Dust collection systems are crucial equipment in industrial production for capturing, separating, and purifying dust-laden gases. Their core objective is to reduce dust emissions, meet environmental standards, and ensure a clean production environment
Technical Performance Requirements
● Dust Collection Efficiency: The core indicator of a dust collection system is the dust removal rate, which must be designed according to industry emission standards (such as GB 16297-1996 "Integrated Emission Standard for Air Pollutants"). For example, the chemical industry typically requires particulate matter emission concentrations to be ≤30mg/m³, while the foundry industry may relax this requirement to ≤50mg/m³. High-efficiency dust collection systems (such as bag filters) can achieve over 99% efficiency, while electrostatic precipitators are suitable for high-concentration, high-volume scenarios.
● Air Volume Handling: The system must match the dust generation of the production equipment, and the air volume design must consider a margin (usually 1.1-1.2 times the theoretical value). For example, a single cupola furnace in a foundry workshop can generate 5000-10000 m³/h of dust, requiring a corresponding dust collection unit.
● Filtration Accuracy: Select filter media based on dust particle size. For example, baghouse dust collectors can intercept particles larger than 0.1μm and are suitable for fine chemicals; cyclone dust collectors are suitable for pretreatment of coarse particles (>10μm).
● Differential Pressure Control: The system operating differential pressure must be stable within a reasonable range (e.g., differential pressure of baghouse dust collectors ≤1500Pa). Excessive differential pressure will lead to increased energy consumption or filter media damage, while insufficient differential pressure may affect dust removal efficiency.
Design Specifications
● Structural Rationality: The dust removal system must include modules such as dust hoods, ductwork, dust collector main unit, fan, and exhaust duct. Dust hood design must follow the principles of "proximity, alignment, and comprehensiveness" (close to dust generation point, aligned with airflow direction, and full coverage). Duct layout should minimize bends and reductions in diameter to reduce resistance.
● Material Compatibility: Select materials based on dust properties. For example, the chemical industry requires corrosion resistance (using stainless steel or fiberglass), while the casting industry requires high-temperature resistance (using carbon steel or ceramic filter tubes). For example, carbon steel bag filters are suitable for environments with temperatures ≤200℃.
● Safety Protection: Explosion-proof valves, explosion relief vents, and spark detection devices (for flammable and explosive dust) must be installed. Maintenance platforms and safety railings must also be provided, complying with GB 50016-2014 "Code for Fire Protection Design of Buildings".