The following gives the generalized description of the processes for removal of dissolved solids by the ion exchange process. The ion exchange process involves two stages of demineralization. The first stage is the removal of cations from water by the cation exchange process. The second stage is the removal of anions from water by the anion exchange process.
Demineralization or deionization is the process of removing dissolved salts from water by using Ion Exchange Resin . Basically Ion exchange demineralization is a two step process with both Cation and Anion resin . The raw water called influent water is first passed through the Cation resin bed containing SAC Resin in H + form . Ca , Mg & Na are removed and the salts are converted to their respective acids .The corresponding acid containing anions like Cl , SO4 , NO3 are removed by passing the cation effluent through Anion column containing Anion resin in Hydroxyl Form. The hydrogen ion from cation neutralizes the hydroxyl ion and produces pure water.
Ion exchange is an equilibrium reaction which is reversible . In the hydrogen cation Resin , Cations like Ca , Mg are exchanged for H ions. After some period The resin is not able to exchange any more ions. The bed is exhausted . The Resin has to be brought back to its original form . This is done by the regenerating the resin with strong acid and the process of restoring the resin back to its original condition is called
Regeneration. Similarly the Anion resin is restored back after exhaustion by regenerating it with Alkali.
|
MODELS |
Numa DM 30 |
Numa DM 60 |
Numa DM 80 |
Numa DM 100 |
|
Resin Qty. |
30 Ltr |
60 ltr. |
80 ltr. |
100 ltr. |
|
OBR @ 100 ppm ionic Load |
12,000 ltrs |
24,000 ltrs. |
32,000 ltrs. |
40,000 ltrs |
|
Min. Working Pr. |
2.0Kg/cm² |
2.0 Kg /cm² |
2.0 Kg /cm² |
2.0 Kg/cm² |
|
Max. Working Pr. |
4.0Kg/cm² |
4.0 Kg /cm² |
4.0 Kg /cm² |
4.0 Kg/cm² |
|
Vessel |
FRP |
FRP |
FRP |
FRP |
|
Resin Make |
Thermax |
Thermax |
Thermax |
Thermax |
|
Reagenerant Qty Acid & Alkali |
HCL / 9 Kg NaOH / 3 Kg |
HCL / 18 Kg NaOH / 6 Kg |
HCL / 24 Kg NaOH / 8 Kg |
HCL / 30 Kg NaOH / 10 Kg |
|
Type of Valve |
20 NB |
20 NB |
20 or 25 NB |
25 or 40NB TM |
|
Max. Flow Rate. m3/Hr |
1.5 m3 / Hr. |
1.5 m3 / Hr. |
1.5 m3 / Hr. |
2.5 m3 / Hr |
|
MODELS |
Numa DM 150 |
Numa DM 200 |
Numa DM 250 |
Numa DM 330 |
|
Resin Qty. |
150 Ltr |
200 ltr. |
250 ltr. |
330 ltr. |
|
OBR @ 100 ppm ionic Load |
60,000 ltrs |
80,000 ltrs. |
1 Lacs ltrs. |
1.32 Lacs ltrs |
|
Min. Working Pr. |
2.0Kg/cm² |
2.0 Kg /cm² |
2.0 Kg /cm² |
2.0 Kg/cm² |
|
Max. Working Pr. |
4.0Kg/cm² |
4.0 Kg /cm² |
4.0 Kg /cm² |
4.0 Kg/cm² |
|
Vessel |
FRP |
FRP |
FRP |
FRP |
|
Resin Make |
Thermax |
Thermax |
Thermax |
Thermax |
|
Reagenerant Qty Acid & Alkali |
HCL / 45 Kg NaOH / 15 Kg |
HCL / 60 Kg NaOH / 20 Kg |
HCL / 75 Kg NaOH / 25 Kg |
HCL / 100 Kg NaOH / 35 Kg |
|
Type of Valve |
25 or 40 NB TM |
40 NB TM |
40 NB SM |
40 NB SM |
|
Max. Flow Rate. m3/Hr |
3 m3 / Hr. |
3 m3 / Hr. |
|
|
3 m3 / Hr. 
4 m3 / Hr
|
MODELS |
Numa DM 500 |
Numa DM 750 |
Numa DM 1000 |
|
Resin Qty. |
500 ltr. |
750 Ltr |
1000 ltr. |
|
OBR @ 100 ppm ionic Load |
2 Lacs ltrs. |
3 Lacs ltrs |
4 Lacs ltrs. |
|
Min. Working Pr. |
2.0 Kg /cm² |
2.0Kg/cm² |
2.0 Kg /cm² |
|
Max. Working Pr. |
4.0 Kg /cm² |
4.0Kg/cm² |
4.0 Kg /cm² |
|
Vessel |
FRP |
FRP |
FRP |
|
Resin Make |
Thermax |
Thermax |
Thermax |
|
Reagenerant Qty Acid & Alkali |
HCL / 150 Kg NaOH / 50 Kg |
HCL /225 Kg NaOH / 75 Kg. |
HCL / 300 Kg NaOH /100 Kg |
|
Type of Valve |
40 NB SM |
40 NB SM |
40 NB SM |
|
Max. Flow Rate. m3/Hr |
4 m3 / Hr. |
2.0Kg/cm² |
2.0 Kg /cm² |
Note :- Inlet Water should be colourless free from turbidity, oil, grease, Organic
Matter. Treated water quality depends on Raw Water Analysis.
