Application Technology Compressed Air System Energy Saving Potential Analysis and Application Yang Jing Jiagang Steel Plate Branch, Shanghai 20190 Abstract This paper mainly introduces the energy utilization of compressed air system, and introduces some compressed air systems by tapping the energy saving potential of compressed air system. Optimized measures can be taken to reduce the rate of compressed air loss, save energy and increase the economic benefits of enterprises. In particular, the operating costs are high, and energy costs account for around 75. According to the data, many compressed air systems can achieve the above energy-saving effects through energy-saving retrofits, such as the application of pipe network optimization technology, variable pressure kitchen control pressure control technology and central control technology. Of course, each compressed air system is different, and the applicable energy-saving technologies are also different. The application of the technology should be based on a comprehensive analysis of the dynamic characteristics of the system, and it is difficult to achieve the expected energy-saving effect by blindly implementing an inappropriate energy-saving technology. This article is called Baosteel, the medium and heavy plate branch company compressed air system, through comprehensive testing and analysis, proposed a solution, and achieved a certain energy-saving effect. Compressed air has three main purposes. The power uses compressed air as the energy to complete the work. The process uses compressed air to become part of the process. The control uses the instrument to stop, start or adjust the operation of the mechanical equipment. The equipment for producing compressed air is an air compressor, and the raw material is air, which produces different kinds of compressed air through different processes. In the process of production, some waste occurs. This paper aims to reduce the waste of the compressed air system and maximize the benefits of the enterprise. 1 Analysis of the current situation of compressed air system According to the analysis of the three-year operation of the compressed air system of Baosteel's medium and heavy plate branch, it is concluded that the energy consumed by the compressed air system is significantly higher than the actual energy consumption, and the pressure fluctuation of the leakage system is oversized. The network operation pressure is not correct. It consumes about 5, 1.1 system leakage. Through the test of the system flow, it is found that when the production of the wind is stopped, the system still has the flow value and is relatively stable. This part of the flow is basically a system leak. Caused by. 12 system pressure fluctuation is too large The energy consumption of the compressed air system is proportional to the supply pressure of the system. The higher the system air supply pressure, the greater the energy consumption of the air compressor, the higher the compressed air supply pressure, 1 or the air compressor The energy consumption increases by about 78. The minimum pressure fluctuation of the compressed air system must meet the most demanding pressure requirements of the system, that is, the minimum value of the system pressure fluctuation is higher than the maximum value of the process demand pressure. Through the analysis of the system flow pressure and the air compressor power curve, it is found that the flow pressure change of the compressed air system is a dynamic process, and the working state of the air compressor not only has its own working efficiency, but also causes the system pressure to fluctuate drastically. This not only leads to a decrease in system efficiency, but also sometimes affects the reliability of the process, resulting in a reduction in the rate of rejects or process efficiency. 13 The air entering the compressor has a large moisture, which affects the efficiency and quality of the compressor. From the perspective of energy saving and system reliability, the system pressure is more stable, the system is more reliable, and the system energy consumption is higher. The lower it is. The greater the range of system pressure fluctuations, the higher the average supply pressure of the system and the higher the energy consumption of the system. From the curve of system pressure with time, it can be seen that the minimum pressure of the system is only 6 kg when the gas is in the highest state, and the pressure is up to 8 kg, and the system pressure fluctuation range is as high as 2 kg. Operating at a pressure range of kilograms. This shows that the system has a large energy-saving space under the premise of meeting the process requirements, and also shows that the system supply pressure has a certain downward adjustment space under the premise of meeting all process requirements. 2 system optimization measures 21 to avoid compressed air leakage test system leakage can be measured by direct test system flow measurement air compressor upper download cycle test system pressure. System leak control methods include preventive leak detection and repair application of a gas-saving device to cut off unnecessary air supply. The pressure loss of the compressed air depends on the cross-sectional area flow rate and the length of the pipe inside the pipe. Pipe diameter selection It is recommended to select the size of the main pipe connected to the air compressor in the air compressor station to ensure that the flow rate in the pipe does not exceed 618. The size of the main pipe should be selected from the air compressor station to ensure that the compressed air flow rate does not exceed the anti-gas. The pipe size of the point Branch Pipe should be chosen to ensure its compressed air, not a ship like a gun. 23 Correct handling of compressed air No matter which type of compressor is of its type, it absorbs impurities from the air and concentrates them several times. The rated gas production is 5 wipes of air compressor + 2,70 relative humidity and 1 bar absolute pressure, and the water input into the main line is about 30 liters during the 8-hour running time. Approximately 20 liters of water is condensed in the form of condensed water, and the post-cooler 7 bar presses the working pressure and the outlet temperature +30. As the air progresses, the remaining chilled water accumulates at the appropriate point of the air main line. The result is costly maintenance, repair and production losses, which can be reduced by adding a refrigerated dryer at the front end of the compressor to reduce the moisture content in the air. For every 1 increase in system pressure, the system will consume 2 more compressed air. Increasing the pressure of the holes present in the air system increases the flow rate of air through the system. Both leaked and unregulated gas volumes are a potential component of the artificially assumed gas volume. Repairing the leak without controlling the pressure is not completely effective. The dynamic characteristics of the compressed air system vary, and the comprehensive diagnosis of the compressed air system is the basis for the correct evaluation of the energy-saving space of the compressed air system. The energy-saving measures of the compressed air system should be formulated according to the specific conditions of the system. Not every energy-saving measure is applicable in any system. 3 The system optimization plan should not only consider the high efficiency of the current system, but also consider the future development of the system, and the system efficiency is still efficient. The application of energy-saving measures has greatly improved the efficiency and life of the air compressor itself, avoiding a lot of waste. At the same time, after the series of measures are used, the compressed air system can achieve 2,50 energy saving effects. Compressed air is the most energy-consuming species in the plant's basic power source, electric water and compressed air, accounting for about 20% of the total energy consumption of the plant, of which 25 is wasted in leakage, and 15 is wasting book demand, truly with straightening, Usually not more than financial. In fact, compressed air is the most energy-consuming type of electricity and compressed air in the basic power source of a plant. It accounts for about 1020 of the total energy consumption of the plant, of which 25 is wasted in leakage and 15 is wasted in sexual demand. Directly related to production is usually no more than 6. However, the high-efficiency compressed air system is a very professional pneumatic technology and engineering category. In addition, the general user has no way to start and lose because of the lack of correct use concept and management data. It is a pity to improve the opportunity. However, the high-efficiency compressed air system is a very professional pneumatic technology and engineering field, and if it is done, it can ensure the maximum benefit of the enterprise. the company. 掾考文王é©åŽç‰. Energy and sustainable development. Beijing Chemical Industry Press, 2005. Huang Suyi. Energy and energy saving technologies. Beijing China Electric Power Press, 2004
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