Filer improvements, particularly those filters used in stall systems for live molluscs

• Main Authors: CARLO CARRESI, VINCENZO LOVAGLIO
• Format: Patent
• Language: English; Italian
• Published: 07.06.1993
• Edition: 5
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROMENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS; THERMAL INSULATION IN GENERAL; WEAPONS

A filter, and more particularly a filter used in stall systems for live molluscs that is made of a recipient divided into three sections, the first of which, or the top one, is supplied with water coming directly or indirectly from the tank containing the mussels or generally from a treatment tank. The second is partially full of a filter medium and the third receives the water that has passed through the filter medium and recycles it into the system or starts to empty it, the filter medium, for example, in the case of stalls for mussels, is quartz sand, only in the lower section, at the higher level in the intermediate section, the upper part is occupied, during normal filter function, by the water from the stall tank that is immersed in the upper, or first, section through an intake valve. When the filter medium needs to be washed, the water flow into the first section is stooped and, in the third filter section, the wash fluid is pumped in, for example water, under pressure, which given the incoherency of the filter medium, this last area would become turbulent, the particles that make it up would be held in suspension in the wash fluid in the filter medium space, and the outside, free material, due to its specific weight, would move through the first filter section and be deposited on the third section, the same as the wash fluid together with the purification and / or discharge system.