What are the reasons for excessive oil content in exhaust gas and how to deal with it

What are the reasons for excessive oil content in exhaust gas and how to deal with it

1) The screw oil level is too high. If the oil level is too high, the fluctuation of the liquid level in the oil and gas barrels during the operation of the unit will cause a large amount of gas to enter the oil, resulting in an order of magnitude increase in the processing volume of the oil and causing the exhaust to contain oil. Generally, after the shutdown is stable, the liquid level is 2/3 of the liquid level mirror.

　　2) The oil has not been replaced for a long time or the oil has been damaged. The oil is subdivided into glass fiber winding structure, and glass fiber is used to capture fine oil droplets. If the oil is not changed for a long time, it will become saturated and reduce the oil separation effect. In addition, when the oil is opened, obvious short-circuit cracks, etc., all indicate the failure of the oil. When the oil is damaged, the self-exhaust port will have obvious exhaust oil.

　　3) Exhaust pressure is too low. If the exhaust pressure is too low, the oil content will be relatively large, and the oil burden will increase, and the exhaust oil will appear. The pressure maintenance valve can be adjusted higher or the ball valve can be closed for improvement.

　　4) The oil subdivision return line is blocked. The oil subdivided and separated from the oil returns to the machine head through the oil return pipe. If the pipeline is blocked or the oil return check valve in the middle and the oil return port of the machine head are blocked, it will cause the exhaust to contain oil (the oil return check valve has also been installed). Reverse phenomenon). Check the pipeline or add another oil return pipeline to the inlet valve counterweight (or check valve).

　　5) For the external oil separator, if the O-ring of the center tube is damaged or improperly installed, the oil and gas will be remixed, and the exhaust will also contain oil. The solution is to remove the center tube to check the O-ring installation and whether it is damaged.

　　6) There is trachoma in the combined valve so that oil and gas are mixed. If all are resolved by the elimination method, replace the combined valve experiment.

　　7) There are manufacturing defects in the oil and gas barrels, and the separation is not good. It shows that the secondary oil return is very large.

　　8) The oil is poor, volatile, and the exhaust temperature is high.