Simulation Studyon Temperature Distribution Of Biomass Compact Forming

At present,my country’s energy structure is dominated by non-renewable energy sources such as coal,oil,and natural gas,supplemented by renewable energy sources such as wind energy,solar energy,and nuclear energy.With the development of science and technology,energy shortage is the thorny problem we have been facing.Due to the limited reserves of fossil energy,vigorous exploitation will be exhausted,and the development and utilization of biomass energy can effectively alleviate the current situation of resource shortage.Therefore,how to develop and utilize biomass energy is the primary task we are facing now.This paper analyzes the compact molding mechanism of biomass and the heating temperature during compression,and uses ANSYS Workbench software to simulate the temperature field distribution of the molding fuel in the transition stage.Assuming that the molded fuel has a certain density,ignore the friction,and apply temperature loads of 100℃,150℃,200℃,250℃,and 300℃,respectively,and simulate the internal temperature distribution of the molded fuel at different times,and obtain the temperature change at each time.law.In order to further study the internal temperature change of the molded fuel,three key positions are selected,and the temperature changes of the key points of each position are studied and analyzed,and the temperature change law at each moment of each key position is obtained.By introducing the temperature calculation results of the molded fuel into the Static Structural project,the thermal stress-coupling simulation study of the molded fuel was further conducted,and the influence of the thermal stress and strain on the quality of the molded fuel under different temperature loads was compared and analyzed.The results show that during the compact molding of biomass,when a lower temperature load is applied,the surface of the shaped fuel has reached the minimum softening temperature of lignin,and the lower internal temperature is not easy to form;when a higher temperature load is applied,the surface of the shaped fuel will burn.Coking phenomenon,the heating temperature is the best in the range of 200℃-250℃,biomass particles are easy to form and good quality;and the temperature change curve analysis of each key point can be seen that the time-temperature relationship is linear during the heating process,Position 1 is close to the outer surface of the shaped fuel,and the temperature rises fastest,followed by the slower temperature rise of position 2,and the center of the shaped fuel at position 3 is slower and unevenly heated.The temperature change at each position will affect the quality of the shaped fuel;The thermal stress is mainly concentrated on the two ends of the shaped fuel,and the deformation mainly occurs on the surface of the shaped fuel.As the temperature increases,the stress and strain will also increase.The temperature is in the range of 200℃-250℃.The quality of the molded fuel has little effect.