大流量立式径向流吸附器分层并联均布方法研究

发布时间：2018-03-07 04:00

本文选题：分层并联　切入点：径向流吸附器　出处：《浙江大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着世界经济的高速发展,钢铁、冶金、化工等诸多工业领域对氧、氮等工业气体的需求急剧增长。未来需要更大规模、更高效的低温空分系统来适应这个趋势。在低温空分过程中,吸附纯化环节对整个系统的安全运行意义重大。如何进一步提高吸附器的空气处理量和吸附颗粒利用效率,是目前制约空分系统大型化和低能耗化发展的一大障碍。然而,立式径向流吸附器具有占地面积小、床层压降小、再生能耗低等优点,在国内外大型和超大型空分系统中得到了广泛应用。改进立式径向流吸附器的结构,优化其流场分布,则是实现吸附系统大型化和高效化的有效途径。为此,本文开展了以下研究工作：(1)为降低径向流吸附器高度对均布的影响,提出了径向流吸附器的分层并联设计方法,设计并加工了分层并联吸附器,对其内部流体压力场的分布进行了测量。(2)建立了径向流分层并联吸附器的数值计算模型。应用了计算流体力学方法,对分层并联式径向流吸附器中流体在床层内的流场进行了数值模拟计算,并在相同条件下与普通结构后的径向流吸附器的流场分布进行对比。结果表明,分层并联结构呢的均匀度相比于普通结构的均匀度提高了80%,有效清除了径向流吸附器过高对床层内流体均布的负面影响。(3)对分层并联径向流吸附器的多个结构参数进行了优化,使其均匀度更好,吸附颗粒利用率更高；并对分层并联方法与其他均布方法的耦合进行了探讨。
[Abstract]:With the rapid development of the world economy, iron and steel, metallurgy, chemical and other industrial fields of oxygen, nitrogen and other industrial gas demand rapid growth. The future needs of larger, more efficient cryogenic air separation system to adapt to this trend. In the low temperature air separation process, adsorption and purification aspects of major significance to the safe operation of the whole system. How to further improve the adsorber air handling capacity and adsorption efficiency of particles, is currently a major obstacle for the development of the consumption of air separation system in large scale and low energy. However, the vertical radial flow adsorber has the advantages of small occupied area, the bed pressure drop is small, low regeneration energy consumption, has been widely used in domestic and foreign large and super large the air separation system. Improving the structure of vertical radial flow adsorber, optimize the flow field distribution, is the effective way to realize the large-scale and efficient adsorption system. Therefore, this paper carried out the following research Research work: (1) to reduce the radial flow adsorber to uniform, put forward a hierarchical parallel design method of radial flow adsorber, design and processing of parallel layered absorber, the distribution of internal fluid pressure field were measured. (2) we present a numerical simulation model of radial flow adsorber stratified parallel. The application of the method of computational fluid dynamics, flow field of the layered parallel radial flow adsorber in the fluid in the bed of the numerical simulation of flow field, and under the same conditions with the common structure after radial flow adsorber were compared. The results show that the uniformity of the layered parallel structure compared to the general structure of the uniform raise the degree of 80%, effectively remove the high uniform radial flow adsorber on fluid bed negative impact. (3) a number of structural parameters of the layered parallel radial flow adsorber was optimized, which are The evenness is better and the utilization ratio of the adsorbed particles is higher, and the coupling between the layered parallel method and the other uniform method is also discussed.

【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TQ116.11

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