structural packing recent advancement and its application

8/19/2019 STRUCTURAL PACKING� RECENT ADVANCEMENT AND ITS APPLICATION

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INTRODUCTION

Packings are used in towers to contacting equipment for gas-liquid and liquid-liquid systems.

The shell is usually cylindrical, although square wooden, light metal or reinforced plastic towers are used.

The basic unit consists of:

1)hell.

!)Packing.

")Packing supports.

#)$iquid distributors.

TYPES OF PACKING: 1)%andom Particle Packing.

!)&rid Packing.

")tructured Packing.

') RANDOM PARTICLE PACKING(

Their proper selection entails an understanding of packing operational characteristics and theeect on performance of the points of signicant physical dierence between the various types.

Good progress has been made in the past decade in the development of packing for dicult

and wide ranging process application. t is discrete, indi*idually, shaped particle designed to pro*ide contacting surfaces between normally down flowing

liquid and up flowing *apor.

+) GRID PACKING; t is probably the newest type packing.

t is lower in pressure drop and has higher capacity and lower efficiency then the other types.

%%/(

Ernest E. Lu!"#.$APPLIED PROCESS DESIGN$ PACKED TO%ER&VOLUME'(&THIRD EDITION )(*+ , (*-.


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T0P T%7/T7%4 P'/2&

/Me0012134 1n Me001213P0us45

REFERENCE)/5

http://www.sulze.!"#/e$/P"%u!ts&'$%&Se()!es/Sep''t)"$&Te!h$"l"*+/Stu!tue%&P'!,)$*s/Mell'p',&Mell'p',Plus&Mell'p',&Pl'st)!.

REFERENCE)(5http://www.sulze.!"#/e$/P"%u!ts&'$%&Se()!es/Sep''t)"$&Te!h$"l"*+/Stu!tue%&P'!,)$*s/G'uze&P'!,)$*s&-&C&-Plus&APl&DC&0+pe1l&'$%&Mult)1l

'

( pplications;9igh pressure for selected applications.)igh pressure for selected applications.

Petrochemical industry: quench columns, /"- and /#- splitters, >ylene splitters. %efineries: *acuum and atmospheric columns.

(G1u6e P173"n#s(

2ey /haracteristics(

2ey /haracteristics(

Pressure drop per theoretical stage ;." - 1.; mbar.Pressure drop at ?;-@;A flooding about ! mbarBm. 8inimum liquid load appro>imately ;.! m"B m!h.

$arge number of theoretical stages. n *acuum from 1 mbar to atmospheric pressure .

5here minimum pressure drop per theoretical stage is important.

'pplications(8onomers from plastics.atty acids, fatty alcohols, fatty acid esters.8ono,di, tri and tetra-ethylene glycols.

http://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Mellapak-MellapakPlus-Mellapak-Plastichttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Mellapak-MellapakPlus-Mellapak-Plastichttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Gauze-Packings-BX-CY-BXPlus-AYPlus-DC-Hyperfil-and-Multifilhttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Gauze-Packings-BX-CY-BXPlus-AYPlus-DC-Hyperfil-and-Multifilhttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Gauze-Packings-BX-CY-BXPlus-AYPlus-DC-Hyperfil-and-Multifilhttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Gauze-Packings-BX-CY-BXPlus-AYPlus-DC-Hyperfil-and-Multifilhttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Mellapak-MellapakPlus-Mellapak-Plastichttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Mellapak-MellapakPlus-Mellapak-Plastic


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*H89r" G1u6e P173"n# AYP0us4 DC5

pecial eatures(

Pressure drop comparable to 8ellapakPlus !C!.0 and for aqueous systems e*en lower.

Pressure drop comparable to 8ellapakPlus !C!.0 and for aqueous systems e*en.

(pplications

4imethyl acetamide B water.

4imethyl formamide B water.

&as sweetening wash sections.

&lycol dehydrations.

/aprolactam.

thanolamine.

thylene glycols.

Mu0t";"0 P173"n#5

4e*eloped by 2nit 8esh in the early =;Ds, this is one of the earliest structured

packing types, consisting of spirally wound knitted mesh. or laboratory column diameters ranging from !C to 1;; mm.

specially suited for e>otic materials.

