Design And Experimental Study Of Biomass Carbonization Furnace Structure

With the dwindling resources of fossil fuels and burning caused serious pollution to theenvironment, raw material alternative energy research as an international research focus,resource-rich Xinjiang is concerned, cotton stalks, rational use of biomass carbonizationtechnology very meaningful.In order to improve the efficiency of utilization of biomass straw, cotton stalks for theexperimental sample, while analysis of the internal structure between the various biomasscarbonization process. In accordance with the principle of energy conservation andenvironmental protection, the design of a thermal biomass straw carbonization furnace, andmade an inspection of their theoretical calculations and actual production. Seeking the optimalprocess conditions in the production process.Specific research contents are as follows:(1) The theoretical analysis of biomass pyrolysis carbonization process, understand thebasic carbonization process of biomass pyrolysis carbonization process. And by analyzing thepros and cons of the ancient and modern biomass carbonization technology, initially identifiedthe basic technology needs of the design of biomass straw carbonization furnace: hot outside,the overall carbonization, intermittent.(2) Design a-do-not-need the straw crushing pressure type directly strapping charringexternal combustion of biomass straw carbonization furnace to determine the basicdimensions of the furnace, the flue gas flow, heating carbonization process. And by theoreticalcalculations and preliminary test study proved subsection external heat biomass strawcarbonization furnace, whether in theory and actual production, can achieve excellent charring. Without consumption outside the outer thermal biomass straw carbonization furnace undercertain conditions, can theoretically rely solely on self-generated heat energy and natural gasheating, continuous carbonization.(3) Carbonized Biomass criteria through single factor test to determine the impact ofcharcoal fixed carbon content and charring specific surface area of the three factors. Found byorthogonal test:90%confidence interval for the charcoal carbonization specific surface area,the final reaction temperature effect is very significant, and the heating rate of the reactionsignificantly affect the general holding time is not significant.(4) In order to find the optimal process optimization by the gradient method. Based onthe the minitab software response surface design, optimum conditions for: final temperatureof650℃, the rate of temperature rise of143℃/h. Holding time4.33h (4hours and20minutes). Learned through testing that27.2%of the the charcoal into carbon ratio obtainedunder the process conditions, the fixed carbon content of83.5%, carbonized specific surfacearea was9.038g/m~2.