EP0398001A1 - Brûleur pour réchauffeur à air - Google Patents

Brûleur pour réchauffeur à air Download PDF

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Publication number
EP0398001A1
EP0398001A1 EP90105965A EP90105965A EP0398001A1 EP 0398001 A1 EP0398001 A1 EP 0398001A1 EP 90105965 A EP90105965 A EP 90105965A EP 90105965 A EP90105965 A EP 90105965A EP 0398001 A1 EP0398001 A1 EP 0398001A1
Authority
EP
European Patent Office
Prior art keywords
slot spaces
gas
air
box
channels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90105965A
Other languages
German (de)
English (en)
Inventor
Helmut Palz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Didier Werke AG
Original Assignee
Didier Werke AG
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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0398001A1 publication Critical patent/EP0398001A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes

Definitions

  • the invention relates to a burner for a gas heater which has a plurality of parallel, elongated slot spaces which are alternately connected to a gas inlet and an air inlet and which lead upwards to a mixing zone in which gas and air are mixedly divided into a plurality of combustion nozzles.
  • a burner is also known in which the air in the upper part of the burner is accelerated by means of nozzles, the nozzles being directed into the gas stream, which is only a small one Has kinetic energy.
  • This way of mixing requires a high mixing energy. Pulsations can occur during the burning process, which are undesirable because they put mechanical stress on the burner, interfere acoustically and adversely affect the burning behavior. Fluctuations in the calorific value of the gas favor such pulsations.
  • the object of the invention is to propose a burner of the type mentioned in the introduction, in which the flow is evened out and the combustion is improved.
  • the above object is achieved in that the slot spaces are separated by thin-walled plates of a deflection box, that the one slot spaces of the deflection box are narrow on the narrow side open to the entry of the one medium, the direction of inflow being in the direction of the longitudinal extent of the slot spaces, that the other slot spaces of the deflection box below are open to the entry of the other medium that channels are formed from refractory shaped bricks above the deflection box and a compensation box, which divide the flow from each of the elongated slot spaces into several smaller flow cross sections, the total flow cross section of the channels being smaller than that of the slot rooms and that the channels lead to the mixing zone made of refractory shaped bricks, gas and air from adjacent channels mixing in the mixing zone and the flow cross section narrowing in the combustion nozzles.
  • Each slot space opens into several rectangular channels made of refractory shaped bricks, which are thick-walled compared to the slabs.
  • the flow rate increases.
  • the fireproof shaped blocks give the ducts a high level of mechanical stability and protect the lower steel part from radiation from above.
  • the partial flows of gas and air are mixed. Since the air or gas is evenly distributed in the channels, the mixing of the two flow media is also uniform, so that the flames of all the combustion nozzles develop evenly. This is the prerequisite for complete and quiet, pulsation-free combustion. In the combustion nozzles, the narrowing of the flow cross-section results in a considerable increase in the flow speed, which favors the mixing process.
  • a burner 2 is installed in a hot air heater 1, to which a gas pipe 3 and an air pipe 4 are connected one above the other.
  • the gas pipeline 3 opens into an inflow box 5 of the burner 2.
  • the air pipeline 4 opens into an inflow box 6 of the burner 2.
  • the flow cross sections of the inflow boxes 5, 6 are substantially larger than those of the gas pipeline 3 or the air pipeline 4.
  • the inflow box 5 is arranged laterally next to a deflection box 7 of the burner 2.
  • the inflow box 6 is located below the deflection box 7.
  • the compensation box (14) is located above the deflection box 7.
  • the deflection box 7 consists of a plurality of thin-walled plates 8, which consist of heat-resistant steel, cast iron or fine ceramics.
  • Vertical slot spaces 9 are formed between the plates 8.
  • Each second slot space 9 is open on the narrow side on its side 10 to the gas inflow box 5 and closed at the bottom to the air inflow box 6.
  • the longitudinal extent of the slits extends in the direction of inflow of the gas.
  • the other slot spaces 9 are open on their underside 11 to the air inflow box 6. They are closed against the gas inflow box 5. All slot spaces 9 are open at the top.
  • the widths of the slot spaces 9, i.e. the distances between the plates 8 are all the same in the embodiment of Figure 3. However, they can also be different, so that the slot spaces assigned to one medium are larger than the slot spaces assigned to the other medium.
