In　the　reaction　process　of　carbonate　desulfurization　lead　paste,　the　produced　PbCO3　is　easily　wrapped　in　the　outer　periphery　of　PbSO4　to　form　a　product　layer,　hindering　the　mass　transfer　process.　Therefore,　it　is　necessary　to　break　the　PbCO3　product　layer.　In　this　work,　the　rotor　stator-reinforced　reactor　was　selected　as　the　enhanced　desulfurization　reactor　for　the　purpose　of　breaking　the　PbCO3　product　layer　and　promoting　mass　transfer.　The　breakage　process　of　the　PbCO3　product　layer　generated　during　the　PbSO4　desulfurization　was　modeled.　Computational　fluid　dynamics　simulation　to　the　rotation　conditions　was　carried　out　to　theoretically　analyze　the　fluid　flow　characteristics　of　PbSO4　slurry　and　the　wall　shear　stress　affecting　the　breakage　of　PbCO3　product　layer.　By　optimizing　the　rotation　conditions,　the　distribution　ratio　of　effective　rotor　wall　shear　stress　range　achieved　96.1%,　and　the　stator　wall　shear　stress　range　reached　99.15%　under　a　rotation　of　2000　r.min(-1).　The　research　work　provides　a　reference　for　analysis　of　the　mechanism　of　product　layer　breakage　in　the　PbSO4　desulfurization　process,　and　gives　a　clear　and　intuitive　systematic　study　on　the　fluid　flow　characteristics　and　wall　shear　stress　of　the　desulfurization　reactor.　(c)　2023　The　Chemical　Industry　and　Engineering　Society　of　China,　and　Chemical　Industry　Press　Co.,　Ltd.　All　rights　reserved.