CN106895400A - A kind of central flame flame based on full premix metallic fiber burns head and burner - Google Patents
A kind of central flame flame based on full premix metallic fiber burns head and burner Download PDFInfo
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- CN106895400A CN106895400A CN201710158976.5A CN201710158976A CN106895400A CN 106895400 A CN106895400 A CN 106895400A CN 201710158976 A CN201710158976 A CN 201710158976A CN 106895400 A CN106895400 A CN 106895400A
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- flame
- premixer
- head
- combustion
- air
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- 229920000914 Metallic fiber Polymers 0.000 title claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 82
- 239000002184 metal Substances 0.000 claims abstract description 49
- 229910052751 metal Inorganic materials 0.000 claims abstract description 49
- 239000000567 combustion gas Substances 0.000 claims abstract description 44
- 239000002737 fuel gas Substances 0.000 claims abstract description 23
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 206010020843 Hyperthermia Diseases 0.000 abstract description 6
- 230000036031 hyperthermia Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 150000002739 metals Chemical class 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 12
- 238000002156 mixing Methods 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 241001075561 Fioria Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
-
- 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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- 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
- F23D14/68—Treating the combustion air or gas, e.g. by filtering, or moistening
-
- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/725—Protection against flame failure by using flame detection devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
Head and burner are burnt the present invention relates to a kind of central flame flame based on full premix metallic fiber, the burning head includes burning head body, embedded first combustion zone in burning head body front end, the outer surface laying metal web of first combustion zone；The burner includes blower fan, premixer and burns head, and the air outlet of the blower fan is connected with the rear end of premixer；The front end of the premixer is connected with head is burnt, and the premixer is internally provided with fire rod and distributing ring, and the distributing ring is connected with the fuel gas inlet of premixer's sidewall bottom.Burning head of the invention had both had the advantages that conventional metals fiber burnt head, it may have central flame flame burns the advantage of head, it is adaptable to the elongated plain cylindrical furnace of burner hearth and central flame flame boiler；Burner of the invention is provided with distributing ring, air and combustion gas is sufficiently mixed before combustion, makes burning highly stable, and uniformity of temperature profile there is no localized hyperthermia, therefore inhibit the generation of NOx.
Description
Technical field
The present invention relates to technical field of combustion equipment, more particularly to a kind of central flame flame based on full premix metallic fiber burns
Head and burner.
Background technology
At present in Boiler Manufacturing Enterprise, for central flame flame boiler, its burner ends is enclosed construction, is usually adopted
Diffusion type combustion head is used, the flame of diffusion type combustion head is the first backhaul；In the flame afterburnt, flue gas is turned back along Inner Wall of Combustion Chamber
Front smoke box is returned, the second backhaul is formed；Afterwards, smoke pipe is entered back into, the 3rd backhaul is formed, as shown in Figure 1.But use diffusion type combustion
Head is burnt, because substantial amounts of nitrogen in air and oxygen catalytic can be formed nitrogen oxides by the presence of localized hyperthermia, nitrogen oxides
Discharge has very serious pollution to air.The metal fiber burner for occurring in recent years is a kind of fully premixed combustion device, with spy
Kind of metallic fiber is used as combustion head so that fuel gas buring is sufficiently stable and uniformity of temperature profile, there is no localized hyperthermia, because
This inhibits the generation of NOx.But for central flame flame boiler, if continuing to use standard metal fiber burns head, such as Fig. 2 institutes
Show, then due to the special construction of burner hearth, the resistance of burner hearth depths is much larger than preceding end resistance, therefore the metallic fiber of standard burns
Head, flame will be only possible to be burnt in front portion, and the most areas of burner hearth are wasted, and directly use the burning head of the structure, it is impossible to
Solve central flame flame boiler reduction NOXThe requirement of discharge.
The content of the invention
In order to solve the problems, such as that standard metal fiber combustion head can not very well adapt to central flame flame boiler, the invention provides
A kind of central flame flame based on full premix metallic fiber burns head and burner, and the central flame flame burns head not only to be had and diffusion type
The similar flue gas flow direction of burner, moreover it is possible to overcome the defect of diffusion flame burner nitrogen oxides high, and do not influence boiler efficiency with
Exert oneself.
The technical scheme that the present invention takes is as follows：
A kind of central flame flame based on full premix metallic fiber burns head, including burns head body, in the burning head body front end
Embedding burning structure, the burning structure forms the first combustion zone that central flame flame burns head, the outer surface of first combustion zone
Laying metal web.
