摘要
废油基钻井液中的油类、COD、总Cr含量均严重超标,为主要污染物。对废油基钻井液的除油处理进行了实验研究,确定了先向废油基钻井液中加入除油剂脱除其中的油,通过闪蒸或分馏方式回收除油剂,再向脱除的油中加入除盐剂脱除油中所含盐的实验方案。通过实验研究,找出了适宜的除油剂PE2040,并对影响其除油效果的因素如加量、油泥分离方式、除油温度和除油剂回收方式进行了探讨。结果表明:室温下向废油基钻井液中加入54.4mg/LPE2040,自然沉降15min,除油率可达55.1%;再向油中加入20g/L的NaHCO3,在50℃水浴中恒温一定时间可有效除去油中的盐。脱出的油可用于配制油基钻井液或作他用,回收的除油剂可再用于除油。
In waste oil-based drilling fluid, oil, COD and the total chromium beyond the scale are the main pollutants. Deoiling treatment of oil-based drilling fluid was studied by laboratory experiments with an experimental program determined. In the procedure, firstly, add deoiling agent into the waste fluid to remove the oil; secondly, recovery the deoiling agent by flash distillation or fractionation; finally, add desalter into the separated oil to remove salts. An appropriate deoiling agent PE-2040 was selected, and the influence factors such as the agent dose, oil separation method, temperature and the agent recovery method were studied on the oil removal efficiency. Results indicates that the removal efficiency approach 55.1% when adding 54.4 mg/L PE-2040 into the waste oil based drilling fluid, and setting for 15 min at atmosphere temperature. If further add 20 g/L NaHCO 3 solution into the oil, and stay it in thermostatic bath at 50 ℃, the salt will be removed. The separated oil may be used to formulate oil-based drilling fluid or in other fields, and the deoiling agent recovered may be used in oil separation again.
出处
《钻井液与完井液》
CAS
北大核心
2005年第1期12-13,18,共3页
Drilling Fluid & Completion Fluid
