ADC发泡剂废水处理工艺研究  

Study on ADC sponging agent wastewater treatment technology

作　　者：陈丽芳[1] 党来芳 徐璐[1] 

机构地区：[1]天津科技大学化工与材料学院,天津300457

出　　处：《应用化工》2016年第5期844-846,849,共4页Applied Chemical Industry

基　　金：国家海洋公益专项项目(201405008);天津市自然科学基金(13JCYBJC18600)

摘　　要：ADC发泡剂废水中含有大量的氯化钠、氯化铵以及少量的尿素,通过50,75,100℃下等温蒸发和冷却结晶析盐,可将ADC发泡剂废水资源化利用。在等温蒸发过程中,ADC发泡剂废水第一阶段析出Na Cl,第二阶段为Na Cl和NH_4Cl二盐共析;等温蒸发至Na Cl和NH_4Cl二盐共析时,100℃等温蒸发过程中氯化钠的析出率达到最大值,为82.42%;整个蒸发过程中尿素不断富集,没有析出;针对100℃的Na Cl和NH_4Cl共饱液冷却至20℃时,固相中只有氯化铵,氯化铵的析出率49.20%。ADC sponging agent wastewater contains a large amount of sodium chloride,ammonium chloride and a little urea. Researching salting-out law of the wastewater can reduce salt content of wastewater for resource utilization in different temperature isothermal evaporation. It is concluded that sodium chloride is separated out at first and then is ammonium chloride; When the liquid reaches co-saturated point of sodium chloride and ammonium chloride in the process of isothermal evaporation,precipitation rate of sodium chloride is 82. 42%,which is the maximal at 100 ℃; urea have concentrated during isothermal evaporation process and there are no urea solid in the process of cooling crystallization. While 100 ℃ co-saturated solution is cooled to 20 ℃,solid phase only has ammonium chloride and precipitation rate of ammonium chloride is 49. 20%.

关 键 词：ADC发泡剂 废水 等温蒸发 冷却结晶 

分 类 号：TQ085.4[化学工程] TQ110.9