Oily Water Separator systems.pdf

8/14/2019 Oily Water Separator systems.pdf

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A Guide to

Effective & EfficientOperation of Oily Water Separator

A Guide to

Operating Oily WaterSeparator on Ships

OCM


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Marine Insight

A Guide to Operating Oily Water Separator on Ships

Publication date: May 2013

Autor: Moit San!uriEditor : "aune# $antaria

Publi%ed by: Marine &n%i!t'''()arinein%i!t(co)Grapic *e%i!n: Ani% Wan#ede+ &)a!e ,redit: -autice.po

/copyri!t %y)bol ,opyri!t 2013 Marine &n%i!t

-O&,E O "&GSAll ri!t% re%erved( -o part of ti% boo# )ay be re'ritten+ reproduced+%tored in a retrieval %y%te)+ tran%)itted or di%tributed in any for) or)ean%+ 'itout prior 'ritten per)i%%ion of te publi%er(

-O&,E O 4&A5&4&6

e autor% and editor% ave )ade every effort po%%ible to en%ure teaccuracy of te infor)ation provided in te boo#( -eiter te autor% andMarine &n%i!t+ nor editor% or di%tributor%+ 'ill be eld liable for anyda)a!e% cau%ed eiter directly or indirectly by te in%truction% containedin ti% boo#+ or te e7uip)ent+ tool%+ or )etod% de%cribed erein(

Mohit Sanguri is a Marine Chief Engineer (Class I Unlimited Power).He has worked as a marine engineer on various types of ships in some ofthe est shipping !ompanies. He is also the "uthor of two other eooks #

$%he &asi!s of Pipes and &ends on 'hips $ " *uide to 'low 'teaming of 'hips

About The Author

Chief Engineer Mohit Sanguri

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troductioConsidering the introduction of various stringent

regulations related to marine pollution, efficient

operation and maintenance of oily water separatorson board ships is a must.

This guide explains a normal Two-Stage Oily Water

Separator OWS! as it"s the most widely used one on

ships. #t is to note that except the constructional and

design factors, OWS of different types have almost

the same functional and operational characteristics.

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Content

Construction & Working2 Operating Procedure

3 Design Factors

4 Operational Factors5 Bilge Management

Care & Maintenance

! "ttitude# "ptitude &$ousekeeping

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Oily 'ater %eparator or OWS a% it i% co))only #no'n i% ani)portant )acinery on %ip%( &t i% u%ed to %eparate )a.i)u)a)ount of oil particle% fro) te bil!e 'ater+ 'ic i% to bedi%car!ed overboard fro) te en!ine roo)+ car!o old bil!e%+oil tan#% and oil conta)inated %pace%(

Chapter1..............................

Oily Water Separator:Construction and

Working


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o )ini)i8e te oily content in te bil!e 'ater+ MA"PO4 a% are!ulation under 9A--E &;'ic li)it% te oil content in tebil!e 'ater tat ve%%el% can le!iti)ately di%car!e into te %ea(&t i% no' a co)pul%ory re7uire)ent for all ve%%el% to ave an oildi%car!e )onitorin! and control %y%te) alon! 'it an Oily

Water Separator(ere are nu)erou% varietie% of OWS in te )ar#et and eac a%it% o'n peculiaritie% and proble)%( e popular type of bil!e%eparator 'ic are available in te )ar#et are:

Sin!le %ta!e OWS/old type

'o Sta!e OWS/,ar!o %ip%

ree %ta!e 1pp) %eparator/,rui%e %ip%+ ferrie%

4i!t 'ei!t nder%tandin! te "e!ulationAny di%car!e into te %ea of oil or oily )i.ture% fro) %ip% of?00 !ro%% tonna!e and above %all be proibited e.cept 'en allte follo'in! condition% are %ati%fied:

e %ip i% proceedin! en route

e oily )i.ture i% proce%%ed trou! an oil filterin!e7uip)ent

e oil content of te effluent 'itout dilution doe% note.ceed 1< part% per )illion

e oily )i.ture doe% not ori!inate fro) car!o pu)p@roo)

bil!e% on oil tan#er%

e oily )i.ture+ in ca%e of oil tan#er%+ i% not )i.ed 'it oilcar!o re%idue%

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&n Antarctic and oter environ)entally %en%itive area%+ anydi%car!e into te %ea of oil or oily )i.ture% fro) any %ip %all beproibited(

,on%truction and Wor#in! of OWSOWS con%i%t% of )ainly tree %e!)ent%:

A(((((((((((((Separator >niti% unit con%i%t% of catc plate% in%ide a coar%e

%eparatin! co)part)ent and an oil collectin! ca)ber(

e oil avin! a den%ity lo'er tan tat of te'ater+ ri%e% into te oil collectin!co)part)ent( e re%t of te non@flo'in! oil )i.ture%ettle% do'n into fine %ettlin! co)part)ent after pa%%in!bet'een te catc plate%(

