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CHEMICAL CLEANING Reverse RO System and EDI System
RO CLEANING – CITRIC ACID Preparation of Cleaning solution: Prepare a solution of 2% (By weight) of Citric acid (C6 H8 O7 ). This is useful in removing of inorganic scales and organic based colloidal material. Recommended quantity is 7.7 kg Citric acid (100 % powder) which is to be added to 380 liters of dilution water. Adjust the pH using Ammonium Hydroxide to pH of 4.
Procedure: Take RO permeate or DI water in a tank. Ensure that water should be free of chlorine.
Initially flush some amount of water through the RO pressure vessel for a period of 5 min with reject and permeate to drain.
Again take fresh RO permeate water or DI water in tank.
Prepare solution as mention above in tank.
Connect a hose to concentrate outlet and put other end to cleaning tank.
Connect a hose to the permeate outlet and put other end to cleaning tank.
Circulate the chemical for 1 hour from tank to RO using external pump (Not high pressure pump). Ensure that the pressure during cleaning at the inlet of the RO should not exceed 4 bar. This can be done by adjusting the feed valve to the membrane housing.
After circulation flush the system until RO conductivity is < 20 us/cm.
RO CLEANING – NaOH Preparation of Cleaning solution: Prepare a solution of 1 % (By weight) of NaOH & Tipol this is useful in removing of organic foulant of natural organic, colloidal foulant.
Procedure: Take RO permeate or DI water in a tank. Ensure that water should be free of chlorine.
Initially flush some amount of water through the RO pressure vessel for a period of 5 min with reject and permeate to drain.
Again take fresh RO permeate water or DI water in tank.
Prepare solution as mention above in tank.
Connect a hose to the concentrate outlet and put other end to cleaning tank.
Connect a hose to the permeate outlet and put other end to cleaning tank.
Circulate the chemical for 1 hour from tank to RO using external pump (Not high pressure pump). Ensure that the pressure during cleaning at the inlet of the RO should not exceed 4 bar. This can be done by adjusting the feed valve to the membrane housing.
After circulation flush the system until RO conductivity is < 20 us/cm.
EDI Cleaning EDI cannot be cleaned with chemical, once EDI chocked it has to be replaced.
Categories Engineering Tags Aberdeen , Aberdeenshire , Abu Dhabi , Abu Dhalouf , Abu Hamour , Abu Samra , ABUJA , ACCRA , Acre , Ad Dawhah al Jadidah , ADDIS ABABA , Adelaide , AFGHANISTAN , Agra , Agrigento , Ahmedabad , Aïn Beïda , Ain Khaled , Ain Sinan , Ajman , Ajman and Ra’s al-Khaimah , Ajmer , Al Ain , Al Aziziya , Al Bidda , Al Daayen , Al Dafna , Al Ebb , Al Egla , Al Gharrafa , Al Ghuwariyah , Al Hilal , Al Jasrah , Al Jeryan , Al Karaana , Al Kharaitiyat , Al Kharayej , Al Kharrara , Al Kheesa , Al Khor , Al Khulaifat , Al Luqta , Al Mamoura , Al Mansoura , Al Markhiyah , Al Mashaf , Al Masrouhiya , Al Mearad , Al Messila , Al Mirqab , Al Najada , Al Nasraniya , Al Qassar , Al Rufaa , Al Sadd , Al Sailiya , Al Sakhama , Al Seej , Al Shagub , Al Souq , Al Tarfa , Al Thakhira , Al Themaid , Al Thumama (Al Wakrah) , Al Thumama (Doha) , Al Utouriya , Al Waab , Al Wajba , Al Wakrah , Al Wukair , Al Zubarah , Al-Shahaniya , Alagoas , ALBANIA , Alberta , Alessandria , ALGERIA , 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