CA2206725A1 - Grate element and grate for combustion plants - Google Patents
Grate element and grate for combustion plantsInfo
- Publication number
- CA2206725A1 CA2206725A1 CA002206725A CA2206725A CA2206725A1 CA 2206725 A1 CA2206725 A1 CA 2206725A1 CA 002206725 A CA002206725 A CA 002206725A CA 2206725 A CA2206725 A CA 2206725A CA 2206725 A1 CA2206725 A1 CA 2206725A1
- Authority
- CA
- Canada
- Prior art keywords
- grate
- grate element
- fact
- accordance
- cleaning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
- F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
- F27D15/022—Cooling with means to convey the charge comprising a cooling grate grate plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/12—Fire-bars
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H7/00—Inclined or stepped grates
- F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
- F23H7/08—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding reciprocating along their axes
Abstract
The grate element (1, 2) for a grate in a combustion plant has, on the underside of the grate element head (7) or on the foot (8) of the grate element, recesses (10) which open downward, which serve as air escape orifices for the primary air which is fed from below. Arranged on the back (9) of each grate element there are stationary cleaning projections (11) corresponding to the number of recesses (10), whose cross-sectional shapes are adapted to the cross section of the recesses (10) except for the necessary free play. The cleaning projections (11) are located in the stroke area of the respective overlying grate element, and are of tapered design at least at the end which penetrates into the recess (10). To avoid excessive wear, each grate element (1, 2) can have an overlay (14) consisting ofwear-resistant material on the foot (8) of the grate element.
Description
II~AY. ~1. lhC1 ~:'''P~ r~ HE~ A~o2~2Aoh6~2~ 1997-06-03 NO i~6 P. 3/~4 ~TR~T~. F.r.F.l~l~,NT ANI~ f~ i, FnR fCO~/IRUSTIO~ PT ~T-C
Tl~e present invention relates to ~ grate element for a ~ng grate constIucted of ~ate - ~Ic,ll~nt~ which overlap each other li~ce roof tiles and ~n move lon~i~din~lly re,~i~e to each Gther, through wbich the pnmary ~vmbustion air, which is fed from below, can be guided to the m~r~9n~1 t~ be bume~ which is lying on top of the fin~g grate, with ~
s.~l~cl,~ f or dn~e e;ld and a g~a~e element head The invention also relates to a ~te fo~ a combust~on p~nt and a process for oper~ring the grate.
I'he te~ "grate eleme~t" is to be unde~s~ood as applyin~ to eYery ele~ent which is suitabl~
for fo~ning a ~te floor, independently of whether i~ cooled or ~ wa~e~-cooled grate floor, i~l~syective of the constmc;ion of the ~rate finn~ system, 50 ~OI~g ~S it employ~ gr~te e~ements which overl~p each other like rwf tiles to ~nn g~2tin~ stages.
~ e floors whe~ ~ grate Pl~n~en~ overl~p each othe~ oof tiles~ the ~te element~must haYe air escape or~fices in order to be able ~o fe~d ttlÇ pl'il~lary combustion ai~ from below ~ grate flool~ which aze ~onstruc~ed gf individu31 air~ooled grate bars, the air escape o~ifices are forme~ either at the head ends of the individu~l ~rate ~ars, or on the fl~nks of ~eighboring ~rate ba~s. ~7ith this conflgLIration1 especially ill waste incine~ n p]ants, h~d p~rticles of cinter or small pieces of ~netal scrap can pelletrate into these a.ir escape orifi~es, and ~is effect is fuIther intensified by the stolcing movement of ~he gr~ting ~,tages. Molten non-fesTous metals or bitumen-like subst~n~s can ~Iso penetrate into these air escap~
orifice~! impa~ring the even flow of air to the n~ateriaJ to be burned~
To counter the danger of ~ueh a~r escape ~fi~e~ becoming plu~ged, Gcnnan Patent 41 05 330 Cl ~iscloses a grate ba~ which has ;It the he~d end of the air-c~oled grate bar ~n M~ 17. 39i1 ?: ~,'?h{ ~01~ hERRCI~A~02yAo~l'725 1997-06-03 NC~ r P. i/' air esca~e onfic~e which is directed obliquely downwa~d and which expands uuL~ . In the ~se of another dicelosed air-cooled grate ba~ in accordance wi~h ~ermarl P~ten~
42 0~ 502 C ~ ~he back of the grate bar at the head end is ex~e~ded and aIlgled ~wnward o~er the face of the end of the gr~te ~ so that the b~ck of the ~r~te bar~ ~fhich is pulled downwa~d, fonns a lip overlapping the fac~ en~, which ~ip lilI~ts the air escape orifice, whose outflow emerges pal~llel to the face of the head en~ oth kno~n implementations reduce the p~oblerns explaiTIed above, bilt fail to elïmin~te ~hem completely.
The object o~ the present inventlon is to ~reate a grate eIement and a gs~te for combustion plarles w~ich elimin~t~$ the daII~er of ~ s~oppage of the air passage an~ r~kes cleaning the air passa~e simple.
Under this invent.ion, this problem is solved on the ~asis of a grate element of the type d~sctihed at the be~inning7 by the fact that the a~r ~utlet for ~he primary combustion ~ir is on the bottom si~ of the gr~te element head, open~n~ downw~rd, and that there is a leas~ one fixed cleaDing proJe~tion on the top of each ~rate element ~or the air outlet of ~e ~rate elelnent which lies a~ove it in the ~ssembled state.
Config~ring the aif otlllet on the underside of the gr~te slement head is an especially favo~a~le means of providing ~ w~y f~r blowiTl~ cut light and s~ll particles which t~ave entered ~e ai~ outlet, and fu3 Li-~nx~ore thc cl~nlng projection or projections n~c~ bnng abollt a clcaning of the air oudet, even in ~he c~se of s~ongly wedged cinder particles or eYen mol~n ma~,ses. This ensures the a~roi~ance of incomplete combustion processes OFo~rh~in~ and conseqLIent dam~ge to g~a~e elernPl~tc~ whiçh lead to ~el~ively long penods of down time for the repla~eluent of such damaged gr~te elements. Since the air outlet on the undelside cf each grate element opens downw~rd7 the res~c~ing ~all v~ the ai~ outlet, which is formed by the grate elemP~tr which lies beneath it in a~ ~csemb1A~I finng ~rase, is in m~tion relative to dle upper hmit~ng w~ll a~,si~ned to the grate element d~r~ng ev~ry stolcing strol~e, so that tb.is relative n~otion itself b~ings ~bout a good c~ g of solid p~ticles from the air flow path.
