to control the surface temperature of the condenser tube below 40 ℃, and then use a dense water distributor to make a large amount of water film form on the surface of the condenser tube all the time, even if there is dirt, it cannot stay on the surface of the tube.