DFFI-n Type Separate Chamber Blowback-Type Dust Remover is a new technical product, which is developed based on Japan Onoda technique. This product is widely used in metallurgy cement, mining company, whose effectiveness can reach the advanced international standard of Nineties. This machine adopts PLC auto-controlling system, separating chambers dedusting timingly, without pressing the air. The emission concentration is lower than state regulations 50 mg/m3 standard. This remover can change bags when the machine is running, easily operating, high safety, which is useful equipment in adverse circumstances.