Regarding whether the transfer of driving alkali poses safety risks
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This post was last edited by sunjl1981 on 2013-1-7 00:26. May I ask whether the caustic used for driving the vehicle for the first time is added to the caustic circulation tank before starting the vehicle, or is it added from another tank? If it is added through another slot, how can we ensure that air is not drawn into the cathode system that has already been purged? Thank you. This post was last edited by yzhms on 2009-4-18 23:01 ] # hcbbs
The driving base is transported into the electrolyzer from D-330
If the circulation tank is large enough, it can be added directly from the circulation tank； Generally, due to the small volume of the circulation tank, a dedicated alkali tank for startup is required.
During the filling of the electrolyzer, nitrogen is continuously supplied to the system; after all the liquid has been poured in, polarization is applied to conduct oxygen analysis in both the electrolyzer and the system’s nitrogen, and once the results are satisfactory, the system’s temperature is increased.
Either method works. In terms of the process, the typical alkali circulation path is from the finished alkali storage tank to the high-level tank; from there, the alkali flows through a bypass around the electrolyzer into the alkali circulation tank, and then returns to the circulation tank, or it may go directly back to the high-level tank. It forms a loop. Typical finished-product alkali storage tanks are equipped with alkali pipelines that lead directly to the electrolyzer. So it is possible to go directly from the finished product tank to the electrolyzer, or from the high-level tank to the electrolyzer. During filling, there is a nitrogen seal at the tail of the tank to remove the gas from inside it, so it doesn’t matter how it’s done. It is essential to pay attention to the temperature issue.
Isn’t the low-level tank of the catholyte protected by nitrogen? When alkali is introduced, the liquid enters and nitrogen is displaced.
Generally, adding it to the circulation tank or startup tank is no problem. During liquid filling, nitrogen is used for sealing at the cathode end of the electrolyzer to remove gases from the tank; moreover, when a pump is used to add alkali, no large amount of air is introduced.
When starting up the system, if the liquid is to be poured into the electrolyzer from the finished alkali tank, should the liquid levels in the circulation tank and the high-level tank be increased first? This would be beneficial for proper circulation. Additionally, for safety reasons, the cathode circulation system is usually sealed; therefore, as long as there are no issues with the equipment, filling the cathode system with nitrogen should not pose any problems~