water treatment 3

8/11/2019 Water Treatment 3

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WATER TREATMENT SYSTEM



ANTISCALANT

NaOH

RAW WATER

CLEAN WATER POOL

CLEAN WATERBUFFER

TANK

ROINLETTANK

REVERSE OSMOSIS SYSTEM

CHEMICAL PRETREATMENT SYSTEM

DEMINERALIZATION TRAIN

CONDENSATE POLISHER

TIPCORETURN

CONDENSATE

ULTRAPURE

WATERTANK

PURE WATER

TANK

ACFILTER

CATIONEXCHANGER

CO2REMOVER

ANIONEXCHANGER

MIXEDBED

POLISHER

SOFTENER

ANTHRACITEFILTER

COND. AC

FILTER

COND.CATION

EXCHANGER

COND.MIXED BEDPOLISHER

COOLINGTOWER MAKE

UP

RAPID MIXER

CLARIFIER



RAW WATER

• Water Qualities:

pH: 7.00 – 8.00Conductivy: around 200 μs/cm

Silica: around 100 ppb

Turbidity: around 10 NTU



ANTHRACITE FILTER

• Remove residual

precipitates• Reduces turbidity to

acceptable level

• Backwash every after 20– 24 hours of service



CHEMICALPRETREATMENT

• CoagulationCoagulants: FeCl3 and Na2 AlO3

• Flocculation

Flocculant: Polymer • Clarifier (Sedimentation)

▫ Separates floccs from water by clarication



REVERSE

OSMOSIS

SYSTEM

• SOFTENER

Regenerant used: HCl

Water quality: pH: 2.00-3.00

Conductivity: around 300μs/cm

Turbidity: ≤ 1 NTU

• RO Inlet Tank

▫ Water quality

pH: 6.00 – 9.00

Conductivity: ≤ 300 μs/cm

Silica: around 100 ppm

• Cartridge Filters Used primarily to removeparticulate marterial from fluids thatcan damage RO membranes.

• Reverse Osmosis Water Quality:

▫ pH: 6.50 – 8.00

▫ Conductivity: ≤ 50 μs/cm

▫ Silica: < 20 ppm



CLEAN WATER POOL

• Capacity of 4500 m3

• Water quality▫ pH: 7.00 – 8.00

▫ Conductivity: <570μs/cm

▫ Silica: < 40 ppm



DEMINERALIZATION TRAIN

Activated Carbon Filter

• Effective in removing chlorine andsome heavy metal such as iron andcopper

CO2 Remover

• lessen the load of Anion byremoving carbonic acid in water

Cation Exchanger

• Removes positive ions

• Upward Flow

• Type of Resin: H+ based

resin• Regenerant: HCl

Anion Exchanger • Removes negative ions• Water Quality:

▫ pH: 6.0 – 8.5▫ Conductivity: <5 μs/cm▫ Silica: <20 ppb

• Regenerant: NaOH



MIXED BED POLISHER

• contains both cation andanion resin mixed togetherin a single vessel

• Water Quality

▫ pH: 6.0 – 8.0▫ Conductivity: <0.3 μs/cm

▫ Silica: <20 ppb



CONDENSATE POLISHER

• remove corrosion products that couldcause harmful deposits

• return condensate from TIPCOquality:

▫ pH: 8.5 -9.2

▫ Conductivity: 5 < μs/cm

▫ Silica: <100 ppb

• TREATED water quality

▫ pH: 5.6 – 7.5

▫ Conductivity: <0.3 μs/cm

▫ Silica: <20 ppb



ULTRA PURE WATER TANK

• Finished product of Water Treament System

• Water quality

▫ pH: 5.8 – 8.5

▫ Conductivity: <1.5 μs/cm

▫ Silica: <20 ppb



BACKWASHING

1. Water is drained to a level that is above the surface of the

filter bed.

2. Compressed air is pushed up through the filter materialcausing the filter bed to expand breaking up the compacted

filter bed and forcing the accumulated particles into

suspension

3. Clean backwash water is forced upwards through the filterbed continuing the filter bed expansion and carrying the

particles in suspension into backwash troughs suspended

above the filter surface.



REGENERATION

1. Backwash resin bed (for Mixed-bed polisheronly) to remove suspended solids and

decompact the bed.2. Inject regenerant diluted in appropriate water

quality.3. Displace the regenerant with dilution water at

the same flow rate.4. Rinse the bed at service flow rate with feed

water until the desired treated water quality isobtained.



WASTEWATER TREATMENT

SYSTEM



Buffer Pit

Clarifier

Treated Pit

Press Filter

Sludge Silo

To Sewage

Rapid Mixer

Neutralize Pit

Boiler Pit

Turbine Pit

Cooling TowerBlowndown

Tirewash Water

To Ashpond

WASTEWATER TREATMENT

SYSTEM

Filtrate (water)

Dry Cake

water treatment 3

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