Traditional metallic fiber burns head, and flame is in Metal Fibre Combustion, then due to the special construction of burner hearth, burner hearth depth
The resistance at place be much larger than preceding end resistance, therefore standard metallic fiber combustion head, flame will be only possible to front portion burn, burner hearth
Most areas are wasted, and directly use the burning head of the structure, it is impossible to solve the low NO of central flame flame boilerXThe requirement of discharge.
Central flame flame of the invention burns head by embedded first combustion zone in front end for burning head body, forming central flame flame structure, flame
It is distributed in inside burning head, forms axial flame；The outer surface of first combustion zone is equipped with metal web, air and combustion gas
Mixed gas Metal Fibre Combustion layer in uniformly pass through so that burn head burn sufficiently stable, uniformity of temperature profile, do not have
With the presence of localized hyperthermia, therefore inhibit the generation of NOx.The present invention had both had the advantages that conventional metals fiber burnt head, it may have
Central flame flame burns the advantage of head, but simultaneously again weakens both, it is adaptable to the elongated plain cylindrical furnace of burner hearth and central flame flame boiler.
Further, first combustion zone is the cylinder or flared structure of front opening, when the described first burning
When area is flared structure, the rear end area of first combustion zone is less than its front end area.
Specifically, when first combustion zone is cylindrical structural, heat energy distribution evenly, but with certain thermo-lag
Property；When first combustion zone is flared structure, without hysteresis.
Further, when first combustion zone is cylindrical structural, the metal web is compact texture；Work as institute
When stating the first combustion zone for flared structure, the metal web is un-densified structure.
Specifically, when first combustion zone is cylindrical structural, metal web compact structure, the metal of compactness is fine
Dimension burning head is higher to the quality requirement of combustion gas and air, and combustion pressure is bigger, and the distance that can be sprayed is longer；First burning
When area is flared structure, the relatively round cylindricality of metallic fiber web frame is sparse, and the quality requirement to combustion gas and air is more cylindrical low,
Combustion pressure is small, but due to the flared structure of its own, also can guarantee that its jet length can meet needs.
Further, when first combustion zone is flared structure, the outer surface laying metal of the burning head body
Fleece, forms the second combustion zone that central flame flame burns head.
Specifically, when first combustion zone is cylindrical structural, metal is not laid in the outer surface of the burning head body
Fleece, only in cylindrical combustion zone internal-combustion, flame is axial flame to flame, is adapted to short burner hearth；When the described first burning
When area is flared structure, metal web is also laid in the outer surface of burning head body, and the is formed head body outer surface is burnt
Two combustion zones, flame is burning the burning simultaneously of this inside and outside of head, and similar standard metal fiber burning head is formed to burn burnt outside head body
Radial direction flame, form axial flame burning to be burnt in head body, be adapted to burner hearth long because when using burner hearth long, radially fire
Flame can wash away front furnace, and axial flame can wash away rear hearth.
Further, the metal web be made up of Aludirome material and with burn head body sinter into one it is whole
Body, the fibre diameter of the metal web is 40-50 μm.
Specifically, the present invention is formed using the good Aludirome material sintering of heat resistance, the metal web
Fibre diameter is set to 40-50 μm, can meet the requirement of high-temp combustion.
Another aspect of the present invention provides a kind of central flame flame burner based on full premix metallic fiber, including above-mentioned
Central flame flame burns head, blower fan and premixer, and the air outlet of the blower fan is connected with the rear end of premixer；The front end of the premixer
Head rear end is burnt with central flame flame to be connected, the premixer is internally provided with fire rod and distributing ring, and described fire rod one end is located at
Premixer front end, the other end sequentially passes through premixer rear end, head body and the first combustion zone is burnt, positioned at the gold in the first combustion zone
Category fleece outside；The distributing ring is connected with the fuel gas inlet of premixer's sidewall bottom, and combustion gas is entered by the fuel gas inlet
Premixer, is uniformly sent forth by the distributing ring, is mixed with the air in the premixer, mixed combustion gas and air
The first combustion zone of head is burnt into central flame flame and in metal web surface combustion.
Another aspect of the present invention is provided includes that above-mentioned central flame flame burns the burner of head, and the burner is in premixer
Distributing ring is provided with, air and combustion gas is sufficiently mixed before combustion, the air and combustion gas after being sufficiently mixed are fine in metal
Uniformly spread in dimension table face so that highly stable, uniformity of temperature profile of burning, there is no localized hyperthermia, therefore inhibit
Therefore the generation of NOx is inhibited, and because being mixed with enough air supplies in advance, therefore the discharge capacity of CO is also very low.
