Handling with bulk materials, such as sand, gravel, coal or granules, dust is produced as a function of material-specific properties. From the perspective of process engineering the challenge here is to reduce the emission of the fine dust originating from diffuse sources, in particular PM_2.5. Therefore, water dispersing systems are often used at conveyor belts, crushers or on stockpiles where water spray is generated by two-fluid nozzles. Dust particles are wetted depending on the droplet size distribution and the amount of water used. The binding between droplet and dust particle increases the particle mass and results in a faster sedimentation. However, due to the low inertia of dust particles (PM_2.5), a large amount of water is necessary in order to achieve a sufficient separation efficiency.

For resource and energy efficiency, a new water dispersion system is developed. The goal is to increase the probability of precipitation while reducing water consumption...