Diseño e implementación de un intercambiador de calor para secado artificial de particulas sólidas. Caso de estudio: Theobroma Cacao.

Abstract

The present study is to design and implement a rotary dryer batch of solid particles to the Theobroma cacao National CCN51y variety of Ecuadorian origin. The device uses direct heat transfer by forced convection, aiming to eliminate moisture of the product. For the design team first analyzed the initial humidity of the particle cocoa, which provided no uniform shape and size, drying curves determined a final moisture content of 7% were made. The dryer has a cocoa processing capacity 200kg per 8 hours. The maximum temperature (60 ° C) and low (40 ° C), controlled by a thermocouple type "J" displayed on the touch screen. On the touch screen monitors in real time temperature, drum speed, and the inflow of liquefied petroleum gas, driven by a PID control loop by setting the programmable logic controller, S7-1200, that allows a human-machine interface.