The fuel, air and flue–gas circuits

The fuel, air and flue–gas circuits

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In this chapter, we shall examine not only the burners or other equipment used to burn the fuel but also the fans and air heaters. Finally, we shall briefly examine how gas turbines are used in combined-cycle plant.

Chapter Contents:

  • 3.1 The furnace
  • 3.1.1 Firing arrangements and burners
  • 3.1.2 Wall-fired boilers and wall burners
  • 3.1.3 Corner-fired boilers and tilting burners
  • 3.1.4 Downshot (also down-fired or W-fired) boilers and their burners
  • 3.1.5 OFA and boosted OFA
  • 3.2 The air and gas circuits
  • 3.2.1 The air heater
  • 3.2.2 Types of fan
  • The stall condition
  • Centrifugal fan surge
  • 3.2.3 Final elements for draught control
  • Types of damper
  • Vane control
  • Variable speed drives
  • Additional instrumentation and drives
  • 3.3 Fuel systems
  • 3.3.1 Coal firing (PF)
  • Vertical spindle ball-and-race mills
  • Vertical roller mills
  • General aspects of vertical spindle mills
  • Horizontal tube mills
  • Air supply systems for mills
  • Oil-firing systems
  • Gas-firing systems
  • 3.3.2 Waste-to-energy plants
  • Overview
  • The bubbling fluidised-bed boiler
  • Circulating fluidised boilers
  • Biomass systems
  • 3.4 Igniter systems
  • 3.5 Burner management systems
  • 3.5.1 Furnace purge and fuel oil leak tests
  • Fuel oil leak test part 1
  • Fuel oil leak test part 2
  • 3.5.2 Starting the oil burners
  • 3.5.3 Starting and stopping a mill
  • BMS operation during mill start
  • BMS operation during mill shutdown
  • 3.5.4 Fuel oil trip
  • 3.5.5 Master fuel trip
  • 3.5.6 Boiler trip
  • 3.5.7 Special considerations for external plant
  • 3.5.8 Special considerations for downshot or W-fired boilers
  • 3.6 Ancillary systems
  • 3.7 Gas turbines in combined-cycle applications
  • 3.8 Summary
  • Reference

Inspec keywords: flue gases; gas turbines; combined cycle power stations

Other keywords: fuel-gas circuits; air heaters; combined-cycle plant; flue-gas circuits; air-gas circuits; gas turbines; fans

Subjects: Combined cycle power stations and plants; Gas-turbine power stations and plants

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