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首页> 外文会议>17th Anniversary of the International Simulatros Conference, Apr 16-20, 2000, Washington, D.C. >SPEEDUP~(TM)ION EXCHANGE COLUMN MODEL
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SPEEDUP~(TM)ION EXCHANGE COLUMN MODEL

机译：SPEEDUP〜（TM）ION交换塔模型

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摘要

The Savannah River Site (SRS) is studying non-elutable ion exchange using crystalline silicotitanate (CST) as a potential replacement for the In-Tank Precipitation process to remove Cesium from SRS soluble radioactive waste. A transient model to describe the process of loading Cesium onto the granular fixed bed in an ion exchange (IX) column has been developed using the SpeedUp~(TM) software package. SpeedUp~(TM) offers the advantage of smooth integration into other existing SpeedUp~(TM) flowsheet models. The mathematical algorithm of a porous particle diffusion model was adopted to account for convection, axial dispersion, film mass transfer, and pore diffusion. The method of orthogonal collocation on finite elements was employed to solve the governing transport equations. The model allows the use of a non-linear Langmuir isotherm based on an "effective" binary ionic exchange process. The SpeedUp~(TM) IX column model was tested by comparing to the analytical solutions of transport problems from the ion exchange literature. In addition, a sample calculation of a train of three CST IX columns was made using both the SpeedUp~(TM) model and Purdue University's VERSE-LC code. This paper summarizes the model development and verification assessment.
机译：萨凡纳河站点（SRS）正在研究使用结晶硅钛酸盐（CST）进行的不可洗脱的离子交换，以替代罐内沉淀工艺以从SRS可溶性放射性废物中去除铯。使用SpeedUp〜（TM）软件包已开发出一个瞬态模型，用于描述将铯负载到离子交换（IX）色谱柱中的颗粒固定床上的过程。 SpeedUp〜（TM）具有将其平滑集成到其他现有SpeedUp〜（TM）流程图模型中的优势。采用了多孔粒子扩散模型的数学算法来计算对流，轴向扩散，膜质量传递和孔扩散。采用有限元正交配置法求解输运方程。该模型允许基于“有效”的二元离子交换过程使用非线性Langmuir等温线。通过与离子交换文献中有关迁移问题的解析解进行比较，对SpeedUpTM IX色谱柱模型进行了测试。另外，使用SpeedUpTM模型和普渡大学的VERSE-LC代码对三列CST IX列进行了样本计算。本文总结了模型的开发和验证评估。

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