Boiler system useful in mobile cogeneration apparatus

A boiler comprising:

• a housing having an inlet and an outlet;
• a first drum;
• a second drum;
• a first set of vertical boiler tubes positioned inside said housing;
• a second set of vertical boiler tubes positioned inside said housing;
• and
• conduit means for (a) conducting water from at least one of said drums to said first set of boiler tubes, (b) conducting water between said drums, (c) conducting water from at least one of said drums to said second set of boiler tubes, (d) conducting steam from said first set of boiler tubes to said first drum such that substantially no steam generated in said first set of boiler tubes is delivered by said conduit means to said second drum, and (e) conducting steam from said second set of boiler tubes to said second drum such that substantially no steam generated in said second set of boiler tubes is delivered by said conduit means to said first drum.

A boiler comprising:

• a housing;
• a first container for receiving steam and separating water therefrom;
• a second container for receiving steam and separating water therefrom;
• a plurality of boiler tubes positioned inside said housing;
• and
• conduit means for (a) conducting steam from said boiler tubes to said first container and (b) conducting steam from said boiler tubes to said second container.

A boiler comprising:

• a housing having an inlet and an outlet;
• a superheater means, positioned in said housing, for superheating steam;
• a plurality of first boiler tubes, for producing steam from liquid water, positioned in said housing between said inlet and said superheating means;
• and
• a plurality of second boiler tubes, for producing steam from liquid water, positioned in said housing between said superheating means and said outlet.