Design And Simulation Research On Biomass Plane-die Briquetting Machine

Fossil energy is a supporting energy in the development of modern society. It gives much devotion to human's development, but also threatens our living and development. Biomass energy, as a new type of renewable energy, has became one of the effective ways to solve the energy crisis and protecting environment. There is abundant biomass energy in china but the availability is comparably low and the utilization technique is underdeveloped, which lead to much waste of biomass energy. Biomass briquetting is one of the key techniques in reasonably using of biomass resource. Therefore the study of biomass solidifying can not only push the development of energy construction, but also has deep meaning in energy saving and emission reduction.The paper, based on the key project in Hei Longjiang "develop of key device of straw briquetting fuel", taking the biomass straw as object, analyzes the influence of the main factors to density, output and energy consumption, including the raw material type, granularity, water content, and compress ratio. By the ring-die's mechanical model, a mechanical model for flat-die is developed and set up; according to the design requirement, flat-die roller briquetting model and the transmission plan and main parameters is fixed on the basis of the advantage and disadvantage of all the machines. A biomass fuel briquetting machine is designed, which is in low energy consumption, high output, long lifetime, and high density in fuel. The introduction of layered flat-die design means effectively reduces the material cost of flat-die.Abrasion of the main components in the machine has always be paid attention to by the researchers, also one of the difficulties in research. Normally the research starts from improving the material's character, in this paper, based on basic principles of work and power principle, this paper starts from the speed difference between roller and flat-die at the tangent point, analyzes the abrasion, and reach the conclusion that the dislocation abrasion is caused by speed difference; through modeling and theoretical derivation the evaluation formula of abrasion effect is worked out; in the last, with computer programming, numerical processing and graph generating based on MATLAB, it analyzes the effect to total dislocation by different roller axis inclination and offsets. The conclusion is:Appropriate increasing of roller axis inclination and decreasing offsets can effectively reduce the dislocation abrasion.Loading on inner face of the die's holes is very important to the strength of inner hole. Making stimulation analysis of loading to biomass briquetting machine flat-die hole by PRO/MECHANICA, it shows the inner hole displacement and stress is in contmual change in small range, and the displacement and maximum stress follows the loading in unitary. And it also affects the life of roller that the friction heat cannot be effectively transmitted.it takes steady state thermal analysis of the roller by ANSYS, and comes to that by replacing the middle closed air layer with material in good heat transmission more heat from frication can be transmitted into the cooling water, so that it can decrease the temperature in roller and the main shaft, reduce the abrasion and extend the lifetime.