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A calorimetry system for measurement of the heating value of coal having a combustor 24 and a mixing unit 30 wherein heat from combustion gases is transferred to air. The system has a gravimetric feeder 64 for providing coal at a measured mass feed rate; the coal including any moisture present there

A calorimetry system for measurement of the heating value of coal having a combustor 24 and a mixing unit 30 wherein heat from combustion gases is transferred to air. The system has a gravimetric feeder 64 for providing coal at a measured mass feed rate; the coal including any moisture present therein. The coal is pulverized in an air-driven mill or pulverizer 14 which is fed coal from the feeder and is separated by a cyclone separator 16 into two streams; one carrying coal and air mixed together in a controlled ratio to the combustor. The air which drives the separator, together with fines of the coal and moisture is fed to an afterburner 26 of the combustor so that the thermal dynamics of the entire coal stream is involved in the heating value measurement. Instrumentatoin measures the flow rates of cooling air, primary air which carries the coal streams into the combustor and secondary combustion air as well as the mass flow rates of the coal into the combustor as measured with the gravimetric feeder. A computer, thermocouples and pressure gauges controls the feeding of the coal and fuel gases (propane) during initiation of combustion, and for computing the heating value of the coal.

대표청구항 ▼

A calorimetry system for measuring the heating value of solid fuel, such as coal, which comprises a calorimeter having a combustor which converts the fuel into combustion gases and a mixer which mixes the combustion gases with another gas to provide flue gas, means for the continuous measurement of

A calorimetry system for measuring the heating value of solid fuel, such as coal, which comprises a calorimeter having a combustor which converts the fuel into combustion gases and a mixer which mixes the combustion gases with another gas to provide flue gas, means for the continuous measurement of the feed rates of the fuel and gases which flow into said calorimeter and the temperature of the gases which flow into said calorimeter and the temperature of the flue gas, means for supplying fuel gas of known heating value to said calorimeter, means utilizing said measurement means for calibrating said calorimeter while said fuel gas of known heating value is being supplied, means for supplying said solid fuel to said calorimeter while measuring the mass feed rate thereof, means responsive to said continuous measurement of said mass feed rates of said solid fuel and gases into said calorimeter and the temperature of said gases and said flue gases to analyze the heating value of said solid fuel.