CAJ | 학술논문

梯度链条式生物质气化炉按照气化规律从空间上将生物质气化过程分为4个阶段，可实现对各气化阶段气化条件进行控制。为此，对梯度链条式生物质气化炉进行数值模拟，通过改变ER ，计算出不同 ER 下床层顶部各组分的温度和浓度分布及炉膛气相的气化特性。模拟结果显示：气化合成气出口温度622．24℃；气化合成气中CO为13．81％、CH4为3．26％、C2H4为0．601％、C2H6为0．002％、CnHm为10．936％、H2为3．82％；碳转化效率为75．1％，低位热值为5501 kJ／Nm3，气化效率为57．56％。该气化效果比下吸式固定床气化炉、固定床气化炉及鼓泡床气化炉空气气化效果好。
제도련조식생물질기화로안조기화규률종공간상장생물질기화과정분위4개계단，가실현대각기화계단기화조건진행공제。위차，대제도련조식생물질기화로진행수치모의，통과개변ER ，계산출불동 ER 하상층정부각조분적온도화농도분포급로당기상적기화특성。모의결과현시：기화합성기출구온도622．24℃；기화합성기중CO위13．81％、CH4위3．26％、C2H4위0．601％、C2H6위0．002％、CnHm위10．936％、H2위3．82％；탄전화효솔위75．1％，저위열치위5501 kJ／Nm3，기화효솔위57．56％。해기화효과비하흡식고정상기화로、고정상기화로급고포상기화로공기기화효과호。
According to the biomass gasification discipline, biomass gasification process is divided into four stages in gra-dient chain biomass gasifier.Thus can control gasification conditions in different gasification stage.Mathematical modeling methods have been employed to simulate a gradient chain biomass gasifier, not only the temperature, concentra-tion distributing of the top of bed in different conditions, but also gasification character of gasifier chamber were calcula ted, by varying the ratio of actual air fuel ratio and stoichiometric air fuel ratio( ER) .The results showed that the tem-perature, concentration distributing( CO, CH4 , C2 H4 , Cn Hm , H2 ) , carbon conversion efficiency, HLV of the gas fuel, gasification efficiency vary in the range of 622.24℃,CO 13.81%,CH4 3.26%,C2 H4 0.601%,C2 H6 0.002%,Cn Hm 10.936%, H2 3.82%, 75.1%, 5501 kJ/Nm3 , 57.56%, and this effect of gasification better than downdraft fixed bed gasifier, a fixed-bed gasifier and bubbling bed gasifier.