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）延長了脫硫反應時間。通過對傳統水泥窯干法脫硫系統的優化，顯著擴大了脫硫反應區域，延長了脫硫反應時間。使得脫硫反應時間由傳統的1~2 s延長至8~10 s，從而顯著提升了脫硫反應效率。
(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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