Optimization on Hysys

INTRODUCTION

• In this lecture, a simple distillation column to separate

Tetrahydrofuran (THF) from Toluene is simulated. The

objective of the exercise is to select the product

specifications such that profit is maximized.

A special tool in HYSYS, the Optimizer, will be used to

find the optimum operating conditions.

HYSYS includes additional modelling and decision

support tools that can be used to enhance the usability

of your models.

In this lecture, you will use the HYSYS optimization too

available in HYSYS to investigate the debottlenecking

and optimization of a crude column.

LEARNING OUTCOMES

• Use the Optimizer tool in HYSYS to optimize flowsheets

• Use the Spreadsheet to perform calculations

 PROBLEM STATEMENT

⚫ 3700 kg/hr mixture of tetrahydrofuran & toluene

(44 mass% THF) at 10°C and 140 kPa is to be

separated by distillation to get each of them with

purity of 99.5 mass% of THF & 94 mass% of

Toluene (THF is the more volatile component).

• Use Wilson fluid package

PROBLEM STATEMENT CONT.

The column specifications are:

The condenser & reboiler pressure are 103 kPa & 107

kPa.

The condenser works on total condensation

conditions.

Number of stages = 10.

• Feed enters from the 5th tray.

• Calculate:

- The reflux ratio and the distillate rate under the

specified conditions.