Synthesis tower level
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How to maintain the liquid level in the synthesis tower under abnormal conditions?
Since it’s about maintaining the liquid level, more should be added and less removed.
It depends on what kind of abnormality you are referring to. If the ammonia pump stops operating, it is generally necessary to reduce the discharge valve of the synthesis tower, increase the pressure in the low-pressure drum, and adjust the frequency of the methylammonium pump.
It depends on the specific circumstances; the most effective way to maintain the proper liquid level in the synthesis tower is to reduce the flow rate at the outlet control valve of the tower. At the same time, it’s necessary to take into account the pressure in the low-pressure drum, as well as the performance of the ammonia pump and ammonium methoxide pump. Sometimes it may also be advisable to slightly increase the exhaust venting volume in order to raise the liquid level a bit, thereby providing some extra time to stabilize it. CO2 should not be released unless it’s absolutely necessary.
It’s difficult to answer your question; if the compressor stops working, the liquid level definitely won’t be maintained. By switching to the ammonia pump or methanol pump and reducing the liquid level, as well as closing the outlet valve of the synthesis tower, it can basically be ensured. If there is a fault with the liquid outlet valve of the synthesis tower, the liquid level cannot be maintained properly. Generally speaking, increasing the pressure of the low-pressure drum and reducing the liquid outlet valve of the synthesis tower are the most basic methods.
In my opinion, it is important to increase the low-pressure holding pressure; otherwise, the more often the synthesis liquid level control valve is closed, the lower the liquid level will become