agitatordesignandselection-131108020731-phpapp01.ppt

8/18/2019 agitatordesignandselection-131108020731-phpapp01.ppt

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Agitator Design andSelection

Standard Engineers


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Food for Thought

You wanted to STIR THINGS UP But, your MIXING

gave only !GIT!TI"N#$

T%ere#s &any a sli' (etween t%e Plant and t%e )a($

T%e Mi*ing arena is t%e Bo*ing ring w%ere +%e&ist

and +%e&ial Engineer -ig%t

In t%e wor. done -or synt%esising a +%e&ial

&oleule, w%at / is t%e &ass trans-er, reation and

&i*ing and w%at / is se'aration

Mi*ing an (e de&ysti-ied


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Lecture Flow

Single duty !gitator

Multi duty !gitator

0il&s s%owing so&e Interesting Mi*ingsyste&s


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Agitator Selection & Design

Proess I&'eller Ty'e

I&'eller 1ia&eter

I&'eller S'eed

Me%anial Power

S%a-t


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A"ial Flow #ydrofoils

Hig% 1is%arge Hydro-oil

Hig% Sution Hydro-oil

Hig% Pit% Hydro-oil

Hig% Solidity Hydro-oil


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#igh Shear !mpellers

Hig% S%ear +owles

Hig% S%ear Stator6Rotor

Gas Indution 1is'erser

Para(oli 1is Tur(ine


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!mpellers with com$ined Flow

and Shear

U1I0 or InterMig

Multi Stage

)arge 19T

0low and S%ear


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19T

Single I&'eller v9s Multi I&'eller

Botto& +learane I&'eller S'aing

Ba--ling

Process !mp. Diameter


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Ti' S'eed : ;$r :


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Agitator Design % Power

Power : >$?$N@$1A

)ow Power : )ower +ost

Hig% Power : Hig%er Energy dissi'atedS'eed variation wit% onstant Power

C01 and Power Issues


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Motor

Gear(o*

SealS%a-t

I&'eller

Agitator Design % echanical


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ulti%duty mi"er or 'niversal i"er

!ny Mi*ing Tas. re5uiring 0low or S%ear

!ny Unit Proess or !ny Unit "'eration

0ro& violent 1is'ersions to gentle

+rystallisation

All in same (eactor


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)hen is it *eeded+

+%ange in Produt S'ei-iations

New R71 Results+%ange o- Produt

New Regulations

T%ere are &any un.nowns in

&odern day o'erations


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+%ange in Prod$ S'es

+usto&ers 2Internal as well as E*ternal3 are a 1e&anding )ot

+%ange in Partile SiDe 2Inrease 9 1erease3

1i--erent PS1

Hig%er Purity 2(igger rystals wit% less M)3

1i--erent P%ysial %arateristis 2olour, s%a'e,

solution, e&ulsion, dis'ersion3

!dditional ste' -ro& downstrea& Proessing 1i--erent out'ut Te&'erature

Many ot%ers

*eed ,

k

o

w


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New R71

+o&'etiton, +ost Redution and New Te%nologies

2ioni solvents, su'er aids, Green +%e&istries,

sur-atants, nanote%nologies3 t%row radial

'ossi(ilities o- Proess Intensi-iation -or

Hig%er Yield 9 +onversion

Redued (y6Produt -or&ationRedued Utility onsu&'tion

Redued (at% yle ti&es

*eed -

k

o

w


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+%ange o- Produt

ampaign $ased Production cycles demand

fle"i$ility in capa$ilities

New Produt

1i--erent Proess

1i--erent o'erating onditions

*ew Product Developed in the La$ or Pilot Plant

needs to $e Produced on plant scaleUne*'eted sale6u' onsiderations

Proess &odi-iations (ased on IP 9 5uality

*eed /

k

o

w


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New Regulations

0anned raw materials1 stringent disposal norms

can impose varia$ilities

Rei'e +%ange

+%ange in o'erating onditions

+%ange in Proess

*eed 2

' n 3 n o w

n k o

w


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Process apa$ilities

)hat must it #ave+

)#AT

Range o- S'$ Gr$

)arge solids loading

Range o- Cisosities Range o- 1uties -ro&

gentle rytallisation to

violent Gas 1is'ersion

T%$dyn&s F 4 Te&'$

T%$dyn&s < 4 Press$

T%$dyn&s @ 4 'H

#4)

