Shini SD-H Series User manual

SD-H Series
Honeycomb Dehumidifiers
Date:Sep. 2014
Version: Ver.D(English)

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Contents
1. General Description.....................................................................................9
1.1 CodingPrinciple....................................................................................10
1.2 Feature..................................................................................................10
1.3 TechnicalSpecifications........................................................................12
1.3.1 Specifications..............................................................................12
1.3.2 Durline Drawing...........................................................................13
1.3.3 DryingCapacity...........................................................................14
1.4 SafetyRegulations................................................................................15
1.4.1 SafetySignsand Labels..............................................................15
1.4.2 Signsand Labels.........................................................................16
1.4.3 Transportation andStorageoftheMachine.................................16
1.4.4 SafetyRegulationsforthe Blowers..............................................17
1.5 ExemptionClause.................................................................................18
2. StructureCharacteristics and WorkingPrinciple....................................19
2.1 WorkingPrinciple..................................................................................19
2.2 RelativeHumidityand Dew-point..........................................................19
2.3 WhyChooseSD-H................................................................................19
2.4 WorkingPrincipleIllustration.................................................................20
2.5 Dew-point Comparison..........................................................................20
2.6 Drawingand PartsList..........................................................................21
2.6.1 StructuralDrawing.......................................................................21
2.6.2 AssemblyDrawing(SD-40H~700H)............................................23
2.6.3 PartsList (SD-40H~700H)...........................................................24
2.6.4 AssemblyDrawing(SD-1000H)...................................................30
2.6.5 PartsList (SD-1000H).................................................................31
2.6.6 AssemblyDrawing(SD-1500H)...................................................32
2.6.7 PartsList (SD-1500H).................................................................33
2.6.8 AssemblyDrawing(SD-3000H)...................................................34
2.6.9 PartsList (SD-3000H).................................................................35
2.6.10 Pipe Heaters..........................................................................36
2.6.11 HeatingCase.........................................................................37

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2.6.12 Honeycomb...........................................................................38
2.6.13 PartsListofHoneycomb(SD-700H/1000H/2000H/3000H)...40
2.7 MainElectricalComponentsDescription...............................................43
2.8 OperationProcedures...........................................................................44
2.8.1 OperationRegulations.................................................................44
2.8.2 Description ofTouchScreen.......................................................45
2.8.3 TouchPanelAppearError...........................................................45
2.8.4 Dew-point Monitor.......................................................................56
2.8.5 Oil Filter.......................................................................................57
3. Installation Testing.....................................................................................59
3.1 Attention................................................................................................59
3.2 Honeycomb-rotor..................................................................................60
3.2.1 WhatisHoneycomb-rotor?..........................................................60
3.2.2 Installation of the Rotor(SD-40H~700H).....................................61
3.2.3 Installation of the Rotor(SD-1000H~4000H)...............................62
3.3 HeaterAssemblies................................................................................63
3.4 EGO......................................................................................................63
3.5 Cyclone Dust Collector..........................................................................64
3.6 Oil Filter.................................................................................................64
3.7 PlateHeatExchanger...........................................................................65
4. Operation.....................................................................................................66
4.1 ControlPanel........................................................................................66
4.2 PanelOperation....................................................................................67
4.3 TemperatureSetup...............................................................................67
4.4 PIDAuto-tuningSetting.........................................................................67
4.5 Intermittent RunningSetup...................................................................67
4.6 WeeklyTimeStartSetup......................................................................68
4.7 PresentTimeModification.....................................................................71
4.8 WeeklyTimeStart.................................................................................71
4.9 Lock SetupWay....................................................................................71
4.10TheSecondlevelofAdvanced Setting.................................................71
4.11WrongCodesRemark...........................................................................73
4.12Installation forDewpoint Monitor...........................................................73

