Sawdust Dryer

Sawdust dryer is mainly composed of air heater, feeder, airflow drying pipe, cyclone separator, fan, etc. In the drying process, sawdust is continuously fed into drying tube by screw conveyor to evaporate moisture of wet material in the transportation and dispersion, to get the dried product. Sawdust dryer is widely used in straw briquette fuel, charcoal machinery, wood pellet fuel, sawdust briquettes, agricultural engineering and other industries, such as, corn stalks, soybean straw, cotton stalks, wheat straw, sorghum stalks, sawdust, wood shavings, ginkgo leaves, mulberry leaves and other agricultural cellulose-based materials.

The sawdust has characteristics of high humidity and high adhesion, so, during the drying process, the wet sawdust be fed into the sawdust equipment via the belt conveyor, and the block wet sawdust after quickly thrashing will experience four working areas after entering the negative pressure dryer: 

1. Guiding area, wet sawdust will rapidly evaporate large amounts of water after entering into this area and contacting with high temperature negative pressure hot air, so wet sawdust will be imported to next work area without forming a bond. 

2. Clean-up area, wet sawdust material is in curtain state in this area, so materials are easily to bond when they fall down, the cleaning device in this area will quickly clean out the sawdust bonded cylinder wall and break block sawdust to increase the heat exchange area and improve the drying rate. 

3. Inclined lifting plate area, this area is a low-temperature drying area, in which area the sawdust is in a loose state with low moisture to avoid bonded phenomenon, the finished product will enter into the final discharging area after heat exchanging. 

4. Discharging area, the finished materials scroll to the discharging port and complete the entire drying process in this area.