What should be done if the compressor feeds air into the synthesis tower? ?
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I worked a long night shift yesterday; a valve beneath our No. 2 compressor wasn’t closed properly. . This caused air to be introduced into the operating No. 1 synthesis tower. . We almost all went by plane. . How can we prevent incidents like these? ? This post was last edited by lxq700918 on 2009-2-22 20:38.]
It’s indeed quite scary. Are you testing the vehicle? Before the compressor is put into operation, it is necessary to verify that the valves associated with the system are in a closed state. The vent valves for each section must also be in the venting position. In particular, the valves at the sixth-section outlet for sending material to the synthesis unit, those at the fifth-section outlet for sending material to the copper washing unit, and those at the third-section outlet for sending material to the shift unit must be checked carefully; the corresponding vent valves need to be opened before the compressor can be started up for testing. If it is to be put into operation in the system, it must undergo replacement and pass the analysis before pressure gas supply can be initiated. This post was last edited by lxq700918 on 2009-2-22 20:39.]
The original poster specializes in urea process control, and the compressor is likely a carbon dioxide compressor. I’m not sure what purpose this valve used by the original poster serves; how can it get into the compressor? The compressor operates under positive pressure, so the air drawn in should not be atmospheric air; where this air comes from is a question. There is no perfect solution for preventive measures; one can only operate carefully and strengthen inspections. Being able to detect problems promptly when they arise, and make correct judgments and take appropriate actions, is also an important factor in reducing the occurrence of accidents. This requires us to continuously accumulate experience in actual production.
? The compressor operates under positive pressure, and the air drawn in should not be air from the atmosphere. Where does this air come from? – This technician is right; unless there is an inlet, under positive pressure the unit expels CO2 outward. A small amount of air entering has little impact. Because air is continuously supplied to the high-voltage coil during operation to maintain the integrity of the passivation film and prevent corrosion. If the quantity is too large and it affects operation and material balance, there’s no other choice but to shut down the system for replacement.
Could it be that the outlet pressure is too high during air injection, or that there is a leak in the compressor’s oil drainage valve or it isn’t closed properly, resulting in air leakage? It might also be caused by an excessively high temperature of the valve body! ! To avoid this situation, it is essential to make sure that all valves for draining oil and water are properly closed after each drainage operation, in order to prevent leaks; moreover, the outlet pressure must not be too high when the compressor is drawing in air! !
Follow strict operating procedures and handle tasks with care
Regardless of how the air got in, the fact remains that it did get in, which indicates that the management at the owner’s facility is not strict enough and that the inspection and maintenance procedures are inadequate. Although no accidents have occurred so far by luck, luck cannot last forever
Fortunately it was just air, fortunately the amount wasn’t large, fortunately there was no explosion — the chemical industry is too dangerous; it’s better to change careers if you can! ! ! !