What is the reason for the high temperature of the acidic gas coming out of the heat regeneration tower in low-temperature methanol washing?
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The acidic gas coming from the top of the low-temperature methanol wash heat regeneration tower passes through an ammonia cooler, and is then separated into gas and liquid phases in an acidic gas separator. The liquid phase is sent to the stripping tower, while the gas phase has its heat recovered before being sent to sulfur recovery. What is the reason for the high temperature of the acidic gas at the gas-phase outlet of the acidic gas separator now?
Check the condition of the ammonia cooler, or whether the temperature at the outlet of the regeneration tower is too high.
Do the temperatures of the gas and liquid after heat exchange in the ammonia cooler become higher?
Pay special attention to whether there are any significant changes in the temperature, flow rate, and composition of the acidic gas at the outlet of the regeneration tower In the second step, if there are no significant changes in the temperature, flow rate, and composition of the acidic gas, check the operation of the regenerator condenser ； Step three: If everything is normal, check the operation of the ammonia cooler; most importantly, verify whether the ammonia cooler is clogged. It is also possible to check right away whether there is any blockage in the ammonia cooler! !
The temperature of the gas coming out of the thermal regeneration tower is just over 30 degrees; the ammonia inlet valve of the ammonia cooler has already been opened to over 50% – such a high opening degree has never been seen before.
Acidic gases may contain ammonia, which forms crystals in the cooling equipment and affects its cooling efficiency
Check the temperature difference between the inlet and outlet of the ammonia cooler, adjust it, and compare the trends. If the temperature difference decreases now, it indicates that the heat exchange area of the ammonia cooler has reduced; it is likely that crystallization has blocked the pipes. It’s simple to restore normal operation as well: close the ammonia cooler refill valve, disconnect the ammonia cooler, and let it warm up naturally. You’d better upload a picture so we can take a look too
This possibility is extremely low; there is negative pressure inside the ammonia cooler, so it’s only possible for acidic gases to enter the ammonia cooler. If there is ammonia in the lower temperature section ahead, it would have crystallized long ago
The ammonium carbonate crystals mentioned on the 9th floor are ammonia in acidic gases crystallizing within the tube layers.