膜浓缩+蒸发塘处理工艺在燃气电厂废水零排放中的应用

Application of membrane concentration+evaporation pond process in zero discharge treatment of wastewater from gas-fired power plant

在对以煤化工尾气为燃料的燃气电厂脱硫废水进行分析的基础上,对燃气电厂高盐废水零排放提出了“膜浓缩+蒸发塘”的处理工艺路线,采用双碱法软化+陶瓷超滤膜预处理及反渗透膜浓缩减量工艺,浓缩减量后废水通过蒸发塘处理。提出采用带机械雾化蒸发装置的蒸发塘作为高盐废水零排放处理末端固化工艺,并给出了蒸发塘和机械雾化蒸发装置的设计计算过程。

Based on the analysis on the desulfurization wastewater from gas-fired power plants fueled by coal chemical exhaust gas, a treatment process of “membrane concentration+evaporation pond” is proposed for the zero-discharge treatment of high salinity wastewater from gas-fired power plants.In which, the double alkali softening+ceramic ultrafiltration membrane pretreatment process and the reverse osmosis membrane concentration for reduction of wastewater prior of evaporation pond are employed, and the concentrated wastewater is treated by evaporation pond.The evaporation pond with mechanical atomization evaporation device is used as the terminal solidification process for zero discharge treatment of high salinity wastewater, and the design calculation process for the evaporation pond and the mechanical atomization evaporation device are given.