(Summary description)In the petrochemical industry, oil-injected screw air compressors have been widely used due to their advantages of reliable operation, high efficiency, long life, air volume not affected by exhaust pressure, and stable operation without surge. Especially in the public system, as an advanced aerodynamic equipment, it is widely used in the air compressor station to provide air for instrument air for the device. Therefore, the safe operation of the air compressor unit ensures the stability of the instrument wind and the safe operation of the device. During the daily operation of the oil-injected screw air compressor, due to inadequate maintenance, etc., the unit often experiences high exhaust temperature alarms and chain shutdown failures. Therefore, it is very important to conduct a detailed analysis of the faults of the high exhaust temperature alarm of the screw air compressor and the interlocking shutdown of the unit, and to propose practical and effective treatment methods to ensure the normal and smooth operation of the screw air compressor.

(1) Event description

On May 15, 2016, the J-6001A air compressor unit in production and operation suddenly stopped in a chain. It was found that the PLC display showed an alarm of high exhaust temperature, high differential pressure of oil and gas separator, and high differential pressure of oil filtration. . In order to ensure the safe operation of the device production, the standby unit J-6001B was replaced, and the faulty unit J-6001A was shut down for maintenance.

(2) Introduction to the maintenance situation

At 8:30 on May 16, 2016, the faulty unit J-6001A was overhauled. For the high exhaust temperature alarm of the unit, the high differential pressure alarm of the oil and gas separator, and the high differential pressure alarm of the oil filter The oil circuit system and circulating water cooling system of the unit are inspected and maintained. From the perspective of maintenance, there are mainly the following problems:

1) The oil and gas separator filter element is fouled and blocked;

2) The oil filter is blocked;

3) The oil cut-off valve fails and the spool is stuck;

4) The temperature control valve is faulty and stuck;

5) The oil cooler is seriously fouled and blocked.

• Categories:Industry news
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• Time of issue:2017-10-14 14:00
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