MW级谷壳气化发电的操作特性研究

对MW级谷壳气化发电的操作特性进行了研究。主要考查了流化速度及当量比(ER)对气化炉运行温度、压降、气体成分及其热值、气体的产率、谷壳中碳转化率的影响。实验结果显示:流化速度为0.25～0.32 m/s,ER为0.25～0.35时,气化炉运行温度稳定,产生的可燃气体成份的体积百分含量为H2:3.25%～4%, CO:14.43%～20%,CH4:1.84%～3%,C2Hm:0.98%～2.14%;气体的热值:3.1～5.03 MJ/Nm3,气体的产率为1.3～1.98 Nm3/kg,谷壳中碳的转化率为56%～82%。当操作条件为:流化速度0.25 m/s、ER=0.25时,所产生出的燃气对燃气发电机组的运行最佳。

Operational Performance Study of MW-Grade Power Generating System from Rice Husk Gasification

An operational performance of MW-grade electric generation system from rice husk gasification is studied. The effect of fluidization velocity and equivalence ratio (ER) on temperature and pressure drop of gasifier, gas composition and heat value of gas, gas yield and conversion efficiency of carbon in rice husk is investigated, the experimental results indicate that fuel gas, whose heat value is 3.1 to 5.03MJ/Nm3 , yield is 1.3 to 1.98Nm3/kg, and composition is in the range of H2:3.25% to 4%, CO:14.43% to 20%, CH4:1.84% to 3%, C2Hm:0.98% to 2.14%, can be obtained when fluidization velocity is 0.25m/s to 0.32m/s and equivalence ratio is 0.25 to 0.35. The optimal fuel gas is suitable for fuel engine when the operational condition is at 0.25m/s of fluidization velocity and 0.25 of ER.