Desulfurization wastewater treatment device and treatment method thereof

The invention provides a desulfurization wastewater treatment device, and is characterized in that an inlet flue duct of an air preheater (14) is provided with a parallel-connection flue duct (4) in parallel connection with the inlet flue duct and is used for independent heating of desulfurization wastewater; an inlet section of the parallel-connection flue duct (4) is provided with an atomizing nozzle (3) and a wastewater pump (5), and the atomizing nozzle (3) and the wastewater pump (5) are connected by a wastewater pipeline; an outlet of the parallel-connection flue duct (4) communicates with an air preheater outlet flue duct (13), the air preheater outlet flue duct (13) is provided with a low temperature coal economizer (8), and an outlet of the low temperature coal economizer (8) is connected with an electric precipitator (9) through a flue duct; a primary air duct and a secondary air duct of an inlet of the air preheater (14) are provided with air heaters (11). 本发明提供了种脱硫废水处理装置，其特征在于：在空气预热器(14)的入口烟道设置与其并