Boiler control systems
Boiler Control Systems provides definitive information on the design, implementation, maintenance, & operation of large-scale control systems for boilers. It forms a bridge between the disciplines of the electronics engineer & the plant engineer to enable each to understand the issues involved. The book deals first with plant engineering issues, then moves on to consider control systems themselves, & finally a wide range of practical considerations such as commercial aspects, measurements & site considerations. Boiler Control Systems will be of immense use to boiler designers, systems engineers in process control, plant owners, operators, & maintenance staff.
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MODULATING CONTROL SYSTEMS
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achieved actuator adjustment air flow Air register air supply ASEA Brown Boveri automatic control boiler control burning bypass valve carbon carbon monoxide cent coal combined-cycle combined-cycle plant combustion chamber combustion process complex condenser control loops convert Courtesy of Bailey damper deadband desired value differential pressure drum level efficiency electrical electronic Electrostatic precipitator energy excess air FD fan feed pumps feed water feed-forward feed-water control Figure firing rate flue gases flue-gas fluidized-bed boilers function Furnace pressure gas turbine heat HP bypass Igniter input installations interlock load changes measurement millimetres mills minimum modulating nitrogen oxides once-through boilers operation oxygen parameters Platen superheater power plant power-plant pressure control primary air Primary superheater pulverizer Rankine cycle regulator reheat requirements result Secondary superheater sequence setpoint shown in Fig signal sliding-pressure start-up steam flow steam pressure steam temperature control steam turbine superheated throughput tubes turbine throttle valves vapeur