Experimental Research On The Microwave Treatment Of Oily Waste Water With Sensitizer

Microwave treatment of oily waste water, which has lots of advantages such as high efficiency, energy-saving and pollution free, is very important to the oil production and environmental protection. Adding salt to improve treatment efficiency of microwave breaking of emulsion has been a new way to treat oily waste water.The article made a systematical research on the mechanism of effects of salt on microwave breaking of emulsion.First of all, experiments of microwave parameters (power and action time)'s effects on the oil removal rate and surface tension were carried. Meanwhile,affecting law of the elements including ion nature, valence, radius and concentration was studied by a large number of experimental studies.By using uniform design, the relation between microwave power, action time, salt concentration, ionic radius and deoiling rate was studied, and the empirical formula was fitted.According to the relevant thesis of microwave heating and the emulsion fluid, this paper analyzed the mechanism of effects of salt on microwave breaking of emulsion combined with the nature of inorganic ions.Finally, the model of emulsion droplets and the force model of inorganic ions in the electromagnetic field were established.Also, the mechanism of salt for microwave demulsification from the perspective of emulsifying film strength was analyzed.Experimental results and theoretical analysis shows that a small amount of salts can significantly promote the effect of microwave demulsification. Microwave parameters and the ion concentration are the main factors which promotes the effects,and inorganic salts'effects are related to ionic radius, valence, the activity coefficient and concentration of salts.The reason is that mineral ions in the electromagnetic field are making periodic reciprocating motion,which continuously reduce the impact strength of emulsion film, even to break, and achieves the deoiling effects.