Efficient Dust Filtration for Cement Kilns and Dryers
The LFEF Dryer Glass Fiber Filter Bag Dust Collector is an advanced dust removal system designed specifically for cement shaft kilns and dryer exhaust gas treatment. Developed by the Hefei Cement Research & Design Institute, this equipment integrates high-efficiency filtration, intelligent control, and high-temperature resistance—making it a reliable solution for dust collection in the building materials industry.
Application Scenarios
Shaft kilns with furnace dimensions such as Φ3.2×10m, Φ2.9/3.0×10m, and Φ2.2×8m.
Rotary dryers in cement plants.
High-temperature exhaust gas environments (60–300℃) with moisture content ranging from 4–12%.
Working Principle
Filtration Dust-laden gas enters the system through the upper intake. Coarse particles fall into the hopper via inertia, while finer dust passes into the filter bags. The inner surface of the bags traps particles, and purified air exits via the exhaust system. → Type: Top-Inlet, Negative Pressure, Pulse-Blow Filtration
Dust Cleaning (Back-Flushing) When dust accumulates and resistance increases, the system uses a microprocessor-controlled back-flush mechanism:
Exhaust valves close.
Reverse air valves open to compress filter bags.
Dust dislodges and drops into the hopper.
Cleaning occurs chamber by chamber without interrupting filtration.
Temperature Control
The entire unit, including ducts and hoppers, is thermally insulated.
Temperature sensors and alarms prevent condensation and bag burning.
Real-time monitoring ensures operational safety.
Construction Features
Filter Media: High-temperature-resistant glass fiber bags with RH formula, providing excellent bending, abrasion, and heat shock resistance.
Body Structure: All-steel casing with thermal expansion allowances.
Insulation: Double-layer LBY-type rock wool insulation, protected by 0.5mm galvanized steel panels.
Maintenance: Room-by-room bag replacement possible without halting operation.
System Components
Component
Description
Intake & Exhaust System
Inlet/outlet ducts, valves, back-flush units
Filter Chambers
Filter bags, steel housing, upper/lower plates
Dust Discharge System
Dust hoppers, rotary valves, screw conveyors
Control System
Microprocessor-based back-blow and temperature control
Advantages Over Traditional Systems
✅ High efficiency filtration with long bag life
✅ Suitable for continuous high-temperature operations
✅ Modular chamber design for non-stop maintenance
✅ Intelligent control reduces labor and improves safety
✅ Energy-efficient operation with minimal downtime
