Introduction to Advances in Power Plant Chemistry · 2013-11-27 · Advances in Boiler design and...
Transcript of Introduction to Advances in Power Plant Chemistry · 2013-11-27 · Advances in Boiler design and...
Introduction to Advances in Power Plant Chemistry
Objectives and other details of modules
Duration – 90 minutes
Training aids
Power point Presentations
Objective
At the end of the session participants will be able to: Describe advances made in boilers - design & size and chemical
control limits with reference to different types / sizes of boilers for:● Feed water● Steam water cycle ● Superheated steam cycle● Condensates
List out online and offline instruments in SWAS and purpose of these instruments
Use online and offline instruments for measuring parameters related to water chemistry
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Advances in Boiler design and its implication for water chemistry
● Double Drum Boiler – early 60s – 50-100MW
● Single Drum with mud and clean compartment –
Russian design/Skoda-50, 100, 200 MW
● Single Drum Boiler- BHEL based on CE
design/Alstom/Ansaldo - 210, 250, 500 MW, 600MW
(Chinese)
● Drum less subcritical Boiler- Stain France - 500MW
● Supercritical Boiler- BHEL based on Alstom design-
660, 800 MW, MHI, Ansaldo, Toshiba, Babcock – 660
MW
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Chemical Control Limits in
Different Design Boiler For
Steam-water Cycle
CHEMICAL CONTROL LIMITS FOR FEED WATER OF 60,100 & 200 MW
SN Parameter 60 MW 100MW 200 MW
1 pH at 25oC 8.8-9.0 8.8-9.0 8.8-9.0
2 Cation Conductivity, µS/cm 0.3 0.3 0.2
3 Dissolved O2, µg/l, max 7 7 5
4 Silica, µg/l, max 20 20 20
5 Residual N2H4, µg/l 20-30 20-40 10-20
6 Total Fe, µg/l, max 10 10 10
7 Total Cu, µg/l, max 5 5 5
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CHEMICAL CONTROL LIMITS FOR FEED WATER OF 500 MW AND ABOVE
SN Parameter 500 MW
1 pH at 25oC 9.0 – 9.2
2 Cation Conductivity, µS/cm 0.2
3 Dissolved O2, µg/l, max 5
4 Silica, µg/l, max 10
5 Residual N2H4, µg/l 10 – 20
6 Total Fe, µg/l, max 10
7 Total Cu, µg/l, max 3
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CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE OF 60,100 & 200 MW
SN Parameter 60 MW 100MW 200 MW
1 pH at 25oC 9.2 – 9.7 9.2 – 9.5 9.2 – 9.5
2 Sp. Conductivity, µS/cm, at 25oC, max
30 50 30
3 Silica, mg/l, max 2.5 1.5 0.4
4 Phosphate, mg/l 2 – 6 2 – 6 2 - 4
5 Chloride, mg/l, max 1.6 1.0 1.0
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CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE OF 500 MW & ABOVE
SN Parameter 500 MW
1 pH at 25oC 9.1 – 9.4
2 Sp. Conductivity, µS/cm, at 25oC, max 20
3 Silica, mg/l, max 0.1
4 Phosphate, mg/l 1 – 2
5 Chloride, mg/l, max 0.5
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CHEMICAL CONTROL LIMITS OF SUPERHEATED STEAM CYCLE OF 60,100 & 200 MW
