DOWEX Ion Exchange Resins WATER CONDITIONING MANUAL

More documents

Recommendations

Info

Sodium Cycle Ion Exchange Process (Water Softening) 3.3 Equipment Required Equipment includes a vessel to accommodate DOWEX MARATHON C resin, with piping, valves, chemical tank, and accessories properly engineered for economical balance of resin capacity and chemical efficiency, and proper regeneration. To design co-current or counter-current plants under different operating conditions, correction factors for the specific conditions can be applied as described below. 3.4 Softener Design for Co-current and Counter-current Operation To design a co-current or counter-current plant, determine the resin operating capacity based on one reference set of operating conditions and then apply correction factors for the specific conditions of the design. The reference conditions are: • Linear flow of 12 m/h (5 gpm/ft 2 ) or 16 bed volumes/h • Temperature 68°F (20°C) • 500 ppm TDS feed • 30-inch (75-cm) resin bed depth • 10% NaCl regenerant at 25 min contact time • Capacity total hardness (TH) endpoint of 3% (15 ppm CaCO3) for co-current operation. The particular conditions applying to the softener (e.g. temperature, oxidants) may impact the choice of resin, and these conditions should be considered before proceeding with the design. 3.4.1 Co-current Design 1. From Figure 2 to Figure 4, determine the level of regenerant required for the particular water feed TDS to give an acceptable hardness leakage. Figure 2. Hardness leakage in co-current operation for DOWEX MARATHON C. DOWEX Ion Exchange Resins 20 Water Conditioning Manual
Sodium Cycle Ion Exchange Process (Water Softening) Figure 3. Hardness leakage in co-current operation for DOWEX MARATHON C-10. Figure 4. Hardness leakage in co-current operation for DOWEX MARATHON MSC. DOWEX Ion Exchange Resins 21 Water Conditioning Manual
Page 1 and 2: Dow Liquid Separations DOWEX Ion Ex
Page 3 and 4: TABLE OF CONTENTS 1 Introduction to
Page 5 and 6: TABLE OF TABLES Table 1. Terms comm
Page 7 and 8: Introduction to Ion Exchange 1 INTR
Page 9 and 10: Terms, Acronyms, And Abbreviations
Page 19: Sodium Cycle Ion Exchange Process (
Page 23 and 24: Sodium Cycle Ion Exchange Process (
Page 25 and 26: Sodium Cycle Ion Exchange Process (
Page 27 and 28: Brackish Water Softening Using H2SO
Page 29 and 30: Brackish Water Softening Resin oper
Page 31 and 32: Dealkalization: Salt Splitting Proc
Page 33 and 34: Dealkalization: Weak Acid Cation Re
Page 35 and 36: Dealkalization: Weak Acid Cation Re
Page 37 and 38: Demineralization (Deionization) Pro
Page 39 and 40: Demineralization (Deionization) Pro
Page 41 and 42: The UPCORE Counter-Current Regenera
Page 47 and 48: Ion Exchange Resin Operational Info
Page 57 and 58: Ion Exchange Cleaning Procedures 10
Page 59 and 60: Ion Exchange Cleaning Procedures Re
Page 61 and 62: Ion Exchange Cleaning Procedures 10
Page 63 and 64: Ion Exchange Cleaning Procedures Ta
Page 65 and 66: Designing an Ion Exchange system fr
Page 67 and 68: Designing an Ion Exchange system As
Page 69 and 70: Designing an Ion Exchange system 11
Page 71 and 72:
Useful Graphs, Tables, and Other In
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Index 14 INDEX A Abbreviations · 9
Page 93:
Dow Liquid Separations Offices. For
show all

DOWEX Ion Exchange Resins WATER CONDITIONING MANUAL

Create successful ePaper yourself

Delete template?

Save as template?