| Compressor station is an important workshop of metallurgy, petroleum chemical engineering and refrigeration. It is compressor station's task to provide compress air for each craft production line, and is an essential place to have supply energy. The production characteristic stable condition of compressor station affects user product quantity directly, so compressor station craft configure must match to produce request, running control request stability.The main equipments of air compressor station as air filter, air compressor, the compress air-drying machine,air tank,pipe and valve etc. These equipments constitute the compressed air to provide to annoy the system, they have cooling system, the instrument air system, instrument examination system, with realization air compressor station for production a assurance pressure, flow need.To provide satisfaction compress air, automatically control flow is automation task.With the automation control level increasing,building a no man guard air compress station is a develops inevitable topic in the process.MA STEEL will build an energy watching and controlling centre at MASTEEL new Area. It made a computer technology basing system of the process controlling, the energy managing, the energy distributing.It is called the energy center project. The energy center project seek the energy manage system (EMS) as its interface. EMS is a computer system of factory managing and controlling.MASTEEL constructs a compressor station at each of the three place that need compress air opposite concentrative in the new area. It is iron-smelting air compressor station and steel rolling compressor station and cold steel rolling compressor station. Compress air that the three compressor station produced is connected each other by pipes. It can supply compress air for each other when which compressor station is fault. In order to match with the construction of EMS, the new area air compressor station adopts the site no man guard and watching and controlling remote to run. This design is the iron-smelting air compressor station automatic control design that suit for no man guard.The automatic control system of iron-smelting station adopts SIMATIC PLC S7-400 to control. The main equipments that system supervise and control include air centrifugal compressor and air filter and dry air machine and voltage transform and power supply equipments and valves. Air compressor CMC communicate with PLC by Modbus. The PLC communicate with EMS by ether net, it can send signal of air compress station to energy control center for controlling.This design includes to the equipments of the air compressor station selection, considering the stability and control well. The scheme confirmed, discuss economical and carrying out of the scheme. The function request writing, realize no man guard and controlling remote which function must have. The signal table confirm, realize the function request which signal must gather. Hardware configured and integrated. Programming according to the function request and the signal table and testing after the hardware installed. We will summarize the result of the system at last.This text according to MASTEEL new Area iron-smelting air compressor station actual construction engineering carried on to write for four-part, mainly elaborated that no man guarded compressor station control idea and control realization.The first chapter introduce the study background and running mode of iron-smelting air compressor station and request of automation.The second chapter write the main craft equipments of compressor station, the iron-smelting air compressor station craft equipments type choosing physically. The third chapter is this text emphases.It delineate the controlling need, the controlling way,signal analysis and programming. The forth chapter describe the system running effect. |
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