Study On Optimization Of Biomass Fuel Pressure Formation Process Parameter

As a renewable resource the biomass is inexhaustible. But it has some disadvantages, such as low density and difficult transportation which limit recovery and utilization. Biomass briquetting technology which recycles the waste biomass and briquets into briquetting densification fuel makes it convenient to transport and store.It meets the sustainable development of basic national policy, and avails to the development of biomass resources.Study was deeply carried out on the structure of biomass ring molded block machine and ANSYS Workbench was used to simulate the stress condition in the shaping process including change trend of stress and strain, relationship between chamfering and stress, as well as strain. Optimization was done for the ring molded structure relying on the simulation results, and safety coefficient was obtained after analyzing the mold fatigue condition before and after optimizing. The optimal parameters were studied through laboratory experiments, and the mechanism of biomass molding and the effects of water content, particles size and molding pressure were also analyzed in the molding process. The simulation results show that there are stress and strain local concentration phenomenon generally in the mould, leading the mould damaged most seriously in the corresponding region. After dealing with mould chamfering, strain and stress concentrated region decreases as the radius of the die hole chamfering increasing, and the optimizing effect is best when the die hole chamfering approaches circle. The experiment results show that the optimum technology parameters are 15% of moisture content, particle size between 0mm and 20 mm, pressure between 15 MPa to 25 MPa.Through the structure optimization of the mold and confirming the best parameters of moulding techniques, the lifetime of the mold extends, production efficiency improves, and the production cost reduces, which not only contributes to good economic benefits, but also make the social benefit and ecological benefit remarkable. It is conducive to the development and utilization of the biomass resources and sustainable development.