3. unit procedure initialising

8/16/2019 3. Unit Procedure Initialising

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PTT303 /2PROCESS MODELLING AND

SIMULATION

SEM 1 (2013/2014)

Introducton to Su!"r PRO

D"#$n"r %or &'tcProc"##n$ Mod"n$

(P'rt 2)


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STUDENT S*OULD &E A&LE TO+

DEMONSTRATE the ,"tod# o% nt'#n$ o%

o!"r'ton o% unt !roc"dur"#

SIMULATE t" -o.#""t o% o!roc"## !roducton!'nt


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SESSION OUTLINE

Unit procedures initialisation

Simulation execution & result checking


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INITIALISING A UNIT

PROCEDURE

What aUnit Procedure?

Initialising anOperation


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WHAT IS A UNIT

PROCEDURE?

In the batch modeling mode, a UnitProcedure may consists of variousOperations:

Reactor procedure: feed charge, reaction,product withdraw, etc

Filtration procedure: filtration, cake wash,CIP, etc

Incontinuous modeling mode, aUnitProcedure= Unit Operation


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HIERARCHY IN BATCH MODELING

Operation(s) level

Procedure(s) level

Entire plant

The same forcontinuous

process

modeling


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FUNCTION OF EACH UNIT

PROCEDURE

Vessel Procedure (P-1): Acts as abatch reactor to

carry out reaction:

A + B CHeptane is used to dissolvecomponents A & B,

to aid separation in P-2

Plate and Frame Filtration (P-2):Component C is not dissolved in heptane, hence isfiltered outby the filter cloth

Heptane is used to wash out the trapped heptane ( and also th

dissolved A & B) from the filter cake


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STREAM SPECIFICATION

Click to insert

Heptane here

Heptane flow =

800 kg/batch

Ingredient flow

T, P = default


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SET SPEC FOR STREAM A & B

Stream ID ComponentAmount

(kg/batch)Temperature

Pressure

Heptane A

B

Heptane A

B

80050

40Default


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WORKING

SESSIONDo not forget to save your work !!!


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A QUESTION TO PONDER…

Q: Why do we only specify theinlet stream?


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ADDING OPERATIONS TO P-1

3Charge operation (to

charge A, B and

heptane respectively)1React (Stoichiometric)

operation (for reaction

to be carried out)

1Transfer Out operation (to deliver

product to next unit)


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Add new operation

before the currently

selected operation

Add new operation

at the end of the list


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INITIALISING OPERATIONS IN P-1


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INITIALISING CHARGE-1

Vol. flowrate

=100 L/min

Setup time =

5 min

800 kg heptane

Emission calculation

(next slide…)


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EMISSION CALCULATION

lick to perform

mission calculation

OK, next operation

(CHARGE-2)

OK, previous

Operation (none)

Previous operation

(same tab –none)

Next operation

(same tab)

Go to selectedoperation


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INITIALISING CHARGE OPERATION

Operation Operating condition Emission

CHARGE- C!arge 800"g#$atc! of !eptane usingstream %Heptane&

'etup time( 5 min

)rocess time * 00+#min

)erform!eptaneemission on t!isstream

CHARGE-, C!arge 50 "g#$atc! of A limitingcomponent. using 'tream %A&

'etup time ( 5min

)rocess time* calculated $ased on ,0"g#min

/il

CHARGE- C!arge 40#"g $atc! of B using 'tream %B&B is in e1cess.

'etup time ( 5 min

)rocess time * calculated $ased on ,0"g#min

Please complete the initialisation ofCHARGE-2 & CHARGE-3


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INITIALISING REACT-1 & TRANSFER-

OUT-1

Operation Operating condition 2olumes Reaction

REAC3- inal temp ( 50 C

Heat transfer agent*steam

)rocess time ( 6 !our

+ea7e ot!er 7alues asdefaults

a1 Allo9a$le9or"ing#

7essel7olume* 80 :

E1tent of reaction( ;5 :

Reactionstoic!iometr<

A = B C

3RA/'ER-

O>3-

>sing stream %R1t out&

Duration* same as Clot!iltration in )-, using

aster-'la7eRelations!ip.

