Ammonia compressor interlock
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Do all the separation tanks in an ammonia compressor need to be equipped with a high liquid level interlock?
To ensure the safety of the compressor, they should all be installed
It’s not necessary, right? I’d appreciate some advice from those who know more!
For the safety of the compressor, they must all be installed
The interlocks for ammonia compressors are divided into unit interlocks and process interlocks. Unit interlocks such as those related to lubricating oil, control oil, and seal oil, as well as interlocks for vibration and displacement, must be in use. Anti-vibration interlocks and emergency shutdown interlocks are also necessary. As for process interlocks, such as those related to the liquid level in separation tanks or the high liquid level in ammonia coolers, their use can be determined based on the stability of the plant’s operation; if the operation is stable or if the reliability of these interlocks is low and they cause frequent shutdowns, then those interlocks can be disabled.
I agree with the view from Floor 5; we have not set up a interlock for high liquid level in the separation tank. Even when we control the oil pressure, there’s no interlock effect – you might not believe it, right? Axle temperature, displacement, vibration, lubricating oil pressure, dry gas seal, exhaust pressure, and overspeed must be equipped with interlocks.
An interlock for the liquid level of the compressor oil-water separator is not required.
For the liquid level in the ammonia compressor separator, it is not necessary to install a high-liquid-level interlock; as long as the liquid level in the ammonia cooler is well controlled and no accidents involving ammonia occur, under normal conditions very little liquid ammonia is separated out in the ammonia compressor separator. The separator of our ammonia compressor is operating properly, and the liquid level in the ammonia cooler is normal – there is almost no liquid present.
This post was last edited by HZG on 2010-9-14 at 15:59. I agree with the view in post 8: there is no need to install a high-level interlock for the liquid level in the ammonia compressor separator. Our company doesn’t have any of those; just be careful when operating it.