Abstract: The petrochemical industry is not only a significant contributor to energy production, but also a key emission source of pollutants such as NO_x and CO₂. Low-oxygen combustion control technology serves as a primary technical approach for achieving energy conservation, emission reduction, and carbon mitigation in heating furnaces. It also constitutes a critical pathway to fulfilling the "Dual Carbon" goals in the petrochemical sector. In order to reduce the cost and improve the performance-price ratio and applicability of the retrofit of low-oxygen combustion control system, industrial tests were conducted to compare the monitoring and control perfor-mance of imported laser CO analyzers versus domestically produced dual-component zirconia O₂+CO_e analyzers. This initiative aimed to maximize the promotion and application of this energy-saving innovation and validate optimal analyzer selection for low-oxygen combustion control systems. The comparison results demonstrate that the dual-component zirconia O₂+CO_e analyzer can completely replace the imported laser CO analyzer in low-oxygen combustion control systems.

Key words: heating furnaceloptimization controlllow-oxygen combustionlthermal efficiencylexcess air coefficientlCO analyzer