CN116398875A - Burner and boiler with air film air outlet - Google Patents

Burner and boiler with air film air outlet Download PDF

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Publication number
CN116398875A
CN116398875A CN202310512819.5A CN202310512819A CN116398875A CN 116398875 A CN116398875 A CN 116398875A CN 202310512819 A CN202310512819 A CN 202310512819A CN 116398875 A CN116398875 A CN 116398875A
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CN
China
Prior art keywords
air
film
outlet
wall surface
pipeline
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.)
Pending
Application number
CN202310512819.5A
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Chinese (zh)
Inventor
周凌宇
刘佳
刘辉
聂鑫
李振伟
陈江
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.)
Xian Thermal Power Research Institute Co Ltd
Huaneng Group Technology Innovation Center Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Huaneng Group Technology Innovation Center Co Ltd
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.)
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Publication date
Application filed by Xian Thermal Power Research Institute Co Ltd, Huaneng Group Technology Innovation Center Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN202310512819.5A priority Critical patent/CN116398875A/en
Publication of CN116398875A publication Critical patent/CN116398875A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08—Disposition of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • 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
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • 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
    • F23M5/00—Casings; Linings; Walls
    • F23M5/06—Crowns or roofs for combustion chambers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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

Abstract

The invention provides a combustor and a boiler with a gas film air outlet. The burner with the air film air outlet comprises: a fuel pipe extending in a first direction, one end of the fuel pipe being open so as to form a combustion port from which fuel in the fuel pipe can be ejected; the air film air duct is provided with an air film air outlet, the air film air outlet can spray air film air outwards, the air film air outlet is positioned on the periphery of the combustion duct, the air film air outlet is adjacent to the combustion opening in the first direction, the direction of the air film air outlet is in the second direction, and an included angle is formed between the first direction and the second direction. Therefore, the burner with the air film air outlet has the advantages of reducing the scouring and high-temperature corrosion of fuel and flue gas to the wall surface of the combustion boiler.

