Shanghai reverse osmosis water purification treatment equipment's treatment plan for calcium carbonate scaling

Shanghai reverse osmosis water treatment equipment for the processing of calcium carbonate scale program author of the article: Reverse osmosis water treatment equipment as a new type of water purification equipment, raw water through a fine filter, granular activated carbon filters, activated carbon compression Filters, etc., are pressurized by a pump, and a reverse osmosis membrane with a pore size of 1/10000μm is used to isolate all the impurities mixed into the water such as industrial pollutants, heavy metals, bacteria, viruses, etc., so as to meet hygienic standards and become pure water . So we will encounter scaling during pretreatment. Today, let’s talk about calcium carbonate scaling. Reverse osmosis water purification treatment equipment prevents calcium carbonate scaling. Brackish water source: For the salt content of concentrated water TDS≤10000mg/L, Langelier index LSIC is used as an indicator to indicate the possibility of calcium carbonate scaling. Adjustment of LSIC: When most natural water is not treated, LSIC will be positive. In order to prevent calcium carbonate from scaling, unless a scale inhibitor is added to the inlet water of the membrane system or the preventive cleaning measures described above are taken, otherwise It must be ensured that LSIC is negative. Conditions for controlling calcium carbonate scaling: 1. LSIC<0, no need to add scale inhibitor; 2. LSIC≤1.8-2.0, add scale inhibitor alone or completely chemically soften; 3.LSIC>1.8-2.0, Add acid to LSIC to reach 1.8-2.0, then add scale inhibitor, or use chemical softening completely. Seawater source: When the salt content of concentrated water TDS>10000mg/L, brackish water or seawater source, the Steve and David saturation index is used as an indicator of the possibility of calcium carbonate scaling. Su0026DSIC adjustment: When most natural high salt content is not treated, Su0026DSIC is generally positive. In order to prevent calcium carbonate from scaling, Su0026DSIC must be changed to negative by adding acid. If calcium carbonate is prevented by adding a scale inhibitor In the case of precipitation, the Su0026DSIC value can be a positive value, and the larger allowable Su0026DSIC value and the required dosage of scale inhibitor. If the above conditions cannot be met, the following measures can be taken: 1. Reduce the recovery rate and know that the Su0026DSIC value meets any of the above conditions; 2. Use lime or lime-soda ash softening method to remove the calcium hardness and alkalinity in the incoming water until The Su0026DSIC value meets any of the above conditions; 3. Add acid to the feed water until the Su0026DSIC value meets any of the above conditions. For seawater desalination systems, sulfuric acid is usually added in an amount of 10mg/L to reach ph7, so that the concentrated water Su0026DSIC can guarantee a negative value. The environmental protection water treatment equipment company reminds you: reverse osmosis equipment is a more commonly used water purification equipment, and many problems will be encountered during the application process. Welcome to follow our website for more information.