Can the addition of acid to the electrolyzer be stopped? How long can it generally be stopped?
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Can the addition of acid to the electrolyzer be stopped? How long can it generally be stopped? What is the impact of stopping the addition of acid on the electrolyzer, and does it affect the ion membrane?
The purpose of adding acid is mainly to neutralize hydroxide ions, reduce side reactions in the anode chamber, thereby lowering the oxygen content in chlorine and improving its purity； If the downstream products have no strict requirements regarding the oxygen content in chlorine, it is possible to pause operations for a while; however, this will have some impact on subsequent liquefaction processes. The impact on ion exchange membranes will not be significant! This is just my humble analysis; I hope professionals can correct it!
It depends on what type of cell you have; generally, adding acid allows for a long period of shutdown, but BiTAC cells used in chlorine production cannot be shut down. If shutdown is necessary, it can operate at reduced load.
Can the chlorine engineering N-BiTAC cell be stopped? Why?
The acid addition to the electrolyzer can be stopped; after stopping the acid addition, there are more side reactions, the purity of chlorine is lower, and the pressure required for liquefaction increases. Different processes simply stop adding acid in different ways.
It is possible to stop adding acid to the electrolyzer, but in order to suppress side reactions within it, it is best not to do so, as the by-product chlorate causes corrosion to the electrode mesh and coating, reducing their lifespan and ultimately leading to a decrease in electrical efficiency over time. Stopping the addition of acid at the same time will reduce the quality of the alkali, while adding acid reduces the accumulation of impurities on the surface of the ion exchange membrane, thereby extending its service life.
By operating the chlorate decomposition system over a long period to ensure that the chlorate levels in the output fluid remain within the specified limits, it becomes possible to stop adding acid to the electrolyzer.
Stopping the process increases the free chlorine in the brine; more sodium sulfite has to be added for brine treatment, which raises the sulfate level in the system. It increases the formation of positive side reactions, raises the oxygen content in chlorine, increases the pressure in the liquid chlorine system, and elevates the reaction temperature in the synthesis furnace