Leakage of raw gas in urea unit
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Regarding the leakage of carbon dioxide gas from the urea unit into the circulating water system, can you discuss how to detect, judge, and deal with it? I'm worried about this.
If the leakage is large, the PH of the circulating water will be significantly reduced. If the leakage is small, it will be difficult to detect. Installing a sight glass on the return pipe with a high possibility of leakage can detect it early.
Where carbon dioxide gas leaks into the circulating water system, if it is a carbon dioxide gas water cooler, it can be judged from the temperature change. Of course, analysis is the best way to judge.
Looking at the temperature changes from the temperature measurement points of the circulating water inlet and outlet, there are two completely different change curves!
After leakage, the heat exchange is not good and the gas temperature is high. The simplest way is to open the exhaust valve, the gas will not be exhausted.
One more thing: The safety device of the circulating water system takes off, such as: Safety valves take off, explosion-proof panels break, etc.!
Turn on the circulating water high point exhaust test and take a look.
If the leakage is small, I think you can find it by looking at the pH value and conductivity. If the leakage is large, you can find it without looking at anything.
It’s faster to start from an analytical perspective.
Analyze the conductance of circulating water. If the leakage is large, it can be judged from the process indicators of the device, such as the valve position of the regulating valve, temperature, etc.
:handshake What are the factors that affect the biuret content in finished urea?
The above analysis is very comprehensive. I personally think it can be simply compared between the load of the compressor and your urea production per hour!