Refinery Wastewater Treatment
Refinery Wastewater Treatment
Currently Refinery Wastewater Pretreatment generally use regulation, grease, two flotation process.The first-stage flotation in which of the two-stage flotation is mostly CAF, the traditional secondary flotation dissolved air flotation. CAF course of treatment efficiency lower than the dissolved air flotation. Higher degreasing efficiency requirements of traditional secondary dissolved air flotation. Especially in the case of an impact load.
Biochemical and membrane separation systems. Currently oily wastewater biological treatment and follow-up treatment to use more A / O biochemical a coagulating sedimentation a BAF treatment process. This project uses hydrolysis acidification, aerobic level, intermediate precipitation, a combination of two aerobic biological treatment process, membrane separation. Which uses a completely mixed aerobic activated sludge in first-stage, extended aeration method using two aerobic.
Deodorizer. Sewage treatment malodorous gases each treatment structures, equipment produced catalytic oxidation.
The deodorization process has the following advantages: Full-term stable operation and high deodorizing efficiency. Adapted to the removal of various gaseous pollutants. To changes in gas temperature, humidity, flow and pollutant concentrations, the type of change has remained stable removal efficiency, can be adapted to the refinery temporarily stop, fault sewage treatment plant utility system, changes in oil properties, as a result of intermittent gas emissions gaseous pollutant concentration and composition changes.
The main processing equipment and structures
01.Adjustment tank: the conditioning tank with steel vertical fixed roof tanks, floating in the tank is set to close oil circulation to enhance the degreasing effect.
02.Flotation devices: inclined plate dissolved air flotation equipment for equipment, including flotation device body, dissolved air pumps, dissolved gas cylinders, scraping residue machine and scraper and control cabinet.
03.Pool acid hydrolysis: hydrolysis acidification tank semi-underground reinforced concrete structure, pool equipped submersible mixer.
04.An aerobic tank: an aerobic tank semi-underground reinforced concrete structure.
05.Intermediate sedimentation tank: intermediate sedimentation tanks using advection sedimentation tank semi-underground reinforced concrete structures, settling time to less than three hours.
06.Membrane cell: membrane cell made of reinforced concrete semi-underground structure, in order to ensure the membrane system has good water flux. Sustained, steady water, the system features water backwash, chemical backwash and chemical cleaning system.
07.Deodorizing device: This project mainly trace contaminant gases olefins, benzene, toluene, volatile phenol, ammonia, sulfur compounds, odor and other substances. Design uses centrifugal induced draft fan will lead to the exhaust gas purifying contaminated gas treatment device for centralized treatment. After the odor is treated to meet the “stench emission standards” in the two standards.
