A cement production plant near Volos, Greece, targeting 100% Thermal Substitution Rate (TSR) in their calciner using SRF/RDF fuels required a new dedicated feeding line capable of handling shredded waste. Key challenges included sticky and abrasive dust clogging filter media and bridging discharge valves; high dust-explosion risk demanding full ATEX Zone 21/22 compliance; and a corrosive coastal environment combined with material moisture content up to 30%, requiring advanced surface protection for all equipment.
PM Engineering designed, manufactured, and supplied six jet-pulse bag filters (Type: PM-A 36 DF28RC). Each unit features an anti-clogging design with increased clearance between filter bags, flameless explosion vents, explosion-isolation back flap valves, and certified flame/pressure-proof rotary valves for ATEX Zone 21/22 compliance. Oversized 750×500 mm rotary valves and 70°-inclined hoppers prevent material bridging. A 130 μm multi-layer epoxy and PU coating protocol protects against the coastal, high-moisture environment. Filter media: antistatic polyester with PTFE membrane (oil/water repellent), rated for 4,000 m³/h per unit at an air-to-cloth ratio of 1.62 m³/m²·min.