Evaluation On The Application Effects Of Oil-containing Waste Water Treatment Technology In Zizhou-Mizhi Gasfield

Zizhou gas oil-containing wastewater using alcohol to go through a simple chemical flocculation treatment into the methanol distillation column to achieve water and the effective separation of methanol, will be methanol recovery, water re-injection formation. As the dosing system problems, can not guarantee the normal pharmaceutical joined so that the processing device problems are:waste water cooler tube plugging; methanol distillation column at the end of the water too dirty, affecting the water re-injection, resulting in back Note the pressure increase; coupled with a high level of alcohol-containing wastewater, condensate oil content was high, so that alcohol-containing wastewater treatment more difficult, so to solve the above problem, we must carry out for different alcohol content of oil-containing wastewater pretreatment technology research.Through on-site research, analysis of the operation of sewage treatment process and the status of a few problems in carrying out oil with alcohol and pharmaceutical waste water treatment process optimization is proposed for sub-Island gas field, gas production of pharmaceutical and process sewage treatment programs; analysis of oil-bearing the amount of methanol distillation process, the impact of dirty water, the reasons for the tower bottom and methanol distillation unit smooth operation of the impact of factors; preferred a good performance for sub-continents working conditions of the oil-gas-containing alcohol treatment agents, corrosion Formulation. Sewage Treatment Pharmacy optimal formula:pH value regulator of NaOH, pH value of the optimum range of7.5～8.5; In addition to iron as H2O2, plus amount of0.10～0.20mL/L; coagulant for the PAC, plus amount of30mg/L; coagulant for the12million cationic PAM, plus the amount of1.0～2.0mg/L; reaction time is greater than0.5hours.In the current treatment process conditions, the methanol recovery system is running well, fully meet the natural gas processing plant to the methanol recovery system security, long-term stable operation requirements.