Delayed coking sludge reprocessing
Thread Content
After stopping the recycle of slag, the pressure at the top of the coke tower increases; sometimes it rises from 0.25 to 0.33 Mpa. What could be the reason for this, experts?
During the last hour of full steam generation, stop feeding water
The pressure here must be really high then; we’ll supply water, and it will take half an hour to an hour for the reprocessing to be completed
After water is supplied, the top temperature drops too quickly
We carry out pre-refining with a small amount of water supply, usually for about 20 minutes, and then add more water. Perhaps the temperature did not drop when feeding the scum, and rapid vaporization occurred during high water supply, causing the pressure to rise quickly.
The main purpose of the forced purge is to remove the unreacted oil and gas from the coke, thereby reducing its volatile content. Since the heat in the tower has not yet been completely dissipated, it is as if 40 tons of steam have entered the coke tower, resulting in high pressure inside it. It is recommended to introduce sludge after 2 hours of forced purging; the process of reprocessing this sludge should be stopped once the temperature in the middle part of the tower drops below 300°C. The oil content in the sludge should also be analyzed. The data on coke volatiles in the observation tower is used as a reference for the recycling of slag
Does the term \"scum\" mentioned by the experts refer to that in wastewater treatment plants?