Treatment effect and flocculation mechanism of abandoned drilling mud by different flocculants
In order to reveal the flocculation effect of different flocculants on abandoned drilling mud,the method of break-ing flocculation was used to treat the abandoned coalbed methane drilling mud with high water content and complex compo-sition,which was taken from Shanxi Province.The effect of flocculant type,flocculant amount,and other factors on the floc-culation performance of the abandoned drilling mud was analyzed.The flocculation mechanism was explored by scanning electron microscopy(SEM).The results showed that the dosage of aluminum sulfate with 2000 mg/L had the best floccula-tion effect,and the dosage of non-ionic polyacrylamide(NPAM)with 10 mg/L had the best co-treatment effect.The liquid phase chromaticity,CODCr,suspended matter content and water content of mud cake after treatment were 20 times,61.98,32.50 mg/L and 78.64%respectively.The electric neutralization of aluminum sulfate could produce good synergistic effect with the bridge trapping of NPAM,which could significantly accelerate the flocculation settlement of particles in the mud,increasing the volume of volume of flocculation and the degree of porosity,so as to reduce the content of pollutants in liquid phase and the moisture content of mud cake.The results of this study could provide useful guidance and theoretical basis for the flocculation treatment of waste drilling mud.
waste mudflocculationcollaborative processingorganic coagulant aid
万方数据
维普
