Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1988-08-01
1990-08-21
Makay, Albert J.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34156, 34 41, F26B 1300
Patent
active
049494783
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for a process plant arranged for the heat treatment of strip-shaped products, which plant contains a number of lamps operating with infra-red radiation and means for the supply of air or some other suitable heat treatment medium to the strip of product in question via a heat treatment ramp capable of being applied to the strip.
In conjunction with drying or some other heat treatment of strip-shaped products, such as strips of paper, by means of lamps which operate with infra-red radiation, high thermal effects per m.sup.2, for example between 50 and 500 kW/m.sup.2, are necessary in order, amongst other things, to minimize the space requirement of the plant. This in turn means that the effective cooling of the lamps and their reflector structure is necessary in order to prevent them from being damaged and to prevent their service life from being reduced, since even small losses produce a very high thermal load.
In conjunction with the installation of heat treatment plants in paper machines, for example, where production takes place continuously, high reliability is required together with the possibility of simple and rapid servicing of the equipment which is being used, in order to avoid excessively long down-times.
The drying of paper and the coating process mean that large quantities of water are evaporated in the IR drier plant, and the evaporated water vapour must be removed effectively in order not to impede the evaporation process.
Furthermore no major forces must be allowed to act on the strip, as this exhibits poor strength, especially in the wet state.
The object of the present invention is thus in the first place to propose an arrangement of the kind indicated above, which effectively resolves the above-mentioned problem.
Said object is achieved by means of an arrangement in accordance with the present invention, which is characterized essentially in that air or some other suitable heat treatment medium is so arranged so as to be supplied to and to flow essentially parallel to said strip of product.
The invention is described below as a preferred illustrative embodiment, in conjunction with which reference is made to the drawings, in which:
FIG. 1 shows a heat treatment ramp in accordance with the invention as a perspective view seen at an angle from above;
FIG. 2 shows the ramp in a cut-away state arranged next to a moving strip of product;
FIG. 3 shows a ramp arrangement on a paper machine;
FIG. 4 shows a cut-away view of a heat treatment module which is part of the ramp arrangement;
FIG. 5 shows the under side of a frame which is part of a module;
FIG. 6 shows the frame from its opposite side;
FIG. 7 shows a basic diagram illustrating the function of the invention; and
FIG. 8 shows a basic diagram illustrating the function of previously disclosed arrangements.
An arrangement 1 in accordance with the present invention which is suitable to be applied to the drying and/or heating or to some other form of heat treatment of strip-shaped products 2 in heat treatment plants 3, which contains a number of lamps 4 operating with infra-red radiation, for example so as to permit the drying/heating of a strip of paper which runs in a direction from a paper strip production machine 5 to a subsequent point of processing of the, for example, dried paper strip 2, may comprise a number of separate heat treatment modules 7 capable of being connected together to form a common ramp 6. Said modules 7, which can be formed from box-shaped frames 8, inside which a desired number of rod-shaped halogen lamps 4 exhibiting filaments with an infra-red effect can be supported with their respective ends 4A, 4B held by lamp holders 9, 10 operating preferably with a clamping effect, for example a spring effect, in a row inside a lamp accommodating space 11 which is formed between a reflector 12 and a protective cover 13, may be so arranged as to be secured to said ramp 6 in the form of rows, for example as shown in FIG. 1. A number of fixing pins 14, grooves or fixing devices havi
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Impact Systems Inc.
Makay Albert J.
Sollecito John
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