Boiler Water Chemistry for Large PF Fired Boilers in TPS.
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The document is a presentation by Manohar Tatwawadi discussing the importance of boiler water chemistry and steam and water quality analysis for turbine efficiency. It provides specific recommended parameters and actual testing results for various water samples, including make-up water, condensate water, boiler feed water, and steam samples. Additionally, it outlines methods for preparing standard solutions for various chemical analyses.
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Boiler Water Chemistry for Large PF Fired Boilers in TPS.
- 1. BOILER WATER CHEMISTRY PRESENTATION BY Manohar Tatwawadi (KTPS, KORADI) 06/08/2019 total output power solutions 1
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- 7. SWAS is nothing but insurance for turbine Here is a presentation that will help you taking a more appropriate decision when you look for good steam & water quality analysis Steam and Water Analysis System 06/08/2019 total output power solutions 7
- 8. Typical Sampling points 06/08/2019 total output power solutions 8
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- 26. Sr N Name of the Sample Parameters Recomnd. IS Recomnd. IS 10496/1983 Actual under normal operating conditions 1 DM / Make up Water pH - - 6.0 to 7.0 Condy. 0.50 mhos/cm - 0.5 mhos/cm SiO2 0.02 - Nil 2 Stator Water pH 6.5-7.5 - 6.0 to 6.8 Condy. 5mhos/cm - 1.0 mhos/cm Copper 0. 20ppm - 0.15 ppm 3 Condensate Water pH - 8.5 – 9.0 8.65 to 8.80 Condy. - - 2.50 to 4.0 After C.C.(0.4-0.5) SiO2 - 0.02 0.01 Free NH3 - 0.50 ppm 0.2 - 0.35 ppm TH - Nil Nil Na+ ( Online) - 20ppb 5 ppb SPECIFICATIONS (Recommended and Actual) 06/08/2019 total output power solutions 26
- 27. 4 Boiler Feed Water pH 8.8 to 9.20 8.5 – 9.5 8.8 to 8.95 Condy. 0.3 mhos/cm After C.C. ( OL) 0.3 After C.C. 3 to 5mhos/cm After C.C.( 0.4 – 0.5)SiO2 0.02 ppm - 0.01 ppm Res. N2H4 0.01 to 0.02 ppm up to 0.05 ppm 0.015 – 0.03 ppm Free NH3 0.50 ppm - 0.2 – 0.4 ppm Hardness Nil - Nil Copper 0.005 ppm - Iron 0.01 ppm 0.01 ppm 5 Super Heated & Saturated Steam sample pH - - 8.8 to 9.0 Condy. - - 2.5 to 4.5 s/cm SiO2 – - - 0.02 ppm 6 Boiler Drum water sample pH 9.1 to 9.8 - 9.3 to 9.6 Condy. Max.100 mhos/cm - 15 to 35 SiO2 As per Silica chart 0.55 ppm at press.140 kg/cm2 - 0.30 ppm Res. PO4 5 to 10 ppm 2 – 10 ppm 1 to 4 ppm Cl – - 2 ppm 1 ppm * Sampling flow rate should be not less than 450 ml / min. 0.01 ppm 06/08/2019 total output power solutions 27
- 28. METHODS OF TEST Method of preparation of standard solutions for colorimetric and volumetric analysis IS 2316: 1990 Standard Solutions are prepared as per IS Determination of Copper Zinc dibenzyl dithio carbamate 454 nm IS 10496 Neocuproine method 454 nm Determination of Iron Bathophenanthroline method 533 nm IS 10496 Determination of Ammonia Nesslers reagent method 430 nm Determination of Hydrazine Paradiamethylamino benzaldehyde 460 nm Determination of artho phosphate Ammonium vanadomolybdate method 400 nm Silica Molybdate method with ascorbic acid as reducing agent 640nm IS 10496 Molybdate method with ANSA as reducing agent 640 nm 06/08/2019 total output power solutions 28
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