Dr. Erkan Yersel,
Pulverized coal (PC) is also known as powdered coal or coal dust. PC combustion is being used in over 90% of coal-fired plants worldwide. In such firing system, the pulverised fuel is used in the whole volume of the furnace for the combustion of solid fuels. Coal is ground to the size of a fine grain, mixed with air and burned in the flue gas flow. The ash produced is removed as bottom ash and fly ash. The bottom ash produced is removed at the furnace bottom.
There are three main types of thermal power plants, namely sub-critical, super-critical and ultra-supercritical with increasing thermodynamic efficiency. A supercritical steam cycle typically has pressure > 226 bars and temperature > 537°C .Ultra-super critical cycle typically operates at 357 bars/625°C. Pulverized coal provides the thermal energy which produces about 50% of the world's electric supply.
For a simple concept on designing a pulverized coal combustion system, you can see net. For technical details and other information, you can visit the website of CIMFR, Dhanbad, India (http://www.cimfr.nic.in/) - The best institute in India on coal & coal mining research.
Please see the links given below for more literature on coal combustion.
Regards
http://www.teriin.org/projects/green/pdf/India-CCT.pdf
https://books.google.co.in/books?id=8LIxnwUv4tEC&pg=PA160&lpg=PA160&dq=pulverized+coal+combustion+system%2Bcfri&source=bl&ots=X5uyjAbl28&sig=kiEjoBZOJbMa5o080pL_NER9SXg&hl=en&sa=X&ved=0ahUKEwjhm7-gofLVAhULwI8KHVigA94Q6AEIUTAI#v=onepage&q=pulverized%20coal%20combustion%20system%2Bcfri&f=false
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