FIELD: technological processes.
SUBSTANCE: invention relates to drying technology and can be used for drying in the pneumatic transport mode of various dispersed materials, for example, in the food industry and primarily in the woodworking industry. Device for drying raw materials from a particulate wood material includes a heat generator, a heated channel type drying chamber, a device for feeding particles of the processed material, a device for supplying superheated steam, fans. Drying chamber is made in the form of one or several turns of a horizontal annular channel of round or oval cross section, wherein the annular channel has one or more valves for controlling the movement of the slurry of the treated particulate material along one or more turns of the annular channel, one or more devices in the form of a screw or segment radial helical blades are installed in the center of the section of the annular drying channel to provide a helical movement of the slurry of the processed particulate material along the section of the annular drying channel. Angle of inclination of the surfaces of the helical blades to the longitudinal axis of the drying channel in the longitudinal axial sections is in the range from 175 to 155°. For a second embodiment of the device, the drying chamber is in the form of a horizontal annular tube of circular or oval cross section with one or more elongated segmented annular portion. For the first and second embodiments of the device, along the section of the drying channel, in the upper part, guide vanes or helical-shaped blades are installed at an angle of inclination of the guide vanes or surfaces of helical blades to the vertical plane of the annular drying channel from 175 to 155°.
EFFECT: creation of a universal drying chamber for dispersed predominantly wood material of various sizes, different initial humidity.
4 cl, 20 dwg
