Can the drainage of the air compression station be discharged to the rainwater pipe network?

Conclusion: It depends on what type of air compressor you are using. The water of the traditional oil-injected air compressor must not be directly discharged into the rainwater pipe network. The water of the water-lubricated air compressor is relatively clean, but the local environmental protection requirements must be confirmed first.

Let's start with the traditional fuel injection air compressor. This machine relies on oil for lubrication and sealing. When working, the oil will be mixed into the compressed air and then discharged through the air-water separator. Therefore, the water it discharges contains oil, which is called oily wastewater. This kind of water discharged into the rainwater pipe network is a pollution of the environment and will be fined if found. The oil must be removed through the oil-water separation equipment before it can be discharged after reaching the standard.

Then water lubricated air compressor. This kind of machine works with water instead of oil to participate in compression, and water plays a role in sealing and cooling. The water discharged does not contain oil, mainly ordinary water plus a little dissolved minerals. In terms of water quality, it is much cleaner than the waste water of the oil jet and is close to the level of ordinary industrial water.

However, whether you can directly drain the rainwater pipe network depends on your environmental protection regulations. In some places, this kind of relatively clean condensate is allowed to be discharged directly, and in some places, no matter what water is required to enter the sewage pipe network. In addition, the cold dryer and the suction dryer will also produce condensed water, which is also very clean and similar to the water discharged from the water-lubricated air compressor.

The safest way to operate in practice is to connect the water discharged from the water-lubricated air compressor to a water collection tank to see if the water is clear. If the water is clear and there is no oil, check the requirements of the local environmental protection department. If it is allowed to drain rainwater pipe network, it will be connected to the sewage pipe network if it is not allowed. Don't take chances and arrange directly, in case it is found to cost a lot.

In short, the water from the oil injector must not be drained. Although the water from the water-lubricated air compressor is clean, it is necessary to ask whether the local area is allowed to drain or not, and then connect the pipe after confirmation.