REFERENCE)*5

http://www.sulze.!"#/e$/P"%u!ts&'$%&Se()!es/Sep''t)"$&Te!h$"l"*+/Stu!tue%&P'!,)$*s/0+2)%&G'uze&P'!,)$*&APlus.

RE3ERENCE4567http://www.sulze.!"#/e$/P"%u!ts&'$%&Se()!es/Sep''t)"$&Te!h$"l"*+/Stu!tue%&P'!,)$*s/L'2"'t"+&P'!,)$*s&D&E

+

http://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Hybrid-Gauze-Packing-AYPlushttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Hybrid-Gauze-Packing-AYPlushttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Laboratory-Packings-DX-EXhttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Laboratory-Packings-DX-EXhttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Laboratory-Packings-DX-EXhttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Laboratory-Packings-DX-EXhttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Hybrid-Gauze-Packing-AYPlushttp://www.sulzer.com/en/Products-and-Services/Separation-Technology/Structured-Packings/Hybrid-Gauze-Packing-AYPlus


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T0P T%7/T7%4 P'/2&

%%/C)(

http,--www.suler.com-en-/roducts0and0ervices-eparation0Technology-tructured0/ackings-2aboratory0/ackings0340"4 .%%/=)(

http,--www.suler.com-en-/roducts0and0ervices-eparation0Technology-tructured0/ackings-Grids05ellagrid0#0Grid0$utter0Grid .


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? INTALO>? @"#@ 71217"t8 stru7ture 2173"n#(

!"#"!"$%"89:;

http,--www.koch0glitsch.com-masstransfer-pages-$T(2 .

The higher capacity of T'$EF structured packing is deli*ered by a

combination of:'n aggressi*ely te>tured surface./orrugation re*ersals in each packing layer.ther proprietary geometric features.T'$E structured packing is successfully used in a *ariety of high

liquid rate, high pressure systems in addition to the usual applications in

*acuum and atmospheric processes.The aggressi*e surface te>ture of T'$E structured packing pro*ides

e>cellent surface wetting, making it a preferred packing in aqueous

distillation applications.The unique physical characteristics of T'$E structured packing

show their ad*antage in the larger corrugation crimp siGes by pro*iding:uperior efficiency compared to other structured packings of similar

surface area.>cellent capacity and pressure drop characteristics.

http://www.koch-glitsch.com/masstransfer/pages/INTALOX_SP.aspxhttp://www.koch-glitsch.com/masstransfer/pages/INTALOX_SP.aspx


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AMACS %OVEN STRUCTURED PACKING5

!eference8?:;

http,--www.amacs.com-packing-structured-.

'8'/ 5o*en tructured Packing is e>cellent for application that require a large

number of theoretical stages, lower pressure drop and small o*erall packed bedheights.The packing is manufactured from specially wo*en wire gauGe that impressed into

smooth plates, uniformly perforated, corrugated and stacked with corrugations in

alternate directions.This construction promotes intimate gasBliquid contact. '8'/'5P packing is well suited for applications that require high separation

efficiency and minimal hold-up.5o*en structured Packing is a*ailable in a wide range of metal and alloy

materials.'pplications:Pharmaceuticals.ine chemicals.

la*ors and fragrances.lectronic chemicals.

http://www.amacs.com/packing/structured/http://www.amacs.com/packing/structured/


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T0P T%7/T7%4 P'/2&

FLE>IPAC? stru7ture 2173"n#5 Pro*ides a lower pressure drop per theoretical stage and increased capacity compared to trays

and con*entional random packings.

/haractistics: $EP'/ packing is a*ailable in a *ariety of corrugation crimp siGes, each at two inclination angles.

H0H designated packings.

#C degree nominal inclination angle from horiGontal.

8ost widely used.

HEH designated packings.

=; degree nominal inclination angle from horiGontal.

7sed where high capacity and low pressure drop are required.

Pro*ide lower pressure drop per theoretical stage for the same surface area.

%eference(

http:BBwww.koch-glitsch.comBmasstransferBpagesBfle>ipac.asp>.@

'PP$/'T(mpro*ed product yields.mpro*ed product purities.%educed reflu> ratios.ncreased throughput.$ower pressure drop.%educed liquid holdup.

ncreased heat transfer.

http://www.koch-glitsch.com/masstransfer/pages/flexipac.aspxhttp://www.koch-glitsch.com/masstransfer/pages/flexipac.aspx


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/+FLE>ERAMIC4 Stru7ture P173"n#

%%/81A:;http:BBwww.kochknight.comBfle>eramic-structured-packing.html.

