Design Analysis of Compressed Air Station in Cement Production Line Zhang Chunjing Zhang Songyu Xianglai Tang Zhanqi 21. Luoyang Ruize Petrochemical Engineering Co., Ltd., Luoyang 473, Henan; 2. Luoyang Cement Engineering Design and Research Institute Co., Ltd., design of compressed air station in Luoyang 4710031 cement production line in Henan The principle compressed air system is composed of the compressed air station outdoor compressed air pipeline workshop inlet device and the internal compressed air pipeline. The pressure can be selected according to the following principles. The gas pressure for cement production is mostly increased by 0.50.8, which is generally selected according to the design pressure of the highest gas supply of 0.8, 1, and then decompressed according to different pressure requirements at the entrance of each workshop. The gas quality is selected according to the different requirements of the various workshops for the compressed air quality dryness water content and oil content. The gas used for cement production is mostly controlled by pulse valve and air gun. The general design can be lower than the lower limit of the ambient temperature dew point. The dust particle size should not exceed 31. The oil content should not be greater than 1. That is, it can be concentrated in the compressed air station. Load characteristics. According to factors such as the distance between the compressed air and the gas in the production area, the total number of compressed air stations is determined to achieve an economical and reasonable configuration. The two sets of compressed air station clinker grinding system are set up separately. If the workshop air point is far away from the compressed air station, a gas storage tank should be set outside the workshop near the gas point to balance the gas volume and stabilize the pressure. 2 Process flow and typical configuration There are many types of air compressors, such as screw piston centrifugal gas compressors. The air cooling methods are water cooling and air cooling. The temperature of the compressed air discharged from the cylinder before cooling is 18, and the cooler is cooled. The temperature after cooling is around 40. Since the air in nature is humid air, when the humid air is compressed, its pressure increases and the temperature rises, but it is still unsaturated humid air. If it is cooled by the cooler, the air temperature is lowered, and then the compressed air contains water. The vapor becomes supersaturated. Therefore, it is necessary to carry out the necessary degreasing and drying treatment of the air compressor outlet gas, so the necessary compressed post-processing equipment is added to the compressed air treatment process. Typical compressed air process flow for cement production lines. 3000 production line typical compressed air station equipment configuration 1. Retracting air manifold name Model and specification Screw air compressor displacement 20 exhaust pressure 75 river 3, conveying medium compressed air, cooling mode air cooling, start mode star start supporting motor buffer tank working pressure 0.85 river, volume 21 dust removal Filter working pressure 0.8 river, filter oil content 矣3, filtration precision 矣1 micro oil filter specification Shancan 0, processing capacity 25,31 oil working pressure 0.8 river, filter oil content 0.0 level, filtration precision 0.01 dryer rated treatment The quantity is 257, the working pressure is 0.8 river, the regeneration gas consumption is 彡7, the intake air temperature is 矣45, and the injection is a set of compressed air system. The line is equipped with 3 sets of compressed air systems. 3 design process should pay attention to the design of the compressed air station plant. When the screw air compressor has a displacement of 2, it should be a separate building. It cannot be placed under the preheater dust collector frame or the size of the compression plant for investment reduction. Under normal circumstances, the net height of the plant should be above 4.5m; for hot areas in summer, the sunroof between machines should be larger than when setting the skylight; the main passage between air compressors should be above 2,1, between and after air compressors The passage between the treatment equipment should be above 1.5m, and the passage between the air compressor and the wall should be above 1.2m; the workshop should also be equipped with lifting equipment to facilitate maintenance and maintenance of the airflow organization in the plant. Especially for the air-cooled screw air Zhang Chunjing, the design and analysis of the compressor of the compressed air station of the cement production line, because the heat generated by it is all discharged by the cold air of the environment, the airflow organization of the plant is very important. 2 is the airflow organization of a typical compressed air station. Exhaust air inlet 345 3 air compressor installation bottom elevation setting. It is recommended to set a concrete platform 100200mm above the ground to facilitate the discharge of lubricating oil and not directly placed on the indoor floor. 