Tertiary Air Flow Optimization in Pyro Systems

This technical report outlines the implementation of a digital tertiary air (TA) flow measurement system at Ciment Québec to optimize combustion conditions in their pyro system. The report details the challenges faced, including harsh operating conditions with high clinker concentrations and temperatures reaching 1200°C. The necessity for a reliable solution to measure and balance tertiary air flows is emphasized, as it is crucial for maintaining stable kiln operation and ensuring efficient thermal substitution rates. The system provides continuous real-time measurements of volumetric flow and gas velocity, allowing operators to make informed adjustments for optimal air-fuel distribution. The benefits of this implementation include improved operational flexibility, reduced calciner shutdowns, and enhanced energy efficiency, with a noted increase in alternative fuels usage and a significant improvement in specific energy consumption. The report concludes with the successful operation of the installed system in challenging outdoor conditions.