SYSTEM FOR CONTINUOUS HEAT TREATMENT OF SOLID FINE PARTICLES, MAINLY DISPERSE WOOD MATERIALS AND METHODS OF HEAT TREATMENT, IMPLEMENTED USING SAID COMPLEX Russian patent published in 2016 - IPC F26B20/00 F26B17/10 F26B3/10 

FIELD: technological processes.

SUBSTANCE: invention relates to heat treatment in suspended state in the mode of pneumatic transportation of solid fine particles, mainly of wood origin, and can be used for drying and pyrolysis of wood particles. Complex includes device for continuous heat treatment of fine particles of processed material, in the form of chamber, providing pneumatic transportation of mixed flow of gaseous heat carrier and fine particles. Thermal treatment chamber is made in the form of a girdled channel preferably with round cross section equal along the whole length of the channel, and is equipped with a fan, wherein return unit for repeated heat treatment is installed inside the channel and is configured to control volume of flow repeatedly circulating in channel, wherein output unit of mixed flow of heat carrier and fine particles of processed material is equipped with one cyclone and is configured to split off-gases into two flows. Drying method is implemented by means of said system. Heat carrier temperature at the inlet channel of heat treatment is maintained within 400÷70 wt %, wherein material feeding to drying is maintained in an amount ensuring flow temperature at the channel output of no more than 150 °C. Method of pyrolysis is also realized by this complex, wherein heat carrier temperature at the inlet channel of heat treatment is maintained within 500÷600 °C, while oxygen content in coolant, for example of flue gases is kept lower than 8 wt%, wherein material feeding to drying is maintained in an amount ensuring flow temperature at the channel output of no lower than 200 °C and time of material particles being under heat treatment is maintained within 6÷40 seconds.

EFFECT: complex is universal, enables to adjust in continuous operation modes for any type of initial raw material and provides higher quality drying.

8 cl, 2 dwg