Reasons for increased pressure in the distillation tower

1. Instrumentation issues, failure of sensors 2. Backroad-related problems 3. Response issues 4. Equipment problems, etc

1. Excessively high reaction pressure 2. Compressor failure 3. Incorrect instrument readings 4. Excessive steam at the bottom of the tower 5. Poor cooling effect at the top of the distillation tower

1. Incorrect instrument readings. 2. High flow rate from the upstream side: raw materials, reaction depth. 3. Operational issues. 4. High pressure on the downstream side, blockages, or problems with the compressor control, etc

Factors affecting it: (1) Changes in the operation of the reaction system; excessive compression of rich gas by the compressor leads to an increase in the amount supplied to T2201, causing the pressure in the distillation tower to rise. (2) The oil-gas butterfly valve at the distillation tower outlet failed. (3) Air compressor failure. (4) The rich gas flare system contains a large amount of condensed oil. (5) The liquid level in V2203 is too high. (6) Failure of the air-cooling fan or motor results in poor cooling performance due to air cooling. (7) Changes in the cold return at the top of the tower or water in the return stream. (8) Changes in the load of the distillation tower (changes in top circulation, mid-stage reflux, internal reflux, steam injection volume, etc.). (9) Excessively fast oil feeding rate or vacuum conditions at the liquid level, allowing gas to enter. (10) Too rapid pressure relief in V2303, resulting in large amounts of non-condensable gas entering V2203. Adjustment methods: (1) Coordinate with the reaction unit to adjust operations and reduce the amount of compressed rich gas fed to T2201. (2) Contact the reaction unit staff to open the outlet butterfly valve. (3) When the compressor is shut down, use rich gas venting to control the pressure in the fractionation tower. (4) Reaction response: At the compressor station, open the pressure control valve at the compressor inlet, as well as the bypass and related shut-off valves, to remove any condensed oil from the rich gas system. (5) Adjust the level of stabilizer V2203. (6) Quickly adjust the angle of the air-cooling fans and the amount of cooling water to reduce the load on the fractionation tower; adjust the cold reflux, top circulation, intermediate reflux, and tower return temperatures; and carry out repairs on the motors and fans of the air coolers. (7) Cut off water at V2203 and adjust the stable cooling return flow rate. (8) Adjust the parameters such as temperature, flow rate, and liquid level in various sections of the fractional distillation tower to normal levels. (9) Press the oil slowly; do not let the liquid level become empty. (10) Ensure stable and smooth pressure relief