When a 5 000 t/d cement clinker production line adopts dry desulfurization technology, there are problems such as the desulfurization effect being greatly affected by kiln operating conditions, the thermal stability of the kiln system being affected by water desulfurizers, and the possibility of "sticking bags" in bag dust collectors at the preheater. Using conventional wet desulfurization technology, although the desulfurization effect is stable, there is a problem of environmental pollution caused by wet flue gas plume emissions. A comparative analysis is conducted on the three technical processes and working principles of wet desulfurization combined with wet plume gas treatment, namely "flue gas condensation, flue gas heating, and flue gas condensation reheating". After adopting the wet desulfurization combined with flue gas heating technology to treat wet flue gas emissions, the SO₂ emission concentration of the kiln preheater flue gas was ≤ 50mg/Nm³, the humidity content of the flue gas was <65g/kg, and there was no white smoke emission from the kiln preheater chimney, it achieved the expected transformation goals.