Operation of the absorption stabilization system—Pressure control method at the top of the stabilizer
Thread Content
Controlling the tower top pressure has a significant impact on both the C5 content in liquefied gas and the stability of the gasoline vapor pressure. Factors affecting it: (1) Increase in the outlet temperature of the bottom reboiler. (2) The parietal return flow increases, and the pressure rises. (3) The desorption efficiency of the desorption tower is poor, the feed composition to the tower becomes lighter, and the pressure rises. (4) The cooling efficiency of the tower top water cooler deteriorates, causing pressure to rise. (5) Failure of control instruments. Adjustment method: (1) Normal adjustment is carried out by controlling the cooling amount of the vapor and oil at the top of the stabilizer through the control valve of the bypass line of the water cooler for such vapor and oil, thereby regulating the pressure at the top of the stabilizer. (2) To stabilize the pressure in the stabilizer tower, its pressure should be adjusted to maintain stability. (3) Appropriately adjust the outlet temperature of the bottom reboiler. (4) If the instrument malfunctions, switch to manual control or wire-controlled operation; contact relevant personnel for handling.
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