How to remove nitrogen from recycled hydrogen
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The hydrogen we recover contains about 5% nitrogen; I would appreciate advice from those with expertise on methods and equipment to remove the nitrogen from it.
Just handle it in the way that’s appropriate for nitrogen
Just close the part covered with nitrogen at the front, that’s it
This will cost quite a bit of money; a replacement is needed. If possible, using a separation device would be quite simple. It just depends on whether the boss is willing to pay for it
First, we need to figure out where the nitrogen in this comes from. Under normal circumstances, nitrogen gas should not be present in the exhaust gases from reduction processes. If you don’t understand how this nitrogen appears, it might still show up again in the future, even after it has been dealt with now. The simplest solution is to carry out a major overhaul in advance, stopping the operation and using hydrogen to replace all exhaust gases. As for the cost, well!
Allow the system to release hydrogen with pressure relief from pressure swing adsorption into the exhaust treatment system. I don’t know if it will work or not
Reply to 6# Midnight 00:2010: I don’t quite understand. Could you explain it more clearly? The nitrogen in the hydrogen we recover is introduced through hydrotreatment, and detecting internal leaks is quite troublesome as well; it’s not easy to resolve.
Reply to 4# zhuangjz: Regarding the one on the 4th floor**, I would appreciate some guidance and support
Using pressure swing adsorption to remove nitrogen
Nitrogen can be removed through pressure- and temperature-dependent adsorption. We originally had this process in place here, but it ultimately failed; it was limited by theoretical constraints, haha. Generally, nitrogen is not generated in recovery systems, aside from leaks. So in essence, nitrogen can only come from the reduction workshop – the reduction furnaces aren’t cleaned properly, and the continuous cyclic operation of the system leads to an increasing amount of nitrogen (if adjustments aren’t made in time)
I agree with what was said above. There’s one more thing I’d like to ask: do you use nitrogen or a pump to hold down the material? If nitrogen is used, then nitrogen will definitely be present in the exhaust gases. Additionally, it is recommended to check whether there is any leakage in the nitrogen seal of the hydrogen compressor.