In the aluminum melting and industrial furnace sectors, effective flue gas management is essential for environmental compliance and workplace safety. This case study analyzes the WDL-DMC-500 pulse bag-type dust collector system, focusing on its stability and filtration efficiency in high-temperature dust environments.

1. Dual-Stage Architecture and High-Temperature Gas Treatment

To handle the high-temperature flue gas containing coarse particles generated during aluminum melting, the system adopts a specialized dual-stage treatment strategy.

• Primary High-Efficiency Pre-treatment: The first-stage collector is dedicated to capturing coarse particles. This stage reduces the load on the subsequent filter bags and provides critical physical cooling for the gas stream.

• Secondary Precision Filtration: The second stage utilizes a pulse jet baghouse with a total effective filtration area of 400 m². It achieves a filtration efficiency of ≥99.5%, ensuring discharge concentrations remain consistently below 120 mg/Nm³.

• Temperature Stability: After pre-treatment, the inlet gas temperature to the bags is maintained at ≤100°C, protecting the structural integrity of the filter media.

2. Filter Media Selection and Anti-Condensation Technology

The material of the filter bags and the cleaning mechanism are core to the system's long-term operation.

• High-Performance Composite Media: The 500 filter bags (size φ133×2000mm) are made of high-temperature, water-repellent, and oil-proof material. This surface filtration technology reduces dust adhesion and prevents "bag blinding" caused by moisture or oil mist in the flue gas.

• Long-Life Design: The operational filtration velocity is maintained at approximately 1.0 m/min. This low-load design minimizes abrasive wear from dust particles, ensuring a filter lifespan of at least 2 years.

• Efficient Pulse Cleaning: Equipped with 50 sets of pulse solenoid valves using imported durable diaphragms. The injection pressure is maintained at 0.5-0.7 MPa, with a diaphragm life rating exceeding 1 million cycles.

3. Structural Reliability and Industrial Compatibility

Designed for heavy industrial environments, the equipment includes significant performance redundancies.

• Airflow Capacity: With a rated capacity of 30,000 m³/h, the system is compatible with the exhaust requirements of medium to large-scale melting furnaces.

• Durability Standards: The system integrates dust hoppers, discharge valves, and maintenance platforms. The electrical control system is adapted for 440V/60Hz power standards, supporting automated pulse control and differential pressure monitoring.

Technical Specifications Summary

• Purification Standard: Efficiency ≥99.5%, emission concentration <120 mg/Nm³.

• Filtration Configuration: 500 high-temperature water/oil repellent bags, total area 400 m².

• Cleaning System: 50 pulse valves, diaphragm life >1 million cycles, injection pressure 0.5-0.7 MPa.

• Operational Parameters: Rated airflow 30,000 m³/h, inlet gas temperature ≤100°C.