Problems with turbine-driven nitrogen compressors
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This post was last edited by hxm2087 on 2012-2-17 at 17:04. The turbine drives the nitrogen compressor, with a return valve being opened when the speed drops to a certain level. Can this setting be removed? What are the consequences?
Is the nitrogen compressor of a centrifugal type? Piston? Or? Different types of compressors have varying requirements regarding backflow.
It is best not to disable this setting, as it serves to protect the nitrogen compressor. If the speed decreases, the pressure at the outlet of the compressor will also drop, which can easily lead to compressor surge. The function of the check valve is to protect the compressor. Safety first.
It’s the Atlas centrifugal compressor; I agree with what the friend on the 3rd floor said........
This post was last edited by Air separation science * on 2012-2-18 08:28. When the steam pressure drops, the steam control valve first opens wider until it is fully open; if the steam pressure continues to drop, the nitrogen guide vanes automatically close to their minimum opening. If the steam pressure drops further, the compressor speed decreases to the minimum set value, and the reflux valve of the nitrogen compressor gradually opens to reduce pressure and prevent surging............ What is the relationship between the compressor speed and the outlet pressure?...................................................
The higher the rotational speed, the higher the outlet pressure. When the steam pressure drops, the rotational speed also decreases. As you mentioned, the steam valve will open wider until it is fully open. If the rotational speed still cannot be increased, then the guide vanes will be closed to reduce the outlet pressure. Once the pressure drops to the minimum level required to prevent surging, the reflux valve starts to open in order to ensure the safety of the compressor. The fundamental problem is actually a low steam pressure, which has an impact on the unit. When the steam pressure is low, the steam temperature also drops, and it’s possible for the steam to contain liquid, which can cause damage to the turbine blades. Be sure to pay attention to the temperature when under pressure.