# OAR Box 1814

Propped by Ollie Stewart



### Document

Number: 

# 49 ) ll-B-2 7

Docket Number: 

# A-88-0 2 p. i i

Printi'd 11/7/20087:22:08AM

Sheet 49of 63

# MRI ® P. 2 

## A-88-0 2 

# Fl l E PfiP Y ^ ^ z 

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I L
. L U U I MIDWES TRESEARC H INSTITUT E Suit e 35 0 40 1 Harriso n Oak

s Boulevard Cary

. Nort h Carolin a 2751 3 Telephon e (919 ) 467-521 5 Facsimil e (919 ) 467-806 0

Date : June 11 , 198 7

(Finalize dJul y

23 , 1987 ) Subject : Sit e Visit—Consolidate dEngravers , Charlotte , Nort hCarolin a

Chromiu m Electroplatin g NESHA P EPA Contrac t 68-02-3817 ; ESE D Projec t 85/02 a MR I Projec t 7717- K
From : Randy

Stra1t/1 > Robi nBarke r To : A l Vervaer t

ESED/ISB/SS S (MD-13 ) U . S . Environmenta l Protectio nAgenc y Researc hTriangl e Park , N.C . 2771 1
I . Purpos e Th e purpos e o f th e visi t wa s t o evaluat e th e feasibilit y o f conductin g an emissio ntes t o n a mis t eliminato r wit ha singl e se t o f overlapping-typ e blade s use dt o contro l chromi c aci demission s fro m tw o har dchromiu

m platin g tanks . Th e emissio ntes t dat a ar e neede dt o compar e th e chromi c ad dmis t contro l performanc e o f a chevron-blad e mis t eliminato r wit ha singl e se t o f blade s agains t tha t o f a uni t wit ha doubl e se t o f overlapping-typ e blade s an d a uni t wit ha singl e se t o f wave-typ e blades . II . Plac e an

d Dat e Consolidate dEngraver s 31 1 Eas t 12t hStree t Pos t Offic e Bo x33669 Charlotte , Nort hCarolin a 2823 3 (704 ) 333-036 5 Marc h3 , 198 7

III . Attendee s Consolidate dEngraver s Ro nSteele , Vic e Presiden t Buz z King , Electroplatin g Superviso r Midwes t Researc hInstitut e Robi nBarke r Randy Strai t

/P. 3

IV . Discussio n W e arrive da t th e plan t a t 9:3 0 a.m . Th e visi t consiste do f a tou r o f th e platin g sho pan d a discussio nabou t th e har dchromiu m platin g operatio nan

dth e feasibilit y

o f conductin g anemissio ntes t o nth e chevron-blad e mis t eliminator . A . Genera l Consolidate dEngraver s ha s fou r plant s 1nth e U.S . Th e Charlotte , Nort hCarolina , plan t 1 s a captiv e sho ptha t manufacture s an drefurbishe s Industria l roll s fo r th e packagin g an dtextil e Industries . Har dchromiu m plat e i s applie da s th e final , finishin g stage . Ther e ar e thre e har d chromiu m platin g operation s a t thi s plant , whic har e referre dt o a s Operation s A , B , an

dC i nth e repor t o nth e Initia l sit e visi t t o thi s plan t conducte do nMa y 2 , 1986 . A ne w ventilatio nsystem

an dchevron-blad e mis t eliminato r wit ha singl e se t o f overlapping-typ e blade s wa s manufacture dan dInstalle d b

y Dual l Industries , Inc. , 1 nJanuar y 198 7 t o contro l chromi c ad demission s fro m th e tw o hardchromiu

m platin g tank s 1 nOperatio nB . Befor e th e new Installation , eac htank wa s vente dt o a separat e mis t eliminato r fo r whic h th e manufacture r an

dag e ar e unknown . Th e tw o chromiu

m platin g tank s ar e operate dfro

m 8 t o 1 0 hour s pe r day , 5 day s pe r week , 5 1 week s pe r year . Th e chromi c ad dconsumptio nfo r th e two tank s average s abou t 6 3 kilogram s (14 0 pounds ) pe r month . B . Proces s Informatio n A diagra m o f th e captur e an

dcontro l syste

m fo r th e two tank s 1 n Operatio nB i s presente di nFigur e 1 . Tan k No . 1 1 s 1.5 2 meter s (m ) (5. 0 fee t [ft] ) long , 0.7 1 m (2. 3 ft ) wide , an

d1.8 3 m

(6. 0 ft ) dee pan

d hold s approximatel y

1,79 0 liter s (i)

(47 3 gallon s [gal] ) o f platin g solution . Tank No . 2 i s 1.8 3 m (6. 0 ft ) long , 0.7 6 m (2. 5 ft ) wide , an

d 1.8 3 m (6. 0 ft ) dee pan

dhold s approximately 2,34 0 i (61 7 gal ) o f platin g solution . Th e chromi c ad dconcentratio no f th e platin g bath s i s 21 0 gram s pe r lite r (2 8 ounce s pe r gallon ) o f platin g solution . Tan k No . 1 contain s tw o wor k station s eac ho f whic hi s equippe dwit h a 3,000-amper e rectifier . Tank No . 2 contain s tw o wor k station s tha t ar e equippe dwit hon e 5,000-amper e rectifier . Typically , on e Industria l rol l 1 s plate dfo r abou t 4 5 minute s i neac htank ; however , tw o Industria l roll s ca nb e plate da t a time 1neac htank . Th e operatin g voltag e an dcurren t fo r eac hrol l typicall y rang e fro

m 1 0 t o 1 5 volt s an

d1,20 0 t o 1,60 0 amperes , respectively . Abou t 12. 7 micrometer s (0. 5 mil ) o f chromiu m plat e 1 s applie dt o eac hroll . C . Emissio nContro l
Bot htank s ar e equippe dwit hdouble-side dlatera l exhaus t hoods . Th e double-side dhoodo nTank No . 1 ha s on e slo t oneac hsid e o f th e tank