Description

Burner and boiler with air film air outlet
Technical Field
The invention relates to the technical field of burners, in particular to a burner and a boiler with a gas film air outlet.
Background
The coal-fired boiler burns coal powder in a hearth to release heat, and water cooling walls are arranged around the hearth to absorb heat and heat working media. The pulverized coal is carried by the primary air, enters the hearth through the burner, is mixed with the secondary air for providing oxygen auxiliary combustion, and releases heat. However, in actual situations, due to coal quality change and equipment defects, the phenomena of large deviation of wind speed and wind rate and uneven mixing in the furnace often exist in primary air and secondary air, so that coal dust carried by the primary air cannot be fully combusted, a wall is formed on the surface of the water-cooled wall, and abrasion and high-temperature corrosion of the surface of the water-cooled wall are caused.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, embodiments of the present invention provide a burner and boiler with a film wind outlet.
The burner with the air film air outlet comprises:
a fuel pipe extending in a first direction, one end of the fuel pipe being open so as to form a combustion port from which fuel in the fuel pipe can be ejected;
the air film air duct is provided with an air film air outlet, the air film air outlet can spray air film air outwards, the air film air outlet is positioned on the periphery of the combustion duct, the air film air outlet is adjacent to the combustion opening in the first direction, the direction of the air film air outlet is in the second direction, and an included angle is formed between the first direction and the second direction.
Therefore, the burner with the air film air outlet has the advantages of reducing the scouring and high-temperature corrosion of fuel and flue gas to the wall surface of the combustion boiler.
In some embodiments, the first direction is perpendicular to the second direction, the film wind outlet facing away from the fuel conduit in the second direction;
the plurality of air film air pipelines are arranged on the periphery of the fuel pipeline along the circumferential direction;
or the air film air pipeline is annularly arranged on the outer peripheral side of the fuel pipeline, and the fuel pipeline and the air film air pipeline define the air film air outlet.
In some embodiments, the plurality of air film wind outlets are arranged on the outer circumferential side of the fuel pipeline at intervals along the circumferential direction.
In some embodiments, the combustion conduit comprises
A primary air duct extending in the first direction, the primary air duct having a primary air outlet operable to eject fuel;
the secondary air pipeline extends along the first direction, the secondary air pipeline is provided with a secondary air outlet, the secondary air outlet is used for spraying secondary air, and the primary air outlet and the secondary air outlet form at least part of the fuel port.
In some embodiments, the secondary air pipeline is annularly arranged on the outer peripheral side of the primary air pipeline, the secondary air outlet is annular, and the secondary air outlet is annularly arranged on the outer peripheral side of the primary air outlet;
an ignition device is arranged in the primary air pipeline, and an ignition part of the ignition device is adjacent to the primary air outlet in the first direction.
In some embodiments, an end of the primary air duct is provided with an annular first diffuser, an inner wall surface of the first diffuser defining the primary air outlet, an inner diameter of the first diffuser increasing in the first direction in a direction away from the primary air duct;
the end part of the secondary air pipeline is provided with an annular second diffusion part, the secondary air outlet is defined by the inner wall surface of the second diffusion part and the outer wall surface of the first diffusion part, and the outer diameter of the first diffusion part and the inner diameter of the second diffusion part are increased along the direction away from the secondary air pipeline in the first direction.
In some embodiments, a central air duct is provided within the primary air duct, the central air duct having a central air outlet for ejecting a central air, the central air outlet forming part of the combustion port, the ignition device being located within the central air duct, an ignition portion of the ignition device being adjacent to the central air outlet in the first direction;
an air quantity adjusting device is arranged in the secondary air pipeline and is used for adjusting the through flow section in the secondary air pipeline.
In some embodiments, the overgrate air duct includes a tapered portion having an inner diameter that decreases in the first direction in a direction adjacent the overgrate air outlet;