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5. Trouble-shooting........................................................................................77
6. Maintenance and Repair............................................................................79
6.1 Honeycomb...........................................................................................80
6.2 Filter......................................................................................................80
6.3 Cooler...................................................................................................81
6.4 Clean of Ytype strainer.........................................................................82
6.5 MaintenanceSchedule..........................................................................82
6.5.1 GeneralMachineInformation......................................................82
6.5.2 Check AfterInstallation................................................................82
6.5.3 DailyChecking.............................................................................82
6.5.4 WeeklyChecking.........................................................................82
6.5.5 MonthlyChecking........................................................................83
6.5.6 Half-yearlyChecking...................................................................83
6.5.7 YearlyChecking..........................................................................83
6.5.8 3yearChecking...........................................................................83
TableIndex
Table1-1 Specifications.................................................................................12
Table1-2 Specifications.................................................................................14
Table2-1 PartsList (SD-40H~80H)...............................................................24
Table2-2 PartsList (SD-120H~200H)...........................................................26
Table2-3 PartsList (SD-400H~700H)...........................................................28
Table2-4 PartsList (SD-1000H)....................................................................31
Table2-5 PartsList (SD-1500H)....................................................................33
Table2-6 PartsList (SD-3000H)....................................................................35
Table2-7 Optionalheatingcasesparepartslist (SD-200H~700H-PHC).......37
Table2-9 PartsList (SD-700H)......................................................................40
Table2-10 PartsList(SD-1000H/2000H)......................................................40
Table2-11 PartsList(SD-1500H)..................................................................41
Table2-12 PartsList(SD-3000H)..................................................................42
Table2-13 TouchPanelInformation..............................................................45
Table2-14 Adjustment of Proportion (P)........................................................50
Table2-15 Adjustment of IntegralTime(I).....................................................50

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Table2-16 Adjustment of DifferentialTime(D)..............................................51
Table2-17 SystemAlarmInformationList.....................................................53
Table4-1 ControlPanelTable.......................................................................66
Table4-2 WrongCodesRemark....................................................................73
PictureIndex
Picture1-1 Durline Drawing...........................................................................13
Picture1-2 SafetySignsand Labels..............................................................15
Picture1-3 SafetyRegulationsfortheBlowers..............................................18
Picture2-1 WorkingPrincipleIllustration........................................................20
Picture2-2 Dew-point Comparison................................................................20
Picture2-3 StructuralDrawing(SD-40H~700H).............................................21
Picture2-4 StructuralDrawing(SD-1000H~4000H).......................................22
Picture2-5 AssemblyDrawing(SD-40H~700H)............................................23
Picture2-6 AssemblyDrawing(SD-1000H)...................................................30
Picture2-7 AssemblyDrawing(SD-1500H)...................................................32
Picture2-8 AssemblyDrawing(SD-3000H)...................................................34
Picture2-9 Pipe Heaters................................................................................36
Picture2-10 HeatingCase.............................................................................37
Picture2-11 HoneycombPartsDrawing(SD-700H/1000H/2000H)...............38
Picture2-12 HoneycombPartsDrawing(SD-1500H).....................................39
Picture2-13 HoneycombPartsDrawing(SD-3000H)....................................39
Picture2-14 OverloadRelay..........................................................................43
Picture2-15 OperationRegulations...............................................................44
Picture2-16 Description of TouchScreen......................................................45
Picture2-17 Screen OperationFlowTable....................................................46
Picture2-18 SystemDefaultSystem..............................................................46
Picture2-19 DryingProcess Screen..............................................................47
Picture2-20 TemperatureParametersSetting1............................................48
Picture2-21 TemperatureParametersSetting2............................................49
Picture2-22 Processtemp.ParametersSetting1.........................................49
Picture2-23 Processtemp.ParametersSetting2.........................................50
Picture2-24 TimeSetting...............................................................................51

