应用浅池理论与聚结技术改进油田污水处理系统

APPLYING SHALLOW POOL THEORY AND COALESCENCE TECHNOLOGY TO IMPROVE OILY WATER TREATMENT SYSTEM IN OILFIELD

通过对油田污水处理系统各级污水处理设备的分析,发现了撇油罐是影响外排水质量的主要因素,进而对撇油罐结构、原理及工艺过程进行了分析,找出了影响撇油罐除油效率的主要原因,将浅池理论与聚结技术相结合,并考虑流体变化因素,将撇油罐进料整流板改造为侧向波纹板聚结分离器,同时将清水槽固定堰板改造为可调活动堰板,改造后效果良好,配合其它污水处理设施,将外排生产水OIW(水中含油量)降至20mg·L-1以下,达到了海洋石油勘探开发污染物排放浓度限值(GB4914-2008)中的一级海域排放标准,环保效益与社会经济效益显著。

All of oily watertreatment components are analyzed. The primary component influencing produced watereffluent quality is found which is Oil Skim Drum. The furtherstudies on the structure, principle and process of Oil Skim Drum are executed. The key factors influencing oil removal efficiency of Oil Skim Drum are discovered. The inlet rectifying plate is replaced by corrugated plates packing by applying Shallow Pool Theory and Coalescence Technology. The fixed weirin clarified waterzone is reformed to adjustable weirby considering liquid change factor. The better effect is achieved from the improvement. Combined with otheroily watertreatment components, OIW of effluent produced wateris decreased to less than 20 mg·L-1, up to Ⅰ-class sea area effluent criteria specified in effluent limitations forpollutants from offshore petroleum exploration and production （GB 4914-2008）.The environmental, social and economic benefits are notable.