Abstract
The outflow rates of pyrolytic gas are measured in a small-sized coke oven which is heated from only one side. The pyrolytic gas flows out only from the heated side until the heated walltemperature reaches 1000 K, the flow-out direction of the pyrolytic gas then switches over, and most of the pyrolytic gas flows out from the insulated side.
A one-dimensional mathematical model is developed to estimate the pyrolytic gas behavior including the conservation equations of mass and energy and the releasing rates of pyrolytic gases. The flow patterns of pyrolytic gas from the heated and the insulated sides and the temperature distribution in the coke oven are well estimated comparing with the experimental ones. The total coking period is estimated being longer than the case without the gas flow since the pyrolytic gas flow having a lower temperature decreases the heat transfer rate at the heated side. Furthermore, in case of wet coals containing 10% moisture, the coking time is lengthened by about 3% than that of dry coal because the heat is consumed as the latent heat of evaporation on the higher temperature side in the boiling zone.
