Air compressors have been widely used in all aspects of the industry, but most of the compressors currently use lubricating oil, which inevitably contains oily impurities in the compressed air. The general extensive company installs a physical degreasing unit. No matter, but this kind of component can only target the oil droplets and oil mist of the gas, and the air also contains the oil in the molecular state.
There are currently three methods for highly purifying air:
1, cooling and filtering
The main principle of this method is to cool down. The principle of this method is simple. The oil molecules are liquefied, turned into oil mist, and filtered again. The cost is low. If the filter element with high precision is used, most of the oil mist can be removed, but It is difficult to completely remove the oil, the gas can only meet the general air quality requirements, and the filter element accuracy is high.
2, activated carbon adsorption
Activated carbon can effectively remove impurities in the air, and the effect is excellent. The purified air can meet the requirements of high gas use, but the cost of activated carbon is high. After a long time of use, the purification effect will be reduced, and the replacement cycle is affected by the amount of oil. Unstable, once the activated carbon is saturated, the consequences are very serious, and it is not possible to continuously remove the oil. The replacement of the activated carbon must also make concessions in design.
3. Catalytic oxidation
The principle of the method can be simply understood as the oxidation reaction of oil and oxygen in the gas, which "burns off" the oil into carbon dioxide and water.
The method is technically demanding, and its core is the catalyst for the reaction. Since combustion does not really occur, it is necessary to use a catalyst to accelerate the reaction process, in which the catalyst has a large area in contact with the gas, and the catalytic effect must also be powerful.
In order to enhance the catalytic effect, it is necessary to react at a high temperature and a high pressure, and a heating device is also required. Greatly improve the energy consumption demand, and because the oil molecules in the gas are far less than the oxygen molecules, in order to ensure the effect, the reaction time also has certain requirements, so there must be a reaction chamber. If the equipment detection and process technology is not high, it is difficult to achieve Requirements, the initial input cost of the equipment is high, and the equipment is uneven, there are risks, but the excellent equipment can reduce the oil content of the gas to a very low level, meet the oil-free requirements, and the catalyst does not participate in the reaction itself, so the use period is long, and The time is determined, and the later investment is lower than the energy consumption.
