FSI-LPHAcad. year: 2019/2020
The course deals with the main characteristics of fossil fuels and their influence on the design and operation of boilers. The main part of lectures gives information about the preparation of coal for pulverized combustion, pulverizers and their construction, operation and safety. The final part deals with coal burners.
Learning outcomes of the course unit
This course enables students to design milling stations or control operation of more complicated milling circuits. Fuel manipulation in big power plants will be also introduced to students.
Sources and transformation of energy, boilers basics.
Recommended optional programme components
Recommended or required reading
Černý V., Janeba B., Teysler J.,: Parní kotle, Technický průvodce č. 32, SNTL, Praha, 1983
Skála Z.,: Palivové hospodářství, Brno VUT 1987
Atkins P.W.,: Physical Chemistry, Oxford Oxford University Press 1994
Singer J.G.,: Combustion, Fossil Power Systems: A Reference Book on Fuel Burning, Combustion Engineering Power Systems Group; 4th edition (October 1993)
J. Teyssler:Spalování popelnatých hnědých uhlí,SNTL Praha
P.Basu,C.Kefa,L.Jestin: Boilers and Burners,Design and Theory, Springer-verlag,New York
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.
Assesment methods and criteria linked to learning outcomes
Course-unit credit requirements: - Attendance at seminars - handing in notes from seminar calculations – working out a project.
The exam is written and oral.
Language of instruction
The course objective is to make students familiar with fossil fuels and their attributes. The emphasis is put on basic energy resource of the Czech Republic, which is coal. The course also provides with basic theoretical and calculation particulars for the design of milling stations.
Specification of controlled education, way of implementation and compensation for absences
Attendance at seminars is required, compensation of missed lessons to be negotiated with a teacher.
Type of course unit
26 hours, optionally
Teacher / Lecturer
1. Fossil fuels, classification and characteristic attributes of solid fuels.
2. Impact of fuel properties on boiler construction. Liquid fuels, attributes, manipulation, storage.
3. Gaseous fuels, properties, interchangeability of gases, Wobbe index.
4. Combustion quality control, combustion kinetics.
5. Inner and outer coaling, dump sites, transfer of coal, graining.
6. Milling circles, types, usage according to coal type.
7. Drying of coal, drying medium, milling station innertisation, waste vapour re-circulation.
8. Energetic rules for mechanical disconnecting of coal. Grindability, specific grind work, attributes of coal powder.
9. Tube mill, construction, operation and usage.
10. Middle-running mills, construction, operation and usage.
11. Hammer and impact mills, construction, operation and usage.
12. Supplementary devices of mill stations, powder bins, feeders.
13. Collective combustion of coal and biomass.
13 hours, compulsory
Teacher / Lecturer
1. – 2. Fuel composition calculations, stoichiometric calculations with combustion air, power design of air fan.
3. – 4. Stoichiometric flue gas calculations, flue gas concentration calculations, uncooled flame temperature, flue gas dissociation.
5. – 6. The mill circle in a coal-fired boiler. Thermal balance, power calculation, operating conditions.
7. – 8. The mill circle in a lignite-fired boiler. Thermal balance.
9. – 10. The mill circle in a lignite-fired boiler. Power calculation, operating conditions.
11. – 12. Design of crude fuel tank; transport of fuel to the boiler.