SHARPLES Nozlejector Type Centrifuges - General Brochure
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Transcript of SHARPLES Nozlejector Type Centrifuges - General Brochure
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SH RPLES
N O Z L J E C T O R
C E N T R I F U G E S
•
L IG H T P H A S E
H E A V Y P H A S E
Unique com bination of features
for high-eff ic - icy proces sing
Nozljector centrifuges— one of se veral varieties of
S harpies disc-type ma chines— provide
c o n t i n u o u s
d ischarge o f so l ids
through specially-designed noz-
zles located around the periphery of the bowl. This
continuous-discharge feature is com bined w ith high
centrifugal force to make possible the effective
separation, classification or concentration of a wide
variety of m aterials, many of w hich cannot be proc-
essed economically by any other means.
SOLIDS Nozljectors are especially valuable for removing
high concentrations of solids, and offer greatest
eff iciency in ha ndling f inely-divided o r am orphous
solids. The nozzles are designed to permit a free flow
of solids through relatively small orifices. This self-
cleaning feature enables long continuous operation
before bowl cleaning is required.
F E E D
Separator bo wl conf igurat ion for suspended-
bowl top-driven Nozl jector models.
F E E D
L IG H T P H A S E
H E A V Y P H A S E
Separator bowl configuration for bottom-
driven Nozljector models. Bowl of given
type (separator, clarifier, etc.) performs in
same b asic manner in a l l models.
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Performance matched
for every application
A
wide choice of N ozljector models, sizes, operating
variat ions an d materials of construction en able in-
dividual process requirements to be closely matched.
T he DH 5 and DH L Nozljectors are suspended-bowl,
top-driven, bottom-fed models that are available in
pressurized as wel l as standard construction. The
DH 5 offers high capacity to over 30,0 00 gallons per
hour, while the DH L is well suited to pi lot plant or
cont inuous comm ercial product ion. The DH 2 and
DH 3 Nozljectors are bottom-driven, top-fed models
that provide intermediate capacities. The DH-1500
is a bottom-driven model designed specifically as a
self-contained high-efficiency pu rifier for o ils.
A ll models except the DH -150 0 P urif ier, which uses
a special oi l purif ication bowl, are available with
SOLIDS bowls special ly designed for separation, clari f ication
or controlled solids concentration. P rocessing begins
at the bottom of each bowl, where the feed liquid is
accelerated to bowl speeds. (In top-fed Nozljectors,
the feed is led to the bottom of the bow l through a
hollow cen ter tube, as illustrated at left.)
In separa tor bow ls ,
which are used for the
s i m 1
taneous separation of two l iquids and a sol id, the
feed l iquid is then led outw ard and u p through a
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Clarifier bowl configuration
for Nozljector centrifuges.
F E E D
4
R E C Y C L E
R e c y c l e C o n c e n t r a t o r b o w l
configuration for Nozljector
centrifuges. (C larifier type
s h o w n . )
A P P R O X .
W E I G H T
( i n c l . mo to r )
8,000 lb.
2,300 lb.
1,900 lb.
500 to 600 lb .
hole in each disc. As this takes place, the three
components of the feed are separated
y the high
A
trifugal force developed by the rotation of the
the same time, the discs apply the stratifi-
cation principle of separation—the narrow spacing
between the discs provides isolated paths for con-
ducting the light-phase liquid to the center of the
bowl and out through the discharge port, and for
conducting the solid particles and heavy- phase
liquid to the outside of the bowl. A small part of the
heavy phase liquid is used to flush the solids through
the nozzles, while the remainder is conducted up-
ward and discharged through a port at the top of
the bowl. As on all Nozljectors, the effluents are
received by suitable covers which keep them sepa-
rate and lead them away.
All Nozljector separator bowls are available incorpo-
rating the patented Sharpies Gravitrol ® system,
which is a built-in feature of the DH-1500 Purifier.
The Gravitrol system automatically maintains the
highest efficiency in clarifying the light-phase liquid.
