How to calculate the dosage of anti-scaling agent for reverse osmosis-Hezhong Environment (Beijing) Co., Ltd. was established in 2003

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How to calculate the dosage of anti-scaling agent for reverse osmosis

Published Time:

2023-03-02

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Reverse osmosis antiscalants are typically added to the security filters of a reverse osmosis system, that is, before the precision filters. They are added to the chemical dosing device and metered into the pipes of the reverse osmosis equipment via a metering pump. Reverse osmosis antiscalants can be used directly as a stock solution or diluted before use. The dilution ratio is not recommended to exceed 10 times, i.e., the concentration should not be lower than 10%. The recommended concentration of reverse osmosis antiscalants is generally 5-20 ppm, i.e., 5-20 g of reverse osmosis antiscalant is needed for every ton of water in the reverse osmosis equipment.

We determine the weekly usage based on the equipment usage, determine the size of the chemical dosing tank based on the weekly usage, and adjust the chemical dosing metering pump accordingly, so that the reverse osmosis chemical is steadily and continuously injected into the reverse osmosis equipment.

The formula for calculating monthly usage is: W (monthly usage ) = Q (inlet flow rate of reverse osmosis equipment ) × S (dosing concentration ) × H (operating time of reverse osmosis equipment ) × 30 / 1000 (1000 is the conversion factor between g and Kg).

Taking the inlet water volume of the reverse osmosis RO system as 100 tons as an example, we calculate the usage, i.e., the dosage, of the antiscalant for each reverse osmosis system. The monthly usage of reverse osmosis antiscalant is: 100*5*24*30/1000=360KG (5 is the dosage concentration ppm; 24 is the daily operating hours; 30 is the number of days per month; 1000 is the conversion unit g to KG).