formula for calculate water in resins
Answers
Assuming you are referring to permanent hardness as CaCO3. Ion exchange resins have a capacity of approximately 1 equivalent per liter of resin.
Your requirement is small, you may want to consider a cartridge type system. If you do a regular column, you can buy in the market a 6" X 48" column. Fill it to about 30" height. This gives you about 14 liters of resin. You will exhaust about 4-5 liters per day. Therefore the column will last you 3 days before regeneration. Best if you contact a water softener dealer and get a self regeneration valve made by companies like Fleck, Autotrol. Minimum service flow rate will have to be 200-250 liters per hour. Most of the softener valves will be configured to automatically backwash, draw a saturated salt solution from a tank in which the water level is below the solid salt level, and rinse. If you wish to do this manually, you will need to make 30 liters of 10% NaCl (or KCl if you want the hardness to be replaced by K ions) and pump it through the column at 50 or so liters per hour. Before the brine pumping, you will need to reverse flow for 10 mins or so at 230 LPH. After the brine, you will need to rinse at same flow rate with water, then a fast flow rate of 560 LPH. If possible, use soft water for rinsing. Hope this helps......
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