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Picture2-25 TimeSetting2............................................................................52
Picture2-26 AlarmFault Records..................................................................52
Picture2-27 HelpMenu.................................................................................53
Picture2-28 HelpMenu.................................................................................55
Picture2-29 Embedded Dew-point Monitor...................................................56
Picture2-30 PortableDew-point Monitor.......................................................56
Picture2-31 Oil Filter.....................................................................................57
Picture3-1 HoneycombRotor........................................................................60
Picture3-2 InstallationoftheRotor(SD-40H~700H).....................................61
Picture3-3 InstallationoftheRotor(SD-1000H~4000H)...............................62
Picture3-4 HeaterAssemblies.......................................................................63
Picture3-5 EGO.............................................................................................63
Picture3-6 InstallationDiagramof Cyclone Dust Collector............................64
Picture3-7 InstallationDiagramof Oil Filter...................................................64
Picture3-8 PlateHeat ExchangeroverFigure...............................................65
Picture4-1 ControlPanel...............................................................................66
Picture4-2 Intermittent runningsetup1.........................................................67
Picture4-3 Intermittent runningsetup2.........................................................68
Picture4-4 Intermittent runningsetup3.........................................................68
Picture4-5 WeeklyTimeStartSetup 1..........................................................69
Picture4-6 WeeklyTimeStartSetup 2..........................................................69
Picture4-7 WeeklyTimeStartSetup 3..........................................................69
Picture4-8 WeeklyTimeStartSetup 4..........................................................70
Picture4-9 WeeklyTimeStartSetup 5..........................................................70
Picture4-10 HoleSite....................................................................................73
Picture4-11 PartsofDew-point Monitor........................................................74
Picture4-12 CopperJoint Assemblyof OriginalMachine..............................74
Picture4-13 Installation Seat.........................................................................74
Picture4-14 Installation forTransmitter.........................................................75
Picture4-15 Connection of SignalWire.........................................................75
Picture4-16 Installation forDew-point Monitor..............................................75
Picture4-17 Connection of Dew-point Monitor...............................................76
Picture6-1 Filter.............................................................................................81

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1. General Description
Pleasereadthroughthisoperation manualbeforeusingthemachine to
prevent damagesofthemachineorpersonalinjuries.
SD-H serieshoneycombdehumidifiersaremainlyusedtodryhygroscopic
engineeringplastics.A honeycomb-rotorisused tooffereffectivedrying, which
underidealconditions,can supplydehumidified dryair withadew-point lower
than-40 .Thisseriescomprises13 modelsofhoneycombdehumidifiers, the
largest ofwhichcan provide dryair up toaquantityof4,000m3/hr.
Model: SD-40H-D

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1.1CodingPrinciple
1.2Feature
1)Standardconfiguration
●AdoptsP.I.D.temperaturecontrollertoaccuratelycontrolregenerative
temperature.
●Thedehumidifyingsystemof theSD-H seriesfeaturestwocoolerstoensure
alowreturnair temperatureandlowdew-point.
●Returnair filterismounted inside toensurenocontaminationtothe
honeycomb.
●It isbettertoadoptmolecularsievestructurehoneycombthansilicagel
adsorption oneindehumidifying.
2)Accessoryoption
●Centralized automaticcontrolcan be realized byoptionallyselected PLC
touchscreencontroller.
●Optionallyselectdew-pointmonitortorealizedew-pointreal-timemonitoring.
●Optionallyselect dryingheateranditstemp. controllertoworkwithdrying
hopperformaterialdehumidifyingand drying.
●Optionalheat-resistantair pipe,cyclone dust separatorwithfloorstand,oil
filterareavailable.
●Dew-point -50 isoptionallyequipped.

