How can the steam used for pressure testing in coke towers be recycled?
Thread Content
The steam used for pressure testing in coke towers is usually released into the atmosphere through breather valves after the testing is completed; this is both wasteful and causes air pollution. Is there any effective improvement that can help save energy?
Yes, some use vent gas recovery
Was it mentioned on the 2nd floor about releasing and recovering vacuum? How is it recovered? It condenses into water once it reaches the vent tower; it’s not oil or gas anyway
How exactly is it done? We all just put them there directly
Steam after air removal is indeed a waste, but there is no good method for recycling it at the moment. When integrating into the vent cooling system, it is necessary to consider that the pressure relief time must not delay the processing time in the coke tower; moreover, the impact on the vent tower must also be taken into account, as this could pose safety risks. Additionally, it is important to ensure that the condensate formed after winter pressure testing is removed promptly, in order to prevent the accumulation of water and oil from causing sudden boiling and overpressure in the carbonization tower during preheating.
May I ask which refinery the original poster works at?
After the steam pressure test, water vapor turns into condensed water; only a small amount of low-humidity, low-pressure steam and non-condensable gases are released, which have no value nor need for recovery. Not much material is required for device pressure testing, and the cost of recovering such material is high.