the air quantity adjusting device comprises a secondary air baffle and a secondary air pull rod, the secondary air baffle is positioned in the conical part, the secondary air pull rod is connected with the secondary air baffle, and the secondary air pull rod can drive the secondary air baffle to move in the first direction so as to adjust the through flow section in the conical part;
the combustor with the air film air outlet comprises a secondary air supply pipeline, and an inlet of the central air pipeline and an inlet of the secondary air pipeline are communicated with the secondary air supply pipeline.
The burner with the air film air outlet comprises an air preheater, a coal mill and an air film air connecting pipe, wherein a first outlet of hot primary air of the air preheater is communicated with the primary air pipeline through the coal mill, and a second outlet of hot primary air of the air preheater is communicated with the air film air pipeline through the air film air connecting pipe.
The invention also provides a boiler, which comprises
The burner is provided with the air film air outlet;
the combustion chamber of the boiler body is provided with a first wall surface and a second wall surface which are oppositely arranged in a first direction;
the first wall surface is provided with a plurality of burners facing the second wall surface, the air film air outlets of the burners are adjacent to the first wall surface in the first direction, and the air film air outlets of the burners on the first wall surface are parallel to the first wall surface;
and/or the second wall surface is provided with a plurality of combustors facing the first wall surface, the air film air outlets of the combustors are adjacent to the second wall surface in the first direction, and the air film air outlets of the combustors on the second wall surface are parallel to the second wall surface.
Drawings
FIG. 1 is a schematic view of a combustor with a film wind outlet according to an embodiment of the present invention.
Fig. 2 is a schematic view of a first wall of a boiler according to an embodiment of the present invention.
Reference numerals:
a burner 100 having a film wind outlet;
a primary air duct 1, a primary air outlet 11, a first diffuser 12;
the secondary air pipe 2, a secondary air outlet 21, a second diffusion part 22, a conical part 23, a secondary air baffle 24, a secondary air pull rod 25 and a secondary air supply pipe 26;
a gas film wind pipe 3, a gas film wind outlet 31, and a gas film wind connecting pipe 32;
a central wind duct 4, a central wind outlet 41;
an ignition device 5, an ignition unit 51;
a first wall 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A burner 100 with a film wind outlet according to an embodiment of the present invention is described below with reference to the accompanying drawings. As shown in fig. 1 and 2, a burner 100 having a film wind outlet according to an embodiment of the present invention includes a fuel pipe and a film wind pipe 3.
The fuel pipe extends in a first direction, and one end of the fuel pipe is open so as to form a combustion port from which fuel in the fuel pipe can be ejected. The air film air duct 3 is provided with an air film air outlet 31, the air film air outlet 31 can spray air film air outwards, the air film air outlet 31 is positioned on the periphery of the combustion duct, the air film air outlet 31 is adjacent to the combustion port in the first direction, the air film air outlet 31 faces in the second direction, and an included angle is formed between the first direction and the second direction.
The burner 100 with the air film wind outlet according to the embodiment of the invention can enable the air film wind in the air film wind pipeline 3 to be sprayed out of the air film wind outlet 31 by arranging the air film wind pipeline 3 with the air film wind outlet 31, so that the air film wind forms a protective air film. And the air film air outlet 31 is located at the circumference of the combustion pipe, the air film air outlet 31 is adjacent to the combustion port in the first direction, the air film air outlet 31 is oriented in the second direction, and an included angle is formed between the first direction and the second direction. That is, the air film wind outlet 31 sprays air film wind outwardly at the circumferential side after combustion and forms a protective air film, so that the wall surface of the combustion boiler may be parallel to the second direction when the burner 100 having the air film wind outlet according to the embodiment of the present invention is mounted on the combustion boiler, so that the protective air film may prevent the fuel and the smoke from directly scouring the wall surface of the combustion boiler when the fuel (pulverized coal) cannot be sufficiently combusted and when the wall surface (water-cooled wall) of the combustion boiler is impacted, so that the fuel adhering to the wall surface of the combustion boiler is reduced, and thus the scouring and high-temperature corrosion of the fuel and the smoke to the wall surface of the combustion boiler may be reduced.
Therefore, the burner 100 with the air film air outlet according to the embodiment of the present invention has the advantage of reducing the scouring and high temperature corrosion of the combustion boiler wall surface by the fuel and the flue gas.
