When cutting the four-way valve, the reaction position, the fractionation position, and the absorption stabilization position must cooperate.

response position: 1. Properly increase the temperature at the top of the new tower and the temperature at the outlet of the heating furnace to ensure the quantity and temperature of the coked oil and gas going to the fractionation tower.: 1. Appropriately reduce the upper feed amount of raw oil and increase the lower feed amount appropriately to ensure the temperature of the evaporation section. 2. Appropriately adjust the amount of wax oil returned to the tower to ensure the temperature of the upper section of the fractionation tower. 3. Appropriately adjust the temperature and amount of diesel oil returned to the tower to ensure that the diesel quality is qualified. 4. Appropriately adjust the speed of the rich gas compressor and the amount of reverse vibration to ensure that the pressure of the fractionation tower and the pressure of the coke tower are absorbed and stabilized.: 1. Open the non-condensable gas valve appropriately to ensure the fuel gas consumption of the heating furnace. 2. Turn on the manual pressure control of the reabsorption tower to ensure stable fuel gas.

If there is no rush to start the operation, it is recommended that the absorption stabilization is not rushed and the operation is adjusted slowly. After the coking reaction and fractionation station operations are relatively stable, the absorption stabilization can be started slowly.

1. The impact of the new tower on fractionation and absorption stability begins to appear 10 minutes after cutting the four-way. In particular, the small steam feed of the old tower has the greatest impact on fractionation, and the temperature of the entire fractionation tower drops; the oil and gas contain a large amount of steam, which will evaporate a large amount of wax oil components. The gas phase load of the fractionation tower is large in a short time, and the fractionation tower is in danger of tower flushing. The water volume in the reflux tank at the top of the fractionation tower increases, and the interface level rises~~~~~~ Therefore, the fractionation position should adjust the amount of wax oil out of the device.； Adjust the amount of acidic water out of the device to avoid the impact of water in crude gasoline on the operation of the stabilizing system. 2. After the four-way cut is completed, the stabilizing heat source is often insufficient, and the amount of rich gas will also be reduced. Therefore, in stable positions, the supplemental absorbed dose should be appropriately reduced. ； Appropriately increase the bottom temperature of the desorption tower to increase the amount of desorbed gas

It must be a coking device. The title is unknown, so I mistakenly thought it was a catalysis device.

increase a little: A coke tower diesel pressure compensation line can be added to the reaction station to reduce pressure fluctuations when switching four-way and increase the amount of fractionated gas phase.