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All serviceworkshouldbecarriedoutbyapersonwithtechnicaltrainingor
correspondingprofessionalexperience.Themanualcontainsinstructionsforboth
handlingand servicing.Chapter6,whichcontainsserviceinstructionsintended for
serviceengineers. Otherchapterscontaininstructionsforthedailyoperator.
Anymodificationsofthemachinemustbe approved bySHINI inordertoavoid
personalinjuryand damagetomachine.Weshall not beliableforanydamage
causedbyunauthorized changeof themachine.
Ourcompanyprovidesexcellent after-salesservice. Shouldyou haveanyproblem
duringusingthemachine,pleasecontactthecompanyorthelocalvendor.
HeadquarterandTaipeifactory
Tel:[phone]
ShiniPlastics Technologies(Dongguan), Inc
Tel:[phone]
ShiniPlastics TechnologiesIndiaPvt.Ltd.
Tel:[phone]

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1.3Technical Specifications
1.3.1Specifications
Table1-1 Specifications
ModelSD- 40H 80H 120H 200H 400H 700H 1000H 1500H 2000H 3000H 4000H
Regen.Heater(kW) 4 3 3 4 7.2 10 15 28 28 32 56
Regen.Blower
(kW，50 /60Hz) 0.2/ 0.3
0.2/
0.3 0.2/ 0.3 0.4/ 0.5 0.75/ 0.9 1.5/ 1.8 2.4/ 3 5.5/ 6.3 5.5/ 6.3 9/ 11 5.5 2/ 6.3 2
Process Heater*
(kW) 4 6 6 12 18 24 32 58 80 96 128
Process Blower
(kW，50 /60Hz) 0.12/ 0.12
0.75/
0.9 0.75/ 0.9 1.5/ 1.8 3.75/ 4.5 5.5/ 6.3 9/ 11
92/
11 2
13 2/
15 2
13 3/
15 3
13 4/
15 4
DryAirCapacity
(m3/hr，50/ 60Hz) 40 /45
80 /95
120 /
130 200 / 220 400 / 450 700 / 780 1000/ 1150
1500/
1750
2000/
2300
3000/
3400
4000/
4500
PipeDia.(inch) 2 2 2 2.5 3 4 5 6 8 8 12
CoolingWater
Quantity(L/min) 5 10 15 30 50 80 120 180 240 360 480
Dimensions
H(mm) 1260 1360 1360 1560 1745 1935 2145 2060 2060 2240 2060
W(mm) 510 530 530 660 700 900 1300 1410 1410 2035 2750
D(mm) 860 820 820 1050 1255 1380 1550 2150 2150 2160 2250
Weight(kg) 145 170 170 265 330 480 700 1010 1300 1600 2200
Note 1) "*"Standsfor dryingheateris optionalequipmentWereservethe right tochange
for working with"European type" hoppers.specificationswithoutprior notice.
2) If equipped withdrying heater and temp.controller,
the modelcode should be followed by"PHC"
(For example: SD-XXH-PHC).
3) For dew-pointmonitor installon the machine,
add "D"atmodel behind.
4) Power 3Ф,230 / 400/ 460/ 575VAC, 50 / 60Hz.

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1.3.2Durline Drawing
SD-40H~700HSD-1000H~2000HSD-3000H~4000H
Picture1-1 Durline Drawing

