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  Valv

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.