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The cooling water is continuously used in the circulation system. Due to the temperature rise of water, the change of water flow speed, the evaporation of water, the concentration of various inorganic ions and organic substances, the outdoor exposure of cooling tower and cold pool to sunlight, wind and rain, dust and debris, as well as the structure and materials of equipment and other factors, will produce serious sediment adhesion Equipment corrosion and a large number of microbial breeding, as well as the formation of slime dirt blocking the pipeline and other issues. We classify them into three categories
1. Sediment in circulating cooling water system
2. Metal corrosion in circulating cooling water system
3. Microorganism in circulating cooling water system
If these problems are not solved and controlled, they will threaten and destroy the long-term production of the factory, and even cause economic losses. Therefore, we should choose a practical circulating cooling water treatment scheme to solve the above problems.
We will analyze the three kinds of problems in the high-voltage electrostatic circulating water system one by one.
Sediment and its control in circulating cooling water system
1、 Sediment in circulating cooling water system
During the operation of circulating cooling water system, various substances will deposit on the surface of heat exchanger tubes. These materials are collectively referred to as sediments. They are mainly composed of scale, silt, corrosion products and biological sediments. Usually, sludge, corrosion products and biological sediment are collectively referred to as dirt.
Therefore, we can divide the sediment in the circulating cooling water system into two categories
Dirt: dirt is generally composed of fine-grained mud sand, dust, mud like matters of insoluble salts, colloidal hydroxides, debris, corrosion products, oil, especially the dead bodies of bacteria and algae and their viscous secretions.
Scale: there are various salts dissolved in natural water, and the dissolved bicarbonate, such as Ca (HCO3) 2 and Mg (HCO3) 2, is also unstable and easy to decompose into carbonate.
