Maintenance of air compressor

　　Accident prevention of air compressor by air compressor

　　Air purification by air compressor suction, air through the 25m high tower is sucked into the suction air filter, air filter bag through the needle. After purification to the air compressor, filtered air in the air compressor is compressed to 0.67Mpa by air cooling tower washing and cooling, to remove moisture and molecular sieve adsorption carbon dioxide and other hydrocarbons.

　　The main risk factors of fire and explosion in the process of air purification and compression are:

　　1) the effect of air filter is not good. The amount of dust in the air is large and easy to form carbon deposition. The adsorption effect of molecular sieve is reduced, which makes hydrocarbons enter the subsequent distillation column.

　　2) the cooling water system failure. Air compressor cooling water interruption, water shortage or excessive temperature cooling effect, compressor high temperature, leading to oil thermal cracking, formation of coke in the compressor bearing, cylinder, valve, exhaust pipe, cooler, separator and buffer tank etc., coke is a flammable, in high temperature heat, mechanical impact under the impact of airflow, can lead to coke combustion, carbon oxides (such as CO), when the concentration reaches the explosion limit, combustion and explosion will happen.

　　3) failure of oil injection pump or lubricating oil system. The failure of air compressor oil injection pump or lubricating oil system can lead to insufficient or interrupted lubrication oil supply. The quality problem of lubricating oil can cause poor lubrication effect, and the mechanical friction heat of compressor will become the ignition source of air compressor system fire and explosion. Air purification by air compressor suction, air through the 25m high tower is sucked into the suction air filter, air filter bag through the needle. After purification to the air compressor, filtered air in the air compressor is compressed to 0.67Mpa by air cooling tower washing and cooling, to remove moisture and molecular sieve adsorption carbon dioxide and other hydrocarbons.

　　Dangerous and harmful analysis and prevention of air compressor

　　The abnormal occurrence of compressor and its supporting parts may lead to the failure of air compressor or the explosion of air compressor.

　　Risk analysis and accident prediction of air compressor

　　(1) because the air has the oxidation property, especially under the high pressure, the conveying system has higher flow rate. Therefore, the danger of the system is not only dangerous to oxidation and heat, but also has the danger of high speed wear and friction. Because of the compressor cylinder, gas storage device,

　　The air transport (exhaust) pipeline can explode because of overtemperature and overpressure. Therefore, the mechanical temperature of the components of the compressor should be controlled within the allowable range.

　　(2) the mixture of the atomized oil or its decomposed substance with the compressed air can cause an explosion.

　　(3) the compressor oil seal and lubrication system or air entrance gas does not meet the requirements, so that a large number of oil, such as hydrocarbons into the deposition in the system, such as low-lying, flange, valve, bellows, diameter, in under the action of high-pressure gas, gradually by atomization, oxidation, coking, carbonization and decomposition, a potential explosion condition the.

　　(4) and air system does not regulate the deliquescence clean, alternating hot and cold homework may cause to produce rust flakes in the inner wall of the tube, high speed gas under the action of a source of ignition.

　　(5) the instability and surge in the air compression process can cause a sudden increase in the temperature of the medium. This is the result of the local adiabatic compression of the fluid (air) under the sudden action of the system.

　　(6) during the repair and installation work, flammable liquids such as wipes, kerosene and gasoline fall into the cylinder, air receiver and air pipe. When the air compressor starts, it can cause explosion.

　　(7) the mechanical strength of the compressed part of the compression system is not in accordance with the standard.

　　(8) the pressure of compressed air exceeds the regulation. All of the above conditions may cause an air compressor failure or an air compressor explosion accident.

　　Two, the prevention of the accident of air compressor

　　(1) air compressor and its supporting tanks and piping systems should be designed according to the relevant national design codes. Dry filters should be installed before the suction pipes of large air compressors.

　　(2) when the air is compressed, the temperature rises sharply, and the air compressor must be equipped with an effective cooling system. Large air compressor cooling water system, water protection protection device must be sensitive and reliable. If the water supply is interrupted in the operation, the water supply is strictly forbidden, and the treatment should be stopped.

　　(3) the design and operation of the air storage tank should comply with the provisions of the "pressure vessel safety technology supervision regulation", and install the necessary pressure indication and overpressure regulation and alarm system. If necessary, the interlocking device shall be designed.

　　(4) the large air compressor should set up the alarm interlock device, such as surge, vibration, oil pressure, water supply, shaft displacement and bearing temperature according to the characteristics of the equipment. The air drop test should be done before driving.

　　(5) the air with a certain pressure has strong oxidizing. Therefore, during storage and transportation, the air must be strictly prevented from mixing the lubricating oil and other organic matters into the interior, so as to avoid oxidation of oil and other organic substances and cause combustion or explosion accidents in the system.

　　(6) in the process of high-speed flow, rust and mechanical impurities may become hot fires. Therefore, the location and height of the air inlet should meet the safety requirements during the operation of the compressor, so as to prevent foreign objects from entering.

　　(7) in the operation of air compressor, if the sound noise is abnormal, the parking is immediately checked and handled.

　　(8) the continuous cold start of the large air compressor should not be more than three times, and the hot start is not suitable for more than two times.