Operating flow rate of counterflow regenerated strong acid cation exchanger
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According to the specifications, the operating flow rate for counter-current regeneration strong acid cation exchangers is 20–30 m/h. When the salinity of the raw water is high, if a low flow rate of 20 m/h is maintained, the maximum resin height is 2.5 meters; in this case, the calculated operating time is less than 8 hours. The regeneration cycle is short. If it is necessary to extend the operating time, there is no possibility of increasing the size of the equipment; could the water inflow rate be reduced so that the flow velocity is below 20 m/h? What is the impact of the ion exchanger when operating at less than 20 m/h? If that’s not possible, can’t ion exchange be used for desalination of water with a high salt content? In that case, reverse osmosis must be used instead. For those who have carried out ion exchange desalination, what is the highest salt content of the raw water? Has anyone taken >500mg/j?
You mean that the filtration rate during operation is 20–30 m/h. When the ion concentration of the raw water is too high, the filtration rate needs to be much lower, and the backwashing frequency must be higher.
A full-room bed system could be considered; we are now able to achieve a salt content of 800 mg/L. It is also relatively economical to operate.
What is a full-room bed? What is the operating flow rate? What can be the maximum diameter? And what can be the resin height?
The flow rate can’t be too low; a value below 20 m/s already exceeds the minimum requirement specified in the standards.
I’m also wondering why the minimum flow rate is 20 m/h – what would happen if it were lower? ? ? Those who also want standard writing guidelines, please come and explain! ! !