The wide-range adjustable desalinated water mineralization device is a water treatment equipment used to mineralize desalinated water or soft water to increase the hardness and alkalinity of the water body, thereby avoiding corrosion of metal water supply pipe networks by water bodies. Its principle is to acidify the water body with CO2 gas and then dissolve limestone and other mineral filter materials to generate calcium bicarbonate. The desalinated water mineralization process adopts a closed contact tank and a post-treatment process with quantitative CO2 supply on it. Based on the limestone dissolution kinetics model, the water volume and CO2 gas volume are regulated to achieve wide-range adjustment of alkalinity and hardness in the range of 30~120mg/L (as calcium carbonate). Its core equipment includes process pumps, CO2 storage tanks, vaporizers, CO2 gas-water mixers, countercurrent closed contact tanks, etc. It has the following advantages:
(1) The regulation technology based on the limestone dissolution kinetics model improves regulation accuracy and regulation range;
(2) The contact tank design based on the limestone dissolution kinetics model reduces equipment redundancy and is conducive to reducing equipment investment;
(3) The countercurrent closed contact tank reduces the volatilization of CO2 gas and improves CO2 utilization;
(4) The CO2 gas-water mixer improves the dispersion rate of CO2 gas, reduces the agglomeration of CO2 gas during rising, improves the reaction rate, and reduces the filter layer height;
In the water supply system, low-alkalinity and low-hardness water bodies such as desalinated water and soft water usually need to be mineralized before entering the metal pipe network. This wide-range adjustable desalinated water mineralization device is an essential technology in this field. It can achieve wide-range adjustment of alkalinity and hardness in the range of 30~120mg/L (as calcium carbonate). It can not only meet the needs of point-to-point short-distance water supply, but also meet the needs of large-scale municipal water supply, and can also meet the needs of ships, islands, etc. to improve drinking water quality.
(5) The standardized contact tank design facilitates large-scale engineering applications.
