To lay down a procedure for Defouling treatment of cation and anion resines.
This SOP is applicable to Formulations Unit
2.1.1 D.M. water plant.
Technical officer / Executive (production).
5.2 Pre – Start up
5.1.1 Use correct size spanner while loosing bolts and nuts.
5.1.2 Be careful while removing top dish and top strainer plate.
5.1.3 Use acid & alkali proof hand gloves and nose mask before handling Hcl & NaoH.
5.2 Pre-Start up
5.2.1 Stop all the pumps (Raw water, De-gasser pumps).
5.2.2 Open the valve No:6 (C.B.V 6 and A.B.V 6 for cation and anion beds respectively ) to drain the water in side the vessel.
5.2.3 Ensure the availability of chemicals (Hcl, NaoH, Nacl).
5.2.4 Ensure the availability of Raw water.
5.3.1 Remove the top dish bolts and nuts using the spanner No: 26.
5.3.2 Keep the top dish on ground and then strainer plate.
5.3.3 Remove the resin from vessels by syphoning.
5.3.4 Soak the removed resin in chemicals for 8 hrs (For cation resin prepare 10% concentration of Hcl solution and soak the cation resin in this solution. For 100 lts of anion resin prepare a solution by using 100 lts of D.M water.Dissolve 10 lts of Nacl and 1 kg of NaoH in 100 lts D.M Water. Soak the anion resin in this solution.)
5.3.5 After 8 hrs clean the resins with fresh water twice.
5.3.6 Pour the resine in the vessels.
5.3.7 Put the removed strainer plate in its original position on the top of the vessel and then top dish.
5.3.8 Put the bolts and nuts and ten tighten using the spanner No: 26.
5.3.9 Close the valve No:6 (C.B.V 6 and A.B.V 6 for cation and anion beds respectively ).
5.3.10 Start the individual pumps (Raw water and degasser pumps).
5.3.11 Incase of leakage is observed tight all nuts.
5.3.12 After completion of leak test , regeneration of individual beds to be done according to the SOP. No:XXXXXX