How to determine if the rich and lean liquid heat exchanger in low-temperature methanol washing is leaking?
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The pressure of the lean liquid pump has decreased by about 0.5 MPa compared to before; increasing the valve opening for the lean liquid circulation does not result in an increase in flow rate. The overall temperature of the system is about 6°C higher than it was during the same period. Please help analyze this situation.
For the temperature points on the liquid-rich side of the heat exchanger bank, there may be no remote monitoring setup; one has to check the values on-site or measure them manually to see what changes are taking place. If the temperatures start to rise from a certain point onward, it’s likely that there is a leak in that area
Damn, we just missed that. The following phenomena occur: 1. The outlet pressure of the lean methanol pump decreases, while the current increases ； 2. At the same circulation rate, the opening degree of the methanol-poor liquid control valve increases ； 3. The concentration of acidic gases decreases while the flow rate increases ； 4. Decrease in the amount of vapor generated in the flash tower ； 5. The concentration of lean methanol was originally higher than that of rich methanol, which caused issues such as an increase in the temperature of the rich methanol, among many others.