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

11/27/13 Fußzeilentext 2

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


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


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


CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE OF 60,100 & 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


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


CHEMICAL CONTROL LIMITS OF SUPERHEATED STEAM CYCLE OF 60,100 & 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


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


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


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


CHEMICAL CONTROL LIMITS OF CONDENSATE OF 60,100 & 200 MW


1 pH at 25oC 8.8 – 9.0 8.8 – 9.0 8.8 – 9.0


0.35 0.3 0.3


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


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



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

13

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


CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR COAL/GAS BASED UNITS (100 & 200 MW) PRIMARY STATOR

WATER


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 -


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


4 Copper, µg/l, max 20

5 Iron, µg/l, max 20


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


CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR GAS/NAPHTHA BASED UNITS BOILER WATER (HP

DRUM)


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


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


GAS/NAPHTHA BASED UNITS BOILER WATER (LP DRUM)


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


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


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


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


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

21

SWAS

Online Instruments in SWAS

● Silica Analyzer

● Phosphate Analyzer

● pH meter

● Conductivity meter

● ACC Conductivity meter

● Hydrazine Analyzer

● Ammonia Analyzer

● Dissolved Oxygen Analyzer

22

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

introduction to advances in power plant chemistry · 2013-11-27 · advances in boiler design and...

Documents