Diseño de un secador de bandejas para el secado de maíz, quinua y amaranto en la Hacienda San Jorge.

Abstract

Design a tray dryer for drying and dehydration of quinoa, amaranth and com corn to San Jorge farm. It is located in the Chimbo canton, San Vicente community, km.2.5 South Pan-American Highway, to meet the needs it has for the preservation and sale of their grain to market. They have grown as entrepreneurs and optimized the drying time and improve internal production. Data collection was performed in a dryer prototype that has School of Chemical Engineering in the Laboratory of Industrial Process. We identified that each grain meets to fit for human consumption in accordance with INEN standard (2012:07); (1888:06) ;(1995:10), weighing 0,26 kg on aluminum foil of each material, then placing them in each dryer trays with test temperature of 50 0C and 60 0C, taking every two hours the moisture loss material having far. At the end, it is obtained experimental data which serve as the basis for identifying variables such as temperature, time speed, pressure. They are observed through various drying curves presented both as a function of humidity vs. time and speed vs. humidity. The selected construction material is Steel AISI 304; the thermal insulator is glass wool and a device that allow us to control the temperature during the drying process. Therefore, the equipment is technically discontinuous drying with 6 trays. The load capacity is 21 kg / per tray, it means that the total load is 126 kg load. The outer dimensions of the equipment are 2,50 m long 1,70 m wide, 2,00 m high and 2,44m inside long, 1,68 wide and 1,80 high, with a sensible heat 115,36 BTU/Lb.an air volume 38,75 m3/h and a total heat quantity of 178,76 kcal. The drying time is 42 to 36 hours at a temperature of 60 0C, with an initial moisture of 32, 11%; 25, 28 % and 26, 32% and a final moisture content of 14, 2%; 8, 1% and 10, 0%. The proposed design of this team is thinking about maximizing production drying of San Jorge Farm, hoping that its constriction is carried out in the shortest possible time and can meet the needs as entrepreneurs.