Study on dust migration law and spray dedusting technology in parallel double belt transportation

Area of Science:

• Environmental Engineering
• Industrial Hygiene
• Computational Fluid Dynamics

Background:

• Coal preparation plants face significant dust pollution challenges from belt transportation systems.
• Understanding air flow and dust particle distribution is crucial for effective control strategies.

Purpose of the Study:

• To investigate the air flow and dust distribution patterns in a parallel double-belt coal transportation system.
• To identify key areas of dust concentration within the coal preparation plant.
• To develop and validate an effective dust reduction strategy.

Main Methods:

• A numerical model simulating air flow and dust distribution was developed.
• The model analyzed particle behavior based on size (e.g., >10 μm and <10 μm).
• Field tests were conducted for verification, and a spray dust reduction plan was implemented and evaluated.

Main Results:

• Simulation revealed specific flow patterns, including gathering and backflow zones.
• Larger dust particles (>10 μm) were concentrated within 0-5m of the belts, while smaller particles (<10 μm) dispersed throughout the workshop.
• Key pollution hotspots identified: guide trough, feed inlet, machine rear, and belt corridor joints.

Conclusions:

• The study successfully modeled dust dispersion in a coal preparation plant.
• A targeted spray dust reduction method proved highly effective, achieving over 90% efficiency.
• The findings provide a basis for mitigating dust pollution in similar industrial settings.