Unit Operations II

ΦΔ6Unit Operations II Pumping systems. Calculation of required total pump head. Net positive suction head (NPSH). Piping components (bends, transitions, valves, check valves, fittings). Classification of pumps. Positive displacements pumps, dynamic pumps. Characteristic curves. NPSH-required. Operating point. Similarity relations of centrifugal pumps. Parallel and in series connection of centrifugal pumps. Compression work on a gas. Characteristics of fans, blowers and compressors. Vacuum pumps. Classification of compression equipment and vacuum pumps. Ejectors. Diffusion pumps. Flow of compressed gases in pipes. Mixing processes. Basics in mixing processes. Geometrical characteristics of stirred tanks. Power consumption in stirred tanks. Mixing of miscible low viscosity liquids. Solid-liquid suspensions. Liquid-liquid dispersion. Gas in Liquid dispersion. Fundamentals of particle technology. Characterization of solid particles. Behavior of solid particles. Differential and cumulative particle size distribution. Sampling from heaps and conveyor belts. Sampling from dusty gases. Measurement of particle size distribution. (sieving, gravity sedimentation, centrifugal sedimentation. Coulter counter, light scattering and light absorption methods). Measurement of particle surface area. Mechanical particle separation methods. Solid-solid separation (sieving, elutriation, magnetic and electrostatic separation, flotation, hydrocyclones). Solid-liquid separation (screening, gravitational settling, centrifugal settling, cake filtration, deep bed filtration). Filtration equipment.

11-09-2013