F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
F28F 9/02 (2006.01) D21F 5/18 (2006.01) F28B 1/06 (2006.01) F28D 7/00 (2006.01) F28F 9/26 (2006.01) F28F 19/00 (2006.01) F28F 21/08 (2006.01) F28F 27/02 (2006.01)
Patent
CA 2160274
- 22 - A steam heat exchanger for a wood pulp dryer. The heat exchanger has a frame and a plurality of tubes extending between the ends of the heat exchanger in parallel, spaced-apart relationship to each other. A plurality of fins is connected to the tubes. There is an outlet header near the bottom of the heat exchanger, the outlet ends of the tubes being connected to the outlet header. There is a steam inlet header near the top of the heat exchanger. In one embodiment the inlet header has an inner conduit with a plurality of openings spaced-apart therein for discharging steam from the inner conduit. There is an outer conduit extending about the inner conduit. The inlet ends of the tubes are connected to the outer conduit. There is a middle conduit between the inner and outer conduit with openings in the top thereof. In another embodiment of the invention the inlet header and outlet header are vertically non-aligned when the frame is vertical. In a further embodiment of the invention there is a diverter conduit between the inlet header and the outlet header which is insulated. In a still further embodiment of the invention the inlet header has an inside bottom. A plurality of tubes have their tops connected to the inlet header above the bottom while one tube for handling contaminants, preferably insulated, is connected flush with the bottom.
Cameron Norman M.
Sather Stanley H.
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