1A

$E%'8/I tructured Packing is geometrically arranged corrugated sheets that

offer impro*ed operation o*er saddle random packing and pro*ides greater resistance to

fouling than random or monolithic packing.

ur design pro*ides high capacity, higher efficiency and lower pressure drop than anyrandom packing and most trays that are a*ailable today.%e*amp of e>isting packed or tray columns with structured packing from 2och 2night&

$$/. offers an economical alternati*e to other media.$E%'8/I structured packing pro*ides plant operators increased separation

efficiency and operation capacity, lower pressure drop and often significantly lower energy

costs for distillation or absorption operations.

ur structured packing element is manufactured from ad*anced ceramics for long lasting performance.$E%'8/I structured packing is a market leader in structured media.2&9T-/98I $E%'8/I /eramic tructured Packing pro*ides the

ad*antages of a high purity, acid resistance and nonporous grade of porcelain with the

geometry of one of the most ad*anced ceramic packing in the world.

http://www.kochknight.com/flexeramic-structured-packing.htmlhttp://www.kochknight.com/flexeramic-structured-packing.html


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T0P T%7/T7%4 P'/2&11)/eramic tructured Packing(

%%/11)

(http:BBwww.ceramic-honeycombs.comBceramicB/eramicJtructuredJPackingJ%egularJPacking.htm .

KT' /eramic tructured Packing is constructed of corrugated sheets ofceramic. This promotes intimate mi>ing and radial distribution of the liBuid and

gas streams.n passing through each elementC gas and liBuid are thoroughly mi>edin the direction parallel to the plane of the sheets. Dy rotating subseBuent elementsC e>cellent mi>ing and spreadingCboth side to side and front to back are obtained over the entire crosssection of the tower.'pplication (ining process of corrosi*e mi>tures, which ha*e strict requirements for pressure drop

and number of theoretical sheets.

6acuum treatment under absolute pressure higher than1m bar.ining and distillation of halogen organic compounds.%ectifying organic halide.%ectifying and absorbing some corrosi*e mi>tures, which are definitely regulated in

pressure drop and theoretic plate number.'pplied in some towers that contain a large quantity of natural media used to absorb

nitric acid and concentrated sulfuric acid, as well as for purifying the air in chemical plants.perating in *acuum conditions at a bottom absolute pressure of 1;;pa.7sed in heat e>changer and demisting, or as a catalyst carrier.

http://www.ceramic-honeycombs.com/ceramic/Ceramic_Structured_Packing_Regular_Packing.htmhttp://www.ceramic-honeycombs.com/ceramic/Ceramic_Structured_Packing_Regular_Packing.htmhttp://www.ceramic-honeycombs.com/ceramic/Ceramic_Structured_Packing_Regular_Packing.htmhttp://www.ceramic-honeycombs.com/ceramic/Ceramic_Structured_Packing_Regular_Packing.htm


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T@"n ;"0 ;0=! =er stru7ture 2173"n#s 1t =er1te Re8n=0s nu9ers

' model describing the dynamic e*olution of wa*es on laminar falling wa*y films at low to moderate %eynolds

numbers ReL";) o*er corrugated surfaces is presented.

This model is based on the integral balance method, which is used to simplify the analysis by assuming a parabolic

*elocity profile within the bulk of the film. The predictions of this model are compared to those obtained from a computational fluid dynamics /4) code for

which no assumptions regarding the film *elocity profile are made.

The film e*olution profiles, obtained *ia numerical solution of the model equations, are used to calculate the ratio of

film interfacial area to that of the substrate.

The model predicts suppression of wa*e growth on a corrugated surface.

The model is also used to predict the effect of packing geometry on the flow characteristics, which may impro*e

packing design.

olutions obtained for Re !;; using the /4 code demonstrate the degree of fluid accumulation within the M*alleysD∼

of the structured substrate wherein re-circulation occurs.

REFERENCE5

@tt2:!!!.117s.7=2173"n#stru7ture.

http://www.amacs.com/packing/structured/http://www.amacs.com/packing/structured/http://www.amacs.com/packing/structured/

structural packing recent advancement and its application

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