The brine house section purifies salt through primary and secondary processes. In primary filtration, return brine is saturated with salt and impurities are removed through reactors, clarifiers, and anthracite filters. Secondary filtration further purifies the brine through brine filters and ion exchange resin columns. The purified brine is then stored in tanks with ion levels below specified limits before use or distribution.

1. A Brief Presentation On
Brine House Section
Ashish Chauhan

2. Content
• Introduction
• Block Diagram representation of a process
• Process Description
• Brief Description of each process

3. Introduction
• It is a very first section of Process where Salt is Purified by mainly Two
type of Processes
• After Feeding through Feed Bucket (Z015 , Z016 ) First unit process is
Saturators where Return Brine form D080 added with Salt to enhance
its concentration
Primary Filtration (Reactors Dosing , Clarifiers , Anthracite Filter )
Secondary Filtration (Brine Filters , Ion Exchange )

4. Block Diagram….

5. Process Description
Primary Brine Purification process is composed of salt conveyor system
, saturator , Retention tanks , Clarifier , Clarified brine Tank and
associated Facilities.
The Purpose of this process is to re-saturate the return brine with the
raw salt and to remove the impurities present in it . The saturated raw
brine overflows from salt saturator and flows into reactor . Chemicals
such as barium carbonate , soda ash , and caustic soda plus sludge are
dose in consequent reactors , Calcium , magnesium and other
multivalent metals cations in raw brine react with these reactant
changed into Suspended solids ( caco3, mg(OH)2, Fe(OH)2 , baso4 etc )
with flocculant while pure brine taken from top clarifier .

6. Continues ..
• Sludge works as seed crystal in order to form big size precipitation
and co Sedimentation with other impurities
• The Important chemical reaction are -
Cacl2+ Na2Co3--------CaCo3 + 2Nacl
Mgcl2+ 2NaOH --------Mg(OH)2+ 2Nacl
CaSo4+ BaCo3---------CaCo3 + BaSo4

7. Secondary Purification
• It is mainly Consist of Brine Filter And Ion Exchange Resin Column
• After Clarifier Brine is Sent to Brine Filters to remove Suspended
solids and then to Ion exchange to remove the Ionic Impurites
(Ca++,Mg++ etc)
• After that Ultra pure brine is send to D170 tank

8. Salt Go down
• Salt Go down having total capacity of 3165 MT per day .
• Per day consumption of salt is roughly around 500 ton per day
• Main distributors are dev Salt , Ruby Salt , Asha etc.
• Salt analysis is the first step to check the salt purity which is done in
LAB.

9. Saturators(D010 A & B)
• Saturators are the vessels where salt is added in a return brine stream
to increase the salt content around 300 -320 gpl .
• At saturator we check out Parameters like( Mg++ , Ca++ , PH & flow
rate)
• There are two saturators with capacity of 200 m3 each .

10. Reactors (D020 A & B)
• There are two reactors which are in series.
• In first reactor dosing of barium carbonate , soda ash and Sludge were
done which generally used to trap down Ca++ & Sulphate impurities
• In reactor 2nd there is dosing of 32% caustic soda which used to trap
down the Mg ++ Impurities present in salt .
• Reactors having equal capacity of 260 m^3.
• After 2nd reactor a reagent (magna floc ) 260 grams per hours
prepared with purified brine and added to Clarifier inlet stream.

11. Clarifier ( A 132 A & B )
• Two clarifiers are there with capacity of 1800 m^3 & 1400 M^3 .
• Which is used to settle down the Suspended Solids at the bottom
.and clear liquid(Brine) is taken from the top . Turbidity is generally at
C/o is less than 5 NTU
• Other parameters like( Excess OH-- , Excess Co3--, PH , temperature ,
Chemical Dosage rate , Brine Concentration ) are monitors in a regular
hours
• According to which dosage of chemicals , floccule are added in a Brine

13. Clarifier ( Working Principle )
• Clarifiers are the settling tanks which is used to settle down & remove with the help of
mechanical mean sediment(waste Solids) settle down by sedimentation process .Floated particles
called scum and particle collected at bottom called sludge.
• Before clarifier inlet Flocculation reagent is added to clump the suspended particles & increase its
density so it settle down particles.
• Two dominant forces acting on the solids particles settle down in tank gravity and interaction
between particles.
• Feed enters from center and moves toward upward direction due to temperature gradient so
Particles settle down due to gravity .
• Baffles are used to reduce the turbulence at inlet by reducing the inlet velocity so settling occurs
in faster rate.

14. Anthracite filters (F040 A,B,C & D)
• These are filters arrange in series used trap down the suspended particles which
is not settle down in clarifier .
• Turbidity is the main parameter used to measure at inlet and outlet & which
should be Less than 1 NTU at outlet
• Three main operation is done filtration , Backwashing & then Bed Reset .
• Three Filters operates Automatically & D need to operate Manually
• A bed of Anthracite particles is there & Brine from D040 (clarifier Storage Tank )
enters and collected to D042 ( Anthracite storage tank) .
• Normal backwash is also comes from D042 and collected to D062 tank & Bed
Reset enters from Brine Inlet & collected to D042

15. Schumaker Filters ( F140 A & B)
• Two filters are in Series which is generally in series .
• It Consist of Carbon candles which covers with Alfa cello use layer
which used to trap down suspended particles .
• There are two condition when we required for precoating.
 If flow rate above 20000 .
Or Pressure Differential >2kg/cm^2.
Filter Brine is collected to D150 .

16. Ion Exchange Colum
• After Schumaker filter Brine sent to Ion Exchange .
• It is a Cation type Ion Exchanger where Ca++ & Mg++ impurities are
trap with Resins and ultra pure Brine is Send to D170
• There are total 3 Colum where two is remain in line and one in
regeneration
• Regeneration having a schedule of 24 hrs.
• Washing(19) , Back Washing(55) 30 min , Hcl Regeneration(3/9) 1 .5
hrs ,Washing I(22) , Caustic Regeneration (2/7.9) , Washing II (22)
Waiting I , Brine filling (6.2)

17. Limit of Parameters after Ion Exchange
Sno. Parameter Limit (ppb)
1 Ca + Mg 14
3 Fe 50
4 Bi 20
5 Ni 10
6 Sr 500
7 Si 2300
8 Al 100