Who has ever experienced the situation where the inlet tank of a reciprocating compressor becomes under negative pressure or collapses! !
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What’s confusing is that if the pressure in the inlet tank is too low, it becomes impossible for the inlet valve to be opened by the pressure difference on both sides; without any pressure, the valve cannot be opened at all, and thus it’s impossible for the valve to perform its function. As a result, the machine just runs idly, with no gas flowing in! What do you all think! Thank you for the advice
What is meant by “no pressure” usually does not refer to an absolute absence of pressure; rather, it means there is no gauge pressure, but absolute pressure is still present. The resistance of the inlet valve is still quite low; it’s estimated to be at most a few kPa
I’ve really never seen it, but that doesn’t mean such things can’t happen! Compressors generally come equipped with interlock protection to prevent such catastrophic failures; even if evacuation occurs, it’s not necessarily the inlet tank that gets flattened – it could be the pipes or other equipment, depending on which part is the weakest.
Go and learn about positive displacement vacuum pumps – how they create negative pressure. Reciprocating pumps are also types of positive displacement compressors, so figure it out on your own
It’s highly unlikely that the situation you described will occur; low-pressure interlocks are installed at the entrances
What was said on the 5th floor is correct; it happened in my company a few years ago. There were no safety interlocks back then; now, with interlock devices installed in the system, such things don’t happen.
This situation occurs in the coke tower, but it’s not caused by the compressor
Today, compressors are equipped with interlock protections: one is an interlock for low inlet pressure, and the other is an interlock for high exhaust temperature; these two aspects are related to each other. It will not cause the inlet tank to become under negative pressure or to collapse. Even in the absence of interlock protection, based on the principle of operation of the gas valve, when the inlet pressure drops to a certain level (below the pressure inside the device), the gas valve can no longer open. As a result, the temperature of the compressed gas rises, leading to damage to the equipment. Who can share a relevant case so we can all learn from it?