石化污泥离心脱水处理研究

独山子石化公司对原有石化污泥处理工艺进行了离心脱水技术改造，对影响离心脱水效果的因素进行了分析，确定了离心脱水法污泥处理量为8．4～12．8m^3／h，进离心机污泥含固率控制在1．43％～4．18％，离心机转速为3330r／min，差速为16～25r／min，聚丙烯酰胺投加量在3～8kg／t干泥，脱水后的泥饼含水率不大于85％，固相回收率不小于90％（平均）。改造后药剂节约费用为27．72万元/a，罐车拉运费用每年节约14万元左右。

Study of Centrifugal Dewatering in Treating Petrochemical Sludge

After modification of the existing treatment process of petrochemical sludge ,factors affecting the effect of centrifugal dewatering are analyzed to determine that the sludge treatment amount is 8.4-12.8m^3/h by using centrifugal dewatering,solid content in the centrifuge is controlled at 1.43%-4.18% ,the turning speed of the centrifuge is 3330r/min,the speed difference of the centrifuge is 16-25r/min,PAM dosing is 3-8kg/t（d.s.） ,water content of sludge cake after dewatering is ≤85%,and solid phase recovery is ≥90% （average）.After modification,chemicals cost is reduced by 277,200 Yuan/a,and tank car transportation fee is reduced by 140,000 Yuan/a.