The Application Research And Process Simulation Of New Biomass Gasifier And Its Technology System

Biomass energy as one of important new energy sources is widely paid attention to around the world, and biomass gasification is one of important utilization ways of biomass energy.Thermogravimetric analysis was used to study the pyrolysis weightlessness behavior of fast-growing eucalyptus under different heating rate, which are30,50℃/min respectively. It was solved that the dynamics equation of fast-growing eucalyptus and the activation energy of fast-growing eucalyptus which in range of30～50kJ·mol-1. The results show that fast-growing eucalyptus is suitable for gasification because of its low activation energy.The new biomass gasifier and its technology system were designed from the perspective of reducing tar content, improving gas quality, making full use of gas heat and decreasing production cost. The gasification system composed of gas production system, steam generation system and measurement and control system. The key structures and processes in gasification system include the swirl structure in biomass gasifier, cracking tar with high temperature atmosphere, refluxing gas autothermal process, air-steam as gasification agent process and fixed-fluidized compound fold-back structure.The vaporization ability of biomass gasification system was researched with fast-growing eucalyptus as gasification material. When the feed rate is162kg·h-1, the gas yield is1.4m3·kg-1, the low calorific value is10.63MJ·Nm-3, the carbon conversion is85.8%, the gasification efficiency is89.2%, the gasification intensity is2293kg·m-2·h-1.The furnace disk-swirl structure in the biomass gasifier was simulated by solidworks flow simulation. The result shows that furnace disk is the main pressure drop region of furnace disk-swirl structure, and swirl structure makes gas rise with spiral.BP neural network was used to simulate the gasification process in which the gasification data is from miniature biomass gasifier, and the influencing factors in the gasification process were discussed in order to determine the key parameters. Computer simulation experiment was conducted to assess the performance of the proposed procedure. The simulation model is useful for predicting the characteristics of bagasse gasification in practice.