What are the causes of vibration in the outlet pipeline of the hydrogen production compressor in catalytic reforming? ? ?
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Now, the control pressure is set at 2.6 MPA for reformation, and 1.5 MPA for high-pressure control!!! A similar problem occurred some time ago; the main cause was vibration resulting from loose fixation of the outlet pipelines. The vibration was reduced after taking measures such as placing angle irons under the supports, but it has increased again now. Adjusting the reformation pressure and system pressure has not had a significant effect. I wonder if other factories have encountered similar situations? Please give me some advice!
The main reasons are as follows: 1. Further check whether there are any issues with the supports of the outlet pipeline. The outlet pipeline of the pre-hydrogenation compressor in my unit used to vibrate severely and shake, but this problem disappeared after the pipeline was welded and reinforced. 2. Check whether there are any deviations between the operating conditions and the design conditions. Since pipeline support is calculated under design conditions, deviations from these conditions can lead to vibration problems. 3. Check whether the hydrogen production compressor is operating stably. Problems with the compressor itself can cause fluctuations in the volume and pressure of the air output. 4. Check whether there is liquid at the compressor inlet.
Thanks for the advice! What other precautions should be taken when operating a compressor with liquid at the inlet, in addition to promptly draining the residual liquid from the inlet strainer tank?
Reasons for vibration: 1. Quality issues in foundation construction. 2. The process operating point is inappropriate, resulting in a resonance point. 3. Process design issues. 4. Stress occurs due to issues with the welding process. Analyze and solve it from the above aspects.
Reply 1# 947877013: Poor dynamic balancing of the machine itself, misalignment during installation, and improper foundation design can all cause the machine to vibrate, which in turn causes the pipes connected to it to vibrate as well; maintenance repairs should be carried out； For pipeline vibrations caused by resonance, identify nearby pulsed devices and adjust their vibration frequency through methods such as fixation or adding weights; also examine the throttling devices on the hydrogen pipeline, such as flow meters, control valves, and other valves, and make appropriate adjustments to them ； Vibrations caused by pressure fluctuations; whether the diameters of the inlet and outlet pipes of the unit are too small, which should be replaced during maintenance; higher gas density resulting from hydrogen purity, and improving hydrogen purity to reduce vibrations, etc ；
First, upon discovering a problem with the fixation of the outlet pipeline, they came up with ways to resolve the issue completely； Secondly, draw inferences from the handling process, conduct inspections of similar situations, and eliminate potential risks ； Third, take preventive measures.
Was the support not properly made at that time? Just make sure the thing is in place when looking for it
LZ didn’t clarify whether it’s a new or old device, nor whether it’s a reciprocating machine or a centrifuge. From what’s being said now, it seems that pipeline reinforcement is necessary in order to ensure the stability of the airflow within the unit
If the compressor is operating with liquid in it, it is necessary to check whether the high-pressure foam breaker screen is damaged, to verify whether there is a false liquid level in the high-pressure system, to control the liquid level in that system properly, and to reduce the temperature of the high-pressure fluid.
The preliminary judgment is that it’s a problem with the pipe support!