BE412571A

BE412571A -

Info

Publication number: BE412571A
Application number: BE412571A
Authority: BE
Priority date: 1934-12-04
Filing date: 1935-12-02
Publication date: 1936-01-31
Also published as: FR782279A

Description

  

  Société dite: Préparation Industrielle des Combustibles.

  
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d'un tamis oscillant qui est traversé par un courant d'air

  
comprimé continu. Bans les appareils existant .actuellement pour

  
l'épuration des produits fins, les rifles et les seuils séparant

  
les différents produits classés, d'après leur densité, en couches

  
superposées, déterminent une perturbation dans la zone de

  
séparation des couches des produits ou éléments qu'ils doivent

  
séparer et qui, dans l'air soufflé, se comportent comme des

  
fluides; en outre, l'évacuation des produits lourds s'effectue,

  
dans ces appareils, le long d'une surface verticale, donc sur

  
une certaine hauteur, et la couche qui est en cours d'évacuation

  
comporte, à sa partie supérieure, des éléments plus légers que

  
ceux qui se trouvent à la partie inférieure de cette couche.

  
Cette disposition présente l'inconvénient suivant, à savoir que, par exemple dans le cas du traitement de charbons, on obtient des schistes contenant un important pourcentage de charbons.

  
Dans le cas de l'appareil faisant l'objet de la

  
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lit filtrant constitué par des grains d'un corps quelconque, mais dont la grosseur et la densité sont supérieures à celles des parties ou éléments les plus volumineux et les plus denses contenus dans le produit traité. L'évacuation des parties ou éléments lourds est effectuée à travers ce lit filtrant qui est,

  
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tale; il résulte de là que ce sont les parties ou éléments

  
les plus lourds du produit traité qui sont évacués, et ce sans déterminer aucune perturbation dans les couches qui sont super-

  
 <EMI ID=4.1> 

  
On connaît déjà des appareils dans lesquels on mélange aux produits à traiter des produits plus lourds, par exemple du feldspath, mais, dans ce cas, la séparation des éléments des produits est effectuée par des rifles, ou par des seuils, les produits les plus lourds étant séparés et évacués au-dessus du feldspath, alors que, dans l'appareil faisant l'objet de la présente invention, l'évacuation des produits ou éléments lourds s'effectue entièrement à travers le lit filtrant.

  
Un mode de réalisation de l'invention est représenté, à titre d'exemple, et suivant une coupe verticale, sur le dessin

  
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sante pour laisser passer les plus gros morceaux des produits lourds séparés. Ait-dessus de la grille 2 est disposé un lit filtrant 3 composé de grains d'un corps quelconque, grains dont la section est supérieure à celle des orifices de la grille perforée 2 et dont la densité est supérieure à celle des éléments les plus lourds du produit traité. Ce dernier,qui est, par exemple, constitué par un mélange de charbons et de



  Company known as: Industrial Preparation of Fuels.

  
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an oscillating sieve which is traversed by a current of air

  
continuous tablet. In the devices currently existing for

  
the purification of fine products, the rifles and the thresholds separating

  
the different products classified, according to their density, in layers

  
superimposed, determine a disturbance in the area of

  
separation of the layers of products or elements that they must

  
separate and which, in the blown air, behave like

  
fluids; in addition, heavy products are evacuated,

  
in these devices, along a vertical surface, therefore on

  
a certain height, and the layer that is being discharged

  
has, at its upper part, elements lighter than

  
those at the bottom of this layer.

  
This arrangement has the following drawback, namely that, for example in the case of the treatment of coals, shales are obtained containing a large percentage of coals.

  
In the case of the device subject to

  
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filter bed consisting of grains of any body, but whose size and density are greater than those of the largest and densest parts or elements contained in the treated product. The evacuation of the heavy parts or elements is carried out through this filter bed which is,

  
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tale; it follows that these are the parts or elements

  
the heaviest of the treated product which are evacuated, and this without determining any disturbance in the layers which are super-

  
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Devices are already known in which heavier products, for example feldspar, are mixed with the products to be treated, but, in this case, the separation of the elements of the products is carried out by rifles, or by thresholds, the most heavy products being separated and discharged above the feldspar, whereas, in the apparatus which is the subject of the present invention, the removal of heavy products or elements takes place entirely through the filter bed.

  
An embodiment of the invention is shown, by way of example, and in vertical section, in the drawing.

  
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health to allow the larger pieces of the separated heavy products to pass. Above the grid 2 is placed a filter bed 3 composed of grains of any body, grains whose section is greater than that of the openings of the perforated grid 2 and whose density is greater than that of the heaviest elements of the treated product. The latter, which is, for example, constituted by a mixture of coals and

Claims

schists, is introduced, through conduit 4, into box 1; <EMI ID = 6.1>

to a hopper 6, into which is fed, by a pipe 7,

the air delivered by a fan} a tap 8, to evacuated.

tion continuous or not, is located at the bottom of the

Box 1 may be subject to movement

vertical or inclined oscillation; in this case, the exhausted air

subjected to a reciprocating displacement determining a suction

and a repression, We can also completely eliminate

sufficient compressed air to determine the classification

by layers of the various elements of the treated product,

In the case of a mixture of coals and shales,

the compressed air stream passing vertically through the device

and, possibly, the vibrations of the body 1 separate the

layer 9 and the coals following layer 10, The coals

are evacuated by gravity above the edges II of the body,

as the shales flow, following the direction of

arrows 12, through the filter bed 3 and the grid 2 for

The device can have several boxes 1 mounted

in series, the products leaving some of these cases being

possibly brought back to one or more other crates

to undergo, if necessary, a new separation *

coals or other products and comprising a sieve, vibrating

or not, crossed by a continuous air current, puleatory or

alternative, characterized by the fact that the sieve itself

<EMI ID = 13.1> heaviest elements of the treated product, this layer being supported by a grid or a few; perforated sheet so that

and, optionally, shakes applied to the table, collect in a first layer on top of a second layer formed by the heaviest elements, are collected over the upper edges of the table, while the elements heavy loads descend gradually through the filter bed and through the grid

the fact that several tables are used one after the other, the products leaving some of them possibly being brought back to one or more tables to undergo a new separation there.

ABSTRACT

Dry separation of mixed granular products, e.g. coals and shales, by means of a filter bed

pieces of greater size and density than those of the heaviest product to be separated from the light product, the separation being effected by the effect of an air current passing through the screen, the filter bed, the layers of processed products and, optionally, under the effect of vibrations imparted to the device, the light product leaving the top of the device while the heavy product descends through the filter bed