An Experimental Study On The Pyrolysis And Combustion Characteristic Of The Blended Coals

At present, most of power plant are passively or actively in use of the blended coals. Properly firing the blended coals can economize the coal resources, and increase the efficiency of boiler and economy. Thus, it is necessary in deeply studying the integrate characteristic of blended coals. The thesis analyze the pyrolysis, combustion characteristic of several Bituminious coal, anthracite, lignite blends and pyrolysis models.Thermogravimetric Analyzer (TGA2050) is described in work principle, structure, parameter and the factors influencing thermal analysis in the paper.The datong, yangquan, huolinhe coal are mixed as the different ratios. The thesis study on the pyrolysis and combustion characteristic of the blended coals by way of experiments, analysis and summarize the relationship which is the ratios of the blended coals and the volatile separated-out, combustion characteristic. It is concluded that the volatile separated-out characteristic of the blended coals is better than the coal's with the worse volatile in the blends, and the ignition characteristic of the worse volatile coal is improved; the carbon burnout characteristic of the blended coals is better than the worse coal in combustion characteristic in the blended coals.The thesis use the parameters of ignition and combustion stabilized ^ integrate combustion characteristic evaluate the blended coals, and bring forward the reasonable suggestion for economically, efficiently firing blended coals.The single-equation model, usual pyrolysis thermobalance model and the DAEM model are described separately. According to the pyrolysis experimental data of datong coal, the pyrolysis curve of datong coal is computed and compared with the experiment one. The characteristic of every model is analyzed.