DK177030B1 - Stoker boiler with ash extractor - Google Patents
Stoker boiler with ash extractor Download PDFInfo
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- DK177030B1 DK177030B1 DKPA200800002A DKPA200800002A DK177030B1 DK 177030 B1 DK177030 B1 DK 177030B1 DK PA200800002 A DKPA200800002 A DK PA200800002A DK PA200800002 A DKPA200800002 A DK PA200800002A DK 177030 B1 DK177030 B1 DK 177030B1
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- ash
- cleaning wheel
- boiler
- auger
- stoker
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Abstract
Opfindelsen angår en askeudtager til en stokerkedel (1), hvor stokerkedlen har askeopsamling i bunden af fyrkammeret (2), og hvor askeudtageren (8) er af den type, som omfatter i det mindste en horisontal transportsnegl (9), som er indbygget i bunden af fyrkammeret og hvormed asken transporteres ud fra fS rkammeret til opsamling udenfor stokerkedlen. Opfindelsen er ejendommelig ved i hovedsagen at bestå af et i fyrkammeret (2) indsat og om en lodret akse drejeligt lejret rensehjul (14) af form som en cirkulær skive eller klokke, som er forsynet med fortanding (18) langs periferien. Dette rensehjul er placeret med sin rotationsakse forskudt for centeraksen (9b) i den omtalte horisontale transportsnegl (9) i fyrkammeret, og er med den perifere fortanding i indgreb med sneglevindingerne (9a) på transportsneglen. Under transportsneglens rotation medfører indgrebet, at rensehjulet trækkes med rundt i en roterende bevægelse, hvorunder rensehjulets fortanding afstryger og bearbejder transportsneglen således, at fastsiddende aske på sneglen effektivt løsnes og smuldres. På denne måde sikre man, at transportsneglen bevarer sin evne til at transportere asken ud fra fS rkammeret uanset askens beskaffenhed. Formålstjenligt er rensehjulet (14) forsynet med et antal radiært udragende vinger eller knive (30), hvormed renseeffekten i fyrkammeret yderligere øges. Den øgede renseeffekt er især påkrævet i tilfælde, hvor askens beskaffenhed medfører faste askeophobninger i fyrkammeret. I en særligt foretrukken udførelsesform er rensehjulet fast monteret på en lodret, roterbar aksel (15). Denne aksel, som drives med rundt afrensehjulet, udnyttes til at drive en til formålet indrettet askeafstryger (16) monteret i umiddelbart tilslutning til herden (4) for bearbejdning og afstrygning afophobede og/eller fastbrændte askedaimelser over og omkring herden. Askeafstrygeren er i form og indretning tilpasset herden i den pågældende stokerkedel.The invention relates to an ash extractor for a stoker boiler (1), wherein the stoker boiler has ash collection at the bottom of the combustion chamber (2), and wherein the ash extractor (8) is of the type which comprises at least one horizontal transport auger (9) built into the bottom of the boiler chamber and with which the ash is transported out of the furnace chamber for collection outside the stoker boiler. The invention is characterized in that it consists essentially of a cleaning wheel (14) rotatably mounted in the combustion chamber (2) and rotatable about a vertical axis in the form of a circular disc or bell which is provided with toothing (18) along the periphery. This cleaning wheel is located with its axis of rotation offset by the center axis (9b) in the said horizontal transport auger (9) in the combustion chamber, and is in engagement with the peripheral toothing with the auger turns (9a) on the transport auger. During the rotation of the auger, the engagement causes the cleaning wheel to be pulled around in a rotating motion, during which the toothing of the cleaning wheel scrapes and processes the auger so that the ash on the auger is effectively loosened and crumbled. In this way, it is ensured that the transport auger retains its ability to transport the ash out of the feed chamber, regardless of the nature of the ash. The cleaning wheel (14) is expediently provided with a number of radially projecting wings or knives (30), with which the cleaning effect in the combustion chamber is further increased. The increased cleaning effect is especially required in cases where the nature of the ash leads to solid ash accumulations in the boiler chamber. In a particularly preferred embodiment, the cleaning wheel is fixedly mounted on a vertical, rotatable shaft (15). This shaft, which is driven with the round cleaning wheel, is used to drive a specially designed ash scraper (16) mounted in immediate connection to the hearth (4) for processing and scraping of accumulated and / or burnt ash particles over and around the hearth. The ash scraper is in shape and layout adapted to the hearth in the stoker boiler in question.