Solids are thickened into a small amount of the
heavy-phase liquid, part of which is recycled. For
details on this exclusive system, see page 10.
r i f ie r b ow l s
are used
en a single liquid con-
taining solids is to be
processed. The feed is
usually conducted to the
area of the bowl just out-
side the disc stack. (With
certain types of solids,
this may disturb the ac-
cumulation of solids
i n
the nozzle area, in which
Basic speci f icat ions
case the feed can be introduced into the disc stack
as in separator bowls.) As the components are sepa-
rated by centrifugal force, the solids are discharged
through the nozzles, and the clarified liquid is con-
ducted to the center of the bowl and out through
the discharge port at the top.
S h a r p l e s R e c y c le C o n c e n t r a t o r b o w l s
offer a con-
venient, efficient and flexible method of controlling
the concentration of the solids. These bowls are
available in both clarifier and separator types, for
processing two-phase and three-phase feeds. Maxi-
mum centrifuge per-
formance is always
assured because re-
cycling takes place in
an area of the bowl in
which it does not affect
clarifying or separat-
ing efficiency. Control
is effected by recycling
a portion of the dis-
charge from the noz-
zles back through the
bowl to satisfy a part
of the volumetric demand
o f t h e
given size and num
ber of nozzles. This provides a degree of flexibility
practically impossible to achieve by any other means
—solids concentration can be varied for a given con-
stant feed rate; solids concentration can be held
constant regardless of changes in feed concentra-
tion; nozzle size can be varied widely to handle
particles of various sizes and obtain desired solids
concentration.
Specifications for all models are given below, and
individual features described on the following pages.
CENTRIFUGAL
F O R C E
t o 6 ,500 x G
t o 9 ,000 x G
t o 9 ,000 x G
to 14,000 x G
to 9,000 x
G
S P E E D O F
R O T A T I O N
4 , 200 R P M
6,25 0 R P M
6,25 0 R P M
10 ,000 R P M
8 ,0 0 0 R P M
AP P ROX.
O V E R - A L L
DIMENSIONS
57 x 91
x 81 high
32 x 53
(incl. spout)
x 61 high
44 x 45
(incl. spout)
x 5 3 " h i g h
2 5 x
4 1
x
3 9 " h i g h
31 x 44
x 40 high
M A T E R I A L S
O F
CONSTRUCTION
1,250 lb.
- P a c k a g in g — P r o c e s s in g
Bid
uipm n
t
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Available
in all
conventional
corrosion-
resistant
materials
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in open
i t h r e c y c l e
construction
i thout recycle
in low
ith pressure
pressure
ischarge
construction
ith recycle &
(15 psi)
ressure discharge
in high
ith Sharpies
pressure
rav i t rol
® *
construction
ith Gravitrol &
(150 psi)
ressure discharge
D H - 5
Clarifier
D H - 5
Separator
ART
G 1
l r A NI
1 1 \ 1 ( '
No part of the drive need be removed or disassem-
bled. An integral hydraulic lift enables the cover to
be raised so that the bowl and nozzles are acces-
ible. The externally removable nozzle holders are
ved and the bowl simply and easily
leaned by back-flushing through the nozzle ports.
tiLLiiiiiLL,
I
F i t i u t $ L L . -
DH-5 design is the result of long reasearch and
extensive mechanical and process testing at the
Sharples Centrifuge Development Laboratories. The
primary objective was to achieve a simple, heavy-
duty construction that makes possible continuous,
high-capacity, trouble-free performance and low cost
per unit of product. A single, simple seal system is
used in pressurized models to maintain pressure
and protect bearings and other parts from contami-
nation and corrosion. The recycle system is com-
pletely built-in, eliminating the need for external
pumps and piping. These and many additional
features combine to provide a centrifuge of great
reliability and economy of operation.
mon lJL AR CONSTR UC TION
The unique modular design of the DH-5 actually
enables a number of different centrifuges to be
obtained simply by adding or removing interchange-
able parts. 30 standard variations are available, as
shown in the chart below.
*Using partial recycle of discharged heavy phase l iquid
to maintain high
clarifying efficiency automatically. Available
on
separator
models.
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SH RPLES
D H L N O Z L J E C T O R ®
M odular , cont inuous discharge
centr i fuges
Ivinnin
A R
cnnic-rpitrTinm
L ike the D H -5 Noz l jec tor, the D H L combines the
proved design principles of the Nozljector l ine with
newly-developed features to deliver unusually high
performance an d f lexibi l ity. DH L m odels are ideal
for pilot plant service as well as for continuous
commercial production. Sharples modular construc-
tion enables a wide variety of different centrifuges to
be obtained by adding or rem oving interchange-
able
parts.
