What is the reason for the high hydrogen content in tail chlorine?
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This post was last edited by sunjl1981 on 2013-1-6 23:44. Our factory has a diaphragm production process with an annual output of 18,000 tons of caustic soda. Recently, due to a sudden increase in electrolyte concentration, we stopped to wash the tank for nearly three hours out of patience. After starting the operation, the chlorine and hydrogen content in the main pipe was not too high, but there has been a trend of increasing tail chlorine hydrogen content recently. Please give me some advice! Thank you! # , , &
The washing tank will cause damage to the diaphragm, resulting in a decrease in the operating efficiency of the diaphragm!
Too much acid is used to wash the tank, which damages the diaphragm. Or the liquid level drops too low and damages the diaphragm. It is recommended to check hydrogen content.
There are several main reasons for high chlorine and hydrogen content:: 1． Asbestos wool is of poor quality. 2. The cathode is blocked. 3. The anode liquid level is too low. 4. The diaphragm is too thin or damaged. 5. The pressure of chlorine and hydrogen fluctuates greatly. 6. The current changes too frequently. According to your situation, it is probably because the washing tank diaphragm is damaged or the current changes too frequently during the driving process, resulting in large fluctuations in chlorine and hydrogen pressure.
Is it the tail gas after liquefied chlorine? The hydrogen content in the main pipe of the ion membrane device in our factory is 0.021%, and the hydrogen content in the exhaust gas is 0.2%. This is because after the chlorine gas is liquefied, the hydrogen gas does not liquefy and the concentration becomes larger. The above situation is for reference only.
First, the diaphragm was damaged after washing the tank, causing the hydrogen content of the original chlorine to be high; second, the liquefaction efficiency of chlorine may have been controlled too high recently.