Abstract:

A coupled apparatus of cyclone and granular bed filter/adsorber for dry gas purification, which combined centrifugal separation, filtration and adsorption, was designed to use in a wide range of temperatures and to provide a new means for high temperature gas purification. The static pressure drop between inlet and outlet of the apparatus was measured and investigated on no dust added gas under different granular circulation rates and inlet gas velocities. The result shows that static pressure drop, which dimensionless standard deviation is maintained within 0.4%, has strong stability and predictability over the whole operation process. The static pressure drop is not influenced by granular circulation rate but has a good quadratic (parabola) relationship with inlet velocity. Actual pressure drop can be divided into five parts, namely, five friction losses caused by inlet pipeline, fittings between square and circle ducts, vortex motion, granular bed and outlet pipeline. Correlation equation between the vortex motion friction, the actual pressure drop, and the inlet velocity head was developed. Compared to common cyclone separator, this device has no significant increase in resistance coefficient. The vortex motion effect between cyclone and granular bed was confirmed through preliminary experimental data of operation with added dust, providing a foundation for further optimization.

Key words: gas purification, cyclone separator, moving bed, coupling, pressure drop, adsorption, separation

摘要：

气体干法净化旋流吸附耦合设备将旋流分离和移动床吸附/过滤分离有机结合，可适应较宽的温度范围，为高温气体净化提供了一种新思路。在不加尘及不同的移动床循环速率和旋风入口气速下对该设备进出口静压差进行了测量和分析。实验结果表明，设备静压差在整个运行过程中较为稳定，有较强的可预测性，无量纲标准偏差维持在0.4%以内；实验范围内，移动床循环量的大小对设备静压差没有影响；设备压降与旋风入口气速呈现出良好的二次方程（抛物线）关系；将设备实际压降划分为进口管路沿程摩擦损失、入口天圆地方摩擦损失、旋流体摩擦损失、内置移动床摩擦损失和出口管路沿程摩擦损失五个部分；获得了旋流体摩擦损失及设备实际压降与入口速度头的关联方程；该设备的阻力系数与普通旋风分离器相比，没有明显增大；初步加尘实验确认了旋风壳体与移动床之间旋流作用的存在，为进一步结构优化提供了参考。

关键词: 气体净化, 旋风分离器, 移动床, 耦合, 压降, 吸附(作用), 分离