Firing equipment that can be operated under turbocharge

Firing equipment that can be operated under turbocharge and that includes a turbocharged firing mechanism, comprising:

• at least two successively arranged air compressors, including a first compressor, and a second compressor that communicates via a conduit means with the turbocharged firing mechanisms;
• a first turbine, which drives said first compressor, is disposed on a common shaft with said first compressor, and forms together with the latter a turbocharger, with the energy needed for driving said first compressor being extracted from the flue gas of the turbocharged firing mechanism via a conduit means to the first turbine driving the first compressor;
• said first turbine has an outlet that communicates with a chimney;
• an air preheater that is disposed between said second compressor and said firing mechanism, with flue gas being supplied to said air preheater via a conduit means;
• a second turbine that drives said second compressor;
• at least during turbocharged operation of said firing equipment, the flue gas is conveyed at high temperature first to said second turbine via a conduit means, and subsequently to said air preheater, which air preheater is disposed between that second compressor and that firing mechanism;
• an electrical apparatus that is operable at least as a generator, and that is operatively associated with said second compressor and said second turbine;
• said firing equipment being intended for a steam generator, which includes a water circulation system;
• which includes, disposed between said air preheater and said first turbine, a heat exchanger that is in said water circulation system;
• which includes a controllable flue gas by-pass line that is connected in parallel with said heat exchanger;
• which includes a cooler disposed between said first compressor and said second compressor;
• and which includes, for non-turbocharged operation, an air charge by-pass line connected in parallel with the subassembly comprising first compressor and cooler, and a flue gas by-pass line connected in parallel with said first turbine.