Design, Operation & Reliability of Circulating Fluidized Bed Boilers (CFB)

This intensive three-day training course is primarily intended for experienced O&M staff working in thermal power and process plants but could also be of interest to engineering and management staff seeking to deepen their understanding of CFB technology. The course provides a selective review of CFB fundamentals, operating behaviour, pressure-part reliability and inspection, with emphasis on practical operating significance rather than detailed plant-specific procedures or control-system training.

Day One

• General Overview
  • FB/CFB development, configurations, characteristics, advantages and limitations
• Fluidization and CFB Operating Fundamentals
  • Fluidization regimes, pressure drop, bed inventory, particle size, air distribution and fluidization quality
• Fuel Properties and Combustion
  • • Coal, biomass and waste; fuel variability, air ratio, combustion and co-combustion
• Overall Thermal Design and Operating Significance
  • Heat balance, bed temperature, heat-transfer surfaces and influence on combustion and boiler performance
• CFB Components and Solids Circulation
  • Gas distributors, fuel feed, cyclones, standpipes, return legs, loop seals, valves/seals and external heat exchangers

Day Two

• Bed Inventory and PSD
  • Pressure measurements, particle-size distribution, entrainment, separation and recirculation
• Ash Behaviour, Deposits and Bed Agglomeration
  • Fuel ash behaviour, deposits, fouling and bed/loop-seal agglomeration
• Air Emissions and Operational Trade-offs
  • SO2, NOx and N2O; operating-condition effects, limestone addition and sulphur capture
• CFB Operating Parameters and Load Response
  • Bed temperature, air distribution, pressure drop, solids circulation and fuel quality as operating indicators

Day Three

• Pressure-Part Design Features, Materials and Reliability
  • Main pressure parts, materials, corrosion allowance, creep and fatigue considerations
• Welding and Repair Quality Considerations
  • WPS, PQR, welder qualification, material compatibility, preheat, PWHT and repair quality controls
• Steam Cycle Damage Mechanisms & Component Failure Modes
  • Corrosion, FAC, fatigue, erosion, creep and overheating; operating and chemistry contributors
• Inspection, Degradation Trending and Reliability
  • Inspection planning, NDT overview, field practice, process data and degradation trending
• Operating Performance, Cause-and-Effect and Troubleshooting Discussion
  • Fuel, air distribution, bed conditions, deposits, heat transfer and emissions - operating relationships and corrective considerations
• Question & Answer, Discussion

• Boiler Engineer / Boiler O&M Engineer
• Operations Engineer
• Maintenance Engineer
• Reliability Engineer
• Plant Engineer
• Mechanical Engineer
• O&M Manager
• Maintenance Manager
• Plant Manager
• Engineering Manager