  • the slot spaces 9 for the gas are twice as wide as the slot spaces 9 'for the air.
  • the embodiment of Figure 6 follow a slot space 9 for gas, two slot spaces 9 'for air.
  • adjustable diaphragms (not shown in more detail) can be provided on the open sides 10 and / or on the open undersides 11 of the slot spaces 9. It is thus possible to control the air entering the deflection box 7 and / or the gas entering the deflection box 7.
  • the diaphragms can be used to close off individual slit spaces 9, or the entry cross sections into the slit spaces can be reduced.
  • the burner 2 can thus also be operated with smaller amounts of combustion, as is desired, for example, for heating the hot-water heater.
  • pipe pieces 12 run perpendicular to the plates 8.
  • a part of the pipe pieces 12 extends closed through one or more air-guiding slot spaces 9. These tube pieces 12 are open at both ends in gas-guiding slot spaces 9.
  • Another part of the pipe sections 12 extends closed through one or more gas-carrying slot spaces 9. These tube pieces 12 are open at both ends in air-guiding slot spaces 9.
  • a flow compensation in the transverse direction can thus take place through the pipe pieces 12, on the one hand between gas-carrying slot spaces 9 and on the other hand between air-carrying slot spaces 9.
  • the pipe pieces 12 in the slot spaces 9 lead to an even flow due to their outer surface.
  • baffles 13 are provided in the gas-carrying slot spaces. These support the redirection of the gas flow from its side inlet (page 10) to its outlet upwards.
  • the baffles 13 are adjustable.
  • an additional compensation box 14 is placed on top of the deflection box 7. This is constructed essentially the same as the deflection box 7. Both the air-guiding and the gas-guiding slot spaces are flowed through from bottom to top.
  • the slot spaces of the compensation box 14 are aligned with the slot spaces 9 of the deflection box 7. Further pipe sections 15 lead to a flow compensation between the gas-carrying slot spaces on the one hand and the air-carrying slot spaces on the other hand.
  • the equalization box 14 is not necessary in all cases.
  • the burner 2 has vertical channels 16 above the equalization box 14. These are formed by refractory ceramic shaped stones 17. Each slot space 9 opens into a plurality of such channels. The total flow cross-section of these channels is smaller than the flow cross-section of the assigned slot space 9. Accordingly, the flow velocity of the air or gas in the channels 16 increases.
  • the shaped block 17 has lugs 18 which form flow bodies in the channels 16 and thus further even out the flow.
  • a mixing zone 19 is formed above the channels 16 and is likewise constructed from refractory shaped stones 20.
  • the shaped blocks 20 form conically tapering burning nozzles 21.
  • Each burning nozzle 21 has a rectangular cross section (cf. FIG. 1).
  • the combustion nozzles 21 are arranged above the channels 16 in such a way that air and partly gas enter the combustion nozzle 21. Due to the conical shape of the burning nozzle 21, the flow rate of the gas-air mixture increases. This favors even mixing by increasing the mixing energy.
  • part of the air from an air-conducting duct 16 and part of the gas from an adjacent duct 16 open into each combustion nozzle 21.
  • the air-guiding channels 16 '- corresponding to the different width of the slot spaces 9, 9' - are less wide than the gas-guiding channels 16.
  • a gas-guiding channel 16 and two air-guiding channels 16 ' open into each combustion nozzle 21.
  • refractory shaped stones 22 are placed on the shaped stones 20 of the mixing zone 19. These form a grid. They stand back from the flame-side opening of the combustion nozzles 21. This will stabilize the flames.
  • the flow cross sections in the individual areas are designed approximately as follows:
  • the total flow cross section at the flame-side outlet of the combustion nozzles 21 is approximately equal to the sum of the cross sections of the pipelines 3, 4 which have the same cross section.
  • the flow cross section of the inflow boxes 5, 6 is approximately four to five times the cross section of the respective pipeline 3 or 4.
  • the flow cross section in the slot spaces 9 is narrowed by approximately half.
  • the flow cross section in the channels 16 is narrowed again by half. This is associated with a corresponding reduction in the flow velocity in the inflow boxes 5, 6. A corresponding increase in the flow velocity takes place toward the combustion nozzles 21, the gas and air flow being divided several times in this way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Gas Burners (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP90105965A 1989-05-13 1990-03-29 Brûleur pour réchauffeur à air Withdrawn EP0398001A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3915704A DE3915704A1 (de) 1989-05-13 1989-05-13 Brenner fuer einen winderhitzer
DE3915704 1989-05-13

