Boiler Coal Feeder 2.0 Applicable Scope and Quoted Materials: This chapter is applicable for EG 2490 weighing type coal feeder (produced by Shenyang Shi DaoKe Electric ower E!uip"ent #o$% &td$' "aintenance and oerhaul and to offer references and guides for the "aintenance personnel$ )uoted "aterials* EG 2490 +eighing Type #oal ,eeder Storage% -nstallation% .aintenance and opration (#o"bined boo/' Shenyang Shi DaoKe Electric ower E!uip"ent #o$% &td 2.1 Equipment Brief ntroduction and !arameter 2.1.1 Coal Feeder Brief ntroduction Si (1' electronic weighing type coal feeders produced by Shenyang Shi DaoKe Electric ower E!uip"ent #o"pany li"ited are e!uipped for e ach boiler% which "ainly consists of coal feeder body% belt% drie deice% cleaning transportation chain% drie and trans"ission deice% coal feeder electronic control deice and .icroprocessor control deice$ During wor/% raw coal drops fro" raw coal hopper to transportation belt of coal feeder% which transports raw coal to inlet pipe of chute under bringing of trans"ission deice$ 3egulate tension degree of belt through tightening shaft and regulate coal feeding a"ount through running speed of belt$ 2.1.2 !arameter" Capacit# 2$$2$ E!uip"ent na"e* electronic weighing coal feeder Type* Type* electronic weighing type .odel* EG2490 type% output regulable range* ～0t5h 6elt speed when "ai"u" output* 0$21 "5s )uantity* Si (1' coal feeders are e!uipped for each boiler% 2 sets installed for this pro7ect$ #oal feeder belt width* 840 "" ,eeding coal distance (coal feeder inlet outlet centerline distance'* 2:00 "" (interi"' ;o"inal height with interface of raw coal bun/er outlet* 20$:" (interi"' ;o"inal height with interface of coal "ill inlet* 0$:0" (interi"' -nterface di"ension of raw coal bun/er outlet* ∅940<0 (interi"' -nterface di"ension of "ill inlet*
#oal outlet flange inner dia"eter (outlet coal ale inner dia"eter'*= ∅929=""% "aterial* ) 2>:? 2$$ 2$$2$ 2$2 2 -nte -nterf rfac ace e di"e di"ens nsio ion n with with "ill "ill** oute outerr dia" dia"et eter er ∅@20 (fina (finall di"e di"ens nsio ion n of inst instit itut ute e is preailed'""% wall thic/ness =0="" 2$$2$> .ain drie "otor Type* A>4 ower* >/+ ower supply* >80B% three phases :0C ,ull load start tor!ue* >2;"
2$$2$4 .otor of cleaning chain .odel* A0$>@4 ower* 0$>@/+ ower supply* >80B% three phases :0C 2$$2$: .otor sealing air Sealing air pressure (outlet differential pressure with "ill'* :00a Sealing air a"ount* 0;">5"in 2$$2$1 6loc/ ecluding air* 6loc/ ecluding air pressure* 0$:.a 6loc/ ecluding air a"ount* 0$2;">5"in 2$$2$@ 3e!uired "ini"u" coal colu"n height of sealing* $: " 2$$2$8 #oal gate ale purging air (if there is'* urging air pressure* 0$:.a urging air a"ount* 0$2;" >5"in 2$$2$9 ,ire fighting stea" para"eter* ressure* 0$4 .a Te"perature* F2:0℃ #oal feeder feeder body weight* 4000 /g -nlet coal gate ale weight* 000 /g utlet coal gate ale* 800 /g -nlet chute and other accessories weight* >0 /g utlet chute and other accessories weight* 400 /g #oal feeder "ai"u" "ai"u" weight when charged with coal* 8:00 /g 2$$2$0 3aw coal pile specific graity* 0$9>8 t5" > (design coal' 0$849 t5"> (chec/ed coal' 2$$> 6asic perfor"ance &ife of coal feeder should be no less than >0 years$ #oal feeder can supply coal continuously and eenly% weighing weighing is right and reliable% regulate coal feeder output !uic/ly and rightly according to boiler co"bustion control syste" to "a/e actual coal feeding a"ount "atch with boiler load$ #oal feeder can start with full load$ #oal feeder "easuring precision* H0$2:I 。 #oal feeder control precision* HI 。 3unning with no fault* :000h ?ntieplosion of coal feeder feeder is designed as per 0$>:.pa$ #oal feeder has capacity "easuring function% when electronic weighing syste" is in fault% it can be conerted to olu"e "easuring type and send alar" signal$ During nor"al operation of coal feeder% noise at place " away fro" shell should not eceed 8:d6 (?'$ 2.1.& Structure and S#stem Confi'uration #oal feeder shell% inlet outlet flashboard ale% inlet outlet chute and re gulable connector are pressure resistant design with pressure resistant degree of 0$>:.pa$ Ensure sealing perfor"ance fine and no powder lea/age$ Sealing air is een and regulable% aoid upward return of hot air powder in "ill effectiely and blowing coal on belt away$ +atch window is set in coal feeder shell an d eplosionproof spot light are set in coal feeder shell for watching operation condition inside shell$ #o"pressed air noles are installed on watch window for cleaning dust fro" inner surface% thus it is not necessary to open ale or stop coal feeder$ 2.1.( Coal )ransportation Mac*ine