Further, the distributing ring includes connecting tube, jet pipe and mixed air blade,
The connecting tube is the L-shaped structure of one end open one end closing, and openend and the fuel gas inlet of the connecting tube are supported
Connect, connecting tube is connected with gas pipeline, the blind end of the connecting tube is connected by rotating shaft with mixed air blade；
The jet pipe is set to multiple, and the horizontal segment around connecting tube is uniformly distributed, in the jet pipe is generally aligned in the same plane,
The plane is vertical with connecting tube horizontal segment, parallel with plane where mixed air blade, one end of each jet pipe and connecting tube
Connection, other end closing；The side wall of each jet pipe is provided with least one bar hole, and combustion gas is via connecting tube from the bar shaped
Hole ejects；
The mixed air blade sets at least to two, is uniformly distributed in the plane perpendicular with connecting tube horizontal segment, empty
Gas enters premixer under fan action, blows the mixed air blade and rotates, and air and combustion gas is mixed in premixer.
Specifically, the jet pipe is arranged in connecting tube, the jet pipe can be bolted or the mode welded and company
Adapter connection, because the connecting tube is L-shaped structure, the horizontal segment of the connecting tube is axially in parallel with premixer, the jet pipe
In the plane perpendicular with connecting tube horizontal segment, therefore the side that bar hole of the combustion gas through connecting tube from jet pipe is ejected
To being the direction perpendicular with the axial direction of premixer, and air is parallel with the axial direction of premixer into the direction of premixer
Direction, therefore air and combustion gas flow direction are vertical, mixing is more uniformly distributed；Mixed air blade is connected by rotating shaft with connecting tube blind end,
The rotation of the mixed air blade is blown by air, the mixing of air and combustion gas is made in the case where mixed air blade is rotated evenly and fully；
The vertical section and fuel gas inlet of the connecting tube are abutted, i.e., connecting tube is directly sitting at fuel gas inlet, connecting tube and fuel gas inlet
Connection and need not be very tight because combustion gas will finally enter premixer, a small amount of combustion gas be revealed from fuel gas inlet
To premixer considerable influence will not be produced to mixing.
Further, the side wall of each jet pipe is provided with multiple bar holes, and the bar hole is asymmetric to be arranged at jet pipe
Both sides, i.e. the bar shaped number of perforations of each jet pipe both sides, and each described jet pipe and adjacent lance are in opposite side
Bar shaped number of perforations.
Specifically, asymmetric mode, such as the one of each jet pipe are taken in distribution of the bar hole in each jet pipe both sides
Side opens up 4 bar holes, and opposite side opens up 2 bar holes, and each jet pipe opens up 4 sides of bar hole and opened up with adjacent lance
The sides correspondence of 2 bar holes, is arranged so as to so that combustion gas is ejected by connecting tube into the bar hole of jet pipe, due to being
The unsymmetrical arrangement of 2 pairs 4, carries out mixed once between two jet pipes after fuel gas injection, form one around connecting tube horizontal segment
The gas burning face of axial direction, the air from premixer axially rushes at this gas burning face, is sufficiently mixed with combustion gas, then is rotated through mixed fan leaf
Combustion gas and air is set to mix again, it is ensured that air and combustion gas are blended in absolute uniform in premixer.
Further, the mixed air blade be fan-shaped, trapezoidal, arc surfaced, triangle, strip, square, polygonal or
Irregular shape, preferably trapezoidal, strip and arc surfaced.
Further, also including carrying out filtered air filter, the air cleaner to the air for entering premixer
It is connected with the air inlet of blower fan.
Specifically, due to containing the impurity such as particulate matter in air so that due to the presence of impurity in air in combustion process
And metallic fiber combustion head is blocked, therefore the present invention is provided with air cleaner, in air into first carrying out before premixer
Filter.The air cleaner is generally cylindrical, easy to disassemble, and inside is skeleton, and outside is woven wire filtration core, filtration core
The structure folded using aspect, it is ensured that air is fully contacted with woven wire filtration core；Woven wire filtration core is using more
Rotating fields, filtering mesh is 50-60 mesh, so both can guarantee that air was fully filtered, big in making filtering mesh not by air again
Particle is blocked.