Publications (1)

Publication Number Publication Date
EP0398001A1 true EP0398001A1 (fr) 1990-11-22

Family

ID=6380632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105965A Withdrawn EP0398001A1 (fr) 1989-05-13 1990-03-29 Brûleur pour réchauffeur à air

Country Status (6)

Country Link
US (1) US5033958A (fr)
EP (1) EP0398001A1 (fr)
JP (1) JPH02306008A (fr)
AU (1) AU633088B2 (fr)
DE (1) DE3915704A1 (fr)
FI (1) FI902246A0 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834040B1 (fr) 1996-04-20 2000-08-09 Ahmad Al-Halbouni Foyer avec un dispositif de brûleur et procédé de fonctionnement d'un foyer
SE1050114A1 (sv) * 2010-02-05 2010-12-14 Linde Ag Förfarande vid förbränning av lågvärdigt bränsle
JP2012241203A (ja) * 2011-05-16 2012-12-10 Nippon Steel Engineering Co Ltd 熱風炉用セラミックバーナ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1261312A (fr) * 1960-04-05 1961-05-19 Saint Gobain Procédé et dispositif statique de mélange de fluides
DE1262491B (de) * 1962-02-27 1968-03-07 Heinrichtung Koppers Ges Mit B Brennereinrichtung zur Beheizung turmartiger Regenerativ-Gas- oder Winderhitzer
DE3505940A1 (de) * 1985-02-21 1986-08-21 Krupp Koppers GmbH, 4300 Essen Keramischer brenner, insbesondere fuer winderhitzer
EP0260736A1 (fr) * 1986-09-16 1988-03-23 Hoogovens Groep B.V. Procédé pour mélanger deux ou plusieurs courants de gaz

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044861A (en) * 1958-02-27 1962-07-17 Carbonic Dev Corp Regenerative apparatus
US4235593A (en) * 1979-03-27 1980-11-25 Republic Steel Corporation Blast stove
DE3150574C2 (de) * 1981-12-21 1989-02-23 Martin & Pagenstecher GmbH, 5000 Köln Keramischer Brenner für einen senkrechten Winderhitzer-Brennschacht

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1261312A (fr) * 1960-04-05 1961-05-19 Saint Gobain Procédé et dispositif statique de mélange de fluides
DE1262491B (de) * 1962-02-27 1968-03-07 Heinrichtung Koppers Ges Mit B Brennereinrichtung zur Beheizung turmartiger Regenerativ-Gas- oder Winderhitzer
DE3505940A1 (de) * 1985-02-21 1986-08-21 Krupp Koppers GmbH, 4300 Essen Keramischer brenner, insbesondere fuer winderhitzer
EP0260736A1 (fr) * 1986-09-16 1988-03-23 Hoogovens Groep B.V. Procédé pour mélanger deux ou plusieurs courants de gaz

Also Published As

Publication number Publication date
DE3915704A1 (de) 1990-11-15
JPH02306008A (ja) 1990-12-19
FI902246A0 (fi) 1990-05-04
AU633088B2 (en) 1993-01-21
AU5499890A (en) 1990-11-15
US5033958A (en) 1991-07-23

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