The issue of coordination between piston compressors and centrifugal compressors.
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Dear all**, in actual design, have centrifugal and piston compressors ever been used in series? If so, what are the potential drawbacks? If the piston compressor is placed ahead, will its discontinuous gas compression process (even when multiple such compressors are used) have an impact on the centrifugal compressor?
I haven’t seen it installed in this way before
Hehe... I feel the same! ! If such a design and installation are necessary, reciprocating machines may require multi-cylinder, multi-stage compression or multiple units connected in parallel, and a buffer tank must be installed at the inlet of the centrifuge to eliminate pulsation disturbances.
It’s not very reasonable; it shouldn’t be used in practice. Whether it is a piston machine or a reciprocating machine, its outlet pressure is relatively high; essentially, the amount of fluid discharged is equal to the amount that enters. Unlike centrifugal pumps used for pumping liquids or fans used for pumping low-pressure air, which can use outlet valves to regulate flow and pressure, there is always a problem with flow matching regardless of whether the piston machine or the centrifugal machine is placed first. Theoretically, this can be adjusted using instruments, but in practice it is difficult to control, and this can lead to damage to the compressor or even accidents resulting in injury or death. Therefore, careful consideration is required; in principle, such a configuration is not recommended, and a new selection should be made.
1. In reality, I’ve never seen anyone do such a thing. 2. Pulses in centrifugal compressors are a major drawback of such compressors – they are not desirable! 3. The speed of centrifugal compressors cannot be matched to that of reciprocating compressors. The two types of units are like fire and water in some aspects! It’s hard! ! ! !
LZ wants to obtain ultra-high-pressure gas! :Lol, centrifugal compressors and reciprocating piston compressors have similar operating principles; in most cases, using one of them is sufficient to meet the requirements, so there’s no need to use them in series. Of course, it is still possible for the LZ to ensure that such a situation occurs. When a reciprocating machine is used, a sufficiently large buffer tank must be provided; if the discharge temperature is high, a cooler is also necessary. The fluid is then sent to a centrifuge to increase the pressure further, thereby achieving pressures that cannot be attained using just one unit.
The oxygen with a pressure of around 0.0 several MPa, obtained through air separation, is compressed to 0.5 MPa by an oxygen turbine, and then sent to a reciprocating compressor where its pressure is increased to 4.5 MPa before it is fed into the gas generation furnace. The ammonia synthesis system also utilizes this oxygen