METHOD TO DRY LOOSE MATERIALS IN FLOW MOVING INSIDE ROTARY INCLINED CYLINDER Russian patent published in 2012 - IPC F26B3/04 F26B3/30 F26B3/20 F26B11/04 

FIELD: heating.

SUBSTANCE: invention may be used for drying loose (disperse) materials in construction (for instance, cement drying), in production of construction materials (for instance, sand and dolomite in production of glass), in agriculture (for instance, grain drying), in food industry (for instance, for flour drying) and to dry industrial wastes (for instance, wood chips) and in other similar industries. In the method to dry loose materials in a flow moving inside a rotary inclined cylinder, in which the material together with the cylinder is heated inside the cylinder, at the same time the cylinder is heated from outside at the bottom by directed infrared radiation along its entire length, placing an infrared heater under the cylinder, and the loose material is heated with the heated inner surface of the cylinder in contact by convection of air heated with this surface inside the cylinder and radiation penetrating through the cylinder simultaneously, at the same time the cylinder is equipped with a device to vary an angle of inclination relatively to horizon and height relative to the base, and a flow of loose materials is formed by one or several such or identical cylinders with infrared heaters, placing them one after the other without gaps into a single line with an identical angle of inclination to the horizon, or one after the other in a single axial vertical plane with minimum gaps between them and different angles of inclination to the horizon, besides, cylinders are made from stainless steel comprising at least 18% of chrome, the external surface of the cylinder is coated with a heat-resistant organosilicic paint of black colour, and the ratio of the cylinder wall thickness to its external diameter is set by the ratio of 1 to 500, at the same time lengths of cylinders in the flow is set as two and (or) three metres.

EFFECT: method implementation makes it possible to simultaneously expand functional capabilities of loose materials drying, to considerably reduce energy intensity of drying process and to provide for environmental purity of heating in process of drying.

14 dwg