SN Parameter 60 MW 100MW 200 MW
1 pH at 25oC 8.8 – 9.0 8.8 – 9.0 8.8 – 9.0
2 Cation Conductivity, µS/cm, at 25oC, max
0.35 0.3 0.2
3 Silica, µg/l, max 20 20 20
4 Sodium, µg/l, max 10 5 5
5 Ammonia, mg/l, max 0.5 0.5 0.5
6 Iron, µg/l, max 10 10 10
7 Copper, µg/l, max 58.8 5 5
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CHEMICAL CONTROL LIMITS OF SUPERHEATED STEAM CYCLE OF 500 MW & ABOVE
SN Parameter 500 MW
1 pH at 25oC 9.0 – 9.2
2 Cation Conductivity, µS/cm, at 25oC, max 0.2
3 Silica, µg/l, max 10
4 Sodium, µg/l, max 5
5 Ammonia, mg/l, max 1.0
6 Iron, µg/l, max 10
7 Copper, µg/l, max 3
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CHEMICAL CONTROL LIMITS OF CONDENSATE OF 60,100 & 200 MW
SN Parameter 60 MW 100MW 200 MW
1 pH at 25oC 8.8 – 9.0 8.8 – 9.0 8.8 – 9.0
2 Cation Conductivity, µS/cm, at 25oC, max
0.35 0.3 0.3
3 Silica, µg/l, max 20 20 20
4 Dissolved O2, µg/l, max 50 40 40
5 Ammonia, mg/l, max 0.5 0.5 0.5
6 Total Iron, µg/l, max 10 10 10
7 Total Copper, µg/l, max 5 5 5
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CHEMICAL CONTROL LIMITS OF CONDENSATE OF 500 MW & ABOVE
SN Parameter 500 MW
1 pH at 25oC 9.0 – 9.2
2 Cation Conductivity, µS/cm, at 25oC, max 0.2
3 Silica, µg/l, max 10
4 Dissolved O2, µg/l, max 40
5 Ammonia, mg/l, max 1.0
6 Total Iron, µg/l, max 10
7 Total Copper, µg/l, max 3
8 Sodium, µg/l, max 5
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CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR POWER PLANT UNITS TREATED CONDENSATE
CPU In/Out)
S.N. PARAMETER 2x500MW 3x500MW 3x500MW
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Type of CPU provided
pH at 25oC, max
Ammonia, µg/l, max
Cation Conductivity, µS/cm, at 25oC, max
Silica, µg/l
Sodium, µg/l
Chloride, µg/l
Iron, µg/l
Copper, µg/l
TDS, µg/l
Crud, µg/l
Deep MB
(Ammonex)
IN/OUT
--
--
--/0.1
20/5
10/1
10/1
50/5
5/2
100/25
50/10
Deep MB
(Consep)
IN/OUT
9.2/--
500/--
--/0.1
20/5
10/2
10/2
50/5
5/2
100/25
50.5/
Deep MB
(Seprex)
IN/OUT
9.2/--
500/--
--/0.1
20/5
10/2
10/2
50/5
5/2
100/25
50/5
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CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR COAL/GAS BASED UNITS (100 & 200 MW) PRIMARY STATOR
WATER
SN Parameter 60 MW 100MW 200 MW
1 pH at 25oC
Stator is cooled by H2
Stator is cooled by
H2
6.8 – 7.0
2 Sp. Conductivity, µS/cm, at 250C, max
1.0
3 Dissolved O2, mg/l, max 1.0 – 4.5
4 Copper, µg/l, max -
5 Iron, µg/l, max -
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COAL BASED UNITS (500 MW AND ABOVE) PRIMARY STATOR WATER
SN Parameter 500 MW
1 pH at 25oC 8.5 – 9.0
2 Sp. Conductivity, µS/cm, at 250C, max 2.2
3 Dissolved O2, µg/l, max 10
4 Copper, µg/l, max 20
5 Iron, µg/l, max 20
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CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR GAS/NAPHTHA BASED UNITS FEED WATER