Description
DK 177030 B1DK 177030 B1
Den foreliggende opfindelse angår en stokerkedel med askeudtager, og nærmere bestemt af den i indledningen til krav 1 anførte art.The present invention relates to a stoker boiler with ash dispenser, and more particularly to the kind set forth in the preamble of claim 1.
Stokerkedler af den her omhandlede type kendes eksempelvis fra beskrivelserne til 5 WO 8402385, DE 19828767 og US 5269233. Disse patent- og brugsmodelskrifter angår alle stokerkedler med askeopsamling i bunden af kedlens fyrkammer, og med forskellige anordninger til fjernelse af asken fra fyrkammeret. Anordningerne består i hovedsagen af en horisontal transportsnegl, der er indbygget i bunden af fyrkammeret, og ved hvis hjælp asken transporteres ud fra fyrkammeret til opsamling udenfor stokerkedlen.Stove boilers of this type are known, for example, from the descriptions of WO 8402385, DE 19828767 and US 5269233. These patent and utility model documents relate to all stove boilers having ash collection at the bottom of the boiler boiler, and with various devices for removing the ash from the boiler room. The devices consist essentially of a horizontal conveyor auger built into the bottom of the firing chamber and by means of which the ashes are transported from the firing chamber for collection outside the boiler.
1010
Et sådant askeudtagersystem fungerer rimelig pålideligt så længe asken er porøs og pulveragtig. Imidlertid vil mange af de brændselstyper, man i dag benytter i stokerkedler, eksempelvis kom, oliekagemix, roeffø, rapsafrensning, etc, forbrænde under dannelse af en aske, som er mere eller mindre fast eller klæbrig, dvs som danner sammenhængende 15 klumper eller ’’kager”. Aske af denne type samler sig ofte omkring og over herden, og give anledning til, at ilden kvæles hvis der ikke gribes ind i tide, dvs renses omkring herden.Such ash removal system works reasonably reliably as long as the ash is porous and powdery. However, many of the fuel types used today in boiler boilers, for example, cereals, oilcake mix, beet roe, rapeseed, etc, will burn to form an ash which is more or less solid or sticky, ie forming coherent lumps or ''. cakes". Ashes of this type often accumulate around and above the hearth, causing the fire to suffocate if not intervened in time, that is, to be cleaned around the hearth.
Endvidere vil en klæbende og/eller klumpende aske ofte bevirke, at transportsneglen i 20 bunden af fyrkammeret ’’pakker til” i aske, hvorved sneglens transportvirkning ophører.Furthermore, an adhesive and / or lumpy ash will often cause the transport auger in the bottom of the boiler to "pack" into ash, thereby terminating the transport effect of the auger.
Dette resulterer i, at fyrkammeret efterhånden fyldes op med aske, som til sidst vil kvæle ilden. I praksis er det derfor nødvendigt at rense ud i fyrkammeret dagligt, hvis man vil undgå driftsforstyrrelser. Det daglige rensearbejde er omstændeligt, ubehageligt og usundt.This results in the fire chamber eventually filling up with ash, which will eventually suffocate the fire. In practice, it is therefore necessary to clean out the boiler room daily if you want to avoid operational disruptions. The daily cleaning work is cumbersome, unpleasant and unhealthy.
