Comparative analysis of firing different coal blends for boiler 12 at TPP Maritsa East 2

Totyo Totev, Dinko Kanev

Abstract


Firing Bulgarian lignite coals for generating electric energy is related to a number of problems connected to the high ash and moisture content which determines its low calorific value. Moreover the high content of combustible sulfur leads to considerable expenses for the desulphurization systems. An alternative for improvement of the technical, economical and environmental indicators for the operation of the boilers at TPP "Maritsa East 2" is the combustion of coal blends that include fuels from different coal basins. This paper describes the planning and the conduction of such an industrial experiment. Results from the operation of the boiler when firing only coals from the "Maritsa East" basin have been presented to serve as a basis for comparison with theresults obtained during combustion of coal mixtures.


Keywords


lignite coal characteristics; firing coal blends; feasibility study; assessment of pollutant emissions.

Full Text:

PDF

References


A. Bosoaga, N. Panoiu, L. Mihaescu, R.I. Backreedy, L. Ma, M. Pourkashanian, A. Williams. The combustion of pulverized low grade lignite Fuel 85 (2006) 1591-1598.

Charles T. Ratcliffe, Geza Pap. Chemical reduction of sulphur dioxide to free sulphur with lignite and coal. 2. Kinetics and proposed mechanism Fuel 59(1980) 244-248.

Chen-Lin Chou. Sulfur in coals: A review of geochemistry and origins International Journal of Coal Geology 100 (2012) 1-13.

D Peralta, N.P. Paterson, D.R. Dugwell, R. Kandiyoti. Coal blend performance during pulverized-fuel combustion: estimation of relative reactivities by a bomb-calorimeter test Fuel 80 (2001) 1623-1634.

Hui Chang, Baoqing Li, Wen Li, Haokan Chen. The influence of mineral matters in coal on NO-char reaction in the presence of SO2 Fuel 83 (2004) 679-683.

Inge I. Maes, Stuart C. Mitchell, Jan Yperman, Dirk V. Franco, Stefan P. Marinov, Jules Mullens, Lucien C. Van Poucke. Sulfur functionalities and physical characteristics of the Maritsa Iztok Basin lignite Fuel 75 (1996) 1286-1293.

J Haas, M Tamura, R Weber. Characterisation of coal blends for pulverized fuel combustion Fuel 80 (2001) 1317-1323.

M.J.G. Alonso, A.G. Borrego, D. Alvarez, W. Kalkreuth, R. Menendez. Physicochemical transformations of coal particles during pyrolysis and combustion Fuel 80 (2001) 1857-1870.

Michalis Agraniotis, Panagiotis Grammelis, Charalambos Papapavlou, Emmanuel Kakaras. Experimental investigation on the combustion behavior of pre-dried Greek lignite Fuel Processing Technology 90 (2009) 1071-1079.

M. Dios, J.A. Souto, J.J. Casares. Experimental development of CO2, SO2 and NOx emission factors for mixed lignite and subbituminous coal-fired plant Energy 53 (2013) 40-51.

S. Jayanti, K. Maheswaran, V. Saravanan. Assessment of the effect of high ash content in pulverized coal combustion Applied Mathematical Modeling 31 (2007) 934-953.

Stanislav V. Vassilev, Christina G. Vassileva. Comparative chemical and mineral characterization of some Bulgarian coals Fuel Processing Technology 55 (1998) 55-69.

Ziqu Ouyang, Jianguo Zhu, Qinggang Lu, Yao Yao, Jingzhang Liu. The effect of limestone on SO2 and NOx emissions of pulverized coal combustion preheated by circulating fluidized bed Fuel 120 (2014) 116-121.

Mariana Gerenova, Totyo Totev, Boncho Bonev. Peculiarities of the coal dust preparation systems of the steam boilers in Maritsa East 2 XII Scientific Conference of the Power Machines and Power Engineering faculty, Technical University of Sofia, 1 (2007) 17-28.

EN 12952-15. Water-tube boilers and auxiliary installations Part 15: Acceptance tests.


Refbacks

  • There are currently no refbacks.


 

 
  
 

 

  


About IJSBAR | Privacy PolicyTerms & Conditions | Contact Us | DisclaimerFAQs 

IJSBAR is published by (GSSRR).