Impact of temperature changes in the atmospheric pressure column
Thread Content
For example, the original properties may become lighter or heavier, or there may be water present; how do these factors affect the temperature at the top of the tower, and how should the temperature be adjusted? I would appreciate it if the experts could explain this in more detail. Thank you.
@Lanliu Tongyin @2887848 @TaoshengYizhou8228 has come to clean up the mess. . .
Causes, phenomena, and treatment of water in crude oil? Reason: 1. The water in the crude oil tank was not removed thoroughly or at all, resulting in an excessive water content. 2. Excessive water volume in electro-dejection or a high water level in the electro-dejection tank causes a trip. 3. Changes in the properties of crude oil lead to severe emulsification, poor electrodesorption efficiency, and water inclusion in the crude oil emulsion. 4. High mixing strength, with the crude oil emulsion containing water. Phenomenon: 1. Tripping due to electrical discharge. 2. The pressure at the top of the initial distillation tower increases, the oil-water level in the reflux tank rises, and the amount of water removed increases. 3. The top temperature of the initial distillation tower rises, and the dry points at the tower top and side streams increase due to foam entrainment. 4. The pressure in the crude oil heat exchange system increases, the amount of crude oil decreases, and the temperature after heat exchange drops. 5. When there is excessive water, the heat exchanger experiences pressure buildup and leaks; the primary tower is overfilled, the safety valve trips, and the pump at the bottom of the tower loses its vacuum. Treatment: Slight water content: 1. Reduce the amount of crude oil and switch to another crude oil tank. 2. Adjust the electrodeposition operation by increasing water removal and lowering the liquid level; if the emulsion layer is too thick, remove it, then supply power to maintain normal electrodeposition operation. 3. Slightly increase the top temperature of the tower to allow moisture to emerge from the top; pay attention to the level in the reflux tank, increase water separation, and take strict precautions to prevent water from being carried back in the reflux stream. 4. Reduce or shut off the steam injection at the bottom of the tower as appropriate. Severe water carryover: 1. The volume of crude oil supplied decreases significantly; the crude oil tank is changed, the furnace cools down and shuts down, circulation mode is switched to, and steam injection at the bottoms of all towers is stopped. 2. Stop water injection for electrodeposition, increase water cutting; if emulsification occurs, remove the emulsified layer. 3. Slightly increase the top temperature of the tower to allow moisture to emerge from the top; pay attention to the level in the reflux tank, increase water separation, and take strict precautions to prevent water from being carried back in the reflux stream. 4. Check the color of the side-line oil, and improve the sludge tank as necessary. 5. Closely monitor the heat exchanger for leaks to ensure that temperatures and pressures do not exceed safe levels. 6. Once the crude oil improves, resume production.