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WO2011022847A1 - Brûleur servant à produire un flux de gaz chaud - Google Patents

Brûleur servant à produire un flux de gaz chaud Download PDF

Info

Publication number
WO2011022847A1
WO2011022847A1 PCT/CH2009/000287 CH2009000287W WO2011022847A1 WO 2011022847 A1 WO2011022847 A1 WO 2011022847A1 CH 2009000287 W CH2009000287 W CH 2009000287W WO 2011022847 A1 WO2011022847 A1 WO 2011022847A1
Authority
WO
WIPO (PCT)
Prior art keywords
burner
injectors
air
flow channel
flow
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.)
Ceased
Application number
PCT/CH2009/000287
Other languages
German (de)
English (en)
Inventor
Philippe Maeder
Matthias Bobst
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.)
Ammann Schweiz AG
Original Assignee
Ammann Schweiz 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 Ammann Schweiz AG filed Critical Ammann Schweiz AG
Priority to PCT/CH2009/000287 priority Critical patent/WO2011022847A1/fr
Publication of WO2011022847A1 publication Critical patent/WO2011022847A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F23D11/36—Details
    • F23D11/40—Mixing tubes; Burner heads
    • F23D11/402—Mixing chambers downstream of the nozzle
    • 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
    • F23D11/001—Spraying nozzle combined with forced draft fan in one unit
    • 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
    • F23D11/36—Details
    • F23D11/38—Nozzles; Cleaning devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2210/00—Noise abatement
    • F23D2210/101—Noise abatement using noise dampening material

