Diseño e implementación de un sistema automatizado para el control del equipo purificador de agua FC-L.PIN-22 de la Facultad de Ciencias de la ESPOCH.

Abstract

It was designed and implemented an automated system to control the water purifier of the Faculty of Sciences of the laboratory of industrial processes (FC-L.PIN-22). In order to carry out this process; an electrical scheme; of control, of power, and a mechanical system was established for the installation of the components necessary for automation. The process evaluation was controlled by means of the program developed in a Programmable Logic Controller, (PLC) XINJE XP3-18R, which activates an electro-valve to fill the equipment up to an optimum level determined by a level sensor located in the boiler in order to enhance safety during its operation. The heating resistance of immersion was led by temperature measurement of a PT-100 sensor. It was used an electro-valve for the vent. This electro-valve activates in conjunction with the filler electro-valve to generate a generative flow in the condensation tank, which makes possible to recover steam more effectively. The human-machine interface (HMI) monitored on screen the stages of the process. Automation made possible to improve filling times by reducing the initial water load from 37 liters to 27 liters; enabling to get times from 5.5 to 3.3 minutes, 40% less in the filling stage and from 70 to 40 minutes in the heating stage, replenishing water to the equipment when it is at a low level. This; reduces heating by 42,86%. The recovery of condensed steam is 5 liters every 30 minutes, with an average temperature of 25°C, which improves the thermal efficiency of the equipment from 67% to 82,56%. It was concluded that the implemented system minimizes the time invested to control the different stages of the water purifier, granting the personnel safety. It is recommended to use the equipment in accordance to the user manual, to ensure its correct operation.