Self-cleaning homogeneous mixer-bleeder system

A self-cleaning homogeneous mixer-bleeder system composed of a set of screens and a bleed manifold for the production of must by pellicular maceration incorporated in a wine maceration tank, comprising:

• a bleed system, which performs a gentle homogeneous mixing by means of injecting CO2 through said system, throughout the entire inner volume of the must extractor maceration tank, increasing contact between the solid and liquid elements of the dense must and, therefore, contributing to reducing maceration time and to increasing the quality according to the Total Polyphenol Index, wherein the bleed system comprises:
• a bleed manifold, composed of a pipe outside the tank which joins each set of perforated side bleed screens by means of a screen connection element, and the function of which, to perform the step of bleeding the tank, is to concentrate the entire output of must in a manually or automatically operated bleed valve;
• a CO2 inlet valve whereby CO2 is supplied for the purpose of homogenizing the pellicular maceration, favoring the exchange of compounds between solid and liquid parts, as well as to perform a countercurrent cleaning of the perforated bleed elements;
• it is therefore possible in one and the same manifold to both extract liquid must and introduce inert CO2 gas into the tank;
• a set of perforated side bleed screens, the geometry of which follows the inner development of the cone and of the cylindrical part of the collar, and which set composed of:
• a perforated left side bleed screen, a perforated right side bleed screen, and a perforated central side bleed screen, the latter screen having a hole in which a perforated bleed tube is fixed by means of a perforated bleed elbow, and which tube is arranged vertically along the inner height of the tank, the described set providing an optimized bleed surface, facilitating the separation of the solid part of the must both at the bottom and along the entire height of the tank;
• furthermore, the perforated bleed tubes are finished at the upper end thereof with respective non-perforated covers;
• an inerting valve which, placed in the upper part of the tank, in the dome element, allows, by means of CO2 injected into the tank, the action of pressurizing the tank for the purpose of removing O2 and, therefore, reducing must oxidation, as well as favoring the step of bleeding when pressurization occurs in the range of 30 to 120 mbar;
• and
• a CO2 system, which is supplied with CO2 by means of a suction pipe in order to be stored, once pressurized and filtered, in an accumulator tank for the purpose of providing CO2 to the must extractor maceration tank through a delivery pipe.