•
•
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in open
c o n s t r u c t i o n
in low
pressure
construction
(15 psi)
in high
pressure
construction
(150 ps i)
with
r e c y c l e
without recycle
with pressure
d i s c h a r g e
w i t h S h a r p i e s
Gravitrol®*
with Gravitrol
pressure discharge
DHL
Clarifier
DHL
Separator
with recycle &
pressure discharge
irty standard variations, starting with the basic
DHL clarifier or separator, are available, as shown in
e chart below. Each of these variations is available
in a wide variety of corrosion-resistant materials of
L F - BA L A N C I N G B O W L
e DHL also features Sharpies exclusive "Plumb
Bob" bowl suspension. This suspension enables the
owl—which rotates on a vertical axis—to seek its
ly during opera-
ces, such as those caused by
pensated for by this smooth shift in the
owl's axis of rotation. The result is a self-balancing
owl that operates with minimum vibration and
earing wear, and handles higher throughput per
nit of power.
he bowl of the DHL rotates at speeds of up to
10,000 RPM (depending on the material of con-
truction), producing separating forces of up to
14,000 times the force of gravity. These extremely
high forces enable the DHL to process a wide variety
Nozljectors, the nozzles are designed to permit free
flow through relatively small orifices, enabling con-
tinuous operation for long periods before bowl clean-
ing is required.
F A ST, E A SY CLE A NING
An outstanding feature of DHL design is the extreme
ease with which the bowl can be cleaned. No part
of the drive need be removed or disassembled. The
frame top can be removed by loosening just three
bolts, raising the motor and drive assembly with the
convenient integral jack, rotating this assembly and
easily removing the covers so that the bowl and
nozzles are accessible. The externally removable
nozzle cells are then taken out, and the bowl effi-
ciently cleaned by simply back-flushing through
the nozzle ports.
R E LIA BLE , E CO NO M ICA L O P E R A TIO N
Simplicity of design and ruggedness of construction
are the keynotes of the DHL centrifuge. No gears
are used. Only one simple seal system is used in
pressurized models to maintain pressure and
protect bearings and other parts from contamination
and corrosion. The completely integral recycle
system eliminates the need for external pumps and
piping. Vibration is reduced to practically the van-
ishing point, so that no heavy "built-up" foundation
is needed—the only requirement is to support the
weight of the unit. These and many additional
features combine to provide a machine of great
reliability and economy of operation.
The exact capacity of DHL centrifuges, as with
centrifuges in general, depends on many factors
related to the material being processed and the
specific model that is used. The only sure way to
determine capacity for a given application is by a
controlled test under operating conditions. The
Sharpies Centrifuge Customer Service Laboratory
will be glad to perform such tests and to develop
capacity data for your applications.
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High
efficiency performanc e
for a wide variety
o f a p p l ic a t i o n s
The DH-2 Nozljector, providing high separating
forces up to 9,000 x G and capacities to approxi-
mately 6,000 gph, is an excellent choice for
hundreds of applications with intermediate
throughput requirements. Its design and con-
struction features, easy accessibility and simple
operation combine to make it a dependable
process tool that de l ivers long l ife in hard service.
Packaging - P rocessing
ad on
E
i
tit ment
HARPLES
D H-2 NOZLJECTOR®
lApir MA
luTA
u
mur
Sharpies introduced direct drive to el iminate one
of the greatest maintenance problems of in-
dustrial centri fuges . . . the clutch. O n al l 50 - and
60-cycle models there is a direct connection
between the motor shaft and the centrifuge
spindle by m eans of over-sized worm ge ars. (On
25-cycle models, a "V" belt connection is em-
ployed, but no clutch is used.) The spindle em-
ploys a special ly designed cushioned u pper radial
bearing that allows the centrifuge to establish
gyroscopic equilibrium at all times.
n
y
rAI i
y pm ANrrn
No ba lanc ing w eights are used on the bowl of any
S harpies cent r ifuge. P osi tive dynamic balance is
obtained by grinding special ly-bui l t outside shoul-
ders without sacrificing structural strength. In
addition, greater weight at the outside of the
bow l minimizes the effect of any in balances in the
bowl during processing. All parts of the bowl are
keyed so that balance is automatically maintained
every t ime the bow l is re-assem bled.