As shown in fig. 1 and 2, a burner 100 having a film wind outlet according to an embodiment of the present invention includes a fuel pipe and a film wind pipe 3.
The fuel pipe extends in a first direction, and one end of the fuel pipe is open so as to form a combustion port from which fuel in the fuel pipe can be ejected. In particular, the fuel in the fuel conduit may be pulverized coal. The first direction may be a front-to-back direction, which is indicated by an arrow in the figure. For example, the fuel pipe extends in the front-rear direction, and the front side of the fuel pipe is opened so as to form a combustion port.
As shown in fig. 1, in some embodiments, the combustion duct includes a primary air duct 1 and a secondary air duct 2.
The primary air duct 1 extends in a first direction, and the primary air duct 1 has a primary air outlet 11, and the primary air outlet 11 is operable to eject fuel and primary air. Specifically, fuel (pulverized coal) is ejected from the primary air outlet 11 with the primary air. For example, the primary air duct 1 extends in the front-rear direction, and the primary air outlet 11 is located at the front end portion of the primary air duct 1.
The secondary air duct 2 extends in the first direction, and the secondary air duct 2 has a secondary air outlet 21, the secondary air outlet 21 being for ejecting secondary air, the primary air outlet 11 and the secondary air outlet 21 constituting at least part of the fuel port. The secondary air is mixed with the primary air and fuel after being ejected from the secondary air outlet 21, thereby facilitating combustion. For example, the secondary air duct 2 extends in the front-rear direction, and the secondary air outlet 21 is located at the front end portion of the secondary air duct 2.
As shown in fig. 1, in some embodiments, the secondary air duct 2 is disposed around the outer peripheral side of the primary air duct 1, the secondary air outlet 21 is annular, and the secondary air outlet 21 is disposed around the outer peripheral side of the primary air outlet 11.
Specifically, the end of the primary air duct 1 is provided with an annular first diffuser portion 12, the inner wall surface of the first diffuser portion 12 defining the primary air outlet 11, the inner diameter of the first diffuser portion 12 increasing in a direction away from the primary air duct 1 in the first direction. This makes it possible to facilitate diffusion and combustion of the primary air and fuel after being discharged from the primary air outlet 11. For example, the first diffuser 12 is provided at the tip end portion of the primary air duct 1, and the inner diameter of the first diffuser 12 increases forward.
The end of the secondary air duct 2 is provided with an annular second diffuser 22, the inner wall surface of the second diffuser 22 and the outer wall surface of the first diffuser 12 defining a secondary air outlet 21, the outer diameter of the first diffuser 12 and the inner diameter of the second diffuser 22 increasing in a direction away from the secondary air duct 2 in a first direction. Thereby, the secondary air is discharged from the secondary air outlet 21, and then is easily diffused and mixed with the fuel. For example, the second diffuser 22 is provided at the tip end portion of the secondary air duct 2, and the outer diameter of the first diffuser 12 and the inner diameter of the second diffuser 22 increase forward. The outer wall surface of the first diffusion section 12 and the inner wall surface of the second diffusion section 22 are parallel.
As shown in fig. 1, in some embodiments, an ignition device 5 is provided within the primary air duct 1, and an ignition portion 51 of the ignition device 5 is adjacent to the primary air outlet 11 in the first direction. For example, the ignition portion 51 is located at the front end portion of the primary air duct 1, the ignition device 5 is an ignition oil gun, and the ignition portion 51 is an oil outlet of the ignition oil gun.
In some embodiments, a central wind duct 4 is provided within the primary wind duct 1, the central wind duct 4 having a central wind outlet 41, the central wind outlet 41 for ejecting central wind, the central wind outlet 41 forming part of a combustion port, an ignition device 5 being located within the central wind duct 4, an ignition portion 51 of the ignition device 5 being adjacent to the central wind outlet 41 in a first direction. Specifically, the central wind duct 4 extends in the first direction, and the central wind duct 4 is located at the central position of the primary wind duct 1. The central wind can be conveniently mixed with fuel and primary wind, and the ignition device can be cooled. For example, the center wind duct 4 extends in the front-rear direction, and the center wind outlet 41 is located at the front end portion of the center wind duct 4.