<&

### ROOF 

# I I I I I I >^= ^ 

### MOISTUR E

_ n EXTRACTOR^ MIS T

ELIMINATOR 

# 4 - I I

I I I I ROO F

LEGEND : GASFLO

W

TAN

KNO . 1 TAN KNO . 2 Figur e 1

. Diagra m

o f captur e an d contro l syste mfo r tw o har d chromium platin g tank s (Operatio n B ) a t Consolidate d Engravers
.



# cP. 5

tha t 1 s 1.4 5 m

(4.7 5 ft ) lon

g an d8. 9 centimeter s (cm ) (3. 5 Inche s [1n.] ) wide . Th e hoodo nTank No . 2 ha s thre e slot s o neac hsid e o f the tank . Eac hslo t i s 0.4 0 m

(1. 3 ft ) lon

g an d5. 1 c m (2. 0 1n. ) wide . Exhaus t gase s fro

m bot htank s ar e ducte dtogethe r an dvente dt o a chevron-blad e mis t eliminator . Th e mis t eliminato r contain s a singl e se t o f overlapping-typ e blade s an d1 s locate do nth e roo f o f th e platin g sho p (se e Figur e 1) . Accordin g t o vendo r Information , th e actua l ga s flow rat e Int o th e mis t eliminato r i s 17 6 actua l gubl c meter s pe r minut e ( m /m1n ) (6,22 5 actua l cub1c 3 fee t pe r minut e [f t /m1n]) , althoug hth e desig nga s flo w rat e wa s 22 6 m

/mi n(8,00 0 f t /min) . Th e blad e sectio n1 s 1. 1 m (3. 6 ft ) i nheigh t an d widt han

d2 0 c m ( 8 1n. ) i ndepth . Th e actua l ga s strea m velocit y

throug hth e blad e sectio ni s abou t 15 0 meter s pe r minut e (m/m1n ) (49 0 fee t pe r minut e [ft/min]) , whil e th e desig nga s velocit y wa s abou t 19 0 m/m1 n(62 0 ft/min) . A moistur e extracto r 1 s Installe d 1 nth e stac k t o contro l chromiu m emission s tha t ma y

b e draw

nthroug hth e mis t eliminator . Th e mis t eliminato r an

dmoistur e extracto r ar e equippe dwit ha spra y washdown system . Th e washdow

nwate r i s draine dInt o a 340-i . (90-gal ) holdin g tank an dthe nt o th e platin g tank s t o mak e upfo r platin g solutio nevaporatio n. losses . Th e mis t eliminato r an dmoistur e extracto r ar e washe ddow non e o r tw o time s pe r da y

dependin g o nth e amoun t o f platin g solutio nmakeu p needed . D . Conclusion s Consolidate dEngraver s i nCharlotte , Nort hCarolina , 1 s representativ e o f a captiv e sho ptha t perform s har dchromiu m electro platin g o f Industria l rolls . Th e new mis t eliminato r use dt o contro l chromi c ad demission s fro m th e tw o tank s i nOperatio nB i s a goo d candidat e fo r emissio ntestin g fo r th e followin g reasons : (1 ) operatin g parameter s o f th e platin g tank ar e withi nth e range s considere dt o b e typica l fo r har dchromiu m platin g tanks ; (2 ) ther e i s a straigh t sectio n o f duc t a t th e Inle t o f th e mis t eliminato r tha t i s 2. 0 m (6. 7 ft ) i n lengt han

d50. 8 c

m (20. 0 1n. ) i ndiameter , whic hmeet s EPA Referenc e Metho d1 criteria ; however , a stac k extensio nma y nee dt o b e installe d t o allo w fo r prope r locatio no f a tes t por t a t th e outle t o f th e mis t eliminator ; an

d(3 ) emissio ntes t dat a fro m thi s sit e coul db e compare d wit hothe r tes t dat a t o determin e th e effectivenes s o f a mis t eliminato r wit ha singl e versu s a doubl e se t o f overlapping-typ e blade s an dth e effectivenes s o f a singl e se t o f overlapping - versu s wave-typ e blade s fo r controllin g chromi c aci dmist . On e possibl e limitatio no f testin g a t thi s sit e 1 s tha t th e workloa d 1 nth e platin g tank s ma y no t be a s higha s th e workloa ddurin g EPA test s conducte do ntw

o othe r chevron-blad e mis t eliminators . Consolidate d Engraver s personne l wer e very cooperativ e an

dstate dtha t the y

woul d Increas e th e workloa dt o th e exten t possibl e t o accommodat e emissio n testing .



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### V . Reference s 1 . Memo fro

m Strait , R. , MRI , t o Vervaert , A. , EPA/ISB . Septembe r 2 , 1986 . Tri prepor t t o Consolidate dEngravers , Charlotte , Nort h Carolina .



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