The aim of the course is to get acquainted with coarse particle systems, methods of measuring properties, description of particle distribution and technological operations (processes of separation, mixing, comminution and enlargement, fluidization and transport) with solid particles. Within the course, the emphasis is on the application of acquired knowledge and the development of communication skills through interactive work, preparation of seminars and independent project assignments.

Student responsibilities:

Regular attendance and active participation in classes, taking colloquia, preparation and presentation of seminars, project assignment.

Grading and evaluation of student work over the course of instruction and at a final exam:

Class attendance (25%), colloquiums (30%), evaluation of seminar (30%), report presentation (15%)

Upon successful completion of the course, students will be able to (learning outcomes):

1 . Define basic methods for determination of measurable properties to describe a particle system

2 . List the basic components of mechanical operations with solid particles

3 . Evaluate the impact of particle characteristics on the conduct of particle operations

4 . Size the components and process based on the given design parameters

5 . Select the drive unit according to the particle transport characteristics and technical requirements

6 . Present technical system and calculation results

Lectures

1. Introductory notes on the course, field of application, definition of coarse-dispersed systems, expression of the composition of the mixture, the impact of particles on human health

2. Measurable particle characteristics and methods of determination, description of particle distribution, particle separation limits and fractional separation efficiency

3. Particle separation in gravitational field, particle settling rate, hindered particle settling

4. Continuous flow clarifier and batch clarifiers, particle classification and sorting

5. Particle separation in a centrifugal field, cyclones and multi-cyclone assemblies, centrifuges

6. Particle separation by filters, scrubbers, electrostatic precipitators

7. Adsorption processes and materials, pressure drop during fluid flow through a packed layer of particles

8. Particle fluidization, gass bubles description, types of fluidization and particle characterization

9. Mechanical conveying of particles, transport characteristics and applications

10. Pneumatic conveying of particles, characteristics and modes of transport, propulsion devices

11. Slurry conveying of particles, characteristics and modes of transport, propulsion devices

12. Storage of bulk material, mechanical properties of the bulk layer, particles discharge

13. Feeding device, elements for monitoring and regulation of mechanical operations, auxiliary equipment

14. Operations of mixing fluid and particles, crushing and agglomerating particles

15. Numerical methods and computer tools for modeling the process of mechanical operations

Exercises

1. Determination of system porosity, calculation of mass and volume concentrations and proportions.

2. Determination of equivalent diameter of geometrical shapes, calculation of Wadell sphericity factor

3. Determination of hindered settling rate

4. Numerical example of a two-stage sedimentation

5. Calculation of pressure drop and particle cut size for a low-efficiency cyclone

6. Example of determining the active surface of a filter medium

7. Numerical example of air drying in a fixed bed of adsorbent.

8. Determination of running costs for air drying in a fixed bed of silicagel

9. Numerical example of sizing the gas distribution plate for particle fluidization

10. Numerical example of determining the particle flow resistance factor in pneumatic conveying

11. Example of sizing pneumatic particle conveying

12. Numerical example of determining the optimal pipeline diameter for slurry conveying.

13. Sizing and stability calculation of particle storage tanks

14. Student seminar presentations and discussions

15. Student seminar presentations and discussions

Compulsory literature:

1. Mehaničke operacije, Koharić, V., Fakulteta strojarstva i brodogradnje, 1996, p. 0-0

3. Particle technology - lecture notes, Luka Boban, Interno, e-učenje, 2021, p. 0-0

Recommended literature:

2. Particle size measurement, Allen, T, Chapman & Hall, 1991, p. 0-0