Monitoring of Cooling Water

1- Parameters of Make up Water & Cooling Water

SPECIFICATION OF MAKE UP WATER

Parameter Unit ETP Make-up Fresh Make-up

Ph 6.5-8.0 7.0-8.0

Turbidity NTU 10-50 <1.0

Talk Mg/Ltr 110-170 30-90

T Hardness Mg/Ltr 100-150 130-180

Ca Hardness Mg/Ltr 70-110 50-100

Mg Hardness Mg/Ltr 30-45 26-36

TDS Mg/Ltr 600-900 100-160

Fe Mg/Ltr 1.5-3.0 <0.1

Inorganic PO4 Mg/Ltr 0 0

Organic PO4 Mg/Ltr 0 0

TPO4 Mg/Ltr 0.2 0

Chloride Mg/Ltr 90-150 10-20

Silica Mg/Ltr 10-15 05-10

Oil Mg/Ltr <10 Nil

Zinc Mg/Ltr 0 0

FRC Mg/Ltr 0.1-0.2 0.1-0.2

TBC Counts/ml <100000 <100

SRB C/100ml <1000 NIL

SPECIFICATION OF COOLING WATER

Parameter Unit PCT TPS

Ph 7.0-7.5 7.0-7.5

Turbidity NTU <30 <15

Talk Mg/Ltr 30-90 30-90

T Hardness Mg/Ltr 150-400 200-500

Ca Hardness Mg/Ltr 100-300 150-400

Mg Hardness Mg/Ltr 50-100 50-100

TDS Mg/Ltr <1000 <1000

Fe Mg/Ltr <1.0 <1.0

Inorganic PO4 Mg/Ltr 5.0-7.0 5.0-7.0

Organic PO4 Mg/Ltr 8.0-10 8.0-10

TPO4 Mg/Ltr 13-17 13-17

Chloride Mg/Ltr <300 <300

Silica Mg/Ltr 10-100 10-100

Oil Mg/Ltr <10.0 <10.0

Zinc Mg/Ltr 1.0-2.0 1.0-1.5

FRC Mg/Ltr 0.2-0.5 0.2-0.5

TBC Counts/ml <100000 <100000

SRB C/100ml <100 <100

ORP mV 300-500 300-500

COC 2 3

2- Monitoring With Monitors

MONITORING EQUIPMENT OBSERVATION/PERFORMANCE

Bio fouling Monitor:- This equipment has been commissioned at return line for Inspection of bio fouling. Differential Pressure across biofouling monitor should not exceed more than 20% of the initial value through out the contact period.

Deposit Monitor: - This equipment has been commissioned at return line for Inspection of deposition in cooling water systems. Deposition on heater of deposit monitor should be loose in nature and deposition should be < 15mg/dm2/year. 3-CORROSION MONITORING OF COOLING WATER SYSTEM-

Corrosion coupons are installed for monitoring of corrosion in Cooling Water system. Corrosion Rate -3 mpy max. For M.S, 0.5 mpy max for Brass.

4- TEST COOLER:- This equipment has been commissioned at return line for Inspection of overall performance of circulating water.

5- PLANT SURVEY: - Plant survey carried out to know about the performance of critical Exchanger of the plant.