OPERATING & REGENERATING PROCEDURE FOR

1.0 AIM
To lay down a standard operating & regenerating procedure for D. M. PLANT.
2.0 SCOPE
Maintenance Department
3.0 AREA OF OPERATION
D. M. Plant and surrounding area.
4.0 RESPONSIBILITY
Operator/Maintenance Supervisor concerned.
5.0 ACCOUNTABILITY
Maintenance Incharge.
6.0 PROCEDURE
6.1 For normal functioning of D. M. Plant open valve No. 4, 8 & 10 Cation & Anion bed 20 & 21 of mix bed.
6.2 Check the condictivity of both beds if it is satisfactory then continue the collection of D. M. Water. Limits of conductivity are < 30 _æ_ simons.
6.3 If conductivity is not satisfactory then the plant is ready for regeneration.
7.0 ENGG. DEPARTMENT
7.1 D. M. PLANT REGENERATION
A) REAGENT + PREPARATION
Cation : 12 Lit. HCl + 24 Lit. H2O
Anion : 8 Kg NaOH + 80 Lit. H2O
B) Mix Bed
Cation : 4 Lit. Hcl + 8 Lit H2O
Anion : 2.5 Kg. NaOH + 25 Lit. H2O
8.0 PROCEDURE FOR REGENERATION
8.1 Operation Valves for Plant II
Acid Injection : Open Valve 1, 2 & 3 20 min.
Acid Rinse : Open Valve 1 & 3 20 min.
Caustic Injection : Open Valve 4, 5, 6 & 7 30 min.
Caustic Rinse : Open Valve 4, 5 & 7 30 min.
Final Wash : Open 4, 8 & 9 1 Hrs.
Continue till conductivity is LT 30 _æ_s/cm2
Normal Service : Open 4, 8 & 10.
Operation valves for MIX BED
Flushing : Open 20, 22, & 18 5 min.
Back Wash : Open 11 & 12 10 min.
Caustic Inj. : Open 13, 14, & 15 15 min.
Caustic Rinse : Open 20 & 15 15 min.
Acid Inje : Open 16, 17, 18 15 min.
Acid Rinse : Open 22 & 18 15 min.
( pH 2.5 to 3.5)
Air mixing : Open 19 & 12 15 min. (0.5 Kg)
Final Wash : Open 20 & 18
Normal Service : Open 20 & 21 ( pH 5.5 to 6.5 )
Before air mixing water req. 3/4 of column & then air mixing start.
9.0 REVIEW DATE
After 2 years or when procedure is changed.