Demineralized water－Primary demineralization system
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.
The primary demineralization can not produce high quality water because of its simple process, sometimes weak supervision can also have effect on the water quality.
Requirements for feed water and operating conditions of primary demineralization
|
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 |
Notes: Other flow available on request
