Lime slurry nozzle is the key equipment of flue gas drying desulfurization system.The nozzle atomization performance at different nozzle structural parameters was experimentally studied by using Win212-2 laser particle distribution analyzer.The influence of structural parameters on the lime slurry atomization and optimal nozzle structure were obtained.Under the atomizing pressure of 0.8 MPa

the nozzle showed good atomization performance in the condition of rotational channel numbers of 4

rotational channel expanding angle of 6°

rotational chamber shrinking angle of 90°

D/d=4.4—6.4

D/b=6—8 and L/b=3.3—4.0.The atomizing granularity and atomizing angle of the optimal nozzle were respectively less than 100 μm and about 70°.The atomization performance of optimal nozzle was greatly improved as compared with ordinary nozzle.