Definitions

  • the invention relates to a burner for generating a hot gas stream, and a H thoroughlygaserzeu- ger with the burner according to the preambles of the independent claims.
  • burners fired by fossil fuels are generally used, in which the fuel is finely distributed and burned in a stream of combustion air.
  • a blower driven by electrical energy is usually used, which, depending on size and power, forms a not inconsiderable proportion of the investment and operating costs of such a burner.
  • This task is done by the burner and the
  • the invention relates in a first aspect to a preferably suitable for heavy oil burner for generating a hot gas stream for heating or drying purposes.
  • the burner comprises a burner jacket and has injectors which are supplied with forced air during normal operation of the burner and suck in fresh air from the environment via one or more suction openings in the burner jacket. During operation, this fresh air mixes within the burner with the blower air expanded via the injectors and is then supplied to the combustion zone.
  • the burner is designed such that the outlet openings of the injectors are covered by the burner jacket, ie are hidden behind the burner jacket in a side view of the burner.
  • Such burners according to the invention have significantly lower noise emissions compared with the burners known from the state of the art for the same performance and economic efficiency.
  • the intake openings of the burner jacket are of a single covering device, preferably of a circumferential collar, or of several individual covering devices, For example, individual hood-shaped covers, hidden, so that they are hidden in a side view of the burner behind the cover or the. This makes it possible to achieve a further reduction in noise emissions.
  • the covering devices are designed in such a way that the intake ambient air, on its way to the outlet openings of the injectors, experiences a deflection of more than 90 °, in particular of approximately 180 °, since this favors a further reduction of the noise emissions.
  • these covering devices be provided with a sound-absorbing lining, whereby a large part of the sound generated by the ejectors when the air blows out is intercepted.
  • the burner jacket limits a flow channel with an annular cross-section for transporting the fresh air drawn in to the combustion zone, in which a plurality of injectors protrude in the direction of flow.
  • the burner jacket forms the outer boundary of an annular flow channel for the combustion air flow formed by the expanded air blown through the injectors and the ambient air sucked in via the suction openings.
  • the injectors relative to the circular ring cross-section of the flow channel, enter the flow channel circumferentially uniformly distributed.
  • This design favors the creation of a uniform stable combustion air flow in the flow channel and at the outlet and allows at the same time a cooling of the burner jacket with this air flow in a structurally simple construction of the burner. It is further preferred that the injectors are arranged on two concentric pitch circles In ⁇ , preferably having offset circumferential positions, as this a more even inflow of the blower expanded air is possible in the flow channel.
  • the burner jacket has a substantially circumferentially circumferential suction opening, i. an intake opening which extends over the entire circumference of the burner jacket and is interrupted at most by narrow webs or ribs.
  • a suction opening has low pressure losses when flowing through is therefore conducive to good efficiency of the burner.
  • the burner is designed such that the outlet openings of the injectors, as seen in the flow direction, are arranged at at least two different axial positions. This ensures a stable air flow even with relatively long flow channels.
  • those injectors whose outlet openings are arranged upstream on top are fed from a plenum with fan air, while the injectors whose outlet openings are arranged downstream of the aforementioned injectors, fed from a flow channel, which also from the collecting space is supplied with forced air and in which combustion air flows during operation to the combustion zone.
  • the inlet openings of the injectors fed from the flow channel are arranged in the flow channel in such a way that part of the kinetic flow energy of the combustion air flow flowing in this flow channel is converted into pressure energy for expansion in the injectors.
  • the burner has concentrically arranged, preferably annular exit cross-sections for a fuel-carrying air flow and combustion air and is designed such that the outermost of the concentric outlet cross-sections is fed in operation with the intake via the injectors fresh air , As a result, a sheath flow of combustion air is placed around the fuel-carrying flow in operation, which is conducive to a stable combustion zone and complete combustion.
  • a second aspect of the invention relates to a hot gas generator having a
  • Combustion chamber which forms a combustion chamber into which a burner according to the first aspect of the invention opens, such that the combustion chamber in operation surrounds the combustion zone.
  • Hot gas generator has this a plurality of preferably identical burner according to the first aspect of the invention, which open into the combustion chamber, wherein it is further preferred that these on identical axia- len positions with respect to the flow direction of the hot gas generated during operation with the hot gas generator open into the furnace.
  • hot gas generators according to the invention having virtually any heating power can be provided with a burner size.
  • FIG. 1 is a perspective top view obliquely from above of a heavy oil burner according to the invention
  • FIG. 2 shows a vertical section through the heavy oil burner from FIG. 1; FIG. and
  • FIGS. 1 and 2 shows a perspective sectional view through the burner arrangement of the burner from FIGS. 1 and 2.
  • FIGS. 1 and 2 A preferred embodiment of the burner according to the invention in the form of a heavy oil burner 1 is shown in FIGS. 1 and 2, once in a perspective plan view and once in a vertical section.
  • the burner basically consists of a single-stage radial fan 2 for providing the combustion air and a burner assembly 3, which are screwed together.
  • Fig. 2 in conjunction with Fig. 3, which shows the burner assembly 3 in perspective in section, can be seen in the center of the
  • Burner assembly 3 a burner lance 4, at the burner exit side or Verbrennungsennungszonen wornem end a nozzle body 5 with nozzle holes (not shown) is arranged. At its other end, the burner lance 4 is connected to a supply line 20 for heavy oil. Within the burner lance 4, a central bore is present. the one which connects the supply line 20 with the nozzle body 5.
  • the burner lance 4 is coaxially surrounded by a first tube 6, which in the region of the outlet of the nozzle bores from the nozzle body 5 has an insert 7, which tapers the tube cross-section in this area.