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1.3.3DryingCapacity
Table1-2 Specifications
Drying capacity(kg/hr)
Material
Drying
temp.
(℃)
Time
(hr)
Specific
Heat
(J/kg.℃)
Material
Specific
Gravity
(kg/dm3)
Moisture
Content
Before
Drying
(%)
Moisture
Content
After
Drying
(%)
SD-
40H 80H 120H 200H 400H 700H 1000H 1500H 2000H 3000H 4000H
ABS 80 2-3 0.34 0.6 0.3 0.02 16 27 35 105 210 355 425 710 1065 1500 1600
CA 75 2-3 0.5 0.5 1 0.02 12 22 30 90 180 295 355 590 885 1200 1330
CAB 75 2-3 0.5 0.5 0.8 0.02 12 22 30 90 180 295 355 590 885 1200 1330
CP 75 2-3 0.6 0.6 1 0.02 16 27 35 106 210 355 425 710 1060 1500 1600
LCP 150 4 0.6 0.6 0.04 0.02 11 20 27 80 160 265 320 530 800 1150 1200
POM 100 2 0.35 0.6 0.2 0.02 24 40 53 160 320 530 640 1060 1600 1800 2400
PMMA 80 3 0.35 0.65 0.5 0.02 17 29 38 115 230 383 460 767 1150 1530 1730
IONOMER 90 3-4 0.55 0.5 0.1 0.04 10 17 22 66 133 220 265 442 663 750 1000
PA
6/6.6/6.10
75 4-6 0.4 0.65 1 0.05 9 14 19 58 115 192 230 383 575 960 1040
PA11 75 4-5 0.58 0.65 1 0.05 10 17 23 69 138 230 275 460 690 780 1150
PA12 75 4-5 0.28 0.65 1 0.05 10 17 23 69 138 230 275 460 690 780 1150
PC 120 2-3 0.28 0.7 0.3 0.01 19 31 41 124 250 413 495 826 1238 1400 1860
PU 90 2-3 0.45 0.65 0.3 0.02 17 29 38 115 230 383 460 767 1150 1530 2080
PBT 130 3-4 0.3-0.5 0.7 0.2 0.02 13 23 31 93 186 310 372 620 930 1100 1600
PE 90 1 0.55 0.6 0.01 ＜0.01 47 80 106 318 637 1062 1275 2125 3185 3600 4800
PEI 150 3-4 0.6 0.6 0.25 0.02 11 20 27 80 160 265 320 530 800 1030 1370
PET 160 4-6 0.3-0.5 0.85 0.2 0.02 11 19 25 75 150 250 300 500 750 1150 1360
PETG 70 3-4 0.6 0.6 0.5 0.02 11 20 27 80 160 265 320 530 800 1030 1370
PEN 170 5 0.85 0.85 0.1 0.05 13 23 30 90 180 300 360 600 900 1150 1360
PES 150 4 0.7 0.7 0.8 0.02 13 23 30 90 180 300 360 600 900 1050 1400
PMMA 80 3 0.65 0.65 0.5 0.02 17 29 28 115 230 385 460 765 1150 1530 1730
PPO 110 1-2 0.4 0.5 0.1 0.04 19 33 44 133 265 440 530 885 1330 1730 2660
PPS 150 3-4 0.6 0.6 0.1 0.02 11 20 27 80 160 265 320 530 800 1030 1370
PI 120 2 0.27 0.6 0.4 0.02 24 40 53 160 320 530 640 1060 1600 1800 2400
PP 90 1 0.46 0.5 0.1 0.02 39 66 88 265 530 885 1060 1770 2655 3500 4000
PS(GP) 80 1 0.28 0.5 0.1 0.02 39 66 88 265 531 885 1062 1770 2655 3500 4000
PSU 120 3-4 0.31 0.65 0.3 0.02 12 22 29 85 173 290 345 575 865 1300 1485
PVC 70 1-2 0.2 0.5 0.1 0.02 19 33 44 135 265 442 530 885 1330 1730 2660
SAN(AS) 80 1-2 0.32 0.5 0.1 0.05 19 33 44 135 265 442 530 885 1330 1730 2660
TPE 110 3 0.7 0.7 0.1 0.02 18 30 40 125 250 413 495 826 1238 1650 1860
Notes:1) Useseparated dryinghopper.
2) Moisturecontentlower than 0.005%after dryingwhen in 20℃
ambient temperatureand65% relativehumidity.
3) Specificmodelselection, pleaseconsult thelettereasyservice personnel.

