quench tower design

7/26/2019 Quench Tower Design

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Table of Contents

1.0 DESIGN OF A QUENCH TOWER..................................................................................4

1.1 Poble! State!ent........................................................................................................4

1." Geneal O#e#$e% on Q&en'( To%es..........................................................................4

1.".1 S)a* to%es...........................................................................................................4

1."." +ent&e s'&bbe.....................................................................................................,

1.".- Pa'e/ to%e...........................................................................................................

1.- ATERIA2 3A2ANCE...............................................................................................

C(e!$'al en$nee$n /es$n..............................................................................................5

1.4.1 T(e /ens$t* of t(e as !$6t&e $s 'al'&late/ as......................................................5

1.4." T(e #ol&!et$' flo%ate of t(e as 7QG8 'an be 'al'&late/ b*...............................9

1.4.- T(e at$o of t(e l$:&$/ !ass flo% ate to t(e as !ass flo% ate $s $#en b*..........9

1.4., Cal'&lat$on of )ess&e /o) at floo/$n..............................................................10

1.4. S&)ef$'$al as #elo'$t* 'al'&lat$on......................................................................10

1.4.; T(e /$a!ete of t(e 'ol&!n 'an be 'al'&late/ fo!.............................................11

1.4.5 T(e %all fa'to 'an be $!)otant fo 'ol&!ns %$t( an $na/e:&ate at$o of

effe't$#e )at$'le /$a!ete to $ns$/e 'ol&!n /$a!ete< an/ $s $#en b*=.......................1"

1.4.9 T(e effe't$#e )at$'le /$a!ete< /)< $s $#en b*.....................................................1"

1.4.10 T(e Re*nol/s n&!be of t(e as 'an be 'al'&late/ as.......................................1-

1.4.11 Cal'&lat$on of /*>as>)ess&e /o)..................................................................1-

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1.4.1" T(e l$:&$/ !ass #elo'$t* 'an be 'al'&late/ as....................................................14

1.4.1- T(e Fo&/e n&!be of t(e l$:&$/ 'an be 'al'&late/ as=......................................14

1.4.14 Cal'&lat$on of s)e'$f$' l$:&$/ (ol/&).................................................................1,

1.4.1, Cal'&lat$on of )ess&e /o) %(en t(e be/ $s $$ate/......................................1

1.4.1 He$(t E:&$#alent of T(eoet$'al Plate 7HETP8.................................................1

1.4.1; N&!be of Tansfe Un$ts 7NTU8.......................................................................1;

1.4.15 He$(t of O#eall Gas Tansfe Un$t 7HOG8......................................................15

1.4.19 CO2UN HEIGHT...........................................................................................15

1., ECHANICA2 ENGINEERING CA2CU2ATIONS..............................................."0

1.,.1 Des$n Pess&e...................................................................................................."0

1.,." Des$n Te!)eat&e.............................................................................................."0

1.,.- $n$!&! +essel T($'ness.................................................................................."0

1.,.4 Dea/ We$(t of +essel.........................................................................................."1

1.,., We$(t of E!)t* +essel........................................................................................"1

1.,. W$n/ 2oa/$n......................................................................................................."1

1.,.; Anal*s$s of Stess..................................................................................................""

1.,.5 Dea/>We$(t Stess...............................................................................................""

1.,.9 Total 2on$t&/$nal Stess......................................................................................"-

1.,.10 a6$!&! Stess Intens$t*.................................................................................."-

1.,.11 +essel S&))ot....................................................................................................."-

REFERENCES.................................................................................................................."5

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Tables

Table 1.1 Inlet stea! of :&en'( to%e????????????????????...

Table 1." O&tlet 1 of :&en'( to%e??????????????????????.;

Table 1.- O&tlet " of :&en'( to%e??????????????????????.5

Table 1.4 S&!!a* of '(e!$'al en$nee$n /es$n of :&en'( to%e????????.19

Table 1., S&!!a* of !e'(an$'al en$nee$n 'al'&lat$ons????????????";

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1.0 DESIGN OF A QUENCH TOWER

1.1 Poble! State!ent

To Des$n a :&en'( to%e to 'ool (ot ases flo%$n at a ate of ,;-0 @( &s$n %ate

flo%$n at 15400 @(.

1." Geneal O#e#$e% on Q&en'( To%es

Q&en'($n of ea'to )o/&'ts $s so!et$!es nee/e/ fo s&//en 'ool$n< fo e!o#$n

$!)&$t$es an/ to a#o$/ s$/e ea't$ons. Cool$n b* l$:&$/ :&en'($n $s essent$all*

a''o!)l$s(e/ b* $nto/&'$n t(e (ot ases $nto a l$:&$/ 'onta't$n /e#$'e. W(en t(e l$:&$/

e#a)oates o ets (eate/ &)< t(e ene* ne'essa* to (eat &) t(e l$:&$/ $s obta$ne/ at t(e

e6)ense of (ot 'o!b&st$on ases< es&lt$n $n t(e e/&'t$on of as te!)eat&e. T(e

te!)eat&e of t(e ases /$s'(ae/ fo! t(e :&en'(e $s at t(e a/$abat$' sat&at$on

te!)eat&e of t(e ases $f t(e o)eat$on $s a/$abat$' an/ t(e as lea#es t(e :&en'(e %$t(

l$ttle o no %ate #a)o&s.

