Pressure testing issues in delayed coking coke towers
Thread Content
After the pressure testing of the new delayed coking tower is completed, it is necessary to remove the steam from inside the tower. Our company releases this steam directly into the atmosphere. I would like to ask whether this steam can be recovered; are there any other refineries that recover such steam? I look forward to hearing everyone’s opinions.
It must be difficult to recycle, right? First of all, the pressure is low, at around 0.25 MPa only, and there are requirements regarding the pressure release time. It cannot be too long, as this will affect the coking cycle.
It can be thought of this way: if the coke tower is new, the steam under pressure inside it can be used to purge the pipelines connected to the top outlet or bottom inlet of the tower; other than this function, it has basically no other purpose.
It’s okay to skip using the blowing line for now; just use it while releasing pressure. The rest are of no use; the quality of the steam is not guaranteed, and it’s difficult to recover it.
The quality of the steam is poor and the pressure is low; whether it is necessary to recycle it is still up for discussion!
We release pressure from it through the contact cooling tower, which allows for purging and venting to prevent oil deposition, as well as to avoid pollution being released into the atmosphere
As mentioned upstairs, it is connected to the vent tower for purging – so where does all that steam go? Moreover, the temperature of the steam is also high; it goes to the liquid separation tank at the top of the vent tower. Is it possible to cool down all of the steam?
What happens to the water generated in the vent tower from steam? If it becomes sulfur-containing wastewater, the cost of treating such water becomes even more impractical.
My idea is: 1. Changing the steam pressure from 1.0 Mpa to 0.45 Mpa can save 10 energy reduction factors； 2. Supply steam slowly and release pressure gradually; use the heat from steam to heat the coke tower, thereby reducing losses associated with preheating oil and gas ；