I have a small question
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A reciprocating compressor with two-stage compression has an inter-stage cycle that runs from the second-stage outlet back to the first-stage inlet. What is the purpose of this inter-stage cycle? How should it be adjusted?
This is the return line, right? Before starting the machine, both the inlet and outlet valves of the return line should be opened fully; after startup, the return line is used to adjust the flow rate, thereby protecting the machine from excessive negative pressure at the inlet.
Hello, you can think of it as the function of adjusting the compression ratio between stages
It’s probably because your system doesn’t require such a large volume; therefore, data is sent from the second level back to the first level, which reduces the compression at that level and also helps to adjust the compression ratio. It’s purely my personal understanding.
The third floor is the correct answer; under normal operating conditions, when the outlet pressure is high and the inlet pressure is low (to prevent negative pressure at the inlet), flow will occur back and forth. The logic control for enabling backflow recovery is activated during startup and shutdown
Returning it is not cost-effective, but it allows for the regulation of flow rate and pressure, as well as the maintenance of inlet pressure to ensure the proper operation of the compressor. . . I’m not sure if what I said is correct. . . Reference. . .
Return line, two-way one, for adjusting inlet pressure
This is used to adjust the pressure at the inlet of the first compression stage; if the flow rate of the medium is insufficient, it can be adjusted to a higher value, or if the pressure at the inlet of the first compression stage is too low, it can be increased to compensate
Used for adjusting flow and pressure during start-up, shutdown, and re-start operations
Grass, you’ve already resigned – why are you still here, Jun?