Tower refers to the equipment used to carry out physical processes
such as separation or absorption, and change the composition of gas
or liquid complex mixture. Also known as "tower equipment". The
ratio of height and diameter is large, and there are certain
accessories inside and outside the tower. The internals are used to
make the gas and liquid, gas and solid, liquid and liquid or liquid
and solid in the material contact closely, and the surface is
constantly updated to complete the process of mass transfer
(generally accompanied by heat transfer).
The tower is a process equipment with cylindrical welded structure,
which is composed of cylinder, head (or cap) and support. It is a
non-standard equipment specially designed and manufactured for
certain production process requirements. The tower is a vertical
equipment used for distillation, purification, absorption,
distillation and other chemical unit operations. It is widely used
for mass and heat transfer between gas-liquid and liquid-liquid
phases. According to the structure of tower internals, the tower
can be divided into plate tower and packed tower. If the container
only contains materials without chemical reaction and other
physical and chemical processes, there are no facilities or only
simple auxiliary structures, it is also called a tank. Vessels are
divided into vertical (vertical axis) and horizontal (horizontal
axis) by type. Most of the columns are pressure vessels.
Equipment for material transfer between gas and liquid phases or
between liquid and liquid phases. According to the structure, it is
divided into two categories: plate tower and packed tower. A
certain number of trays are set in the tray tower, and the gas
contacts with the liquid layer on the tray in the form of bubbling
or jetting for material transfer. A certain height of packing is
installed in the packing tower. The liquid flows from top to bottom
along the packing, and the gas contacts with the liquid film
countercurrent from bottom to top to transfer substances. It is
often used in distillation, water absorption, extraction and other
operations.
According to the structure, it is divided into two categories:
plate tower and packed tower.