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Handbook for Signals and Systems for Second year ECE, EEE, IT, CSE Students of BE/B.Tech Degree - Based on Anna University Tamil Nadu SyllabusFull description
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Handbook for Signals and Systems for Second year ECE, EEE, IT, CSE Students of BE/B.Tech Degree - Based on Anna University Tamil Nadu SyllabusFull description
Full description
Handbook for Signals and Systems for Second year ECE, EEE, IT, CSE Students of BE/B.Tech Degree - Based on Anna University Tamil Nadu SyllabusFull description
Descrição: 2002 US ARMY WEAPON SYSTEMS
NASA System Engineers HANDBOOK
3.1
ra Stea Stea
Inje Inject ctor or
3.2 3.3 3.4 3.5
spirax
Reci culati
MS or Stainles stee feedtank Flas condensing deaerato head Stea injectio system
luable flas stea
atmospheric deaerato system User Benefit
lo
possible
Feedwate
Spra
ystems
When th condensate return rate is high an th cold il be lost th ough he
ib li orthwhil to take fe dwat
an pump it to
nt sp
in circulated pe hour to provid considerable additional flas condensing capacity nl lo powe pump is required.
Chemical dosing cost is kept to minimum. High an steady feedwate temperatur to th boiler Long lif an minima attention. an from blowdown heat recovery
3.1.1
tank base on th metric plat size an indicate th internal dimensions an th tota nomina capacity Th workin leve an contro system chosen Tank Type
Diameter
m' 5kl
k l t a n I S re c a ng u a r I n s ha p
Stea Spir
p ac i 5000
1025/1.75·
M at en al . F ee d t an k a r MS f a b r ic a t e d o r S8
Injectio System St am Injector re av ilable in thre
size to
vigorous mixing of stea an feed wate to driv of th dissolved oxygen conten down to approximatel ppm. scavenging chemicals required Th temperatur of th smooth boiler operation
Feedtank Leve Controls Th design an operatio of wate softenin plan call fo full flowrate an neve trickle. Th flow is therefor nonmallycontrolle by switchin pump or Valv on/off suit is of easons He from boiler lowdow is no so easily co difficul to condense an it is difficul to achiev an even
usin
Spirax leve contro system.
co
sm
Vent Head Th Spirax Stainles stee Vent head is designed to 'Fit an forget'. It will ensure th safe ventin of an excess st entrained condensate Paybac Period of Feedwate Tank very ·C is in fe at temperatur sa
of Fuel-LOa
reduce chemica dosing an increase steaming rate
Fuel savings- Rs 4,40,640 Saving in chemical dosing axim st amin at 0· axim st amin at 90 ce co
Paybac Period oile ,500 kg/h F& 100· Pressure -10. Ba F. W. 7emp-40·C Saving in heatin
3.1.2
year Rs 73,732 year Feed wate 2150 kg/h Feed wate 2350 kg/h it le
spirax St am Inje tors
Stea
Injector
or Bo er Fe a nk , H o w a a n o th e n du st r a l p ro ce s h e a ti n r e qu i re m e n ts .
IN40M
Ho Wa er Ou
V ig or ou s m ix in g o f s te a a n w a e r t ak e s p la c e n s id e t h n oz zl e e ns ur in g quiet operation
C o w a e r d ra w t hr ou g h r ad ia l
3.2.1
Inmany
temperatur
stratification
Boiler feed tank applications
Fitting
End connections 15mm
25mm
40mm
Typica
injector sy tems le ti
ex mple -a ta
li
ro
ti rk
le tr
lo le
te
ti
3.2.2
ts
ic ta
lf
ti
tr
lf-a ti
tr
te
IN15
User Benefits ff rs nd
ra la
elf- ctin
ontr
role
ip
ti
ystems
Literature
le
ic
ro
escribin
t,
maintenanc fa
ff
ic
ti
free operation.
t ur e maintain
efficiency.
individua
applications
Capacity Weight (kg)
r t Injector Tpye
IN15
IN 15 Saturate
~"
1.6
88
stea
it .~i>TaperorNPTmar..
