Method for driving drying and concentration system

摘要

The present invention relates to an operation method for avoiding resonance of a compressor for compressing a condensed gas as much as possible in a drying / enrichment system comprising a compressor.When the rotational speed calculated based on the pressure on the suction side of the compressor exceeds the lower limit rotational speed and within the range of less than the upper limit rotational speed, the lower limit rotational speed is determined as the rotational speed when the rotation speed immediately before the calculation is operated below the lower limit rotational speed. When the rotational speed immediately before the calculation is operated above the upper limit rotational speed, the upper limit rotational speed is determined as the rotational speed.Diagram