DE1249782B - Screening device for garbage - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN ^ gfw ¹ PATENT OFFICE

EDITORIAL

Int. Cl .:

B03b

B 07 b
German class: 1 a - 40

Number: 1 249 782

File number: D 51757 VI a / 1 a

Filing date: December 12, 1966

Opened on September 14, 1967

In waste disposal plants with shredding devices for waste recycling as soil improvement or fertilizers and the like with connected residual incineration or incineration plants however, it is generally customary to use fines up to a certain order of magnitude to be eliminated. This is done by means of a sieve, preferably a vibrating sieve. Here it is proved to be extremely disadvantageous that the raw waste or the already shredded waste bulky parts particular Kind contains what mainly textiles, leather, rubber and viscoplastic parts mainly from Plastic, namely women's stockings, belong. If such parts together with the rest of the raw waste or put the shredded garbage on a sieve, then they clog the sieve openings or cover them at least so far that only an insufficient part of the fine particles to be separated out falls through the sieve openings. Often so many textile or plastic parts remain on and in the sieve surface depend on the fact that further sieving is only possible again after laborious cleaning of the sieve surface is. Finally, fine parts often remain on the viscoplastic parts etc. and are taken care of by them carried to the end of the sieve, so come to the wrong place.

It is known to have a safety catch in the feed of the raw waste or crushed waste to a sieve to arrange, which is intended to intercept in particular women's stockings contained in the garbage. These however, must be removed from the safety gear at short intervals so that it does not come from be taken back into the waste stream or hinder its flow through their accumulation. It therefore requires additional work if the purpose of the safety gear is to be achieved.

In contrast, the invention makes it possible to eliminate the disadvantages described at the outset in the case of elimination of the fines from the raw waste or shredded waste completely and a perfect To achieve sieving without the constant need for additional work. That will be the result achieves that one or more rakes are arranged in the width of the sieve above the sieve surface, that the material to be fed onto the sieve is first placed on a rake that is strongly inclined towards the sieve surface falls, of which bulky or elastic parts of the garbage, possibly via one or more downstream Rake, to be abandoned at a point on the sieve surface remote from the inlet. The whole Garbage first falls on the first rake, which is formed from individual grate bars, which are placed in a rich sieve device for garbage

Applicant:

Wilhelm Diefenbacher KG,
Karlsruhe, Luisenstr. 85

Named as inventor:

Wilhelm Diefenbacher, Karlsruhe

Direction of the material run arranged above the screen surface, but this is strongly downwardly inclined are. The consequence of this is that all the garbage on this rake slides down, as far as it does not falls through between the rods on the screen surface, which can be supported by the fact that the Rake is made to vibrate in a manner known per se in garbage grates. At the end of the rake then mainly only the bulky or elastic parts already mentioned are on his Rods. However, it can be useful to connect further rakes of about the same type, the but have a lower slope, can be parallel to the screen surface or even upwards, if these rakes are also set in corresponding vibrations. You can go to this too Purpose to be attached to the sieve bottom or to the sieve box and thereby to its vibrations take part.

If necessary, there is another one on the one or more downstream rakes Separation of the fine parts of the garbage from the textiles, viscoplastic parts or the like. Instead. Then you fall at the end of the last rake on the sieve surface or on the material flow moving on the sieve surface. However, this happens at a point that is far from the point where the material is fed onto the sieve is because the rake or rakes in the longitudinal direction of the sieve on a larger part above the Extend sieve surface. The consequence of this is that the fine fraction of the garbage is essentially already on the The sieve surface below the rake or rakes has fallen through its openings, before the textiles, viscoplastic parts etc. reach the subsequent sieve surface on which they are located no longer have a harmful effect and can lead to constipation. They run or slide a lot

709 647/52

more over the rest of the sieve area and then together with the rest of the oversize grain of the Sieve surface delivered at the end of the same.

An embodiment of the inventive concept is shown schematically in the drawing. In it is

Fig. 1 is a side view of the device without the front side frame and

A b b. 2 is a view from above.

