The flue gas desulfuration technology of SAAS used for the flue gas desulfuration system of 4×260 t/h circulating fluidized bed (CFB) boilers has desulfuration efficiency of 95%~99%

the SO2 content in tail gas being (50~190) mg/m3

the by-product of desulfuration

i.e. ammonium sulphate

satisfying the standard concerning chemical fertilizer of ammonium sulphate. The practice shows that the technological process of SAAS is simple

having low energy consumption

short period of construction

and small area of land occupation

and can turn disadvantages into benefits

without secondary pollution.