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1.4SafetyRegulations
Note!
Electricalinstallation of the machineshouldbedone byqualified
electricians.
Beforeconnectthroughpowersupply, makesurethat powerswitch
specificationsand securityratingsaresuitableandreliable, and alsothemain
switchisturned toOFF. Turnoff mainswitchandauto-start switchbefore
serviceand maintenance.
1.4.1SafetySignsand Labels
Danger!
Highvoltagedanger!
Thislabelisstuck onthe electricalboxes.
Attention!
Thislabelmeansthatthisarea shouldbetaken care!
Warning!
Hightemperature, takecareof hands!
Thislabelshouldbestick tothe shell of heater.
Attention!
Noneed forregularinspectionbecauseall theelectricalpartsinthe
controlunit arefixed tightly!
Picture1-2 SafetySignsand Labels

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1.4.2Signsand Labels
Waterinlet: inletforreplenishingwater
and coolingwater.
Wateroutlet: drainageoutlet.
1.4.3Transportation andStorageoftheMachine
Transportation
1)SD-H serieshoneycombdehumidifiersarepacked incratesorplywood
caseswithwooden pallet atthebottom, suitableforquick positioning byfork
lift.
2)Afterunpacked, castorsequippedonthe machinecan be usedforeaseof
movement.
3)Donot rotatethemachineandavoidcollision withotherobjectsduring
transportation toprevent improperfunctioning.
4)Thestructureofthe machine iswell-balanced,althoughit shouldalsobe
handled withcarewhenliftingthemachine forfearoffallingdown.
5)Themachine anditsattached partscanbekeptat atemperaturefrom-25
to+55forlongdistancetransportationand forashort distance, it can be
transported withtemperatureunder+70 .
Storage
1)SD-H serieshoneycombdehumidifiersshouldbestoredindoorswith
temperaturekeptfrom5to40andhumiditybelow80%.
2)Disconnect all powersupplyand turnoffmainswitchand controlswitch.
3)Keepthe wholemachine,especiallythe electricalcomponentsawayfrom
watertoavoidpotentialtroublescaused bythe water.
4)Plasticfilm shouldbeusedtoprotect the machinefromdust and rains.
Workingenvironment
Indoorsinadryenvironment withmax. temperature+45 and humidityno
morethan80%.
Donotusethemachine
1)Ifit iswithadamaged cord.
2)Onawet floororwhen it isexposed toraintoavoidelectricalshock.
3)Ifithasbeendropped ordamaged until it ischeckedorfixed byaqualified
serviceman.

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4)Thisequipmentworks normallyinthe environmentwithaltitudewithin3000m.
5)At leastaclearanceof1msurroundingthe equipment isrequired during
operation.Keepthisequipment awayfromflammablesourcesat least two
meters.
6)Avoidvibration,magneticdisturbanceat theoperationarea.
Rejectedpartsdisposal
When the equipmenthasrun out itslifetimeand can notbe usedanymore,
unplugthepowersupplyand disposeof it properlyaccordingtolocalcode.
Firehazard
Incaseoffire, CO2drypowderfireextinguishershouldbe applied.
1.4.4SafetyRegulationsforthe Blowers
1)Undernormaloperation, the blowerswill generatehightemperature. Donot
touchblower's casetoavoidanyphysicalinjury.
2)Undernormaloperation, the blowermotor's current loadingwill increaseor
reduceaccordingtoairpressure's changeaccordingly.Whileinstallation,an
adequatemotoroverload protectionswitchshouldbe installedwithfull
loadingtest, toensureoperatingsafelyunderfull-loadingtoavoidmotor's
damage.
3)Toavoidanyblock materials, dust, powder, fiberparticlesandwaterdrops
enteringtheblower, and hencecausethedeficiencyof itsperformance.This
machine iswell designed withair filters,sopleasecleanupthefilterwithany
foreignparticles(recommendedtoclean up thisfilterweekly).
4)Clean the blowersbothinternalandexternalparts(especiallyforthe fan
coolingpath),andremovesurfacedust if necessary. Ifmoredustsare
accumulated, itwill causedeficiencyforventilation,temperaturerising,
vacuumpowerreduced, vibration increasedand soit will causemachine
brokedown.
5)Ball bearing, oil sealandsoundproof arebelongingtoconsumablepartsand
soit hasalifeperiod and requiresregularreplacement.Meanwhile,blade,
externalcase,andmetallicscreen etc. shouldbe replacedregularlyforbest
performance.
6)Undernormaloperation,iftheblowersarenotrunningsmoothlyorabnormal
noiseappeared. Pleaseimmediatelyshutdownthe machineforrepair.