A control valve /pneu)atic or electronic relea%e% te%eparated oil in to te de%i!nated OWS %lud!e tan#(eater )ay be incorporated in ti% unit for %)oot flo' and%eparation of oil and 'ater( ir%t %ta!e of OWS elp% inre)ovin! %o)e py%ical i)puritie% to acieve fine filtrationin te later %ta!e(

1

After a period of ti)e+oil 'ill %eparate andcollect in te oilcollectin! ca)ber(

e oil content of'ater 'ic pa%%e%

trou! ti% unit i%around 100 part% per)illion of oil(

Stage 1



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A(((((((((((((1e 2ilter >niti% i% a %eparate unit 'it it% input co)in! fro) tedi%car!e of te fir%t unit(

i% unit con%i%t% of tree %ta!e% B filter %ta!e+ coale%cer%ta!e and collectin! ca)ber( e i)puritie% and particle%are %eparated by te filter and tey %ettle at te botto)for re)oval(

e%e lar!e oil )olecule% ri%e above te )i.ture in tecollectin! ca)ber and are re)oved 'en re7uired(

e output fro) ti% unit %ould be le%% tan 1< pp) tofulfill te le!al di%car!e criteria(

&f te oil content in 'ater i% )ore tan 1< pp) ten)aintenance 'or# %uc a% filter cleanin! or rene'al of filter%i% to be done a% re7uired(

2

In the second stage, thecoalescer induces

coalescence processin which oil droplets are

joined to increase thesize by breaking downthe surface tensionbetween oil droplets inthe mixture.

Stage 2 (image Credit- Nauticaexpo



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A(((((((((((((Oil ,ontent Monitor & ,ontrol >niti% unit function% to!eter in t'o part% B )onitorin! andcontrollin!( e pp) of oil i% continuou%ly )onitored by Oil

,ontent Monitor /O,MC if te pp) i% i!er tan te pre@deter)ined unit+ it 'ill !ive an alar) and feed data to tecontrol unit(

ere are nor)ally 3 %olenoid valve% co))anded by tecontrol unit( e%e are located in te fir%t unit oil collectin!ca)ber+ %econd unit oil collectin! ca)ber and one indi%car!e %ide of te oily 'ater %eparator 'ic i% a 3 'ayvalve(

e 3 'ay valve inlet i% fro) te OWS di%car!e+ 'ere oneoutlet i% to overboard and %econd outlet i% to OWS %lud!etan#( Wen O,M !ive% alar)+ 3 'ay valve di%car!e% oily)i.ture in te %lud!e tan#(

An oily 'ater %eparator clear% te bil!e 'ater of oily content tobrin! it in%ide te acceptable ran!e to di%car!e it overboard( An

oily 'ater %eparator i% a )acinery of %uc i)portance tat it i%andled only by te 2nd or cief en!ineer( /o'ever+ te dutyen!ineer )i!t al%o be a%#ed to operate under %upervi%ion(

3

e control unitcontinuou%ly )onitor%te output %i!nal of

O,M and in ca%e ofalar)+ it 'ill prevent oily'ater to !o overboardby )ean% of operatin! 3'ay %olenoid valve(

OCM



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Chapter2..............................

Oily Water Separator:Operating Procedure


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An oily 'ater %eparator can only be operated 'en te %ip i%%ailin! and en route( Accordin! to MA"PO4+ te oil content of teeffluent )u%t be le%% tan 1< pp) and te %ip a% in operationan oil di%car!e )onitorin! and control %y%te) and oily@'ater%eparatin!Dfilterin! e7uip)ent( &n ca%e of failure to follo' any of

te above )entioned rule%+ te %ip 'ill be fined and %topped+and te cief or 2nd en!ineer can be i)pri%oned(

5ecau%e of %uc i! ri%#%+ operatin! an oily 'ater %eparator%ould be done 'it ut)o%t preci%ion to )ini)i8e te ri%#% of)arine pollution( ou! a o' to OperateF; !uide i% al'ay%po%ted near te oily 'ater %eparator+ tere are fe' point% to be#ept in )ind and follo'ed to prevent any )i%ta#e(

Operatin! Proceduree follo'in! point% are to be follo'ed 'ile operatin! OWS(

OWS overboard )anual di%car!e valve i% to be #ept loc#edand #ey% are to be #ept 'it te cief en!ineer( Open te

loc# and overboard valve( Open all te oter valve% of te%y%te)

Open te de%ired bil!e tan# valve fro) 'ic te oily 'ater)i.ture i% to be di%car!ed fro) te OWS

