Research And Development Of Exhaust Heat Assisted Far IR Rice Drying Equipment In Combine Harvester

In order to solve the problem of grain drying in the vast rural areas of China, improve the utilization rate of agricultural machinery and expand a new function of combine harvester. This paper explored an efficient and high quality grain drying technology with low energy consumption and low cost.Through the analysis of the typical working condition and whole structure of combine harvester, this paper studied a rice multistage drying system in combine harvester with exhaust heat to assist far infrared. Which combined with the internal combustion engine waste heat utilization and rapid drying technology. The overall structure of the drying system in combine harvester is determined. According to the overall program requirements, the paper made a general design for indoor exhaust heat assisted far infrared rice drying test bench. According to the actual production requirements, the energy consumption analysis of the drying equipment was carried out. The overall consumption of gas and heat has been determined. The main working parameters of the drying equipment were determined. According to the determined working parameters, this paper detailed designed the main structure of the experiment table, including the first stage of hot air assisted far-infrared united screw conveyor drying device and the second stage of far infrared combined with hot air room drying device. The paper set up three dimensional modeling and completed the trial manufacture of partial prototype.In the end, CFD software and porous medium theory were used to simulate the temperature distribution of rice after rice through the first stage of far-infrared convection drying device. Finally, the infrared radiation temperature and the convective wind velocity is determined. The energy of two stages radiator were fairly distributed. The results show that the test scheme is feasible.