Regeneration nitrogen from the reforming unit
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In the regenerated nitrogen system, why are hydrogen, hydrocarbons, and oxygen among the components monitored online for the nitrogen gas after leaching? Where is the source?
Control parameters for cold shutdown due to nitrogen pollution are used to prevent flash explosions caused by nitrogen pollution; issues with the pressure difference in the isolation system can pose a risk of air leakage.
Where do these pollution sources come from?
Hydrogen and hydrocarbons may be carried along due to incomplete hydrogen displacement by the catalyst, while oxygen may be present as an impurity in nitrogen!
One is carried by the reactor catalyst, and the other is whether the nitrogen to be replenished in the washing system is pure
Shouldn’t nitrogen theoretically have a purity of 99.99%, so that it contains very little oxygen? If a shutdown occurs due to too high levels of hydrogen, hydrocarbons, and oxygen, what aspects should be considered to identify the causes and find solutions?
The problems related to this nitrogen pollution mainly involve contamination of the nitrogen gas supply system, as well as issues with the isolation systems. It’s usually the former.
When the differential pressure of the hopper sealing air fluctuates significantly, it is easy for hydrogen- and hydrocarbon-containing gases to mix into the nitrogen being pumped