LONG-LIFE, POSITIVE-SEAL NOZZLE(
Sharpies centrifuges were the first to
use special
boron carbide nozzles. The long service life of
these nozzles is reflected in the fact that nozzle
replacement as a regular maintenance procedure
is today el iminated in m any appl icat ions. U nique
design of the nozzle holders assures positive
sealing without threads, and permits rapid, easy
removal of the nozzles and holders from the bowl.
T he angle of d ischarge f rom the nozz les has been
carefully selected to assure minimum power re-
qui rements and opt imum f low discharge pat tern.
r c
T PACV
tlrF
T he cover assembly of the DH -2 can be disassem-
bled in only a few minutes wi thout using a s ingle
tool. All that is necessary is to loosen the wing-type
cover clamp nuts provided for the cover lid and
upper cover, and the hand-wheel clamps of the
lower cover. Hinged-type clamps minimize the
possibility of misplaced parts. There is no pos-
sibi l i ty of sludge discharge seeping into the base
of the centrifuge—this is prevented by a deep-
channeled cover base with high inside splash
guard, extending up to just below the nozzles.
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SH RPLES
D H-3 HEAVY-D UTY NOZLJECTOR®
highly profi table and a marginal operation. These
are some o f the reasons that the DH -3 N ozl jector
has found wide acceptance for the toughest
jobs in the chemical, food and other industries.
Higher power and capaci ty for the
m ost diff icult jobs
While the DH-3 Nozljector resembles the model
DH-2 in basic design and operation, it provides
the added power, the higher throughput and the
extra duty performance required for the most
severe and difficult applications. In a centrifuge
of the same approximate size as the DH-2, the
DH -3 incorporates a dr ive that can handle process
lo a ds o f u p to 50 H P . L i q u id f lo ws o f u p to 18 ,0 00
gallons per hour can be processed with high
separating forces to 9,000 x G. This extra power
and capacity can make the difference between a
MASSIVE PARALLEL DRIVE
M any of the benef i ts of fered by the DH -3 are the
result o f S harpies P aral le l Dr ive—the rugged spur
gear drive illustrated above. With its inherent
low tooth contact pressure and its simple con-
struction, this drive transmits peak input power
directly to the centrifuge spindle with minimum
wear on the moving par ts—assurance of long l ife
and low-maintenance performance in cont inuous
heavy service.
+ 1 E
Ay
T-UU I Y
cUNSTRUCTION
The
DH - 3
is built throughout to give long life in
hard day-to-day service. I t is ruggedly constructed
in every detail—from the oversized, extra-heavy
stain less steel covers and low-slung b ase, to the
rugged parallel drive, which employs a special
triple bearing assembly for even greater reliabil-
i ty. Heavy-duty construction is also used through-
out the frame and all other parts of the DH-3.
CANITAPY rAcv..-rn_ri PAN nrcirmi
Particular care was taken in the design of the
DH-3 to insure completely sanitary construction
throughout . A l l product surfaces o f both the bowl
and covers, including welds, are highly polished
to prevent liquid or solids holdup. The bowl and
covers of the DH-3 are specially designed for
easy removal and c leaning. Spec ia l emphas is has
been placed on the design of the drive system
and covers to eliminate any possibility of the
product and the lubricating and drive system from
contaminat ing each o ther.
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Si IARPLES
GRAVITROL
®
S Y ST EM * -T H E UL T IM AT E IN A UT OM
Overcom es a l l the l im i ta t ions o f
conven t ional approaches to the
econ om ical pur if icat ion of he avy o i ls ,
and o f fers these ex c lus ive advantages:
M a x i m u m o i l re c o v e ry — N o
loss of oil to the solids
and water phases; all the oil is purified and dis-
charged in the oi l stream.
C o n t i n u o u s l a b o r f r e e
operat ion— P ur i fication o f
even emulsion-bound oils is a routine matter. No
operating personnel needed.
M a x i m u m c la r if ic a t io n — T h e
oil-water interface is
kept outside the disc stack, in the area of highest
centrifugal force. All of the disc stack is used for
purifying the oil.