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Picture1-3 SafetyRegulationsfortheBlowers
1.5Exemption Clause
Thefollowingstatementsclarifytheresponsibilitiesandregulationsbornbyany
buyeroruserwho purchasesproductsandaccessoriesfromShini(including
employeesandagents).
Shiniisexempted fromliabilityforanycosts,fees,claimsandlossescausedby
reasonsbelow:
1. Anycarelessorman-madeinstallations,operation andmaintenancesupon
machineswithoutreferringtothe Manualpriortomachineusing.
2. Anyincidentsbeyondhumanreasonablecontrols, whichincludeman-made
viciousordeliberatedamagesorabnormalpower,and machine faultscaused
byirresistiblenaturaldisastersincludingfire,flood,stormand earthquake.
3. Anyoperationalactionsthatarenotauthorized byShiniuponmachine,
includingaddingorreplacingaccessories, dismantling,deliveringorrepairing.
4. Employingconsumablesoroil mediathatarenotappointed byShini.

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2. Structure Characteristics andWorkingPrinciple
2.1WorkingPrinciple
Themoisturecontainedinthe air whichiswaited fortreating)will be absorbed
byhygroscopicmaterials,hereafter,be de-absorbedbythe regenerated hotair.
And the twoairstreamworktogetherintherotation wheel.So,withthe rotation
ofthewheel,moisturewill be absorbedandde-absorbed continuously, and
drainout viade-absorbingbyregenerated air toformasteadylowdewpoint
airstreamforusing.
2.2RelativeHumidityandDew-point
Relativehumidity: Relativeair humiditymeansrealvaporcontent tosaturated
vaporat thesametemperatureinpercentage.
Dewpoint: itmeansthat temperaturewhen the saturationvaporbeginstodew.
When the relativehumidityis100%, the ambient temperatureisthe dewpoint
temperature.The morelowerofdewpointtemperature(thantheambient
temperature)is, the moreless possibletodew, that alsomeansthemoredrier
the air is.The dewpointwill notbe influencedbytemperature,butinfluenced by
pressure.
2.3WhyChooseSD-H
Themainreasonforthedefectsofplasticproducts,suchasbubbles,silverlines,
flaws, poortransparency, etc. isthat plasticrawmaterialsarenot completely
dried beforemoulding.Hygroscopicplastics, suchasPA,PC, PBT, PET,
NYLONand soon,cannotbe thoroughlydried throughtraditionalmethods.It is
proved that heated anddehumidifiedair withlowdew-point downto-40 can
makemoisturecontentofsuchmaterialsoverthan0.02%beforemoulding.
SD-H honeycombdehumidifiers,utilizinghoneycomb-rotorinafull-closed
systemtodehumidifyprocess air, canmeet suchrequirements. Hotair withlow
dew-point producedbythisunit isquicklyand continuouslyblowed toplastic
particlestocompletelyabsorbthemoisture,thustogainagooddryingand
dehumidifyingeffect.

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2.4WorkingPrincipleIllustration
Drying Blower
Cooler
Cooler
Process Filter
Regen.Heater
Regen.Filter
Regen. Blower
Everyworkingareaofhoneycombrotor
1)Dehumidifying zone
2)Regenerativezone
3)Cooling zone
HopperDryer
ElectricalHeat
forDrying
Honeycomb
Rotor
Picture2-1 WorkingPrincipleIllustration
2.5Dew-point Comparison
Picture2-2 Dew-point Comparison