Energy-saving technical transformation of energy-saving and environmental protection technical version of the air compressor system Ye Xiaozhen, Zhang Xiaodong, Chen Chengzhong Abdomen Tobacco Industry Co., Ltd., Xiamen Xiamen 361022 precision.
As a general-purpose equipment in industrial production, the air compressor uses the air compressors of the stations 40, 1 and 201 in the factory.
However, due to the large fluctuation of the air pressure load at the end, it was found that the air compressor was frequently loaded and unloaded during operation, the cylinder pressure was unstable, the gas-electric ratio was low, and the energy consumption was large.
Therefore, the air compressor system was upgraded with energy-saving technology.
The energy consumption of the air compressor system is mainly related to the operating efficiency of the air compressor and the use pressure of the gas and electric air, as follows.
The operation of the air compressor. In addition to the fact that the objective conditions such as atmospheric pressure and ambient temperature cannot be changed, the factors affecting the energy consumption of the air compressor are the air compressor compressed air transmission process. The air compressor station should not be too far away from the gas point. The loss factor of the rounded corner connection is much smaller than that of the angled joint.
The use of compressed air. Divided air supply to avoid excessive pressure of the compressed air provided; check the leak at the end with a gas point to avoid leakage of compressed air.
Use variable frequency air compressor. The small air compressor of the original air compressor station has low load regulation, but the adjustment capability is limited, and it can not meet the frequent fluctuation adjustment of the end load to ensure the system pressure is stable. By properly setting the pressure of each machine, it can avoid frequent loading and unloading of other fixed frequency air compressors.
Partial pressure supply. The demand for compressed air, in addition to a factory line expansion line requires pressure of more than 65 cues 3, the rest of the workshop gas pressure is 50.55 cubits 3, and the demand pressure of the workshop gas consumption is only 3 dozen 13 baht other workshop gas The total amount is around 80m3min. To this end, the workshop is equipped with a small air compressor, and the output pressure of the large air compressor can be reduced from the original 0.7MPa to 0.6 cubits, 3, which can save 6 electric power.
Reduce the elbow pressure loss and remove the filter pressure reducing valve. After the main pipe network of compressed air was inspected, a total of elbows were reconstructed, and local pressure loss was reduced.
In the initial pipeline design, pressure reducing valves and filters are installed at the end. After the operation, the pressure control accuracy of the air compressor is high, and the pressure reducing valve has never been activated. Because the air compressor inlet is equipped with an air static pressure primary effect chamber and the air compressor has a precision filter behind it, the filter element of the end filter is very clean. These accessories have a large number of leaks. A total of 52 sets of pressure reducing valves and filters were removed through the transformation, reducing pressure loss and leakage points.
Check the equipment for gas leaks. Turn off the air supply valve when the unit is shut down.
The implementation effect saves energy and reduces consumption. The use of variable frequency air compressor can not only reduce the starting current, but also reduce the number of loading and unloading of the system hollow press, so it can save energy. Effectively save gas consumption by troubleshooting leaks. Compared with the years of 2008 and 20, while the output increased, the air pressure reduced by 5.5, saving 175,000 kW, h, reducing 137 tons of carbon oxide emissions.
Improve the accuracy of pressure control. Due to the improved accuracy of the frequency control motor speed, the system pressure variation of the pipe network is small, and the production process conditions are improved.
The air compressor adopts variable frequency start to reduce the wear and failure of the system equipment and prolong the service life of the air compressor.
Cai Maolin. Energy consumption status and energy saving potential of compressed air systems. Chen Zhuoru, a Chinese equipment worker. Engineering Fluid Mechanics, 2nd Edition Hole. Higher Education Press, 2004.
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