2525
Til rensning af selve transportsneglen for vedhæftet aske kendes forskellige former for renseanordninger. En ren seanordning kan eksempelvis bestå af et rensehjul med form som en cirkulær skive, der er forsynet med fortanding langs periferien. Fortandingen kan eventuelt bestå af et antal radiært udragende vinger eller skrabeorganer. Rensehjulet er 30 drejeligt lejret omkring en lodret akse, der er sideforskudt i forhold til transportsneglens centerakse. Rensehjulet er anbragt således i forhold til transportsneglen, at hjulets fortanding er i indgreb med sneglens vindinger. Under sneglens rotation vil indgrebet bevirke, at rensehjulet sættes i roterende bevægelse, hvorunder fortandingen bevæger sig skrabende langs sneglevindingeme. På denne måde opnår man den tilsigtede rensende 35 effekt. Renseindretninger af den omhandlede type til rensning af en transportsnegl under dennes rotation kendes eksempelvis fra følgende patent- og brugsmodelskrifter: DE 2504574, DE 9115174, GB 2265922 og US 1694228.Various types of cleaning devices are known for cleaning the transport auger for the attached ash. For example, a clean tendon may consist of a cleaning wheel having the shape of a circular disc provided with toothed teeth along the periphery. The tooth may optionally consist of a plurality of radially projecting blades or scraper means. The cleaning wheel is pivotally mounted about a vertical axis which is laterally displaced relative to the center axis of the transport auger. The cleaning wheel is arranged in relation to the transport auger so that the tooth's tooth engages with the auger turns. During the rotation of the auger, the engagement will cause the cleaning wheel to rotate in motion, during which the tooth moves scrapingly along the auger windings. In this way, the intended purifying effect is obtained. Cleaning devices of the type in question for cleaning a transport auger during its rotation are known, for example, from the following patent and utility model specifications: DE 2504574, DE 9115174, GB 2265922 and US 1694228.
Til grund for opfindelsen ligger den opgave at anvise en renseanordning, som ikke alene 40 holder transportsneglen fri for vedhæftet aske, men som samtidig bearbejder et område over og omkring herden på en sådan måde, at herden holdes fri for sammenpakket og fastbrændt aske. Dette opnås ifølge opfindelsen ved at indrette askeudtageren således som angivet i den kendetegnende del af krav 1.The object of the invention is to provide a cleaning device which not only keeps the transport screw free of attached ash, but which simultaneously processes an area above and around the hearth in such a way that the hearth is kept free of packed and burnt ashes. This is achieved according to the invention by arranging the ash dispenser as set forth in the characterizing part of claim 1.
45 Det nye ved opfindelsen består i, at det rensehjul, som indgår i renseanordningen for transportsneglen, er drejefast monteret på en lodret aksel, der er drejeligt lejret i et system af bærearme eller anden form for bærekonstruktion indbygget i fyrkammeret. Akslen er placeret med sin rotationsakse, dvs centeraksen, forskudt i forhold til centeraksen i DK 177030 B1 2 transportsneglen. Rensehjulet er med sin perifere fortanding på i og for sig kendt vis i indgreb med vindingerne i transportsneglen, og vil under transportsneglens rotation blive drevet rundt i en rotationsbevægelse med rotationsakse i akslens lodrette centerakse.The new feature of the invention is that the cleaning wheel included in the transport screw cleaning device is pivotally mounted on a vertical shaft rotatably mounted in a system of support arms or other type of support structure built into the firing chamber. The shaft is positioned with its axis of rotation, ie the center axis, displaced relative to the center axis of the DK 177030 B1 2 transport screw. The cleaning wheel, with its peripheral gearing, in a manner known per se, engages with the turns of the transport auger, and during the rotation of the conveyor auger will be driven around in a rotational movement with rotational axis in the vertical center axis of the axle.
Bevægelsen udnyttes via den lodrette aksel til at drive en askeafstryger, som er monteret 5 i umiddelbar tilslutning til herden. Askeafstrygeren er indretet til bearbejdning og afstrygning af ophobede og/eller fastbrændte askedannelser over og omkring herden.The movement is utilized via the vertical shaft to drive an ash stripper mounted 5 immediately adjacent to the hearth. The ash stripper is arranged for machining and stripping of accumulated and / or burnt ash formation over and around the hearth.