An addition~l advantageous extension of the invention consiSts in posi~ioning the ele~ninE
projection or proj~ctions in the rear area which faces the ~ n~ or driYe end ~f the ~rate MA . . 7 ~ ~ g ~ ?~ r~ EF~ A~'~02~o~Ts72~i 1 997 - 06 - 03 NCi 8 rl 6 P.
el~ n~ By tllis means! reg~rdless o~ whetlle~ tlle gra~e elem~nt belongs to a fixcd ~a~in~
sta~e or a nlo~ing g~tin~ stage,7 the c1~nin~ process takes place by means of eYen~ cleaning projection duling an ope~ting phase in which p~shin~ pressure is relieve~ ~t th~ f~e of the ~rate element head, between the gr~te element head and the matenai t~ be bu~ned in front of it. This prevents additio~ terial to bc bu~ned from being pressed throu~h the air olltlet ~y the rcla~ive mo~.~ement between the ~leaning proje&tion ~nd d~e grate çlernent, which would increase the quantity wh~ch fall~ throu~h ~e g~ate. ~ this configuration in ~cordance with the mvention, the cl~aning projection or p~ojections are alwa~ts pushed into ~e a~r outlet when ~e col,~syonding grate elements move ~g ~eir position of gTeatest distance from ea~h other, i.e. ~fhen the ~rate elen~ent head of ~e above, driven grate element rno~es lowa~d ~he re~r ~n~h~ent or drive end of the lower, fixed grate element, or the gr~te elen~en; he~d of ~e lo~ver, dr~ven gr~te eiement move3 forward a~ainst the aboYe, fixed grate element fr~m thç latte~'s grate element head.
~n e~p~ej~lly 3dvantagecu~ n~riv~ of the mvention is distin~ chpd by the fact that ev~y cleaning projecdon has a tongue-like sh~pe arld every end which enters into the air outlet is tapered. The tapering of the end of the cleaning projection or pro~eetions which enterS into the a~r outlet exerciseS ~ wedge effeçt on the jamm~d particles, which makes the cleaning easier.
The cro~s-sectional shape of a cle~nin~ p~ojeçtiull does not n~cess~rily need to be adapted to the cross-s~tional shape of the a~r outlçt, cspecially not if possi'Ple blo~kage~ of the air outiet ¢onsist p;~n~rily of solid particlee" ~inc~ t~e re]ative ,rlovement of the one IiTnitin~
wall d~scribed e~lier, in coLnbinaticn with hi~h o~ifice velocities? ~ ke it po~sible to achieve a good cleaning effect. But if molten masses in doughy condition are to be expected it is advisable for the çle~-ing projection or projections to be ad~pted to the cross seçtio n of the air outlet, except for ~ requisi~e freedom of play. Such an e~tension is ~dvanta~eous, es~peci~lly in c~Lnhin~tion with the con~lgur~ion of th~ elearling projeetion with tapere~ e~d d~scrihe~i fu~ther a'oove, since the tapered elld creates an ~d to insertion, because late~al play of a grate element cannot be enti;~ly preven~d.
If, in a further ~xtension of the inYention, the supportin~ and gui~ing surfaee of Ehe grAte ele~nen~ has an ~vetlay consisting of wear~re.e,istant m~te ial, this avoids consl~iction of the T.~ 4 y ~ ~ ; ,. 9 ~ ~: ' 3 P1~ E P - CA1~ o 2 2 0 6 7 2 5 19 97 - 0 6 0 3 N3. 1 ~ I ~ p ~ 4 3ir outlet due to wear, which prolon s the u~ful life of s~ch gra~e elemen~s. Re~q~l~e without such a wea~-resistant overl~y the grate element w~uld drop ~o~n beca~se of wea~, which w~uld make tbe air ou~let on the bottom side smaller.
To colTect sucit ~ear-related constriction of the air o~tlet, re~a~dle~s o~ whether or not the g~ element has a wear-resistant overlay, e~h ¢le~nin~,. proj~ti~n carl have ~n aggres~i~ely ab~asive surf~e, so that with increasin~ wçaring of the ~up~ort and ~uide surfase of ~e gr~te element t~e air outlet is ground f~ee by the abra~ive surfaee of the cleaning pr~jee~on.
~he air outlet can take different fo~ firs~ ~n-bodil~lei,t, the air ~utlet ~an extend ~oss ~~e entire wi~th of the ~rate element. As will be expl~ned in greater d~ail in ~s~-n~lion with a ,~ designe~ in ~~ordance with the invention, s~h a con~ r~ion ~quires ~ itional ~uide for e~h grate element, Since in ~his emb~ment the head ~rea Qf the ~ratc ~Icment cannot ~ie on the grate elemerit beneath. According tO ~ different cm~odiment under the invention, the ai~ outlet can e~ctend over ~e rem~ining rvidth of the ~r~e elemerltt except for two la~e~l ridges whieh serve ~s ~ui~es an~ SU~)pOIt5. Itl this configuration the additional guide c~ be dispensed wi~ ince the rit~es which are left in ~hc are~ of the flanks can res~
on the ~ra.~e elemerlt '~eneath. In a prefeffld embodiment, the air outlet cons;s~s of sever~1 air orifices ~hich are separ~ted from eac!~ od3el b~ ridges. ID this sort of ernbo~iment i~ is ad~ ta~eous eo ~ave cle-~nirl~ projec~ions on the top of each gr~te element colTespondin~
to ~tle num'oer of do~nward-openin,~ ~ir orificcs. This ens~res th~t all of the air oriflces, which in the aggreg~e .eons~ilu~ the air ou.~let, can be cleaned by correspondi~g cleaning projections.
A grate fo~r eombustion plants, havin~g gra~ing stages which 1ie in long~tu~inal rows in the direction in which the m~eAal to be ~urned is fed, overla~p~ng e~h other like roof tiles an~
alternatin~ between mov~ble a~d stationary ~r~tin~ s~gesl c~nstruçeed of indi- idual grate e1ernen~s which extend ~r~s the entire width of the ~te or of nnul$Aple grate ~1. ~e~t~ Iying adjacent to ea~h other in accor~anee wi~ on~ of the c1airns I th~ough 10, is ch~ct~ cd by a support ~ g~ nt ~ on the grate elemen~ h~ad (7) on the station~ry gr~te element ~2)~
and a guid:n~ arr~ngemcnt ,~or each ~r~te element, which hold the underside of the grate element ~ead at ~ distance above lhe und~rlying grate elemen77 to form an air outlet c,c ~ ross the entire width of the ~ate element. Hence ~he ai~ outlet i~ formed by the 9S7 L:~-'?l~ ~1'03r~ EER~'~CA~0~2~2-~01~2~ 1997-06-03 Nv .37~ P. 7/~
fact that the ullderside of t~e grate element head of the g~ate ele~ t whi~h is Iying on top in each case does not li~ direetly on top of the grate ~ cr,L ben~atll, but is held at a sligh~
d~ n~e from the gr~te element beneath by the guide a--Ar.~ t~ eoi.~onding to the~lesired air p~ssage cross section.
