combined power plant with supercharged fluidized bed combustion and process for operating the same

摘要

A pressurized fluidized bed combustion combined cycle power plant has a gas turbine unit of single spindle type in which a turbine (2) driven by combustion gas from burning of coal in a pressurized fluidized bed combustion boiler (4) drives an electrical generator (3) at constant speed and drives a compressor (1) supplying compressed combustion air to the boiler (4). To permit partial load running, control means are provided to effect, in dependence on an operating load of the boiler, control of at least one of (a) the flow rate of said combustion air into said boiler, and (b) the operating pressure in said combustion chamber of said boiler. The control means may be for example a valve (19) controlling a by-pass flow of the combustion air and/or inlet guide vanes (20) of the compressor (1). IMAGE