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SENEGAČNIK, A., KUŠTRIN, I., LENART, J., LEBAN, M., SEKAVČNIK, M.
FEASIBILITY STUDY OF COALMINE VENTILATION AIR METHANE UTILIZATION
KOMUNALNA ENERGETIKA / POWER ENGINERING, 11
During coal mining some dangerous and explosive gases are released. Due to safety reasons the mines should be intensively ventilated. Much of the released gas at coal mining is methane. Released gases are vented to surroundings with ventilation air and therefore the methane is not profitable used. One of the potential beneficial utilization of methane in ventilation air is the utilization as a power station air intake. This paper analyzes the possibility of using the ventilation air from the Velenje Coal Mine as an air intake for power plant Šoštanj Unit 5. The analysis shows that this utilization would have a positive effect in environmental and energy aspect.
KUŠTRIN, I., LENART, J., KOKOVNIK, A., GOSTINČAR, P., HOČEVAR, M.
COMBUSTION OPTIMIZATION WITH RESPECT TO COAL-DUST DISTRIBUTION BETWEEN BURNER NOZZLES
KOMUNALNA ENERGETIKA / POWER ENGINERING, 19
Any combustion should be optimized as much as possible to reduce specific fuel consumption and emissions of harmful substances to environment. Optimization of pulverized coal combustion is a complex task. Coal mills are also fans for pneumatic transport of coal particles to burners. Every mill supplies coal dust to two, three or four nozzles of the same burner. Due to large dimensions and complex geometry of mill and coal dust ducts and stochastic milling process it is practically impossible to evenly distribute coal dust between burner nozzles. It is easier to distribute combustion air according to actual coal distribution which is constantly changing. Coal distribution is affected by coal-feeder load, wear of main mill components and coal properties.
Paper deals with the method for continuous measurement of coal distribution in coal dust ducts after the mills. Electrostatic discharge sensors are applied.
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