Hot air dryer

convectionrotarycontinuous

GRELBEX direct rotary dryers enable industrial drying of all powdered solids, by bringing them into contact with hot gases. They are designed to guarantee reliable operation, low maintenance, maximum efficiency and industrial availability. These criteria make our dryers a wise choice for drying powdered solids. Rotary dryers consist of a "drum" or "calender" cylinder rotating slowly and evenly on two "bands" supports. This cylinder is driven in rotation by an electric or hydraulic motor, by the action of a pinion on a toothed wheel, or by a chain. The moist product is introduced into the cylinder from one side or the other (depending on whether it is operated in co-current or counter-current). At the entrance to the cylinder is a generator which distributes a uniform flow of hot air at a temperature defined by the process. As the cylinder rotates, the product moves slowly forward, meeting the hot air (which comes in co-current or counter-current) and, as it is circulated, loses its moisture. These dryers are suitable for a wide range of throughputs (from hundreds of kg to dozens of tons per hour), high processing temperatures (from 300 to over 1200°C) and for processing solids of various particle sizes. They are particularly suitable for processing minerals or slag. It's also important to optimize this equipment. There are numerous options for recovering part of the energy from the drying air stream after the process (partial recycling, condensation, cooling, separation, etc.).