Experimental study on the CFB-FGD of semi-dry process in a demo plant

The CFB-FGD demo-plant was established near the pilot power plant of Tsinghua University, with the flue gas capacity of 20 000 Nm(3)/h. The detailed structure and characteristics of the absorber are described in the paper. A series of experiments about that the desulfurization efficiency were influenced by various factors were conducted on this facility, such as sorbent properties, ratio of Ca/S, solids concentration, Approach to Saturation Temperature and CaCl2 additives. in the meantime the practical problems to be considered in the commercial design were studied too. The experiments shows that the 85% desulfurization efficiency is achieved while the ratio of Ca/S is 1.3 and the ASAT is 7degreesC, under the condition that the additive is added in the slurry the ASAT is reduced slightly, the desulfurization efficiency can reach 90% This demo-plant established the strong base for the commercial use of the technology.