CN208204996U - A kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus - Google Patents
A kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus Download PDFInfo
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- CN208204996U CN208204996U CN201820482999.1U CN201820482999U CN208204996U CN 208204996 U CN208204996 U CN 208204996U CN 201820482999 U CN201820482999 U CN 201820482999U CN 208204996 U CN208204996 U CN 208204996U
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Abstract
A kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus, the utility model relates to a kind of burners of natural gas, and in particular to a kind of natural gas premix burner.The problem of it is poor that it solves natural gas premixed combustion flame holding, and tempering, detonation easily occurs and puts out.It includes premixed natural gas pipeline, flaring connecting pipe, jet pipe row, cooling medium entrance header and cooling medium outlet header, the square tube that the jet pipe row is arranged in a row by N root parallel vertical or the round tube with parallel side rib form, jet pipe is arranged in flaring connecting pipe air outlet, and the side rib of square tube or round tube forms slit spout；It further includes smooth combustion apparatus, smooth combustion apparatus is made of the oval shape tube that parallel vertical is arranged in a row, the oval shape tube of smooth combustion apparatus corresponds to jet pipe and arranges the slit spout to be formed, the windward side of the ellipse shape tube is ellipsoid, its lower end and upper end is connected to cooling medium entrance header and cooling medium outlet header respectively.
Description
Technical field
The utility model relates to a kind of burners of natural gas, and in particular to a kind of natural gas premix burner.
Background technique
Natural gas sulfur content is low, calorific value is high, the thermal efficiency is high, is generally recognised as the non-renewable energy of economic environmental protection in the world.Although such as
This, the nitrogen oxides that combustion of natural gas generates is one of the major pollutants in atmosphere, can form acid rain and haze, harmful to human
Health and environment.In recent years, country has put into effect a series of discharge of laws and regulations and mandatory standard limitation nitrogen oxides in succession.
" thermal power plant atmosphere pollutants emission standards " (GB 13223-2011) is to the emission limit of the nitrogen oxides of gas fired-boiler
100mg/m3, on May 13rd, 2015, Beijing issued " emission standard of air pollutants for boilers " (DB11/139-2015), rule
Determine from April 1st, 2017, creating gas fired-boiler emission limits of nitrogen oxides is 30mg/m3.Country and local regulation are to nitrogen oxygen
Compound emission request is increasingly strict, and the discharged nitrous oxides that combustion of natural gas generates will reach emission request, it is necessary to use low nitrogen
Combustion technology.
Existing natural gas boiler mostly uses diffusion combustion mode, natural gas and air to burn in mixing, spreads mixing
Speed and Process flowchart the speed and process of diffusion combustion.Gas diffusion combustion flame stability is good, is not tempered, but
Discharged nitrous oxides are higher, can be reduced to 80mg/m using discharged nitrous oxides after grading combustion technology3.Control nitrogen oxidation
Object is emitted on 30mg/m3Hereinafter, flue gas recirculating technique, higher cost must be used simultaneously.Fractional combustion and flue gas recirculation
Technology can make burning tend to be unstable, increase incomplete combustion loss and boiler exhaust heat loss.
Natural gas premixed combustion technology is a kind of low-NO_x combustion technology, and natural gas and air fill by a certain percentage before burning
Point mixing, compares diffusion combustion, and the efficiency of combustion of premixed combustion is higher under same reaction conditions, discharged nitrous oxides are lower, can
To meet discharged nitrous oxides lower than 30mg/m3Requirement.Industrial burner outlet pre-mixing gas combustion speed is generally much higher than fire
Flame propagation velocity is easy to happen de- fire, puts out, and is easy to happen tempering, detonation in igniting, blowing out and underload.
Utility model content
The purpose of the utility model is to provide a kind of natural gas premixed combustions with oval shape tube pipe row's smooth combustion apparatus
Device is easy to happen tempering, detonation and puts out to solve the problem of that natural gas premixed combustion flame holding is poor.