580 66
280
INtS
805
IISP/NPT IemaIe
120
1295
500
t N 25 1 1 t.-
2370
900
Limiti Maximu
16
300
1170
~,
on itions
saturate .0
3065
team co dition g/207°C
Kvvalues KV14 .5
f or m i o ri
is
ri
ti 3.2.3
Esti atin
stea
flow at
fo
at
ea in
ollowi char na le an stim te to made th stea flow at eq ired to he tank in on ho to produc particular temperatur rise in boiler feed tank Fo boiler feed tank note that feed wate flow rate equals stea generation rate plus blowdown rate Injected stea
03
..::;100000
rate Ib/h
20
00 200000
l~yW~v
~SOOOO
30000 iii20CIOO CIOO
7000
-":.~/ '"
!~ 'GI
3000
1000 5000
(I)
~2ooo
~V
1000
3,000 2000
'"
"0
50
30
110000
11000
(I
02
50 Injected stea
rate kg\h
Example Iwan to heat itfrom 20
to 0·
in on hour'.Assu th tank isfun li From th grap th required injected stea rate 155 kg/h. 'M is in faster then th injected stea rate will be thre time as grea i.e. 46 kg/h 'I il il in 20000 000 Ib h. From th grap th required injected stea
rate
00 kg/h
Materials Austenitic stainles stee 316L Systems Fully engineered system ar availabl from Spirax Sarc includin controllers, valves an othe ancillary products.
Spirax Sarc stea
Ho to specif injector type IN25 screwe 1" SS in 316L grad stainles steel.
3.2.4
spirax Automati
Spirax BCS3 vs Manual Blowdown ased your boiler fi in ate, ee wate
Slowdown BCS3
nd
long. st aste
to 500kg' of wate th
yo paid to eat.
Manual Blowdown
im
lo
Time
just blowdown your optimum amount
cons rv fu l, rotect your system an sa es yo money.All thi being don automatically.
3.3.1
utomat
on ro im
lo
I~ A v r ag e
ro Time
Wh
As
Blowdown
TechSpecs
tubes.
rate Boil
upt04000kgihr kg/cm
Pressure
(s stem fo
ir
alread
available.
is neve exceeded How it works -t -f Fr
is
lilA
Scop
of
uppl
firing. Th Controlle r ol l in icated Features: 1) Smar 2)SMPS
en or
tr th
boiler ma ufacturer.
leanin
fe ture
From Boiler
blowdown 9) Separate terminal connections.
3.3.2
ccetcme-s
alv
it
spirax DHIS s im p s im p l
o w c os t s o u t o n o r d ea e a t n g b o e r e ed wa te r a t a tm os ph e
e f e c v e m ea n
o f m ix in g
d ea er at in g c on de ns a
r e u rn ,
as
p re ss u
s te a
M i xe s h o t a n d c o l i nc om i ng f lo w s
Limitin
L ib e ra te s o x yg e a n o th e r g a se s
Max. workin
pressure
S t a in le s s s t e el f o r l on g m a i nt e na n c e f re e l if e
Max. workin
temperatur
ma
wa
Condition 120°C.
Cold Hydraulic test pressure
E as y 10 in s a l M in im iz es w a le r h a m m e Description: S pi r a rs ha l f l s h c o d en si n e ae ra to r a d i s d es ig ne d mi incoming flow of cold make-up, condensate return an flas st am t h b oi l fe t an k h i i xi n a c i o i s c hi ev e by directin th downward flow throug baffle arrangemen within th it is li er te i ss ol v g as e f ro m h e c ol d ke p, ic e nt e t o t m s p e re . h e c ol d a k u p i nl e i s f it t with spra screen whic diffuses th flow increasing it surfac ar t o o m t e t ho ro ug h i xi n it th o nd en s t e a n l as h steam.
three parts: -A
i xi n
nd
u ni t io
ic
i s b ol t
sa
st am
th
op ofth ta
om
ow ow
is ib betwee Th
a n i s s up pl i
ix
th tank an mixing unitflanges.
