Gypsum cyclone is an important equipment of wet flue gas desulfurization system (WFGD) in power plant and air core is a special phenomenon in it. Instability of air core may cause some problems

such as waste of energy

unsteady flow

and lower separation efficiency. A new conical central solid rod was designed aiming at eliminating air core and improving the performance of gypsum cyclone. Experiments were carried out in order to have further understanding of the negative influence by air core. At the same time

the performance of different gypsum cyclones with central rod

including production capacity

concentration of underflow

solid content in underflow and particle size distribution was measured and compared

and the effects on above-mentioned parameters by different inlet pressures were investigated. By inserting a conical central rod

production and solid content in underflow could be increased by 18% and 22% respectively. The adaptability to fluctuating inlet pressure could be improved obviously

and the amount of fine particles in underflow was effectively reduced.