Furnaces fuel feeders

The combustion air and fuel gas flow to the gas burner were measured with flow meters. The flow rates were corrected for temperature and pressure pertaining to experimental conditions. The waste feed rate is calculated from the speed of the feeder motor. Two digital temperature indicators are used for continuously monitoring the temperatures in the furnace and exhaust duct, respectively. The furnace temperature is measured using a type R [Pt—Pt/13% Rhodium] thermocouple of wire size 0.01 inch while the exhaust gas temperature is measured using a type K (Cr—Al) thermocouple having 0.025 inch wires diameter. A microprocessor-based data acquisition and analysis system was used to measure the instantaneous and time-averaged temperature in the combustion chamber and exhaust duct. 

The fuel was weighed from the feeder before and after the test, to determine the total amount of fuel feed to the drop tube furnace. Likewise, the char was carefully collected and weighed from three sources the char deposited on top of the filter paper, the char trapped in the filt jK r, and the char deposited on the probe wall. The sum of these three yields the total char collected, for a given test time. From the weight of the fuel fed (Wf) and the weight of the char collected (Wc), the percent weight loss (V) was calculated using equation 2-2 ... 

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