.ain drie roller has function of a ntisliding and antideflection$ Drien roller has selfcleaning function$ 3ubber belt tensioning deice is set for coal feeder to /eep constant tension of rubber belt and ensure stable "easuring precision$ Tensioning Tensioning deice should be conenient for regulation$ .easures should be ta/en to aoid rubber belt deflection$ #oal feeders are e!uipped with functions of superision and alar"ing of brea/ing coal% bloc/ing coal and insufficient coal$ #leaning deice is set at lower section of coal feeder$ -nlet and outlet chute of coal feeder should ensure no coal bloc/ing and wall thic/ness should be no less than 0""% "aterials of all "etal parts contacting with coal flow adopts stainless steel$ -nlet and outlet coal gate ales are able to open or close "anually or auto"atically% its action should be agile and reliable% ale position indication is set$ During coal bloc/% coal feeder can turn in reersal to unload coal and necessary e"ergent coal discharging deice is also set$ #oal feeder is e!uipped with sealin g air interface and fire fighting interface$ Bale Bale conenient for "aintenance id set for coal feeder% "easuring transportation part can be dis"antled with special tools and can be drawn out wholly fro" shell for the conenience of "aintenance$ #oal feeder weighing "easuring deice consists of wei ghing type transducer% weighing roller and "easuring roller$ +eighing type transducer is antidust and antieplosion type and can wor/ nor"ally in abo"inable eniron"ent$ #oal feeder rubber belt is fire resistant% high intension% continuous type rubber belt% ring has no tiein and its per"anent etension rate is less than ％% wae baffle with s/irt at two sides can preent coal powder fro" lea/ing out fro" belt$ -nside and outside cleaning deices are set for coal feeder to re"oe coal powder used on rubber belt surface$ #leaning deice scraper "aterial should not da"age rubber belt$ Scraper chain cleaning "achine is set for coal feeder and installed on shell bedplate under rubber belt for cleaning coal re"oed fro" rubber belt and coal dropped during running% all of which "a/es shell botto" free fro" accu"ulated coal$ ?ir sealing of inlet and outlet "otordrien coal gate ale of coal feeder is fine and water discharging interfaces are set$ .aterials of all "etal parts contacting with coal flow adopts stainless steel% structure design of coal gate ale "eets the re!uire"ents of ;,? and can bear 0$>:.a eplosion pressure$ .otordrien coal gate ale has selfcleaning function% and could not be bloc/ed by coal particles after repeat operationJ it can be closed or opened easily by "anual$ -nlet coal gate ale inner dia"eter should not be less than 900"" and outlet coal gate ale inner dia"eter should be no less than 100""$ 2.1.+ Motor Drie deice speed regulation control "ode* fre!uency conersion speed regulation (transducer inlet' .otor oltage* >80B .otor protection grade is* -:4 。 .otor has proper position for connecting fied earth lead$ .otor outlet bo direction% position* fro" "otor to coal feeder% outlet bo is at left side$ .ai"u" noise at place $:" away fro" "otor shell and $2" fro" operation platfor" should not eceed 8:d6(?'$ .otor is with grade , insulation syste"% sealing or static winding of welding sealing$ .otor bearing structure is sealed% be able to isolate feculence and water and lubricant can not enter into winding$ 6earing te"perature "easuring ele"ent adopts double supporters type and is reliably installed$ Downlead and drie line of te"perature detection ele"ent are separated and are led to 7unction bo separately$ 2$$@ 3educer trans"ission is stable and reliable and be with nine sealing and oil lea/age$ 2.1., )ransducer AC !o-er Suppl# !arameter
3ated oltage
>80B
Boltage nor"al ariation range
L0IM0I
6us line oltage when "otor start auto"atically as a whole
10I Nn
6us line oltage when high oltage and low oltage start in series
::I Nn
3ated fre!uency
:0C
