Stainless Steel Tower Internal

Stainless steel tower internal liquid collector and re - distributor

Usually a complete packed distillation tower has two or more packing layers. A liquid collector and redistributor shall be set between each two packing layers to collect the liquid from the upper packing and redistribute the liquid into the lower packing. Sometimes, the tower has side lines for feeding and discharging, and the tower packing in these parts should be divided into sections. There is a certain limit on the height of each section of tower packing, which is generally equivalent to 15-20 theoretical plates, that should be divided into sections. Therefore, liquid collector and liquid redistributor are indispensable tower internals.

In the down flow of liquid in the tower, there may be uneven distribution, resulting in uneven liquid concentration on the cross section of the tower. The liquid collection redistributor can completely collect and mix the liquid phase with uneven flow rate and concentration, which is beneficial to give full performance regarding to the separation efficiency of the tower. In addition, the rising gas must be evenly distributed in the upper packing, and the resistance is smaller.

Working principle:

The liquid falling from the upper packing is collected by the liquid collecting plate, flows through the lower liquid guide trough and then into the bottom liquid collecting trough in the center. When the diameter of the tower is large, in addition to the center collecting trough, the surrounding ring collecting trough is also set, and the collecting shutter is fixed on the middle horizontal trough and the ring groove. The liquid collected by the liquid collecting plate flows into the horizontal groove and the annular groove, and then flows into the redistributor below through the central tube of the horizontal groove to mix and redistribute the liquid.

General failure analysis and treatment of packed tower:

Liquid collector and re-distributor position and plate size:

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