摘要：

Spraying nozzles orderly distributed in Methanol-to-Propylene(MTP) reactor are outside-atomization atomizers with two channels for feeding different reactants, and their atomization performance is largely affected by the sizes of liquid-phase pore diameters, especially the Sauter mean diameter(SMD) and particle size distribution(PSD). The nozzles designed with different pore diameters were investigated by cold model experiments selected with a nitrogen-water system to find the relationships between liquid mass flow rate and pressure differential at different pore diameters and the effects of pore diameters on both SMD and PSD at different gas-liquid mass ratios(G/L). The results showed that when G/L was in 8.70 to 20.32, with the increase of pore diameters,SMDs first decreased and then increased in the range of 0.2μm to 2.6μm. PSD gradually broadened with the increase of mass flow rate after primary spraying, however, the variation of PSD corresponding to secondary spraying was between 5.1μm to 48.8μm.

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