Open air if te control valve% are air operated

S'itc on te po'er %upply of te control panel and O,Munit

ill te %eparator and filter unit 'it fre% or %ea 'ater toclean up and pri)e te %y%te) till te 'ater co)e% out fro)vent of %econd %ta!e

Start te OWS %upply pu)p 'ic i% a la)inar flo' pu)p andone tat 'ill %upply te oily 'ater )i.ture to OWS



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Ob%erve te O,M for pp) value and #eep cec#in! %oundin!of bil!e tan# fro) 'ere OWS i% ta#in! %uction and al%o ofte OWS %lud!e tan#

A %#in valveD%a)ple valve i% provided u%t before overboard

valve and after te 3@'ay valve( $eep a cec# on te %a)plefor any effluent and clarity

$eep a 'atc on te %ip %ide at te overboard di%car!evalve

After te operation+ S'itc off te po'er and %ut and loc#te overboard valve

$ey% to be anded over to te cief en!ineer

Entry to be )ade by cief en!ineer in te Oil "ecord 5oo#/O"5'it %i!nature of operatin! officer+ cief en!ineer andte )a%ter

*o read our eboo# on Operatin! procedure% of all en!ine roo) Macinery(

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Chapter3..............................

Oily Water Separator:he !esign Factors


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Oily Water Separator% are one of te )o%t i)portant yetne!lected e7uip)ent on board %ip%( "evered and feared ali#e+)arine en!ineer% are often afraid to u%e it+ and 'ant to #eep itunu%ed and 'or#in! %o tat tey can %o' it to te Port State,ontrol Officer /PS,O and %tay on te %afer %ide(

5a%ed on %i)ple 'or#in! principle% and de%i!ned to be reliableand le%% labor inten%ive+ oil 'ater %eparator% are o'evertrouble%o)e and de)andin! to en!ineer% due to laterH% lac# of#no'led!e+ proper trainin!+ operational ne!li!ence and%o)eti)e% apaty(

o'ever proper care+ )aintenance+ correct trouble%ootin! andefficient %tartin!D%toppin!can #eep it 'or#in! properly and)a#in! life ea%ier and %afer( Wit %tricter control andPS,in%pection%co)bined 'it %trin!ent penaltie% includin! cri)inalaction a!ain%t te operatin! cre'+ itI% in te intere%t of )arine

en!ineer% to #eep te OWS 'or#in! properly(

A lot a% been %aid and 'ritten about te inade7uacy of %o)e ofte )ar#et e7uip)ent and e%pecially to%e tat ave beenretrofitted in old %ip% in %e)inar% and foru)%(

o'ever+ te %ea!oin! )arine en!ineer% do not ave acce%% tote%e %e)inar% and teir voice% are often uneard( &n te

ab%ence of a %y)patetic ear+ )arine en!ineer% u%t endeavor to#eep te e7uip)ent runnin! durin! teir contract ti)e; andab%tain fro) co)plainin! for te fear of victi)i8in!(

http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/http://www.marineinsight.com/http://www.marineinsight.com/http://www.marineinsight.com/guides/http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/


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2actor% affectin! %eparation in OWSe oil 'ater %eparator /OWS i% de%i!ned to 'or# properlyunder ideal condition%C o'ever te %ip i% never under idealcondition and tere are variou% %ource% of conta)ination in te

bil!e 'ater( e bil!e 'ater i% a )i.ture of variou% !rade% of oil in'ater+ alon! 'it %u%pended %olid%+ ru%t+ ce)ical%+ deter!ent%+%oot+ paint cip% and car!o du%t etc(

&n vie' of %uc a co)ple. %cenario it i% nece%%ary to ave te#no'led!e of variou% para)eter% and factor% tat influence te%ati%factory operation of OWS(

4etI% ta#e a loo# a% to o' te de%i!n factor% affect te OWSperfor)ance(i% include% te ba%ic 'or#in! principle of te

OWS and te enance)ent% )ade for )arine conte.t(

e Oily Water Separator i% u%ed to re)ove oil fro) te bil!e'ater prior to di%car!in! it overboard( &t 'or#% on te principleof Sto#e% la' and ba%ically %eparate% te t'o co)ponent%utili8in! teir difference in %pecific !ravitie%(

e OWS for )arine u%e are opti)i8ed to )a#e te) %)aller in%i8e due to %pace con%traint%( Additional co)ponent% are fittedto elp 'it te %eparation proce%% but te #no'led!e of teba%ic de%i!n factor% i% beneficial(

Design

Operational House Keeping

Bilge management

!uipment Kno"le#ge

OWS$re" Attitu#e

$are an# Maintenance



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1e rate of ri%e a% per %tro#eH% la' i% a% follo'%:e Sto#eH% 4a' !enerally %tate% tat te velocity or ri%e andence te %eparation rate i% directly proportional to tedifference in den%ity of te oil and te continuou% fluid+ and te

