对含盐废水蒸发器影响管束结垢腐蚀因素的研究

Study on Factors Affecting Corrosion of Tube and Tube in Salt-containing Wastewater Evaporator

蒸发器处理装置处理来自含盐废水预处理系统(PT)反渗透(RO)薄膜渗透工艺的浓水55m^3/h,该水流与来自电厂的74m^3/h的废水汇合,流量共计129m^3/h。汇合后的水流被输送至一台缓冲罐,经缓冲稳压后的废水被输送至一台进料罐,在进料罐中与硫酸、氯化钙及防垢剂混合,然后进入接种过的含盐废水蒸发器E1进行蒸发处理,得到的主蒸汽凝液与经过空冷器冷凝后的产品水合并入罐供电厂回用,而含盐分较高的浓液经过结晶器处理系统浓缩形成固体硫酸铵外卖。分析了蒸发器操作过程中的一些影响蒸发器换热管束结垢腐蚀的一些影响因素。

The evaporator treatment unit treats 55 m3/h of concentrated water from the salt water pretreatment system （PT） reverse osmosis （RO） membrane infiltration process, which converges with 74 m3/h of wastewater from the power plant.m3/h.The merged water is delivered to a buffer tank, and the buffered water is transported to a feed tank, mixed with sulfuric acid, calcium chloride and scale in the feed tank, and then into the inoculated The salt waste water evaporator E1 is subjected to evaporation treatment, and the resulting main steam condensate is combined with the product condensed by the air cooler into the tank power plant, and the higher concentration of the concentrated liquid is concentrated through the crystallization treatment system to form solid sulfuric acid Ammonium takeaway.In this paper, some factors influencing the scaling corrosion of evaporator heat transfer tube bundles during the operation of evaporator are analyzed.