不同浓度分散性煤粉对核电厂碘空气过滤器性能的影响
Influence by small dispersive coal dust particles of different fractional consistence on characteristics of iodine air filter at nuclear power plant
摘要：
研究的主要目的是确定分散的不同分数浓度的小煤尘颗粒对核电厂立式碘空气过滤器技术特性的影响。在模拟空气动力条件与实际空气动力条件相近的情况下，研究了分散性煤粉小颗粒在立式碘空气过滤器吸收体颗粒过滤介质中的输运特性。结果表明，在空气粉尘气溶胶流的作用下，分散性小煤尘颗粒出现不同的分数浓度，其尺寸减小到微米和纳米级，通常会导致立式碘空气过滤器中吸附器颗粒过滤介质中分散性小煤尘颗粒质量分布的显著变化，改变了立式碘空气过滤器的空气动力学特性。完成了立式碘空气过滤器模型的空气动力学阻力的精确表征。并对立式和卧式碘空气过滤器的技术特点进行了对比分析。
英文摘要：
The main purpose of research is to determine the influence by the small dispersive coal dust particles of the different fractional consistence on the technical characteristics of the vertical iodine air filter at nuclear power plant. The research on the transport properties of the small dispersive coal dust particles in the granular filtering medium of absorber in the vertical iodine air filter is completed in the case, when the modeled aerodynamic conditions are similar to the real aerodynamic conditions. It is shown that the appearance of the different fractional consistence of small dispersive coal dust particles with the decreasing dimensions down to the micro and nano sizes at the action of the air dust aerosol stream normally results in a significant change of distribution of the small dispersive coal dust particles masses in the granular filtering medium of an absorber in the vertical iodine air filter, changing the vertical iodine air filter aerodynamic characteristics. The precise characterization of the aerodynamic resistance of a model of the vertical iodine air filter is completed. The comparative analysis of the technical characteristics of the vertical and horizontal iodine air filters is also made.
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