Modernizacja układów napędowych dmuchaw w kopalnianych stacjach odmetanowania jastrzębskiej spółki weglowej S.A. Jako ważny element optymalizacji pracy stacji odmetanowania na przykładzie KWK „Krupiński”

The methane degassing station KWK "Krupiński" was built in the early 80's of the last century. The methane recovery was conducted by means of 6 compressors of produced by the German company Aerzener GMb and driven by Siemens' engines of the 250 kW power without speed control. The adjustment of the degassing parameters was carried out by subsequent incorporating of the compressors and the manual control by sucking, pumping and exhaust valves at the station. That is the reason why the decision of modernization of the station has been made. The crucial point was the replacement of the engines to high-tech, high-effective units with speed control. The task was performed in 2007. In place of the existing compressors 3 blowers equipped with 132 kW drive fitted with the frequency converters. The parameters of the methane degassing process after the modernization (efficiency, maximum underpressure, maximum closed blower pressure) do not differ from the adequate parameters before the modernization. Application of modern drives with smooth rotation regulation allowed to economize the energy used by methane degassing station. The important element was also the improvement of the stability of gas parameters after the station taking into consideration supply of a gas engines of the overall power of 6,9 MWel with this fuel. The idea of the modernization and the results obtained will be presented in the appropriate schemes, diagrams and tables.