If the operator controls the inlet and outlet pressures p1 and p2 during the start, stop or operation of the compressor, it is possible to cause the compression or tensile load of the piston rod to exceed the allowable value, which will give the compressor The safe and stable operation brings great hidden dangers. By using the piston rod load map, it is possible to visually judge whether the load change of the compressor is within the allowable range, thereby eliminating the occurrence of overload hazards.
Practical application test There are 3 Japanese BTD-NICC type oxygen compressors in the syngas plant of a chemical fertilizer plant, the main parameters. The compressor is the key equipment in the heavy oil and gasification process in the butanol production system. The performance of the compressor will directly affect the safe and stable operation of the entire production system. For this purpose, the piston rod load diagram of the machine is shown. Taking the stage as an example: when the suction pressure p1 is 014 MPa and the discharge pressure p2 is 118 MPa, the operating point is above the shaded area, indicating the overload range, which should be depressurized; when the discharge pressure drops to p2 of 116 MPa, The operating point is below the shaded area and belongs to the safe area for stable operation. The compressor controls the movement according to the piston rod load map. In the continuous production for several years, there is no problem that affects the system production due to the failure of the piston rod overload, which creates a certain safe and stable long-cycle operation of the compressor. condition.
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