Brown Coal Bulletin, 2012 (vol. 52), issue 2
Coal as primary energy source in 2010 and 2011
Ing. Marcela Šafářová, Ph.D., Jaroslava Šťovíčková
Zpravodaj Hnědé uhlí 2012, 52(2)
The paper deals with the role of coal as a primary energy source in the years 2010 and 2011. Coal production, coal consumption as well as coal's share of electricity generation are presented at the global, the European, and the national level. A special attention is paid to the role of brown coal in the Czech Republic, which is being extracted in two coal basins located in the north-western Bohemia. In the Czech Republic, brown coal reserves amount to 850 million tons and coal's share of primary energy consumption is more than 40 %. Electricity production from coal exceeds 50 % in the Czech Republic.
Real time calculation of extracted mass volume
Ing. Dana Sládková, Ph.D., Ing. Roman Kapica, Ph.D., Ing. Martin Vrubel, Ph.D., Ing. Markéta Michalusová
Zpravodaj Hnědé uhlí 2012, 52(2)
The main purpose of the bucket wheel positioning system is to improve the control system of opencast mining operations. The real time visualization of bucket wheel spatial position and its movement is provided by the GNSS BANSKY MODEL, a mine modeling and planning software developed by the KVASoftware Company. One of the most important mine surveying jobs is the calculation of extracted mass volume. The system described in the paper (GNSS BANSKY MODEL) enables to execute this task in real time. The paper describes an application which is used for the automation of volume calculation.
Influence of added biomass on quality of brown coal pyrolysis products
Jaroslav Kusý, Ing. Lukáš Anděl, Ing. Marcela Šafářová, Ph.D., RNDr. Ing. Josef Valeš
Zpravodaj Hnědé uhlí 2012, 52(2)
Within the research project No. 105/09/1554 "Conversion of Bohemian brown coal with hydrogen rich matters as a liquid and gaseous hydrocarbon obtaining process" funded by the Czech Science Foundation, different sawdust/brown coal ratios were tested during a set of pyrolysis experiments. The objective of the study was to assess the influence of added biomass on the quality of pyrolysis products - liquid organic phase, pyrolysis water, solid pyrolysis products, and gaseous pyrolysis products. In total, 11 blends with different brown coal/biomass ratio were tested. At first, blends were analysed to determine input parameters and their grain size was adapted...
Evolution and quality of coal seams in the Dětmarovice-Petrovice area of the Upper Silesian Basin
Ing. Pavla Ovčaří, Ph.D., doc. RNDr. František Staněk, Ph.D., Ing. Jan Jelínek, Ph.D., doc. Ing. Josef Honěk, CSc.
Zpravodaj Hnědé uhlí 2012, 52(2)
The ash yield in the anhydrous state Ad (%) and the degree of coalification determined by the content of the volatile matter on dry, ash free basis Vdaf (%) belong to qualitative parameters which determine the usability of coal for carbonization, underground gasification etc. Another very important indicator of the coal usability is the coal seam thickness (m). In the eighties and nineties of the 20th century, an extensive deposit exploration including 17 deep boreholes took place in the Dětmarovice-Petrovice area of the Upper Silesian Basin. The article presents the qualitative parameters for the Poruba, Saddle, and Lower Suchá members, which were...
Measurement of temperature and pore gas composition in brown coal dumps
Ing. Vlastimil Moni, Ph.D., Ing. Pavel Rucký, Ph.D., Ing. Jindřich Šancer, Ph.D.
Zpravodaj Hnědé uhlí 2012, 52(2)
The results from the second phase of the research project funded by the Technology Agency of the Czech Republic are presented in this paper. A prototype penetration sensor for continuous monitoring of temperature and basic composition of pore gas was developed and tested for large-scale coal dumps at coal mines, heating plants, and power plants. The design of the penetration sensor enables to draw the pore gas into a sampling jar (bag) for subsequent laboratory analyses of pore gas composition.