SPE 纤维干燥机.pdf

Flash Tube Dryers Fiber Dryer with and without air circulation 05 | 2011 05 | 2011 Flash Tube Dryers with and without air circulation Drying of wood fibers for the MDF, HDF and WFIB industry  Wet material is injected via a blow-line into the dryer, dried to the desired moisture content and pneumatically conveyed through the dryer duct. High performance cyclones separate the gas stream from the fibers, which are discharged via rotary valves. Exhaust gas is either vented into atmosphere or to a secondary dedusting system. Part of the gas can be re-circulated, if the dryer is heated by hot gases. Capacity  Up to 40 t/h (b.d.) mechanical throughput page 2 05 | 2011 Flash Tube Dryers with and without air circulation Technical characteristics  Adjustment of dwell time dependent on the type of material  High throughput  Low mechanical scale of installation  High standard of operating safety and reliability  Amount of gas re-circulated is infinitely variable  Approx. 25% of thermal energy saving in installations with re-circulation Design characteristics  Material input and dosing additives via blow-line  Adjustable final moisture related to either blow-line or mechanical blending  1-stage or 2-stage drying systems page 3 05 | 2011 Flash Tube Dryers with and without air circulation Energy sources  Indirect heating using heat exchangers with steam or thermal oil for primary energy transmission (no recycle air operation possible)  Direct heating with