Spirax immersio
tube is designed to distribute condensate
condensate.
:Tw i mm er si o
t ub e f la ng e
AvaliableTypes: i xi n u ni t i s a va il a l e i n f ou r s iz es : 1 50 , 0 0 2 5 Flange to BS 10tabl '0'. Immersio tube ar availabl in diameter heads lengths of 1200 1800
Engineer iscontacted fo
to suit th
30
B.
deaerato ic i fi c
connection layout shee an to discus
y o u r r e qu i re m e nt s .
S e le c o n T a b Flas
Total Steam Generation
Rate kglh
SiZ9-NB*
Condensing Head Tank Dept
Deaerato
mm(fI.
mm 5000 10000 20000 30000 Availabl
150 200
Hea
Comprises
te
u an ti t
2. 3.
300 on reques
3.4.1
Material
m m e s io n
Gasket
ub
AISI304 Asbestos free Syntheti Fibr
Application
Dimensio ns (mm)
pi s h l l l as h c o d en si n d ea e a t e ad s a r i de a f o il fe ta p pl ic at i n s e y a r s ui t b l f o b ot h e w n d t ro fi t a pp li c t io ns . ac e a i s f it t it c o n ec ti o f o a i ve an ec at e ed wa te r ay z z e . T h ai vent i s f o th immediat ventin of liberate gases.
DHIS
mo return than traditiona
as
it
pass throug shocks.
e nt er s t h th
W he n c om bi n deaerator head.
A i V en t
hole it
2447 350
3008
H o w t o s p ec if y sparge
Example: Deaerato head SS 304, 15 NB Length
Installation
waterhamme foun in sparge pipes. This is achieved by slowing l o of t h c on de ns a e t n , i n p a t ic ul a a n f la s
s te a
i m m er s o n t ub e w it h its l ar g e r c r o s
into th feedtank withou creating sudden i xi n
u ni t t h
fo
NB
60
id mu solution to distributing condensate
NB
f l s h c o d en si n Tighte
al nut-bolt
V ac uu m B re ak e
Lagging away.
3.4.2
uniformly.
ft.
spirax VH
Efficien
separatio rg
fr
genera
Description e n e d s te a
lo
ve
pi es
h e v en t
ea
to s ch a g e d r s t a m a t
wi
velocity safely to atmosphere avoiding th
possibilit of
b u l di ng s T h v en t h ea d n co rp or at e a n i nt er na l b a f l to separate e nt ra in e w a e r f ro m t h steam a n d d i sc h a rg e s it s e p ar a te l t h ro u g h t h d ra i c o nn e ct io n .
Applications
V en t h ea d a r d ea l o r u s o n b lo wd ow n v es se ls , c on de ns a v es se ls , b oi le r f ee ct ta nk s h o w at e s to ra g t an k e tc . W a n in g V en t h ea d m us t n o b e u se d o r s a e t v a v e o u e ts . be
fo lo
life applications
Installation Installation
an
Maintenanc
of
~nre·fl~~:~~a~"!~:~:d~a.r:;eal!!g~~r:nf~~n~~a:I~~ r ot at io n t o p o si ti o t h d ra i c on ne c ti on . T h e d ra i s ho ul d b e p ip e d safe positionwher ther is no possibilit of discharging to e x ce s si ve l h o t w a te r to drain. to ensure We c om me n ha nu pe on t ha t n o d eb r i s r es tr ic ti n t h o ut le t o r d ra i c on ne ct io n
p ir a
fy
ar
t yp e
a n s c e we d c a b o a n n te rn a b af f a n
w it h a u t e i ti c
s te e a ng es . s cr ew e d ra i
s t i nl es s
te
n st r c ti o
e n h ea d s ha l n co rp o a t o ut le t c on ne c i on .
pipe.
Size
nd
ip
on ecti ns
Sp ax Sa ea VH
I n le t s c r e w e d
Drai
in
s c re w e d
v en t h ea d with i n le t f l a ng e d to s ui t B S 4 50 4
