The invention relates to devices for disinfecting bulk materials, in particular grain and grain products, with the help of ultraviolet radiation. The technical solution can be used in the food, microbiological, pharmaceutical, pharmacological, cosmetic, agricultural, livestock, poultry, and in production of ecologically clean food products.The modular installation for processing bulk grain products with ultraviolet radiation consists of successively arranged modules. The module consists of a rectangular housing, wherein inside the housing at an equal distance from each other, horizontally, with the possibility of adjusting the mutual position, lamps of ultraviolet radiation are installed, equipped with a protective, transparent for ultraviolet radiation, Teflon coating adjacent to the lamp glass and equipped on the top with a protective shield to protect from the product being poured, the module has an lamps ultraviolet intensity sensor aimed at one of the lamps, as well as a device for cleaning the lamps from contamination, the modules are mounted on racks, with the possibility of adjusting the distance between modules, racks are fixed on a frame equipped with a vibrating mechanism.The technical result consists in providing passage of bulk material between ultraviolet lamps and in cleaning it from harmful microorganisms with the possibility of regulating the flow velocity of particles and controlling the intensity of irradiation.The technical result consists in providing a passage of grain material between the ultraviolet lamps and cleaning it from harmful micro-organisms with the possibility of adjusting the particle flow velocity and controlling the intensity of irradiation.