Automation of Technical Systems with Periodic Operation

Abstract

A problem of automation based on programmable logic controllers (PLC) of gas-nitriding production processes combined with catalytic ammonolysis is considered. The automation is directed to an increase in stability, economic efficiency of production, and lowering the danger of toxic emissions of gaseous ammonia. To ensure the continuity of catalytic ammonolysis, it is proposed to use two production lines for gas nitriding operating by turns. The by-turn operation of two identical lines ensures the continuity of production manufacturing and forms the economic base for more effective implementation of measures ensuring the environmental safety. The method of minimizing accidental emissions of ammonia by using the sprinkler fire extinguishing system is offered for processes with its use. The trend of processes in two production lines of gas nitriding is presented by the operation graph based on the Petri net. A model in a form of the operation graph makes it possible passing to the implementation of the control system of the production process. For this target, after the graph is considered and analyzed, operator formulas are formed, which are the effective form of the order for PLC programming.