T(ee ae - t*)es of :&en'(es

S)a* to%es

+ent&$ s'&bbes

Pa'e/ to%es

1.".1 S)a* to%es

S)a* to%es o s)a* '(a!bes 'ons$sts of e!)t* '*l$n/$'al #essels !a/e of steel o

)last$' an/ noles t(at s)a* l$:&$/ $nto t(e #essels. T(e $nlet as stea! &s&all* entes t(e

botto! of t(e to%e an/ !o#es &)< %($le t(e l$:&$/ $s s)a*e/ /o%n%a/ fo! one o !oe

le#els. T($s flo% of $nlet as an/ l$:&$/ $n t(e o))os$te /$e't$on 7'o&nte '&ent flo%8o$l to%e. T(e$ f&n't$on $s to 'ool t(e s&)e(eate/ as $n

o/e to el$!$nate an* f&t(e ea't$on t(at !a* o''& an/ to also /e'ease t(e te!)eat&e

of t(e as.

1.- ATERIA2 3A2ANCE

Table 1.1 Inlet stea! of :&en'( to%e

COMPONEN

T

MASSS

FLOW,kg/hr

MASS

FRACTION

H2 + CH4 542 9%

Ethyl! "#$ 2&%

Pr'(yl! "#& $%

)*t-! $9.# "%

M-

0*t!1 44.9 "%

C5+ "9 2%

N2 &$." "%

CO2 "94 $%

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H2O "& $"%

th! "# "&%

(r'(! .9 "%

0*t! 9."" %

TOTAL 5$ "%

Table 1." O&tlet 1 of :&en'( to%e

COMPONEN

T

MASSS

FLOW,kg/hr

MASS

FRACTION

H2 + CH4 5.42E+2 "4%

Ethyl! ".#$E+$ 4"%

Pr'(yl! ".#&E+2 4%

)*t-! $.9#E+" "%

M-

0*t!1 4.49E+" "%

C5+ ".9E+2 $%

N2 &.$"E+" 2%

CO2 ".94E+2 5%

th! ".#E+$ 2%

(r'(! .9E+" 2%

0*t! 9.""E+ %

TOTAL $.95E+$ "%

Table 1.- O&tlet " of :&en'( to%e

COMPONE MASSS MASS

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NT FLOW

kg/hr

PERCENTA

3E

WATER "&4 "%

C(e!$'al en$nee$n /es$n

Paa!etes to be 'al'&late/ ae=

T(e s&)ef$'$al as #elo'$t*

T(e /$a!ete of t(e 'ol&!n

T(e /*>as>)ess&e /o)

T(e l$:&$/ (ol/&) $n t(e 'ol&!n

T(e a't&al )ess&e /o) %(en t(e be/ $s $$ate/ T(e o#eall as>)(ase tansfe &n$ts

T(e (e$(t of t(e as>)(ase tansfe &n$t

T(e (e$(t of t(e l$:&$/>)(ase tansfe &n$t

T(e o#eall (e$(t of a as>)(ase tansfe &n$t

T(e )a'e/ (e$(t

Res$/en'e t$!e

Data= T(e )a'$n &se/ $s ,0!! !etal )all $n an/o! )a'$n

C)B $s a )a'$n 'onstant< 0.;-< a B s)e'$f$' s&fa'e aea of )a'$n< 11". !"@!-,Pa.s

ReG B

1.050.00261103.730.9590

(10.951)(0.00003)

T(e Re*nol/s n&!be of t(e as ReGB ;1."4

T(e /*>)a'$n es$stan'e 'oeff$'$ent 7a !o/$f$e/ f$'t$on fa'to8< $s $#en b* t(e

e!)$$'al e6)ess$on=

B C)764

ReG 1.8

(ReG)0.08 8 72e$bson et al< 19,8

W(ee< B t(e /*>)a'$n es$stan'e 'oeff$'$ent 7a !o/$f$e/ f$'t$on fa'to8

C)B $s a 7)a'$n 'onstants8 '(aa'te$st$' of t(e )at$'&la t*)e an/ s$e of )a'$n B

0.;-. 7W$le* an/ a$!e)a'$n es$stan'e 'oeff$'$ent B 0.5

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1.4.11 Cal'&lat$on of /*>as>)ess&e /o)

T(e /*>as>)ess&e /o) 'an be 'al'&late/ fo! t(e /$!ens$onall* 'ons$stent 'oelat$n

e:&at$on $#en b*=

Po

B

V

a G ( G)2

()3 2 K!

7St$'(l!a$ et al< 19598

W(ee< B )a'$n (e$(t< !

POB t(e /*>as>)ess&e /o)< Pa

Po

B0.686112.63.73(1.05)2

(0.951)3 20.9900

Hen'e t(e /*>as>)ess&e /o)as>)ess&e /o)< Pa@! 11;.4

T(e l$:&$/ (ol/&) $n t(e 'ol&!n 0.;"4

T(e a't&al )ess&e /o) %(en t(e be/ $s $$ate/< Pa@! 4,

N&!be of tansfe &n$ts ,

T(e o#eall (e$(t of a as>)(ase tansfe &n$t< ! ".01

T(e )a'e/ 'ol&!n (e$(t< ! 10.,1

1., ECHANICA2 ENGINEERING CA2CU2ATIONS

T(e !ate$al of 'onst&'t$on $s 'abon steel.

1.,.1 Des$n Pess&e

Des$n )ess&e 7P$8 $s taen as 110 of o)eat$n )ess&e 7S$nnott< "00,a8 =

P$ B110

100 M "--.04; Pa B ",.-," Pa

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1.,." Des$n Te!)eat&e

H$(est O)eat$n te!)eat&e B -40oC

1.,.- $n$!&! +essel T($'ness

e B

"f

DP

$$

$$

7S$nnott< "00,b8

W(ee

%e$(t loa/s an/ ben/$n !o!ents $!)ose/ on $t b* t(e se)aato. 7S$nnott< "00,8

1.5.11.1 Skirt Support Thickness

Data

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S)e'$f$e/ s$t anle B 90 VC 7sta$(t '*l$n/e s$t8

a6$!&! allo%able stess

quench tower design

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