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8/18/2019 Kiln Training
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Rotary Kiln
Mechanical Training
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Content:
• Kiln General
• Kiln Inlet Including Seal
• Kiln Outlet Including Seal
• Kiln Shell
• Splined Kiln Tire
• Floating Kiln Tire
• Supporting Roller Station
• Kiln Drives
• Kiln Hood
• Maintenance, Lurication
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POLRO ® 2-support rotary kiln
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Kiln General
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Rotary kiln assembly
! Rotar" #iln shell $ Guard %or rac# and pinion drive
& Kiln inlet 'ith inlet seal 'ith lurication device( Tires 'ith %astening ) Kiln drive
s"ste* + Kiln outlet 'ith outlet seal
Supporting roller stations !- Kiln hood
. Kiln longitudinal guide !! /lin#ering 0one cooling 1optional2
3 Rac# and pinion drive
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!e POLRO 2 - support kiln
• splined tires 1cold gap -452
• sel%6aligning rollers• direct drive via supporting rollers• pneu*aticall" applied inlet and outlet seals• air cooled #iln inlet tra"
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Pro#ess - te#!nologi#al $imensions
%iln &it! pre!eater
%iln &it! #al#iner
1' 12 14 15 1"
L() ratio
3 - *tations
+umber o, stations an$ L ( ) ratio
2 - *tations
1' 12 14 1"
L() ratio
3 - *tations
)esign o, rotary kilns
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3 - support kiln .ersa 2 - support kiln
(6support #iln &6support #iln
Staticall" unde%ined
• possiilit" o%
6 e7tre*e overload
6 plastic de%or*ation
• re8uire*ent %or
6 et7ra sa%et" *argin
6 regular ad9ust*ent
Staticall" de%ined
• constant support loading
• elastic de%or*ation onl"
• no sensitivit" to *isalign*ent
long enough %or process:
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Kiln Inlet
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0Lo&-$ust kiln inlet
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ir #oole$ segmente$ inlet t!roug!
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%iln inlet seal
Seal principle
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• Slot ad9ust*ent et'een support ring
and slide ring
/ardanical %astening
%iln inlet
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Kiln Outlet
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%iln outlet sealing
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Slide ring
Support ring
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=rinciple #iln outlet Kiln outlet 'ith dust chute
%iln outlet
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Outlet o% #iln Outlet cooling
%iln outlet
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%iln outlet
;ir pressure s"ste*
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Kiln Shell
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)es#ription o, t!e kiln s!ell #al#ulation basi#s
The shell is a rotating dru* *ade %ro* rolled steel plates4 These shell sections
have the sa*e inside dia*eter ut di%%erent plate thic#ness4 ;ll sections are
'elded together4
The shell thic#ness is a result o% so*e calculations, the so6called Kiln Static4
>asic %or the #iln static are so*e *echanical rules and so*e li*iting %actors%or the shell *aterial, the so6called Design /riteria4
The design criteria %or a #iln shell is the >ending Stress4
Di%%erent #iln areas have di%%erent Loads4
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un#tions o, t!e kiln s!ell
• /onve"s *aterial
• Guides gas %ro* cooler to #iln
• /reates a constant *oving *aterial ed
allo's heat e7change et'een gasand *aterial
• Holds the ric# lining
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Splined Tires
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)es#ription an$ ,un#tion o, t!e kiln tire
The tire is a steel ring on the outside o% #iln shell4 It 'or#s as an
sti%%ener %or the #iln shell4 The #iln tires have to carr" the #iln 'eight4
Functions? • Trans%er load %ro* shell to the rollers
• Keeps the shell in a round shape
• Ma" trans%er tor8ue %ro* roller to tire
Design criteria? • Tire ending stress
•
Ovalit" in 5
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Distriution o% %orces First splined tire in !+.-
*pline$ tires
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=rinciple splined tire Splined %i7ing
*pline$ tires
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heFloating Shim
Plates Form the
Connection Between
the ire eeth and the
X-Shaped Retaining
Blocks
*pline$ tires
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Kiln shell ovalit"
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*pline$ tire
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Floating Tires
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Distriution o% %orces =rinciple o% %loating tires
loating 8loose9 tires
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Steps %or radial pla" reduction
loating tires
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loating tires
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*pline$ kiln tire loating kiln tire
Comparison o, kiln s!ell o.alities
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Supporting Roller Station
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)es#ription an$ ,un#tion o, a kiln roller
; #iln roller is a steel 'heel 'hich is supported on each side4
@ach tire is supported " t'o rollers4
Functions? • Trans%er load %ro* tires to ase plate
• Supports tires and #eeps the* in position
• /an trans%er tor8ue %ro* rollers to tire
• ;llo's rotation
Design criteria? • Hert0 =ressure
• >earing =ressure
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Roller station
! >ase %ra*e
& >earing housing
asse*l"
( Roller and sha%tasse*l"
. Guide loc#
!& Oil level indicator
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*el, aligning roller station ,or Polro kiln
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Kiln Drives
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irt! gear $ri.e system
! >ridge support
& >ridge plate
(, =late olts
. Girth gear
3 Heat shield
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*el,-aligning pinion
=er*itted tilting? A !- **
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;le#tro-!y$rauli# $ri.e system
;l ! $ li $ i
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;le#tro-!y$rauli# $ri.e system
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;le#tro - me#!ani#al $ri.e
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Kiln Hood
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%iln !oo$
! Lo'er part o% hood
& Bpper part o% hood( Suspension door
Trolle" arrange*ent
. >urner seal
3 Inspection port
$ ;ccess door
) Su plate
+ /ollar seg*ent
!- Seal to cooler
!! Opening %or *easuring
soc#et
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Maintenance
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/hec# points o% #iln inlet seal?
• Slot et'een support ring and slide ring
• Thic#ness o% the 'ear ring
• Cisual chec# o% sealing sur%aces
• /hec# %or *aterial lea#age
• =re6tensioning o% sealing roe
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;ir pressure net?
• ;ir pressure %or pneu*atic6c"linder
• /hec# o% 'ater separator
• /hec# o% luricator o% pressuri0ed air
• /hec# %or lea#ages
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/hec# o% outlet seal?
1si*ilar to inlet seal2, 'ith additional points?
• Graphite lurication o% slide rings
• Function o% pendling hatch
• /learance o% dust chute
• Functioning operation o% e7pansion 9oints
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/hec# o% splined tire %astening?
• /hec# o% 'edge pre6tension
• Cisual chec# o% tire area
• /hec# o% 'elds
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/hec# o% %loating tire %astening?
• /ontrol o% relative *ove*ent
• =la" *easure*ents during stop ti*es
• /ontrol o% a7ial retainers
• Lurication o% slide sur%aces
• /hec# o% 'elds
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Da*ages at ase plates " de%%icient lurication
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