Rensehjulet er som anført anbragt med den perifere fortanding i indgreb med transportsneglens vindinger, og bevirker under sneglens rotation en tilsigtet renskrabning 10 af sneglevindingeme, samtidig med, at rensehjulets roterende bevægelse overføres til askeafstrygeren via den lodrette aksel. Den kombinerede anordning ifølge opfindelsen bestående af askeafstrygeren ved herden og rensehjulet i indgreb med transportsneglen sikrer, at asken i fyrkammeret til stadighed holdes tilpas løs, så asken ved egen kraft kan ' samle sig i og omkring transportsneglen i bunden af fyrkammeret. Samtidig sikrer 15 anordningen, at transportsneglen bevarer sin evne til at transportere asken ud af stokerkedlen, idet transportsneglen til stadighed renskrabes af rensehjulet, således at vedhæftet aske effektivt fjernes fra sneglevindingen.The cleaning wheel is, as indicated, arranged with the peripheral tooth in engagement with the turns of the conveyor screw, and during the rotation of the auger causes an intentional cleaning of the auger windings 10, at the same time as the rotary movement of the cleaning wheel is transmitted to the ash stripper via the vertical shaft. The combined device according to the invention, consisting of the ash stripper at the hearth and the cleaning wheel in engagement with the transport auger, ensures that the ash in the firing chamber is kept constantly loose so that the ash can collect in and around the transport auger at the bottom of the firing chamber. At the same time, the device ensures that the transport auger retains its ability to transport the ash out of the boiler, as the transport auger is constantly scraped by the cleaning wheel so that the attached ash is effectively removed from the auger winding.
Ofte er den horisontale transportsnegl sammenbygget med en lodret eller skråtstillet 20 anden transportsnegl placeret udenfor stokerkedlen. Denne anden transportsnegl afleverer da asken i en askecontainer eller et askemagasin placeret ved siden af stokerkedlen.Often, the horizontal transport auger is joined by a vertical or inclined 20 second conveyor auger located outside the boiler. This second transport auger then delivers the ashes in an ash container or ash tray located next to the boiler.
Kombineret med en passende styring og overvågning af de forskellige funktioner i stokerkedlen og askeudtagersystemet opnår man en fuldautomatisk løsning, hvor enhver form for manuel håndtering af asken er elimineret. Den beskrevne stokerkedel med 25 askeudtager udmærker sig ved at være enkel og pålidelig.Combined with appropriate control and monitoring of the various functions of the stoker boiler and the ash extractor system, a fully automatic solution is obtained, whereby all manual handling of the ash is eliminated. The described stoker boiler with 25 ash sticks is distinguished by being simple and reliable.
Formålstjenligt er rensehjulet forsynet med et antal radiært udragende vinger eller knive, der befinder sig i niveau over transportsneglen, dvs fri af denne. De udragende vinger eller knive bevirker under deres rotation sammen med rensehjulet en intensiv 30 bearbejdning af asken, hvorved denne ’’knuses” og pulveriseres. På denne måde bringes asken i en form, som gør den bedst mulig egnet til transport ud af fyrkammeret v hj af transportsneglen. Dvs at vingerne eller knivene bidrager til en forøgelse af renseeffekten i fyrkammeret. Den øgede renseeffekt er især påkrævet i tilfælde, hvor askens beskaffenhed medfører faste askeophobninger i fyrkammeret.Conveniently, the cleaning wheel is provided with a number of radially projecting blades or blades which are in level above the transport screw, ie free of this. The protruding wings or knives during their rotation together with the cleaning wheel intensify machining of the ash, thereby crushing and pulverizing it. In this way, the ash is brought into a form which makes it most suitable for transport out of the boiler room by the transport screw. That is, the wings or blades contribute to an increase in the cleaning effect in the firing chamber. The increased cleaning effect is especially required in cases where the nature of the ash causes solid ash accumulation in the firing chamber.
