Study On The Technology And Equipment Of Biomass Straw Carbonization

China is a large agricultural country with abundant straw resources and a wide variety.However,nearly 300 million tons of straw are still directly discarded or burned on site every year,resulting in a large amount of resource waste and environmental pollution.Therefore,efficient utilization of China’s abundant straw resources is of great practical significance for promoting the sustainable development of China’s economy.This project mainly focuses on the research and design of biomass straw continuous pyrolysis and high-value utilization process equipment.The main research results are as follows:(1)Through thermogravimetric experiments,the pyrolysis process of corn straw was analyzed.By analyzing the characteristic parameters of straw pyrolysis under different conditions,and considering the effects of pyrolysis temperature,heating rate,and holding time on the pyrolysis characteristics of straw,it was determined that temperature is the main influencing factor of straw pyrolysis.The optimal pyrolysis temperature for corn straw is 500℃.(2)The continuous pyrolysis and high-value utilization process of biomass is divided into two parts: continuous pyrolysis and extraction of acetic acid.The continuous pyrolysis process mainly includes sealed feed,continuous pyrolysis,two-stage condensation,and spiral condensation for carbon production.The acetic acid extraction process includes the refinement of wood vinegar solution,the extraction of acetic acid,and the preparation of acetic acid with a concentration of 99% through experiments.(3)By studying the process flow,a complete set of equipment for continuous carbonization of biomass straw and high-value utilization of products has been designed.Design,optimize,and calculate the structure of each component of the entire device through Solidworks and CAXA,and conduct three-dimensional simulation assembly to improve the reliability of the entire device.(4)Establish finite element analysis models for carbonization and distillation equipment using ANSYA Workbench.Conduct temperature and stress-strain analysis on the distillation equipment,conduct thermal structural coupling simulation on the spiral shaft and carbonization furnace barrel,to verify the stability and reliability of key components during the operation of the entire device.