纳米TiO2处理河南油田压裂废水技术研究

通过对压裂废液成分的分析,结合纳米催化氧化的原理和特点,提出了一套纳米光化技术处理压裂废液的方案,即:采用混凝—氧化—吸附—光化法处理压裂液,加入0.25 g/L混凝剂C-10、.1 g/L助凝剂C-6、0.05g/L助凝剂C-7、0.3 mg/L氧化剂O-1和1 g/L吸附剂A-1,最后进行光化处理。处理后出水进入系统水后没有生成沉淀、气体等,对系统水水质没有较大改变,处理后出水的pH值为7.11、含铁为0.5 mg/L、含油为0.5 mg/L、含硫为7.6 mg/L、细菌为76个/mL、悬浮物为4.7 mg/L,达到了回注标准。该技术已经在河南油田进行了中试,取得了较好的效果。

Fracturing Fluid Waste liquid Disposal By Using Nanometer TiO2 in He Nan Oil Field

A nanometer photochemical disposal technology for the waste liquid of fracturing fluids was developed based on the principle of nanometer catalytic oxidation according to the analysis of waste liquid ingredient.That was a successive process of coagulation,oxidation,Absorption and final photochemical disposal.It was recommended that 0.25 g/L of a coagulant,0.1 g/L of C-6 and 0.05 g/L of C7 which were both the coagulant aid,0.3 g/L of O-1 which was a oxidant,1 g/L of A-1 which was a adsorbent.It could be seen from the results that the treated waste liquid could be compatible with recycling water without precipitates and gas.The treated liquid had a 7.11 of pH and contained 0.5 mg/L of iron,0.5 mg/L of oil,7.6 mg/L of sulfide,76 bacteria/mL and 4.7 mg/L suspended pollutant,so it met the standard of recirculated water.A pilot field test was successfully conducted in Henan oilfield and favorable results were obtained.