~ there are ridges in t~e a~ea of the air outlet, either in the e~ge areas of the ~ate element or dis~ibuted over the width of 211e grate element, then the ~idges v,rhich are loc~ed in the outlet area c~n serve advantageously as a support a~d ~uide amngement for each gr~te element on the ~rate eloment beneath.
In an additional advantageous configuration of the invention, if ~he cleanin~ proJections are Iocated within the air outlet at the stroke reversal state~ closing it to a sukst~tlti~l degr~e, this creates a brief a~r bloc~R~e, which 1eads to a mo~e vigorous bl4wing out of the loasened pa~iclos ~hen the air outle~ is subsçquent~y clea~ed.
To pre~en;t fluid parti~les from slipping or flowing intO the a~r outlet ~t the stroke reve~sal state, in ~n additional ~nfiguration of the in~,entio~ the clePning p~ojection or projecdons c~ protrude slightly o~er the he~d end~ of ~he grate elcments at the stroke reversal state.
However, it is often sufficien- for ~he cle~ning proJection o~ prOjectionS to merel~ stop flu,sh with the head ~f the ~ e element in th~ ~troke roversal position.
A procedure for OyC~ g a ~ate in acco~dance wi~h one of the claims 11 to 15, with st~ble str~ke length for ~e ~vable g~te elem~ntc, iS cha~a~terized by ~he fact ~at after an optional number of stoking strokes the system is set to produce a lon~er cleAnin~ stroke, where the cle~ninE p~o3ection or projections will en~er the ~ir outlet. It is advant~geo~s in this case to jet a cleani~g stroke deperldent upon the air ~l~S~UL~ wlli~h exis~s undemeath the grate elernent ~;vhieh is to ~e re~lated, andl~r upon the ve]oci~ of the p~mary air in this area.
The invention will be desuibed in ~reatel detail in the follo~Ying seetion~ on the basis of a number of sample em~ m~ illust:rated in the drawin~. ~he drawing shows the following, Figure l; a ~raphi~al representation of a first version of gra~e elen~ents which MAY ~ 91 ~ ?M '~I~OD E~R~A~0~2~2~0~72~ 1997-06-03 N~ 876 P. 8/~4 are o~erlapped like ro4f tiles; and Fi~ur~s 2 to 4: ~ddition~l ve~sions of g~te e~eln~r~
As may be seen from~Figure 1, a ~ate for a cQrnhu$tion pl~nt is cons~ucted of a number ~f g~ate el~rn~ntc 1 and ~ which overlap c~ch other like r~of ~ilcs; the grace cleme~s I can be ~oved ba~k and forth in the direçtion of a~ows 12 and 13, and the grate elen~en~s 2 are ~Ixed in position. The grate elements 1 ~rG ~cif~n~d to a drive n~echanism 4, whi~h e_.lcr~.L~s the requisite s~oke for t~e necessa~y stoking movement. The length of stroke and dle s~ohng speed are adjustable, this, a~on~ with a var~e~r of other influenring factors, make it possible ~o influence the combustion process on tlle grate. Every ~ e elem~nt, in~rp~.n~l~nt of how it is constmcted, has an o~t ~rhm~nt or dnve end 5 whlch is hwked into a holder 67 where this holde~ is ~Irrnly conl~ec~d to the drive device 1 in ~he c~se of the driven gr~te elements.
addition, each gr~te elements has a head end 7, a foot 8 and a back ~.
On ~e foot 8 of the grate elemem the~e are a number of recesses 10 ~4hich open downward, which se~e as air escape orifices for the prima~r air, which is fed from below. These air escape orificcs constihlte the a~r outlet.
On the back 9 of each grate element, preferably in the re~r area which faces the ~tr~ m~nt or d~ive e~d S, th0re a~e e]e~-lin~ projections 11 in fixed position' their nu~nber corresponds to ~e nurnber of air escape orifices 10 'rhe cross sec~onal shape of ea~h cle~nin~ proj~ctiorl 11 is ~apted to the cross se~ir n~l shape of ~he air escape onfice 10, except for requisite free p~ay, al~d the cleaning projections 11 are located within ~e attainable stroke ran~e o~ the overlying grate element. rn tbis way, wi~ each cleaning push the cleaning proje~tions 11 ,r- ~t- -~' into the a~r es~pe orifices 10 ~etween swo c~rrespondin~ gr~te elements I ~nd 2, and in so doing d~ey remov~ ~e solid particles or molten mas~es which have entered there.
~lle cle~ning pr~jections can have tapered ends, ~o make ~t e~sier to introduce them into the air escape orifices lû and to exercise a cercain wedge effect on the p~ticles which are ~ammed chere.
The tenn cle~~lin~ st~oke is used for the ]ongest stroke which can b~ set with the dr~ve l, r~h ~ . jS7T1 4 ~ependin~ upon how much risk there is o~ blockage of the air outlet ~o~med 9 1 G 4 P I~l ';! 5 t' 3 ~; ~ R F~ ~ cA~ 0 2 2 0 6 7 2 j 1 9 9 7 - 0 6 - 0 3 ~ I~ ! 8 ? û P ~ / L 4 by the air ex~t onfices 10, cleanin~ strokes can be set with the app,o~l;ate frequency. The co~r~s~onding adjustment pro~edures a~e carried out in ~ccordance with the air pressure andfor air Yelocity which prevail ~ the area ~e~eath the grate element which is ta be regulated.
the cl~nin~ p~ojec~ions are loc2ted in the rear ~rea of each g~ate element, an~ sti]l within the ~le~ni~ stroke, then the ~ir escape orifices 10, for exampJe in the overlying station~y gr~te elenllent 2~ are clea~ed at the end of the fon~ ~ovement in the direction of arro~
by the cle~ni n~ p~oJ~ctions I I which are positioned on the mo~ing grate elcment 1. However, in this phase of the moYement. because of the folward moY~men~ of the grate eleme~t 1, there is no pushing force p~e~ent at the g~e element head 7 of the overlyin~ stauonary grate element 2. The air esc~pe orifices 10 of the movable ~rate element 1, in contrast, are p~netlalcd by the eleaning projections 11 of the underlying stationa~y gra~e element at the end of the baclcward clci~ r strvke, whose direction of mo~ement is in~ic~te~ ~y arrow 13.