3535
Askeafstrygeren er tilpasset i form og størrelse til den pågældende herd i stokerkedlen. I kravene 3,4 og 5 er angivet forskellige eksempler på udførelsesformer specifikt tilpasset forskellige herdtyper. I alle tilfælde udfører den i hovedsagen ringformede askeafstryger en planetagtig bevægelse omkring herden under virkning af den drevne aksel og den på 40 akslen siddende krumtap. Bevægelsen bevirker, at den aske, som opbygger sig på og omkring herden, presses ud til siderne af askeafstrygeren, og på den måde løsnes. Den løsnede aske falder ned i bunden af fyrkammeret, hvor transportsneglen sikrer den videre transport ud af stokerkedlen.The ash stripper is adapted in shape and size to the particular hearth in the stoker boiler. In the claims 3, 4 and 5, various examples of embodiments are specifically adapted to different cure types. In all cases, the generally annular ash stripper performs a planetary movement around the hearth under the action of the driven shaft and the crankshaft seated on the shaft. The movement causes the ash that builds up on and around the hearth to be squeezed out to the sides of the ash stripper and thus loosened. The loosened ash falls to the bottom of the firing chamber, where the transport screw secures the further transport out of the boiler.
45 Opfindelsen skal forklares nærmere i det følgende i forbindelse med tegningen, hvor fig. 1 viser et stokerkedel udstyret med en askeudtager ifølge opfindelsen, vist skematisk i sidebillede, delvis i snit, DK 177030 B1 3 fig, 2 samme stokerkedel set forfra, fig. 3 et forstørret udsnit af selve askeudtageren vist i sidebillede, fig. 4 samme set ovenfra, fig. 5 askeudtagerens herdafstryger i en første udførelsesform, vist særskilt ovenfra, og 5 fig. 6 en herdafstryger i en anden udførelsesform, ligeledes vist ovenfra.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 shows a stoker boiler equipped with an ash dispenser according to the invention, shown schematically in side view, partly in section, FIG. 3 is an enlarged sectional view of the ash dispenser itself shown in side view; FIG. 4 is a top plan view, FIG. 5 shows the ash stripper of the ash stripper in a first embodiment, shown separately from above; and FIG. 6 shows a hearth stripper in another embodiment, also shown from above.
I den på tegningens fig. 1 og 2 viste udførelsesform består stokerkedlen i det væsentlige af en kedel 1 med fyrkammer 2, en stokersnegl 3, en herd 4, et brændselsmagasin 5, og en indblæsningskanal 6 for primær forbrændingsluft. I bunden 7 af fyrkammeret 2, hvor 10 asken opsamles, er indsat en askeudtager 8. Denne er sammensat af en første snegletransportør 9, som udenfor kedlen 1 er koblet sammen med en anden snegletransportør 10. Den første snegletransportør 9 er vandret, og strækker sig fra fyrkammerets 2 bundzone 7 et stykke ud udenfor kedlen 1. Udenfor kedlen slutter snegletransportøren 7 sig til den anden snegletransportør 10, således at asken kan 15 transporteres videre i denne. Den anden snegletransportør 10 er anbragt i en vinkel på ca 45 grader. Umiddelbart under snegletransportørens 10 afleveringsstuds 11 er placeret en askeopsamlingscontainer 12.In the FIG. 1 and 2, the stoker boiler consists essentially of a boiler 1 with firing chamber 2, a stoker auger 3, a hearth 4, a fuel magazine 5, and a supply duct 6 for primary combustion air. At the bottom 7 of the firing chamber 2, where the ash is collected, an ash extractor 8 is inserted. This is composed of a first auger conveyor 9 which is connected outside the boiler 1 with a second auger conveyor 10. The first auger conveyor 9 is horizontal and extends. from the bottom zone 7 of the firing chamber 2 a distance outside the boiler 1. Outside the boiler, the auger conveyor 7 joins the second auger conveyor 10 so that the ash 15 can be transported further therein. The second auger 10 is disposed at an angle of about 45 degrees. Immediately below the snail conveyor 10 delivery stud 11 is placed an ash collection container 12.
