低压渐进式电催化破乳装置预处理含聚废水试验研究

Experimental research on pretreatment of polymer-containing wastewater by low pressure progressive electro-catalytic demulsification equipment

针对含聚采油废水油含量高且破乳难等处理难题,研究设计了一种低压渐进式电催化联合破乳剂处理工艺,该渐进式电催化装置分为上中下3区,其中电极高度分别为5、5、15 cm,极板间距分别为0.4、1、2 cm,可以有效避免反应器内电场分布不均匀问题。通过正交试验确定最优运行条件为:电流20 A,电解时间2 h,破乳剂投加量400 mg/L。最优运行条件下处理后的含聚废水出水ρ(油)≤1000 mg/L,且可以连续稳定运行,比单独使用破乳剂可降低处理成本24.64%,该工艺可以有效降低破乳剂的加药量。

In view of the problem that polymer-containing wastewater contains high concentration of oil and hard to be demulsificated,a low pressure progressive electro-catalytic demulsification process was designed.The said progressive electro-catalytic equipment is divided into three zones:upper,middle and lower,the electrode height are 5,5,and 15 cm respectively,and the electrode plate spacing are 0.4,1 and 2 cm respectively,which can effectively avoid the uneven distribution of electric field in the reactor.Through orthogonal experiments,the optimal operating conditions are determined to be as follows:the electric current is 20 A,the electrolysis time is 2 h,the demulsifier dosage is 400 mg/L.Under the above conditions,the mass concentration of oil in the effluent water of the treated polymer-containing wastewater was not above 1000 mg/L,and the system could operate continuously and stably.Compared to using demulsifiers alone,the treatment cost of the said process reduced by 24.64%,and demulsifier dosage was also reduced effectively.