desiccant dryers- types
TRANSCRIPT
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8/10/2019 Desiccant Dryers- Types
1/2
1. HEAT
Moist
desic
(A)[o
enabl
Clean
(B)[o
Towe
atmo
Apor
befor
exits
Once
press
theth
valve
switc
Thest
which
forpu
Dew
shift
rathe
2. HEAT
Moist
desic
dryin
moist
feedt
Towe
depre
(D&G
Apor
exitin
passe
desor
heate
thed
press
2will
willb
Thea
LESSTYPE:
,filteredcom
antfilleddryi
r asetoftw
esthedesicca
,dry
compres
asetoftwo
r2(wheninr
pherethrou
ionofdryco
exiting(B)a
tvalve(D)to
desorbed,val
rized.Attow
reewayvalv
]and
Tower
andTower
andardtowe
is4.5minut
rge is18%.T
ointdemand
vertillthed
thanfollow
EDLOWLOS
,filteredcom
antfilleddryi
enablesthe
ure.Clean,dr
heairsystem
r2(wheninr
ssurizestoat
)openandth
ionofdryco
g(E)andpass
sthroughoff
bthemoistur
rturnsoffan
siccantbedi
rized.Attow
beplacedon
regenerated
proximated
TYP
pressedaire
ngTower1t
ON/OFFval
nttostripth
sedair
exits
t
ON/OFFvalv
egeneration
hmuffler(C)
pressedair
ndpassesthr
desorbthe
ve(D)closes
ershiftover,
s(A&B)tosh
2will
be
plac
willberegen
shiftoverint
s.Theapprox
hiscanbered
cycle,which
wpointdete
heNEMAcyc
STYPE:
pressedaire
ngTower1t
desiccanttos
ycompressed
.
egeneration
mospherethr
eheaterturn
pressedair
esthroughth
lineTower2
efromthede
cooldrypur
cooled.Valv
ershiftover,
line.Operati
.
ryairconsum
ES OF D
tersthepres
roughtheth
es].Upflow
airstreamo
hroughthe
th
s]tofeedth
ode)depres
whenvalve(
purgeair)is
ughoffline
oisturefrom
ndTower2i
valve(E)will
ift[ortheset
don
line.
O
erated.
ervalistheN
imatedryair
ucedby46
ffectivelyde
rioratesbelo
le.
tersthepres
roughtheva
triptheairst
airexitsthro
ode)closes
oughmuffler
on.
purgeair)is
eheater.Hot
ndexitsatv
siccant.Once
geaircontinu
e(D)closesa
valve(B)will
nswillswitch
ptionforpur
SICCAN
surizedonlin
eewayvalve
rying
moisture.
reeway
valv
airsystem.
urizesto
)opens.
iverted
ower2and
thedesiccant
sre
open,causing
ofON/OFF
erationswill
EMAcycle
consumption
byusinga
laysthetowe
asetpoint,
surizedonlin
lve(A).Upflo
eamof
ughvalve(E)
alve(B),then
(C).Valves
ivertedbefo
drypurgeair
lve(D)to
desorbed,th
estopassun
dTower2is
openandTo
andTower1
eis6%.
T DRYE
.
r
w
to
e
e
til
re
er
S
Page1of2
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8/10/2019 Desiccant Dryers- Types
2/2
3. HEAT
Mois
onlin
(A).U
strea
throu
regen
atmo
theh
Theh
throu
throu
desic
valve
Once
Valve
afixe
bepl
close.
regen
There
Note
1
2
3
EDNOLOSS
,filteredco
desiccantfi
pflowdryin
ofmoistur
ghvalve(E)t
erationmod
spherethrou
aterturnso
ighefficienc
ghtheheate
ghvalve(F)
antinTowe
(D).
thedesiccan
s(F&D)clos
dtimeinterv
cedonline
Operations
erated.
isnodryair
:
. Theheatl
recomme
. Theheate
supply.Th
henceisn
. Theheate
heater,in
expensive
TYP
BLOWERPU
pressedair
lleddryingT
enablesthe
.Clean,dry
ofeedtheai
e)closesvalv
ghmuffler(C
n.
blowerdra
r.Theambie
ndflowsdo
2,collecting
tis
fully
deso
eandTower
al,valve(B)
odrytheair
illswitchan
consumptio
ssdesiccant
dedinstallat
dlowlossdr
isdoesnoto
otverypopul
dnolossblo
additiontot
andpurgelo
ES OF D
GETYPE:
ntersthepr
wer1throu
desiccantto
ompressed
rsystem.To
e(B),thend
).Valves(D&
sambienta
tairstream
nwardthro
watervapor
rbed,the
he
2isrepress
illopenand
treamandv
dTower1w
forpurge.
dryerneeds
ionforunma
erneedsco
feranycons
arnow.
erpurgedr
econtrolpo
ssisnotdesi
SICCAN
ssurized
hthevalve
striptheair
irexits
er2(wheni
pressurizes
F)openand
irandfeedsi
asses
ghthemois
beforeexiti
terturns
off
rized.At
Tower2will
alve(A)will
illbe
nlycontrol
nnedlocatio
trolpowera
iderableadv
erneedspo
wer.Thisisa
rable.
T DRYE
n
to
t
g
.
owersuppl
ns
swellasasi
ntageovert
wersupplyf
goodsoluti
S
foroperatio
nglephaseh
heheatlessd
rtheblower
nwhencom
Page
n.Henceitis
aterpower
esiccantdry
motorasw
pressedairis
2of2
the
r,
llas