Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Reexamination Certificate
2006-08-15
2006-08-15
Gravini, S. (Department: 3749)
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
C034S443000
Reexamination Certificate
active
07089682
ABSTRACT:
The invention relates to an air impingement system arranged outside the jacket of an air impingement roll in the drying section of a paper machine or the like for heating and drying a web travelling around the said air impingement roll. The air impingement system comprises a mainly closed hood, which has control means for directing air onto the paper web. From the hood, air is directed by blowing with at least one fan to the blower nozzles and back again into the said hood as a circulation air process, and the system incorporates at least one heating device for heating the air. The air impingement system's hood and its said equipment are used in conjunction with an air impingement roll, which is of the size of approximately 1.5–2 m in diameter. The hood of the air impingement roll is at maximum 5 m high, preferably only 1.5–2.5 m high.
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Nurmi Jarkko
Pettersson Henrik
Sundqvist Hans
Cohen & Pontani, Lieberman & Pavane
Gravini S.
Metso Paper Inc.
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