,re!uency ariation range
L>IM>I
short circuit current at >80B bus line side
:0/? (effectie alue'
;eutral point
;onearth syste"
2.1. /C !o-er Suppl#: D# Suppl#: D# dries 220B% D# control 0B$ Transducer has the function of cutting off power for loc/ing within li"ited ti"e% that is% power supply recoers after a long ti"e of power cutting of bus line% and transducer will not start i""ediately$ #urrent li"it control% li"it "ai"u" current be within $0M$ rated alue (including starting and speed regulating'% that is constant tor!ue control$ E"ergency button and current signal can satisfy re"ote trans"ission$ -t is able to start auto"atically after instantaneous power cutting and continue state before power cutting off to satisfy current re!uire"ent$ rotection functions of transducer% "otor "otor short circuit and oerload are co"pleted inside transducer% the buyer supply power to transducer through air brea/er$ ;o har"ful effect should happen to e!uip"ents at state grid side% such as insulation da"age% protection control syste" error etc$ Car"onious wae produced by fre!uency conersion speed regulation syste" not only can satisfy regulation of OG65T 4:49 ower energy !uality co""on grid har"onious wae% but but also OG65T>921 electro"agnetic co"patibility of industrial process "easuring and control deice and related electro"agnetis" co"patibility re!uire"ent of PG65T4:98$ 9、G65T4:98$0、G65T4:98$>、G65T4:98$4Q$ E!uip"ent supplier supplies proper fittings to allow "any transducers being connected in parallel on the sa"e bus line$ Transducer "ain technical para"eter -nput rectifying bridge 2 i"pulse or higher -nerter type
Boltage source type
-nerter power ele"ent
-G6T or -G#T
?uiliary power supply
>80B ?#
#ontrol "ode
+. or DT#
utput oltage
sine wae
utput fre!uency
0～:0C
#ooling type
air cooling or forceful air cooling
-solation power supply part
,iberoptic #able
rotection grade
-:4
Transducer control syste" adopts digital "icroprocessor controller$ There is operation interface on transducer cabinet door% there are touching /eyboard and &#D5&ED display on operation interface$ There is start% stop transducer on cabinet door for regulating fre!uency$ 6e with fault dia gnose display$ 1. 2.1.10 nstrumental Meters and Control ?t least there are re"ote re"ote instructions inputs on cabinet cabinet of control bo and drie bo bo of coal
feeder*
Start coal feeder
Stop coal feeder
#ontrol coal feeding a"ount (420"?D#'
?t least there are re"ote re"ote instruction outputs on cabinet cabinet of control bo and drie bo bo of coal feeder* #oal feeder run% stop state
#oal feeder current (420"?D#'
#leaner run% stop state
6elt coneyor "otor fault
#leaner "otor fault
-nstantaneous coal feeding a"ount
?ccu"ulated feeding coal a"ount
#oal flow abnor"al in chute at inlet side of coal feeder (coal bloc/'
#oal flow abnor"al in chute at outlet side of coal feeder (coal bloc/'
#oal feeding rate error high
6elt lac/s coal (coal feeding stopped'
#oal feeder is bloc/ed by coal
erhigh te"perature in coal feeder
&ocal or re"ote control
Se!uence control fault
#ubage running signal
6elt coneyor nor"al running signal
3ubber belt reersal running signal
#oal feeder at least has following interloc/ protections* #oal feeder stops auto"atically according to signal of Ota/e two fro" three when
chute at outlet of coal feeder is seriously bloc/ed +hen belt coneyor "otor is in fault% it cuts off power supply auto"atically
+hen cleaner "otor is in fault% it cuts off power supply auto"atically
-nlet outlet gate ale electriccontrol bo of coal feeder at least hae following functions* .anual control of local electric control bo pen% close coal gate ale
&ocally "anual or re"otely "anual (auto"atic' transfer of control "ode
&ocal electric control bo display* coal gate ale full open% full close #oal feeder electric control bo at least has re"ote instruction input of opening% closing coal gate ale* #oal feeder electric control bo at least has following instruction outputs* #oal gate ale full open% full close
#oal gate ale suffocate to open% close (oer tor!ue'
noff output supplied by seller is passie 7unction signal% its 7unction olu"e is no less than 220B ?# >?% 220B D# ?$ 2. 2.1.11 !erformance uarantee $ utput regulation range* ～0t5h #oal feeder "easuring precision* H0$2:I 2$ #oal feeder control precision* H 0$:I >$ ;oise (" away' R@:d6（ ?）
