Desarrollo de un controlador de temperatura en lazo cerrado para los hornos rotativos de la empresa Frigomacz Cía. Ltda.

Abstract

This project describes the development and implementation of a closed loop temperature controller for rotary convection ovens of the company FRIGOMACZ CIA. LTDA, located in the Conocoto sector in the city of Quito-Ecuador, in order to eliminate the temperature position error on the set point and reduce the time it takes for the furnace to recover heat before the disturbance caused by the opening Door This project has two thermocouples located in the oven and another in the cauldron respectively, a frequency converter to vary the speed of rotation of the fan, and a sensor that detects the door opening. Industrial devices available in the local market were used, such as: a SIEMENS LOGO Programmable Logic Controller (PLC), PT100 temperature sensors, inductive sensors, actuators, and a TDE logo screen from which the set point values are entered and set. visualize the cooking process variables. The control panel and the Man-Machine Interface (HMI) were assembled without altering the original structure of the furnace, tests were carried out at different temperature values to validate the operation of the equipment and considerable improvements were obtained with respect to the old controller.