Phenomenon when the synthesis tower is full

When the poster said "the synthesis tower is full", does he mean that the gas phase space is full than the urine tower? The discharge port of the urine tower is inserted about 800MM into the urine tower to ensure that there is a certain buffer space in the urine tower. Generally speaking, it will not be full of the discharge pipe opening. When there are other accidents, it will appear as overpressure in the urine tower. When driving and discharging materials quickly, the following phenomena generally occur: 1. The temperature at the top of the urine tower will suddenly rise. 2. The pressure rises suddenly. 3. There will be an inflection point of decreasing temperature. 4. The liquid level appears in the first tower. 5. The temperature at the bottom of the absorption tower rises. This post was last edited by qiwu9981 on 2009-3-9 10:12 ]

The author's synthesis tower is full. Is this a phenomenon of overpressure in the synthesis tower? Causes and treatment of overpressure in synthesis tower : (1) CO2 concentration decreases: Due to the increase in inert gas in the outlet material, the volume flow rate increases, and the flow rate through the PV204 valve increases. If the regulating valve is in manual control, the pressure of the synthesis tower will rise. In the automatic control state, the regulating valve will open significantly. If the temperature of the synthesis tower also drops, it can be judged that the CO2 purity decreases and causes the pressure to rise. The purity of CO2 should be improved. If it cannot be lifted for a while, the production load should be reduced. (2) Improper operation when reversing the compressor and pump will also cause the pressure to rise. Therefore, when reversing, be sure to pay attention to the amount of material entering the tower and the opening of the pressure regulating valve of the synthesis tower. (3) Problems with the pressure regulating valve system will also cause the pressure of the synthesis tower to rise linearly. Problems with the regulating valve system generally include: Ⅰ The pressure point is blocked Ⅱ The gas source of the regulating valve and pressure transmitter is cut off (air opens the valve) Ⅲ The regulating valve is stuck. The above reasons will cause false indications, and the actual pressure of the synthesis tower will rise. The cause should be eliminated in time, and emergency shutdown should be taken if necessary (when the outlet pressure of the compressor and pump room rises). (4) The air source pressure of the valve positioner is insufficient, and the pressure input to the diaphragm chamber of the regulating valve is insufficient, causing the valve opening to be insufficient. When the load is large, it is easy to cause overpressure. (5) When driving after a short period of parking, if the discharge pipe is blocked, the pressure of the synthesis tower will rise linearly, and emergency shutdown must be carried out. (6) The pressure point is in front of the check valve of the ammonia inlet tower pipe (according to the direction of material inflow). Once the ammonia pump trips, the outlet pressure regulating valve in the automatic control state will be closed quickly. At this time, the A pump and the carbon dioxide compressor are still feeding into the tower, so the pressure in the tower rises rapidly. At this time, the pressure regulating valve should be changed from automatic control to manual control immediately, and a certain opening should be maintained to maintain the pressure in the synthesis tower. (7) The PV204 valve guide sleeve is broken. After the guide sleeve is broken, the debris blocks the outlet of the regulating valve, causing the pressure of the synthesis tower to rise. At this time, it is generally only possible to maintain a low production load and it becomes more difficult to increase it after the load is reduced. After accurate judgment, the tower should be cut off for inspection and processing (replacement of the regulating valve) in time.