Divided Wall Column (DWC)

DWC Technology

Conventional scheme for the separation of
three components

In the first column, the intermediate volatility component B reaches a
maximum somewhere in that tower, but necessarily must be lower.
This represents a thermodynamic loss (remixing) that is unavoidable in
the sequential distillation scheme.

Alternative Arrangement
The two towers are thermally integrated to one tower. The first portion of
the tower is pre-fractionator, and the second portion of the tower is main
tower. The feed enters into the side of the pre-fractionator. The entire A
and some fraction of B will go over the wall to the upper section of the
main tower. The remaining fraction of B and the entire amount of C will
go under the wall to the lower section of the main tower. The top, bottom
and side product in the main tower will be A, B and C, respectively.
This arrangement can remove remixing.

high efficient distillation technology

TPT achieved the successful operation of DWC Technology in many separation columns in petrochemical plant.

Benefits of TPT’s DWC
Energy Saving (20~30%)
Reduce the Investment Cost

What TPT do in mass transfer application for DWC ?
DWC Modeling & Simulation
Optimum DWC Design
High Performance DWC Internal Design & Supply
Column Modification & Internal Installation
Liquid Splitter Design & Supply

Typical application of DWC technology
Octanol Separation Plant
Bio-Disel Plant
VAM Plant
NPG Separation Plant
Aromatic Plant
Solvent Recovery Plant
Other Chemical Separation Plant

TPT’s Liquid Splitter (Patented)

Non-moving type

Various split range