Sur'lus &otor Power

)arge Pu&'ing

)arge 19T, &ultistage Signi-iant Cariation in

S'eed wit% reserve

'ower

Good Reynolds No$

Me%$ Sealing

E*oti M"+


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ech. apa$ilities

)hat must it #ave+

Ro(ust design o- S%a-t and I&'ellers to

deliver (rute -ore i- re5uired

Natural 0re5uenies o- )ateral Ci(rations to

(e su(stantially distaned -ro& o'erating

s'eed ranges

ui. +%ange to (e 'ossi(le to %andle new

onditions wit% &ini&u& turn6around ti&e


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Derivation

Mi*ing energy goes into 0low and S%ear 0low is Measured as Pu&'ing 2?'N1@3

Good &etri -or S%ear is Ti' S'eed 2N13

Universal Mi*er t%ere-ore %as to

Inrease or 1erease

0low or S%ear on de&and


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Derivation

0low Pro'ortional to 1/

Reynolds No$ 7 so Heat Trans-er 'ro' to 1-

Bul. &otion in visous -luids needs large 1Large D5T o$viously a must for 'niversality

Good %o&ogenity in &i*ing

ulti impeller system advantageous

A"ial flow re6uired to prevent 7air curtain8 effects


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onventional !mpellers 19T

Limit

Hydro-oils and !*ial 0lowtur(ines %ave a 19T )i&it

!t $ 19T, T%e 9s areao- t%e i&'eller ylindere5uals t%e 9s area o-t%e !nnulus

!ny -urt%er inrease isounter 'rodutive

0low is t%rottled leadingto (a. &i*ing andinonsistenies

Annulus

'p Flow

!mpeller 9one

Down Flow


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!deal !mpeller System

19T J $ !%ieved (y u' and down -low

on sa&e i&'eller Multi'le staggered i&'eller

arrange&ent (e%aves as a'seudo %eli* +an (e usto&ised -or

o'eration wit%out (a--les T%e u'6down t%row an (e

on-igured -or di--erentonditions o- s%ear and -low Proven -or +rystallisation, Gas

1is'ersion as well as 'retty%ig% visosity (lending


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'D!F % 4ther Advantages

)arge 19T : Hig% 8all veloities : &in$(uild6u' at

vessel walls Good -or Sti.y &aterials

Good -or +rystallisation In Gas 1is'ersion, -urt%er o'ti&isation wit% (otto&

i&'eller 'u&'ing u' t%e atalyst, w%ile to' i&'eller

su.s and 'u&'s down unreated gas

< (laded so easy to insert t%ru &an%ole w9o (oltingor s'lit onstrution an allow loation anyw%ere

along s%a-t


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:"tended 'niversality

I- t%e &e%anial design o-

t%e Universal &i*er is &ade

ro(ust, t%en t%e sa&e s%a-t

an (e 0ITTE1 wit%

di--erent i&'ellers wit%di--erent s'eeds -or

'er-or&ane at (ot%

e*tre&es o- 0low and S%ear

Helial an &i* visosities

u'to F, P Para(oli or gas Indution

an do gas dis'ersion


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Paradigm Shift

8e %ad li&ited ourselves to single s%a-t &i*ers$ 8%at a(out dual s%a-t, +o6a*ial syste&s 8%y not 'lae t%e res'onsi(ility o- 0low and S%ear on

< di--erent i&'ellers t%at are ideal -or t%eir res'etiveduties

"ne I&'eller 'rovides 0low, t%e "t%er S%ear Bot% are on di--erent drives so t%at s'eeds and %ene

&agnitudes o- 0low and S%ear an (e ontrolled at will

I&'ellers on t%e outer Done an (e losed ty'e 6Helial w%ile inner an (e %ydro-oil or +owleso'erating at s'eeds as %ig% as @RPM

Me%anial %allenge, (ut a 'roess &arvel


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yths to $e Shattered

)ower Motor Power &eans lower o'erating

ost

Hydro-oils an do everyt%ing

19T to (e around F9@ to $K

Mi*er s%ould (e low a'ital ost$

No o'tion to G)R AHD (arrier

+%e&ist and +%e&ial Engineer


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onclusion

1eide Single duty or Multi duty

I- Single duty 6 1eide 1uty driver is 0low or

S%ear

Selet i&'ellers aordingly

I- Multi duty, large 19T, &ulti i&'eller, varia(le

s'eed$

Ensure &ini&u& %ot s'ots 2'H, te&'$,

onentration3


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0atch rystalliser i"er

0low or S%ear "(viously 0low -or larger rystals,S%ear -or s&aller

I&'eller Ty'e$ 4 !n%or is t%e worst

Te&'erature gradient +on$ Gradient Grinding at (otto&

I&'eller 1ia&eter$

I&'eller s'eed Multi I&'eller Me%anial 4 C01$


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vineet shroff@gmail com

!n the end ;

So&e 0il&s

Cideo FL +o6rotating +o6!*ial 1is'ertron

T%an. You

Start !gain
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