~)ue ~o this bacl~ward movement there is also no pushing force p~esent ~t the grate elen~ent head 7 of ~e moving ~ate elemellt 1, whi~h pre~rents solid palticle~ from being pushed into the air escape orif~ces 10 b~ the cl~nin~ projections 11~ The ~le~ning projections 1 I can also be positioned at other locations~ however, so long as c~re is t~ken to ensure that ~ey c~n ~net.~te into the a~r escape onfices 10 ~ r them ~ithin the ~t~in~hlG 3troke ra~ge.
The ridges 3 which rem~n in the m~ginal area ~nd b~..~n the air esc~pe orifices 10, which are in ~e foTm of downw~d-openlng recesses. serv~ as ~ support ~nd ~uide alTan~ement, aIld rest on the respective grate back g of ~he underlying gra~e elem~ni To avoid excessive ~rasion of the nd~es 3 on the foot ~ of the ~rate element~ whieh would le~d to a redu~tion in size of th~ ai~ escape orifice~s~ each ridge 3 ~an be equipped with a wea~-resist~llt overl~y 14~ In the absen~e of cuc~ an abrasion-tesi~tant ~verlay 141 e~ch ~e~nin~ p~oje~tion 1 I c~n have ~ abrasive suIf~ce 15 on its top~ ~o that wi~h e~h cleaning stroke the upper edges of the ai~ esc~pe ori~ 10 are ground oK to collespond to the wea~
on the ~idges 3, so that for a certain operating pe~iod this re-~nding of Ihe ~ir escape onfices 10 makes it possible to corl~nue oper~tion of the grate elements despite the ~ear w~ich h~s U~ , since the reduc~ion in size of the air escape orifioes whicll ~sually occu~s due to the wea~ on the foot of the grate element ~r on lhe r~dges ~ is canceled by this ~nding effect.
Tl~e present invention relates to ~ grate element for a ~ng grate constIucted of ~ate - ~Ic,ll~nt~ which overlap each other li~ce roof tiles and ~n move lon~i~din~lly re,~i~e to each Gther, through wbich the pnmary ~vmbustion air, which is fed from below, can be guided to the m~r~9n~1 t~ be bume~ which is lying on top of the fin~g grate, with ~
s.~l~cl,~ f or dn~e e;ld and a g~a~e element head The invention also relates to a ~te fo~ a combust~on p~nt and a process for oper~ring the grate.
I'he te~ "grate eleme~t" is to be unde~s~ood as applyin~ to eYery ele~ent which is suitabl~
for fo~ning a ~te floor, independently of whether i~ cooled or ~ wa~e~-cooled grate floor, i~l~syective of the constmc;ion of the ~rate finn~ system, 50 ~OI~g ~S it employ~ gr~te e~ements which overl~p each other like rwf tiles to ~nn g~2tin~ stages.
~ e floors whe~ ~ grate Pl~n~en~ overl~p each othe~ oof tiles~ the ~te element~must haYe air escape or~fices in order to be able ~o fe~d ttlÇ pl'il~lary combustion ai~ from below ~ grate flool~ which aze ~onstruc~ed gf individu31 air~ooled grate bars, the air escape o~ifices are forme~ either at the head ends of the individu~l ~rate ~ars, or on the fl~nks of ~eighboring ~rate ba~s. ~7ith this conflgLIration1 especially ill waste incine~ n p]ants, h~d p~rticles of cinter or small pieces of ~netal scrap can pelletrate into these a.ir escape orifi~es, and ~is effect is fuIther intensified by the stolcing movement of ~he gr~ting ~,tages. Molten non-fesTous metals or bitumen-like subst~n~s can ~Iso penetrate into these air escap~
orifice~! impa~ring the even flow of air to the n~ateriaJ to be burned~
To counter the danger of ~ueh a~r escape ~fi~e~ becoming plu~ged, Gcnnan Patent 41 05 330 Cl ~iscloses a grate ba~ which has ;It the he~d end of the air-c~oled grate bar ~n M~ 17. 39i1 ?: ~,'?h{ ~01~ hERRCI~A~02yAo~l'725 1997-06-03 NC~ r P. i/' air esca~e onfic~e which is directed obliquely downwa~d and which expands uuL~ . In the ~se of another dicelosed air-cooled grate ba~ in accordance wi~h ~ermarl P~ten~
42 0~ 502 C ~ ~he back of the grate bar at the head end is ex~e~ded and aIlgled ~wnward o~er the face of the end of the gr~te ~ so that the b~ck of the ~r~te bar~ ~fhich is pulled downwa~d, fonns a lip overlapping the fac~ en~, which ~ip lilI~ts the air escape orifice, whose outflow emerges pal~llel to the face of the head en~ oth kno~n implementations reduce the p~oblerns explaiTIed above, bilt fail to elïmin~te ~hem completely.
The object o~ the present inventlon is to ~reate a grate eIement and a gs~te for combustion plarles w~ich elimin~t~$ the daII~er of ~ s~oppage of the air passage an~ r~kes cleaning the air passa~e simple.
Under this invent.ion, this problem is solved on the ~asis of a grate element of the type d~sctihed at the be~inning7 by the fact that the a~r ~utlet for ~he primary combustion ~ir is on the bottom si~ of the gr~te element head, open~n~ downw~rd, and that there is a leas~ one fixed cleaDing proJe~tion on the top of each ~rate element ~or the air outlet of ~e ~rate elelnent which lies a~ove it in the ~ssembled state.
Config~ring the aif otlllet on the underside of the gr~te slement head is an especially favo~a~le means of providing ~ w~y f~r blowiTl~ cut light and s~ll particles which t~ave entered ~e ai~ outlet, and fu3 Li-~nx~ore thc cl~nlng projection or projections n~c~ bnng abollt a clcaning of the air oudet, even in ~he c~se of s~ongly wedged cinder particles or eYen mol~n ma~,ses. This ensures the a~roi~ance of incomplete combustion processes OFo~rh~in~ and conseqLIent dam~ge to g~a~e elernPl~tc~ whiçh lead to ~el~ively long penods of down time for the repla~eluent of such damaged gr~te elements. Since the air outlet on the undelside cf each grate element opens downw~rd7 the res~c~ing ~all v~ the ai~ outlet, which is formed by the grate elemP~tr which lies beneath it in a~ ~csemb1A~I finng ~rase, is in m~tion relative to dle upper hmit~ng w~ll a~,si~ned to the grate element d~r~ng ev~ry stolcing strol~e, so that tb.is relative n~otion itself b~ings ~bout a good c~ g of solid p~ticles from the air flow path.
