CHARACTERISTICS OF THE COMBUSTION PROCESS OF WOODWORK WASTE IN THE INSTALLATION OF THERMAL TREATMENT OF MUNICIPAL SOLID WASTE (TPOK)

The article presents tests concerning efficiency of combustion process in a layer by defining quantitative evaluation indicators (localization of reaction (flame) front, ignition rate, mass loss rate, thermal load of the grate). Wood wastes of various grain size were subject of tests. Obtained results for pure wood and paper have also been presented for comparison. Experimental tests were carried out on laboratory scale. The advantage of such tests is large saving of costs which would have to be incurred for tests performed on a real object. Received values of the quantitative indexes may be used by shifting them from the devices in laboratory scale into industrial devices. They help in selecting technical parameters for the systems. Furthermore, they help to avoid errors of input data at the stage of realization of the new or modernized project of the incineration plant. The results show that the tested wood waste were similar regarding their physicochemical properties. The differences can be observed in heating values (14.30-19.91 MJkg(-1)). The rate of ignition for all investigated materials is high (0.021-0.063 kg.(m(-2)s(-1))). Values of SZ and SUM are similar which suggests that the probability of unburned fraction of waste remaining at the end of grate of TPOK installation is low. The ratio SZ/SUM is between 0.79 and 1.49, higher than 1.0, which means that SZ > SUM. It seems to be right as the rate of mass decrement is lower than the rate of ignition.