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High-pressure air compressor: how to deal with the lubricating oil water of high-pressure air compressor?

　

High-pressure air compressor: how to deal with the lubricating oil water of high-pressure air compressor?

High pressure air compressor: many enterprises are air compressor. Generally, rated exhaust pressure (Mpa) of 10-100 is designated for high pressure air compressors. Lubricating oil of enterprise high pressure air compressor often enters water in the operation process, which is a big hidden danger to the safe operation of equipment. To find out the cause of water, timely removal of water in the oil.

I. Fault analysis

(1) The outlet pipe of high pressure air compressor is provided with a check valve. When there is high temperature and high pressure wet air, the high temperature and high pressure wet air will be discharged through the exhaust valve of the air compressor, but it will still carry a certain oil and water composition after the cooler.

It should be noted that although the second and third intercooler and aftercooler of high pressure air compressor are equipped with gas-water separator, they are used to separate the water generated in the compression process, but in fact, in the operation process, the effect is not very ideal.

Secondly, due to the relatively long standby time of high-pressure air compressor, the moisture generated by exhaust will gather around the pipeline and check valve. This situation will lead to water backflow into the chassis, which will gradually increase the water content of the lubricating oil, resulting in oil level alarm of high-pressure air compressor.

How can we explain that the exhaust water content of air compressor is seriously exceeded? It depends on whether there is milky liquid flowing out of the pipe when the outlet pipe of the air compressor is removed after shutdown. If found, it is the exhaust water content of the air compressor seriously exceeds the standard.

(2) According to the operation requirements of the air compressor, the air compressor should have a small running time to prevent the oil level reading error caused by water in the crankcase. Water and oil do not mix and the coexistence of the two causes oil to deteriorate rapidly. The running time is generally not less than 10 minutes, which should be enough to heat the air compressor to the water of gasification and condensation. The current operating time of the air compressor is 7 minutes, which obviously cannot meet the requirements.

Second, treatment

(1) In view of the lubricating oil inlet problem of high pressure air compressor, technicians should replace the well-sealed pipe check valve in time, and install an oil-water separator with high water removal efficiency after the outlet pipe of air compressor. The oil and water separator is filtered by a filter element.

After the high-temperature compressed air enters the oil-water separator from the inlet, it is directly intercepted by cyclone separation, inertial collision separation and ultrafilter filtration, and discharged through the sewage outlet. The dehydrated compressed air is discharged through the outlet to meet the needs of high-pressure gas.

(2) The sewage outlet at the bottom of the oil-water separator is equipped with an automatic sewage discharge solenoid valve. The automatic sewage discharge interval is 2 minutes, and the sewage discharge time is 5 seconds. Under the condition that the normal operation of high pressure air compressor is not affected, the running time of air compressor can be effectively extended by increasing the sewage discharge time of the separator, so as to meet the running time requirements of air compressor.

After the trial run, the air compressor suppressed 4.15-4.40 mpa since the automatic start, and the running time was more than 11 minutes.