4 塔设计源文件Aspen V102 T0104 V10塔设计

1.5 塔填料装填与水力学校核1.5.1 塔直径与填料高度的确定塔径的确定应当根据液气处理量，保证塔的操作条件既不会达到液泛，也有较好的传质性能。传统的计算塔径的方法，是根据液泛气速的经验关联式，算出泛点气速，再取一定的系数得出操作气速，从而算出塔径。为提高设计效率和准确性，我们采用的是ASPEN Radfrac模块中的Interactive sizing和Rating功能，其中初步设计使用了Interactive sizing功能，圆整后使用了Rating功能。1.5.2 填料段初步设计为保证填料塔的性能一直处在高效，每46米填料必须分段，并在段间设计液体分布器与液体再分布器。填料选择了Mellapak250Y，通过查阅现代规整填料技术发展状况可以得到等板高度在0.45m左右，根据以上来设计。填料塔设置如下图所示，塔径为软件自动优化给出的塔径，HETP为0.45m进行输入：图6 Interactivesizing设计水力学结果如下图：图7 Interactivesizing水力学结果水力学性能剖面表如下：表1-5 水力学性能剖面表StagePackedheight（meter）% Capacity(ConstantL/V)Liquidvelocity（cum/hr/sqm）Pressuredrop（bar）20.458014.9190.0010951730.9077.528114.08790.0009571541.3569.504511.80310.00072023151.863.805410.33520.00062820262.2563.316810.17720.00062076172.7063.637810.25590.00062525883.1563.949310.34550.00062981493.6064.192610.42080.00063338104.0564.37410.4810.000635994114.5075.209412.27550.000917151124.9575.31512.31880.000920133135.4075.384112.35260.000921883145.8575.424612.3790.000922666156.3075.443112.39980.000922696166.7575.444712.41610.000922147177.2075.433312.42910.000921157187.6575.41212.43940.000919833198.1075.383112.44770.000918258208.5573.405812.13340.000848495219.0073.367912.13890.000846902229.4573.326712.14350.000845228239.9073.283212.14740.0008434952410.3573.237912.15080.0008417222510.8073.191212.15380.0008399222611.2573.143612.15650.0008381062711.7073.095312.1590.0008362812812.1573.046512.16120.0008344542912.6073.114812.17740.0008363133013.0562.570719.41370.000537063113.5068.425521.22840.0006660623213.9570.439921.88680.0007291473314.4072.352222.53110.0007982463414.8574.123.13220.00087063515.3075.635623.66970.0009426923615.7576.935324.13230.001010953716.2077.999324.51810.001072473816.6578.845624.83160.001125473917.1079.50225.08120.001169324017.558025.27710.001204324118.0074.769123.65710.0009231934218.4575.019223.76640.0009352984318.9075.196523.85060.0009441254419.3575.318223.91550.0009503654519.8075.397823.96580.0009546054620.2575.445824.00520.0009573224720.7075.470324.03630.0009588914821.1575.477424.06130.0009596054921.6075.471524.08170.000959686观察填料模拟结果，可以看出，塔径为默认塔径时，全塔的能力因子Capacity均介于0.40.8之间，说明处于填料的良好操作区间之内，符合要求；压降也不大，进一步表明操作状态良好，则填料塔的填料选择较为合适，因此填料的设置是合理的。1.5.3 塔径圆整与水力学校核根据国内塔径制造规定，当塔径大于800mm时，增长区间习惯取100mm，塔径圆整为3.4m时，填料因子大于0.8，不符合设计要求，在塔径3.5、3.6m之间圆整设计，最后将塔径圆整为3.7m，填料因子均符合设计要求，填料尺寸不变，填料塔具体设计如图：图8 圆整后填料塔设置（rating）各段填料层的高度分别为4.05m、4.05m、4.95m、4.5m、4.05m，总填料高度为21.6m，段间设置液体再分布器，所得水力学校核如下：水力学性能剖面表如下：图9 圆整后水力学校核（Rating）表1-6 水力学校核结果图StagePackedheight（meter）% Capacity(ConstantL/V)Liquidvelocity（cum/hr/sqm）Pressuredrop（bar）20.4579.451714.81680.0010626630.9076.996713.99130.00093359741.3569.028111.72220.00070928251.863.368110.26440.00062047162.2562.882810.10750.000613272.7063.201710.18560.00061757783.1563.51110.27460.00062201693.6063.752710.34940.000625492104.0563.932810.40920.00062804114.5064.062610.45620.000629816124.9564.152710.4930.000630974135.4064.211410.52180.000631645145.8564.24610.54430.000631939156.3064.261710.5620.000631942166.7564.263110.57590.00063172177.2064.253410.5870.000631329187.6564.235210.59580.000630809198.1064.210710.60290.000630193208.5564.181210.60860.000629504219.0064.14810.61340.000628762229.4564.11210.61740.000627981239.9064.07410.62090.0006271732410.3564.034310.62380.0006263452510.8063.993510.62650.0006255032611.2563.951910.62880.0006246542711.7063.909710.6310.00062382812.1563.86710.6330.0006229442912.6063.926710.64710.0006238053013.0554.707716.9740.0004271913113.5056.391417.49490.000453893213.9558.051518.03750.0004819543314.4059.627518.56850.0005105943414.8561.067919.06390.0005386393515.3062.333419.50680.0005649393615.7563.404519.88810.0005885833716.2064.281420.20610.0006090123816.6564.978820.46440.0006260443917.1065.519820.67010.0006398074017.5565.930220.83150.0006506314118.0066.235120.95690.0006589434218.4566.456621.05370.0006651924318.9066.613721.12830.0006697944419.3566.721421.18580.00067310