Regarding the issue with the chlorate decomposition tank
Thread Content
Dear friends from Sichuan, there are several important parameters to keep an eye on during the operation of the chlorate system. One is temperature, which should generally be maintained between 90 and 95. The other is pH, which needs to be kept below 1. I have a few questions here: Which one is this temperature controlling? Does it refer to the temperature inside the decomposition tank, or the temperature before it enters the decomposition tank after being heated by the plate heat exchanger? The temperature outside the decomposition tank is 94 degrees, but the temperature inside the decomposition tank is only 75 degrees. Will the chlorates be decomposed thoroughly under such conditions? Are there any side effects or risks? The hydrochloric acid I’m using has a concentration of 17%; based on the amount required for a 31% acid concentration, the pH value remains very low, which indicates that there is an excessive amount of acid. Is this related to the low temperature in the decomposition tank? Could it be that the decomposition isn’t complete? The chlorate level was 21 before I entered the tank, and it was just over 9 after I came out.
The heating temperature refers to the temperature after the heat exchanger; the temperature inside the tank is only for reference, and it is generally lower due to factors such as heat dissipation.
Let me talk about the situation here: the temperature in the decomposition tank is 84 degrees, and the acidity level is above 0.5 mol/L. Generally, the concentration of chlorates in the export stream can reach 2 g/L. The temperature mentioned here is that of the brine after it exits the heat exchanger and before it mixes with the acid and enters the tank; the temperature inside the decomposition tank has not been measured. Let me help you check. You can’t just measure the pH; you also need to check the acidity level, which should not be lower than 0.5 mol/L nor higher than 0.6 mol/L. If it exceeds these limits, it’s bad for the pipeline equipment. Another issue is the liquid level in the decomposition tank; it is advisable to maintain a high liquid level in the tank so that the decomposition solution stays there for more than 3 hours. Here, the volume of liquid in the tank is 83 cubic meters; the liquid level is above 55%. The flow rate of saline being added to the tank is 10 cubic meters per unit time, and the approximate decomposition time is a little over 4 hours.
At low temperatures, there are no side reactions or hazards; only the decomposition rate slows down. However, the amount of acid used must not be too low, as this can lead to explosions