Regarding the primary chlorine pressure

It is usually caused by subsequent factors; check the chlorine liquid production process as well as the usage of chlorine by various units.

Analyze whether there are any changes in the purity of the original chlorine and the purity of the residual chlorine, as well as whether there are any changes in the liquefaction efficiency

Hello, OP: Before answering your question, I would like to raise an issue with the way you phrased it – such a formulation isn’t clear at first glance. When asking questions in future forums, the following three points should be kept in mind: 1. Provide the background of the issue (what device is it?) What products to produce? What is the process route? etc. – clarify it ； 2. To identify the symptoms of the problem (under what circumstances do these symptoms occur?) What are the specific manifestations of this symptom? etc.) Explain clearly ； 3. It’s better to have personal analytical perspectives? Only by clarifying the above three points can netizens more easily analyze the problem and propose corresponding countermeasures. Regarding your question, I have roughly understood its meaning from the wording: 1. It is a liquid chlorine production facility, and its exhaust gas is used to produce synthetic hydrochloric acid ； 2. The symptom is an increase in primary chlorine pressure (which also leads to an increase in exhaust gas pressure) ； 3. The external conditions of the liquid chlorine production plant (the flow rate of liquid chlorine exhaust gas used in hydrochloric acid production) have not changed ； 4. It is necessary to seek the reasons from forum users ； According to the question, to determine the cause of the increase in raw chlorine pressure, analysis should be conducted from the following three aspects: 1. The direct cause of the increase in raw chlorine pressure is an imbalance between the production and consumption of chlorine gas (the amount of chlorine gas produced is greater than the amount consumed). There are two possibilities (the way to determine this is by checking whether the electrolysis current changes at the same moment as the abnormal condition occurs): A. It is possible that the \"chlorine consumption\" remains unchanged while the \"chlorine production\" increases; B. It is possible that the \"chlorine production\" remains unchanged while the \"chlorine consumption\" decreases ； 2. If the aforementioned issue is a reduction in \"chlorine consumption,\" it is necessary to analyze whether there were any changes in the amount of chlorine used by various chlorine-consuming components within the entire \"chlorine system\" (other than liquid chlorine) at the same time of the abnormal condition. If the amount of chlorine used (other than liquid chlorine) in the \"chlorine system\" remains unchanged, the problem is due to a decrease in the production capacity of the liquid chlorine manufacturing facility ； 3. If it is confirmed that the decrease in capacity of the liquid chlorine production unit is caused by this issue, the following actions must be taken (due to space constraints, I will only analyze the reasons; the methods for resolving the problem should be determined by the user himself): A. Analyze the purity of the raw chlorine; if its purity is low, it will affect the capacity of the liquid chlorine production unit ； B. If the purity of the original chlorine is normal, then it is necessary to analyze the purity of the exhaust gas; if the purity of the exhaust gas is low, it indicates that the amount of exhaust gas consumed by the subsequent systems is insufficient, which in turn affects the production capacity of the liquid chlorine manufacturing plant ； C. If the purity of the exhaust gas is high, it indicates that the liquefaction capacity of the liquid chlorine plant is insufficient; attention should be paid to analyzing the following three points: ① Whether the refrigeration system is functioning properly (check all refrigeration parameters) ； ② Is the heat transfer in the liquefier (evaporator) functioning properly? (Check both the tube side and the shell side separately.) ； ③ Are there any blockages or other issues causing obstructions in the pipelines and valves related to the liquid chlorine system? ； The above are my personal opinions and are for reference only. This post is meant as a starting point, hoping that fellow sailors will join in the discussion.