Implementación de un sistema de control (temperatura y presión), para el proceso de liofilización en el laboratorio de procesos industriales de la Facultad de Ciencias.

Abstract

In this work, it was developed a control system and monitoring in order to perform the lyophilization process in the Industrial Processes Laboratory of the Faculty of Sciences. The heuristic method was applied to find possible errors of the previous system giving an alternative of solution. The necessary parameters for the lyophilization of products were identified which were determined by reference to the characteristics of design and construction of the equipment. The technical condition of the machine was verified in order to establish the operating conditions, of which small adjustments were made. In the design and implementation of the control system was proceeded to the configuration and programming of programmable logic relay (LOGO), which processes information received from the temperature and pressure sensors according to the scheduling commands to activate or deactivate the resistance or the pump, and then programming the human-machine interface (HMI), using the Ethernet interface for communication between the LOGO and the HMI. The software (TIA Portal) was used for the visualization and friendly monitoring between the user and the equipment. The results obtained from the implementation of the system determined that the time spent to perform the lyophilization process was reduced in 30 minutes. In conclusion, the efficiency of the lyophilization process before and after the implementation of the control system was greater in a 6.83%, due to the reduction of the time spent by the operator thanks to the control and stabilization of the temperature entered, in addition to the reduction of the energy consumption of the vacuum pump supplying the necessary amount in the interior of the chamber. It is recommended that at the time of the process the equipment is hermetically closed which will allow the obtaining of a final quality product.