The purity of tail chlorine suddenly decreased
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The purity of the liquefied tail chlorine has suddenly decreased, dropping from 85% in the previous shift to 65% in this shift. I would like to know what could be the reason for this Solve
This post was last edited by smartcatii on 2017-2-4 at 13:39. If analysis and sampling issues are excluded, there is a significant leak in some negative-pressure pipeline/gasket from the electrolysis unit to the inlet of the chlorine compressor, or the negative-pressure water seal has been broken (in certain processes). It is also possible that there is a leak inside the chlorine-to-nitrogen valve. Please conduct a thorough investigation.
A decrease in chlorine purity indicates that air or nitrogen has entered; please check.
Check the chlorine to hydrogen ratio to determine whether there is a leak in the electrolytic ion membrane; if the chlorine to hydrogen ratio is normal, then inspect all nitrogen sealing points to see if nitrogen is leaking in
The purity of the chlorine main pipeline is 98%; it is mainly supplied to the liquefaction unit, where the purity of the chlorine remaining after liquefaction drops suddenly to 68
Check the purity of the chlorine gas before it enters the liquefier; if the purity is 98%, the key issue is whether the production volume of liquid chlorine has increased. If it has increased, the liquefaction efficiency improves and the concentration of exhaust gases also decreases. Also, check whether there are any changes in the temperature of the chlorine gas entering the liquefier. A comprehensive analysis is needed, as there are many related factors that can be examined one by one.
It’s to have the laboratory test the hydrogen content in the residual chlorine; I’ve encountered situations where a high hydrogen content in chlorine led to its accumulation in the liquefier, resulting in a sudden increase in residual chlorine pressure
I basically agree with the opinion from Floor 6; check whether the temperature of liquid chlorine is too low. If so, reduce the flow rate of the refrigerant used in freezing the brine accordingly to avoid an excessively high liquefaction rate.
If negative pressure is used in the production process, it is necessary to check for any air ingress; furthermore, it should be verified whether the amount of residual chlorine used decreases and whether the liquefaction efficiency improves. Finally, check the electrolyzer. The best approach is to measure the chlorine purity as well as the oxygen and hydrogen contents in the main chlorine electrolysis pipeline, and also the chlorine purity and oxygen content at the liquefied elemental chlorine distribution station.
Has the number of users using tail chlorine decreased, and has the volume of liquefaction increased?