Acid cannot be added to the resin tower
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This post was last edited by sunjl1981 on 2013-1-6 at 20:54. I can’t add acid to the resin tower; yet all the valves are in good condition, acid drainage works fine, and the acid mixer is also okay. Does anyone know why??? -
Is the pressure drop too high, or is there something blocked somewhere?
Check step by step from the source to the resin tower; it’s likely that a pipe is blocked
Reply 1# sveeda: You need to understand that when acid is added to the resin tower, it is done on a ratio basis relative to pure water. That is, to maintain a certain ratio with water. If the water does not first reach the set flow rate, the acid supply is stopped. This includes the situation where, whenever the water flow does not reach the set minimum value, the acid flow is stopped. This is to prevent the addition of high-concentration acid from damaging the resin. Additionally, if the pressure at the acid pump outlet (behind the valve) is too low, it may also be impossible to supply acid. You need to check whether the reflux at the acid pump outlet is set too high, whether the outlet of the acid pump is set too low, and whether the acid pump is undersized; the same checks should be performed on the pure water pump as well. Another thing is to check the relevant settings of the DCS.
Sampling and analysis are carried out downstream of acid addition. Let’s take a look at the actual situation. 1 was really not added in. (Pipe blockage or incorrect operation of related valves). 2. The fake ones were not included. (The acid addition flow meter gives inaccurate readings.) Additionally: Check whether the water circuit system is functioning properly (if it works normally during other washing and back-washing processes, then the water circuit is in order)