Incineration is promising technology of municipal solid waste (MSCW) utilization because it allows to significantly decrease volume of wastes while obtaining thermal and electrical energy.Thermal analysis is one of the most widespread methods of studying MSW conversion. Other method is application of experimental setups which reproduce conditions of real technological equipment. Aim of current work is to determine correlation between oxidation (using thermal analysis) and ignition (using experimental setup) characteristics of six types of non-food MSW. Samples of sawdust, rubber, leather, cardboard, textile and plastic were studied. Thermal analysis was carried out at air in temperature range 50-1000 °C with heating rate 10 °C/min. The ignition tests were performed at temperatures 600, 700 and 800 °C in air medium. The best reactivity parameters were obtained for samples with higher volatile matter content - textile and plastic while the worst were obtained for sample with lowest volatile matter content - rubber. Ignition delay times varied in range 7.5-13.0 s at 600 °C and in range 1.0-1.6 s at 800 °C. Maximal values were obtained for textile and sawdust while minimal - for cardboard and rubber. Dependences of ignition delay times on temperature were approximated using linear, exponential and power law (the latter was more precise). Same dependences were obtained for flaming and char combustion times. Phemenological evaluation revealed poor correlation between oxidation and ignition characteristics of studied fuels. The R2 values varied from 0.40 to 0.65 for ignition times, from 0.36 to 0.85 for flaming combustion times and from 0.69 to 0.81 for char combustion times. Presented results allow to carry out the most general evaluation of ignition properties using only TG-data. It was also found that ignition at high temperatures is better described by kinetic parameters while on low temperature ignition higher influence has technical properties. It was supposedly caused by increased contribution of chemical reactions into heating process with increased temperature.
|Affiliation of speaker||Tomsk polytechnic university|
|Publication||Journal of Cleaner Production|
|Position of speaker||assistant|