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the working principle of oil and gas separation filter

(1) Composition and characteristics of oil and gas mixtures
Oil-air mixture-generally consists of lubricating oil and compressed gas, in which lubricating oil exists in two forms: one is liquid phase form; the other is gas phase form, this form of lubricating oil is mainly lubricated by liquid phase form. It is produced by the gasification of oil, which is affected by the pressure and temperature in the equipment, and the saturated vapor pressure of the lubricating oil will also affect the amount of lubricating oil in the gas phase. Generally speaking, the higher the temperature and the greater the pressure in the equipment, the more lubricating oil in the gas phase; on the contrary, the lower the temperature and the lower the pressure, the more lubricating oil in the liquid phase. The lubricating oil in the gas phase also has the characteristics of other gases, so it cannot be separated by mechanical methods, but can only be separated by chemical methods. Therefore, in order to separate oil and gas, it is necessary to first convert the lubricating oil in the gas phase into the lubricating oil in the liquid phase. Reducing the temperature and pressure is the most common method and the most effective method. In addition, the vapor pressure is saturated. It is also a common method to convert the lubricating oil in the gas phase to the lubricating oil in the liquid phase. Since the temperature or pressure of the equipment cannot be reduced to a very low level, the performance of the lubricating oil should be continuously improved in the actual production process. Synthetic oil or semi-synthetic oil such as lubricating oil with low vapor pressure saturation can be used. Thereby reducing the oil content in the exhaust gas. Of course, there are generally very few lubricating oils in gas phase form. During the operation of the equipment, since it takes a certain amount of time and pressure to change the lubricating oil from the liquid phase, in the actual process, the pressure in the separation filter is not very high, and the separation process is also very short, so most of the oil-gas mixture is in the liquid phase. form of lubricating oil. Therefore, how to separate the lubricating oil in the liquid phase to the greatest extent is the key content of the work. The diameter of the lubricating oil droplets in the liquid phase is generally 1 to 50 microns, and the smallest oil droplets are only microns in diameter, so the properties of different oil droplets are also different. By gravity, the large oil droplets can be deposited to the point of the separator, but the small oil droplets are suspended in the gas and are difficult to be separated.

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