O i l- f re e s o l id s — N o
sticky, oily sludge. Solids are
washed free of oi l , are easi ly disposable.
S im p l e e x t e r n a l a d j u s t m e n t — Q u i c k
compensation
for changes in the density of the incoming oil. No
changing ring dams or other delays. Highest effi-
ciency assured at a l l t imes.
S e l f - c l e a n i n g — N o
shutdowns for manual removal
of solids. No messy cleaning; oil-free solids are
discharged continuously.
REL I AB L E, S I N G L E- S T AG E PU RI F I C AT I ON OF
E V E N T H E H E A V I ES T , E M U L S IO N - B O U N D O I LS
A troublesome problem in the past has been the
difficulty of breaking oil-water emulsions during
purification. If these emulsions are not completely
broken, a large amount of oil is lost along with the
discharged sludge. At the same time, the oil will
not be adequately purified, and a second stage of
treating will be required for final clarification. In
addition, the sticky, oily sludge poses a disposal
problem.
The Sharpies Gravitrol system effectively solves
every one of these problems, and separates emul-
sions that conventional centrifuges cannot break.
The Gravitrol system automatically controls the
location of the interface, or separating l ine, betw een
the oil and water phases in the centrifuge. The
interface is kept well
outside
the centrifuge's disc
stack, near the walls of the bowl,
w h e r e m a x i m u m
separating force can be applied to the emulsion.
*U.S. Patent 3,047,214
T his also enables the enti re disc stack to be use d o
clarification of the oil, further increasing both puri-
f icat ion ef f iciency and effect ive bowl capacity. As a
result, Gravitrol purifiers deliver oil of the highest
puri ty and oi l -free, eas i ly-disposable s ol ids.
This is accomplished by first sizing the nozzles to
handle a little more water than will ever be intro-
duced in the feed stream. Enough water is then
made available to the recycle stream to satisfy the
constant nozzle demand. Under these conditions,
the centri fuge bowl automatical ly accepts or rejects
the amount of water required to maintain the inter-
face in the desired posi t ion.
The interface can easily be kept in the proper posi
tion even when variations in the specific gravity of
the feed would ordinarily cause it to change. Com
pensation for changes in specif ic gravi ty of as mu ch
as 4 or 5 A P I numbers is easi ly accompl ished from
outside of the centrifuge, without disturbing opera-
tion, by merely changing the temperature of the
recycle water or by adding a chemical such as sal t.
T here is no need to change r ing dams, to make
other internal adjustment or to shut down for
other reason. T his is made possib le by the fact that
most of the recycle water is not in contact with the
oil. T he tempe rature of the recycle water is therefore
pract ical ly unaffected by the temp erature o f the oi l .
StLI- -1,111
1 I AMU hUL
P U R IF I E R O F F E R S G R E A T
CONVENIENCE
Designed specifically
as a high-efficiency
purifier for lube oils,
fuel oils and industrial
oils, the DH-1500
comes complete with
integral feed and dis-
charge pumps and
piping, provides great
convenience and com-
pactness. Fast and
simple installation,
automatic nozzle dis-
charge of solids and
long-wearing construc-
tion combine with the Gravitrol system to m
rel iable oi l puri f icat ion a
c o n t i n u o u s , ro u t in e m a t t e .
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F E E D
PURIFIED OIL OUT
N
W A T E R A N D
NON OILY -
S O L I DS
SEAL
WATER
Sharpies Gravitrol system keeps interface in constant loca-
tion outside disc stack for greater emulsion-breaking ability
and bowl capacity. Discharge is oil-free. Note that actual
separating capacity in centrifugal oil purification is roughly
proportional to the cube of the interface radius. If the radius
is increased from 6 to 9 inches, for example, this 50% in-
crease in distance results in a 338% increase in separating
efficiency This illustrates the great benefit of keeping the
interface as far as possible from the center line of
the centrifuge.
DIR TY OIL FEED
If a conventional separator
bowl is used for oil purifica-
tion, oil and water layers
are hydrostatically bal-
anced. Oil layer is shallow,
sharply reducing bowl
capacity and limiting ability
to break emulsions.
