| 摘要 |
PCT No. PCT/AT87/00054 Sec. 371 Date Jul. 13, 1988 Sec. 102(e) Date Jul. 13, 1988 PCT Filed Sep. 16, 1987 PCT Pub. No. WO88/02046 PCT Pub. Date Mar. 24, 1988.The invention relates to a device for the treatment of a material, in particular a web or material or pulp, which is made to pass between at least two endless, permeable belts, for instance screen belts or the like conveying means, in particular for the displacement washing of a filter cake or for washing fibrous matter, the material being made to pass between the belts along containers serving for the introduction or discharge of a treatment medium, for instance a wash liquid. The main object is to save energy and surface space requirement in the washing of filter cakes or the like, to reduce the production expenditure for such treatment devices and to increase the washing effect. This is achieved according to the invention by providing, in particular for a gravity countercurrent treatment, conveniently a gravity displacement washing, for the treatment containers to be superimposed, in particular approximately vertically, and for the belts with the material lodged therebetween being made to pass ascendingly around the and between the treatment containers in a loopshaped or undulating path, the material being conveyed by the belts first to the lowermost treatment container and the treatment liquid, for instance fresh water, first being fed to the topmost container, conveniently under pressure, and the treatment containers provided on the side facing the upper side of the belts or the material, in particular on the underside of the containers, with openings for feeding or conveying of the treatment liquid to the belts or the material or to other treatment containers positioned underneath.
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