I den viste udførelsesform er askeudtageren 8 forsynet med en renseanordning 13, der i 20 hovedsagen består af et cirkulært rensehjul 14 med tilhørende aksel 15 og askeafstryger 16 anbragt ved herden 4, se fig. 3 og 4. Rensehjulet 14 har klokkeform, og er fortandet langs den cirkulære, nedadvendende kant, som er dannet af rensehjulets perifere skørt 17. Fortandingen, som er angivet med 18, er i indgreb med sneglevindingeme 9a i den første snegletransportør 9. Rensehjulet 14 er fast monteret på akslen 15, hvilken er anbragt i 25 lodret stilling og forskudt i forhold til centeraksen 9b i snegletransportøren 9, således at rensehjulet nærmest tangerer snegletransportøren, se fig. 4. Akslen 15 er lejret i et sæt lejebøsninger 19, som bæres af en i fyrkammeret 2 indsat bæreramme 20. Indgrebet mellem sneglevindingeme 9a og rensehjulsfortandingen betyder, at rensehjulet drives med rundt i en roterende bevægelse, når snegletransportøren 9 roterer, dvs når 30 askeudtagersystemet aktiveres.In the embodiment shown, the ash dispenser 8 is provided with a cleaning device 13, which in the main case consists of a circular cleaning wheel 14 with associated shaft 15 and ash scraper 16 arranged at the hearth 4, see fig. 3 and 4. The cleaning wheel 14 has a bell shape and is toothed along the circular downward edge formed by the peripheral skirt of the cleaning wheel 17. The toothing indicated by 18 is in engagement with the snail windings 9a in the first snail conveyor 9. The cleaning wheel 14 is fixedly mounted on the shaft 15, which is arranged in a vertical position and displaced with respect to the center axis 9b of the auger conveyor 9, so that the cleaning wheel almost tangles the auger conveyor, see fig. 4. The shaft 15 is housed in a set of bearing bushes 19 carried by a support frame 20 inserted in the firing chamber 2. activated.
I den øverste ende af akslen 15 er denne indrettet med en krumtap 21, som med en opadrettet lejetap 22 griber ind i en lejeboring 23 i askeafstrygeren 16. Selve askeafstryger 16 har form som en cirkulær ring 16a, der er forsynet med en radiært 35 udadrettet arm 16b. Lejeboringen 23 befinder sig i armen. Askeafstrygeren, som er fremstillet af varmefast stål, er lejret frit forskydeligt i eget plan oven på herden 4.At the upper end of the shaft 15, this is provided with a crank 21 which, with an upwardly extending bearing pin 22, engages a bearing bore 23 in the ash stripper 16. The ash stripper 16 is in the form of a circular ring 16a, which is provided with a radially 35 outwardly arm 16b. The bearing bore 23 is in the arm. The ash stripper, which is made of heat-resistant steel, is stored freely displaceable in its own plane on top of the hearth 4.
Foruden den nævnte lejeboring 23 er armen forsynet med en anden lejeboring 24 anbragt i afstand fra den første lejeboring. Denne anden lejeboring 24 tjener til indgreb for en anden styretap 25, der er udformet i tilslutning til en frit roterbar styreaksel 26, i hvis 40 øverste ende der er udformet en krumtap 27, hvorpå styretappen 25 er monteret.In addition to said bearing bore 23, the arm is provided with a second bearing bore 24 spaced from the first bearing bore. This second bearing bore 24 serves to engage another guide pin 25, which is formed adjacent to a freely rotatable guide shaft 26, at the upper end of which 40 is a crank 27 on which the guide pin 25 is mounted.
