Dispensing – With gas agitation
Patent
1991-06-21
1993-01-26
Huson, Gregory L.
Dispensing
With gas agitation
222564, 401136, B65G 6906
Patent
active
051816334
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase application of PCT/EP90/00179 filed Feb. 1, 1990 and based upon German application G 89 01 136.8 filed Feb. 2, 1989 under the International Convention.
FIELD OF THE INVENTION
Our present invention relates to a container for bulk material with discharge chute wherein a distribution cone is centrally arrayed and is surrounded by slide faces.
BACKGROUND OF THE INVENTION
In a known container ("Reisner et al., silos and bunkers for the storage of bulk materials, Trans Tech Publications 171, pages 90 and 91") for bulk material with a discharge chute, four inclined sliding plates are provided which are coordinated with a centrally arranged distributor cone. The inclination of the plates is chosen to be about 10% greater than the slope of the bulk material. The number of plates depends on the size of the container and the particle size of a bulk material. The distance between the plates corresponded to at least three times the maximal particle size of the bulk material. With this arrangement, a uniform settling of the bulk material lying thereabove could be accomplished. It has become evident, however, that in the known container for bulk material with a discharge chute the main problems, which arise in the handling of bulk materials, such as the blockage of the exit orifice due to bridging, the caking on the walls of the container, and the formation of dead zones, and thus a diminution of the effectiveness of the container, cannot be totally avoided.
OBJECTS OF THE INVENTION
It is the object of the invention to provide an improved container for bulk material with a discharge chute so that the formation of bridging above the exit orifice, caking on the container walls and formation of dead zones is reliably avoided and which, thereby overcomes drawbacks of the prior art.
SUMMARY OF THE INVENTION
According to the invention, a container includes a hollow glide body formed with inner walls forming an orifice opening into the bottom of the container, outer walls formed shorter than the inner walls, and a distribution cone formed with respective walls lying in a plane parallel to a plane in which inner and outer walls of the glide body lie. The cone is connected with the glide body. Thus the bulk material can be drawn down without any formation of depressions. The bulk material drops uniformly over the entire cross section of the container. This is particularly true for bulk material from the border areas, since a free slope angle of the bulk material can form below the hollow sliding bodies opening downwards. Such structure enables the sliding of the bulk material from the periphery, so that no compression will arise due to buildup of pressure. Uniformity of flow provided in the entire area of cross section avoids blockages of the exit orifices by bridging, as well as caking on the container walls, and the formation of dead zones.
Uniformity of the flow conditions can be further improved by exposing the hollow spaces of the glide bodies open towards the bottom to gas introduced as a means of fluidization. Due to the effect of fluidization, the internal friction of the bulk material particles is reduced.
The uniformity of flow conditions is achieved with cylindrical containers for bulk material with conical delivery chutes and inserted components as well as with containers for bulk material with rectangular or quadratic cross sections. The impairments usually arising in rectangular or quadratic containers in the areas of the wall angles of the discharge chute walls and leading to formation of dead zones, are not observed in embodiments according to the invention.
The inserted components are fixed in the discharge chute by means of brackets. Other fastening means as, for example, rope suspensions are also possible.
According to a further embodiment, the glide body for containers for bulk materials with cross flow, can be realized without an outer side all on the side of the gas exit, in a manner considering the changed behavior of
REFERENCES:
patent: 4382723 (1983-05-01), Moller
patent: 4793529 (1988-12-01), Krauss et al.
patent: 4854722 (1989-08-01), Jackson
patent: 4941779 (1990-07-01), Dewitz et al.
patent: 4970830 (1990-11-01), Schlick
patent: 5129766 (1992-07-01), Dirkse et al.
Weber Raymond
Wunnenberg Wolfgang
Bergwerksverband GmbH
Dubno Herbert
Huson Gregory L.
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