A Sudy On Sewage Treatment Of Daniudi Gas Field

In this paper, aiming at the Daniudi east contain alcohol wastewater treatment methanol recovery system, corrosion and scale of the processed sewage containing alcohol and water reach back. Standard From the side of the daniudi containing methanol wastewater analysis and the influence of the sewage anti-corrosion, antiscale factor analysis and research in the region and water containing alcohol and characteristics of the best compatibility layer injection sewage treatment.Firstly, the water quality characteristics of wastewater containing alcohol into the analysis test:this is the "four high" characteristics of low, with great difficulty. First synthesized in the laboratory task for preprocessing of wastewater containing alcohol UT6-1,2-UT6two kinds of coagulants and flocculent type UT6-7. Researchers in the field through20days of data collection for test and experiment,300ppm filling the photos UT6-1type of sewage treatment, the30ppm UT6-2sewage agents and2ppm UT6-7type of sewage treatment processing of the daniudi contain alcohol wastewater effect is good, can meet the production requirements.Secondly, the output of the daniudi, although high salinity water out of the pretreatment in large amounts of calcium, magnesium ions, but after the treatment of wastewater containing parts in calcium and magnesium ions are easily scaling trend. According to this phenomenon in the field through continuous sampling test evaluation of10days from ML-421type corrosion inhibition of pretreatment of sewage has good corrosion-proof scale-preventative agent effect, its best charging concentration in20-25ppm anti-scaling rate between the potion>95%of sewage disposal equipment, corrosion rate than0.076mm/a.Finally, contain alcohol wastewater is a complex system, water contains many impurities, for all kinds of microbe growth and reproduction provides a good environment. By sulfate-reducing bacteria (SRB) and saprophytic bacteria (TGB), and the diameter of the TGB for10-30mu m, the diameter of the SRB for5-10mu m. The daniudi belongs to the low permeability gas reservoirs, high pressure water now, high pressure water injection of pipeline and injection equipment will be formed, a large number of SRB and threatened with water injection formation TGB to return after the jam, will improve layer injection pressure, affect the normal production. According to the different microbicides are system test, evaluation of chlorine dioxide sterilization effect from the best use of the concentration of40-50ppm.