The vacuum tower is dehydrated and emulsified, turning white, which affects the analysis of iron ions!
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Our unit's ceiling reduction method uses 50kg/h of organic ammonia neutralizer, 1.7L/h of oil-melting corrosion inhibitor, and 1.2t/h of desalted water. The injection point is after the first-level pump and before the first-level cooler. At present, the decapitation temperature is controlled at 50-80°C, and dry vacuum distillation is used. The top cut water keeps emulsifying and turning white, please let me know the reason!
Let it settle for a while to see if there is any layering? Then do some analysis to see what the main components are?
The sedimentation and stratification are not obvious, and there is a thin layer of oil on top.
First, control the interface position, then adjust the corrosion inhibitor, and finally add the demulsifier.
There is no problem with the boundary position. The corrosion inhibitor is currently 1.7L/H. I think the amount is a bit large, but I dare not adjust it easily. Afraid of excessive iron ions. Add demulsifier to roof reduction system? Are there any additions from other brother units? Please share it,\ud83c\udf1d\ud83c\udf1d
It is very important to accurately judge the boundary position on site! It was the same here at the beginning. The key is related to the oil you process. Divide it into two pieces. If it is naphthenic oil, a demulsifier must be added. 3-5Ppm should be added before the oil and water are separated. For other oils, you can stop injecting the corrosion inhibitor for a short time to check the emulsification situation. Find the solution from the pharmaceutical manufacturer!
When the Ph drops below 7, remove all the emulsified water. I am afraid that the iron ions will exceed the standard and I will add more water. Just controlling the ph will be useless.
Daqing paraffin-based crude oil accounts for more than 60%, Russian oil accounts for 30%, and Hailar oil accounts for the remaining 10%.