Co-combustion of Pulverized Coal and Biomass-Derived Syngas in an RSP Precalciner

This article mainly uses a combination of experiments and numerical simulations to investigate the cocombustion characteristics of biomass-derived syngas and pulverized coal. A demonstration system has been established in a cement plant by integrating a low-temperature fluidized bed gasifier with an RSP precalciner, with a processing capacity of over 4 t/h for biomass and solid waste. This system provides an energy-saving and emission-reducing solution for the cement industry. The results indicate that the processing capacity of biomass fuel rice husk can reach a maximum rate of 5.6 t/h. The optimal equivalence ratio (ER) is 0.18, which ensures a stable, safe, and appropriate syngas supply to the precalciner. Due to modular design, the introduction of syngas has minimal impact on the furnace, which can enhance the swirling intensity in the MC section and improve the overall heat distribution of the precalciner. At the optimal thermal substitution rate (TSR) of 36%, the raw meal decomposition rate has increased from 89.15% to 94.94%, the total fossil carbon emissions have been reduced by 14.89%, and the outlet NO concentration has decreased to 310.43 ppm.