Abstract: In order to ensure the quality of added water to meet the standards,the oilfield sewage station uses continuous sludge discharge process to reduce the content of suspended solids and sediment in water,which brings about a large amount of sludge with high water content,and increases the cost in transport and subsequent harmless treatment.Therefore,it is necessary to reduce the generated amount of sludge.A centrifugal dehydration reduction process for sludge is designed using decanter centrifuge as the key equipment.The influence rules of the rotational speed,differential speed,flocculant dosage and temperature on the reduction effect are obtained through site test.In a certain range,the higher rotational speed,the lower differential speed,the larger flocculant dosage,and the higher temperature all benefit the reduction of water content in treated sludge.The optimum operating parameters obtained by orthogonal test method are as follows:rotational speed is 2 500 r·min-1,differential speed is 9 r·min-1,flocculant dosage is 225 g·m-3 and temperature at 55℃.After treatment,the average water content in sludge decreases from 97.37% at the inlet to 59.17% at the sludge-outlet,and the average solid content increases from 1.73% at the inlet to 33.72% at the sludge-outlet.The split ratio of the water-outlet to sludge-outlet of the decanter centrifuge is 24.14:1-33.19:1,the corresponding sludge reduction ratio is 96.02%-97.08%,representing a good sludge reduction effect.
王兴旺, 魏立新, 刘鹏, 李凯欣, 成毅, 张煜. 油田污泥离心脱水减量处理现场试验[J]. 现代化工, 2017, 37(10): 93-96.
WANG Xing-wang, WEI Li-xin, LIU Peng, LI Kai-xin, CHENG Yi, ZHANG Yu. Site test for centrifugal dehydration reduction treatment of oilfield sludge. Modern Chemical Industry, 2017, 37(10): 93-96.