Heat protection hood

Details Heat protection hood Heat protection hood

1992-02-24

1993-10-26

Bennett, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34119, 34122, D06F 5800

Patent

active

052554473

ABSTRACT:
Heat protection hood for heated rolls (1) in particular for rapidly running rolls (1) in paper machines which are partly surrounded by the heat protection hood. In this arrangement an outer screen (7) is arranged partly around the roll (1) and is concentric to it. The outer screen (7) and a likewise concentrically extending partition screen (4) present between it and the roll (1) form an inner gap (5) and an outer gap (6). Respective deflection zones (9) for the air flow drawn along by the roll (1) in the inner gap (5) adjoin each of the ends of the partition screen (4). Deflecting units (10, 11) are provided there so as to deflect the recirculating air flow around the ends of the partition screen (4). The invention is intended to substantially reduce heat losses through radiation and convection and offers the possibility of influencing the axial temperature profile of the roll (1).

REFERENCES:
patent: 2499141 (1950-02-01), Helmus
patent: 2939222 (1960-06-01), Svavar
patent: 3052991 (1962-09-01), Goldner
patent: 3163502 (1964-12-01), Justus et al.
patent: 3206869 (1965-09-01), Justus
patent: 3318017 (1967-05-01), Smith, Jr.
patent: 4462868 (1984-07-01), Oubridge et al.
patent: 4523390 (1985-06-01), McCarthy

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