Roll arrangement and method for cooling a roll

Details Roll arrangement and method for cooling a roll Roll arrangement and method for cooling a roll

1998-02-23

2000-08-01

Lazarus, Ira S.

Heat exchange

Movable heating or cooling surface

Rotary drum

165 86, 165 90, 492 46, F28D 1102

Patent

active

060952377

ABSTRACT:
A roll arrangement that includes a roll with a hollow space arrangement and a heating device that acts on the exterior of the roll. A vaporizable fluid and a heat exchanger are positioned in the hollow space arrangement of the roll to cool the roll more rapidly after the heating device has been shut down and, thus, facilitate handling the roll. A method for cooling a roll for use in a machine for producing a fibrous material web. The roll has been heated on an exterior by an exterior heat source by and includes a hollow space that is at least partially filled with a vaporizable fluid. The roll is, moreover, coupled with a heat exchanger. The method includes vaporizing the vaporizable fluid in the hollow space, condensing the vapor on the heat exchanger by a coolant flow through the heat exchanger, and rotating the heat exchanger within the hollow space to fling the condensed liquid within the hollow space.

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