Numerical Simulation and Experimental Research of Pneumatic Drying on Biomass Fuel
Based on the mechanism of mass and heat transfer of the particles and air in drying tube,the mathematics model of pneumatic drying process was established which referred to straw fuel in straight horizontal tube.Using MATLAB program the equations were solved to present the simulating results.Test bed of pneumatic drying was established,the test results were summed up by single-factor test.It has been found that the simulating results were consistent with data derived from single-factor test,and the pneumatic drying process was divided into two parts which were high-speed drying rate area and slow drying rate area.The effects,including initial water content,hot air temperature,mass of hot air and materiel,on biomass humidity were investigated,in which the most important factor on gas flow drying of straw fuel was the mass flow rate of hot air.The drying effect will be improved with hot air temperature and mass of hot air and material increasing.However,a high initial water content will make the drying effect decrease.