technologies for sustainable development dr. v. k. sethi, research adviser centre for energy...
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TECHNOLOGIES FOR SUSTAINABLE DEVELOPMENT
Dr. V. K. Sethi, Research Adviser
CENTRE FOR ENERGY TECHNOLOGY
UNIVERSITY COLLEGE OF ENGINEERING
OSMANIA UNIVERSITY
• Thermal Power Generation - 65-70% of total Power
• PC Power Plants - 84% of Thermal
• Estimated Coal Reserves - 202 Billion Tonnes
• Ash content in Indian Coals - 40-48%
• 500 MW PC Fired Power Plants(170 bar, 535oC) - 34%
• Super Critical Units(250 bar, 540oC) - 37.5%
• Ultra Super Critical(285 bar, 580oC) - 40%(AUSTENATIC ALLOY STEEL for PRESSURE PARTS)
• IGCC Power Plants - 37-39% 48% with advanced gas turbines
• Refinery bottom IGCC - 2.0% Higher than Coal based
• Advantages of IGCC - Low Emissions Environment friendly
low grade or high Ash Coals can be used
Types•Coal / Lignite based IGCC
•RAW PET-COKE / Refinery Residue IGCC
• Bagasse based Co-generation
Gasification Conversion of Coal / Lignite / BagasseCombustible gas
Primary Thermal Decomposition CO, CO2, H2, H2O,
CH4, H2S, N2, Tar, Oils and Phenols
Secondary C + H2O CO+H2
Fluidised Bed Combustion Technology (FBC)
Flue Gas De-Sulpharisation (FGD) through
Lime-Stone injection
NOx reduction through injection of steam
CO2 reduction through supercritical steam
parameters
• CFBC Higher Fluid Velocity, entraining bed Material
• Bubbling Dense Fluid bed, Low Fluid Velocity, Good Heat Transfer
• PFBC Higher Efficiency
Pressure 6-16 times than AFBC
Second Generation PFBC
integrates combustion with Coal Gasifier to Fuel gas turbine
50% Efficiency
Issues to be discussed
Improvement in IGCC Power Plant• Energy Efficiency• Power Cycle Optimization• Advanced Gasifier System with
PFBC/CFBC• Hot Gas De-Sulpharisation• Advanced Turbine Systems• Hot Gas Particulate Removal
• CO2 emission abatement
• Configuration of IGCC System
Technology Demonstration
100 MW to establish reliability and performance
Fuel Gas Clean-up
Heating Value, Sulphur content, alkali content, Ammonia, Tar and Particulate content
Environmental and Turbine protection
Hot Fuel Gas cleaning
Zinc based regenerative sorbents
Advanced Hot Gas cleaning
Solid Sorbents based on ZnO2
combined with metal carriers (Zinc Titanate)
FB gasification
Feeding Dolomite, Lime-Stone
Sulphur removal 815-1035oC
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