Introduction to Advances in Power Plant Chemistry

Transcription

1 Introduction to Advances in Power Plant Chemistry

2 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

3 Advances in Boiler design and its implication for water chemistry Double Drum Boiler early 60s MW 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 11/27/13 Fußzeilentext 3

4 Chemical Control Limits in Different Design Boiler For Steam-water Cycle

5 CHEMICAL CONTROL LIMITS FOR FEED WATER OF 60,100 & 200 MW SN Parameter 60 MW 100MW 200 MW 1 ph at 25oC Cation Conductivity, µs/cm Dissolved O2, µg/l, max Silica, µg/l, max Residual N2H4, µg/l Total Fe, µg/l, max Total Cu, µg/l, max 5 5 5

6 CHEMICAL CONTROL LIMITS FOR FEED WATER OF 500 MW AND ABOVE SN Parameter 500 MW 1 ph at 25oC Cation Conductivity, µs/cm Dissolved O2, µg/l, max 5 4 Silica, µg/l, max 10 5 Residual N2H4, µg/l Total Fe, µg/l, max 10 7 Total Cu, µg/l, max 3 11/27/13 Fußzeilentext 6

7 CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE OF 60,100 & 200 MW SN Parameter 60 MW 100MW 200 MW 1 ph at 25oC Sp. Conductivity, µs/cm, at 25oC, max Silica, mg/l, max Phosphate, mg/l Chloride, mg/l, max /27/13 Fußzeilentext 7

8 CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE OF 500 MW & ABOVE SN Parameter 500 MW 1 ph at 25oC Sp. Conductivity, µs/cm, at 25oC, max 20 3 Silica, mg/l, max Phosphate, mg/l Chloride, mg/l, max /27/13 Fußzeilentext 8

9 CHEMICAL CONTROL LIMITS OF SUPERHEATED STEAM CYCLE OF 60,100 & 200 MW SN Parameter 60 MW 100MW 200 MW 1 ph at 25oC Cation Conductivity, µs/cm, at 25oC, max Silica, µg/l, max Sodium, µg/l, max Ammonia, mg/l, max Iron, µg/l, max Copper, µg/l, max /27/13 Fußzeilentext 9

10 CHEMICAL CONTROL LIMITS OF SUPERHEATED STEAM CYCLE OF 500 MW & ABOVE SN Parameter 500 MW 1 ph at 25oC Cation Conductivity, µs/cm, at 25oC, max Silica, µg/l, max 10 4 Sodium, µg/l, max 5 5 Ammonia, mg/l, max Iron, µg/l, max 10 7 Copper, µg/l, max 3 11/27/13 Fußzeilentext 10

11 CHEMICAL CONTROL LIMITS OF CONDENSATE OF 60,100 & 200 MW SN Parameter 60 MW 100MW 200 MW 1 ph at 25oC Cation Conductivity, µs/cm, at 25oC, max Silica, µg/l, max Dissolved O2, µg/l, max Ammonia, mg/l, max Total Iron, µg/l, max Total Copper, µg/l, max /27/13 Fußzeilentext 11

12 CHEMICAL CONTROL LIMITS OF CONDENSATE OF 500 MW & ABOVE SN Parameter 500 MW 1 ph at 25oC Cation Conductivity, µs/cm, at 25oC, max Silica, µg/l, max 10 4 Dissolved O2, µg/l, max 40 5 Ammonia, mg/l, max Total Iron, µg/l, max 10 7 Total Copper, µg/l, max 3 8 Sodium, µg/l, max 5 11/27/13 Fußzeilentext 12

13 CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR POWER PLANT UNITS TREATED CONDENSATE CPU In/Out) S.N. PARAMETER 2x500MW 3x500MW 3x500MW 1. Type of CPU provided Deep MB Deep MB Deep MB (Ammonex) (Consep) (Seprex) IN/OUT IN/OUT IN/OUT 2. ph at 25oC, max /-- 9.2/ 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 -- --/0.1 20/5 10/1 10/1 50/5 5/2 100/25 50/10 500/-- --/0.1 20/5 10/2 10/2 50/5 5/2 100/ / 500/-- --/0.1 20/5 10/2 10/2 50/5 5/2 100/25 50/5 Crud, µg/l 13

