SED-300PWZL-A — SED-300PWZL-A Pressure-Spray Granulation System

Filtered ambient air is heated in a direct-fired natural-gas hot-air furnace (Riello ADB-2ft proportional linear burner, ±2°C accuracy) and enters the top of the Φ3.2 m × 25 m drying tower through orifice + corrugated rectifying plates. A US WANNER triplex diaphragm pressure pump (G10XK, 500-800 L/h, 2-6 MPa, 316L, 3 kW VFD) feeds slurry to two pressure nozzles with tungsten-carbide tips (one duty, one standby, quick-open design) at the top, atomising in concurrent flow with the hot air. Most product falls into a patented internal-cyclone tower bottom that lifts collection efficiency to 90-95%. Fines are captured by a Φ1300 mm long-cone high-efficiency XF-1300 cyclone, then a 135 m² pulse baghouse (500-mesh anti-static needle felt, 304 SS frame), then a SD-2200 wet scrubber with two-stage spray + foam wash and demister; exhaust dust ≤15 mg/m³. A patented pneumatic fines-return system loops cyclone/sieve/baghouse fines back to the tower for second-pass granulation, raising granulation rate to >99%. Siemens PLC/HMI auto-controls inlet temperature via burner, feed rate via tower-bottom temperature, and main-tower pressure via induced-draft fan (45 kW VFD); spray-nozzle HD camera monitoring included.