MODIFIKASI SALURAN UDARA CONTINUOUS VIBRATING FLUIDIZED BED DRYER & PENGUJIAN PADA TEMPERATUR KERJA 50°C

Abstract

MODIFICATION OF THE AIR DUCT CONTINUOUS VIBRATING FLUIDIZED BED DRYER&TESTING IN TEMPERATURE WORK 50°C Continuous Vibrating Fluidized Bed Dryer (CVFBD) is a dryer that using fluidization principle with addition of vibration system from motor vibro, it can be minimized the air speed. In the drying process, the heat source was came from gas fuel LPG (Liquified Petroleum Gasses) that environmentally friendly. CVFBD has lack of uneven airflow distribution so the device performance is not maximal, then it is required modification on the air duct. The process modification in some parts of CVFBD is : adding a funnel, adding a baffle, and narrows the air output on the outflow of material. The air flow rate test on the bed is performed to determine the most optimal airflow distribution by varying the angle of the baffle, then testing CVFBD performance after modified need to be done to know its performance. The result obtained from airflow rate testing and performing testing of CVFBD is : the most optimal airflow distribution lies in the slope of the baffle angle 1 for 70°, baffle 2 for 75° and baffle 3 for 75°, with deviation value of 0,44. 0,5 kg of celery leaves required a drying time of 132 minutes at 50°C to produce 0,0658 kg of dried celery leaves with water content of 13,16% and required 1,36 kW of electric power. Keyword : Dryer, vibrating, CVFBD, celery leaves, airflow