The internals of the tower provide the contact place for mass transfer and heat transfer for gas-liquid phase and liquid-liquid phase; There are two main types of tower internals: packed tower and plate tower. The internals of packed tower mainly include packing, liquid distributor, liquid collector redistributor, gas distributor, packing fastening device and packing support device; The internals of tray tower mainly include tray, liquid collecting tank (tray tower), tray support device (tray tower), feed distributor, gas feed and distribution device and demister, etc.

A complete packed tower is composed of internals, packing and tower body. The function of tower internals is to make gas-liquid contact better in the tower, so as to give full play to the production capacity and efficiency of packed tower. Therefore, the design of tower internals directly affects the operation and performance of the whole packed tower. In addition, the "amplification effect" of packed tower is not only the inherent factors of packing itself, but also the influence of tower internals.

Tower internals mainly include the following parts:

1、 Liquid distribution device

2、 Packing press

3、 Packing support device

4、 Liquid collection and redistribution and feeding and discharging device

5、 Gas feeding and distribution device

6、 Defoaming device