Pressure increase at the compressor return inlet
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During the commissioning of natural gas compressors, due to the unsuitable conditions in the subsequent processes, it is necessary to close the compressor outlet isolation valve. As a result, the compressor operates in reverse flow under reduced conditions; could this lead to an increase in pressure in the compressor’s intake pipeline? How can this issue be resolved?
Increasing the backflow inlet pressure is necessary, as the inlet pressure generally shouldn’t be too high; if it can’t be kept within the allowable range, then operation has to be stopped. If an air test is being used, the pressure release can be vented.
The intake pressure of the inlet system dilutes the pressure that returns, resulting in almost no increase
The system inlet is equipped with a check valve to prevent the backflow of pressure from being diluted