4$
ower consu"ption* 8/+ . 2.1.12 Equipment adius and nterface e'ulations n coal feeder% fro" coal bun/er outlet flange connection to connection of chute in "iddle of "ill% including (but not li"ited'* #oal feeder proper (including "otor% reducer% electronic weighing syste"' $ Electric control bo% drie bo 2$ -nlet% outlet coal gate ale (including electricdrien deice and control bo' >$ -nlet and outlet chute 4$ #oal flow superisor :$ 3egulable connector 1$ #ounter flflange and titightening fifittings are offered to al all flflange interfaces @$ .aintenance chain 8$ 3eersal turning "aterial unloading slot 9$ .aintenance platfor" car 0$ Spare parts $ Special tools &. 2.1.1 Equipment Component roduction ;o$ ;a"e Specification Nnit )ty .anufa .anufactu cturer rer 3e"ar/ 3e"ar/ area #oal feeder proper (pressure resist resistant ant sleee sleee%% roller roller coal coal flow flow "oldin "olding g deice deice%% roller roller%% sleee sleee%% belt% belt% antie antiepl plosi osion on ligh lighti ting ng dei deice ce%% clea clean ning ing chai chain% n% coal coal s"as s"ashi hing ng hole% hole% EG2490 set 1 Shenyang ST#K tensioning deice% "ain "ainte tena nanc nce e al ale% e% watc watch h hole% hole% seal sealin ing g air air inte interf rfac ace% e% "anual "anual ale ale coal coal sa"plin sa"pling g deice deice%% all flange flange and bolts bolts tightening piece' #oal feeder control cabinet (integrated with drie cabinet' .ainly contain following set 1 parts* piece 1 91 "icroprocessor controller piece 1 -nteger Transducer 2 91;T .# piece 1 ?"eric ?"erica a ST#K i"port Display panel and /eyboard set 1 ower supply plate set 1 ? card（input card） set 2 ?2 card（,eedbac/ card） ?5D conerter -nlet coal gate ale (inc includin ding "otordr drien > deice% control bo% raw coal >133B6 set 1 Shenyang ST#K bun/ bun/er er outl outlet et flan lange and and tightening fittings' utlet coal gate ale 4 (inc includin ding "otordr drien 2433B6S set 1 Shenyang ST#K deice% control bo' #lean chain drie "otor and : ?E00 set 1 he7iang -E reducer
3otating "easuring detector .aintenance chain 3egula 3egulable ble connec connector tor (inlet (inlet%% outlet' -nlet and outlet chute Elec Electr tron onic ic weig weighi hing ng syst syste" e" .ain .ainly ly incl includ uding ing foll follow owin ing g parts +eighing sensor +eig +eighi hing ng roll roller er 6earing Seal Sealin ing g ring ring +eighing subasse"blies
Nnit )ty set
1
he7iang
-E
set
8
?"erica
ST#K
set
1
?"erica
ST#K
set
1
Shenyang
ST#K
set
1
set set
1 1
Special +ui instru"ental "eter ?"erica ST#K Shenyang ST#K
set
1
Shenyang
ST#K
set set set
1 1
Shenyang
ST#K
?"erica
ST#K
piece
2
piec piece e 1 piece 2 piec piece e 24 leer
roduction .anufa .anufactu cturer rer 3e"ar/ 3e"ar/ area
piece 2 piece
(. ;o $ 2 > 4 : 1 @
8 9
2.1.1& Special )ools Specificatio ;a"e n lane lane calibr calibrati ation on leer ("easuring ("easuring feeler gauge' Detector (no"inal detector' #able of detector Glisten paper ;o"inal poise 3oller wheel dis"antling seat 3oller lifting leer 3oller wheel connec connectio tion n leer leer (eten (etensio sion n guide guide trac/' Tool bo
roductio n area
.anufacture r
3e"ar/
Shenyang
ST#K
Special tool for "easuring
?"erica
ST#K
?"erica
ST#K
?"erica
>.
Shenyang
ST#K
Shenyang
ST#K
Shenyang
ST#K
piec e
2
Shenyang
ST#K
piec
Shenyang
ST#K
Nnit piec e piec e piec e piec e piec e piec e piec e
)t y 2
2 2 1 2
Specia Speciall tool tool for "aintenance
;o $
;a"e
Specificatio n
Nnit e piec e piec e
3eersal coal discharging slot .aintenance platfor" car +. 2.1.1( mported !iece 3ist Specificatio ;o$ ;a"e n Electric weighing syste" .ainly including following parts* +eighing sensor +eighing roller 6earing Sealing ring +eighing leer subasse"blies 0
outle utlett coal coal bloc bloc/ / alar" deice > #oal feeding control 91;T syste"* .# 91 "icroprocessor controller Transducer (?6' Display panel and /eyboard ower supply plate ? card (input card' ?2 card (feedbac/ card' ?5D conerter 6elt 6elt brea brea/i /ing ng coal coal 4 alar" Spee Speed d "eas "easur urin ing g : deice 1 6earing Dete Detect ctor or (no" (no"in inal al @ detector' $. 2.1.1+ Spare !arts 2$$1$ Spare parts brought with "achine ;a"e
2
?ir brea/er 6earing Scra Scrape perr chai chain n subasse"blies Sealing ring
