Abstract: Taking the desulfurization wastewater produced from the operation of coal-fired power plants as the research object， the mechanical atomization evaporation technology applied for treating desulfurization wastewater is discussed.To make theoretical study， the main factors affecting evaporation are found out， which includes droplet diameter， temperature and wind speed. Then，based on the shortcomings of the existing natural evaporation technology，this technology is improved by installing atomization devices， increasing the heat of water body， and accelerating the wind velocity during the evaporation process， which integrates and turns out to be the mechanical atomization evaporation technology.At present，the mechanical atomization evaporation technology can effectively treat the desulfurization wastewater in coal-fired power plants and the wastewater from coal chemical industry， and has achieved favorable outcomes. However， application of this technology might lead to environmental pollution.To overcome these shortcomings， the mechanical atomization evaporation technology can be improved by adopting multi-energy coupling，which can realize its low-cost zero-emission operation.

Key words: desulfurization wastewater, mechanical atomization evaporation, natural evaporation, mandatory evaporation, multi-energy coupling