Feed water to the steam drum
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May I ask, when using backfeed medium-pressure steam to preheat the feed material, is it okay if no water is supplied to the medium-pressure steam drum?
Whether water is supplied to the drum, I don’t think it has anything to do with preheating the feed material. Water is supplied probably because the temperature outside the furnace tubes has risen now, and it’s necessary to supply water in order to protect those furnace tubes.
When starting up our catalytic unit to preheat the feedstock, we need to introduce steam into the drum and vent it on-site in order to raise the temperature of the feedstock; at this time, no water is added to the drum, and due to the low water temperature, the preheating temperature of the feedstock cannot be increased
Catalyze? Isn’t this about preheating the two devices in advance? If the temperature of the steam drum rises, water will be added, right? With steam, preheating the oil takes no time at all; all that’s needed is to ensure the feed reaches the desired temperature
In reverse steam injection for preheating the feedstock, the drum used for preheating cannot be filled with water; steam is passed through it instead.
The node where medium-pressure steam is used to heat the feedstock occurs when the crude oil starts to enter the three-loop cycle outside the tower; it is medium-pressure steam that is used for heating, definitely not deoxygenated water. The condensation at the outlet of the heat exchanger is used to control the rate of temperature increase of the feedstock oil； At the same time, establish a circulation system for low-temperature hot water to control the outlet temperature.