%i8e of te droplet% of oil(

Vt = [(g)( w o )(d2)] / [(18 x w )]

Vt = the rise rate of the oil droplet (cm/s or ft/sec)

g = acceleration due to gravity (cm/s2 or ft/s2)

w = density of water at the design temperature (g/cm3 or lbm/ft3)

o = density of oil at the design temperature (g/cm3 or lbm/ft3)

d = oil droplet diameter (cm or ft)

w = absolute viscosity of the water (g/cms or lbm/fts)

&t al%o %tate% tat rate of ri%e i% inver%ely proportional to tevi%co%ity of te %urroundin! fluid( We infer te follo'in! fro) tefa)ou% la' :

*en%ity of Oil: 4i!t oil i% avin! i!er rate of ri%e taneavier oil and terefore it i% ea%ier to %eparate( i%infor)ation i% u%eful to adu%t and lo'er te flo' rate'en eavier oil conta)ination i% %u%pected(

*en%ity of ,ontinuou% 2luid: "ate of ri%e 'ill be i!er'en continuou% fluid i% %ea 'ater in%tead of fre%'ater or conden%ate( i% infor)ation i% u%eful and 'e

can di%car!e te conden%ate drain% into dedicatedclean drain tan#% in%tead of bil!e%(

=i%co%ity of ,ontinuou% 2luid: A% rate of ri%e i% inver%elyproportional to te vi%co%ity of te continuou% fluid+te OWS perfor)ance i% better 'en continuou% fluid i%fre% 'ater( A% ti% deduction i% contrary to te aboveone it i% a co)pro)i%e bet'een te t'o but it doe% notconcern u% )uc a% 'e donHt really ave )uc controlon 'at !oe% to te bil!e% a% per te ori!inal de%i!n(

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Si8e of Oil *roplet%: e lar!er te dia)eter of te oildroplet% te better i% te rate of %eparation( i%infor)ation i% very elpful and 'e can a%%i%t te OWSby avoidin! %)all drop% of oil by )ecanical a!itation

and e)ul%ification(

1e)perature: i% i% anoter factor 'ic i% i)portanta% it affect% te den%ity and vi%co%ity directly(

4o' te)peratureof te continuou% fluid inder%te %eparation of oil due to additional vi%cou% dra!in vie' of te increa%ed vi%co%ity of continuou%

fluid in cold te)perature( Oil %eparation i% better in'ar)er te)perature% and %li!tly increa%in! tete)perature of te bil!e 'ater 'ould !ive better%eparation(

i% infor)ation i% i)portant a% 'e can increa%e%eparation rate by 'ar)in! te bil!e 'ater in teoldin! tan#% or eatin! inco)in! fluid by %tea)coil% fitted in %o)e of te OWS(

3i! te)peraturere%ult in te for)ation ofe)ul%ion by )ecanical a!itation 'ic i% )oretan in lo'er te)perature( i% infor)ation i%i)portant a% 'e %ould not eat te bil!e oldin!tan# 'en te %ip i% rollin! e.ce%%ively or 'ere

'e %u%pect )ecanical a!itation(

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Chapter4..............................

Oily Water Separator:he Operational

Factors


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Operational $no'led!e and correct operational procedure% are!eneric and not e7uip)ent %pecific( ,orrect operational#no'led!e i% re7uired for all )acinery on %ip% to run properlyand te Oily Water Separator i% no e.ception( Marine en!ineer%'or# 'it different type% of Oily Water Separator% trou! teir

%ea career and eac type a% it% o'n uni7ue feature%(

E7uip)ent %pecific #no'led!e i% e%%ential for te correctoperation of oily 'ater %eparator and can be learnt fro) teoperational )anual on board( o'ever a !eneric #no'led!e i%al%o re7uired a% te ba%ic 'or#in! principle i% e%%entially te%a)e(

An idea borro'ed fro) e.i%tin! %ore tecnolo!y+ te Oily WaterSeparator% for %ip% are de%i!ned to 'or# properly under idealcondition%( o'ever %ip% do not ave ideal condition%+ andterefore %ipH% %taff %ould con%ider te follo'in! operationalfactor% 'ic affect te perfor)ance of Oily Water Separator on%ip%:

void E)ul%ion%: E)ul%ion% are for)ed 'en te inter@facial ten%ion bet'een t'o li7uid% i% reduced by certain)ean% %ufficiently to allo' droplet% of one li7uid todi%per%e in anoter( Mecanical a!itation+ %earin!force%+ %olvent%+ ce)ical%+ %urfactant% and tepre%ence of particulate )atter can all reduce inter@facial ten%ion and re%ult in for)ation of e)ul%ion(

void ,e)ical e)ul%ion%:e ce)ical e)ul%ion i%for)ed by te addition of %o)e ce)ical% in te 'ater(e%e ce)ical% act a% %urfactant% and tey old teoil drop% to!eter in e)ul%ified %tate( e %urfactant%)ay be te deter!ent% u%ed for cleanin!+ al#alinece)ical% u%ed for boiler cleanin! and conditionin! etc(

void %econdary di%per%ion: Mecanical e)ul%ion% areof pri)ary and %econdary type%( e pri)ary e)ul%ion%are lar!er drop% of oil di%per%ed in 'ater and !enerally%eparated 'itin 2? our%( e %econdary e)ul%ion%

