The HHV(Higher heating value) of the solid waste measured by an oxygen bomb calorimeter is known to have limited value in the design of actual incinerator. This is mainly due to the difficulty in analyzing the representative large volume of RDF(refuse-derived fuel) samples. Thus in this research, the development of a large scale calorimeter has been performed with which the more realistic effective calorific value can be obtained.
The type of F.B.C.(Fludized bed combustor) is adapted for the complete combustion and thus for the final equilibrium calorific value.
The developed calorimeter is a continuous feed type, and the weight of waste feed is more than 1kg. That is much better with respect to the representative characterization of waste. At steady state that can be achieved with in a few minutes the effective heating values of the waste are measured.
The samples used are wood, MSW(municipal solid waste), RDF which is a combination of wood, rubber and polyethylene in the ratio of inflow rates of 8 : 1 : 1, waste tire, rubber and polyethylene. The water and air are fixed at 18 ㎤/s and 100㎤/s(oxygen : 21㎤/s) respectively. The effluent gas is checked with by portable gas analyzer(IMR 2500P) and the mass of effluent gas is checked with wet gas meter, which are utilized in the thermal balance for the calculation of effluent heating value of the waste.
It is found that the portion of heating value imparted to the effluent water is much more(80% range) than the heating value of effluent gas(20% range). The developed calorimeter is calibrated with a bomb calorimeter using the pure substances(polyethylene, rubber), and the result is satisfactory within 5% error.