Further, also including controller, regulating valve, fiery check bar and alarm, the regulating valve is arranged at gas inlet
On pipeline, it is electrically connected with the controller, the regulating valve controls to enter the gas quantity of premixer by controller；The fiery check bar with
Fire rod be arranged in parallel, and one end is located at the rear end of premixer, and the other end sequentially passes through premixer rear end, burns head simultaneously with fire rod
Body and the first combustion zone, on the outside of the metal web in the first combustion zone, for detecting flame information, the fiery check bar
It is electrically connected with the controller, the controller and alarm are electrically connected, and the controller detects flame information control according to fiery check bar
Burner normally runs or is alarmed by alarm.
Specifically, the fiery check bar is used to detect the presence or absence of flame that, when there is flame, the fiery check bar to touch flame meeting
Electric current is produced, and delivers current to controller, normally run by controller control burner；When without flame, the fire inspection
Rod does not reach flame, it is impossible to produce electric current, the controller control burner is shut down, and controls alarm to be alarmed.
Further, the rear end for burning head body is provided with multiple sectors, and multiple sectors are in center
Symmetrical, the drift angle of multiple sectors collects and is fixed on disk, the curved edge of multiple sectors
It is fixed on the inwall for burning head body rear end.
Specifically, in order that air and combustion gas are burnt head body and taken a step forward mixing entering, in burning head body and premixer
Junction is provided with multiple sectors, and the sector can play a part of flow-disturbing.
Brief description of the drawings
Strile-back the burning schematic diagram of boiler matching diffusion type combustion head centered on Fig. 1；
Strile-back the burning schematic diagram of boiler matching standard metal fiber combustion head centered on Fig. 2；
Fig. 3 burns the structural representation of head for the central flame flame of one embodiment of the invention；
Fig. 4 burns the structural representation of head for the central flame flame of another embodiment of the present invention；
The boiler matching that strile-backd centered on Fig. 5 central flame flame of the invention burns the schematic diagram of head；
Fig. 6 is the structural representation of central flame flame burner of the invention, and arrow show combustion gas approach axis；
Fig. 7 is the side view of the central flame flame burner shown in Fig. 6；
Fig. 8 is the structural representation of distributing ring in the central flame flame burner shown in Fig. 6.
Description of reference numerals：1-blower fan；11-blower fan inner chamber；12-motor；2-premixer；3-burn head body；31—
First combustion zone；32-metal web；4-fuel gas inlet；5-air cleaner；6-connecting tube；61-connecting tube it is perpendicular
Straight section；The horizontal segment of 62-connecting tube；7-jet pipe；71-bar hole；8-mixed air blade；9-rotating shaft；10-controller；
20-fiery check bar；30-fire rod.
Specific embodiment
Principle of the invention and feature are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
Fig. 3 burns head for a kind of central flame flame based on full premix metallic fiber of one embodiment of the invention, including burns head sheet
Body 3, the embedded burning structure in the front end of burning head body 3, the burning structure forms the first combustion zone that central flame flame burns head
31, first combustion zone 31 is the cylindrical structural of front opening, the outer surface laying densification of first combustion zone 31
Metal web 32, the metal web 32 is made up of heat proof material Aludirome and sinters one into head body 3 is burnt
Overall, the fibre diameter of the metal web 32 is 40-50 μm.
In the present embodiment, metal web 32 is not laid in the outer surface for burning head body 3, and flame only fires in cylinder
Area's internal-combustion is burnt, flame is axial flame, is adapted to short burner hearth；And heat energy distribution is evenly, but with certain hysteresis.
In addition, the metal web of the present embodiment laying is compact texture, the fine and close structure of metal web 32 is to combustion gas and air
Quality requirement is higher, and combustion pressure is bigger, and the distance that can be sprayed is longer.
Fig. 4 burns head, the present embodiment for a kind of central flame flame based on full premix metallic fiber of another embodiment of the present invention
It is that the first combustion zone 31 is the flared structure of front opening with the difference of a upper embodiment, behind first combustion zone 31
End area is less than front end area, and the outer surface of first combustion zone 31 is equipped with un-densified metal web 32；The burning
Fine metal fleece 32 is also laid in the outer surface of head body 3, forms the second combustion zone.
