F - Mech Eng,Light,Heat,Weapons – 22 – B
Patent
F - Mech Eng,Light,Heat,Weapons
22
B
122/37
F22B 33/14 (2006.01) F01K 9/00 (2006.01) F01K 23/10 (2006.01) F22B 1/18 (2006.01) F22B 21/24 (2006.01) F22B 33/16 (2006.01) F22B 37/20 (2006.01)
Patent
CA 1240890
-18- -18- ABSTRACT A compact, unfired, staggered tube, once- through steam generator or boiler of simple construction intended primarily for combined cycle power plants in which the thermal energy utilized to generate steam is obtained from the exhaust gases of a gas turbine engine. The boiler provides steam at two different pressure levels, which maximizes recovery of thermal energy; and all wettable components in the steam/water loop are fabri- cated of corrosion resistant materials. This eliminates the need for controlling the pH of the feedwater and the need for chemically controlling its dissolved oxygen con- tent, thereby reducing maintenance and operating costs and making automatic, unattended, remotely controlled operation of the boiler practical as well as eliminating the need for blowing down the boiler and minimizing re- quirements for make-up water. The boiler can be operated dry to remove gas side fouling; and feedwater flow rates can be directly controlled. Orifice-generated pressure drops at the inlets of the boiler tubes which are rela- tively large compared to the pressure drop in the rest of each tube eliminate the flow instability that is charac- teristic of once-through boilers.
451372
Archibald John P.
Campbell Alan H.
Duffy Thomas E.
Aecon Holdings Inc.
Kirby Eades Gale Baker
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