基于FLUENT软件的下吸式秸秆气化炉模拟研究  

Flow field analysis of down-suction straw gasifier

作　　者：程相文 刘丽智 CHENG Xiangwen;LIU Lizhi(School of Mechanical Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学机械工程学院,河北唐山063210

出　　处：《南方农机》2020年第7期1-2,4,共3页

摘　　要：针对固定床下吸式气化炉产出的气体中可燃气含量少,气体热值低的问题建立二维气化炉模型。基于Fluent软件,气相采用k-ε湍流模型,固相采用DPM模型,在流场模型中耦合化学反应,比较了不同空气当量比对气化炉内最高温度、平均温度以及秸秆燃烧过程的的影响,同时对气化炉内温度场分布进行分析。结果表明,空气当量比在0.24左右时,炉内温度最高时产生的可燃气体含量最高。A two-dimensional gasifier model is established to solve the problems that the content of combustible gas in the gas produced by the fixed-bed downdraft gasifier is less,and the calorific value of the gas is low.k-εturbulence model is used for gas phase and DPM model for solid phase.Coupled with chemical reaction in the flow field model,the effects of different air equivalence ratio on the highest temperature,average temperature and straw combustion process in the gasifier were compared,and the temperature field distribution in the gasifier was analyzed.The results show that when the air equivalence ratio is about 0.24,the highest combustible gas content is produced in the furnace with the highest temperature.

关 键 词：秸秆反应燃烧耦合 温度场 气化炉 FLUENT 

分 类 号：TH164[机械工程—机械制造及自动化]