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are fine droplet% of oil tat are ter)odyna)ically%table and do not %eparate( e %econdary di%per%ion i%cau%ed by turbulent condition%(

void %u%pended %olid%: Su%pended %olid% cau%e%tabili8ation of e)ul%ion and cau%e proble)% in%eparation of te oil fro) te bil!e 'ater( Su%pended%olid% can be )ud+ boiler %oot and car!o re%idue%%uc#ed fro) te blo'er%( e %u%pended %olid% !etcoated 'it oil and %tabili8e te e)ul%ion( -eutrallybuoyant %olid% tat neiter ri%e nor fall are )o%ttrouble%o)e a% it i% difficult to re)ove te)( ey al%o!enerate te i! pp) alar)(

void 1urbulence: OWS need% la)inar flo' to operateopti)ally a% per it% de%i!n( Avoid u%in! OWS in ti)e% ofeavy rollin! and #eep all line valve% fully open to avoid!eneratin! turbulence(

"ollin! )otion+ retrofittin! on old pipeline% andinade7uate openin! of te %uction line valve% can leadto turbulent flo' in%ide te OWS 'it re%ultin! fall inOWS capacity due to for)ation of e)ul%ion(

So)eti)e% due to turbulence %o)e of te oil droplet%beco)e le%% tan J )icron% and are affected by terando) )otion of te 'ater particle%( i% rando))otion i% called a% 5ro'nanian )otion and it nullifie%

te force% of buoyancy and te oil drop% fail to ri%e(

void Particulate Matter: ine particulate )atter li#e%oot+ ru%t+ )icrobial conta)ination of bil!e 'ater etc(al%o act a% e)ul%ifyin! a!ent( Altou! )o%t of te%oot of te boiler 'a%in! %ettle% do'n in te bil!eoldin! tan#+ fine %oot particle% /1) or le%% 'ill !ivete bil!e 'ater a blac#i% appearance( e%e

particulate )atter 'ill not only fool te pp) )eter intoactivatin! te i! pp) alar) but 'ill al%o py%icallyact a% e)ul%ifyin! a!ent(

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Opti)al u%e of ,e)ical%: So)eti)e% it i% re7uired tou%e %pecial ce)ical% called e)ul%ion brea#er% to%eparate te oil fro) te 'ater and relea%e free oil( &fe)ul%ion brea#er ce)ical i% u%ed+ care %ould be ta#en

tat it i% u%ed a% per te in%truction% !iven by te)anufacturer %o tat te e)ul%ion doe%Ht !o 'or%e(So)eti)e% puttin! )ore tan te reco))endeda)ount can 'or%en te proble)(

*o Proper 2iltration: &f tere i% lar!e a)ount of %olidparticle%+ floatin! )edia+ ute etc( in te bil!e 'ater+ it

%ould be properly re)oved u%in! %trainer% to avoidfoulin! of te filter )edia(

3eat te influent: eatin! te influent reduce% tevi%co%ity of te continuou% )edia cau%in! better%eparation(

2ill up OWS prior u%e: Prior to operatin! te OWS andallo'in! te bil!e 'ater to enter al'ay% en%ure tat it i%filled up 'it clean 'ater and all air poc#et% ave beenre)oved( i% i% i)portant a% air poc#et% can confu%ete capacitive %en%or% and can )a#e auto)ation !oay'ire(

5ac# 2lu%: 5ac# flu%in! of te OWS %ould be done a%per te reco))ended fre7uency !iven by te)anufacturer if tere i% a provi%ion for doin! %o a% itincrea%e% te life of te filter )edia(

,lean Sen%or%: re7uent cleanin! of te electronicinterface %en%or% 'ould en%ure te correct operation+proper oil re)oval and %arp cuttin! off en%urin! le%%di%car!e of 'ater to %eparated oil tan#(

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"e)ove ccu)ulated Oil: Apart fro) te auto)ated oilre)oval any oter accu)ulated oil %ould be re)ovedfro) te OWS ca)ber% re!ularly(

Proper Operatin! Procedure: Ma#e %ure tat teoperatin! procedure of OWS i% follo'ed in a proper%tep@by@%tep and %y%te)atic procedure(

Proper OWS Maintenance:-eedle%% to %ay+ proper)aintenance of te OWS a% per te in%truction% of te)anufacturer 'ould #eep it in %ip %ape condition(

Get our eboo# on Operatin! procedure% of all *ec# Macinery and an#erE7uip)ent

13

14

15

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Chapter5..............................

