Equipment and procedure for the separation of solid particles and colloids suspended in liquid with automatic washing system of filtering meshes by means of high pressure water jets generated by a group of mobile spray nozzles, moved vertically by a hydraulic piston controlled by the same washing liquid pressure, operating when the filter is empty of liquid in filtration. The liquid jets are generated by a single nozzles or a group of nozzles, supplied with water through the shaft of the same piston. The nozzles are disposed in such a way to sprinkle the whole surface of the filtering mesh. Feeding the cylinder upper chamber with washing liquid with suitable pressure and flow determines the descending movement of the piston and with it of the nozzle or group of nozzles, mounted at the end of the piston shaft. The velocity of movement of the group of nozzles is regulated, creating in different ways, a resistance to the flow of liquid from the cylinder lower chamber. The upward motion of the plunger to its starting position is obtained by the injection of the liquid, which comes from a pneumatic device or from a dedicated circuit, in the cylinder lower chamber, with the consequent flow of liquid from the superior chamber through the nozzles.
B01D 29/64 - Regenerating the filter material in the filter by scrapers, brushes or the like, acting on the cake side of the filtering element
2.
METHOD AND EQUIPMENT FOR THE WASHING AGAINST CURRENT, FOR THE TRANSPORTATION AND THE PHYSICAL/CHEMICAL TREATMENT OF VEGETABLES AND FRUITS, IN A RESTRICTED ENVIRONMENT, WITH HIGH WATER AND ENERGY EFFICIENCY
The technology of washing and treatment MWU (modular washing unit) is conceived to wash and treat fruits and vegetables in a confined environment, with progressively more and more clean water (counter-current) and with an optimal ratio between the quantities of water used and processed products. The system allows important savings of water, chemicals and energy. The technology of washing and treatment MWU (modular washing unit) is conceived to allow the transport and the treatment of the product in confined environment, with clean water (counter- current) In the MWU the product is submitted to sequence of filling and emptying with appropriated solutions, progressively cleaner, prior to subsequent discretionary treatments. A treatment plant can be equipped with a variable number of MWUs, with additional remote MWUs to meet the desired production capacity. Each MWU consists of a vertical watertight cylinder containing a concetric basket; on the top it is connected to the main product manifold and to the vacuum collector, and at the bottom it is connected to the product drain collector, to the load/unload manifold and to the fluids recycling manifolds. Each MWU is connected to the other MWU of the plant, and to the external tank, through independent manifolds, by appropriate valves, to prevent the mixing of fluids and the cross-contamination.
A23N 12/02 - Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts for washing or blanching
A23N 12/06 - Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts for washing or blanching, combined with subsequent drying
patents