As shown in fig. 1, in some embodiments, the burner includes a secondary air supply duct 26, with both the inlet of the central air duct 4 and the inlet of the secondary air duct 2 being in communication with the secondary air supply duct 26. So that the secondary air supply duct 26 can supply air to the central air duct 4 and the secondary air duct 2, i.e. the air coming out from the central air outlet 41 is secondary air.
In some embodiments, an air volume adjusting device is arranged in the secondary air pipeline 2, and the air volume adjusting device is used for adjusting the through flow section in the secondary air pipeline 2. Specifically, the change in the through-flow cross section in the secondary air duct 2 can change the flow rate of the secondary air ejected from the secondary air outlet 21, so that the flow rate of the secondary air ejected from the secondary air outlet 21 can be adjusted. An increase in the through-flow cross section in the secondary air duct 2 increases the flow rate of the secondary air ejected from the secondary air outlet 21, and a decrease in the through-flow cross section in the secondary air duct 2 decreases the flow rate of the secondary air ejected from the secondary air outlet 21.
As shown in fig. 1, in some embodiments, the overgrate air duct 2 includes a tapered portion 23, the inner diameter of the tapered portion 23 decreasing in a first direction in a direction adjacent to the overgrate air outlet 21. For example, the inner diameter of the tapered portion 23 decreases forward.
The air quantity adjusting device comprises a secondary air baffle 24 and a secondary air pull rod 25, wherein the secondary air baffle 24 is positioned in the conical part 23, the secondary air pull rod 25 is connected with the secondary air baffle 24, and the secondary air pull rod 25 can drive the secondary air baffle 24 to move in a first direction so as to adjust the through flow section in the conical part 23. Specifically, the overgrate air baffle 24 has a blocking surface perpendicular to the first direction. In the first direction, the through-flow cross section in the tapered portion 23 decreases when the secondary air baffle 24 moves in a direction adjacent to the secondary air outlet 21, i.e., the through-flow cross section in the secondary air duct 2 decreases when the secondary air baffle 24 moves in a direction adjacent to the secondary air outlet 21; in the first direction, the through-flow cross section in the tapered portion 23 increases when the secondary air baffle 24 moves in a direction away from the secondary air outlet 21, that is, the through-flow cross section in the secondary air duct 2 increases when the secondary air baffle 24 moves in a direction away from the secondary air outlet 21. For example, the overgrate air baffle 24 is a ring-shaped member whose axial direction is the first direction (front-rear direction), and the outer diameter of the overgrate air baffle 24 decreases forward. The secondary air pull rod 25 can drive the secondary air baffle 24 to move in the front-rear direction, and the through-flow section in the conical part 23 can be reduced by moving the secondary air baffle 24 forwards.
As shown in fig. 1, the air film wind pipe 3 has an air film wind outlet 31, the air film wind outlet 31 can spray air film wind outwards, the air film wind outlet 31 is located at the circumference side of the combustion pipe, the air film wind outlet 31 is adjacent to the combustion port in a first direction, the air film wind outlet 31 is oriented in a second direction, and an included angle is formed between the first direction and the second direction. Specifically, the film air outlet 31 is located on the peripheral side of the secondary air duct 2 (secondary air outlet 21).
In some embodiments, as shown in fig. 1, the first direction is perpendicular to the second direction, and the film wind outlet 31 faces away from the fuel pipe in the second direction. Specifically, the second direction is the radial direction of the fuel pipe, and the air film wind outlet 31 ejects air film wind to the circumferential side of the fuel pipe to form a protective air film. The film air outlet 31 is located on the peripheral side of the secondary air duct 2 (secondary air outlet 21). The air film air outlet 31 faces away from the secondary air duct 2 (secondary air outlet 21).
As shown in fig. 1, in some embodiments, the number of the film wind pipes 3 is plural, and the plural film wind pipes 3 are provided on the circumferential side of the fuel pipe in the circumferential direction. Specifically, the plurality of air film air ducts 3 are provided circumferentially on the circumferential side of the secondary air duct 2, and the plurality of air film air outlets 31 are provided circumferentially on the circumferential side of the secondary air outlet 21.
In some embodiments, the film wind pipe 3 is disposed around the outer circumference of the fuel pipe, and the fuel pipe and the film wind pipe 3 define a film wind outlet 31. Specifically, the air film duct 3 is provided around the outer peripheral side of the secondary air duct 2, and the air film duct 3 and the secondary air duct 2 (second diffuser 22) define an air outlet film air outlet 31. The second diffuser 22 is provided with an annular plate having a thickness in the first direction at an end thereof remote from the secondary air duct 2 in the first direction. For example, the front end of the second diffusion portion 22 is provided with an annular plate having a thickness in the front-rear direction.
