The Experimental Study Of A New Semi-Dry Desulfurization Using Spray Spouted Bed

A new semi-dry desulfurization technique using spray spouted bed was proposed which connected with fluidization of spouted bed and spray-drying technique.In this paper,the characteristics of spouting was studied.The formulas of minimal spouted velocity, maximal spouted pressure decrease of the bed and the spouting height were put forward. Some effects on SO2 removal were tested, such as Ca/S molar ratio, spray density and spray location, inlet concentration of SO2, static bed height , gas inlet temperature , approach to saturation temperature, spouted velocity, diameter of spouted particles and three additives (CaCl2, NaOH, NaCl). SO2 removal efficiency was enhanced by increasing Ca/S molar ratio, inlet concentration of SO2, static bed height and decreasing gas inlet temperature, approach to saturation temperature , spouted velocity and diameter of spouted particles. It was demonstrated that SO2 removal of 92% can achieved at Ca/S = 1 when approach to saturation temperature was 7℃ and three kinds of additives could impove the removal efficiency,and the effects of NaOH and CaCl2 are better than that of NaCl.In the end,the desulfurization process and mechanism of additives improving the SO2 removal efficiency were analyzed. The mathematic correlative formula was proposed and experimental result was agreed with calculational result.