Abrégé

The invention relates to a filter device comprising at least one filter chamber (7) arranged between a chamber side (4) and a membrane side (6) of two parallel filter plates (1) and divided by means of two filter cloths (4), the membrane sides (6) of the two filter plates (1) each comprising a membrane (3), an outlet (7), and a deviation element (12) applied to the outlet (7) and penetrating the membrane (3). When the filter device is closed, a suspension containing a solid substance can be introduced between the filter cloths (4) in such a way that a filtrate penetrates the filter cloths (4) on the chamber side (4) and on the membrane side (6), while the solid substance is deposited in a filter cake on the filter cloths (4). The filtrate flows first essentially parallel to the filter cloth (4) towards the outlet (7), is deviated by means of the deviation element (12) in an outflow direction (8) perpendicular to the filter cloth (4), and flows through the outlet (7). When the filter device is open, the filter plates (1) are at a distance from each other such that the filter cloths (4) can be removed with the filter cake from the filter chamber (7). In order to avoid loss of tightness of the filter device, a sealing edge (16) of the deviating element (12) is flush with the membrane in a sealing manner.

Classes IPC  ?

• B01D 25/21 - Presses à plaque et cadre

Abrégé

The invention relates to a method for filtering a suspension, said suspension being first introduced into a filter chamber, in a direction which is essentially parallel to at least one filter cloth (12) on a filter cake side of same, the filter chamber being arranged essentially in a lenticular manner between two parallel filter plates (1) when a filter device is closed, whereas when the filter device is opened, the filter plates (1) are at such a distance that the at least one filter cloth (12) can be removed from the filter chamber, penetrating through a filtrate side of same, a solid load of the suspension being deposited as a filter cake on the filter cake side, and then flowing out of the filter chamber on the filtrate side. The invention also relates to such a filter device. In order to be able to homogeneously create or wash the filter cake over the filter cloth (12), the introduced suspension and/or a washing liquid for washing the filter cake on the filter cake side induces an annular flow about a central axis of the filter chamber, said axis being perpendicular to the at least one filter cloth (12), or the filter device comprises a plurality of introduction elements (8) arranged essentially in a separating plane of the filter plates (1) in such a way that they are rotationally symmetrical about the central point (15), The suspension and/or the washing liquid can be introduced by means of said elements, in an inflow direction (13) comprising a radial component oriented towards a central point (15) of the filter chamber and a tangential component perpendicular to the radial component.

Classes IPC  ?

• B01D 25/30 - Dispositifs d'alimentation

Abrégé

The invention relates to a filter device comprising at least one filter chamber which arranged between a filter plate and a counter-plate when the filter device is closed and into which a suspension can be guided, on a cake side of a filter cloth, by means of at least one filling shoe (12) anchored in the filter plate and tightly clamping the filter cloth with the filter plate, and the suspension can pass through the filter cloth on the filtrate side thereof. A solid load of the suspension can be deposited on the filter cloth as a filter cake, and when the filter device is open, the filter plate and the counter-plate are at a distance from each other, and the filter cake can be removed from the at least one filter chamber. In order to simplify the removal of the filter cloth, when the filter device is opened, the filling shoe (12) automatically lifts up from the filter plate, releasing the filter cloth, or the at least one filling shoe (12) is anchored in the filter plate in a mobile manner, and when the filter device is opened, the filling shoe is automatically lifted from the filter plate, and the filter cloth is released.

Classes IPC  ?

• B01D 25/21 - Presses à plaque et cadre
• B01D 25/28 - Lixiviation ou lavage des gâteaux de filtration dans le filtre
• B01D 25/30 - Dispositifs d'alimentation

Abrégé

Process for separating a mixture containing salt, into an ice slurry and a salt slurry, comprising the steps of feeding the mixture to a crystallizer having a first output for the ice slurry and a second output for the salt slurry, treating the salt slurry, so that a liquid part is recycled to the crystallizer, the salt remaining, and washing the ice slurry on the belt filter, whereby purified ice is outputted from the belt filter, as well a liquid which can be recycled to the crystallizer.

Classes IPC  ?

• B01D 9/00 - Cristallisation
• B01D 29/09 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants avec des bandes filtrantes, p. ex. déplaçables entre les opérations de filtration
• C02F 1/22 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par congélation