生物油部分供氧气化试验研究与数值模拟

THE EXPERIMENTAL AND NUMERICAL SIMULATION STUDY ON PARTIAL OXYGEN GASIFICATION OF BIO-OIL

采用小型实验装置和计算机数值模拟研究当量比和反应温度对生物油气化产物的产率、组成及碳转化率的影响,获得在O2和N2两种氛围下气化反应器内速度场和温度场的分布情况。结果表明:在相同气化温度下,CO2产率随O2当量比的增大而增加,最高可达447.72 m L/g;可燃气体产率随当量比的增大而减少并趋于稳定;碳转化率随当量比的增大先减少后增加,最高可达93.92%;生物油气化气体的产率随气化温度的升高而增加,且模拟值与实验值吻合较好,其中CO2含量及产率的实验值与模拟值的平均相对误差达到最小值,分别为24.74%和33.72%。

In this paper, the effects of the equivalence ratio （ER） and the reaction temperature on the gasification gas were studied, especially on the gas yield, the composition of the gasification gas and the carbon conversion rate. In the meantime, the velocity and temperature distribution of the gasification reactor in two kinds of atmosphere conditions （oxygen and nitrogen） were obtained. The result showed that the yield of COs increases with the increasing of the oxygen ER in the same gasification temperature conditions, and the highest yield are 447.72 mL/g; the yield of the combustible gases decreases with the increasing of the ER, and tend to be stable with the higher ER; the carbon conversion rate, firstly decrease and then increase with the increasing of the ER, and the highest rate are 93.92%. The yield of the gasification gas increases with the increasing of the temperature. The result of the numerical simulation is in good agreement with the experimental data, the average value of the relative error between the experimental and numerical simulation of the volume content and the yield of CO2 are the minimum value 24.74% and 33.72%, respectively.