  • a first annular flow channel 8 is formed, which has its smallest flow cross-section in the region of the outlet of the nozzle holes from the nozzle body 5 and a first Throttle valve 9 is connectable to the outlet side of the blower 2.
  • a spiral guide plate 10 Upstream of the nozzle body 5 in the first flow channel 8 is a spiral guide plate 10, which imparts a twist to the air flowing during operation through the flow channel 8 before it enters the region of the flow channel 8 bounded by the insert 7.
  • the baffle 10 is supported by the burner lance 4 and is firmly connected thereto.
  • the first tube 6 is coaxially surrounded by a second tube 12, which in turn is coaxially surrounded by a third tube 16, which has a nozzle-like insert 19 in the region of its burner outlet end.
  • the insert 19 tapers the tube cross-section in this area towards the burner outlet-side end first suddenly and then steadily increasing.
  • a second annular flow channel 17 for combustion air is formed between the second tube 12 with the nozzle ring 14 and the third tube 16 with the insert 19, a second annular flow channel 17 for combustion air is formed.
  • This second flow channel 17 is connected via a second throttle valve 18 with the outlet side of the blower 2.
  • the insert 19 surrounds the first tube 6 with the insert 7 arranged therein in the area of the outlet-side end of the insert 7 and delimits the in this region between it and the nozzle ring 14 formed second flow channel 17 such that in operation emerging from the second flow channel 17
  • the third tube 16 is coaxially surrounded by a fourth tube 21, which here forms the claimed burner jacket. Between the third tube 16 and the fourth tube 21, a third annular flow channel 22 is formed.
  • the fourth tube 21 surrounds the third tube 16 in the region of the outlet end of the same such that during operation the exiting from the third flow channel 22 air flow L an envelope flow around the third tube 16 and thus from the second flow channel 17 exiting air flow V forms.
  • the third flow channel 22 is connected via a plurality of injector tubes 23 with a collecting space 25 for combustion air, which is connectable via the second throttle valve 18 with the pressure side of the blower 2.
  • the injector tubes 23 are distributed uniformly over the circumference of the transverse section of the third flow channel 22 on two concentric pitch circles with offset circumferential positions.
  • the fourth tube 21 has a circumferentially substantially circumferential suction opening 24 which connects the third flow channel 22 surrounded by this tube 21 and the outlet sides of the injector tubes 23 to the environment.
  • the intake opening 24 is dimensioned such that the fourth tube 21 covers the outlets of the injector tubes 23, so these are hidden in the side view under the fourth tube 21.
  • Downstream of the aforementioned Injektorrohre 23 opens a variety of other injectors 30 in the third flow channel 22, which branch off combustion air from the second flow channel 17 and expand into the third flow channel 22, creating an injector in the third flow channel 22.
  • These injector tubes 30 are uniformly distributed over the circumference of the third flow channel 22. As can also be seen, they branch off the extracted combustion air from the second flow channel 17 at an angle of approximately 40 ° to the flow direction of this flow channel, so that in operation part of the existing flow energy is converted into pressure energy for expansion.
  • the suction opening 24 is covered by a circumferential collar 29 (sophisticated covering device), such that the suction opening 24 is hidden behind the collar 29 in a side view of the burner.
  • a circumferential collar 29 covering device
  • the burner lance 4 is supplied via a fuel pump (not shown) heavy oil, which is then injected via the nozzle bores of the nozzle body 5 in the first flow channel 8.
  • air is supplied from the blower 2 to the first flow channel 8 via the first throttle valve 9 and a first plenum 26 and the second flow channel 17 via the second throttle valve 18 and a second plenum 25.
  • the air flowing in the first flow channel 8 passes through the region in which the spiral baffle 10 is arranged, and then enters as a swirl flow in the region in which the heavy oil is injected via the nozzle bores of the nozzle body 5 in the first flow channel 8. She tears the injected heavy oil with it and then enters as air flow Z with finely divided Schwerölteil ⁇ chen from the insert 7 of the first tube 6 from, to then be burned in the adjoining the burner outlet combustion zone.
  • the guided in the second flow channel 17 combustion air is divided into two partial streams.
  • the first partial flow is expanded via the injector tubes 30 into the third flow channel 22, while the second partial flow enters in the region of the outlet-side end of the second flow channel 17 into a swirl body 27 arranged there, which it leaves as swirl flow.
  • the second partial flow enters the nozzle-shaped insert 19, which forms the outlet-side end of the second flow channel 17. He then leaves this as a spirally rotating flow, which forms a sheath flow of combustion air V to the air flow Z exiting from the insert 7 and thus from the first flow channel 8 with the atomized heavy oil contained therein.
  • a subset of the amount of combustion air V entering the second plenum 25 via the second throttle valve 18 is expanded via the injector tubes 23 into the third flow channel 22.
  • fresh air from the environment is drawn into the third flow channel 22 through the injector effect generated by these injector tubes 23 and injector tubes 30 via the downstream injector tubes 30, which then mixes with the air expanded via the injectors 23, 30 and in the third flow channel 23 continues to flow.
  • this air flow passes through an arrangement of guide ribs 28 before it emerges therefrom, thereby forming a straight-lined envelope flow Z around the spiral envelope flow of combustion air V emerging from the second flow channel 17.
  • the burner 1 can also be operated with a fuel gas. ben.
  • a further annular flow channel 13 is formed between the first tube 6 and the second tube 12, which opens into a nozzle ring 14 on the burner outlet side and is connected at its other end to a fuel gas feed line 15. Via this further flow channel 13, fuel gas can be conducted from the fuel gas supply 15 to the nozzle ring 14, for injecting the fuel gas into the combustion zone.
  • the throttle valves 9, 18 can be adjusted individually such that a desired flame pattern is obtained, optionally with additional adjustment of the axial position of the burner lance 4 and the amount of fuel supplied. If an operation with fuel gas takes place, the supplied fuel gas amount can be adjusted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Of Fluid Fuel (AREA)

