The Research Of The Compressed Air System Contorl Optimization

According to statistics,compressed air system energy consumption accounted for 10%to 20%of the world total energy consumption.Therefore,under the environment of energy-saving and environment-friendly and energy-saving manufacturing,the problems of the compressed air system,such as the serious waste of energy and the inefficiency of operation,have gradually taken people’s attention.Therefore,under the background of this,on the basis of ensuring normal production,it has become a hot spot in the field of industrial control all over the world to improve the operation efficiency of compressed air system equipment,reduce energy consumption,avoid energy waste and achieve high energy consumption with high efficiency.In this thesis,based on the optimization of the compressed air energy-saving control system of Zhengzhou factory in Dongfeng Nissan,according to its site conditions and project requirements,first of all,the end-compressed air energy-saving control is described in two parts,on the one hand,the end-regulating valve and the pipeline model are established;On the other hand,in the aspect of optimization of end decompression control system,the balance of supply and demand of compressed air in each workshop is achieved,and the purpose of saving energy by step-down and pressure regulation is achieved.Secondly,according to the problems existing in the production process of station screw air compressor,an improved strategy is proposed.Finally,Remote monitoring and operation and maintenance of cloud platform,real-time monitoring of the site work to achieve efficient sorting and display data reports,technical documents and other functions,based on the cloud platform to achieve LAN,WAN web pages released to help crew can always see the station and workshop production Situation,easy to make the next phase of the gas plan.In the end of the energy-saving optimization control part,in the establishment of the end regulating valve and the pipeline model,the adaptive PID control method is adopted to optimize the end decompression control system,and the simulink tool is used to simulate the algorithm.By comparing the production data before and after transformation,the energy saving effect obtained after the system is put online.In the control part of the energy-saving retrofit of screw air compressor,due to the improper operation of the screw air compressor in the general production process,the energy consumption evaluation model of the screw air compressor is established.This model can effectively analyze the best work pressure belt exists.According to the disadvantages of screw air compressor self-loading and unloading control,the strategy of frequency conversion reformation is put forward.In actual project,frequency conversion PID control is realized by Siemens S7-300 PLC.