中文摘要：

为了保证注水水质达标,油田污水站采用连续排泥工艺降低悬浮物和泥沙的含量,由此产生大量含水率高的污泥,造成运输费用及后续无害化处理费用的增加,因此,需要对污泥进行减量处理。以卧螺离心机为关键设备,设计了1套污泥离心脱水减量工艺。通过现场试验得到转速、差速、絮凝剂投加量、温度对减量效果的作用规律。在一定范围内,转速越高、差速越低、絮凝剂投加量越大、温度越高,处理后的污泥含水越少。采用正交试验方法优化得到工艺最佳运行参数：转速为2 500 r/min,差速为9 r/min,加药量为225 g/m3,温度为55℃。处理后,平均含水率从入口的97.37%下降到出泥口的59.17%,平均含固率从入口的1.73%上升到出泥口的33.72%。离心机出水口和出泥口分流比范围为24.14∶1-33.19∶1,对应的污泥减量比例为96.02%-97.08%,污泥减量效果很好。

英文摘要：

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-3and temperature at 55℃.After treatment,the average water content in sludge decreases from 97. 37% at the inlet to 59. 17% at the sludgeoutlet,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.