共查询到18条相似文献,搜索用时 31 毫秒
1.
2.
3.
4.
5.
规整填料的气液分布器 总被引:4,自引:0,他引:4
讨论了液体分布不均对填料分离性能的影响,并全面介绍规整填料的气液分布器的有关结构和计算(包括若干新型的分布器),可供设计和企业进行规整填料设计时参考,以确保填料塔正常操作。 相似文献
6.
7.
在φ600mm的填料塔内,分别装填38mm塑料矩鞍和共轭环Ⅱ型、50mm陶瓷矩鞍和阶梯环四种填料时,研究了单相和两相逆流两种情况下液体分布规律。物系为空气-水。实验发现,塔中液体分布具有一定的规律性,几何结构越开放、d_c/d_p越小、气相流速越大,则壁流越严重。气速进一步增大,将导致液体的不均匀分布。在实验范围内系统达到平衡时,模型计算值与实验值吻合良好。 相似文献
8.
9.
将填料单元处理成立体节点网,根据节点网内网线液流和节点液流各自的运动方式建立了填料单元的液体分布模型.通过将填料与塔壁间的液体交换规范成填料节点网与塔壁节点网间的液量传递建立了填料单元对应塔壁区的流体分布模型.提出了规整填料塔液体分布问题的边界条件.2个描述填料单元及其对应塔壁区液体分布的数学模型与2类边界条件共同构成了波纹板规整填料塔的液体分布模型.采用单纯形法对3个模型参数进行了估计.模型计算结果与实验数据一致,表明模型能合理地描述波纹板规整填料塔的液体分布性能. 相似文献
10.
11.
12.
填料塔常用的液体分布装置 总被引:1,自引:0,他引:1
本文对填料塔常用的液体分布器进行归纳和分类,介绍了它们的特点和适用场合;提供了判断一个分布器分布质量好坏的判据,并对今后液体分布器的发展趋势加以了预测。 相似文献
13.
X-ray tomography is used to characterise the liquid distribution in a 0.6 meter diameter and 2 meter height column filled with gas-liquid absorption polypropylene packing elements (Cascade Mini-Ring 1A, Glitsch Benelux). The liquid holdup distribution is determined for Uquid flowrates ranging from 1000 l/h to 6000 l/h, that correspond to superficial velocities ranging from I0-3 to 6 10-3 m/s, in several cross sections situated at different heights in the packed column.
A characteristic length, corresponding to the smallest scale beyond which the packing properties may be supposed statistically homogenous and isotropic, is determined by means of the autocorrelation function method applied to the images of the solid distribution.
Both local and global liquid holdup measurements are satisfactorily modelled by means of a partial wetting model based on a probabilistic approach. 相似文献
A characteristic length, corresponding to the smallest scale beyond which the packing properties may be supposed statistically homogenous and isotropic, is determined by means of the autocorrelation function method applied to the images of the solid distribution.
Both local and global liquid holdup measurements are satisfactorily modelled by means of a partial wetting model based on a probabilistic approach. 相似文献
14.
用φ15mm的陶瓷拉西环和塑料鲍尔环填料,在内径153mm的有机玻璃塔内,采用空气-水体系,测量了气液向下并流流动时的持液量数据。以Bemer等人提出的颈缩管模型为基础,推导了向下并流填料塔内的持液量计算式,较好地关联了本实验和Dodds等人的结果。并检验Larkins,Charpentier,佐藤等人提出的持液量关联式。 相似文献
15.
本文探讨了填料塔中液体微观流动机理,提出了多区多级模型,对填料塔在非理想流动状况下的塔效率进行了模拟。通过计算曲线,直观地表示出液相不均匀分布和汽相横向混合对填料塔当理理论塔板数的影响。本文提供了一种计算真实填料塔效率的方法。 相似文献
16.
气液并流填料塔的持液量 总被引:2,自引:0,他引:2
本文提出用静持液准数E对文献及本试验静持液数据进行关联;在受力分析基础上得到单相持液的半经验关系式,使用范围及精度均比文献值有所提高。对脉冲流区后的动持液量提出了单独的经验关联。 相似文献
17.
Supercritical fluid distribution in a packed column was investigated by measuring the weight loss of a solid in coaxial cylinders where the fluid passed through. Two criteria to make the equilibrium distribution be uniform were suggested: (1) the ratio of the column diameter to the particle diameter is at least 10, and (2) the particle layers are larger than 40 when a point source is used. The radial diffusion model was found to be applicable to describe the flow in a packed column under supercritical operations. The spreading coefficients in this model were evaluated and were observed to be dependent on particle size and flow rate. A correlation is proposed for predicting the spreading coefficients which gives a deviation smaller than 3.0%. 相似文献