High-performance desulfurizer via simultaneous grinding and hydration using a steam jet mill

The low desulfurization efficiency notably restricts the wide application of dry desulfurization technology, although it is characterized by its cost-effectiveness and simple processes in the desulfurization domain. Consequently, the development of high-performance desulfurizers has become an increasingly pressing task to increase desulfurization efficiency. In this study, we strived to improve the desulfurization performance of calcium-based sorbents by using a steam jet mill to process quicklime and then evaluate its desulfurization capacity. According to the results, under the influence of different rotational speeds of the classifiers, instantaneous crushing and hydration could be simultaneously achieved at steam temperatures ranging from 150 to 260 °C, and the hydration rate of calcium oxide in quicklime could reach 100%. With the rise in temperature and rotational speed, the absorbent exhibited larger specific surface areas, narrower particle sizes, and enhanced activity. The optimized parameters for preparing the absorbent are a relative humidity of 10%, a steam temperature of 260 °C, and a rotational speed of 1350 r·min−1. Under such circumstances, the operating time with 100% desulfurization efficiency could extend to 420 min. The preparation of the high-performance desulfurizer in this study addresses the technical bottleneck of the relatively low efficiency of dry desulfurization, thereby significantly advancing the application of dry flue gas desulfurization technology.