What should you pay attention to after replacing the nitrogen in the system before driving?
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This post was last edited by sunjl1981 on 2013-1-6 23:27. After replacement, pressure maintenance is required. How to operate. Need to close all valves? Do I need to continue to add nitrogen? Please provide some opinions. # , , &
After the system nitrogen replacement is qualified before starting, the nitrogen should be continued to be introduced until starting, and then the nitrogen amount should be slowly reduced.
1. Need to continue to circulate nitrogen； 2. The nitrogen filling valve can be adjusted according to the suction gauge. ； 3. All valves are closed when maintaining pressure.
Continue to fill with nitrogen to maintain pressure, and be careful not to leave any dead ends in the hydrogen pipeline to prevent unnecessary consequences.
Is it necessary to conduct air tightness testing? Are there any parts that may leak?
The most important thing is to ensure that the oxygen content analysis at each point is qualified.
After the system nitrogen replacement is qualified before starting, the nitrogen should be continued until starting, and then slowly reduce the nitrogen flow (we usually set it at 3,000) and turn off the rising current to 5,000. Replace and vent some pipelines for hydrogen treatment.
No way? Have you ever done a pressure test and leak test before driving? Just keep the pressure positive and that'll be fine. The above is just my personal opinion. This post was last edited by nnza on 2008-3-6 15:48 ]
There is no need to conduct an air tightness test because the hydrogen system is a positive pressure system, so there is no need to conduct an air tightness test.
This is how we replace the hydrogen system during startup. First, the cell starts to replace with nitrogen after the liquid is injected. Both the cathode and the anode chambers are replaced. When the current reaches 0.5KA, the nitrogen replacement in the catholyte chamber is stopped, and the anode chamber is replaced until the current is 2.4KA! The hydrogen treatment system at the rear begins to replace nitrogen before starting the vehicle. One side is replaced forward from the distribution table, and the other side is replaced backward from behind the regulating valve. The hydrogen in the hydrogen main pipe is evacuated, and then continuous sampling is performed to analyze the oxygen content in the hydrogen. When the oxygen content in the hydrogen is less than 0.5, it is merged into the large system!