Answer: It is generally believed that fire accidents in the pressure system of oil-lubricated air compressors are caused by carbon deposits. When designing the pressure system, the compressor and the pressure system should be clean and free of carbon deposits, which can reduce fire accidents. For pressure systems that produce carbon deposits, the grade of oil is more important, and regular cleaning of the pressure system is equally important.
Experience has shown that good design, lubrication and maintenance can prevent oil-injected rotary compressors from catching fire. One of the recognized causes of fire is the interruption of cooling water, which causes the exhaust temperature to rise sharply, exceeding the normal temperature of the compressor. When the carbon deposit layer in the hot zone increases to a sufficient thickness, a fire occurs. In addition, damage to the temperature control valve can also increase the exhaust temperature and cause accidents.
However, the abnormal temperature increase caused by the blockage of the oil filter element accelerates the oxidation of the oil and also creates the risk of fire. The three important factors to prevent the risk of oil ignition are:
① Reasonable design;
② Proper selection of oil;
③ Operation and maintenance of the compressor. The following points are particularly important: keeping oil consumption low, changing the oil regularly, and ensuring that the oil cooling device works properly.
