Ion exchange, a well established technology for purifying water by trading ions in solution with ions, is becoming widely used in water treatment.
Ion exchange demineralization system usually consists of primary demineralization system and primary demineralization + mixed bed system.
Primary demineralization system:
First，H+ / cation exchanger exchanges cations（i.e. Ca2+,Mg2+,Na+）to discharge H+ ，then OH+ / cation exchanger exchanges anions（i.e. HCO3－，SO42-，CL-）to discharge OH+ . Various minerals within water can be nearly removed through the treatment above.
Mixed Bed Demineralization: Cation and Anion resins can be precisely mixed together in a single vessel to produce a very high water quality by the many ion exchange reactions that continually occur as the water passes through the Mixed Bed of resins. The Ratio of Cation to Anion is usually 2:1.Cation resin exchanges hydrogen (H+) for cations (i.e. Ca2+, Mg2+, Na+), while anion resin exchanges hydroxyl (OH-) for anions (i.e. HCO3－,SO42-,CL-). Hydrogen and hydroxide combine to form water, thereby purifying the incoming water.
Operating Conditions of Primary Demineralization + Mixed Bed System
|
Feed Water Pressure |
0.2～0.4MPa |
Operating Temperature |
2～40℃ |
|
Iron Content |
<0.3mg/L |
Oxygen Consumption（CODMn） |
<2mg/L |
|
Activated Fluorine |
<0.1mg/L |
Regeneration Mode |
Downstream |
|
Turbidity |
Upflow regeneration of fixed-bed, co-current flow regeneration of fixed-bed<5mg/L |
|
Cation Resin |
001×7 strong acid cation exchange resin,
Amberlite ir-120 Na-form exchange resin (Optional) |
|
Anion Resin |
201X7 OH-form strong alkaline anion-exchange resin |
Specifications of Primary Demineralization System
|
No |
Specification
|
Produced Water t/h |
Size of Cation Bed(mm) |
Size of Anion Bed (mm) |
Resin(KG) |
|
Cation Resin |
Anion Resin |
|
1 |
JB-FC06 |
0.5～0.7 |
Φ200 |
Φ200 |
30 |
25 |
|
2 |
JB-FC10 |
0.8～1.1 |
Φ250 |
Φ250 |
60 |
50 |
|
3 |
JB-FC14 |
1.3～1.5 |
Φ300 |
Φ300 |
85 |
75 |
|
4 |
JB-FC25 |
2..0～3.0 |
Φ400 |
Φ400 |
150 |
130 |
|
5 |
JB-FC40 |
3.5～4.2 |
Φ500 |
Φ500 |
235 |
205 |
|
6 |
JB-FC50 |
4.5～6.0 |
Φ600 |
Φ600 |
340 |
300 |
|
7 |
JB-FC90 |
8.5～9.3 |
Φ750 |
Φ750 |
530 |
465 |
|
8 |
JB-FC130 |
11.5～13 |
Φ900 |
Φ900 |
760 |
665 |
Specifications of Mixed Bed
|
No |
Model
|
Permeate Flow t/h |
Dimensions of Exchanger (mm) |
Resin |
|
Cation Resin KG (L) |
Anion Resin KG (L) |
|
1 |
JB-HC10 |
1.0～1.3 |
Φ200 |
10(12) |
18(25) |
|
2 |
JB-HC20 |
1.8～2.1 |
Φ250 |
20(25) |
35(50) |
|
3 |
JB-HC30 |
2.8～3.1 |
Φ300 |
30(35) |
50(70) |
|
4 |
JB-HC50 |
5.0～5.2 |
Φ400 |
50(63) |
90(126) |
|
5 |
JB-HC80 |
7.5～8.2 |
Φ500 |
80(100) |
140(200) |
|
6 |
JB-HC110 |
11.0～11.5 |
Φ600 |
115(140) |
200(280) |
Notes: Other flow available on request