Styreakslen 26 er anbragt i lodret stilling, dvs parallelt med rensehjulsakslen 15. Den anden lejeboring 24 kan eventuelt være udformet som en sideværts indstillelig lejedel (ikke vist), hvormed askeafstrygerens sideværts bevægelsesmønster kan justeres.The steering shaft 26 is positioned in a vertical position, i.e. parallel to the impeller shaft 15. The second bearing bore 24 may optionally be formed as a laterally adjustable bearing part (not shown), by which the lateral movement pattern of the ash stripper can be adjusted.
45 Styreakslen 26 og rensehjulsakslen 15 vil i forening med deres respektive krumtapmekanismer tvangsstyre askeafstrygeren i en cirklende parallelforskydning drevet af rensehjulet via rensehjulsakslen, se fig. 5. Den cirklende parallelforskydning bevirker, at askeophobninger og sammenbrændte askekager over og omkring herden DK 177030 B1 4 effektivt knuses og skubbes ud over kanten af herden, På den måde undgår man, at herden efterhånden stopper til i aske, og at Uden i herden som følge heraf’’kvæles”.45 The steering shaft 26 and the impeller shaft 15, in conjunction with their respective crankshaft mechanisms, force the ash scraper into a circular parallel displacement driven by the impeller via the impeller shaft, see FIG. 5. The circular parallel displacement causes the ash accumulation and coalesced ash cakes over and around the hearth to be effectively crushed and pushed beyond the edge of the hearth, thus preventing the hearth from eventually stopping in ashes, and that without the hearth as consequently '' suffocated ''.
Askeafstrygeren kan eksempelvis være 10 -15 mm høj, og den cirkulære ring 16a kan ifølge opfindelsen have en indvendig konusform med en konieitet på ca 60 vinkelgrader.For example, the ash stripper may be 10-15 mm high and the circular ring 16a may according to the invention have an inner cone shape with a conicity of about 60 angular degrees.
5 Askeafstrygereren vil på denne måde bevirke, at herdens effektive volumen øges, og at glødemængden derved øges med en forøget forbrændingstemperatur til følge. Den forøgede forbrændingstemperatur indebærer en forbedret og mere ren forbrænding.In this way, the ash stripper will increase the effective volume of the hearth and thereby increase the amount of incandescent resulting in an increased combustion temperature. The increased combustion temperature implies an improved and cleaner combustion.
I fig. 6 er askeafstrygeren vist i en lidt anden udførelsesform, hvor den anden 10 krumtapmekanisme 27 er erstattet af en fastsiddende tap 28, og hvor det tilhørende styrehul i askeafstrygeren 16 er et aflangt hul 29. Askeafstrygerens bevægelsesmønster er antydet med punkteret streg. Udførelsesformen er i øvrigt umiddelbart forståelig ud fra figuren.In FIG. 6, the ash stripper is shown in a slightly different embodiment where the second crank mechanism 27 is replaced by a fixed pin 28 and the associated guide hole in the ash stripper 16 is an elongated hole 29. The pattern of movement of the ash stripper is indicated by a dashed line. Incidentally, the embodiment is immediately understandable from the figure.
