Structural Design And Research Of Wood Pellet Raw Material Shredder

Nowadays, People continue to explore and make efforts to find new energy because ofincreasingly serious resource consumption and environmental disruption. New energy such aswind energy, solar energy, biomass energy, geothermal energy has emerged one after another.Biomass energy has the most large-scale industrial development in these kinds of new energy.As an important filed of biomass energy conversion, wood pellet has following characteristics:moderate density, high calorific value, full combustion, low cost, easy to use and clean. Its mainraw materials are three residues of forest, crop stalks and other wooden materials which comefrom anywhere. These materials have many varieties of irregularity shapes, high moisturecontent, and different grade, so in the preparation stage, we should crush these raw materialsinto particles or chips to prepare for the next process.In order to meet the wood pallet fuel production requirements, we design a new shredder withwide adaptability.The main purpose of this project is to design a new type fine forest biomass crusher, withbroad applicability, which could shred many varieties of irregularity shapes of raw materials forwood-pellet production. The main research and findings are as follows:1) This paper introduces the basic structure and working principle, hydraulic pusherdevice’s working theory, cutting units and discharge screw conveyor, as well as majorcomponents of technical parameters of design.2) Design a new cutting roller, which can effectively reduce cutting vibration, reduceequipment energy consumption and prevent heat generation. High wear resistant rotorsand special material cutting knives to reach shredders sharp shredding and high wearresistant. Knives can be replaced quickly by revolving bolts, revolving knifes directionand fastening to realize reuse knives.3) Low speed design, rotate stably and lower energy consumption. Hydraulic pressureinching propelling materials to make material feed stably without blocking. Highwear-resisting screen mesh.Shredded material size can be adjusted by changingdifferent screen meshes holes. Discharge automatically with screw conveyor andmaterial will not be blocked.4) Based on the MATLAB6.5, the paper further optimized the large inertia cutting roller.After optimized, the weight of roller reduced7.36%. It also reduced the manufacturingcost of the key components and saved energy consumption. The structural finiteelement analysis of cutting units is carried out by SolidWorks Simulation to verify thesafety and reliability of the design.5) Operating materials can include softwood, hardwood, MDF, particleboard, variety ofwood waste, pallets, plate edge, bark, waste wood-based panels, cement templates,waste veneer, boxes, and so on.The shredder can meet the requirements of woody biomass grinding and this design canprovide a reference for improving crushing equipment and the technical support in large-scaleuse of forest biomass energy.