In the present embodiment, metal web 32 is also laid in the outer surface for burning head body 3, is burning the appearance of head body 3
Face forms the second combustion zone that central flame flame burns head, and flame burns simultaneously inside and outside burning head body 3, burnt outside head body 3 being burnt
The radial direction flame that similar standard metal fiber burns head is formed, axial flame is formed burning in head body 3 is burnt, be adapted to burner hearth long,
Because when using burner hearth long, radial direction flame can wash away front furnace, axial flame can wash away rear hearth, and heat energy distribution
Uniformity is slightly worse compared with a upper embodiment, but without hysteresis.In addition, the metal web of the present embodiment laying is fine texture,
The mesh-density of fine texture is low compared with compact texture, the fine and closely woven structure of metal web 32 to the quality requirement of combustion gas and air compared with
Cylinder is low, and combustion pressure is small, but due to the flared structure of its own, also can guarantee that its jet length can meet need
Will.
Traditional metallic fiber burns head, flame in Metal Fibre Combustion, as shown in Fig. 2 then special due to burner hearth
Structure, the resistance of burner hearth depths is much larger than preceding end resistance, thus standard metallic fiber combustion head, flame will be only possible in front portion
Burning, the most areas of burner hearth are wasted, and directly use the burning head of the structure, it is impossible to solve the low NO of central flame flame boilerX
The requirement of discharge.Central flame flame of the invention burns head by embedded first combustion zone 31 in front end for burning head body 3, forming center
Strile-back structure, after burning and set up inside head axial flame, then combustion chamber is delivered to by blast, formed and common diffusion flame burner class
As flue gas flow direction, low NOx transformations of entirely appropriate central flame flame boiler, and do not influence boiler efficiency and to exert oneself, such as Fig. 5 institutes
Show.
Fig. 6 and Fig. 7 are the structural representation of central flame flame burner of the invention, including blower fan 1, premixer 2 and Fig. 3 institutes
The central flame flame for showing burns head, and the air outlet of the blower fan 1 is connected by flange with the rear end of the premixer 2, and the blower fan 1 has
There is blower fan inner chamber 11, the motor 12 of the blower fan 1 is arranged at the side of blower fan inner chamber 11；The front end of the premixer 2 passes through method
Blue to be connected with central flame flame burning head, the premixer 2 is internally provided with fire rod 30 and distributing ring, the fire rod 30 1
End is located at the front end of premixer 2, and the other end sequentially passes through the rear end of premixer 2, burns head body 3 and the first combustion zone 31, exposed the
The outer surface of metal web 32 of one combustion zone 31；The tubular structure that the premixer 2 is arranged horizontally, the tubular structure
Side wall is provided with fuel gas inlet directed downwardly 4, and the distributing ring is connected with fuel gas inlet 4, and combustion gas enters premixer by fuel gas inlet 4
After 2, uniformly sent forth by the distributing ring, be sufficiently mixed with the air in premixer 2, mixed combustion gas and air enter
Enter central flame flame and burn head, in the surface combustion of metal web 32.
In another embodiment, the rear end for burning head body 3 is provided with multiple sectors, multiple fan-shaped leaves
Piece is centrosymmetric distribution, and the drift angle of multiple sectors collects and is fixed on disk, multiple sectors
Curved edge is fixed on the inwall for burning the rear end of head body 3.The sector can play a part of flow-disturbing, make air and combustion
Gas burns head body 3 and takes a step forward mixing entering.
As shown in figure 8, the distributing ring includes connecting tube 6, jet pipe 7 and mixed air blade 8, the connecting tube 6 is to open one end
The L-shaped structure of mouth one end closing, the openend of the connecting tube 6 abuts with fuel gas inlet 4, makes the vertical section 61 of connecting tube and combustion
Feed channel is connected, and the blind end of the connecting tube 6 is connected by rotating shaft 9 with mixed air blade 8；The jet pipe 7 is set to 10, encloses
Horizontal segment 62 around connecting tube is uniformly distributed, and the jet pipe 7 is generally aligned in the same plane interior, the horizontal segment 62 of the plane and connecting tube
Vertically, parallel with the place plane of mixed air blade 8, one end of each jet pipe 7 connects with connecting tube 6, other end closing；Each
The side wall of the jet pipe 7 is provided with multiple bar holes 71, the asymmetric both sides for being arranged at jet pipe 7 of the bar hole 71, i.e. each institute
State the number of bar hole 71 of the both sides of jet pipe 7, and each described jet pipe 7 and adjacent lance 7 are in the bar hole 71 of opposite side
Number；In the implementation method shown in Fig. 8, the side of each jet pipe 7 opens up 4 bar holes 71, and opposite side opens up 2 bars