Oily Water Separator:

Bilge Management


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-o )atter 'at e7uip)ent i% in%talled onboard %ip%+ if te bil!e)ana!e)ent i% not proper te Oily Water Separator /OWS i%bound to )alfunction( Good bil!e )ana!e)ent practice% elp% inopti)i8in! te perfor)ance of te Oily Water Separator(

&n te en!ine roo) te bil!e% and bil!e 'ell% are located at tevery botto) of te en!ine roo) for collectin! oil and 'ater fro)lea#a!e%+ conden%ate and 'a%te% %o tat tey can be pu)ped tote bil!e oldin! tan#(

,lean bil!e% are te fir%t line of defen%e a!ain%t )arine pollution(All %ea%oned )arine en!ineer% #no' tat if te bil!e% are cleanand dry+ al)o%t all te )aor 'orrie% concernin!Port State

in%pection% are al)o%t over( *irty en!ine roo) bil!e% are one ofte bi!!e%t detainable deficiencie% in port %tate in%pection%(

Mentioned belo' are %o)e of te !ood practice% and tip% forefficient bil!e )ana!e)ent:

>%ed or 'a%te oil %ould not be intentionally put in te bil!e%or bil!e tan#(

All oil %ould be collected and put in te %eparated oil tan# ordirty oil tan#( ereafter it can eiter be burnt in teincinerator or landed a%ore(

*i%carded ce)ical% %ould not be di%po%ed off in te 5il!etan# a% p of 'ater above 10 and belo' ? can cau%e

ce)ical e)ul%ification of te bil!e 'ater and lead todifficulty in %eparation(

Put drip tray% 'ere tere are lea#a!e% and tereafterrectify and %top te lea#a!e%(

Pri)ary bil!e tan# i% provided in ne' %ip% and ti% %ouldbe u%ed properly and not bypa%%ed( >%e of te pri)ary bil!e

tan# increa%e% te effectivene%% of te Oily Water Separatora% )o%t of te oil i% re)oved ere( e pri)ary bil!e tan#elp% in %eparation of te oil fro) te 'ater and te oil can

http://www.marineinsight.com/marine/environment/effects-of-marine-pollution/http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/http://www.marineinsight.com/misc/maritime-law/16-things-that-can-detain-your-ship-during-port-state-surveys/http://www.marineinsight.com/sports-luxury/equipment/construction-and-working-of-waste-oil-incinerator/http://www.marineinsight.com/tech/auxiliary-machinery/oily-water-separator-construction-and-working/http://www.marineinsight.com/http://www.marineinsight.com/http://www.marineinsight.com/guides/http://www.marineinsight.com/marine/environment/effects-of-marine-pollution/http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/http://www.marineinsight.com/misc/maritime-law/the-ultimate-guide-to-port-state-control-psc-inspection-on-ships/http://www.marineinsight.com/misc/maritime-law/16-things-that-can-detain-your-ship-during-port-state-surveys/http://www.marineinsight.com/sports-luxury/equipment/construction-and-working-of-waste-oil-incinerator/http://www.marineinsight.com/tech/auxiliary-machinery/oily-water-separator-construction-and-working/


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be vi%ually %een and put in dirty oil tan# and te cleaner bil!e'ater can be put to te bil!e tan#( Stea) coil% are providedin te pri)ary bil!e tan# and tey can be u%ed for effective%eparation(

>%e clean drain tan# effectively( &n tropical cli)ate% tere i%conden%ation of )ore tan 1@2 cubic )eter% per day andti% 'ater if allo'ed to !o to te bil!e tan# 'ill increa%e teload of te oily 'ater %eparator( A% ti% i% )o%tly clean'ater+ it %ould not be allo'ed to !o to te bil!e tan#Cin%tead it %ould be put to te clean drain tan# andtereafter properly di%po%ed( e lea#a!e% fro) te fre%'ater and %ea 'ater pu)p% %ould al%o be put in te clean

drain tan#(

=ertical pipeline% cau%e te %earin! of te upco)in! 'aterand %ould be avoided a% )uc a% po%%ible(

>%e )ecanical %eal% 'ere po%%ible( Mecanical %eal%tou! e.pen%ive lead to cleaner en!ine roo)% a% tere i%)ini)al or no lea#a!e% fro) te !land%(

&n conventional !land type pu)p% tou! te drippin! 'ater)ay appear in%i!nificant+ te %)all lea#a!e% can lead tobuildin! up of lar!e a)ount of 'ater(