O I L A N D W A T E R
I N T E R F A C E
DIR TY OIL FEED
CL AR IFIED OIL
RE CY CLE S TRE A M WA TE R
NO INTER FACE
NOZZLE
DISCHARGE
O I L , W A T E R
AND SOL IDS
If a clarifier bowl is used for oil
purification, part of the oily
sludge discharge is recycled
through bowl and is continually
bled off in concentrated form.
Much oil is lost, and the oily
sludge poses a disposal
problem.
R E C Y C L E O I L A N D E M U L S I O N
CLARIFIED OIL
S E P A R A T E D W A T E R
z s ,
7
w
f
dA
NOZZLE
D I S C H A R G E
i
k .
`
ir
A T E R
AN D
IL ,
SOL IDS
\\/ ......
FEED HOLES
Completely packaged Sharpies Gravitrol and Water-Wash sys-
tems—such as the skid-mounted system shown here—are
available engineered to individual requirements for maxi-
mum performance, and supplied ready to operate.
U R I F I C A T I O N O F L U B E O I L S F U E L O I L S A N D H E A V Y I N D U S T R I A L O I L S
ED SALTS EFFEC TI VELY REM OVED
nother innovation—the Sharples W ater-W ash S ys-
now provides a practical, efficient way to
t ic washing to offer the ul t imate in
heavy oils. It enables
example, to use low-cost residual oils
saving many thousands of dollars
p
er year. The compact system fits easily into the
'cal diesel engine room, can be installed with
I ngines or added to existing facil i ties.
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Sharples-Stokes Div ision
P E N N W A L T C O R P O R A T I O N
955 M earns Road
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T H E COM P L E T E L IN E OF S H A R P L E S
®
HIGH-PERFORMANCE CENTRIFUG ES
OF A LL TYPES FOR EVERY SEPA RATION AP P LICA TION
SHARPLES SUPER-D-CA NTER ®
C EN T RI FU G ES .. .
for con-
tinuous dewatering of crystalline materials and plastics;
dewa ter ing fibrous and am orphous ma ter ials; sol ids concen -
tration and liquid clarification; wet classification.
SHARPLES NOZLJECTOR
®,
AUTOJECTOR
®
A N D D D A N D
D F C E NTR IF U G E S . . .
for cont inuous sol ids concentrat ion
and liquid clarification; separating immiscible liquids; wet
classification. Solids discharged continuously or intermit-
tently, or manually removed.
SHARPLES SUPER CENTRIFUG ES
®
. . . for solids concen-
trat ion and liquid clarif icat ion; separating immiscible l iquids;
wet classif ication.
SHARP LES CONEJECTOR
®
A N D C A B (C ON S TA N T A N G LE
B OW L ) C EN T RIFU G ES . . .
for continuous dewatering of
crystalline materials and plastics; dewatering fibrous and
amorphous materials.
S H A R P L E S M O D E L C D C O N T IN U O U S D - H Y D R A T O R*
C EN T RI FU G ES .. .
for cont inuous de water ing of crystal l ine
materials and plastics; dewatering fibrous and amorphous
materials.
SHARP LES SUPER D-HYD RATOR ®
CE NTR IF UG E S . . .
for
automatic batch dewatering of crystalline materials and
plastics.
SHARPLES F LETCHER ®
CENTRI F U G ES .. .
for automat ic
batch dewatering of crystalline materials and plastics; de-
water ing f ibrous and am orphous m ater ials; sol ids concen tra-
tion and liquid clarification; wet classification.
CENTRIFUGAL PROCESS SYSTEM ENGINEERING
C omplete, cus tom-des igned process sys tems incorporat ing
cent r ifuges are des igned and suppl ied by S harpies S ystem
Engineering. Integrated engineering of such process systems
assures highest possible ratio of performance to cost. Dis-
cuss your requirements with Sharpies System Engineering
at the ear l iest stage o f planning for maxim um b enef i t .
*Trademark Pennwalt Corpora tion
S O L I D
B O W L
T Y P E
D I S C
T Y P E
T U B U L A R
B O W L
T Y P E
CONTINUOUS
S C R E E N I N G
T Y P E
CONTINUOUS
S C R E E N I N G
PUSHER
T Y P E
C O N S T A N T
S P E E D
HORIZONTAL
B A S K E T
T Y P E
V A R I - S P E E D
V E R T I C A L
B A S K E T
T Y P E