MEASUREMENT OF SOLIDS DEPOSITION IN PNEUMATIC CONVEYING

An investigation is reported into the deposition of pulverized coal an d cement within a 53 mm bore mild steel horizontal pipeline under dilu te-phase conveying conditions. Deposition of this kind may have signif icant effects on the response of flow measuring instruments and also o n the conveying efficiency. The degree of deposition was continuously monitored during the conveying process so that time variations were re corded. Data were simultaneously derived from both radiometric and ele ctrodynamic sensors, thus allowing on-line discrimination between movi ng and stationary solids within the pipeline. Measurements were made o ver a range of particle sizes, solids velocities and solids concentrat ions. Deposition is found to have a complex dependence on these variab les.