Wastewater produced by flue gas wet desulfurization contains many kinds of impurities and the disposal volume is huge

the wastewater's treatment and reusing problems need to be solved urgently.Conventional methods such as mixed stack

hydraulic ash flushing and chemical processing

have certain deficiencies

while the spray evaporation method is simple and reliable in operation

which can achieve near zero discharge of the desulfurization wastewater.However

it may cause corrosion of the flue and electrostatic precipitator due to the incomplete evaporation of the liquid droplets.To solve this problem

this paper improved the conventional spray evaporation process

used evaporation tower instead of gas duct evaporation to carry out theoretical analysis and heat balance calculation for the evaporation tower model.Moreover

the MATLAB software was applied and changing curves of the evaporation wastewater amount with the flue gas flow rate and temperature was plotted.At last

the calculated heat balance was checked by using the foreign industrial application examples.The results show that

the industrial application examples agree well with the heat balance calculation results.In the practical application

reasonable redistribution of the extracted flue gas flow and its volume proportion should be performed combing with the model

and the power plant should choose the appropriate desulfurization waste water treatment process according to their actual conditions.