Diseño e implementación de un Sistema de Control para el Proceso de Alimentación de Material Hacia el Molino de Crudo en Planta Chimborazo UCEM-CEM.

Abstract

A control system was designed and implemented, supervision and data acquisition (Scada), for the process of feeding materials toward the raw mill hoppers, in the National Union Cement Company plant Chimborazo. The actual operation of the process and its constituent elements was observed, to determine its productivity, conducting performance tests, which allowed us to establish the best alternative automation. Using a programmable logic controller (PLC), Siemens model S7 315-2DP, it was programmed with the Step 7 software, control of conveyor belts and unloading, setting in master mode operation within and industrial network of decentralized peripheral field (Profibus DP). The network had two ET 200M systems, used as controlling signals, configured in slave operational mode. A man-machine interface (HMI) was designed, using a panel Siemens MP370 model, programmed with the flexible Wincc software, for the monitoring of the material of the hoppers, and the detection, localization of faults, using inductive sensors, from level and limit switches, which allowed to obtain data regarding the operating state from the constituent elements of the process. The system that was designed allow us to improve the productivity in this process, optimizing the working time, reducing waste limestone material of 1.98 to 0.13 % and the material clay 3.2 to 0.21%, also decreasing the duration of maintenance activities. In conclusion optimize the performance was achieved through process automation, so it is recommended to the company, the use of manual and electrical drawings provided for the correct handling of the system.