| 摘要 |
A heat exchanger (500) for transferring heat between a first gas flow (28), such as flue gases, and a second gas flow (34), such as air or oxygen, includes a housing (514) having a first inlet plenum (520) for receiving the first gas flow (28), a first outlet plenum (522) for discharging the first gas flow (28), a second inlet plenum (526) for receiving the second gas flow (34), and a second outlet plenum (528) for discharging the second gas flow (34). The heat exchanger (500) further includes heat exchange elements (512) disposed within the housing (514). Radial seals (224, 226, 228, 230) are disposed between the housing (514) and the heating elements (512) that define a radial plenum (535, 536). Axial seals (220, 222) are further disposed between the housing (514) and the heating elements (512) to define an axial plenum (530). A third gas flow, such as recirculated flue gas, is provided in the radial plenum (535, 536) and the axial plenum (530) to reduce the leakage between the first gas flow (28) and the second gas flow (34).
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