The Chemical Water Purification Plant of the Water Operation Department of Maoming Petrochemical Company was put into operation on 1996, which is responsible for the treatment and discharge of industrial sewage, domestic sewage, net production wastewater, later rainwater wastewater and high-concentration sewage discharged from industrial parks around the plant. For 19 years, they have paid close attention to environmental protection management, devoted themselves to creating a green environmental protection demonstration window, and kept 100% qualified discharge of wastewater for 19 years.
The average value of COD (chemical oxygen demand) is 36. 10 mg/L, and the concentration of ammonia nitrogen is1.33mg/L. The effluent index ranks among the top in the same industry in Sinopec.
A few days ago, Maoming Petrochemical Company built a new 300-ton/hour high-concentration sewage treatment plant with a total investment of 65.438+0.4 billion yuan, which was officially put into use. So far, the sewage treatment capacity of Maoming Petrochemical Refinery Area has reached 1000 tons/hour, which can meet the needs of high and low concentration sewage water quality treatment, oil refining reconstruction and expansion, and new sewage discharge in coal-based hydrogen production projects. This is another achievement of Maoming Petrochemical in protecting clear water and blue sky in recent years.
On May 14, the separation tank of advanced catalytic oxidation unit was built in the refinery oil water treatment plant of Maoming Petrochemical Water Operation Department. After the pump is debugged, the system starts trial operation. So far, the system runs stably and the oil-water separation effect is obvious.
The project includes the newly-built advanced oxidation machine room for catalytic flotation, four electrocatalysis and catalytic beds and catalytic separation tanks. Advanced catalytic air flotation combined process technology is adopted to reduce sludge output and reagent consumption, and at the same time achieve the purpose of promoting oil-water demulsification and improving oil-water separation effect. After put into use, it can further purify the water quality and ensure the high-quality discharge of the system effluent.
The low concentration sewage treatment system with 700 cubic meters/hour oil refining has high crude oil content and large sludge. Although the water color of multiphase bubbling water that has been put into use after transformation is clear, the strength of contact area is uneven, and scum accumulates at the corner of contact area. At the same time, the oil layer in the biochemical tank that has been running continuously for 17 years adheres to the filler and the tank wall, and the continuous dissolution affects the effluent quality of the biochemical unit O2 tank.
"Catalytic combination technology integrates a variety of new technologies. Using the gas activated by electric field as gas source, the activated gas with negative ions is generated in the activation energy generator. After entering the catalytic bed and mixing with water, the hydroxyl radical can play an active role in air flotation, coagulation, precipitation and filtration, which can change the stable structure of toxic substances in pollutants in a short time and fully improve the degradable characteristics of pollutants. " Tan, the technician in charge of the project implementation, happily introduced: "After this technology is combined with biochemical technology, highly stable organic poisons are oxidized and decomposed by free radicals with strong oxidizing ability, which are first decomposed into easily biodegradable intermediate products, and then removed by adsorption and temporary storage or biological assimilation. It is fundamentally beneficial to water purification and improve the treatment efficiency and impact resistance of sewage treatment system.
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