Aiming at the problems existing in the traditional dry desulfurization technology of cement kiln, a hot raw meal desulfurization technology of cement kiln is developed. Based on the traditional dry desulfurization with furnace hot raw meal, this technology optimizes the dry desulfurization system of cement kiln by means of computational fluid dynamics (CFD) numerical simulation, and significantly improves the desulfurization reaction efficiency. Specifically, the technology has the following characteristics: (1) strengthening the mixing effect of hot raw meal and SO2 in flue gas. The position of raw meal feeding and desulfurization is optimized by CFD simulation, which helps to improve the efficiency of raw meal heating and desulfurization system.
（2）延长了脱硫反应时间。通过对传统水泥窑干法脱硫系统的优化，显著扩大了脱硫反应区域，延长了脱硫反应时间。使得脱硫反应时间由传统的1~2 s延长至8~10 s，从而显著提升了脱硫反应效率。
(2) The desulfurization reaction time was prolonged. By optimizing the traditional dry desulfurization system of cement kiln, the desulfurization reaction area is significantly expanded and the desulfurization reaction time is prolonged. The desulfurization reaction time is extended from 1 ~ 2 s to 8 ~ 10 s, which significantly improves the desulfurization reaction efficiency.
(3) The reaction activity of desulfurizer is improved *. The hot raw meal is directly extracted from the furnace, which contains uncooled oxides such as Cao, K2O and Na2O. It has the advantages of high reactivity, developed pore structure in the particles and large specific surface area. Therefore, the reaction rate with SO2 is higher.
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