What are the pretreatment facilities for atmospheric and vacuum electric desalination wastewater from oil refining?

Did the original poster ask about the pre-treatment process for sewage discharged from electric desalination before entering the sewage treatment plant?

Yes, that’s it, haha, please give me some advice! ! !

I saw it online, I don’t know if it will be helpful to you. The environmental impact report of the PetroChina Sichuan Petrochemical 10 million tons/year refining project environmental protection project includes two parts. One part is the environmental protection facilities of the refining project, including a 6.0×104t/a sulfur recovery unit (including acid water stripping, solvent regeneration), 4 in-plant oily sewage pretreatment stations, 700 m3/h whole plant sewage treatment field and flares, etc.； The other part is the integrated refining and chemical facilities, including a 120 m3/h high-concentration salty sewage treatment device, a 1,400 m3/h plant-wide sewage reuse and treatment station, a 1,300 m3/h low-concentration salty sewage reuse and treatment station, a 2×500 m3/h rainwater reuse and treatment station, a 65,000 m3 plant-wide accident sewage storage tank, a 65,000 m3 plant-wide fire sewage storage tank, and a 100,000 m3 fire-fighting sewage storage tank. m3 The entire factory will be equipped with rainwater collection pools, environmental protection monitoring stations, greening, etc. The project's production sewage implements clean and sewage diversion, sewage diversion, quality separation treatment and wastewater reuse, so that its wastewater discharge indicators reach the domestic advanced level. In the design, measures such as above-ground sewage pipelines in the factory and groundwater anti-seepage were adopted, and oily sewage pretreatment facilities for production units and contaminated rainwater collection and improvement facilities were set up. The clean rainwater from the non-polluted area of ​​the factory is organized into the clean rainwater area of ​​the rainwater collection tank. After passing the automatic monitoring, it flows by gravity into the artificial lake and is discharged into the nearby Xiaoshi River. This post was last edited by johncom on 2009-4-14 08:16 ]

I don’t know what the water ingress indicators mentioned by the poster are, and what are the required water outlet indicators? If so, please upload it and give a detailed analysis and process. refer to.

Water ingress indicator: The cod is below 1500, the oil content is below 500, the water temperature is about 60 degrees Celsius, and the pH is between 7 and 9. Other indicators have not been analyzed, and it is estimated that the salt content is high. Water output index: COD is below 500 and oil content is below 100. This is what I think is a theoretical value. Please add to it, friends, because I don’t understand it either, hehe! ! !

These may be easy to remove. Oil is flotation, and a set of filtration and activated sludge biochemistry is enough. But the key lies in the level of your salt. It seems to be very high, but I don’t know how high it is? It is difficult to decide whether to use biochemistry, etc. Please make it clear.

There is currently no better process! Wuhan Petrochemical has a set of pretreatment equipment that uses two-stage cyclone oil removal technology (Technology of Petroleum University). It is understood that the effect is not ideal. I think there are two main reasons: 1. The water content in the extracted oil is high, and the range of uses of the oil is small. 2. The extracted oil is relatively easy to remove and has little significance.

Carry out oil removal first, cod is generally above 8000PPM, and pretreatment must be carried out