*urin! ne' buildin!+ repair and retrofittin! it )u%t bere)e)bered tat+ inlet pipin! %ould be %)oot and

'itout )uc undue bend% to cau%e turbulence(

,onden%ate fro) acco))odation A, and E," A, %ouldnot be put in te bil!e%+ but %ould be put in %eparate tan# ordirectly overboard(

&nlet pipin! %ould ave te lea%t a)ount of valve%+ bend%and oter fittin!%( Were po%%ible %trai!t line valve% li#e

!ate valve% %ould be u%ed over an!le valve% and!lobevalve% to avoid turbulence(

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e inlet pipin! u%t before te entry to te Oily WaterSeparator %ould be %trai!t for a len!t e7ual to ten ti)e%te dia)eter of te pipin! and %ould be %ufficiently %i8ed toavoid pre%%ure drop(

S)all dia)eter inlet pipeline% cau%e %earin! of 'ater and)a#e te oil droplet% %)aller( e%e droplet% are difficult tore)ove later terefore te inlet pipeline %ould be of properdia)eter(

e boiler blo' do'n %ould not be done in te bil!e% but tobe done overboard a% te conditionin! ce)ical% can cau%ece)ical e)ul%ion%(

So)eti)e% tere i% %o)e in!re%% of air 'ic i% !enerallyunnoticed a% te po%itive di%place)ent pu)p% can andle%o)e a)ount of air( Any fall in vacuu) %ould beinve%ti!ated a% te%e air poc#et% can )a#e te capacitanceoil probe% !ive 'ron! feedbac# and fal%ely activate te oilrelea%e valve%(

5il!e cleanin! ce)ical% )u%t be oily 'ater %eparatorco)patible( Wron! ce)ical% 'ill )a#e te oil %oluble in'ater and could never be %eparated(

*u%t and car!o re%idue %ould not be drained to te bil!e%(ey %ould be pic#ed up 'it a broo) and %cooped and notblo'n by air into te bil!e%( e%e particulate )atter% can

cau%e %tabili8ation of te e)ul%ion%( Soot fro) te boiler%and econo)i8er% %ould be put in a %eparate tan# anddi%po%ed off(

Moppin! 'ater containin! deter!ent% a% 'ell a% and 'a%'ater %ould not be put in te bil!e tan#%(

&f care i% ta#en in controllin! entry of 'ater and 'a%te in te

bil!e% tere 'ill not be any proble) in runnin! te Oily WaterSeparator a% te later operate% in it% de%i!ned ran!e(



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Chapter6..............................

Oily Water Separator:Care and Main enance


28/34

e !eneral care and )aintenance re7uired to #eep te OWSrunnin! %)ootly i% a% follo'ed:

Avoid vibration /%elf or %ip !enerated by u%in! %teadybrace%( E.ce%%ive vibration% )ay lead to da)a!e to pipe%

and OWS %tructure(

Wile )aintenance i% bein! perfor)ed in%ide te OWS+ donot da)a!e te anti@corro%ive %urface /nor)ally provided'ere te li7uid i% in contact 'it te body by doin!'eldin! or bru%in!(

$eep cec#in! te bac# pre%%ure for te coale%cer% and if

te pre%%ure e.ceed% te rated pre%%ure+ rene' te %a)e(

Periodic cleanin! of OWS to be perfor)ed by re)ovin! any'ater %cale+ %lud!e+ du%t+ bacteria etc( fro) te internal%urface%(

*onIt avoid )aintenance routine% on te bil!e pu)p a%increa%e in te 'ear of te pu)p 'ill re%ult in lea#a!e of fine!rain% 'ic are difficult to be %eparated by filter% and 'ic'ill later affect te %eparatorI% perfor)ance(

,lean te oil level %en%or electrode at re!ular interval(

A filter i% in%talled on te %a)ple 'ater inlet to preventfoulin! by forei!n obect% 'ic )ay cau%e )ea%urin! error(

&f te flo' of %a)ple 'ater i% in%ufficient+ re)ove and cleante filter(

e %olenoid valve )ay )alfunction due to foulin!+'ic)ay occur after a lon! period of operation( e %olenoidvalve )u%t be cleaned at re!ular interval(

e outlet pipe of te OWS /di%tance pipe bet'een OWSand overboard di%car!e valve %ould be opened up once a)ont to cec# for trace% of oil( &f found+ it can be becau%e



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30/34

Chapter7..............................

