Textiles: fluid treating apparatus – Machines – With successive fluids and plural tubs
Patent
1988-07-13
1990-07-03
Coe, Philip R.
Textiles: fluid treating apparatus
Machines
With successive fluids and plural tubs
68 44, 68158, 68181R, D06B 502
Patent
active
049380389
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for the treatment of a material, in particular a web of 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, conveniently after passing a pressure zone, advantageously a wedge zone, along containers serving for the introduction or discharge of a treatment medium, for instance a wash liquid, a bleaching agent or other chemicals, whereupon the material is optically conveyed to a pressing zone and said containers optically being arranged in series one behind the other and advantageously being connected to inlet or outlets for various treatment media, for instance water and/or bleaching chemicals, optionally of various parameters or values of state, for instance various concentrations or various pressures. The known screen belt presses, in particular double screen belt passes, normally have a considerable surface space requirement. Their energy consumption is also relatively high, particularly if vacuum treatment boxes are provided along the screen belts.
The disadvantages indicated above are eliminated 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, e.g. fresh water, first being fed to the topmost container, conveniently under presssure, 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 to the material or to other treatment containers positioned underneath. The embodiment according to the invention has the advantage that by using the force of gravity for the displacement washing or the like, the energy requirement is particularly low and the plant is greatly simplified by the elmination of additional equipment such as pumps and control means; by arranging the treatment containers in a superimposed way, the surface space requirement of the plant is kept particularly low. Added to this is a high degree of coverage of up to more than 98 percent, a low dilution factor of for instance less than a maximum of 1 and, above all, low foaming.
By arranging the treatment containers preferably vertically superimposed, they are conveniently open or provided with openings on the side facing the underside of the belts or the material, in particular on top or in the upper area, for discharging or conveying the treatment liquid. For reducing the surface area requirement, the treatment containers are combined with particular advantage into a container tower, with passages for the belts and the material lodged therebetween provided between superimposed containers. The undersides of the treatment containers or the said passages can be curved convexly or concavely, the adjacent container walls constituting a guide for the belts.
According to a further embodiment of the invention, a particularly effective washing, scrubbing or the like is obtained if optionally driven guide rolls, press rolls, press nips or the like are arranged laterally of the treatment containers or the container tower, the belts with the material being made to pass around them or in them, the belts possibly being connected to the preceding or following treatment container in relation to the moving direction of the belts or the material. Advantageously, the material, in particular a filter cake or the fibrous matter to be washed, is first introduced into the passage betw
REFERENCES:
patent: 1794039 (1931-02-01), Silvano et al.
patent: 4004879 (1977-01-01), Meier-Windhorst et al.
patent: 4151093 (1979-04-01), Krofta
patent: 4246669 (1981-01-01), Davis
Resch Franz
Sbaschnigg Johann
Coe Philip R.
Maschinenfabrik Andritz Actiengesselschaft
LandOfFree
Material processing system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Material processing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Material processing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1882703