Shape hole 71, it is corresponding with the side that adjacent lance 7 opens up 2 bar holes 71 that each jet pipe 7 opens up 4 sides of bar hole 71, this
Sample is arranged such that combustion gas is ejected by connecting tube 6 into the bar hole 71 of jet pipe 7, due to being the unsymmetrical arrangement of 2 pairs 4,
Mixed once is carried out after fuel gas injection between two jet pipes 7, a gas burning face around the axial direction of horizontal segment 62 of connecting tube is formed,
Air from premixer 2 axially rushes at this gas burning face, is sufficiently mixed with combustion gas, then makes combustion gas and sky through the mixed rotation of air blade 8
Gas mixes again, it is ensured that air and combustion gas are blended in absolute uniform in premixer 2；
The mixed air blade 8 is set to 10, is uniformly distributed in the plane perpendicular with the horizontal segment 62 of connecting tube, empty
Gas enters premixer 2 under fan action, blows the mixed air blade 8 and rotates, and makes air and combustion gas that the is carried out in the premixer 2
Mixed once；In this embodiment, the jet pipe 7 is arranged in connecting tube 6, the jet pipe 7 can be bolted or
The mode of welding is connected with connecting tube 6, because the connecting tube 6 is L-shaped structure, the horizontal segment 62 of the connecting tube and premixer
2 is axially in parallel, and the jet pipe 7 is located in the plane perpendicular with the horizontal segment 62 of connecting tube, therefore combustion gas is through connecting tube 6 from spray
The direction that bar hole 71 on pipe 7 is ejected is the direction perpendicular with the axial direction of premixer 2, and air enters premixer 2
Direction be the direction parallel with the axial direction of premixer 2, therefore air and combustion gas flow direction are vertical, and mixing is more uniformly distributed；Mixed wind
Blade 8 is connected by rotating shaft 9 with the blind end of connecting tube 6, and the rotation of the mixed air blade 8 is blown by air, in 8 turns of mixed air blade
Make the mixing of air and combustion gas under dynamic evenly and fully；The vertical section 61 and fuel gas inlet 4 of the connecting tube are abutted, that is, connect
Pipe 6 is directly sitting at fuel gas inlet 4, and the connection of connecting tube 6 and fuel gas inlet 4 simultaneously need not be very tight, because combustion gas is final
To enter premixer 2, a small amount of combustion gas is leaked to premixer 2 from fuel gas inlet 4 and will not produce considerable influence to mixing.
In another embodiment, the distributing ring includes connecting tube 6, jet pipe 7 and mixed air blade 8, this embodiment party
Formula is that the mixed air blade 8 is maintained static with the difference of the implementation method shown in Fig. 8, and the mixed air blade 8 is by a connection
Axle is connected to the blind end of connecting tube 6, and the mixed air blade 8 only serves flow-disturbing effect.
The mixed air blade 8 is fan-shaped, trapezoidal, arc surfaced, triangle, strip, square, polygonal or irregular
Shape, in the embodiment shown in fig. 5, the mixed air blade 8 is trapezoidal.
As shown in fig. 7, the central flame flame burner also includes carrying out filtered air mistake to the air for entering premixer 2
Filter 5, the air cleaner 5 is arranged at the side corresponding with the motor 12 of blower fan, the air cleaner 5 and blower fan 1
Air inlet connection.Due to containing the impurity such as particulate matter in air so that due to the presence of impurity in air in combustion process
Metallic fiber combustion head is blocked, therefore the present invention is provided with air cleaner 5, in air into first carrying out before premixer 2
Filter.The air cleaner 5 is generally cylindrical, easy to disassemble, and inside is skeleton, and outside is woven wire filtration core, filtering
The structure that core is folded using aspect, it is ensured that air is fully contacted with woven wire filtration core；Woven wire filtration core is used
Sandwich construction, filtering mesh is 50-60 mesh, so both can guarantee that air is fully filtered, and made filtering mesh not by air again
Bulky grain is blocked.
In the implementation method shown in Fig. 6 and Fig. 7, also including controller 10, regulating valve, fiery check bar 20 and alarm, institute
State regulating valve to be arranged on gas inlet pipeline, electrically connected with controller 10, the regulating valve controls to enter by controller 10
The gas quantity of premixer 2；The fiery check bar 20 is set up in parallel with fire rod 30, for detecting flame information, the fiery check bar 20
One end is located at the rear end of premixer 2, and the other end sequentially passes through the rear end of premixer 2 together with fire rod 30, burns head body 3 and first
Combustion zone 31, the exposed outer surface of metal web 32 in the first combustion zone 31；The fiery check bar 20 is electrically connected with controller 10,
The controller 10 and alarm are electrically connected；When there is flame, the fiery check bar 20 touches flame and can produce electric current, and by electricity
Stream is delivered to controller 10, controls burner normally to run by controller 10；When without flame, the fiery check bar 20 is not reached
Flame, it is impossible to produce electric current, the control burner of the controller 10 is shut down, and controls alarm to be alarmed.