In some embodiments, the plurality of air film wind outlets 31 are provided, and the plurality of air film wind outlets 31 are disposed at intervals in the circumferential direction on the outer circumferential side of the fuel pipe. This makes it possible to increase the velocity of the air film wind ejected from the air film wind outlet 31. For example, a plurality of partitions are provided in the air film duct 3, and a plurality of air film air outlets 31 are partitioned. For example, eight air film air outlets 31 are provided on the outer peripheral side of each fuel pipe.
In some embodiments, the burner 100 with a film wind outlet according to the present invention includes an air preheater, a coal mill, and a film wind connection pipe 32, a first outlet of the air preheater hot primary wind is communicated with the primary wind pipe 1 through the coal mill, and a second outlet of the air preheater hot primary wind is communicated with the film wind pipe 3 through the film wind connection pipe 32. This makes it possible to make the gas ejected from the film wind outlet 31 hot primary wind. The hot primary air has larger wind force and is the original air supply device of the burner, thereby reducing the cost.
As shown in fig. 1 and 2, the present invention also proposes a boiler according to an embodiment of the present invention, which includes a burner and a boiler body.
The burner is a burner 100 with a film wind outlet according to an embodiment of the present invention. The combustion chamber of the boiler body has a first wall 6 and a second wall arranged opposite in a first direction.
The first wall surface 6 is provided with a plurality of burners facing the second wall surface, the air film air outlet 31 of the burners is adjacent to the first wall surface 6 in the first direction, and/or the second wall surface is provided with a plurality of burners facing the first wall surface 6, the air film air outlet 31 of the burners is adjacent to the second wall surface in the first direction and comprises:
a. the first wall 6 is provided with a plurality of burners facing the second wall, and the air film air outlet 31 of the burner is adjacent to the first wall 6 in the first direction. Specifically, the gas film wind outlet 31 of the burner on the first wall surface 6 is oriented parallel to the first wall surface 6. This allows the air film wind outlet 31 to blow out air film wind onto the first wall surface 6 and form a protective air film on the first wall surface 6, thereby reducing the flushing of the first wall surface 6 with fuel and smoke. For example, the burners 100 with air film wind outlets on the first wall 6 are arranged in a matrix.
b. The second wall is provided with a plurality of burners facing the first wall 6, and the air film air outlet 31 of the burner is adjacent to the second wall in the first direction. Specifically, the air film wind outlet 31 of the burner on the second wall surface is oriented parallel to the second wall surface. This allows the air film wind outlet 31 to blow out air film wind onto the second wall surface and form a protective air film on the first wall surface 6, thereby reducing the flushing of the second wall surface with fuel and smoke. For example, the burners 100 having the air film wind outlets on the second wall are arranged in a matrix.
c. The first wall surface 6 is provided with a plurality of burners facing the second wall surface, the air film air outlet 31 of the burners is adjacent to the first wall surface 6 in the first direction, the second wall surface is provided with a plurality of burners facing the first wall surface 6, and the air film air outlet 31 of the burners is adjacent to the second wall surface in the first direction.
According to the burner 100 with the air film air outlet, the original primary air is utilized in a distinguishing mode, one part of the primary air is still used as a conveying and carrying medium of the pulverized coal, the other part of the primary air is used as an air film and is tightly attached to and parallelly injected into the water-cooled wall (the first wall surface 6 and the second wall surface), and the surface of the water-cooled wall is protected. So as to improve the scouring of the air flow in the furnace to the water-cooled wall and the high-temperature corrosion of the flue gas to the water-cooled wall. And the water-cooled wall of the boiler does not need to be perforated again, the construction complexity is reduced, the blocking and burning loss of the nozzle are avoided, and meanwhile, the water-cooled wall area of the wall surface where the burner of the opposed combustion type boiler is located is effectively protected. The burner 100 is integrally formed during the manufacturing process, effectively improving the reliability of the apparatus and the operational flexibility.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (10)

