Why are the voltages at both ends of the polarization current slot higher than that in the middle?
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 at 23:03. In chlor-alkali plants, polarizing current is applied during startup and shutdown to keep the cell voltage between 1.6–1.8 V. Why is the voltage across the cells at the ends higher than that in the middle? Is it due to higher resistance at those ends, or because they are further away from the neutral point of the current? Please share your opinions. # hcbbs
This post was last edited by yzhms on 2009-10-21 at 17:38. Are you referring to the terminal frame? If so, it’s normal – the voltage in the terminal frame slot is usually high. Could you tell me what the current and voltage are when polarization is applied? How many slots?
To the friend on the 2nd floor: First of all, thank you for your reply. What I’m referring to are the cell slots near the end frames. During normal production, the voltage in the slots at the end frames is basically the same as that in the other slots; it’s not higher than the voltages in those other slots. Under polarizing current, the voltage in the slots at the end frames is the highest, and it decreases as one moves towards the center, with the decrease being most noticeable in the earlier slots. Additionally, the magnitude of the polarizing current is adjusted according to changes in slot temperature; the voltage in the slots varies depending on the polarizing current applied, and it’s also related to the number of slot cells. We use 81 slot cells, but why does this phenomenon occur? Please share your thoughts actively
During normal operation, the voltage at both ends is also slightly higher. This is particularly evident in the later stages of operation.
High current, low deviation； The current is low, and the deviation is large.
At both ends of the electrolyzer, the thickness of the gaskets is greater than that of the gaskets in the middle. As the electrode spacing increases, the voltage becomes higher.