What is the general maximum allowable water content in coking feed oil?
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As the title says! If a fractionating tower overflows due to water in the feed oil, how should such an incident be handled?
If the distillation column is overfilled due to water in the feed oil, the reason is severe water content in the feed system; poor dehydration in the upstream units leads to the presence of water during tank switching. Treatment: Contact the dispatch team to determine the cause. Operators should monitor the screens more closely, keep track of the liquid level in the feed tanks before water appears, and adjust the amount of fluid drawn off to prevent the pumps from running dry. Depending on the situation, operators should close the valves supplying feed to the unit and increase the circulation ratio to reduce system pressure. Please share your insights!
1. Appropriately reduce the processing volume and appropriately increase the radiation dose 2. Contact the tank farm to dehydrate the feed tanks, and adjust the operation of the distillation tower promptly. 3. Strengthen the inspection of the appearance of gasoline and diesel; promptly divert them to the lightly contaminated oil line, and divert paraffin oil to the heavily contaminated oil line.
1. Reduce the processing volume appropriately and increase the radiation level accordingly. When water is present in the crude oil flowing through the tower, the liquid level and temperature at the bottom of the distillation tower drop rapidly. If the radiation level is increased, the thermal load on the furnace becomes very high, and the temperature at the furnace outlet also drops quickly. As a result, the amount of oil and gas entering the coking tower decreases rapidly, leading to a vicious cycle in which there isn’t enough heat for distillation. Personally, I think what you said isn’t quite right
It is essential to enhance dehydration and increase the circulation ratio
Switch coking feedstock to direct supply, add feedstock buffer tank
I would like to ask why, if the raw material contains water, it is necessary to increase the temperature in the evaporation section?