14 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 2 Sp. Conductivity, µs/cm, at 250C, max Stator is cooled by H2 Stator is cooled by H Dissolved O2, mg/l, max Copper, µg/l, max - 5 Iron, µg/l, max /27/13 Fußzeilentext 14

15 COAL BASED UNITS (500 MW AND ABOVE) PRIMARY STATOR WATER SN Parameter 500 MW 1 ph at 25oC Sp. Conductivity, µs/cm, at 250C, max Dissolved O2, µg/l, max 10 4 Copper, µg/l, max 20 5 Iron, µg/l, max 20 11/27/13 Fußzeilentext 15

16 CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR GAS/NAPHTHA BASED UNITS FEED WATER SN Parameter 88MW (GT)+ 149MW (ST) M W(GT) 109.3M W(ST) 106MW (GT) 116.1MW (ST) 144.3MW (GT) 225MW (ST) 1 ph at 25oC Cation Conductivity, µs/cm Dissolved O2, µg/l, max Silica, µg/l, max Residual N2H4, µg/l, max Total Fe, µg/l, max Total Cu, µg/l, max /27/13 Fußzeilentext 16

17 CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR GAS/NAPHTHA BASED UNITS BOILER WATER (HP DRUM) SN Parameter 88MW (GT)+ 149MW (ST) M W(GT) 109.3MW (ST) 106MW (GT) 116.1MW (ST) 131 MW(GT) 225MW (ST) 1 ph at 25oC Sp. Conductivity, µs/cm, at 25oC, max Silica, mg/l, max Phosphate, mg/l, max TDS, mg/l, max Chloride, mg/l, max Total Iron, mg/l, max Total Copper, mg/l, max /27/13 Fußzeilentext 17

18 GAS/NAPHTHA BASED UNITS BOILER WATER (LP DRUM) SN Parameter 88MW (GT)+ 149MW (ST) M W(GT) 109.3MW (ST) 106MW (GT) 116.1MW (ST) 131 MW(GT) 225MW (ST) 1 ph at 25oC Sp. Conductivity, µs/cm, at 25oC, max Silica, mg/l, max Phosphate, mg/l, max TDS, mg/l, max Chloride, mg/l, max /27/13 Fußzeilentext 18

19 CHEMICAL CONTROL LIMITS OF STEAM-WATER CYCLE FOR GAS/NAPHTHA BASED UNITS MAIN STEAM SN Parameter 3x88MW (GT)+ 1x149 MW (ST) 4x MW(GT) +2x109.3 MW(ST) 4x106 MW (GT) +2x116.1 MW (ST) 3x144.3 MW(GT) +1x225 MW (ST) 1 ph at 25oC Cation Conductivity, µs/cm, at 25oC, max Silica, µg/l, max Sodium, µg/l Ammonia, mg/l, max Iron, µg/l, max Copper, µg/l, max Chloride, µg/l, max /27/13 Fußzeilentext 19

20 GAS/NAPHTHA BASED UNITS CONDENSATE SN Parameter 3x88MW (GT)+ 1x149 MW (ST) 4x MW(GT) +2x109.3 MW(ST) 4x106 MW (GT) +2x116.1 MW (ST) 3x144.3 MW(GT) +1x225 MW (ST) 1 ph at 25oC Cation Conductivity, µs/cm, at 25oC, max Silica, µg/l, max Dissolved O2, µg/l, max

21 SWAS Online Instruments in SWAS Silica Analyzer Phosphate Analyzer ph meter Conductivity meter ACC Conductivity meter Hydrazine Analyzer Ammonia Analyzer Dissolved Oxygen Analyzer 21

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 22