Reciprocating compressor full return
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There is a return line between the inlet and outlet of the reciprocating compressor. I would like to ask if this return line can be used for full return? If total reflux can be achieved, for example, if the inlet pressure is 0.2MPa and the outlet pressure is 5MPa, then the state of total reflux should be that the outlet is equal to the inlet. Then the natural inlet pressure is very high, which is obviously not allowed. So what should it look like to achieve total reflux? Please give me some advice, heroes.
Full reflux is possible. This issue has been fully considered in the design of the compressor. Full reflux will have little impact on the inlet pressure, which is okay. However, attention should be paid to the inter-stage cooler being put into use, otherwise the temperature of the return gas will be too high.
The inlet pressure of the compressor must be considered
General return pipelines take these issues into consideration. When the gas flows through the pipes and valves, the pressure has basically been relieved, ensuring that returning to the inlet does not affect the operation of the compressor and ensures that the compressor is within the normal compression ratio range.
Because the outlet pipeline is much thinner than the inlet pipeline, the gas returning to the outlet undergoes a interception and expansion process when passing through the return valve (even if the return valve is fully open). At this time, the pressure will become smaller, which is similar to the inlet gas pressure. Therefore, although the gas needs to be cooled between sections of the compressor, on the return pipeline, downstream of the valve, not only does it not need to be cooled, but sometimes it also needs to be heated because the temperature after expansion is too low (tens of degrees below zero). In addition, the outlet pressure of the compressor depends on how "tightened" the outlet valve is. If it is unobstructed, the pressure will not rise. This post was last edited by superblade on 2009-3-31 10:41 ]
No problem. Consider the compressor outlet back pressure. These factors have been taken into consideration during design. Generally, the pressure level of the compressor gas pipeline is considered based on the outlet pressure.
You can consider full reflux, but it depends on whether the hydrogen pipeline network can withstand it. In other words, reflux will cause the pressure of the hydrogen pipeline network to increase, and either less hydrogen will be produced, or the pipeline network will be properly vented, which is fine.
Brother, does the boost of the reciprocator rely on being pressed? If you open the outlet to the atmosphere, do you see the pressure? When facing the atmosphere, atmospheric pressure has no gauge pressure! ~So there is no problem when there is full reflux, but you have to pay attention that the interstage cooler must be running well, otherwise the temperature will be too high! ~
The general design guideline is: The return line ensures full return flow to ensure the variable operating conditions of the compressor. In the case of multi-stage compression, facilities such as pressure reducing valves and coolers are installed on the return line.
ask: Why does full reflux increase the pressure in the pipe network? How does it grow taller? Why does full reflux occur when the compressor is first turned on?
Put the compressor into production slowly to reduce the impact