As a Hydrogen Peroxide Manufacturing Plant, share with you.
Composition and layout of distillation tower system
The distillation tower system is composed of simple distillation tower,
reboiler, condenser, reflux tank and other equipment. Generally, it is arranged
as close as possible to form an independent operating system according to the
sequence of the process and in compliance with the requirements of the
specification. Similar equipment is centrally arranged. For example, the
condenser is generally arranged on the third floor, and the return tank is
arranged on the second floor.
Distillation Technology
On the floor, the reboiler is installed at the bottom of the distillation
tower, and the pump is arranged on the first floor. This is not only neat and
beautiful, but also convenient to operate. Due to the particularity of the
reboiler, its related equipment and pipelines need to be carefully designed.
Distillation tower system operation
The liquid at the bottom of the tower is heated by the reboiler to partially
vaporize it, and it enters the tower from the entrance of the reboiler at the
bottom of the tower to make countercurrent two-phase contact with the descending
liquid. The volatile (low boiling point) components in the descending liquid
continue to Transfer in the vapor, the hard-to-volatile (high boiling point)
components in the vapor are continuously transferred to the descending liquid,
and the vapor becomes more and more connected
Near the top of the tower, the higher the concentration of volatile
components, and the closer the descending liquid is to the bottom of the tower,
the more concentrated the harder volatile components will be, achieving the
purpose of component separation. The vapor rising from the top of the tower
enters the condenser, a part of the condensed liquid is returned to the top of
the tower as reflux, and the rest is sent out as distillate. Part of the liquid
flowing out of the bottom of the tower is sent to the reboiler to be heated and
returned to the tower, and the other part of the liquid is extracted as the
bottom of the kettle.
Thermosyphon reboiler
1. Principle of thermosyphon reboiler
The thermosyphon reboiler uses the pressure head difference between the
liquid level of the distillation tower and the liquid level of the reboiler as a
power to drive the liquid gravity to circulate, so that the liquid at the bottom
of the distillation tower flows to the reboiler. A part of the liquid is
vaporized in the reboiler and returned to the tower to achieve vapor and liquid
separation. In order to ensure the normal operation of the reboiler, a certain
pressure difference must be ensured to overcome the pressure drop in the
pipeline, the reboiler and the two-phase static pressure.
2. Installation height requirements of thermosiphon reboiler
The liquid at the bottom of the distillation column flows into the pipe, and
the higher the pressure, the lower the pressure. If the pipe where the liquid
rises is high, the pressure will drop to the point that bubbles (consisting of
air or other gas) are generated in the pipe. The height of siphon action is
determined by the formation of bubbles. Because the bubbles will break the
liquid, the two bubbles
The force between the gas molecules at the side is reduced to 0, thereby
destroying the siphon effect. The installation position of the thermosiphon
reboiler is not as low as possible.
Our company also has Distillation Technology on sale, welcome to contact
us.
