NO176455B - grate furnace - Google Patents

grate furnace Download PDF

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Publication number
NO176455B
NO176455B NO925023A NO925023A NO176455B NO 176455 B NO176455 B NO 176455B NO 925023 A NO925023 A NO 925023A NO 925023 A NO925023 A NO 925023A NO 176455 B NO176455 B NO 176455B
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NO
Norway
Prior art keywords
air
primary
grate
chamber
fuel
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Application number
NO925023A
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Norwegian (no)
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NO925023A (en
NO176455B1 (en
NO925023D0 (en
NO176455C (en
Inventor
Helge Rosvold
Erling A Oesterboe
Original Assignee
Sinvent As
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sinvent As filed Critical Sinvent As
Priority to NO19925023A priority Critical patent/NO176455B1/en
Publication of NO925023D0 publication Critical patent/NO925023D0/en
Priority to DE69319741T priority patent/DE69319741T2/en
Priority to EP94904017A priority patent/EP0676023B1/en
Priority to AU58238/94A priority patent/AU5823894A/en
Priority to AT94904017T priority patent/ATE168459T1/en
Priority to DK94904017T priority patent/DK0676023T3/en
Priority to PCT/NO1993/000191 priority patent/WO1994015148A1/en
Publication of NO925023A publication Critical patent/NO925023A/en
Publication of NO176455B publication Critical patent/NO176455B/en
Publication of NO176455C publication Critical patent/NO176455C/en
Publication of NO176455B1 publication Critical patent/NO176455B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L1/00—Passages or apertures for delivering primary air for combustion 
    • F23L1/02—Passages or apertures for delivering primary air for combustion  by discharging the air below the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/06—Baffles or deflectors for air or combustion products; Flame shields in fire-boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2900/00—Special features of combustion grates
    • F23H2900/03021—Liquid cooled grates

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

A grate furnace for different kind of waste materials such as biomass, mud, and derived fuel, comprising a primary combustion chamber (2) and a secondary combustion chamber (3). A cooled grate (6) for fuel is arranged in the lower edge of the primary combustion chamber (2), and below the grate is provided air supply (5), arranged in a plurality of zones. Furthermore there are provided nozzles (15, 16) for the supply of air to the secondary chamber (3). The primary and the secondary combustion chambers (2, 3) are at least partly separated by a separation plate (10). The zones (5) are individually controllable and are supplied with air and recirculated flue gas, preferably with a high temperature. At least one of the nozzles (15) is adjustable and directed towards the primary air chamber (2), in order to ensure an annealing on the grate (6).

Description

Foreliggende oppfinnelse angår en ristovn for alternativt brensel, som angitt i den innledende delen av patentkrav 1. The present invention relates to a grate stove for alternative fuel, as stated in the introductory part of patent claim 1.

Ved utsortering av ikke-brennbare elementer fra hushold-ningsavfall o.l., fås det som kalles for "foredlet alternativt brensel", FAB. Dette kan blandes med bark og flis for å få en bedre brennverdi. Dette brenslet brennes i spesille ovner, for å ta ut mest mulig energi, og slik at brenslet forurenser minst mulig. Slike ovner bør også kunne ta annet fast brensel, så som alle former for biomasse, slam, samt visse former for spesialavfall. By sorting out non-combustible elements from household waste etc., what is called "refined alternative fuel", FAB, is obtained. This can be mixed with bark and chips to get a better calorific value. This fuel is burned in special furnaces, in order to extract the most energy possible, and so that the fuel pollutes as little as possible. Such furnaces should also be able to take other solid fuel, such as all forms of biomass, sludge, as well as certain forms of special waste.

I prinsippet fungerer en ovn for brenning av FAB på den måten at brenslet tilføres på ei rist som er plassert over et primærluftkammer, som ofte er delt i seksjoner. Selve forbrenningsovnen er delt i et primærkammer og et sekundærkammer, der brenslet forbrennes i to prosesser. In principle, a furnace for burning FAB works in such a way that the fuel is fed onto a grate that is placed above a primary air chamber, which is often divided into sections. The incinerator itself is divided into a primary chamber and a secondary chamber, where the fuel is burned in two processes.

Ulempler ved kjente ristovner av omtalte slag er at det er vanskelig å oppnå en optimal forbrenning, både med hensyn på utnyttelse av energi og reduksjon av forurensende utslipp. Dette skyldes vesentlig at ovnene er lite fleksible, og ikke omfatter styringsmuligheter for tilpasning til brensel av forskjellig konsistens og innhold. Disadvantages of known grate stoves of the type mentioned are that it is difficult to achieve optimal combustion, both with regard to utilization of energy and reduction of polluting emissions. This is mainly due to the fact that the stoves are not very flexible, and do not include control options for adaptation to fuel of different consistency and content.

Det er derfor et formål med foreliggende oppfinnelse å framskaffe en ristovn for foredlet alternativt brensel som kan tilpasses den type brensel som forefinnes for å oppnå en mest mulig optimal forbrenningsprosess med hensyn på energi-utnyttelse og reduksjon av forurensende utslipp. It is therefore an aim of the present invention to provide a grate stove for refined alternative fuel which can be adapted to the type of fuel available in order to achieve the most optimal combustion process with regard to energy utilization and reduction of polluting emissions.

Oppfinnelsens formål oppnås med en anordning med trekk som angitt i den karakteriserende delen av patentkrav 1. Ytterligere trekk framgår av de tilhørende uselvstendige krav. The purpose of the invention is achieved with a device with features as stated in the characterizing part of patent claim 1. Further features appear from the associated independent claims.

I det følgende skal oppfinnelsen beskrives nærmere ved hjelp av eksempel på utførelse, og med referanse til vedlagte tegninger, der In what follows, the invention will be described in more detail by means of examples of execution, and with reference to the attached drawings, there

fig. 1 viser en prinsippskisse for en ristovn i samsvar med foreliggende oppfinnelse, og fig. 1 shows a schematic diagram of a griddle oven in accordance with the present invention, and

fig. 2 viser mer i detalj en ristovn i samsvar med foreliggende oppfinnelse. fig. 2 shows in more detail a grate oven in accordance with the present invention.

Ved først å referere til fig. 1 vises en ristovn generelt benevnt 1 som er delt i et primærkammer 2 og et sekundærkammer 3. Primær- og sekundærkamrene 2, 3 er beskyttet av omkringliggende isolasjon 4. Under primærkammeret 2 er anordnet et primærluftkammer 5 som er delt i et antall seksjoner for fleksibel tilførsel av primærluft og resirkulert røykgass. Over primærluftkammeret 5 er anordnet ei rist 6 tilpasset energirikt brensel (f.eks. FAB). Rista 6 er avkjølt, f.eks. vannavkjølt. Rista er utformet slik at den gir et høyt trykkfall. Over rista 6 er anordnet en stangmater 7 som tilfører brensel til rista 6. En giljotin 8 regulerer brenselsmengden som føres fram på stangmateren 7. Giljotinen 8 sikrer en god reguleringsmulighet for brensels-høyden over rista 6, og en stabil og jevn brenselfordeling over hele ristas 6 bredde. Brenselet tilføres fra en ikke vist brenselbeholdning ved hjelp av en mateskrue 9 til et brenselmagasin 18 i området ut for giljotinen 8. Brenselmagasinet 18 er fortrinnsvis isolert/kjølt slik at det ikke oppstår avgassing fra brenslet. Referring first to FIG. 1 shows a grate furnace generally designated 1 which is divided into a primary chamber 2 and a secondary chamber 3. The primary and secondary chambers 2, 3 are protected by surrounding insulation 4. Below the primary chamber 2 is arranged a primary air chamber 5 which is divided into a number of sections for flexible supply of primary air and recycled flue gas. Above the primary air chamber 5 is arranged a grate 6 adapted to energy-rich fuel (e.g. FAB). Rista 6 is cooled, e.g. water cooled. The grate is designed so that it produces a high pressure drop. A rod feeder 7 is arranged above the grate 6, which supplies fuel to the grate 6. A guillotine 8 regulates the amount of fuel that is fed onto the rod feeder 7. The guillotine 8 ensures a good regulation option for the height of the fuel above the grate 6, and a stable and even distribution of fuel over the whole grate 6 width. The fuel is supplied from a fuel storage (not shown) by means of a feed screw 9 to a fuel magazine 18 in the area outside the guillotine 8. The fuel magazine 18 is preferably insulated/cooled so that no degassing from the fuel occurs.

Primærkammeret 2 og sekundærkammeret 3 er delt ved ei deleplate 10. Deleplata 10 er bevegelig både i høyde og lengderetning for å kunne variere volum av de to kamrene 2, 3 og videre å dirigere gass-strømmen i ønsket retning. Ved å forskyve deleplata 10 i fram-, hhv. bakoverretning vil strøm-ningsbildet påvirkes, og det kan bestemmes om røykgassen skal forlate primærkammeret 2 i forkant, bakkant eller begge steder. På deleplata 10 er det fortrinnsvis anordnet bafler 11 for å sikre god blanding og turbulens i sekundærkammeret 3. Også disse er bevegbare til ønsket posisjon og kan eventuelt fjernes eller skiftes ut med bafler av forskjellig geometri. Også i toppveggen er anordnet en baffel 12. The primary chamber 2 and the secondary chamber 3 are divided by a partition plate 10. The partition plate 10 is movable both in height and length in order to be able to vary the volume of the two chambers 2, 3 and further to direct the gas flow in the desired direction. By displacing the dividing plate 10 in the forward, resp. backwards, the flow pattern will be affected, and it can be decided whether the flue gas should leave the primary chamber 2 at the leading edge, trailing edge or both places. Baffles 11 are preferably arranged on the dividing plate 10 to ensure good mixing and turbulence in the secondary chamber 3. These are also movable to the desired position and can possibly be removed or replaced with baffles of different geometry. A baffle 12 is also arranged in the top wall.

En"askebeholder 13 er anordnet utenfor og nedenfor rista 6 på motsatt side av innmatingsområdet. I toppveggen av forbrenningskammeret er anordnet minst ett røykgassuttak 14. An ash container 13 is arranged outside and below the grate 6 on the opposite side of the feed area. At least one flue gas outlet 14 is arranged in the top wall of the combustion chamber.

I forbrenningskammerets vegg 4 er anordnet dyser for sekundærluft 16a. Videre er fortrinnsvis anordnet ytterligere' dyser for tertiærluft ved området 16b. Nozzles for secondary air 16a are arranged in the wall 4 of the combustion chamber. Further, further nozzles for tertiary air are preferably arranged in the area 16b.

Ristovnen 1 fungerer ved at en i primærkammeret 2 har tørking, avgassing og pyrolyse av brensel, samt utbrenning av karbonrester. I sekundærkammeret 3 vil man ha utbrenning av brennbare gasser. Temperaturen i primærkammeret 2 er fortrinnsvis i området 500-700 °C, mens sekundærkammeret 3 holder en temperatur på ca. 1000 °C. Temperaturen i primærkammeret 2 settes for å hindre avgassing av tungmetaller, og dannelse av slagg. Temperaturen i sekundærkammeret 3 skal sikre god utbrenning av organiske og klororganiske forbind-elser. Lave lufthastigheter i primærkammeret skal begrense transport av støvpartikler. I tillegg til regulering av temperaturen bestemmes dette av at lufttilgangen i primærkammeret begrenses. Dette gjøres ved at de flere sonene i primærluftkammeret 5 kan reguleres individuelt og fordelingen av luft kan gjøres fleksibelt. Her blir også resirkulert røykgass anvendt. Resirkulert røykgass tas ut så tidlig i systemet at den har en høy temperatur, og dermed hjelper forbrenningsprosessen i primærkammeret 2. Mellom sonene i primærluft-tilførselen 5 kan kjølingen skje individuelt, bl.a. for å unngå kjøling i områder der temperaturen er under kontroll. Ved å styre temperaturkontrollen gjennom lufttilgang i primærkammeret er det mulig å holde seg under de kritiske temperaturer med hensyn på slagging. The grate stove 1 works by drying, degassing and pyrolysis of fuel in the primary chamber 2, as well as burning off carbon residues. In the secondary chamber 3, combustible gases will burn out. The temperature in the primary chamber 2 is preferably in the range 500-700 °C, while the secondary chamber 3 maintains a temperature of approx. 1000 °C. The temperature in the primary chamber 2 is set to prevent degassing of heavy metals and the formation of slag. The temperature in the secondary chamber 3 must ensure good combustion of organic and organochlorine compounds. Low air speeds in the primary chamber should limit the transport of dust particles. In addition to regulating the temperature, this is determined by restricting the air access in the primary chamber. This is done by allowing the several zones in the primary air chamber 5 to be regulated individually and the distribution of air can be made flexible. Recycled flue gas is also used here. Recycled flue gas is taken out so early in the system that it has a high temperature, thus helping the combustion process in the primary chamber 2. Between the zones in the primary air supply 5, cooling can take place individually, i.a. to avoid cooling in areas where the temperature is under control. By managing the temperature control through air access in the primary chamber, it is possible to stay below the critical temperatures with regard to slagging.

I enden av rista 6 sikres utbrenning av fast karbon gjennom en kombinasjon av kontrollert gløding, økt motstand i enden av rista og skjerming av asken fra det øvrige brennkammer. Gløding oppnås gjennom å styre luft og resirkulert røykgass i kombinasjon med røykgass og sekundærluft gjennom ei dyse 15 som ligger i brenselskammerveggen, på en slik måte at den skjermer sonen for utbrenning av asken fra det øvrige brennkammer. Denne lufta skal samtidig sikre et spenningsbilde der varme fra utglødningssonen transporteres til innmatingssonen og sikrer en jevn pyrolyseaktivitet. Dimensjonering og geometri for dysene 15 må tilpasses den resirkulerte gassmengde og det strømningsbilde man ønsker å oppnå i primærluftkammeret 2. Uttak av røykgass ved røygass-uttakene 14 må kunne varieres avhengig av hvilket strømnings-bilde som er ønskelig i sekundærkammeret. For å sikre fleksi-bilitet i strømningsbildet legges fortrinnsvis inn røykgass-uttak både i forkant og bakkant av sekundærkammeret 3. Sekundærluftdysene 16a, 16b er dimensjonert etter aktuelle luftmengder og det strømningsbilde som ønskes i sekundærkammeret 3. Sekundær luftdysene 16a, 16b er utformet slik at den enkelt kan variere utløpshastighet og utløpsvinkel på lufta. De viste plassering av sekundærluftdyser er ment som et eksempel. Dysene 16a i veggene av sekundærluftkammeret dimensjoneres ut fra sekundærkammerets volum for å gi en hastighet og retning som gir en god blanding. Luftforvarm-ingen 17a i veggen mellom forbrenningskammeret 2, 3 og brenselsmagasinet 18 gir i tillegg til luftforvarming isolasjon mot brenselsmagasinet og hindrer høye temperaturer i brensellagret. Varmeuttaket må imidlertid ikke være så stort at temperaturforholdet i primær- og sekundærkammeret 2, 3 påvirkes i negativ retning. At the end of the grate 6, combustion of solid carbon is ensured through a combination of controlled annealing, increased resistance at the end of the grate and shielding of the ash from the rest of the combustion chamber. Glowing is achieved by directing air and recycled flue gas in combination with flue gas and secondary air through a nozzle 15 located in the fuel chamber wall, in such a way that it shields the zone for burning out the ash from the rest of the combustion chamber. This air must also ensure a tension pattern where heat from the annealing zone is transported to the feed zone and ensures uniform pyrolysis activity. Dimensioning and geometry for the nozzles 15 must be adapted to the recycled gas quantity and the flow pattern one wishes to achieve in the primary air chamber 2. The extraction of flue gas at the flue gas outlets 14 must be able to be varied depending on which flow pattern is desired in the secondary chamber. In order to ensure flexibility in the flow pattern, flue gas outlets are preferably inserted both at the front and rear edge of the secondary chamber 3. The secondary air nozzles 16a, 16b are sized according to the relevant air quantities and the flow pattern desired in the secondary chamber 3. The secondary air nozzles 16a, 16b are designed so that it can easily vary the outlet speed and outlet angle of the air. The shown placement of secondary air nozzles is intended as an example. The nozzles 16a in the walls of the secondary air chamber are dimensioned based on the volume of the secondary chamber to give a speed and direction that gives a good mixture. The air preheater 17a in the wall between the combustion chamber 2, 3 and the fuel store 18 provides, in addition to air preheating, insulation against the fuel store and prevents high temperatures in the fuel store. However, the heat output must not be so large that the temperature ratio in the primary and secondary chambers 2, 3 is affected in a negative direction.

I fig. 2 er vist et mer detaljert eksempel på en utførelse av foreliggende oppfinnelse. I grove trekk er oppbygging og funksjonsmåte lik det som ovenfor er beskrevet i forbindelse med fig. 1. Forbrenningskammeret er delt i et primærkammer 2 og et sekundærkammer 3 som er omgitt av en isolert stålmantel 4. De to kammerene 2, 3 er delt av den horisontal deleplata 10, som ved sine ender går over i vertikale bafler 11. Turbulens i sekundærkammeret sikres ved vertikal baffel 12. In fig. 2 shows a more detailed example of an embodiment of the present invention. Broadly speaking, the structure and function are similar to what is described above in connection with fig. 1. The combustion chamber is divided into a primary chamber 2 and a secondary chamber 3 which is surrounded by an insulated steel jacket 4. The two chambers 2, 3 are divided by the horizontal dividing plate 10, which at its ends transitions into vertical baffles 11. Turbulence in the secondary chamber secured by vertical baffle 12.

Under rista 6 er anordnet fem primærluftbokser 5 for fordeling av primærluft. Disse har tilførselrør 21 for resirkulert røykgass, og tilførselsrør 22 for primærluft som er oppvarmet ved et varmeelement 25. Five primary air boxes 5 are arranged under the grate 6 for distribution of primary air. These have supply pipe 21 for recycled flue gas, and supply pipe 22 for primary air which is heated by a heating element 25.

Giljotinen 8 justerer høyden på brenselet som føres inn på rista 6. Brenselet kommer fra cellemateren 9 som samtidig stenger for luft til brenselmagasinet 18 og sørger for tetting i forbindelse med innmating av brensel. Før asken går fra rista 6 til askebeholderen 13, foretas utbrenning og utgløding vha. tilpasset lufttilførsel og motstand i askeutbrenneren 19. The guillotine 8 adjusts the height of the fuel that is fed onto the grate 6. The fuel comes from the cell feeder 9, which at the same time closes off air to the fuel magazine 18 and ensures sealing in connection with feeding in fuel. Before the ash goes from the grate 6 to the ash container 13, burning and annealing is carried out using adapted air supply and resistance in the ash incinerator 19.

Tilførsel av sekundærluft skjer gjennom dysene 15, 16a og 16c, og tertiærluft tilføres gjennom dysene 16b. Secondary air is supplied through nozzles 15, 16a and 16c, and tertiary air is supplied through nozzles 16b.

Rista 6 kjøles ved tilførsel av kjølemedium gjennom tilførselsrørene 20. På røykgasskanalen 14 er anordnet et kjøleelement 23 som kjøler røykgassen før utslipp gjennom pipa 24. Videre er det på fig. 2 tegnet inn se-glass 17 gjennom hvilke forbrenningsprosessen kan observeres. The grate 6 is cooled by the supply of cooling medium through the supply pipes 20. A cooling element 23 is arranged on the flue gas channel 14 which cools the flue gas before discharge through the pipe 24. Furthermore, in fig. 2 drew in sight glass 17 through which the combustion process can be observed.

Claims (6)

1. Ristovn for forskjellig type brensel, såsom biomasse, slam og foredlet avfall; omfattende et primært forbrenningskammer (2) og et sekundært forbrenningskammer (3), der det i underkant av det primære forbrenningskammeret (2) er anordnet ei kjølt rist (6) for brensel, og det under rista er anordnet lufttilførsel (5) som er inndelt i et visst antall soner, og det videre er anordnet dyser (15, 16) for tilførsel av luft til sekundærkammeret (3), karakterisert ved at det primære og det sekundære forbrenningskammeret (2, 3) i det minste delvis er skilt ved ei deleplate (10), og at sonene (5) er individuelt styrbare og har tilførsel av luft og resirkulert røykgass, fortrinnsvis med høy temperatur, og at minst en av dysene (15) er regulerbar og rettet mot primær luf tkammeret (2) for å sikre en utglødning på rista (6).1. Grate stove for different types of fuel, such as biomass, sludge and processed waste; comprising a primary combustion chamber (2) and a secondary combustion chamber (3), where a cooled grate (6) for fuel is arranged below the primary combustion chamber (2), and an air supply (5) is arranged below the grate, which is divided in a certain number of zones, and nozzles (15, 16) are further arranged for the supply of air to the secondary chamber (3), characterized in that the primary and the secondary combustion chamber (2, 3) are at least partially separated by a dividing plate (10), and that the zones (5) are individually controllable and have a supply of air and recycled flue gas, preferably at a high temperature, and that at least one of the nozzles (15) is adjustable and directed towards the primary air chamber (2) to ensure an annealing on the grid (6). 2. Ovn i samsvar med krav 1, karakterisert ved at deleplata 10 er bevegelig i sideretning.2. Furnace in accordance with claim 1, characterized in that the dividing plate 10 is movable laterally. 3. Ovn i samsvar med krav 1-2, karakterisert ved at deleplata 10 er bevegelig i høyderetning.3. Furnace in accordance with requirements 1-2, characterized in that the dividing plate 10 is movable in the vertical direction. 4. Ovn i samsvar med krav 1-3, karakterisert ved at deleplata 10 er utstyrt med bafler (11) som kan flyttes på deleplata, og kan ha ulik geometri.4. Furnace in accordance with requirements 1-3, characterized in that the dividing plate 10 is equipped with baffles (11) which can be moved on the dividing plate, and can have different geometries. 5. Ovn i samsvar med krav 1-4, karakterisert ved at ytterligere bafler (12) er anordnet i toppveggen av forbrenningskammeret.5. Furnace in accordance with requirements 1-4, characterized in that additional baffles (12) are arranged in the top wall of the combustion chamber. 6. Ovn i samsvar med krav 1-5, karakterisert ved at blandingen av luft og røykgass til sonene (5) styres ut fra målte verdier av temperaturen i primær-, henholdsvis sekundærkammeret (2, 3) og sammensetting av avgassen gjennom røykuttakene (14).6. Furnace in accordance with requirements 1-5, characterized in that the mixture of air and flue gas to the zones (5) is controlled based on measured values of the temperature in the primary and secondary chambers (2, 3) and composition of the exhaust gas through the smoke outlets (14).
NO19925023A 1992-12-28 1992-12-28 grate furnace NO176455B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NO19925023A NO176455B1 (en) 1992-12-28 1992-12-28 grate furnace
PCT/NO1993/000191 WO1994015148A1 (en) 1992-12-28 1993-12-14 Grate furnace
AT94904017T ATE168459T1 (en) 1992-12-28 1993-12-14 GRATE FIRING
EP94904017A EP0676023B1 (en) 1992-12-28 1993-12-14 Grate furnace
AU58238/94A AU5823894A (en) 1992-12-28 1993-12-14 Grate furnace
DE69319741T DE69319741T2 (en) 1992-12-28 1993-12-14 RUST FIRE
DK94904017T DK0676023T3 (en) 1992-12-28 1993-12-14 grate furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO19925023A NO176455B1 (en) 1992-12-28 1992-12-28 grate furnace

Publications (5)

Publication Number Publication Date
NO925023D0 NO925023D0 (en) 1992-12-28
NO925023A NO925023A (en) 1994-06-29
NO176455B true NO176455B (en) 1994-12-27
NO176455C NO176455C (en) 1995-04-05
NO176455B1 NO176455B1 (en) 1995-04-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
NO19925023A NO176455B1 (en) 1992-12-28 1992-12-28 grate furnace

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ATE168459T1 (en) 1998-08-15
EP0676023A1 (en) 1995-10-11
DE69319741D1 (en) 1998-08-20
AU5823894A (en) 1994-07-19
NO925023A (en) 1994-06-29
NO176455B1 (en) 1995-04-24
DE69319741T2 (en) 1999-02-11
NO925023D0 (en) 1992-12-28
DK0676023T3 (en) 1999-04-19
EP0676023B1 (en) 1998-07-15
NO176455C (en) 1995-04-05
WO1994015148A1 (en) 1994-07-07

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