DE9211176U1 - Cleaning facility - Google Patents

Claims (1)

Wilhelm Haeberle
7486 Scheer Cleaning facilities The invention relates to devices for cleaning free-flowing contaminated solids, in particular ground contaminated, printed plastic waste covered or sealed with paper, aluminum foil or similar. Given that the earth's resources are not infinite and that, unless we change our behavior, there will be an inevitable waste emergency, it is necessary to recycle valuable materials, such as plastic waste. Plastics are a high-quality energy-containing material, so that the recycling of the large amount of plastic waste that is generated is of great importance. In order to be able to reuse plastic waste and return it to production, various regeneration processes have been developed. The basic requirement for all plastic recycling processes with the exception of pyrolysis and thermal disposal is the cleaning of the contaminated waste. Up to now, such waste has been shredded or ground, continuously or discontinuously, often washed with water and dried with the addition of cleaning agents. The water used to wash the waste must then be cleaned at great expense in special or public sewage treatment plants, and drying the washed waste requires a high level of energy. The object of the invention is to create a device for the dry cleaning of such ground waste which removes even particularly stubborn contaminants such as printing inks. According to the invention, the device for dry cleaning of free-flowing contaminated solids of the type mentioned at the beginning, with which this is to be achieved, is characterized in that a helical brush roller that rotates in a stationary sieve tube or a brush belt working against a stationary sieve table is used for cleaning, whereby the bristles of the brush roller or the brush belt are made of natural material, plastic, steel/metal or a mixture of these materials, depending on the application. Further details can be found in the embodiments shown in the drawings for the dry cleaning of free-flowing solids. Here we show schematic representations: Fig.1 Side view with worm brush, sieve tube cut Fig.2 Side view with brush belt and sieve table The device for cleaning free-flowing solids, shown schematically in side view in Fig. 1, consists essentially of a speed-adjustable drive (2) and the screw brush roller (3) suspended from it. The sieve tube (4) shown in section consists of a sieve fabric or perforated sheet that is as rough as possible on the inside and carries the feed hopper (5) on the inlet side. The torque support (6) secures the sieve tube (4) with feed hopper (5), which is freely pushed onto the screw brush roller (3), against twisting and in the axial direction. The solids introduced via the feed hopper (5)
are captured by the worm gears of the brush roller (3)
and transported to the outlet string. In this way, they repeatedly get under the
Bristles. The rough inner surface of the sieve tube (4) prevents any sliding through, the solids practically roll off between the sieve tube (4) and the brush roller (3). Adhering dirt is brushed off on all sides and falls through the sieve tube (4) to the outside into the dirt container (6). The device shown in Fig. 2 works according to the same principle, only instead of the worm roller brush (3) a brush belt (11) working against a fixed sieve table (13) is used. H9202
19.AuJust/ 1992 Wilhelm Haeberle
Scheer Protection claims 1. Device for cleaning free-flowing, dirty solids, in particular ground, dirty, printed, plastic waste covered or sealed with paper, aluminum foil or similar. Consisting of a floating screw-brush cleaner (3) mounted on the preferably speed-adjustable drive (2), a sieve tube (4) pushed over it with a feed hopper (5), the torque support (6) as well as the dirt container (7) and the collecting container (8) for the cleaned solids Fig.1. 2. Cleaning device according to claim 1 characterized, that instead of the worm brush roller (3) a driven brush belt (11) running over at least two rollers (9/10) is used, a fixed brush belt support (12), a sieve table (13), the feed hopper (14) as well as a dirt container (15) and a collecting container (16) for the cleaned solids. Fig.2 3. Cleaning device according to claim 1 and 2, characterized in that the inside of the sieve tube (4) and the side of the sieve table (13) facing the brush belt (11) are as rough as possible. - 2 4. Cleaning device according to claim 1 to 3, characterized in that the snail brushes (3) or the brush band (11) are covered with natural, plastic, steel/metal bristles or a mixture of these materials. H9202 19 Aug/ust 1992