Day Aggregates Dust Suppression Case Study

Materials are delivered primarily by rail, processed if necessary and stored in a sequence of large concrete bays. From here materials are loaded onto lorries by means of loading shovels and distributed by road.

To improve the efficiency and increase the productivity of their station yard site, Day Aggregates took the decision to completely overhaul their plant, opting for a state of the art rail unloading facility and new storage areas. As part of the improvements to the site and in keeping with their ongoing environmental program, Day Aggregates invited Wright Rain to engineer a system which would reduce the impact of dust created by their operation and automatically add water to selected products whilst moving through their unloading facility, to prevent dust becoming airborne.

Task
Wright Rain have been tasked to design and install an efficient system for, dust suppression at the rail unloading points, Water Addition to materials on the delivery belts. Road way dust suppression & stock pile dust suppression

Solution
To prevent dust 'billowing' from the underside of the rail wagons whilst being unloaded, a series of sprinklers were installed to create a fine mist curtain on either side of the unloading bay, confining dust to the pit area. This system can be controlled manually from inside the unloading office by means of a simple switch.

Series of 'Spray Bars' were installed at specified points along the delivery belts from the rail unloading point to the distribution belt. These spray bars can be operated manually from the rail unloading office so that only required materials are wetted or automated via load sensors on belts. Water is delivered through automatic valves on hydraulic pipelines, hidden on the underside of the plant.

A 'Halo' was created from a series of spray bars on each side of the tripper carriage for materials to pass through from the discharge belt to the storage bays. Creating a fine mist, this system prevents dust pluming from materials leaving the belt. Rain gun sprinklers situated on every other bay suppress dust created by wind blowing into the bays. Rainguns soak the top of materials to stop the dust becoming airborne. This system is also used to suppress dust in the additional storage areas around the edges of the yard. These rainguns are designed to overshoot stockpiles and damp roadway areas to reduce dust from vehicle movements.

Conclusion
This system dramatically reduces the impact of dust both for those working on site and those who inhabit local business and residential properties. Using state of the art pumping and control equipment, Day Aggregates have a dust suppression system which complements the advanced processing equipment on site and has also helped them achieve their overall goal of increased efficiency output and environmental compliance from their Station Yard facility