An addition~l advantageous extension of the invention consiSts in posi~ioning the ele~ninE
projection or proj~ctions in the rear area which faces the ~ n~ or driYe end ~f the ~rate MA . . 7 ~ ~ g ~ ?~ r~ EF~ A~'~02~o~Ts72~i 1 997 - 06 - 03 NCi 8 rl 6 P.
el~ n~ By tllis means! reg~rdless o~ whetlle~ tlle gra~e elem~nt belongs to a fixcd ~a~in~
sta~e or a nlo~ing g~tin~ stage,7 the c1~nin~ process takes place by means of eYen~ cleaning projection duling an ope~ting phase in which p~shin~ pressure is relieve~ ~t th~ f~e of the ~rate element head, between the gr~te element head and the matenai t~ be bu~ned in front of it. This prevents additio~ terial to bc bu~ned from being pressed throu~h the air olltlet ~y the rcla~ive mo~.~ement between the ~leaning proje&tion ~nd d~e grate çlernent, which would increase the quantity wh~ch fall~ throu~h ~e g~ate. ~ this configuration in ~cordance with the mvention, the cl~aning projection or p~ojections are alwa~ts pushed into ~e a~r outlet when ~e col,~syonding grate elements move ~g ~eir position of gTeatest distance from ea~h other, i.e. ~fhen the ~rate elen~ent head of ~e above, driven grate element rno~es lowa~d ~he re~r ~n~h~ent or drive end of the lower, fixed grate element, or the gr~te elen~en; he~d of ~e lo~ver, dr~ven gr~te eiement move3 forward a~ainst the aboYe, fixed grate element fr~m thç latte~'s grate element head.
~n e~p~ej~lly 3dvantagecu~ n~riv~ of the mvention is distin~ chpd by the fact that ev~y cleaning projecdon has a tongue-like sh~pe arld every end which enters into the air outlet is tapered. The tapering of the end of the cleaning projection or pro~eetions which enterS into the a~r outlet exerciseS ~ wedge effeçt on the jamm~d particles, which makes the cleaning easier.
The cro~s-sectional shape of a cle~nin~ p~ojeçtiull does not n~cess~rily need to be adapted to the cross-s~tional shape of the a~r outlçt, cspecially not if possi'Ple blo~kage~ of the air outiet ¢onsist p;~n~rily of solid particlee" ~inc~ t~e re]ative ,rlovement of the one IiTnitin~
wall d~scribed e~lier, in coLnbinaticn with hi~h o~ifice velocities? ~ ke it po~sible to achieve a good cleaning effect. But if molten masses in doughy condition are to be expected it is advisable for the çle~-ing projection or projections to be ad~pted to the cross seçtio n of the air outlet, except for ~ requisi~e freedom of play. Such an e~tension is ~dvanta~eous, es~peci~lly in c~Lnhin~tion with the con~lgur~ion of th~ elearling projeetion with tapere~ e~d d~scrihe~i fu~ther a'oove, since the tapered elld creates an ~d to insertion, because late~al play of a grate element cannot be enti;~ly preven~d.
If, in a further ~xtension of the inYention, the supportin~ and gui~ing surfaee of Ehe grAte ele~nen~ has an ~vetlay consisting of wear~re.e,istant m~te ial, this avoids consl~iction of the T.~ 4 y ~ ~ ; ,. 9 ~ ~: ' 3 P1~ E P - CA1~ o 2 2 0 6 7 2 5 19 97 - 0 6 0 3 N3. 1 ~ I ~ p ~ 4 3ir outlet due to wear, which prolon s the u~ful life of s~ch gra~e elemen~s. Re~q~l~e without such a wea~-resistant overl~y the grate element w~uld drop ~o~n beca~se of wea~, which w~uld make tbe air ou~let on the bottom side smaller.
To colTect sucit ~ear-related constriction of the air o~tlet, re~a~dle~s o~ whether or not the g~ element has a wear-resistant overlay, e~h ¢le~nin~,. proj~ti~n carl have ~n aggres~i~ely ab~asive surf~e, so that with increasin~ wçaring of the ~up~ort and ~uide surfase of ~e gr~te element t~e air outlet is ground f~ee by the abra~ive surfaee of the cleaning pr~jee~on.
~he air outlet can take different fo~ firs~ ~n-bodil~lei,t, the air ~utlet ~an extend ~oss ~~e entire wi~th of the ~rate element. As will be expl~ned in greater d~ail in ~s~-n~lion with a ,~ designe~ in ~~ordance with the invention, s~h a con~ r~ion ~quires ~ itional ~uide for e~h grate element, Since in ~his emb~ment the head ~rea Qf the ~ratc ~Icment cannot ~ie on the grate elemerit beneath. According tO ~ different cm~odiment under the invention, the ai~ outlet can e~ctend over ~e rem~ining rvidth of the ~r~e elemerltt except for two la~e~l ridges whieh serve ~s ~ui~es an~ SU~)pOIt5. Itl this configuration the additional guide c~ be dispensed wi~ ince the rit~es which are left in ~hc are~ of the flanks can res~
on the ~ra.~e elemerlt '~eneath. In a prefeffld embodiment, the air outlet cons;s~s of sever~1 air orifices ~hich are separ~ted from eac!~ od3el b~ ridges. ID this sort of ernbo~iment i~ is ad~ ta~eous eo ~ave cle-~nirl~ projec~ions on the top of each gr~te element colTespondin~
to ~tle num'oer of do~nward-openin,~ ~ir orificcs. This ens~res th~t all of the air oriflces, which in the aggreg~e .eons~ilu~ the air ou.~let, can be cleaned by correspondi~g cleaning projections.
