The Experimental Study On The Equipment And The Desulfurization Of Semi-dry FGD For The Spouted Bed

In this paper, the advantage and disadvantage of various FGD methods and equipment were summarized, and a new equipment of semi-dry FGD for the spouted bed was proposed. The characteristics of its spouting and desulfurization were studied, and the formula of minimum spouted velocity was putted forward. The relations among the spouting height, the pressure decrease of the bed and the flow rate, the diameter of the particles, the height of the spouted bed were studied. At the same time, Ca(OH)2 slurry was used as SO2 sorbent. The influences of the Ca/S molar ratio and the diameter, the mass of the particles on the desulfurization efficiency were analyzed. The result indicated that the operation pressure drop for the spouted bed was proportional to the height of the spouted bed and varied inversely with the diameter of the particles; the flow rate had little influence on the operation pressure drop. The spouting height was proportional to the flow rate and varied inversely with the diameter of particles and the height of the spouted bed. There was a best value between the desulfurization efficiency and the mass of the particles. Ca/S molar ratio had an obvious effect on the desulfurization efficiency. The desulfurization efficiency could reach 80% under the condition of the Ca/S molar ratio=l .2~ 1.4.