Silo Technology and Silo Design
Seminar
The seminar deals with the flow properties of bulk solids and the behaviour of bulk solids in silos. In addition, the application of the Jenike method for determining the hopper inclination to achieve mass flow and the outlet size to avoid arching or ratholing will be explained, in each case based on the measured flow properties (yield loci, time yield loci, wall yield loci). Practical examples will be shown. Together we will measure and analyse flow properties using shear testers.
We look at typical problems in silo operation, e.g. funnel flow with stagnant zones, flow obstructions due to arching, segregation, flooding, or buckling of the silo wall, and present measures to avoid these problems. The design of discharge units such as belt conveyors, rotary valves, orbiting screw conveyors, vibrating hoppers, screw feeders or oscillation bar dischargers will be presented regarding the optimum silo design for avoiding funnel flow and flow obstructions.
Finally, we will look at EN 1991-4. This standard is used to calculate the strength of the silo body. We will work out which pitfalls the plant planner can/should avoid achieving an economical silo concept. The Seminar language is German.
