Catalytic main fan
Thread Content
There is a vent pipe on the casing of the main catalytic fan; during normal operation, there is a continuous abnormal noise, and the air flow rate decreases. The noise disappears after reducing the load. What could be the cause?
It is recommended to first understand the principle of the equipment, starting with the process. When pressure is high, it needs to be relieved or circulated in order to ensure that the equipment operates under normal pressure conditions. It is normal for there to be an airflow sound when ventilation is active, and the sound disappears when it stops. I’m not sure if this is what is meant; just for reference.
It is also possible that a resonance reaction is occurring.
Under normal conditions, the catalytic main fan rarely uses venting to control pressure, so Senior Shirai’s analysis is unreasonable; P
I personally agree with the answer given by Lotus. If it’s not reliable, well, if there is indeed noise, maybe knocking on the pipes a few times will fix it!
1. After seeing the question posed by the original poster, I need to find a solution. 2. The presence of a vent pipe is one known condition, but there are multiple unknowns. 3. It’s difficult to determine how to assume conditions in order to find a solution. :(
I don’t want to defend myself; I’m really afraid that saying “uncritical handling” could lead to a cycle, and there’s also the issue of “not being sure if this is what is meant”. The term “abnormal noise” is too vague – I remember that it took several attempts to figure out why the check valve vibrated when the flow rate was insufficient. One needs to improve their skills in understanding exam questions: lol
Senior, many issues become clearer through discussion. I’m not necessarily correct either; it’s just the reasoning process based on conventional approaches.
It is suspected that the shaft end seal oil has accumulated at the pipeline elbow, causing noise