Theoretical knowledge of delayed coking-----Can anyone provide some?

1. Coking removal: Hydraulic coking removal equipment is available in both jacketed and jacketless types; this device uses the jacketed hydraulic coking removal method. The coking removal process is controlled by a program. The principle of hydraulic coking removal involves using the kinetic energy generated by high-pressure water jets to break up the coke inside the coke tower, causing it to separate from the tower walls and fall out due to its own weight. High-pressure water flows from the high-level water tank, passes through a filter, and enters the high-pressure water pump. From there, it is pumped out and sent to the coking removal control valve. The outlet has two paths: one path sends the water in a loop back to the high-level water tank, while the other path leads the water through high-pressure pipes to the operating platform at the top of the tower. From there, it splits into two branches that extend, via high-pressure hoses, along the coke tower structure to the operating platforms at the top of the drill towers, where it connects to drill rods, pneumatic faucets, and water turbine reducers. Finally, an automatic switching mechanism is used to create a high-pressure water jet for drilling and removing coke. The rotation of the drilling tool is driven by a water turbine or an air motor, while the lifting and lowering of the drilling tool are achieved by the drill rig winch winding and unwinding steel cables. During the coking removal process, coke and water fall simultaneously, passing through the protective tube of the bottom cover loading/unloading machine to flow into the coke storage tank via the inclined chute at the bottom of the tower. After filtration, the water enters a sedimentation tank where it undergoes processes such as sedimentation and cooling before being reused as desulfurization water. 2. Bleeding: 1) Supplying a small amount of steam to drive off oil and gas: After tower replacement, supply steam to the old tower for 40 minutes to drive the oil and gas from it into the distillation tower. (2) Gradually close the outlet valve of the 14-meter old tower to ensure that the pressure in the old tower is higher than that in the new tower; be careful not to allow the pressure in the old tower to rise too quickly, allowing at least 15 minutes for this process. (3) When the outlet valve is about to close completely, immediately open the vent valve for venting, and then close the outlet valve tightly. 2) Large-scale steam cooling of coke: (1) After venting the old tower, immediately close the 10-meter isolation ball valve of the old tower; blow steam into the pipe 1 inch before shutting off the isolation ball valve. Blow large amounts of steam towards the old tower from 10 meters away; be careful to do so slowly, ensuring that the pressure at the top of the tower does not exceed 0.24 MPa, and take strict precautions to avoid overpressure. (2) When the top temperature of the tower drops below 330°C, stop the large-scale steam injection and start cooling the coke with water.

By \"blowing for venting,\" it mainly refers to blowing air into the vent tower; the air in the vent tower then accumulates, and afterward it is used for distillation and reprocessing. . .

Coking removal is handled by a dedicated team; I’m not too familiar with that, but all I know is about hydraulic coking removal. Regarding the purging process, it involves first carrying out a minor purge after cutting off the flow; at this stage, the oil and gas proceed to the distillation tower, which takes about 40 minutes to an hour. After that, a major purge is carried out – we use a 11-meter system for the major purge, while a 18-meter system is used for purging purposes. Let the oil and gas follow the steam drive to the air defense tower, as there is very little oil and gas in the steam at this point; sending it to the distillation tower would affect its operation! (This is a newcomer’s understanding; I hope those with more experience can point out any mistakes.)

The de-fouling team is a good place; it’s generally difficult to get into, but for newcomers, there’s no place that’s better. Actually, the technical complexity of the defocusing team isn’t very high; you can understand what’s going on by just observing. I don’t understand what you mean by \"11 meters of inflation\" and \"18 meters of deflation\"