/il


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INITILISING REACT-1 IN P-1

Steam

Process time

= 6 h

Final temp = 50 °C

Max allowable volume

= 80 %


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INITIALISING REACT-1 IN P-1

Reaction

extent = 95 %

Edit reactionstoichiometry

Rename reaction

Add reaction(s)

Delete

stoichiometry(when needed)

Molar

stoichiometry

OK, next operation

(Transfer-out)


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INITIALISING TRANSFER OUT

Transferout stream

Click here to select

Master-and-Slave to

calculate duration

To quit Vessel

Procedure

Select the Master

Procedure

Select the Master

Operation in

Master Procedure


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MASTER-SLAVE RELATIONSHIP

Slave

Master

Master operation – processing step that control the duration of

another operation (slave)

When simulation is executed,duration calculation for the slaveoperation will be bypassed (note:M&E balances affected), until

the master operation is met

Both master and slave operation may exist in the same procedur

or in another procedure


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WORKING

SESSIONLet’s try before we proceed further…


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INITIALISING OPERATION FOR P-2

Cloth Filtration operation(by default, to filter

product C)Cake Wash operation (towash out left over trapped

A & B in filter cake)Transfer Out operation (todeliver product)


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INITIALISING OPERATIONS FOR P-2


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INITIALISING FILTER-1

Operation Operating condition Scheduling

FIT!"#$ Particulate componentremo%al& ' C (assumingthat A * + are completel,

soluble in -eptane * C is%irtuall, insoluble).

OD (loss on dr,ing) 0 (this %alue cause aportion o1 heptane * an,

soluble component to beheld in the 2et cake 3is insoluble C).

Filtrate stream& 4+ 5

-eptane6

+, de1ault7 1irstoperation o1 an,batch unit

procedure isscheduled to startat the beginning o1the batch

Start time& relati%e

to the STA"T o1T"A8SF!"#O9T#$operation in P#$procedure


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INITIALISING FILTER-1

Scheduling

C = 95%removal

LOD = 35%

Filtrate

By default

Filtration will only start

when product is

transferred out from P1


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INITIALISING CAKE-WASH-1 &

TRANSFER-OUT-1

Operation Operation condition

CA?E-@A'H-

@as! n stream* %@as! in&

@as! Out stream* %@as! out&

@as! sol7ent* !eptane clic" on %Composition& select %Auto-adust& t!e program 9ill estimate a 7alue automaticall


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WORKING

SESSIONRemember to save your file !


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SIMULATING A FLOWSHEETExecute the simulation

Viewing the results


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RESULT VIEWING

1. Calculated output variables for each oeration can beviewed by revisiting the correspondingOperationData dialog windows

2. To see the calculated equipment sizes, right click on

the unit procedure icon & choose theEquipmentData… option

3. The contents of a piece of equipment as a function oftime can be viewed by right clicking on a unitprocedure and selectingEquipment Contents orOperation Sequence

4. The calculated flowrates and compositions ofintermediate & output streams can be viewed by intheSimulation Data dialog windows of each stream


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RESULT VIEWING

5. A list of reports can be viewed inReports:Stream Reports (SR)Economic Evaluation Report (EER)

Itemized Cost Report (ICR)Cash Flow Report (CFR)Throughput Analysis Report (THR)Environmental Impact Assessment Report (EIR)

Emission Reports (EMS)Input Data Report (EDR)Equipment Report (EQR)

Let’s visit the one by one…


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EQUIPMENT CONTENT


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STREAM SIMULATION DATA


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GENERATING A STREAM REPORT


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CHECK YOUR SCHEDULING

RESULTS

Reaction A B C

@

nitial content miO "g.

nitial mol niO "g-mol.

( ;5: $ased on A.

Current mol n "g-mol.

Current content m "g.

n AO-n AO nBO-nBO

-

-

n AO

+


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CHECK YOUR SCHEDULING RESULT

Heptane charge =____kg/batch (streamspecification)

Volumetric flowrate=___L/min (in OperationData/CHARGE-1)

Task: Find out the density of the heptane stream fromyour simulation sheet

Verify the heptane charging duration calculated

by SPD heptane


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DO NOT JUST TAKE

THE COMPUTER’S

WORD AS IT IS, PLEASECHECK YOUR RESULTS

ACCORDINGLY!!!REMEMBER THE GIGO PRINCIPLE

3. unit procedure initialising

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