Burner of the invention makes air and combustion gas are sufficiently mixed before combustion by setting distributing ring, due to
Jet pipe 7 is provided with distributing ring so that gas outlet is uniform；Anisopleual setting bar hole 71, automatically forms on jet pipe 7
Combustion gas flow-disturbing；Mixed air blade 8 is additionally provided with distributing ring, the rotation of mixed air blade 8 ensures that air and combustion gas uniformly mix.Mixing
Uniform air and combustion gas are uniformly spread on the surface that metallic fiber burns head so that it is very steady that central flame flame burns head burning
Fixed, uniformity of temperature profile there is no localized hyperthermia, therefore inhibit the generation of NOx, and be supplied because being mixed with enough air in advance
Give, therefore the discharge capacity of CO is also very low.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of central flame flame based on full premix metallic fiber burns head, it is characterised in that including burning head body (3), the burning
The embedded burning structure in head body (3) front end, the burning structure forms the first combustion zone (31) that central flame flame burns head, described
Lay metal web (32) in the outer surface of the first combustion zone (31).
2. central flame flame according to claim 1 burns head, it is characterised in that first combustion zone (31) is front opening
Cylinder or flared structure, when first combustion zone (31) is for flared structure, first combustion zone (31)
Rear end area is less than its front end area.
3. central flame flame according to claim 2 burns head, it is characterised in that when first combustion zone (31) is tubaeform
During structure, metal web (32) is laid in the outer surface of burning head body (3), forms the second burning that central flame flame burns head
Area.
4. central flame flame according to claim any one of 1-3 burns head, it is characterised in that the metal web (32) by
Aludirome material is made and sinters an entirety, the fibre diameter of the metal web (32) into head body (3) is burnt
It is 40-50 μm.
5. it is a kind of based on the full central flame flame burner for premixing metallic fiber, it is characterised in that including claim any one of 1-4
Described central flame flame burns head, blower fan (1) and premixer (2), the air outlet of the blower fan (1) and the rear end company of premixer (2)
Connect；The front end of the premixer (2) and central flame flame burn head rear end and are connected, the premixer be internally provided with fire rod (30) and
Distributing ring, described fire rod (30) one end is located at premixer front end, and the other end sequentially passes through premixer rear end, burns head body (3)
With the first combustion zone (31), positioned in the first combustion zone (31) metal web (32) outside；The distributing ring and premixer
Fuel gas inlet (4) connection of sidewall bottom, combustion gas enters premixer by the fuel gas inlet (4), uniform by the distributing ring
Send forth, mixed with the air in the premixer, mixed combustion gas and air enter the first combustion that central flame flame burns head
Burn area (31) and in metal web (32) surface combustion.
6. central flame flame burner according to claim 5, it is characterised in that the distributing ring includes connecting tube (6), spray
Pipe (7) and mixed air blade (8),
The L-shaped structure that the connecting tube (6) is closed for one end open one end, the openend of the connecting tube (6) and fuel gas inlet
(4) abut, connecting tube (6) is connected with gas pipeline, the blind end of the connecting tube (6) passes through rotating shaft (9) and mixed air blade
(8) it is connected；
The jet pipe (7) is set to multiple, and the horizontal segment (62) around connecting tube is uniformly distributed, and the jet pipe (7) is positioned at same
In plane, the plane is vertical with the horizontal segment (62) of connecting tube, parallel with plane where mixed air blade (8), each described spray
The one end for managing (7) connects with connecting tube (6), other end closing；The side wall of each jet pipe (7) is provided with least one bar hole
(71), combustion gas is ejected via connecting tube (6) from the bar hole (71)；
The mixed air blade (8) sets at least to two, is uniformly distributed in the plane perpendicular with connecting tube horizontal segment (62),
Air enters premixer under blower fan (1) effect, blows the mixed air blade (8) and rotates, and makes air and combustion gas in premixer
Mixed.
