Kiln Interior Temperature Transducer

An important control variable for cement kiln process control is material temperature in the various processing zones. Temperature measurements in the calcining zone of the cement kiln utilizing thermocouples becomes impractical because of the corrosive action of the hot gases on the thermocouple protective sheath. The results of the development of a kiln interior temperature sensor which can be utilized in those sections of the kiln which are too hostile for thermocouple installation is described as are the air-purging system, pyrometer, port box, and sight-tube components of the sensor. Sensor-output charts are analyzed, and examples of data output from an on-line computer data-reduction program are discussed. Methods are discussed for determining the optimum sensor location along the rotary kiln.