摘要
油罐底泥是油田主要废弃物之一,具有脱水难、黏度大、毒性大等特点,油罐底泥减量化、资源化处理势在必行。针对油罐底泥较高的含水、含油特性,为了实现油罐底泥资源化利用,提出了物化破乳-脱稳离心处理油罐底泥,实验考察破乳剂种类及加量、破乳助剂种类及加量、破乳温度、破乳时间、离心转速对油罐底泥脱水率、脱油率的影响。通过大量实验筛选出最佳破乳剂WDP-9,最佳破乳助剂聚合氯化铝、聚丙烯酰胺复配。实验结果表明,在破乳剂WDP-9用量500mg·L^(-1)、聚合氯化铝用量75 mg·L^(-1)、聚丙烯酰胺用量75 mg·L^(-1)、破乳温度60℃、破乳时间2 h、离心转速10 000 r·min^(-1)、2次离心时间均为10 min的条件下,物化破乳-脱稳离心处理油罐底泥脱水率为85.70%,脱油率67.10%。
Oil tank bottom sludge causes great harm in the oilfield environment because of its high oil content,high viscosity,and high toxicity. It is important to develop a solution to recycle the oil from oil tank bottom sludge while minimizing excess sludge production. In this paper,combined with the characteristics of high content of water and oil,a physicochemical demulsification-destabilization centrifugal method was developed to achieve resource utilization of oily sludge. The effects of types of demulsifier,demulsifier dosage,types of demulsification additives,demulsification additive dosage,demulsification temperature,demulsification time,centrifugal velocity on dewatering efficiency,and the de-oiling rate of oil tank bottom sludge were investigated. The best demulsifier was WDP-9,based on a number of experiments,and was a compound of polyaluminium chloride and polyacrylamide. The results showed that the dewatering efficiency and de-oiling rate of oil tank bottom sludge was85. 70% and 67. 10%,respectively. The optimum parameters were as follows： WDP-9 concentration of 500mg·L^-1,polyaluminium chloride concentration of 75 mg·L^-1,polyacrylamide concentration of 75 mg·L^-1,demulsification temperature of 60 ℃,demulsification time of 2 h,centrifugal velocity of 10 000 r·min^-1,and centrifugation two times,for 10 min each time.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第12期7188-7194,共7页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51104126)
关键词
油罐底泥
物化破乳
脱稳离心
oil tank bottom sludge
physicochemical demulsification
estabilization centrifugal
