INSTALLATION FOR DRYING, DISINFECTION OF GRAIN AND PRE-SOWING TREATMENT OF SEEDS Russian patent published in 2022 - IPC F26B17/12 F26B3/347 

FIELD: post-harvest and pre-sowing processing.

SUBSTANCE: invention relates to a technique for post-harvest and pre-sowing processing, disinfection of grain and products of its processing, in particular to drying and disinfection, and can be used in agriculture, in elevators, in cereal factories and mills, in the preparation of feed. The installation for drying, disinfecting grain and pre-sowing seed treatment contains a rectangular vertical drying chamber with partially perforated walls, microwave magnetrons with individual power sources located on opposite walls, and the chamber consists of microwave convection zones located one above the other, each microwave the convective zone contains at least 2 magnetrons, the waveguide of each magnetron is placed inside the grain layer perpendicular to the direction of grain movement and is a rectangular waveguide in cross section, truncated on one side, which is a quadrangular wedge immersed in the grain layer, three edges of the wedge are located at right angles to each other, and the fourth edge of the waveguide is at an angle to the wide wall of the waveguide immersed in the grain layer, the angle at which the waveguide is truncated is determined by the immersion depth of the waveguide into the grain layer, while the edge of the wedge-shaped part of the waveguide formed by the cross-section is drowned out by a radio-transparent plug and directed into the grain layer perpendicular to the movement of the grain layer in the installation, the hot air duct is made in the form of a triangular wedge and is located directly on the upper edge of the waveguide, forming a waveguide-air duct assembly, the lateral face of the air duct is made non-perforated and is located vertically and perpendicular to the lower face of the air duct, and the third face of the wedge-shaped part of the air duct is perforated and is located at an angle of 30° with respect to the vertical side face of the air duct, the waveguide-air duct assemblies are arranged in pairs, with lateral non-perforated edges to each other, in the direction from the central vertical axis of the microwave-convective zone to its side walls, and single waveguide-duct assemblies are installed at the side walls of the microwave-convective zone, the waveguide-duct assemblies are located along the height of the microwave convective zone in several rows, vertically in a checkerboard pattern with respect to the waveguide-air duct assemblies coming from the opposite wall of the microwave-convective zone, to ensure uniform propagation of the microwave field, the distance l between the fourth faces of adjacent waveguides in the microwave-convective zones as the grain moves in the installation can be different and is in the range from 5 to 40 cm, increasing from the microwave convection zones installed in the upper part of the vertical drying chamber, to the lower ones, depending on the initial moisture content of the processed grain, in this case, the number of microwave convection zones in the drying chamber is set at least two, taking into account the processing modes and requirements of the processing line for grain processing, both during drying and when disinfecting grain and pre-sowing seed treatment.

EFFECT: invention increases the uniformity of heating grain by the microwave field, improves the quality of grain disinfection over the thickness of the grain layer.

1 cl, 6 dwg