A Conceptual Approach to Hybridize Pulverized Coal Fired Boiler with Fluidized Bed Boiler for Cleaner Power Generation

Abstract

Power conversion through conventional fossil fired technology produces different pollutants in spite of use of efficient technologies like supercritical, ultra-supercritical, IGCC, FBC etc. Also, technology like, CCS, scrubber, SCR and ESP are used to capture of CO2, SOx, NOx and SPM respectively but at the cost of overall plant efficiency. Co-firing technology is another approach to mitigate pollutants. Despite the use of these methods for arresting the pollutants, complete removal is practically not possible and limited stock of fossil fuel compelled engineers, scientists and technologists to concentrate more on pollution free and sustainable renewable energy sources. But present renewable energy source cannot fulfill our total energy demand due to their low generating capability, high power cost and mostly are intermittent in nature. At this juncture hybridization of fossil fuel technology with renewable sources may be one of the alternatives technologies till complete switchover from conventional power conversion method to renewable power generation, which required further technological advancement and innovation. A new hybrid boiler is conceptualized which capable of burning large verities of fuel ranging from wood to pulverized coal and also its own mill rejects from pulverize section. CO2 generation can be reduced upto 50% per unit of power generation compare to solely fossil firing unit. NOx generation can be reduced by reducing furnace temperature through flue gas mixing, SOx can be captured by feeding CaO in fluidized section and SPM can be arrested by ESP successfully. New hybrid boiler requires techno-economical evaluation to realize in practical use with Palash Wood as main biomass fuel supported by pulverized semi-bituminous coal.

Keywords

• Pollutants, PC, FBC, hybrid boiler

Kaynakça

1. Gibrán S. Alemán-Nava, Victor H. Casiano-Flores, Diana L. Cárdenas-Chávez, Rocío Díaz-Chavez, Nicolae Scarlat ,Jürgen Mahlknecht, Jean-Francois Dallemand, Roberto Parra, Renewable energy research progress in Mexico: A review, Renewable and Sustainable Energy Reviews, 32 –153, 2014.
2. Heinz, Termuehlen, Werner Emsperger, Clean and efficient coal-fired power plant development towards advanced technology, New York ASME Press, ISBN 0- 0194-22003.
3. D.P. Kothari, K.C. Singal, Rakesh Ranjan, Renewable Energy Sources and Emerging Technologies, 2nd Edition (seventh printing), PHI Learning Private Limited- Publisher, ISBN:928-81-203-4470-9, 2013.
4. Prabir Basu, Taylor & Francis, Combustion and Gasification in Fluidized Beds, Taylor & Francis Group, LLCISBN-10: 0849333962, ISBN-13: 978-0849333965,
5. Publication Date: February 17, 2006
6. Power Plant Engineering (3rd Edition)- P.K. Nag, Tata McGRAW HILL Publishing Company Ltd, New Delhi, India, ISNB-13: 978-0-07064815-9, 2008.
7. Lundqvist, R. G., Designing large-scale circulating fluidised bed boilers, VGB PowerTech, 83(10), 41–47, P.S. Weitzel, PE J.M. TanzoshB. Boring, N. Okita, T. Takahashi, N. Ishikawa, Advanced Ultra-Supercritical Power Plant (700 to760C) Design for Indian Coal, Babcock & Wilcox Power Generation Group, Inc. Technical Paper, BR-1884, Presented at: Power-Gen Asia
8. Bangkok, Thailand, October 3-5, 2012

9. Amirabedin, E. and McIlveen-Wright, D, A Feasibility Study of Co-Firing Biomass in the Thermal Power Plant at Soma in order to Reduce Emissions: an Exergy Approach, Int. J. Environ. Res., 7(1):139-154, , ISSN: 6865, Winter 2013. 1004539 EPRI Technical Updates, Review of
10. Alternatives for Co-firing Bioass in Coal-Based Power Plants, J. Wheeldon, EPRI Project Manager, December, S. Soltani, S.M.S. Mahmoudi, M. Yari, T. Morosuk, M.A. Rosen, V. Zare, A comparative exergoeconomic analysis of two biomass and co-firing combined power plants- Energy Conversion and Management, Volume 76, Pages 83–91, December 2013
11. Abhishek Bhattacharya, Amitava Datta, Effects of supplementary biomass firing on the performance of combined cycle power generation: A comparison between NGCC and IGCC plants-, Biomass and Bioenergy, Volume 54, Pages 239–249, July 2013.
12. N. Nikolopoulos, M. Agraniotis, I. Violidakis, E. Karampinis, A. Nikolopoulos, P. Grammelis, Ch. Papapavlou, S. Tzivenis, E. Kakaras, Parametric investigation of a renewable alternative for utilities adopting the co-firing lignite/biomass concept, Fuel, Volume 113, Pages 873–897, November 2013.
13. Zakieh Khorshidi, Minh T. Ho, Dianne E. Wiley, The impact of biomass quality and quantity on the performance and economics of co-firing plants with and without Greenhouse Gas Control, Volume 21, Pages 191–202, February 2014. International Journal of
14. Yuanyi Liu, Xuebin Wang, Yingying Xiong, Houzhang Tan, Yanqing Niu, Study of briquetted biomass co-firing mode in power plants, Applied Thermal Engineering, Volume 63, Issue 1, 5, Pages 266– , February 2014.
15. Bettina Susanne Hoffmann, Alexandre Szklo, Roberto Schaeffer, An evaluation of the techno-economic potential of co-firing coal with woody biomass in thermal power plants in the south of Brazil, Biomass and Bioenergy, Volume 45, Pages 295–302, October 2012.
16. Zakieh Khorshidi, Minh T. Ho, Dianne E. Wiley, Techno-Economic Study of Biomass Co-Firing with and without CO2 Capture in an Australian Black Coal-Fired Power Plant, Energy Procedia, Volume 37, Pages 6035– , 2013.
17. Prabir Basu, James Butler, Mathias A. Leon, Biomass co-firing options on the emission reduction and electricity generation costs in coal-fired power plants, Renewable Energy, Volume 36, Issue 1, Pages 282–288, January 2011.