2026-06-23Views：
The air compressor does not necessarily produce oily wastewater. It depends on what kind of lubrication the air compressor uses.
Conclusion first
traditional oil-lubricated air compressors do produce oily wastewater, but water-lubricated air compressors do not use oil at all, so they do not produce oily wastewater. The wastewater properties of the two machines are completely different.
Why does the oil-lubricated air compressor have oily wastewater?
Oil-lubricated air compressor In the process of compressing air, lubricating oil will be brought into the compression chamber. Although there is an oil and gas separation device at the back, it is impossible to remove all the oil. There will always be some oil mixed in the condensed water and discharged. This part of the water becomes oily wastewater, which contains oil, metal debris, and dust. It belongs to industrial wastewater that needs special treatment and cannot be directly poured into the sewer.
Why water-lubricated air compressors do not have oily wastewater
water lubricated air compressor with water instead of lubricating oil, water directly into the compression chamber to play the role of lubrication, sealing and cooling. No oil is involved in the entire compression process, so the condensate discharged does not contain oil. The main component of the wastewater it produces is water, which may contain a small amount of dust and metal particles in the air, but it is essentially clear water and does not belong to oily wastewater.
How to deal with the wastewater of water lubricated air compressor
because the discharge is basically clean water, it is much simpler to deal. Many factories will collect the water and send it back to the lubricating air compressor after simple filtration to form a water cycle. Even if it is not circulated, direct discharge is easier to reach the standard than oily wastewater, and the environmental pressure is much smaller.
The key difference between the two approaches
there is oil in the waste water of the oil-lubricated air compressor, it is difficult to completely separate the oil and the water, the treatment cost is high, and the poor treatment will pollute the environment. The water-lubricated air compressor does not use oil from the source, so there is no problem of oil pollution at all, and the burden of wastewater treatment is much lighter.
So the answer is very clear, air compressor does not necessarily produce oily wastewater. Choting water to lubricate the air compressor can fundamentally avoid this problem. For factories with strict environmental protection requirements or products that require cleanliness, water-lubricated air compressors are a more suitable choice, which not only saves the trouble of wastewater treatment, but also saves the maintenance cost of oil change and oil cleaning.
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