F - Mech Eng,Light,Heat,Weapons – 22 – G
Patent
F - Mech Eng,Light,Heat,Weapons
22
G
122/110
F22G 7/00 (2006.01) F22B 29/06 (2006.01) F22B 29/12 (2006.01)
Patent
CA 1176517
ABSTRACT OF THE DISCLOSURE A forced-flow vapour generator heated with fossil fuel is provided with a treatment means for desalination of feed water to less than 0.2 microsiemens/cm and for reducing the content of silicon to below 0.02 ppm, a high- pressure pump, an economiser of the vapour generator, an evaporator formed by tight-welded vertical tubes and serving as combustion chamber walls, a separator, a superheater, all disposed in the said order with respect to the flow of the working medium. The water outlet of the separator communic- ates by a return line with a point between the water treat- ment system and the evaporator. A final evaporator is disposed between the said evaporator and the separator and is disposed between a superheater surface and the economiser in a flue commencing at the combustion chamber. Superheater tubes of a first superheater are tight welded to each other and to the evaporator tubes, they communicate with vapor outlet of the separator. The generator operates on a once- through flow through the evaporator heating surface at a load range of about 50% of full load. The generator improves efficiency of operation by virtue of sliding pressure oper- ation, operates reliably on a prolonged period on partial load, yet permits rapid changes of load.
390896
Gowling Lafleur Henderson Llp
Sulzer Brothers Limited
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