What is the purpose of the waste steam line of the overhead cooler in the delayed coking vent tower? Urgent! ! ! !
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As the title suggests, I earnestly request that all experts answer as soon as possible~~~
It should be determined by how severe the foaming phenomenon is. It’s abnormal if it exceeds that.
I’m sorry; maybe I didn’t explain it clearly. The waste steam comes from various steam-using points in the plant and goes to the air cooler. I think this pipeline might be used for purging, warming up the lines, or removing coke, etc. Am I correct? Please give me some advice.
The effect of flushing coke dust and preventing salt formation: Ammonium salts dissolve in water to prevent blockages. The air-cooling tubes in the vent tower are prone to getting blocked, so they need to be checked regularly during cold coke handling and cleared promptly
Due to the intermittent operation of the air cooling at the top of the vent tower, freezing is prevented and heat mixing is achieved.
Just receive at the entrance? Or through the entire air cooler? , if it’s only at the inlet, then it’s for purging ； Air cooling results in heat tracing.
It depends on where the steam pipeline is connected; generally, there is purge steam and heat tracing steam at the inlet to the overhead cooler of the vent tower.
This post was last edited by Bai Ding on 2010-9-6 at 22:24. Additional note: 1. Cool the waste steam; otherwise, the steam reciprocating pump cannot operate properly. 2 There has to be a destination for the gas phase in the condensate expansion tank. Air cooling of the vent tower is just right.
The steam reciprocating pump is not needed during normal production; it is only used in emergency situations or when starting up or shutting down the plant. It is used for 4.5 days per year, so this amount of steam can be disregarded.
Did you not remove the oil pump upstairs? It’s used every day; the waste steam is used to clean the tube bundles. The on-site air exhaust pump can also operate, but we want to use the waste steam to clean the tube bundles as well
Personally, I think it mainly serves a cooling and gas-venting function. The pressure of the waste steam in our plant is around 0.5 MPa, while the pressure at the top of the vent tower during large-scale steam injection and coke cooling is between 0.7 and 0.9 MPa. Under such conditions, the waste steam cannot enter the air-cooling inlet. Even outside these periods, the air cooling at the top of the vent tower is sufficient to cool the waste steam to the temperature of cooling water, so its effect on flushing the pipelines is minimal! !