METHOD FOR MONITORING SPONTANEOUS COMBUSTION OF COAL

摘要

PURPOSE:To prevent previously and surely spontaneous combustion, by finding a high temperature part by measuring the surface temperature of a coal stock pile and detecting the temperature and moisture with a temperature detector and moisture detector inserted into said part. CONSTITUTION:The side face of a coal stock pile 1 is photographed by an infrared TV image pickup device 2 on a steel tower 3 and a photographed signal processed digitally through a processing circuit 7 and a transmitting circuit 8 is modulated by a carrier-frequency f1 to transmit from an antenna 4. This signal is received by an antenna 6 of an observatory 5 and the surface temperature distribution of the pile 1 is displayed on a TV receiver by demodulating through reception circuit and a signal processing circuit. The detected signal of the temperature and moisture modulated by frequencies f2 and f3 from antennas 17 and 26 of a temperature sensor 12 and a humidity sensor 21 inserted into a high temperature part of the pile 1 is received by the antenna 6 of the observatory 5 and is recorded on an automatic recorder and also, it is applied to an alarm circuit. Thus, spontaneous combustion is prevented previously.