Drying unit and dryer section that makes use of such units

Details Drying unit and dryer section that makes use of such units Drying unit and dryer section that makes use of such units

1998-04-22

1999-12-21

Bennett, Henry

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

D21F 500, F26B 1102

Patent

active

060032413

ABSTRACT:
A drying unit in a dryer section of a paper or board machine including a drying wire guided in a loop, a large-diameter impingement-drying and/or through-drying cylinder arranged inside the drying-wire loop and smaller diameter smooth-faced heated contact-drying cylinders arranged on top of the large cylinder and/or in the vicinity thereof and at both sides thereof. The impingement-drying and/or through-drying cylinder is placed in a space below the floor level of the paper machine hall and provided with an openable and closable blow hood so that the removal of broke out of connection with the hood takes place substantially by the force of gravity. The central axes of the contact-drying cylinders placed in the vicinity of the large cylinder are placed in the vicinity of, or above, the floor level of the paper machine hall. A curve sector of the paper web on the outer face of the drying wire over the large cylinder greater than about 180.degree..

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