Operation of the absorption stabilization system—Control methods for the top temperature of the stabilizer tower
Thread Content
The top temperature of the stabilizer is an important parameter for controlling the C5 content in liquefied gas. A higher temperature increases the C5 content in the liquefied gas, resulting in a decrease in gasoline production; on the other hand, too low a temperature increases the load on the tower and raises the vapor pressure of the gasoline. Factors affecting it: (1) An increase in the temperature of the reboiler at the bottom of the tower leads to an increase in the top temperature. (2) Changes in feed rate, feed composition, and feed temperature. (3) The temperature of the water cooler at the top of the tower rises after cooling, causing the top temperature to increase. (4) Stabilize the changes in tower top pressure. (5) Changes in the backflow rate at the top, changes in the top temperature. (6) Failure of control instruments. Adjustment method: (1) Appropriately adjust the reboiler and oil-gas return to column temperatures to ensure product quality. (2) Adjust the backflow rate and temperature after cooling. (3) Control the tower pressure and keep it stable. (4) Adjust the reboiler return temperature appropriately according to changes in feed and composition. (5) Switch the control instrument to manual mode and contact relevant parties for prompt handling.
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