ChE226 MECHANICAL OPERATIONS

UNIT-I
Properties and handling of particulate solids: Characterization of solid particles, shape and size, mixed particle size analysis, specific surface of mixtures, average particle size, screen analysis and standard screen series. Properties of particulate masses, different types of conveyers and storage of solids.
Size Reduction: Principles of comminution, size reduction equipment-crushers, grinders, ultra fine grinders and cutting machines. Open circuit and closed circuit operation.

UNIT-II
Size separation: Screening, screening equipment-grizzlying, gyratory, vibrating, revolving screens. Capacity and effectiveness of screens.
Materials Separation: Magnetic separators, Electro- static separators and froth flotation.

UNIT-III
Filtration: Theory of filtration and filtration equipment, Principles of Cake filtration: Pressure drop calculations, constant rate filtration, constant pressure filtration and principles of centrifugal filtration.

UNIT-IV
Motion of particles through fluids: Drag coefficient - free and hindered settling. Sink and float method, classifiers and thickness, cyclones, hydroclones, centrifuges, jigging and tabling.
Agitation and mixing: Purpose of agitation, agitation equipment, power consumption in agitated vessels, mixing equipment.


Text Books

1. Unit Operations of Chemical Engineering, Warren,L., McCabe, Julian C.Smith, Peter Harriot, 7th Edition. - McGraw Hill.
2. Unit Operations, R. S. Kulakarni and Hiremath, Everest Publishers.

1. Chemical Engineering vol. - II, Coulson, J.H., and Richardson, Paragon Press and ELBS
2. Unit Operations, Brown George, CBS
3. Mechanical Operations for Chemical Engineers, C. M. Narayana and B.C.Bhattacharyya, Khanna Publishers
4. Coulson & Richardson's Chemical Engineering, Volume:2, 4th edition, J.F. Richardson, J. H. Harker and J. R. Backhurst, Elsevier.
5. Perry's Chemical Engineers Hand Book, Perry Rober H, 7th edition,McGraw Hill