KWS Environmental Loadout System No. 3 – Z-Arrangement for Screw Conveyors
A common application for disposal of sludge and grit/screenings is loading residuals into dumpsters or trucks for haulage to disposal. For many applications, three screw conveyors in a horizontal/vertical/horizontal arrangement is a cost-effective and maintenance-free solution.
A horizontal screw conveyor is located under one or more dewatering devices to convey residuals to an inclined or vertical screw conveyor. For any incline angle above 45-degrees a vertical conveyor is the best choice. The inclined or vertical screw conveyor transfers the residuals to a second horizontal screw conveyor. The second horizontal screw conveyor transfers the residuals to the center of a dumpster or truck. The dumpster or truck can be moved along its length for better distribution of solids. The second horizontal screw conveyor can utilize multiple discharge points to aid in distributing solids.
The KWS Environmental Loadout System No. 3 is a simple and effective method of transferring residuals from one or more dewatering devices to a dumpster or truck. The Z arrangement is very versatile and allows for the use of multiple dewatering devices as well as vertical lifts up to 30-feet. The dumpster or truck loading station can also be located long distances from the dewatering devices, depending upon plant layout. Both shafted and shaftless screw conveyors are ideal for the application.
Industry Solutions
Features
Completely Enclosed – Inclined screw conveyors are completely water and odor tight to prevent leakage during the transfer of residuals. Conveyor covers are securely fastened to prevent access to rotating components.
Robust Design and Construction – Screw conveyor components are designed with a large factor-of-safety for reliable operation. Drive units are designed for worst-case upset conditions to start the conveyor under the assumption the entire trough is packed with material, just in case a plug develops at the discharge.
Z Arrangement of Conveyors – Z arrangement features three conveyors in tandem for small to large plant layout. The number of moving components is minimized. Controls can be provided at a local control panel and designed to interface as necessary for control from a remote control panel or SCADA system.
Benefits
Maintenance Free for Safe Operation – Water and odor tight designs prevent leakage of residuals and odor so maintenance and housekeeping are not required. Conveyor covers are securely bolted to create a fixed enclosure so personnel do not have access to rotating components.
Reliable Operation – Simple, Z arrangement screw conveyor designs ensure exceptionally long life under high load conditions. Downtime is eliminated because screw conveyors are designed for worst case operating conditions.
Simplified Plant Layout – All of the screw conveyors can be supported from the floor or ceiling, simplifying plant layout and creating clearance for plant operations. Ceiling supports are typically used in the dumpster or truck loading area. The use of inclined or vertical screw conveyors eliminates the need for complex belt conveyors or other expensive conveying devices.
