Oxygen Measurement Improves Efficiency And Product Quality In Cement Kilns

Traditionally, the measurement of oxygen (O₂) inside a rotating cement kiln has provided a good indication of combustion efficiency. This oxygen measurement can also provide an inferred indication of calcining rates and NO_x production. Maintaining a consistent oxygen rate can prevent variations in product quality.

The zirconium oxide measurement technology has become the standard for measuring oxygen in combustion processes. Measurement accuracy is maximized at normal flue gas levels, output is stable, and the sensing cell is very robust. However, many application difficulties hamper getting a suitable measurement of oxygen in a rotating kiln.

The flue gas exit from the kiln presents the best opportunity for measuring oxygen, but outside air can leak through the rotating seal and bias the oxygen measurement upward.