7. central flame flame burner according to claim 6, it is characterised in that the side wall of each jet pipe (7) is provided with
Multiple bar holes (71), the asymmetric both sides for being arranged at jet pipe (7) of bar hole (71), each jet pipe (7) both sides
Bar hole (71) number, and each described jet pipe (7) and adjacent lance (7) opposite side bar hole (71) number not
Deng.
8. central flame flame burner according to claim 6, it is characterised in that the mixed air blade (8) is fan-shaped, ladder
Shape, arc surfaced, triangle, strip, square, polygonal or irregular shape.
9. whole pre-mixed metal fiber burner according to claim 5, it is characterised in that also including to entering premixer
Air carry out filtered air filter (5), the air cleaner (5) is connected with the air inlet of blower fan (1).
10. the central flame flame burner according to claim any one of 5-9, it is characterised in that also including controller (10),
Regulating valve, fiery check bar and alarm, the regulating valve is arranged on gas inlet pipeline, is electrically connected with controller (10), described
Regulating valve controls to enter the gas quantity of premixer (2) by controller (10)；The fiery check bar (20) is parallel with fire rod (30)
Set, one end is located at the rear end of premixer (2), and the other end is with fire rod (30) while sequentially passing through premixer rear end, burning head sheet
Body (3) and the first combustion zone (31), positioned at metal web (32) outside in the first combustion zone (31), for detecting that flame is believed
Breath, the fiery check bar (20) is electrically connected with controller (10), and the controller (10) and alarm are electrically connected, the controller
(10) the normal operation of flame information control burner is detected according to fiery check bar (20) or is alarmed by alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710158976.5A CN106895400A (en) | 2017-03-16 | 2017-03-16 | A kind of central flame flame based on full premix metallic fiber burns head and burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710158976.5A CN106895400A (en) | 2017-03-16 | 2017-03-16 | A kind of central flame flame based on full premix metallic fiber burns head and burner |
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| Publication Number | Publication Date |
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| CN106895400A true CN106895400A (en) | 2017-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710158976.5A Pending CN106895400A (en) | 2017-03-16 | 2017-03-16 | A kind of central flame flame based on full premix metallic fiber burns head and burner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300171A (en) * | 2017-07-06 | 2017-10-27 | 北京节能技术监测中心 | Burner is mixed before a kind of metallic fiber that head is burnt based on central flame flame |
| CN112556177A (en) * | 2020-11-19 | 2021-03-26 | 北新集团建材股份有限公司 | Hot-blast furnace and hot-blast system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003240214A (en) * | 2002-02-12 | 2003-08-27 | Universal Trading Kk | Portable gas burner |
| CN201028523Y (en) * | 2007-04-03 | 2008-02-27 | 武汉同强厨具设备有限公司 | Premixed energy-saving gas burner |
| CN106016261A (en) * | 2016-07-05 | 2016-10-12 | 中科蓝创节能环保设备（天津）有限公司 | Full-premix type metal fiber combustor and boiler adopting combustor |
| CN106196057A (en) * | 2016-08-26 | 2016-12-07 | 中能服能源科技股份有限公司 | A kind of novel low nitrogen oxide burner structure |
| CN206593100U (en) * | 2017-03-16 | 2017-10-27 | 北京节能技术监测中心 | A kind of central flame flame based on full premix metallic fiber burns head and burner |
-
2017
- 2017-03-16 CN CN201710158976.5A patent/CN106895400A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003240214A (en) * | 2002-02-12 | 2003-08-27 | Universal Trading Kk | Portable gas burner |
| CN201028523Y (en) * | 2007-04-03 | 2008-02-27 | 武汉同强厨具设备有限公司 | Premixed energy-saving gas burner |
| CN106016261A (en) * | 2016-07-05 | 2016-10-12 | 中科蓝创节能环保设备（天津）有限公司 | Full-premix type metal fiber combustor and boiler adopting combustor |
| CN106196057A (en) * | 2016-08-26 | 2016-12-07 | 中能服能源科技股份有限公司 | A kind of novel low nitrogen oxide burner structure |
| CN206593100U (en) * | 2017-03-16 | 2017-10-27 | 北京节能技术监测中心 | A kind of central flame flame based on full premix metallic fiber burns head and burner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300171A (en) * | 2017-07-06 | 2017-10-27 | 北京节能技术监测中心 | Burner is mixed before a kind of metallic fiber that head is burnt based on central flame flame |
| CN112556177A (en) * | 2020-11-19 | 2021-03-26 | 北新集团建材股份有限公司 | Hot-blast furnace and hot-blast system |
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Application publication date: 20170627 |
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