Distribution liquid radial spreading coefficients

Hoek [86] proposed a radial spreading coefficient to characterize the liquid distribution. This coefficient is a measure of how quickly a packing can spread a vertical liquid stream radially as the liquid progresses down the column [86]. Radial mixing tends to reduce the effects of... 

Taking into account that the flow distribution is a statistical phenomenon, the distribution of the liquid and phases should be calculated using one and the same differential equation which is Eq. (8-3) of Cihla and Schmidt [6]. The only difference in their distribution is connected with the feet that the motion of the liquid phase is due to the gravity force, and the motion of the gas phase - due to the pressure drop. That is y for one and the same packing, the radial spreading coefficients D for each phase are not equal, and there is no reason to expect them to be equal. 

Besides the coefficient of radial spreading, to characterize the liquid spreading, the distribution width is introduced [142]. This value is connected with a modified Gaussian distribution function and can be obtained also experimentally. 

To ensure uniform distribution over the column cross-section between the liquid distributor and the main honeycomb packing, a special redistribution layer of inclined Raschig rings is mounted. For this layer the packing No 4, Table 7, Chapter 8, with an average coefficient of radial spreading ZN2.64.10 m is chosen. As shown in Chapter 8, part 8.3.4., at the time of the column construction, this packing ensured minimal pressure drop. 

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