In the frame 1 of the vibrating screen, the screen surface 2 is attached, which, for example, from a ge ίο perforated sheet metal, a strong wire mesh or in any other way customary for this purpose can be formed. At the bottom, the resulting screen box is unperforated Floor 3 completed. Above the feed point on the sieve is the rake 4, which consists of a Cross bar 5 and grate bars 6 attached to it in the longitudinal direction is formed. One trained in the same way and rake 9 consisting of the transverse bar 7 and the longitudinal grate bars 8 is on the side walls attached to the sieve and thereby takes part in its vibrations. This rake can be used in Deviation from the illustrated embodiment also attached directly to the screen surface Rods are formed, which are perpendicular to the screen surface at their attachment point, upwards but turned towards it. From the bent part of the bars lying next to one another, a Rakes that have the same position as the rake 9, but also - like this one - parallel to the sieve surface can lie or be directed upwards.

The material to be screened is fed from the conveyor belt 10 and falls over its deflection roller 11 first of all on the bars 6 of the rake 4, which are, for example, a distance of 50 to 80 mm from one another can have. Almost all material particles that are smaller than this distance fall between through the bars. On the other hand, all larger parts slip, especially those contained in the garbage Textiles, viscoplastic parts such as women's stockings, etc. along the inclined bars 6 down, what if necessary, can be supported by the fact that the rake 4 vibrates will. The parts conveyed down in this way then leave the rake 4, whereby they do not by cross bars or the like. Are hindered. This takes you to the rake 9, the bars 8 preferably have the same distance from one another as the bars 6 of the other rake. In the Drawing are, viewed from above, the bars 8 with respect to the bars 6 laterally offset in the In most cases, however, it should be preferable that the individual bars of both rakes are not connected to one another are offset, but lie in the same vertical plane.

The parts transferred by the rake 4, in particular the viscoplastic parts, are placed on the rods 8 Parts, stockings, etc., conveyed further by the vibrations of this rake. It doesn't happen only if the bars of the sieve are inclined slightly downwards in the conveying direction, as shown, but also with horizontally or even slightly upwardly directed rods, which arrangement in in some cases it is even cheaper. At the outer end of the rods 8 then fall the mentioned parts of the Garbage on the sieve surface 2, but this does not lead to the difficulties described can, because almost the entire fine fraction of the waste that is to be separated out on the sieve is already done has fallen through the perforations of the screen surface 2 at this point. The oversized grain is now migrating together with the parts added at the end of the rake 9 to the end of the sieve surface 2, where it is dropped onto the conveyor belt 12 and transported away by this.

The fine material that has fallen through the perforations of the sieve surface 2 first reaches the Floor 3, on which it is conveyed further by the sieve vibrations. At the end of the floor it will dropped onto the conveyor belt 13 and also fed from this to the point provided for this purpose.

Claims (4)

Patent claims: 1. Sieving device for garbage, characterized in that above the sieve surface (2) one or more bar grids (4, 9) are arranged in the width of the screen in such a way that the The material to be fed onto the sieve is initially on a strongly inclined towards the sieve surface (2) Grate (4) falls, from which bulky parts of the garbage, possibly via one or more downstream Grids (9), reach a point on the sieve surface (2) that is remote from the inlet. 2. Sieving device according to claim 1, characterized in that the grate (4) arranged at the point of application of the raw waste or the crushed waste is subjected to vibrations. 3. Sieve device according to claim 1 or 2, characterized in that the one or more downstream Make the grids (9) with the sieve surface (2) at a smaller angle than the grate (4) at the loading point, whereby he or she in the conveying direction downwards, horizontally or upwards are directed. 4. Sieve device according to claim 3, characterized in that the grate bars (8) of the or the downstream grids (9) by a transverse strip (7) on the sieve box (1) or directly attached to the sieve surface (2) and bent in the direction of conveyance if it is directly attached are. Considered publications:
German interpretative document No. 1 129 121. 1 sheet of drawings 709 647/52 9. 67 © Bundesdruckerei Berlin