If the raw gas pressure of the compressor is below the design value, can the compressor operate?
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The natural gas compressor is designed to handle a processing capacity of 150,000 cubic meters per day; however, the amount of raw gas that needs to be pressurized actually amounts to 60,000 cubic meters per day. Since the actual volume of raw gas is less than the designed processing capacity, can the compressor still operate? The inlet pressure and temperature of the compressor, as well as its outlet pressure, remain unchanged. How can the compressor be adjusted???
Sure, right? When designing the compressor, can it operate at flow rates ranging from 0 up to the designed range? The outlet pressure is constant
Personally, I think it’s okay; it’s just like using a large vehicle to transport a small donkey – the resources aren’t fully utilized, which is somewhat wasteful.
Does your compressor have a unloader? It can be set to 50% or 75% capacity, which seems to make it more economical to use:)
Personally, I am not in favor of using unloading devices; it’s due to personal reasons. Seven years ago, my unit experienced two incidents in which compressors in the reforming unit exploded and caused injuries, and at that time they were operating at 50% load. Although the cause of the accident is not directly related to this, it’s still unsettling to think about.
I agree with what was said above; my company has also encountered similar situations. Running at 100% is a waste of labor and energy. The original poster’s should be fine too; it’s just that they have a narrow mind. But more inspections are needed to reduce the amount in a timely manner.
If the rotation speed of the drive device can be reduced, it can be solved easily.
Generally, compressors have high motor power levels; using a high-voltage inverter with a high-voltage motor seems like an excessive cost, doesn’t it?
⒈The previous continuously variable adjustment mechanism can be considered; when making adjustments, it is important to ensure that the loads on both sides of the reciprocating machine are roughly equal, in order to maintain stable operation of the unit； ⒉Install a return control system on the unit to ensure that its compression ratio does not exceed the designed value. Through the above measures, the unit can operate. Last edited by Zhongyuanren on 2009-2-10 22:47]
Adjusting based on the valve opening definitely leads to waste. The initial investment for frequency conversion is high, but if you operate at low capacity over the long term, the cost can be recovered within a year after installing frequency conversion, making it profitable.
Most compressors come equipped with load control devices, so there should be no problem; it’s just that the energy consumption per unit will be higher.
It’s not just about the number of compression stages; does the compressor have a load control system?； If the compressor has more than three stages, the reduction in gas volume leads to an uneven distribution of the compression ratios across the various stages, and some stages may experience overpressure or overheating, which can affect the proper operation of the compressor. It can operate if there is a gas volume control system.
The main concern is whether the centrifuge can operate at low flow rates; due to anti-surge control reasons, safe operation may not allow the outlet pressure to reach the design value.
Thank you all. The compressor is a Kubo DPC2804; it has three compression cylinders and four power cylinders. The inlet pressure is 0.25, while the outlet pressure is 1.7 – it features two-stage pressure boosting. It’s an old model, and it doesn’t have a unloader
Friend of the original poster, I suggest that the boss upgrade the system to achieve energy savings, environmental protection, and a harmonious relationship between humans and machines.
If the process permits, intermittent shutdown can be considered.
It should be fine if the compressor inlet pressure is slightly lower than the design value; generally, a range is specified for the inlet pressure during design. However, if it is too low, the exhaust pressure of the compressor will increase, which is detrimental to the unit.
The inlet pressure is slightly below the design value, causing the press to vibrate; generally, the process is stopped in such cases, and the anti-vibration valve of the press is in the open position
It is possible to add or modify it to a stepless air volume control system, allowing for stepless adjustment while also ensuring safety