1. A burner with a film wind outlet, comprising:
a fuel pipe extending in a first direction, one end of the fuel pipe being open so as to form a combustion port from which fuel in the fuel pipe can be ejected;
the air film air duct is provided with an air film air outlet, the air film air outlet can spray air film air outwards, the air film air outlet is positioned on the periphery of the combustion duct, the air film air outlet is adjacent to the combustion opening in the first direction, the direction of the air film air outlet is in the second direction, and an included angle is formed between the first direction and the second direction.
2. The burner with a film wind outlet according to claim 1, wherein,
the first direction is perpendicular to the second direction, and the air film air outlet is opposite to the fuel pipeline in the second direction;
the plurality of air film air pipelines are arranged on the periphery of the fuel pipeline along the circumferential direction;
or the air film air pipeline is annularly arranged on the outer peripheral side of the fuel pipeline, and the fuel pipeline and the air film air pipeline define the air film air outlet.
3. The burner with the air film wind outlet according to claim 2, wherein the air film wind outlets are plural, and the plural air film wind outlets are arranged on the outer peripheral side of the fuel pipe at intervals in the circumferential direction.
4. The burner with a film wind outlet of claim 2, wherein the combustion duct comprises a primary wind duct extending in the first direction, the primary wind duct having a primary wind outlet operable to eject fuel;
the secondary air pipeline extends along the first direction, the secondary air pipeline is provided with a secondary air outlet, the secondary air outlet is used for spraying secondary air, and the primary air outlet and the secondary air outlet form at least part of the fuel port.
5. The burner with a film wind outlet according to claim 4, wherein,
the secondary air pipeline is annularly arranged on the outer peripheral side of the primary air pipeline, the secondary air outlet is annular, and the secondary air outlet is annularly arranged on the outer peripheral side of the primary air outlet;
an ignition device is arranged in the primary air pipeline, and an ignition part of the ignition device is adjacent to the primary air outlet in the first direction.
6. The burner with a film wind outlet according to claim 5, wherein,
the end part of the primary air pipeline is provided with an annular first diffusion part, the inner wall surface of the first diffusion part defines the primary air outlet, and the inner diameter of the first diffusion part increases in the first direction along the direction away from the primary air pipeline;
the end part of the secondary air pipeline is provided with an annular second diffusion part, the secondary air outlet is defined by the inner wall surface of the second diffusion part and the outer wall surface of the first diffusion part, and the outer diameter of the first diffusion part and the inner diameter of the second diffusion part are increased along the direction away from the secondary air pipeline in the first direction.
7. The burner with a film wind outlet according to claim 5, wherein,
a central air duct is arranged in the primary air duct, the central air duct is provided with a central air outlet, the central air outlet is used for spraying central air, the central air outlet forms a part of the combustion port, the ignition device is positioned in the central air duct, and the ignition part of the ignition device is adjacent to the central air outlet in the first direction;
an air quantity adjusting device is arranged in the secondary air pipeline and is used for adjusting the through flow section in the secondary air pipeline.
8. The burner with a film wind outlet according to claim 7, wherein,
the secondary air duct includes a tapered portion having an inner diameter that decreases in the first direction in a direction adjacent to the secondary air outlet;
the air quantity adjusting device comprises a secondary air baffle and a secondary air pull rod, the secondary air baffle is positioned in the conical part, the secondary air pull rod is connected with the secondary air baffle, and the secondary air pull rod can drive the secondary air baffle to move in the first direction so as to adjust the through flow section in the conical part;
the combustor with the air film air outlet comprises a secondary air supply pipeline, and an inlet of the central air pipeline and an inlet of the secondary air pipeline are communicated with the secondary air supply pipeline.
9. The burner with a film wind outlet of claim 4, comprising an air preheater, a coal mill, and a film wind connection pipe, wherein a first outlet of the air preheater hot primary wind is in communication with the primary air duct through the coal mill, and a second outlet of the air preheater hot primary wind is in communication with the film wind duct through the film wind connection pipe.
10. A boiler, comprising
A burner according to any one of claims 1 to 9 having a film wind outlet;
the combustion chamber of the boiler body is provided with a first wall surface and a second wall surface which are oppositely arranged in a first direction;
the first wall surface is provided with a plurality of burners facing the second wall surface, the air film air outlets of the burners are adjacent to the first wall surface in the first direction, and the air film air outlets of the burners on the first wall surface are parallel to the first wall surface;
and/or the second wall surface is provided with a plurality of combustors facing the first wall surface, the air film air outlets of the combustors are adjacent to the second wall surface in the first direction, and the air film air outlets of the combustors on the second wall surface are parallel to the second wall surface.
CN202310512819.5A 2023-05-08 2023-05-08 Burner and boiler with air film air outlet Pending CN116398875A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310512819.5A CN116398875A (en) 2023-05-08 2023-05-08 Burner and boiler with air film air outlet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310512819.5A CN116398875A (en) 2023-05-08 2023-05-08 Burner and boiler with air film air outlet

Publications (1)

Publication Number Publication Date
CN116398875A true CN116398875A (en) 2023-07-07

Family

ID=87019884

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310512819.5A Pending CN116398875A (en) 2023-05-08 2023-05-08 Burner and boiler with air film air outlet

Country Status (1)

Country Link
CN (1) CN116398875A (en)

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