Oily Water Separator:" i ude# "p i ude $%ousekeeping


31/34

-o )atter 'at #ind of e7uip)ent u%ed on board %ip%+ it need%correct operation and trainin! to run it opti)ally+ alon! 'it acre'I% po%itive attitude to'ard% te )arine environ)ent(

A re%pon%ible cre'+ 'ic include% !ood ou%e#eepin! for a

cleaner en!ine roo)+ i% a )u%t to reduce production of oily'ater(

Se!re!ation of Wa%te%: *o not )i. %lud!e andbil!e%( Even a bit of %lud!e can conta)inate lar!ea)ount of bil!e 'ater( &n %o)e port% even di%car!e oftreated %e'a!e i% not per)itted due to local re!ulation

and terefore in ab%ence of dedicated %e'a!e oldin!tan#+ treated %e'a!e i% put in bil!e oldin! tan#(

i% %ould be avoided a% it 'ould be i)po%%ible to runte Oily Water Separator tereafter 'itout cleanin!te tan#(

"e%trict *raina!e of ,e)ical%: 4ot )any ce)ical%are u%ed in en!ine roo) for %pecial purpo%e% %uc a%'ater conditionin!+ corro%ion inibition+ ru%t re)oval+cleanin!+ de!rea%in! etc(

o'ever care %ould be ta#en to collect te%ece)ical% and di%po%in! te) properly( Allo'in! all

#ind of ce)ical% to run free into te bil!e% i% not !oodou%e#eepin!( More over te p of 'ater above 10 andbelo' ? can cau%e ce)ical e)ul%ification(

*eter!ent *i%po%al: *eter!ent% are u%ed for)oppin! and %oap 'a%in! of bul#ead% and %ucarea%( Generally te%e are te %a)e deter!ent% 'e u%e

at o)e or a%ore(

e%e deter!ent% act a% %urfactant% and cau%ee)ul%ion of oil in 'ater( *i%po%in! )op 'ater



32/34

%eparately or u%in! 7uic# brea# deter!ent% 'ould elp%i!nificantly to'ard% better %eparation(

void prolon!ed %tora!e: Prolon!ed %tora!e of tebil!e 'ater cau%e% )odification in te nature of free oil(

-or)ally oil 'ater )i.ture 'en allo'ed to %tand for%o)eti)e /%ay 2? our% %eparate% into a layer of oil ontop of 'ater called a% free oil(

i% free oil i% ea%y to re)ove but lon! retention of tebil!e 'ater can cau%e )odification in te propertie% offree oil due to o.idation and )icrobial action( &f ti%)odification occur% ten it i% difficult to re)ove te oil(

,ollect lea#a!e%: En%ure tat )ini)u) of oil reace%te bil!e 'ell% and if te oil 7uantity i% )ore in a )i.ture/of oil and 'ater put it in %eparated oil tan#(

Al'ay% re)e)ber tat te Oily Water Separator i% nota purifier(

Special Precaution%: *rain% of Air bottle 'iccontain% %o)e a)ount of oil %ould not be directed tobil!e% /a% co))only con%tructed(

Arran!e)ent can be )ade to divert or collect ti% oily'ater )i.ture in te %lud!e tan#(

En!ine Wa% roo): Ma.i)u) nu)ber of %ip% areprovided 'it a %eparate 'a% area in te en!ine roo)(Since en!ine cre' ob involve% !rea%e and oil+ te 'a%ba%in drain of %uc area to be connected to te %lud!etan# rater tan bil!e%(

$eep 6our%elf >pdated: &t i% very i)portant for

%eafarer% to #eep te)%elve% updated 'it all telate%t infor)ation related to MA"PO4 "e!ulation% anddevelop)ent% in tecnolo!y of e7uip)ent %uc a%OWS(

21
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MA"PO4 Pled!e: Mo%t of te co)panie% aveintroduced a MA"PO4 pled!e for) 'ic a% to be%i!ned by te cre' )e)ber%(

e pled!e %tate% tat te te cre' 'ill not violate any)ariti)e re!ulation% under any circu)%tance%( &n ca%ete cre' i% eld re%pon%ible for te %a)e+ %trict action%'ill be ta#en a!ain%t te)( &tI% terefore veryi)portant for te cre' to re%pect and follo' te pled!etrou!out te entire period of teir e)ploy)ent(

Conclusion

A% de%cribed in ti% !uide+ a variety of factor% need to be ta#eninto con%ideration for %)oot and efficient operation of oily

'ater %eparator% on %ip%(

Mariti)e profe%%ional% 'or#in! on %ip% )u%t ta#e %pecial careand re%pon%ibility 'ile andlin! ti% i)portant en!ine roo))acinery(

&f you ave any 7ue%tion% re!ardin! OWS+ feel free to contact u%at infoK)arinein%i!t(co)

"ace%oo&' (oin the Wor#!)s Most *i&e!aritime Page ( 52k+ fans)+witter ' "o##ow ,s

-oog#e - Join our Circle*in&e!/n ' (oin ,s an! 1 otheraritime Professionals

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Documents

Oily Water Separator systems.pdf