Coking oil drainage tank is full……
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When the coking oil stripping tank is full, if the liquid level reaches the vapor line of the tank, the oil will flow into the main oil and gas line of the coke tower. Will this cause a liquid obstruction in the vapor stream of the coke tower, thereby interrupting the feeding process for distillation? (It is not a process in which the vapor line from the oil stripping tank goes directly into the distillation tower; rather, it is a process in which the vapor line from the oil stripping tank is combined with the main oil and gas line of the coke tower.)
When the oil rejection tank is full, the oil released from it will flow through the vapor line of that tank and into the main oil-gas line of the coke tower (with a diameter of around DN500). The vapor entering the coke tower for distillation encounters very little liquid resistance, as the amount of oil released is small – about 10 tons per hour. This oil will be carried by the gas stream to the distillation tower, and it should not cause any interruption in the feeding process. I have never carried out this process; it’s purely my personal speculation.
The amount of oil that is discharged is relatively small, and the diameter of the oil-gas line is large; even if the oil discharge tank becomes full and oil overflows into the oil-gas line, a liquid seal should not form.
I also heard about it from others; I have never carried out this process. In our case, the gas phase from the oil tank is fed directly into the distillation tower, and I agree with the views of the two people who commented above.
We’re now reprocessing all the spilled oil; it would be easier if we could use the main oil and gas pipelines, haha. The diameter of the large oil and gas pipeline is φ630; even if there are components of oil that are separated at the inlet, they will be carried away by a large amount of oil and gas into the distillation tower, so there should be no problems. Since such problems have never occurred, it can only be considered a speculation. ——I wonder how the original poster came up with this question? This post was last edited by gmdyes on 2009-3-6 15:00]
What he meant was probably that during driving just now, the liquid level in the oil tank was high due to the cycling process of the engine. Due to the high oil temperature and large volume of circulating oil, the oil scavenge pump may sometimes become vacuumed, which could lead to an excessively high liquid level before switching the four-way valve. Similar problems occur under normal production conditions: the fluid in the large oil and gas line is in a gas-liquid mixture state, and it is possible for the oil stripping tank to reach boiling point during coking preheating. During the middle and later stages of preheating, the oil rejection tank is connected to the main oil and gas line, causing the pressure in the oil rejection tank to rise sharply. This results in the liquid flow within the main oil and gas line flowing directly into the bottom of the distillation tower, leading to a higher liquid level at the bottom of the distillation tower.