『Original by Haichuan Translation Group】Filtration rate of cooling tower side line

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English questions: Side Stream Filtration Rate For Cooling Towers Original link: https://www.cheresources.com/inv ... for-cooling-towers/ Original author: ankur2061 Translator ID: @kid_ptd proofreader ID: @zhdw0906 @cslgwbb Final Judge ID: @yangshaoj2005 Suspended solids (appearing as particles or turbidity) are very common substances in cooling towers. Generally, such substances will settle in low-flow areas of the water system (such as cooling pools) and become a breeding ground for bacteria. Therefore, the cooling pools need to be flushed and cleaned frequently. Worse, such substances can reduce the heat transfer performance of the cooling water system, leading to a sharp increase in the use of water treatment chemicals (such as biocides), which in turn leads to increased water treatment costs. Today's cooling towers use side filtration to treat cooling water, which can be implemented through a variety of solutions. The water in the cooling pool can be circulated and filtered separately, or a side filter can be installed at the outlet of the cooling water circulation pump for treatment. Please refer to the following diagram for the bypass filtering process of the cooling tower.: If the side filter is installed at the outlet of the cooling water circulation pump, the water flow required to be processed by the side filter can be calculated according to the following formula: Metric units (liters/second): Bypass filter flow rate (L/s) = × sewage flow rate (L/s) US unit (gallon/second): Bypass filter flow rate (gpm) = × sewage flow rate (gpm) From the above formula, it can be seen that when the suspended solids content in the circulating cooling water is less than 200ppm, side filtering is not required. However, it is still recommended to install a side filter because the concentration of suspended solids in the water will gradually increase over time, or will increase periodically. The pressure sand filter with backwash function is a commonly used bypass filter equipment on cooling towers. The flushing water can be from other water sources or cooling water. When flushing with cooling water, this part of the water should be counted as part of the cooling tower blowdown. The backwash effluent produced in both cases must be sent to a wastewater treatment plant.