Where does the oil in the oil-water separation tank of the delayed coking vent tower come from?
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This post was last edited by lyhgchem on 2011-5-17 at 18:19. The wastewater in the oil-water separation tank of the delayed coking vent tower is severely emulsified – where does the oil come from? Is it light oil or heavy oil? Could you write down the process from the top of the vent tower to the oil-water separation tank? What materials are mainly fed into the vent tower?
Reply 1# lyhgchem: Under normal conditions, the vent tower accepts oil and gas from the large blowdown in the coke tower in order to cool and recover the oil contained therein. Under accident conditions, they receive oil and gas from the heating furnace and coke tower; some units also recycle the contaminated oil within the unit through a vent tower to produce quench oil in order to improve efficiency. The oil and gas at the top of the vent tower is cooled by air-cooled water before entering the oil-water separation tank; the contaminated oil is removed from the plant, while the wastewater is sent to the sulfur tank or the cold coker water tank.
Should the vent tower handle the oil and gas during large-scale steam injection in an intermittent manner? For a plant with a capacity of 1 million tons, how much sulfur-containing wastewater can the vent tower produce per day? What type of oil is mainly present in the oil and gas emitted during large-scale steam injection in the coke tower? Is it relatively heavier than the oil vapor emitted when blowing gently?
The wastewater from the oil-water separation tank at the top of the vent tower comes in after the coke tower was converted to a vent system; it contains some light oil and heavy oil. It is difficult to achieve thorough oil-water separation in a tank. This portion of water can be pumped into the cold coke water sedimentation tank, and the oil can be separated using a cyclone oil remover before being sent to a separate cold coke water sedimentation tank. Then, the light oil is overflowed into the sludge tank to be reused as quench oil for reprocessing. Transfer of heavy oil to the cold coking water tank; oil is removed from the bottom of the tank on a daily basis.
That’s exactly how our device works: as long as the overflow and oil cut-off occur on time, the quality of the cold coking water remains satisfactory. It’s that employees sometimes slack off, so supervision is necessary
I think a coking unit is something that can handle dirty substances. Scum. Sooty oil. Our factory is thinking of installing one for us; to put it simply, it’s just a trash bin
We no longer use the cyclone oil separation method in the cold coke water tank; its performance is not good enough. The old process has been abandoned. Now, the oil goes directly into the dirty oil tank, where it is then reprocessed to produce quenched oil