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变压吸附塔结构尺寸对塔内气体浓度梯度变化与混合气体分离效果具有重要影响。通过建立沟流效应模型与壁效应模型,分析计算压力梯度变化的均衡性,掌握吸附塔内甲烷气体的径向与轴向浓度变化特征,揭示甲烷气体变压浓度梯度变化规律,明确吸附塔内甲烷气体变压浓度梯度与吸附塔尺寸之间的对应关系,从而为氮气与甲烷分离变压吸附塔最优尺寸设计提供技术支持,最终为研制低浓度煤层气变压吸附浓缩装置奠定基础。
The structure size of the pressure swing adsorption tower has an important influence on the gradient of the gas concentration in the tower and the separation effect of the mixed gas. Through the establishment of the channel effect model and the wall effect model, the equilibrium of the pressure gradient is analyzed and calculated, the radial and axial concentration characteristics of the methane in the adsorption tower are grasped, and the variation rules of the methane gas pressure gradient are revealed. Methane gas pressure gradient concentration gradient and adsorption tower size between the corresponding relationship between the nitrogen and methane separation and pressure swing adsorption tower optimal size design to provide technical support and ultimately lay the foundation for the development of low concentration of methane pressure swing adsorption enrichment device.