A grate fo~r eombustion plants, havin~g gra~ing stages which 1ie in long~tu~inal rows in the direction in which the m~eAal to be ~urned is fed, overla~p~ng e~h other like roof tiles an~
alternatin~ between mov~ble a~d stationary ~r~tin~ s~gesl c~nstruçeed of indi- idual grate e1ernen~s which extend ~r~s the entire width of the ~te or of nnul$Aple grate ~1. ~e~t~ Iying adjacent to ea~h other in accor~anee wi~ on~ of the c1airns I th~ough 10, is ch~ct~ cd by a support ~ g~ nt ~ on the grate elemen~ h~ad (7) on the station~ry gr~te element ~2)~
and a guid:n~ arr~ngemcnt ,~or each ~r~te element, which hold the underside of the grate element ~ead at ~ distance above lhe und~rlying grate elemen77 to form an air outlet c,c ~ ross the entire width of the ~ate element. Hence ~he ai~ outlet i~ formed by the 9S7 L:~-'?l~ ~1'03r~ EER~'~CA~0~2~2-~01~2~ 1997-06-03 Nv .37~ P. 7/~
fact that the ullderside of t~e grate element head of the g~ate ele~ t whi~h is Iying on top in each case does not li~ direetly on top of the grate ~ cr,L ben~atll, but is held at a sligh~
d~ n~e from the gr~te element beneath by the guide a--Ar.~ t~ eoi.~onding to the~lesired air p~ssage cross section.
~ there are ridges in t~e a~ea of the air outlet, either in the e~ge areas of the ~ate element or dis~ibuted over the width of 211e grate element, then the ~idges v,rhich are loc~ed in the outlet area c~n serve advantageously as a support a~d ~uide amngement for each gr~te element on the ~rate eloment beneath.
In an additional advantageous configuration of the invention, if ~he cleanin~ proJections are Iocated within the air outlet at the stroke reversal state~ closing it to a sukst~tlti~l degr~e, this creates a brief a~r bloc~R~e, which 1eads to a mo~e vigorous bl4wing out of the loasened pa~iclos ~hen the air outle~ is subsçquent~y clea~ed.
To pre~en;t fluid parti~les from slipping or flowing intO the a~r outlet ~t the stroke reve~sal state, in ~n additional ~nfiguration of the in~,entio~ the clePning p~ojection or projecdons c~ protrude slightly o~er the he~d end~ of ~he grate elcments at the stroke reversal state.
However, it is often sufficien- for ~he cle~ning proJection o~ prOjectionS to merel~ stop flu,sh with the head ~f the ~ e element in th~ ~troke roversal position.
A procedure for OyC~ g a ~ate in acco~dance wi~h one of the claims 11 to 15, with st~ble str~ke length for ~e ~vable g~te elem~ntc, iS cha~a~terized by ~he fact ~at after an optional number of stoking strokes the system is set to produce a lon~er cleAnin~ stroke, where the cle~ninE p~o3ection or projections will en~er the ~ir outlet. It is advant~geo~s in this case to jet a cleani~g stroke deperldent upon the air ~l~S~UL~ wlli~h exis~s undemeath the grate elernent ~;vhieh is to ~e re~lated, andl~r upon the ve]oci~ of the p~mary air in this area.
The invention will be desuibed in ~reatel detail in the follo~Ying seetion~ on the basis of a number of sample em~ m~ illust:rated in the drawin~. ~he drawing shows the following, Figure l; a ~raphi~al representation of a first version of gra~e elen~ents which MAY ~ 91 ~ ?M '~I~OD E~R~A~0~2~2~0~72~ 1997-06-03 N~ 876 P. 8/~4 are o~erlapped like ro4f tiles; and Fi~ur~s 2 to 4: ~ddition~l ve~sions of g~te e~eln~r~
As may be seen from~Figure 1, a ~ate for a cQrnhu$tion pl~nt is cons~ucted of a number ~f g~ate el~rn~ntc 1 and ~ which overlap c~ch other like r~of ~ilcs; the grace cleme~s I can be ~oved ba~k and forth in the direçtion of a~ows 12 and 13, and the grate elen~en~s 2 are ~Ixed in position. The grate elements 1 ~rG ~cif~n~d to a drive n~echanism 4, whi~h e_.lcr~.L~s the requisite s~oke for t~e necessa~y stoking movement. The length of stroke and dle s~ohng speed are adjustable, this, a~on~ with a var~e~r of other influenring factors, make it possible ~o influence the combustion process on tlle grate. Every ~ e elem~nt, in~rp~.n~l~nt of how it is constmcted, has an o~t ~rhm~nt or dnve end 5 whlch is hwked into a holder 67 where this holde~ is ~Irrnly conl~ec~d to the drive device 1 in ~he c~se of the driven gr~te elements.
addition, each gr~te elements has a head end 7, a foot 8 and a back ~.
On ~e foot 8 of the grate elemem the~e are a number of recesses 10 ~4hich open downward, which se~e as air escape orifices for the prima~r air, which is fed from below. These air escape orificcs constihlte the a~r outlet.
On the back 9 of each grate element, preferably in the re~r area which faces the ~tr~ m~nt or d~ive e~d S, th0re a~e e]e~-lin~ projections 11 in fixed position' their nu~nber corresponds to ~e nurnber of air escape orifices 10 'rhe cross sec~onal shape of ea~h cle~nin~ proj~ctiorl 11 is ~apted to the cross se~ir n~l shape of ~he air escape onfice 10, except for requisite free p~ay, al~d the cleaning projections 11 are located within ~e attainable stroke ran~e o~ the overlying grate element. rn tbis way, wi~ each cleaning push the cleaning proje~tions 11 ,r- ~t- -~' into the a~r es~pe orifices 10 ~etween swo c~rrespondin~ gr~te elements I ~nd 2, and in so doing d~ey remov~ ~e solid particles or molten mas~es which have entered there.
~lle cle~ning pr~jections can have tapered ends, ~o make ~t e~sier to introduce them into the air escape orifices lû and to exercise a cercain wedge effect on the p~ticles which are ~ammed chere.
The tenn cle~~lin~ st~oke is used for the ]ongest stroke which can b~ set with the dr~ve l, r~h ~ . jS7T1 4 ~ependin~ upon how much risk there is o~ blockage of the air outlet ~o~med 9 1 G 4 P I~l ';! 5 t' 3 ~; ~ R F~ ~ cA~ 0 2 2 0 6 7 2 j 1 9 9 7 - 0 6 - 0 3 ~ I~ ! 8 ? û P ~ / L 4 by the air ex~t onfices 10, cleanin~ strokes can be set with the app,o~l;ate frequency. The co~r~s~onding adjustment pro~edures a~e carried out in ~ccordance with the air pressure andfor air Yelocity which prevail ~ the area ~e~eath the grate element which is ta be regulated.
the cl~nin~ p~ojec~ions are loc2ted in the rear ~rea of each g~ate element, an~ sti]l within the ~le~ni~ stroke, then the ~ir escape orifices 10, for exampJe in the overlying station~y gr~te elenllent 2~ are clea~ed at the end of the fon~ ~ovement in the direction of arro~
by the cle~ni n~ p~oJ~ctions I I which are positioned on the mo~ing grate elcment 1. However, in this phase of the moYement. because of the folward moY~men~ of the grate eleme~t 1, there is no pushing force p~e~ent at the g~e element head 7 of the overlyin~ stauonary grate element 2. The air esc~pe orifices 10 of the movable ~rate element 1, in contrast, are p~netlalcd by the eleaning projections 11 of the underlying stationa~y gra~e element at the end of the baclcward clci~ r strvke, whose direction of mo~ement is in~ic~te~ ~y arrow 13.