Abstract

L'invention concerne un brûleur (1) servant à produire un flux de gaz chaud à des fins de chauffage, ledit brûleur (1) présentant une enveloppe (21) et des injecteurs (23, 30) qui sont alimentés en air soufflé, en cas de fonctionnement conforme aux spécifications, et qui aspirent l'air frais ambiant par l'intermédiaire d'une ou de plusieurs ouvertures d'aspiration (24) situées dans l'enveloppe (21) du brûleur, l'air frais étant acheminé à la zone de combustion, à l'intérieur du brûleur (1). Les ouvertures de sortie des injecteurs (23, 30) sont recouvertes par l'enveloppe (21) du brûleur. Les émissions sonores des brûleurs (1) selon l'invention sont nettement inférieures à celles des brûleurs génériques connus de l'art antérieur, à puissance et rentabilité égales.
PCT/CH2009/000287 2009-08-26 2009-08-26 Brûleur servant à produire un flux de gaz chaud Ceased WO2011022847A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CH2009/000287 WO2011022847A1 (fr) 2009-08-26 2009-08-26 Brûleur servant à produire un flux de gaz chaud

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2009/000287 WO2011022847A1 (fr) 2009-08-26 2009-08-26 Brûleur servant à produire un flux de gaz chaud

Publications (1)

Publication Number Publication Date
WO2011022847A1 true WO2011022847A1 (fr) 2011-03-03

Family

ID=42173796

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2009/000287 Ceased WO2011022847A1 (fr) 2009-08-26 2009-08-26 Brûleur servant à produire un flux de gaz chaud

Country Status (1)

Country Link
WO (1) WO2011022847A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105402731A (zh) * 2015-12-31 2016-03-16 天津泰丰兴业科技有限公司 一种新型节能环保燃烧机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986201A (en) * 1930-03-12 1935-01-01 Lyman C Huff Method of effecting combustion of fluid fuel
US4045157A (en) * 1976-04-30 1977-08-30 American Can Company Silencer device for industrial burners
DE3040830A1 (de) * 1980-10-30 1982-05-13 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur verminderung der no(pfeil abwaerts)x(pfeil abwaerts) -emission
DE3821526A1 (de) * 1988-06-25 1989-12-28 May Michael G Verfahren und einrichtung zur verbrennung von brennstoff
EP0684428A2 (fr) * 1994-05-24 1995-11-29 E.E.T. UMWELT- und GASTECHNIK GmbH Dispositif pour l'injection d'air dans l'espace de combustion d'un brûleur de torche et brûleur de torche

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986201A (en) * 1930-03-12 1935-01-01 Lyman C Huff Method of effecting combustion of fluid fuel
US4045157A (en) * 1976-04-30 1977-08-30 American Can Company Silencer device for industrial burners
DE3040830A1 (de) * 1980-10-30 1982-05-13 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur verminderung der no(pfeil abwaerts)x(pfeil abwaerts) -emission
DE3821526A1 (de) * 1988-06-25 1989-12-28 May Michael G Verfahren und einrichtung zur verbrennung von brennstoff
EP0684428A2 (fr) * 1994-05-24 1995-11-29 E.E.T. UMWELT- und GASTECHNIK GmbH Dispositif pour l'injection d'air dans l'espace de combustion d'un brûleur de torche et brûleur de torche

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105402731A (zh) * 2015-12-31 2016-03-16 天津泰丰兴业科技有限公司 一种新型节能环保燃烧机

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