SN Parameter 88MW(GT)+ 149MW (ST)
111.19MW(GT) 109.3MW(ST)
106MW (GT)116.1MW (ST)
144.3MW(GT)225MW (ST)
1 pH at 25oC 9.2 – 9.7 8.5 – 9.5 9.0 – 9.5 8.5 -9.5
2 Cation Conductivity, µS/cm
0.2 0.2 0.2 0.2
3 Dissolved O2, µg/l, max 7 7 10 7
4 Silica, µg/l, max 20 20 20 20
5 Residual N2H4, µg/l, max
- 10 - 10
6 Total Fe, µg/l, max 20 20 20 30
7 Total Cu, µg/l, max 3 3 5 20
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CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR GAS/NAPHTHA BASED UNITS BOILER WATER (HP
DRUM)
SN Parameter 88MW(GT)+ 149MW (ST)
111.19MW(GT) 109.3MW(ST)
106MW (GT)116.1MW (ST)
131 MW(GT)225MW (ST)
1 pH at 25oC 9.8 – 10.2 9.2 – 10.3 9.5 – 10.5 9.0 – 9.8
2 Sp. Conductivity, µS/cm, at 25oC, max
50 100 150 150
3 Silica, mg/l, max 4.0 2.0 2.0 2.0
4 Phosphate, mg/l, max 6 3 – 10 1 – 10 2 - 6
5 TDS, mg/l, max 100 100 100 100
6 Chloride, mg/l, max 10 10 10 10
7 Total Iron, mg/l, max 0.5 0.5 0.5 0.5
8 Total Copper, mg/l, max 0.1 0.1 0.1 0.1
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GAS/NAPHTHA BASED UNITS BOILER WATER (LP DRUM)
SN Parameter 88MW(GT)+ 149MW (ST)
111.19MW(GT) 109.3MW(ST)
106MW (GT)116.1MW (ST)
131 MW(GT)225MW (ST)
1 pH at 25oC 9.8 – 10.2 9.2 – 10.3 9.5 – 10.5 9.0 – 10.5
2 Sp. Conductivity, µS/cm, at 25oC, max
50 100 150 150
3 Silica, mg/l, max 4.0 2.0 5.0 2.0
4 Phosphate, mg/l, max 6 3 – 10 10 – 20 15
5 TDS, mg/l, max 100 100 100 100
6 Chloride, mg/l, max 10 10 10 10
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CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR GAS/NAPHTHA BASED UNITS MAIN STEAM
SN Parameter 3x88MW(GT)+ 1x149 MW (ST)
4x111.19MW(GT) +2x109.3MW(ST)
4x106 MW (GT)+2x116.1MW (ST)
3x144.3 MW(GT)+1x225 MW (ST)
1 pH at 25oC 9.2 – 9.7 8.5 – 9.5 8.8 – 9.2 8.8 – 9.2
2 Cation Conductivity, µS/cm, at 25oC, max
0.2 0.2 0.2 0.2
3 Silica, µg/l, max 20 20 20 20
4 Sodium, µg/l 10 - 10 10
5 Ammonia, mg/l, max - - - -
6 Iron, µg/l, max 20 - - 20
7 Copper, µg/l, max 3 - - 20
8 Chloride, µg/l, max - - - 3
GAS/NAPHTHA BASED UNITS CONDENSATE
SN Parameter 3x88MW(GT)+ 1x149 MW (ST)
4x111.19MW(GT) +2x109.3MW(ST)
4x106 MW (GT)+2x116.1MW (ST)
3x144.3 MW(GT)+1x225 MW (ST)
1 pH at 25oC 9.2 – 9.7 8.5 – 9.2 8.8 – 9.2 8.5 – 9.5
2 Cation Conductivity, µS/cm, at 25oC, max
0.2 0.2 0.2 0.2
3 Silica, µg/l, max 20 20 20 20
4 Dissolved O2, µg/l, max 100 20 20 25
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SWAS
Online Instruments in SWAS
● Silica Analyzer
● Phosphate Analyzer
● pH meter
● Conductivity meter
● ACC Conductivity meter
● Hydrazine Analyzer
● Ammonia Analyzer
● Dissolved Oxygen Analyzer
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SWAS
OFF Line Instruments in SWAS
● pH meter
● Conductivity meter
● Turbidity meter
● Double
● Double bean spectrophoto meter to analyze:
● Silica
● Ammonia
● Hydrazine
● Phosphate
● Iron
● Copper