15 For at øge rensehjulets renseeffekt og evne til sønderdeling af askeklumper opsamlet i bunden 7 af fyrkammeret 2 er rensehjulet forsynet med et antal radiære arme 30, der strækker sig ud fra rensehjulets nav 31, se fig 3 og 4. Rensehjulet selv bevirker en gavnlig renskrabning af snegletransportørens 9 sneglevindinger, så man undgår, at asken efterhånden klæber til transportøren og ved successiv tilstopning af denne fører til nedsat 20 eller helt svigtende snegleeffekt og dermed transportevne. I forbindelse med de radiære arme 30 er der i fyrkammeret indsat en fastmonteret tværbom 30a, som i kombination med armene 30 bevirker en effektiv knusning af større askeklumper. Tværbommen 30a, som er indsat i vandret stilling umiddelbart over armenes 30 bevægelsesplan, fremgår af fig. 1 og 2. De forskellige tiltag til knusning af asken og renholdelse af 25 snegletransportøren 9 bevirker, at askeudtageren kan fungere med større effektivitet og dermed i kortere sekvenser end ellers, således at der spares elektrisk effekt til driften. For en mindre stokerkedel har besparelsen i praksis vist sig at være af størrelsesordenen 150 kWh årligt.15 In order to increase the cleaning power of the cleaning wheel and its ability to disintegrate ash lumps collected at the bottom 7 of the firing chamber 2, the cleaning wheel is provided with a number of radial arms 30 extending from the hub 31 of the cleaning wheel, see Figs. 3 and 4. The cleaning wheel itself provides a beneficial scraping of the snail conveyor 9 screw turns to avoid the ashes eventually adhering to the conveyor and by successively clogging it leads to reduced 20 or completely failing snail effect and thus carrying capacity. In connection with the radial arms 30, a fixed-mounted cross bar 30a is inserted in the firing chamber, which in combination with the arms 30 causes an effective crushing of larger ash chunks. The transverse boom 30a, which is inserted in a horizontal position immediately above the plane of movement of the arms 30, is shown in FIG. 1 and 2. The various ashes for crushing the ashes and cleaning the auger conveyor 9 allow the ash extractor to operate with greater efficiency and thus in shorter sequences than otherwise, thus saving electrical power for operation. In practice, for a smaller boiler, the savings have proved to be of the order of 150 kWh annually.
30 Opfindelsen er ikke begrænset til den på tegningen viste og ovenfor beskrevne udførelsesform. Andre materialekombinationer, andre detailudformninger og andre konstruktive løsninger for aske udtagerens enkelte bestanddele og tilbehørsdele er tænkelig indenfor rammerne af denne opfindelse, ligesom anvendelsen af askeudtageren kan tænkes udvidet til andre områder end det anførte. Det bemærkes, at selve rensehjulet 35 kan have mange andre udformninger end det på tegningen viste og ovenfor beskrevne.The invention is not limited to the embodiment shown in the drawing and described above. Other material combinations, other retail designs, and other constructive solutions for the ash extractor's individual components and accessories are conceivable within the scope of this invention, and the use of the ash extractor may be extended to areas other than those listed. It should be noted that the cleaning wheel 35 itself can have many other designs than that shown in the drawing and described above.
Eksempelvis kan rensehjulet jfr. krav 1 være en simpel cirkulær skive forsynet med radiært udadragende eller nedadragende tappe, der er påsvejset skiven, og som er i indgreb med snegletransportørens vindinger.For example, the cleaning wheel, cf. Claim 1 is a simple circular disc provided with radially outward or downwardly extending pins welded to the disc and which engage the screws of the auger conveyor.
40 4540 45
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA200800002A DK177030B1 (en) | 2008-01-02 | 2008-01-02 | Stoker boiler with ash extractor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK200800002 | 2008-01-02 | ||
| DKPA200800002A DK177030B1 (en) | 2008-01-02 | 2008-01-02 | Stoker boiler with ash extractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK200800002A DK200800002A (en) | 2009-07-03 |
| DK177030B1 true DK177030B1 (en) | 2011-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DKPA200800002A DK177030B1 (en) | 2008-01-02 | 2008-01-02 | Stoker boiler with ash extractor |
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| Country | Link |
|---|---|
| DK (1) | DK177030B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10315856B2 (en) | 2017-08-24 | 2019-06-11 | Karl Schnell Gmbh & Co. Kg | Cleaning device and method for cleaning a screw conveyor |
-
2008
- 2008-01-02 DK DKPA200800002A patent/DK177030B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10315856B2 (en) | 2017-08-24 | 2019-06-11 | Karl Schnell Gmbh & Co. Kg | Cleaning device and method for cleaning a screw conveyor |
Also Published As
| Publication number | Publication date |
|---|---|
| DK200800002A (en) | 2009-07-03 |
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