4 matching motor for air compressor. At present, the air compressors on the domestic market are equipped with two types of motors, pole or pole motors, which correspond to two speeds 29, 1 and 1450. Relative to the same exhaust pressure, high speed means that the rotor wears faster. The service life of the rotor is shortened, so the low-speed asynchronous motor should be used as much as possible under the premise of ensuring the compression condition. Although this increases the investment, it is more economical than the frequent replacement of the rotor and maintenance. The cooling system is a very important part of the air compressor, because the air is compressed to release a large number of systems divided into air-cooled and water-cooled. The design selection conditions are as follows: 1 The ambient temperature of the air-cooled screw air compressor cannot exceed 40 弋. Air-cooled coolers are exposed to the air, and dust adheres to the fins. If too much dust is accumulated, the heat transfer effect of the cooler will be seriously affected. Therefore, the air-cooled air cleanliness is required to be high. Water-cooled coolers mostly use shell-and-tube coolers. The rear cooler is used to cool the compressed air, and the other is an oil cooler to cool the lubricant before it is sprayed into the body. Water-cooled chillers have no requirements for ambient temperature conditions, but require high cooling water quality. If the water quality is too poor, the chiller is prone to fouling and blockage, or is corroded, resulting in increased maintenance costs and even the borehole of the cooler. Originally, water-cooled screw air compressors were used in cement projects, but with the continuous improvement of cement production environmental conditions, air-cooled types were gradually promoted. This is determined by the designer based on actual conditions. The design of the lubricating oil system. Lubricating oils are required to be low in volatilization, high in oxidation resistance, high in emulsification resistance, good in abrasion resistance and water separation. It is recommended to use synthetic lubricants blended with hydrorefined mineral base oils and various synthetic base oils. These products have a wider operating temperature range, less sludge and gel formation, and lower oil volatility. In order to reduce the consumption of lubricating oil, the stable performance makes the maintenance cost lower, and the life of the bearing and even the equipment can be prolonged. It has become a universal recommendation and quality assurance product for the screw compressor manufacturer. Compressed air plant fire protection design. Fire water systems may not be designed, but mobile fire extinguishers must be configured to deal with fires caused by lubricant leaks or improper discharge. 4 Conclusion Compressed air station is a downstream specialty in cement engineering design, and often does not pay attention. However, in the actual production line operation, the compressed air station is a power source in production. It plays a vital role in the anti-blocking and blocking of the preheater, the efficient operation of the dust collecting device, and the safe and reliable operation of the host equipment such as the execution of the pneumatic valve. This paper starts with the engineering design of the compressed air station, and briefly introduces the selection factors of the process flow and the matters needing attention in the design process. It is hoped that the design of the beginning of cement engineering can avoid some mistakes, so as to ensure that the production line will not cause major production accidents due to compressed air after it is put into production. 0850029. Compressed air station design specification 3. Editor Wang Yan Tan Atlas Copco launched a new generation of high efficiency compressors and air dryer Atlas. Copco has introduced a new range of fuel injection and oil-free compressors and air dryers. The performance of new products has improved reliability in important aspects. The compressor uses the newly developed screw elements and asymmetric rotor profiles, which greatly improves the reliability of its operation. In addition, it can withstand higher temperatures and work with higher dust content. Energy efficient. Using frequency conversion technology, energy consumption is reduced by high-efficiency screw low-pressure drop and leakage-free discharge. Compared to previous products, compressors can save up to 35 energy consumption, and heat recovery dryers can save up to 20 energy. And some models of compressors have been certified as energy-saving products, and you can enjoy the price concessions. air quality. Two 21 compressors passed the German 1 inspection certification. In addition, a 2 nitrogen version compressor was also introduced. Other working air piano 1 shrinking machine with special air quality requirements for oil dust and water content
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