cost effective-high performance antiscalant ‘albrivap...

“Cost effective-High performance antiscalant‘ALBRIVAP® DSB (M) A’ in MSF Units”

Dr. Mohamed MatarGlobal Technical Development Manager

Overview Case Study of evaluation of ALBRIVAP DSB(M)A in MSF unit

Plant information

Monitoring operating Parameters

Monitoring Chemical Parameters

Chemical Dosing Control & Optimization

Unit Inspection & Results

Plant Information

MSF Unit Manufactured by Weir Westgarth 

Plant unit capacity 7.5 MIGD

Operating Top Brine Temperature: 105 °C – 110 °C

Evaluation Period: 3 Months

MONITORINGOperating Parameters

Monitoring Operating & Performance Parameters

MONITORINGOperative Parameters

Temperature Bahviour- TBT

Top Brine temperature has been Kept at average value of 105

MONITORINGOperating Parameters

90.0

95.0

100.0

105.0

110.0

115.0

1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 97

TBT (0C)

Days of the trial

Top Brine Temperature 

Temperature Behavior

Slight Increase on sea water temperature towards the end led to decrease in flash range

MONITORINGOperating Parameters

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95

Tempe

ratu

re

Days of the Trial

Temperature comparison

Sea Water Brine Bottom Make‐Up Flash Range

Distillate Production

Water Production has similar trend as Flash range

MONITORINGOperating Parameters

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0

500

1,000

1,500

2,000

2,500

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

FalshRan

ge oC

Distilation

prod

uction m

3/hr  

Days of the trial

Water Production vs Flash Range

Distillate Production Flash Range

G.O.R - Gained Output Ratio

G.O.R has been maintained at the average value of 9

MONITORINGOperating Parameters

6.0

7.0

8.0

9.0

10.0

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95

G.O

.R.

Days of the trial 

Gained Output Ratio

Fouling Resistance

ALBRIVAP DSB(M)a managed to keep the unit as clean as original status and retard any alkaline scale formation

MONITORINGOperating Parameters

0.00

0.50

1.00

1.50

2.00

2.50

3.00

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95

Fouling Res

istanc

e m

2 k/ w

 *10^‐4

Days of the trial 

Fouling Resistance

Brine Chemistry Monitoring

MonitoringBrine Chemistry

Chemical Dose Monitoring

The Dose rate has been successfully kept within 5% range from the target dose rate during most of the trial

MONITORINGOperating Parameters

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 97

Dos

e Rate (p

pm )

Days of the trial

ALBRIVAP® DSB(M) A Dose Rate 

Analysed dose rate Target Dose Rate Dose rate from flow

Residual Antiscalant Concentration

ALBRIVAP DSB(M)A is monitored directly from the brine by simple field testand the residual has been kept above the value of 1.5 ppm all over the trial asa safety margin.

0

1

2

3

4

5

1 6 11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86 91 96

Rec

ycle

Brine RA

P (ppm

)

Days of The Trial

Reserve Antiscalant Present (ppm)

MonitoringBrine Chemistry

Recycle Brine Concentration Ratio

The operation team were successfully managed to control the C.R less thanthe value 1.5 along the trial period

1.00

1.10

1.20

1.30

1.40

1.50

1.60

1.70

1.80

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95

Rec

ycle Brine CR

Days of The Trial

Recycle Brine Concentration Ratio

MonitoringBrine Chemistry

Loss of AlkalinityLTA values has been remained under 4 ppm most of the trial

0.0

2.0

4.0

6.0

8.0

10.0

1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 97

LTA (p

pm)

Days of The Trial

Loss of Total Alkalinity (LTA)

MonitoringBrine Chemistry

Plant Inspection& Results

BEFORE TRIAL

BRINE HEATER TUBES

AFTER TRIAL

Plant Inspection & Results

Plant Inspection&  Results

DEMISTER PAD

BEFORE TRIAL AFTER TRIAL

Plant Inspection & Results

a) Thermal Efficiency were Steady & Stable over trial period

b) G.O.R successfully maintained between 9 and 10

c) T.B.T. maintained in the range of 105-110°C

d) Albrivap DSB (M) A average dosage 2 ppm were successfully maintained

the unit clean

e) Analysis of the brine chemistry concluded that there would be no risk of

forming hard alkaline scale on the heat transfer surfaces This was confirmed

by the final inspection.

Conclusions

Thank you

Special Gratitude to DEWA team for the professional work done

Thanks to the valued Italmatch’s team members for their dedication,loyalty, commitment.

Thanks to the Co. Author Ing. Gianni Pilati “Global BusinessDevelopment manager” for his support