I have two questions regarding electrolyzers for everyone.
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The last edit to this post was made by sunjl1981 on 2013-1-6 at 23:43. I have a question for everyone: First question – regarding the circulation of the anode solution: Why does the brackish water coming out of the anode chamber in Asahi Kasei’s electrolyzers need to be partially recycled back into the electrolyzer? Why doesn’t the anode solution need to be circulated in the same Woody cell? The second issue: the circulation problem of the catholyte. What is the typical range in which the ratio of the catholyte circulation volume to the amount of finished alkaline solution is controlled? The cycling ratio varies among different manufacturers; what are the advantages and disadvantages of different ratio levels? ? # ， ， &
First question: In fact, electrolyzers can be divided into those with natural circulation and those with forced circulation. Different electrolyzers require different processing methods; Woody’s electrolyzers also have a circulation system, but it is of the natural circulation type. Second question: The circulation ratio needs to be determined based on the data provided by the manufacturer; different types of electrolytic cells require different circulation ratios.
Our company uses electrolyzers manufactured by Beihua Machinery. This is mainly because brackish water contains free chlorine that can protect the titanium tubes (the water pipes entering the tank are made of titanium). The amount of dilute brine returned to the electrolyzer is one seventh of the total amount of anolyte fed into the electrolyzer. Regardless of the DC voltage, the flow rate of the catholyte entering the tank is maintained at 43.2 cubic meters per hour. It’s just that the amount of pure water added to the catholyte in the tank is different.
Requirements for Asahi Kasei electrolyzers: The circulation rate of the catholyte is 0.03 cubic meters per cell
1. The so-called natural circulation and forced circulation probably do not refer to what the original poster meant; everyone can discuss what natural circulation and forced circulation are. Since we are talking about Asahi Kasei’s electrolyzers, their operating procedures explain that a certain amount of brackish water is introduced into the electrolyzer in order to protect the titanium tubes. Why is it necessary to protect these titanium tubes? It’s because hydrochloric acid needs to be added to their electrolyzers. 2. The difference in cathode circulation volume is due to the different cell designs and internal structures of the cathodes; it cannot be said that a certain current or area must result in a fixed circulation volume.
The so-called natural circulation and forced circulation probably don’t refer to what the original poster meant. Since it’s about Asahi Kasei’s electrolyzers, their operating procedures explain that a certain amount of brackish water is introduced into the electrolyzer in order to protect the titanium tubes. Why is it necessary to protect these titanium tubes? That’s because hydrochloric acid needs to be added to their electrolyzers, and adding acid directly would corrode the titanium tubes. The difference in cathode circulation volume is generally determined by the requirements of the cell area; of course, it is also closely related to the internal structure