How to deal with air compressor coking?
The main reasons for air compressor oil coking are as follows:
1. Metal ions:
The wear debris inside the compressor will not only block the oil system, but also act as a catalyst for oil oxidation. The presence of iron and other metal ions acts as an initiator for the polymerization of certain hydrocarbons. The more water content in the oil, the higher the temperature, and the tendency of metal catalysis increases. Therefore, the metal wear debris in the oil should be removed in time.
Air compressor oil reacts with oxygen, sulfur and other substances in the air under high temperature and metal catalysis to produce alcohols, aldehydes, ketones, acids and oxides. Under the long-term action of oxygen and high temperature, some hydrocarbons polymerize to form insoluble matter. The higher the pressure of the air compressor, the greater the oxygen concentration, the more severe the oxidation of the oil, and the shorter the life of the oil.
3. The influence of old oil:
Most of the current air compressors use mineral oil or semi-synthetic oil based on mineral oil, and the service life is generally between 2000-4000 hours. This kind of oil will generally coke after about two years of operation. This happens even with a normal oil change. Because it is impossible to discharge 100% of the sinking oil every time, the remaining old oil is deposited at the low point of the oil circuit, and it will participate in a new round of oil cycle along with the new oil. After a certain period of operation, the oil quality will deteriorate. Coking occurs.
4. The influence of moisture:
Since the air compressor oil is often in contact with the compressed medium, the moisture in the air will condense and enter the oil after compression, and the violent stirring of the unit during operation will make the “oil” that cannot be mixed together When the two liquids are mixed with “water” and used for a long time without changing the oil, one phase of the liquid will disperse into many particles and molecules in the other phase of the liquid, forming an emulsion. The emulsified oil not only reduces the lubricating effect, but also causes reactions such as hydrolysis of additives or base oil, causing equipment corrosion. Rust deposits gradually, heavily forming part of sludge or coke.
How to solve the air compressor coking？
Most of the current air compressors use mineral oil or semi-synthetic oil based on mineral oil, and the service life is generally between 2000-4000 hours. This kind of oil will generally coke after about two years of operation. At the same time, this phenomenon will occur even in normal oil changes, because every time we change the oil, it is impossible to discharge 100% of the sunk oil. Participating in a new round of oil circulation, when running for a certain period of time, it will cause oil quality to deteriorate and cause coking.
When dealing with this abnormal situation, the host is generally disassembled. Soak in a special cleaning agent, and then wash and soak the oil separator tank, cooler and main oil circuit components. Not only is the process complicated, time-consuming and labor-intensive, but also all the seals of the machine must be replaced after soaking. Therefore, it is very expensive to carry out a cleaning fee.
Use a special test agent for oil coking to test the oil sample. If it is determined that the oil is coking, you only need to add a cleaning agent that is one-tenth of the lubricating oil to the lubricating oil, start the machine for 40-60 hours, put the lubricating oil Lose. The inside of the machine will be thoroughly cleaned, and then new oil can be added to normal operation.
Sollant Group-Professional Compressed Gas Solutions Provider