Mechanistic Study on the Fine-Scale Arch Effect of Moisture Content on the Dense Moulding of Mushroom Pomace Particles

In the dense molding process of shiitake mushroom dregs waste, the existence of the arch effect between particles not only restricts the quality of molded particles, but also increases the energy consumption of production, so it is necessary to explore the reasonable arch effect in the molding process. In this paper, the water content of mushroom pomace as an important factor in the molding process was used as a variable to study the effect of water content of mushroom pomace particles on the internal arching effect of the particle body in the dense molding process at a fine scale. Four water content conditions of 8%, 10%, 12% and 14% were selected in the optimal molding water content interval. The research methodology included closed-end compression experiments and EDEM software simulation experiments. The internal force of bulk molded particles was analyzed by uniaxial compression replica paper indentation method and simulation cross-section method to reflect the strength of the arch effect. The results show that the experimental and simulation results are highly consistent with each other, resulting in the law of the influence of dense molding on the arch effect of mushroom slag particles at different moisture contents (10%>12%>14%>8%), and the law derived from this study is of certain guiding significance for the production of mushroom slag biomass combustion particles.