1. Separator :
Separator allows separating the
stream to two phases, vapor and liquid phase , he
works with the gravity separation (phasic separation).
Let us see example how it
works, we have a mixture stream (vapor + liquid), this last enter to separator,
and it will happen is the vapor phase goes from the top and the liquid from the
bottom
First, we have to define the
inlet stream (converged), define the outlet vapor stream and the outlet liquid
stream (just by written names).
Stream
|
|
T (°C)
|
97
|
P (bar)
|
15,5
|
Molar flow (kmol/h)
|
737,96
|
about Energy stream, do not define it (because it will eliminate the Principe of separator)
Second, we have to specify the
Delta P of outlet vapor (delta p of both, the inelet stream and the vapor outlet) and liquid streams (inlet delta p) , about Volume and Liquid volume
ignore them right now because they specified for the dynamic and the type of
separator that you could pick the other two separator (tank, 3-phase separator)
Finally, we get the separator
converged
2. 3-Phase Separator :
This equipment has same principle
of Separator, so he works with phasic separation (gravity separation), for 3
phases, vapor-liquid light-liquid heavy.
First, we have to define inlet
streams, let us take example stream contain gas-oil-water.
Stream
|
|
T (°C)
|
97
|
P (bar)
|
15.50
|
Compositions
|
(C1-C12) +
water
|
Molar flow (kmol/h)
|
737,96
|
Second, specify Delta P just
like the separator
Let us see results
Interpretation :
We notice there is a lot of water
in vapor stream and oil (because it's not fully separation, it's just initial
separation), about the heavy liquid (water) we notice it’s
perfect. (But in real we treat it again until making sure to minimize
hydrocarbons to < 50 ppm).
Finally we get our equipment
converged
3. Tank :
The Tank generally is used to simulate liquid
surge vessels, it products two stream, vapor outlet stream and liquid outlet
stream.
The Tank has same principle of separator.
5. Shortcut column :
The Tank has same principle of separator.
4. Component splitter :
Component splitter separates the stream
feed to two streams based on the parameters and split fractions that you
specify.
We Use it to approximate the separation for
proprietary and non-standard separation processes that did not handle elsewhere
in HYSYS.
First we have to define stream inlet (always must be converged), and
we have to define the products streams (by writing names), we have to define Energy
stream too (by writing name), this last, it is very important because it can be
simulated without energy, and here it works like separator.
Second, we have to specify pressures of
outlet streams (overhead, bottom), and we have to specify the vapor fraction
(PS: vapor pressure varies between 0<……<1, 0 it means it’s liquid phase,
1 means vapor phase and between them it means (liquid + vapor) phase),
Third, we have to specify the split components
This configuration was for one overhead product
and one bottom product, but we can make unlimited of inlet streams and we can make
unlimited energy streams, we can product unlimited overhead products, let us
see example.
5. Shortcut column :
The short cut column is a simple refluxed
towers, used for calculate a the vapour and liquid traffic rates the condenser
duty and reboiler duty, the number of ideal trays, and the optimal feed location.
The Shortcut Column is only an estimate of
the Column performance. This operation can provide initial estimates for most
simple Columns
First, we have to define inlet stream
(converged), and the outlet streams, and define the energy streams.
Second, we have to specify :
- Light key bottom (means the lightest component in the bottom stream is this component who we have specified)
- Heavy key distillate (means the heaviest component in the overhead stream is the component who we have specified).
- Pressure of condenser and roboiler
- External reflux ratio
After that, we get our column converged we
can see a lot of information
- A minimum numbers of trays (<20,149 this column with this stream cannot work less to 21 trays)
- Actual numbers of trays (52.029 means the number of trays for this this stream is 53 trays).
- Optimal feed stage (29,94 means streams feeds in 30 stage)
- Temperatures of condenser and reboiler
- Rectify vapor ( stripping vapor * reflux ratio)
- Rectify liquid (stripping liquid * reboiling ratio)
- Condenser and reboiler duty
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