~)ue ~o this bacl~ward movement there is also no pushing force p~esent ~t the grate elen~ent head 7 of ~e moving ~ate elemellt 1, whi~h pre~rents solid palticle~ from being pushed into the air escape orif~ces 10 b~ the cl~nin~ projections 11~ The ~le~ning projections 1 I can also be positioned at other locations~ however, so long as c~re is t~ken to ensure that ~ey c~n ~net.~te into the a~r escape onfices 10 ~ r them ~ithin the ~t~in~hlG 3troke ra~ge.
The ridges 3 which rem~n in the m~ginal area ~nd b~..~n the air esc~pe orifices 10, which are in ~e foTm of downw~d-openlng recesses. serv~ as ~ support ~nd ~uide alTan~ement, aIld rest on the respective grate back g of ~he underlying gra~e elem~ni To avoid excessive ~rasion of the nd~es 3 on the foot ~ of the ~rate element~ whieh would le~d to a redu~tion in size of th~ ai~ escape orifice~s~ each ridge 3 ~an be equipped with a wea~-resist~llt overl~y 14~ In the absen~e of cuc~ an abrasion-tesi~tant ~verlay 141 e~ch ~e~nin~ p~oje~tion 1 I c~n have ~ abrasive suIf~ce 15 on its top~ ~o that wi~h e~h cleaning stroke the upper edges of the ai~ esc~pe ori~ 10 are ground oK to collespond to the wea~
on the ~idges 3, so that for a certain operating pe~iod this re-~nding of Ihe ~ir escape onfices 10 makes it possible to corl~nue oper~tion of the grate elements despite the ~ear w~ich h~s U~ , since the reduc~ion in size of the air escape orifioes whicll ~sually occu~s due to the wea~ on the foot of the grate element ~r on lhe r~dges ~ is canceled by this ~nding effect.
Claims (17)
1. A grate element for a firing grate constructed of grate elements which overlap each other like roof tiles and can move longitudinally relative to each other, through which the primary air, which is fed from below, can be guided to the material to be burned which is lying on top of the firing grate, with an attachment or drive end and a grate element head, characterized by the fact that the cleaning projection (11) or projections are located in the rear area, which faces the attachment or drive end (5) of the grate element (1, 2).
2. The grate element in accordance with claim 1, characterized by the fact that the cleaning projection (11) or projections are located in the rear area which faces the attachment or drive end (5) of the grate element (1,2).
3. The grate element in accordance with claim 1 or 2, characterized by the fact that each grate projection (11) is in the shape of a tongue and each end which enters the air outlet (10) is tapered.
4. The grate element in accordance with one of claims 1 through 3, characterized by the fact that the grate projection or projections is (are) adapted to the cross section of the air outlet (10), except for necessary free play.
5. The grate element in accordance with one of claims 1 through 4, characterized by the fact that its support and guide surface (3) has an overlay (14) made of wear-resistant material.
6. The grate element in accordance with one of claims 1 through 5, characterized by the fact that each cleaning projection (11) has on its top side a highly abrasive surface (15).
7. The grate element in accordance with one of claims 1 through 6, characterized by the fact that the air outlet (10) extends across the entire width of the grate element (1, 2),
8. The grate element in accordance with one of claims 1 though 6, characterized by the fact that the air outlet (10) extends across the entire width of the grate element (1, 2) except for two ridges (3) at the sides which serve as guides and supports.
9. The grate element in accordance with one of claims 1 through 6, characterized by the fact that the air outlet (10) consists of a number of air escape orifices which are separated from each other by ridges (3).
10. The grate element in accordance with claim 9, characterized by the fact that there are cleaning projections (11) on the top of each grate element (1, 2) corresponding to the number of downward-opening air escape orifices (10), which take the form of recesses which open downward.
11. A grate for combustion plants, having grating stages which lie in longitudinal rows in the direction in which the material to be burned is fed, overlapping each other like roof tiles and alternating between movable and stationary grating stages, constructed of individual grate elements which extend over the entire width of the grate or of multiple grate elements lying adjacent to each other in accordance with one of the claims 1 through 10, characterized by a support arrangement (16) on the grate element head (7) on the stationary grate element (2), and a guiding arrangement (17, 18) for each movable grate element (1), which hold underside (8) of the grate element head (7) at a distance above the underlying grate element, to form an air outlet (10) extending across the entire width of the grate element.
12. A grate for combustion plants, having grating stages which lie in longitudinal rows in the direction in which the material to be burned is fed, overlapping each other like roof tiles and alternating movable and stationary grating stages, constructed of individual grate element which extend over the entire width of the grate or of multiple grate elements lying adjacent to each other in accordance with one of the claims 1 through 10.
characterized by the fact that the ridges (3) in the area of the outlet (10) serve as a support and guide arrangement for each grate element (1, 2) on the underlying grate element.
characterized by the fact that the ridges (3) in the area of the outlet (10) serve as a support and guide arrangement for each grate element (1, 2) on the underlying grate element.
13. The grate in accordance with claim 11 or 12, characterized by the fact that the cleaning projections (11) are located within the air outlet (10) in the stroke reversal state and close the latter to a significant degree.
14. The grate in accordance with claim 13, characterized by the fact that the cleaning projections (11) protrude slightly past the head end (7) of the grate element in she stroke reversal state.
15. The grate in accordance with claim 13, characterized by the fact that the cleaning projections (11) end up flush with the head end (7) of the grate element in the stroke reversal state.
16. A procedure for operating a grate which is in accordance with one of claims 11 through 15, with adjustable stroke length of the movable grate elements, characterized by the fact that after an optional number of stoking strokes the system is set to produce a longer cleaning stroke, where the cleaning projection or projections will enter the air outlet.
