HYSYS再沸器模拟

For the distillation column and the reboiled absorber, the following

predefined reboiler pre-configurations (below) are available on page 2

of the column configuration wizard. Depending on the configuration you

can specify a HYSYS Reboiler, a Heater, or a heat exchanger model as the

reboiler type.

Thermosiphonreboilers can now be simulated rigorously using Aspen Shell

& Tube Exchanger (formerly Tasc+). Using this operation as the reboiler

you

can

select

different

types

of

EDR-Shell

and

Tube

heat

exchangers

such

as thermosiphon, kettle, and forced circulation.

The heat exchanger is integrated with the column so that rigorous

calculations can be done in both the column and the reboiler. The heat

exchanger is treated as part of the column and both the column and the

heat exchanger are solved simultaneously.

When

the

selections

are

complete

move

to

the

next

page

to

specify

top

and

last stage pressures.

Notes:

For

a

thermosiphonreboiler,

both

fixed-flow

and

find-flow

options

are implemented.

?

Some specs related to the EDR-Shell and Tube heat exchanger are

automatically defined to minimize user input.

?

A damping factor is added for EDR-Shell and Tube heat exchangers

inside the column sub- flowsheet to improve the convergence of the

solver.

?

Each

configuration

is shown both

as an approximation of the way it might

be

arranged

in

an

actual

column

and

in

detail

showing

how

it

is

represented

using heat exchangers, flash drums, mixers, and splitters. In these

diagrams, NT represents the number of trays (stages)

Reboiler Once-through

This

configuration

is

available

when

using

the

kettle

reboiler.

The

liquid

coming

from

the

stage

above

the

reboiler

passes

through

the

reboiler

once

and

is

returned

to

the

bottom

of

the

column

as

a

mixture

of

liquid

(which

goes into the sump, to be drawn as bottom product) and vapor (which goes

up to the stage above).