SHARPLES Nozlejector Type Centrifuges - General Brochure

8/15/2019 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.

P a c k a g i n g - P r o c e s s in g

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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

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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.

1 - 8 4 7 - 6 8 3 - 7 7 2 0

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9/12

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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i

ui

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10/12

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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11/12

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

w n r m i n g t p r

Pa

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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-

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SHARPLES Nozlejector Type Centrifuges - General Brochure