The medium and high pressure air compressor has always been a type of machine that people are not familiar with. Then, due to its use and service life, it is necessary to choose high-quality air compressor accessories to meet the operation of the high-pressure air compressor. How to choose the high-pressure air compressor accessories? The high-pressure machine is composed of a variety of different parts. We can make high-quality selection of these parts according to the requirements of the high-pressure compressor work. In addition to the price, safety and reliability of the air compressor, we also There are several considerations:
1. How to use compressed air.
2. The air compressor uses low pressure.
3. Different demand air volume from peak and tip. When the difference between the low and high operating pressure is 3bar, the problem of "high and low pressure diversion" should be considered, and different models of medium and high pressure air compressors should be selected according to the changes in the peak and off-peak changes.
4. Select and configure different types and grades of dryers and precision filters according to the difference in gas quality, and focus on the quality of the configuration. It can neither waste energy nor affect the process.
5. The control technology of medium and high pressure air compressors has a fast alternation speed. It should be selected to effectively suppress the waste of centrifugal spiral empty cars, stabilize the air supply pressure, reduce the capacity of spare machines and reduce investment.
6. Comparing the nominal horsepower and high-volume operation efficiency in the catalog, the actual performance curve and air volume horsepower are more important.
7. Factors affecting energy use, such as the design space and ventilation conditions of the computer room, noise isolation, waste water, and waste heat recovery, should be fully considered. When considering the reduction of peripheral equipment, the centralized type is selected first, which has lower installation, maintenance and control costs.
8. In the two cooling methods of air cooling and water cooling, whether there is good ventilation conditions should be considered for air cooling; water cooling is not affected by the environment, which is beneficial to the service life of the air compressor and prevents freezing, bursting or blocking caused by low temperature .
9. Stable voltage is a necessary condition for power supply planning. When the high-voltage centrifuge starts up, it impacts the power grid and should always be kept in operation.
10. Appropriate maintenance space, necessary lifting equipment and access roads are very important for maintaining the machine room, and necessary professional ability training for engineering and technical maintenance personnel.
Another item is the selection of lubricating oil for air compressors, generally synthetic oil, mainly to save money, because synthetic lubricating oil has excellent comprehensive performance compared with mineral oil, such as: good high temperature oxidation stability, low carbon residue , High flash point, low volatility, good low temperature performance, good lubricating performance, wide temperature range and so on. Due to the use of synthetic compressor oil, the oil change interval can be significantly extended (8-10 times longer); the replacement of filters and oil-air separators is reduced; the replacement frequency of mechanical parts such as piston rings, bearings and seals is reduced, not only reducing the material and reduce labor costs. Special use of synthetic ester oil can significantly reduce sludge, sediment and citrus charcoal.
At present, due to the advantages of simple structure, small size, stable operation, low noise and low maintenance cost, this type of compressor has developed rapidly in the past two decades and has occupied a considerable market, especially in small and medium-sized compressors. Status, as early as the end of the 1970s, Japan's rotary compressor has accounted for 76% of the total output of compressors. Since the screw compressor has an independent oil circulation system, the safety accidents caused by carbon deposits are largely solved. However, during the use of this oil-injected internal-cooling compressor, the oil supply is misty and fully mixed with the high-temperature compressed gas, and the lubricating oil is repeatedly heated and cooled at a high circulation speed. And corrosive gas accelerates the oxidative deterioration of oil products. This puts forward more stringent requirements for lubricating oil, and solves the problem of inhibiting the degradation and precipitation of lubricants at high exhaust gas temperatures. It has promoted the development of synthetic air compressor oil. It has been proved by practice over the years that synthetic air compressor oil can meet the performance requirements of various compressors working under harsh conditions such as high temperature, high pressure and high speed, and is several times higher than mineral oil. Lifetime safe and trouble-free operation.
Due to the use of synthetic compressor oil, the oil change interval can be significantly extended (8-10 times longer); the replacement of filters and oil-air separators is reduced; the replacement frequency of mechanical parts such as piston rings, bearings and seals is reduced, not only reducing the material and reduce labor costs. Special use of synthetic ester oil can significantly reduce sludge, sediment and citrus charcoal.
In recent years, in order to save energy, eliminate the flare of combustible gas emissions from refineries, and reduce environmental pollution, major domestic refineries have taken measures to recover flare gas with screw compressors, and the recovered gas is used as heating furnace. fuel. Since the flare gas mainly contains hydrocarbon gases such as methane and ethylene, it is a better choice to use polyether compressor oil.