Water-sparged aerocyclone(WSA)is a new type of air stripping equipment with high efficiency for ammonia removal.In order to improve its mass transfer performance and establish design principles

spray hole distribution of WSA was optimized by means of theoretical analysis and experimental method.A new concept

critical distance of spray holes

lc

and its calculation formula were put forward.The results show that the WSA with square arrangement of spray holes exhibits higher mass transfer efficiency than that with triangle arrangement of spray holes in air stripping of ammonia.The distance between adjacent spray holes of the WSA has obvious effect on volumetric mass transfer coefficient.The optimal distance is about 1.28lc and the perforation area is about 78% of the central tube height in the WSA.These results could be used as a guide for the design of WSA with good mass transfer performance.