17. The procedure in accordance with claim 16, characterized by the fact that a cleaning stroke is set dependent upon the air pressure and/or speed of the primary air which prevail in the area beneath the grate element which is to be regulated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19622423.3 | 1996-06-04 | ||
| DE19622423A DE19622423C1 (en) | 1996-06-04 | 1996-06-04 | Element for grille in heating systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2206725A1 true CA2206725A1 (en) | 1997-12-04 |
Family
ID=7796126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002206725A Abandoned CA2206725A1 (en) | 1996-06-04 | 1997-06-03 | Grate element and grate for combustion plants |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0811804A3 (en) |
| JP (1) | JPH1054535A (en) |
| BR (1) | BR9703441A (en) |
| CA (1) | CA2206725A1 (en) |
| CZ (1) | CZ292189B6 (en) |
| DE (1) | DE19622423C1 (en) |
| NO (1) | NO972546L (en) |
| PL (1) | PL320321A1 (en) |
| RU (1) | RU2127851C1 (en) |
| SG (1) | SG47227A1 (en) |
| TW (1) | TW338785B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278623A (en) * | 2017-01-06 | 2018-07-13 | 贵州中烟工业有限责任公司 | A kind of fire grate segment, fire grate and boiler |
| US10309648B2 (en) | 2016-11-22 | 2019-06-04 | General Electric Company | System and method for active cooling of a grate bar for an incinerator of a waste-to-energy plant |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100226989B1 (en) * | 1996-11-27 | 1999-10-15 | 장병주 | Anti-erosion system of grate in stoker type incinerator |
| EP1760400B1 (en) | 2005-09-06 | 2009-01-07 | Ernst Schenkel | Water cooled grate element |
| FR2894012B1 (en) * | 2005-11-28 | 2008-01-18 | Cometal France Sarl | INCINERATION OVEN GRID BAR |
| KR100830199B1 (en) | 2007-05-08 | 2008-05-16 | 주식회사 진화메탈 | Liner preventing clinker attachment in incinerator and installation structure thereof |
| KR101054561B1 (en) | 2009-09-16 | 2011-08-04 | 이수현 | Grate structure to prevent clinker attachment |
| JP5871541B2 (en) * | 2011-09-29 | 2016-03-01 | 荏原環境プラント株式会社 | Stoker-type incinerator grate mounting structure and stoker-type incinerator |
| KR101307252B1 (en) * | 2013-04-09 | 2013-09-11 | (주)태종 | The method of structuring grate surface for waste incinerating apparatus |
| EP3798515B1 (en) * | 2015-06-12 | 2023-08-23 | Hitachi Zosen Inova AG | Grate block for a combustion grate |
| CN105953246B (en) * | 2016-06-08 | 2018-03-20 | 青岛德施普工程技术有限公司 | High temperature furnace slag dry calibration and the wind-distributing bed material system of conveying |
| CN105927968A (en) * | 2016-06-08 | 2016-09-07 | 青岛德施普工程技术有限公司 | Wind distribution bed material system for boiler combustion |
| CN106090899B (en) * | 2016-06-08 | 2018-03-20 | 青岛德施普工程技术有限公司 | Fluidized-bed combustion boiler geomantic omen double bed lag cooler |
| CN114526486B (en) * | 2022-02-18 | 2022-12-02 | 江苏大鸿环保设备有限公司 | Grate device for increasing domestic garbage feeding amount |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3926125C1 (en) * | 1989-08-08 | 1990-08-30 | Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De | Incinerator air cooled grate with transverse supports - has several grate bars bolted into groups, clad by wear-resistant plates on top and bottom |
| DE4105330C1 (en) * | 1991-02-18 | 1992-08-06 | Noell - K + K Abfalltechnik Gmbh, 4040 Neuss, De | |
| DE4205502C1 (en) * | 1992-02-22 | 1993-02-18 | Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De | Moving grate on transverse girders, for rubbish incinerator - has grate rod rear protruding over vertical shank of angled grate bar foot, forming gap between shank and downwards flange |
| DE9312738U1 (en) * | 1993-08-25 | 1993-11-11 | Juenger & Graeter Gmbh Feuerfe | Grate element for feed grates, especially for waste incineration plants |
| US5680824A (en) * | 1994-02-07 | 1997-10-28 | Techform Engineering Ag | Process for burning solids with a sliding firebar system |
| DE19607007C2 (en) * | 1996-02-24 | 2002-05-29 | Krc Umwelttechnik Gmbh | Grate with cleaning facilities |
-
1996
- 1996-06-04 DE DE19622423A patent/DE19622423C1/en not_active Expired - Lifetime
-
1997
- 1997-05-21 TW TW086106797A patent/TW338785B/en active
- 1997-05-28 EP EP97108566A patent/EP0811804A3/en not_active Withdrawn
- 1997-06-02 JP JP9144164A patent/JPH1054535A/en not_active Withdrawn
- 1997-06-02 CZ CZ19971687A patent/CZ292189B6/en not_active IP Right Cessation
- 1997-06-02 SG SG1997001871A patent/SG47227A1/en unknown
- 1997-06-03 RU RU97108769/06A patent/RU2127851C1/en not_active IP Right Cessation
- 1997-06-03 PL PL97320321A patent/PL320321A1/en unknown
- 1997-06-03 CA CA002206725A patent/CA2206725A1/en not_active Abandoned
- 1997-06-04 BR BR9703441A patent/BR9703441A/en active Search and Examination
- 1997-06-04 NO NO972546A patent/NO972546L/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10309648B2 (en) | 2016-11-22 | 2019-06-04 | General Electric Company | System and method for active cooling of a grate bar for an incinerator of a waste-to-energy plant |
| CN108278623A (en) * | 2017-01-06 | 2018-07-13 | 贵州中烟工业有限责任公司 | A kind of fire grate segment, fire grate and boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| NO972546L (en) | 1997-12-05 |
| CZ168797A3 (en) | 1997-12-17 |
| PL320321A1 (en) | 1997-12-08 |
| EP0811804A2 (en) | 1997-12-10 |
| RU2127851C1 (en) | 1999-03-20 |
| TW338785B (en) | 1998-08-21 |
| DE19622423C1 (en) | 1997-07-10 |
| JPH1054535A (en) | 1998-02-24 |
| BR9703441A (en) | 1998-09-01 |
| CZ292189B6 (en) | 2003-08-13 |
| NO972546D0 (en) | 1997-06-04 |
| SG47227A1 (en) | 1998-03-20 |
| EP0811804A3 (en) | 1999-05-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |