US3418062A - Burner structures - Google Patents

Burner structures Download PDF

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Publication number
US3418062A
US3418062A US571085A US57108566A US3418062A US 3418062 A US3418062 A US 3418062A US 571085 A US571085 A US 571085A US 57108566 A US57108566 A US 57108566A US 3418062 A US3418062 A US 3418062A
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United States
Prior art keywords
fuel
burner
soaking
air
soaking pit
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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.)
Expired - Lifetime
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US571085A
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English (en)
Inventor
James E Hovis
Rolland L Hoffman
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Bloom Engineering Co Inc
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Bloom Engineering Co Inc
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Filing date
Publication date
Application filed by Bloom Engineering Co Inc filed Critical Bloom Engineering Co Inc
Priority to US571085A priority Critical patent/US3418062A/en
Priority to GB29466/67A priority patent/GB1187445A/en
Priority to BE702070D priority patent/BE702070A/xx
Priority to NL6710591A priority patent/NL6710591A/xx
Priority to DE19671583337 priority patent/DE1583337A1/de
Priority to FR116327A priority patent/FR1533029A/fr
Priority to LU54212D priority patent/LU54212A1/xx
Application granted granted Critical
Publication of US3418062A publication Critical patent/US3418062A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/70—Furnaces for ingots, i.e. soaking pits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel

Definitions

  • the burner structure comprises a body member, means mounted on said body member for defining a relatively larger outer ring port and a relatively smaller inner firing port disposed coaxially and inwardly of said outer firing port, first annular air passage means coupled to said outer firing port in bypassing relation to said inner firing port, fuel passage means coupled centrally to said inner firing port, second annular air passage means coupled to said inner firing port and surrounding said fuel passage means, and valve means coupled to each of said first and said second air supplying means, at least said second air passage means being so shaped that combustion air passing therethrough forms a confining envelope around fuel passage means in avoidance of the surfaces of said outer firing port.
  • the present invention relates to burner structures suitable for use in soaking pit furnaces or the like and to means for operating pit furnaces, more commonly known as soaking pits.
  • Pit-type furnaces or soaking pits are widely used throughout the steel industry for heating ingots of steel to rolling or forging temperatures. Although obviously not limited thereto, the apparatus and method of the invention will be exemplified in connection with firing and operating soaking pits for heating steel ingots or slabs to rolling temperatures.
  • the steel in gots to be heated for the aforementioned purpose usually are positioned in spaced relation in the soaking pit chamber, and the pit is provided with a removable top cover to permit the entry and removal of ingots by suitable ingot handling apparatus.
  • the cover When the soaking pit has been charged with ingots, the cover is positioned upon the coping or rails at the top of the soaking pit, and a combustion system is operated to deliver fluid fuel and combustion air into the soaking pit.
  • one or more burners are employed to introduce the fuel and combustion air at a relatively high velocity, which fills the soaking pit chamber with flames and hot products of combustion.
  • the soaking pit is of elongated construction and the one or more burners are located on an end wall of the pit. Accordingly, it is important that the burners be capable, at all times and under all operating conditions of the soaking pit, of circulating completely and uniformly the hot combustion gases throughout the pit including the spaces between the ingots.
  • a flue duct is coupled to the soaking pit and to a flue system that leads to a suitable exhaust stack.
  • the flow of combustion products through the flue system usually is regulated by a damper or the like such that an over-pressure is maintained in the soaking pit as long as the cover is positioned thereon and while the ingots are being heated.
  • the ingots are delivered to the soaking pits at a temperature substantially below rolling temperature, where they are heated and then soaked at a specified rolling temperature, which may vary Patented Dec. 24, 1968 icc between 2000 F. and 2450" F.
  • the ingots are heated to bring them up to this temperature and then thermally soaked for an additional period to ameliorate temperature differentials therein. A longer or shorter holding period may then follow dependent upon demand for heated ingots at the forge or rolling mill.
  • the maximum heating capacity of the soaking pit or furnace is thus established by the fuel requirements of the heating portion of the soaking pit operating cycle.
  • the heating patterns within the soaking pit are distorted inasmuch as the combustion systems are primarily geared to the fuel demand and hot gas circulation requirements of the heating portion of the cycle. Accordingly, as the soaking portion of the soaking pit cycle is commenced, the necessary reduction in fuel demand foreshortens the hot gas circulation through the soaking pit such that the ingots nearer the burner or burners become overheated in order to maintain the required soaking temperature at the far end of the soaking pit, i.e., adjacent the end wall of the soaking pit which is opposite from the burner and flue wall. In some cases the top portions of the nearer ingots begin to melt. The problem becomes more aggravated when the soaking pit is overloaded or is loaded improperly, for example, as in the undesirable, herring-bone pattern.
  • a single large burner is utilized and is so constructed as to operate efficiently as a high-velocity burner during the heating portion of the cycle to provide a uniform heating and temperature distribution throughout the soaking pit furnace and the ingots therein.
  • the single, large burner must be turned down so that it no longer can function as a high-velocity burner, and the hot combustion gases produced thereby begin to short circuit through a path in the nearer or burner end portion of the soaking pit.
  • the nearer ingots become overheated in order to maintain the ingots adjacent the far end of the soaking pit at the proper working temperature.
  • the burner structures are each constructed or arranged so that they can discharge hot gases at maximum velocity and heating eiciency along substantially the entire length of the soaking Ipit in order to provide a uniform circulation of hot combustion gases throughout the pit, during any portion of the soaking pit cycle and at the widely varying fuel requirements dictated thereby.
  • the unusual result attained by the disclosed method and apparatus stems from the fact that uniform heating of the soaking pit is attained both during the heating and soaking portions of the operating cycle which has not heretofore been accomplished by known heating arrangements, as stated previously.
  • the heating or maximum capacity burner is arranged in a novel fashion Ias an annular structure surrounding the soaking/hold burner structure, and the concentric burner structure is mounted on the front end wall of the soaking pit generally at the location of the single, large conventional burner mentioned above.
  • the concentric burner structure is disclosed herein and are described hereinafter more particularly in the forthcoming detailed description of the invention. At this point, however, it should be noted that each section, i.e., the annular maximum capacity section or the inner soaking or hold section are each arranged for high-velocity operation at their respective fuel capacities.
  • FIGURE 2 is a top plan view, partially sectioned, of another soaking pit and burner arrangement of the invention illustrating another novel method of soaking pit operation;
  • FIGURE 6 is a cross-sectional view of the burner apparatus as shown in FIGURE 5 and taken along reference line VI-VI thereof;
  • FIGURE 7 is a cross-sectional view of the burner apparatus as shown in FIGURE 5 and taken along reference line VII-VII thereof;
  • FIGURE 9 is a cross-sectional view of the ybur-ner structure shown in lFIGURE 8 and taken along reference line IX-IX thereof; l ,y
  • FIGURE l0 is alongitudinally sectioned view of still another form of the burner structure of the invention.
  • a soaking pit 10 and burner arrangement 12 are illustrated therein in exemplication of one method of operating a soaking pit in accordance with the invention.
  • a battery of soaking pits for example 10A and 10B, portions of which are shown in FIGURE 1, are operated together.
  • a common gas or fuel header 14 is provided for a number of soaking pits while flue ducts 16 of a pair of soaking pits are coupled to a single exhaust stack (not shown).
  • a recuperator structure (not shown) is mounted in each exhaust duct for preheating the combustion air supplied to the recuperator from a suitable blower.
  • the outlet of the recuperator is coupled to an associated air manifold 18 from which the aforementioned burner arrangement 12, in this example, is supplied by individual conduits 20.
  • the burner arrangement 12 comprises three burners, 22, 24 and 26, to which fuel, gas or the like is supplied through a branched conduit system 28, the inlet of which is coupled through control valve 30 to the fuel header 14.
  • An intermediate burner 24 is positioned centrally in the upper portion of the front end wall 34, with side burners 22 and 26 being located closely adjacent thereto and on the same elevation in this example.
  • the intermediate burner 24 is utilized in this example as the aforedescribed soak hold burner and is provided with about -40% of the rated capacity of one of the adjacent burners 22 and 26.
  • the latter burners 22, 26 together constitute the heating burner arrangement of the soaking pit furnace and also together equal the rated heating capacity of the pit furnace.
  • the heating burners 22, 26 are of the same size and configuration,
  • the heating burners 22, 26, are preferably utilized as part of this burner arrangement in order to provide overall llame symmetry in the soaking pit and uniform heating and circulation of the atmosphere thereof.
  • the heating burners 22, 26 are therefore operated simultaneously but only during the heating portion of the soaking pit cycle.
  • the heating burners 22, 26 are shut off by means of gas valves 36 and suitable valves (not shown) in the air conduits 20.
  • the central soak hold burner 24 is turned on to maintain the soaking pit and the ingots therein at the desired rolling or working temperature of the ingots.
  • FIGURES 2 and 3 of the drawings another method of soaking pit operation in accordance with the invention is illustrated.
  • a single large burner 44 of rated soaking pit capacity is mounted in one end -wall 34a, generally at the location occupied by the soaking/hold burner 24 of FIGURE 1.
  • a substantially smaller soak/hold burner 24 is mounted.
  • the large high-velocity burner 44 and the small high-velocity burner 24 can be mounted directly opposite from one another, and desirably are so mounted, on the same soaking pit axis as denoted by reference line III-III.
  • the vertical, dashed line 56 denotes the optimum time of lingot removal, whereat the ingots are uniformly heated to the ingot rolling temperature as denoted by curve 58. However, the ingots are frequently left in the soaking pit beyond the ideal soaking period, which is denoted in FIGURE 4, giving rise to a holding period denoted in the graph of FIGURE 4 to the right of the vertical line 56.
  • Curve 60 denotes the control temperature of the soaking pit which is slightly higher than the desired rolling temperature.
  • the ingots frequently are left in the soaking pit beyond the ideal soaking period giving rise to the holding portion of the FIG- URE 4 graph.
  • the temperature of the soaking pit burner wall and of the nearer ingots, or :of the intermediate ingots as the case may be continues to rise as denoted lby curves 62 and 64 respectively.
  • a uniformly heated atmosphere is attained within the soaking pit ⁇ both during the soaking and holding periods. Furthermore, the consumption of fuel is reduced during the holding period by eliminating the necessity of using additional excess combustion air.
  • the soaking pit operational methods and the apparatus therefor are arranged such that the front and rear end wall temperatures can ⁇ be maintained essentially the same for an indefinite period of time as denoted by curve 60. It follows then that the ingot temperature likewise can be held uniformly for an indefinite period of time as denoted by curve 58.
  • the burner 66 includes a body structure 68 which is closed at the 4outlet or llame end by combustion air passage means such as a baille structure denoted generally by reference character 70 and fabricated from either refractory or water-cooled structures.
  • the body 68 can 'be bolted or otherwise secured to a furnace wall 72 by means of its outlet flange 74. When thus secured, the outlet of the body structure is aligned with firing port 76 extending transversely through the furnace wall 72.
  • the baille structure 70 includes a first annular baille 78 provided with generally longitudinally extending air passages 80 which are, in this example, arranged in an equally spaced annular array around the baille 78. In this example, six such passages are utilized, although it will be obvious that la greater or lesser number can be employed. Positioned inwardly, and in this example axially, of the'annular baille 78 is. a generally tubular inner port block 82, the free inner surface 84 of which defines a second firing chamber or port. A second annular baille 86, which can be constructed Ias mentioned in oonnection with the baille 70, is mounted within the port block 82 adjacent the inner or front end thereof.
  • the inner and outer burner sections thereof can 'be operated simultaneously or separately. In the simultaneous operation, combustion will occur b-oth at the inner firing port 84 and at the outer firing port 76 as the fuel respectively comes in contact with air supplied through the inner air passages 86 and the outer air passages 80.
  • means are mounted within the fuel conduit 92 for imparting a spin to the incoming fluid fuel.
  • One arrangement for thus imparting the spin includes the use of one or more spiral vanes 110 mounted in the fuel conduit 92 adjacent its outlet end, as better shown in FIGURE 5 of the drawings. The spin thus imparted to the incoming fuel enables a llame front to be established extending across the entire width of the outer firing port 76 adjacent the outer air passages 80.
  • the capacity of the inner burner structure is substantially less than that of the outer burner structure.
  • the fuel throttling valve 106 is turned down to correspondingly reduce the ow of fuel into the inner firing port 84.
  • combustion now takes place in the inner firing port 84 and a flame front is established thereacross adjacent the openings of the inner air passages 88 and substantially independently of the outer firing port 76.
  • the spin imparted by spiral vane or vanes 110 is likewise considerably reduced.
  • FIGURES 8 and 9 of the drawings a modified form of the burner arrangement of FIGURES -7 is illustrated wherein similar components are denoted by similar reference characters with primed accents.
  • outer and inner tiring ports 76 and 84 together with outer and inner air passages 80' and 88' are provided, and the air passages ⁇ are supplied with combustion air, as described above, with reference to FIGURES 5-7.
  • a relatively smaller central fuel conduit 92 is utilized solely for supplying fuel to the smaller or inner ring port 84'. Accordingly the spiral vanes or other spinning means of FIGURES 5-7 are omitted.
  • a high-velocity flame can be produced in the outer tiring port 76 only by suitably manipulating fuel and air valves 120 and 122, respectively, which are shown schematically in FIGURE 8.
  • valves 120 and 122 are shut off and air and fluid fuel are introduced into the inner firing port 84 by suitably manipulating valves 104 and 106', respectively.
  • a highenergy ame can be established in the inner tiring port 84' in the same manner as described above with reference to FIGURES 5-7.
  • the burner structure 124 of FIGURES 10 and 1l differs from the burner structure 111 of FIGURES 8 and 9 primarily in the manner of supplying combustion air respectively to the outer air passages 80' and to the inner air passages 88.
  • This arrangement of the invention is adapted particularly to supply such combustion air through a common throttling valve which can Ibe adjusted to supply such combustion air solely to the outer or to the inner air passages, or in varying amounts to both groups of passages when desired.
  • an air conduit 126 extends from an opening 128 in a partition 130 extending transversely across the body structure 68 of the burner 124, as better shown in FIGURE ll.
  • the other end of the air conduit 126 is extended through the annular fuel conduit 114', where it engages the inner face of the inner bafe 86' to communicate with the inner passages 88', as described above in connection with FIGURES 8 and 9.
  • the body partition 130 also divides the air inlet port 132 at the inlet end portion and extends to a Valve mechanism mounted on a shaft, one end of which protrudes through the Wall of the inlet 132 to which suitable valve operating means (not shown) are secured to manipulate the valve 134.
  • combustion air is directed entirely into valve body chamber 138 and thence through conduit 126 to the inner air passages 88'.
  • fuel valve 120 is closed and fuel valve 106 is opened to supply fuel only to the central fuel opening A flame front is thus established in the inner firing port 84 as described previously.
  • valve 134 When operation only of the outer burner section is desired, the valve 134 is moved to its chain outline position 134b so that combustion air is introduced only to burner body chamber 140 from which it ows through the outer air passages 80 directly into the outer tiring port 76'. At this time, the fuel valve 106 is closed and the fuel valve is opened to supply fuel through inlet 112 and annular fuel conduit 114 to the annular array of fuel passages 116. In this case, a ame front is established in the outer tiring port 76 as noted previously.
  • valve 134 Between the extreme positions 134a and 134b of the valve 134, the latter can be continuously adjusted for the simultaneous operation of both burner sections with the percentage of maximum or rated ⁇ burner capacity in one section being varied inversely with that of the other. rIhus, when the valve 134 is near its closed position 13411, i.e., in its solid outline position of FIGURE l0, the inner burner section is operated near its maximum capacity while the outer yburner section is operated near its minimum capacity. In this case, the fuel throttling valves 106 and 120' are accordingly adjusted to supply the appropriate and similar percentages of maximum fuel ow to the respective burner sections.
  • remote valve actuating vmeans can be coupled to the air valve 134 and to the fuel valves 106 and 120 to produce corresponding adjustments in the fuel valves 106 and 120', as the air valve 134 is moved between its extreme positions. It is contemplated further that similar valve actuating means can be coupled to air Valves 104 and 122' and to fuel valves 106 and 120 of FIGURE 8 or to the similar valves mentioned in connection with FIGURES 5-7, to provide for similar continuous variation and operation of the inner and outer burner sections of these modifications also.
  • said supplying means include an air chamber defined by said body member and communicating with said first air passage means, and said second air passage means and said fuel passage means include an annular bafileinserted into the inward end portion of said inner firing port, said baflie having a central fuel passage and a plurality of air passages disposed radially outwardly of said fuel passage.
  • said supplying means include a fuel conduit extending into said body member to the fuel passage means of said inner firing port, and spin means are mounted in said fuel conduit for imparting substantial spin to fuel flowing therethrough to said inner firing port upon the velocity of said fuel being that required to establish a ame front in said outer firing port.
  • said port block is of bipartite construction including an annular member having said first air passage means therein and a generally tubular member fitted therein and extend# ng rearwardly of said annularv member for connection to said second air passage means and said fuel passage means, said fuel channels being formed Vat least ⁇ in part by a like number of grooves formed upon the outer surface of said tubular member and enclosed by engage? ⁇ ment with said annular member.
  • said port block is of tripartite construction and includes an outer annular member closely fitted withinsaid vbody member and having said first air passage means therein, a tubular member closely fitted within said oute'annular' member and extending rearwardly thereof, said' tubular member defining said inner firing port, and an inner annular member closely fitted within the extended portion of said tubular member, said second air passage means are extended through saidl inner annular member and positioned radially outwardly of its innery opening, and said fuel passage means include the central opening of said inner annular member.
  • A- composite burner structure Vcomprising a body member, means mounted on' said body member forA defining a relatively larger outer firing port and a relatively smaller inner ring port disposed co-axially and inwardly of said outer firing port, first annular lair passage means coupled to said outer firing port in lbyypassing relation to said inner firing port, fuel passagemeansfcoupled generally centrally to said inner firing port, second annular air passage means coupled to said inner' lfiring portl and surrounding said fuel passage means, and valve means coupled to each of said first and said second airv supplying means, at least said second air passage means being so vshaped that combustion air when passing therethrough forms a confining envelope around vfuel issuing from said fuel passage means in avodanceof the surfacesgof said outer firing port.
  • said first passage means include a plurality of air passages inclined radially outwardly of said burner lbody.
  • said second air passage means include a plurality of elongated air passages disposed generally parallel to the axis of said inner ring port.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
US571085A 1966-08-08 1966-08-08 Burner structures Expired - Lifetime US3418062A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US571085A US3418062A (en) 1966-08-08 1966-08-08 Burner structures
GB29466/67A GB1187445A (en) 1966-08-08 1967-06-26 Burner Structures for Soaking Pits
BE702070D BE702070A (xx) 1966-08-08 1967-07-28
NL6710591A NL6710591A (xx) 1966-08-08 1967-07-31
DE19671583337 DE1583337A1 (de) 1966-08-08 1967-07-31 Brennerkonstruktionen fuer Tiefoefen und Verfahren zum Betreiben derselben
FR116327A FR1533029A (fr) 1966-08-08 1967-07-31 Dispositif formant structure de brûleur ou d'appareil chauffant analogue pour four de réchauffage ou analogue, son procédé de mise en oeuvre et leurs diverses applications
LU54212D LU54212A1 (xx) 1966-08-08 1967-07-31

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Application Number Priority Date Filing Date Title
US571085A US3418062A (en) 1966-08-08 1966-08-08 Burner structures

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US3418062A true US3418062A (en) 1968-12-24

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US571085A Expired - Lifetime US3418062A (en) 1966-08-08 1966-08-08 Burner structures

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US (1) US3418062A (xx)
BE (1) BE702070A (xx)
DE (1) DE1583337A1 (xx)
GB (1) GB1187445A (xx)
LU (1) LU54212A1 (xx)
NL (1) NL6710591A (xx)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2343861A1 (de) * 1972-08-30 1974-04-18 Bloom Eng Co Inc Brenner mit einstellbarer flamme fuer industrieoefen
US3814327A (en) * 1971-04-06 1974-06-04 Gen Electric Nozzle for chemical reaction processes
FR2430455A1 (fr) * 1978-07-03 1980-02-01 Nova Hut Klementa Gottwalda Four pit de rechauffage de lingots
US4338099A (en) * 1979-12-26 1982-07-06 Texaco Inc. Process for the partial oxidation of slurries of solid carbonaceous fuels
US4353712A (en) * 1980-07-14 1982-10-12 Texaco Inc. Start-up method for partial oxidation process
US4364744A (en) * 1979-12-26 1982-12-21 Texaco Inc. Burner for the partial oxidation of slurries of solid carbonaceous fuels
US4386941A (en) * 1979-12-26 1983-06-07 Texaco Inc. Process for the partial oxidation of slurries of solid carbonaceous fuel
US4392869A (en) * 1980-07-14 1983-07-12 Texaco Inc. High turndown partial oxidation process
US4394137A (en) * 1980-12-03 1983-07-19 Texaco, Inc. Partial oxidation process
US4400179A (en) * 1980-07-14 1983-08-23 Texaco Inc. Partial oxidation high turndown apparatus
US4475885A (en) * 1983-07-28 1984-10-09 Bloom Engineering Company, Inc. Adjustable flame burner
US4490156A (en) * 1981-06-10 1984-12-25 Texaco Inc. Partial oxidation system
US4553925A (en) * 1982-09-24 1985-11-19 Bricmont & Associates, Inc. Flow distribution header system
US4615895A (en) * 1985-04-18 1986-10-07 Nabisco Brands, Inc. Forced air/gas burner and baking oven incorporating same
US4622007A (en) * 1984-08-17 1986-11-11 American Combustion, Inc. Variable heat generating method and apparatus
US4786247A (en) * 1985-04-18 1988-11-22 Nabisco Brands, Inc. Method of lengthening the flame from a gas burner
AT391195B (de) * 1987-09-21 1990-08-27 Vaillant Gmbh Verfahren zur verbrennung fluessiger oder gasfoermiger brennstoffe und vorrichtung zur durchfuehrung des verfahrens
USRE33374E (en) * 1985-04-18 1990-10-09 Nabisco Brands, Inc. Forced air/gas burner and baking oven incorporating same
USRE39425E1 (en) * 1993-07-15 2006-12-12 Maxon Corporation Oxygen-fuel burner with integral staged oxygen supply
US7175423B1 (en) * 2000-10-26 2007-02-13 Bloom Engineering Company, Inc. Air staged low-NOx burner
US20070072141A1 (en) * 2003-11-28 2007-03-29 Marco Daneri Low polluting emission gas burner
US20090136406A1 (en) * 2007-11-27 2009-05-28 John Zink Company, L.L.C Flameless thermal oxidation method
US20090133854A1 (en) * 2007-11-27 2009-05-28 Bruce Carlyle Johnson Flameless thermal oxidation apparatus and methods
US20100227284A1 (en) * 2006-01-31 2010-09-09 Tenova S.P.A. Flat-flame vault burner with low polluting emissions
IT201700050172A1 (it) * 2017-05-09 2018-11-09 Sms Group S P A Bruciatore industriale a combustibile gassoso con basse emissioni di nox
EP3786524A1 (de) * 2019-08-27 2021-03-03 Gautschi Engineering GmbH Regenerativbrenner für stark reduzierte nox emissionen
CN111947134B (zh) * 2020-08-31 2024-06-07 华北电力科学研究院有限责任公司 制粉燃烧系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083677A (en) * 1976-09-22 1978-04-11 Bloom Engineering Company, Inc. Method and apparatus for heating a furnace chamber

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US1194740A (en) * 1916-08-15 Campbell mubbay hunter
US2297696A (en) * 1940-10-29 1942-10-06 Elder Harold Griffin Furnace
US2458543A (en) * 1945-04-24 1949-01-11 Comb Processes Company Low velocity gas burner
US3198855A (en) * 1962-04-24 1965-08-03 Loftus Engineering Corp Method of operating soaking pits
US3209811A (en) * 1963-03-28 1965-10-05 Loftus Engineering Corp Combination high velocity burner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1194740A (en) * 1916-08-15 Campbell mubbay hunter
US2297696A (en) * 1940-10-29 1942-10-06 Elder Harold Griffin Furnace
US2458543A (en) * 1945-04-24 1949-01-11 Comb Processes Company Low velocity gas burner
US3198855A (en) * 1962-04-24 1965-08-03 Loftus Engineering Corp Method of operating soaking pits
US3209811A (en) * 1963-03-28 1965-10-05 Loftus Engineering Corp Combination high velocity burner

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814327A (en) * 1971-04-06 1974-06-04 Gen Electric Nozzle for chemical reaction processes
DE2343861A1 (de) * 1972-08-30 1974-04-18 Bloom Eng Co Inc Brenner mit einstellbarer flamme fuer industrieoefen
FR2430455A1 (fr) * 1978-07-03 1980-02-01 Nova Hut Klementa Gottwalda Four pit de rechauffage de lingots
US4386941A (en) * 1979-12-26 1983-06-07 Texaco Inc. Process for the partial oxidation of slurries of solid carbonaceous fuel
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NL6710591A (xx) 1968-02-09
GB1187445A (en) 1970-04-08
LU54212A1 (xx) 1967-10-02
BE702070A (xx) 1968-01-29
DE1583337A1 (de) 1970-10-15

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