To achieve the above object, the technical scheme adopted by the utility model is that: it includes premixed natural gas pipeline 1, flaring
Connecting pipe 2, jet pipe row 3, cooling medium entrance header 4 and cooling medium outlet header 5, the jet pipe row 3 are put down by N root
The square tube that row is arranged in a row vertically or the round tube composition with parallel side rib, the lower end and cooling medium entrance header of square tube or round tube
The upper end of 4 connections, square tube or round tube is connected to cooling medium outlet header 5, and the jet pipe row 3 is arranged in flaring connecting pipe
In 2 air outlets, the side rib of N root square tube or N root round tube forms N-1 slit spout；
It further includes smooth combustion apparatus 6, and smooth combustion apparatus 6 is made of the oval shape tube that N-1 root parallel vertical is arranged in a row, institute
Every oval shape tube for stating smooth combustion apparatus 6 corresponds to the slit spout that jet pipe row 3 is formed, and the ellipse shape tube is met
Wind face is ellipsoid, and the leeward of oval shape tube is the plane perpendicular to transverse direction, the oval external ellipse of shape tube
The extended line of long axis direction be overlapped with the middle line in slit width of jet direction, oval shape tube lower end and cooling medium entrance collection
Case 4 is connected to, and oval shape tube upper end is connected to cooling medium outlet header 5.
The beneficial effect of the utility model compared with the existing technology is: jet pipe mining water cooling or air-cooled square tube or band
The round tube of parallel side rib, jet pipe arrange the quenching distance that the slit width of jet to be formed is less than premixed natural gas burning, can be to prevent
Only tempering, detonation occur for premixed natural gas.Premixed natural gas is after slit spout, the oval shape tube pipe of the steady flame device of flow-disturbing
Row is formed about boundary layer in oval shape tube outer tube wall, is generated the lower area of air velocity due to the effect of gas viscosity power
Domain meets the condition for stablizing burning, while oval shape tube leeward is plane, compares elliptical tube, oval shape tube leeward
Bigger airflow reflux area can be formed, is conducive to volume and inhales high-temperature flue gas heating premixed natural gas, further enhance burning
Stability.Oval shape tube aerodynamic characteristic is good, streams that resistance is low, and heat transfer perimeter is long, is conducive to conduct heat.Oval shape tube uses water
It is cold or air-cooled, it is ensured that the temperature of combustion zone is no more than 1500 DEG C, realizes low-nitrogen oxide discharging.The utility model it is natural
The applicable load range of gas premix burner is wide, can guarantee flameholding under 12%-100% load, not be tempered and blow
It puts out, the discharged nitrous oxides of natural gas premix burner are lower than 30mg/m3, minimum reachable 8mg/m3, burner resistance is smaller, tool
There is good application prospect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model, and Fig. 2 is the A-A cross-sectional view of Fig. 1, and Fig. 3 is the B-B cross-sectional view of Fig. 1,
Fig. 4 is the combustion process schematic illustration of the utility model, and Fig. 5 is the segmentation slit spout schematic diagram of embodiment two, and Fig. 6 is
The structural schematic diagram of embodiment four, Fig. 7 are the M-M cross-sectional views of Fig. 6, and Fig. 8 is the structural schematic diagram of embodiment five.
Specific embodiment
Specific embodiment 1: illustrating present embodiment below with reference to Fig. 1 to Fig. 4.Present embodiment includes premix
Natural gas line 1, flaring connecting pipe 2, jet pipe row 3, cooling medium entrance header 4, cooling medium outlet header 5 and steady combustion
Device 6, the jet pipe row 3 are made of the square tube that N root parallel vertical is arranged in a row, the lower end of square tube and cooling medium entrance collection
Case 4 is connected to, and the upper end of square tube is connected to cooling medium outlet header 5, and the jet pipe row 3 is arranged in flaring connecting pipe 2 and goes out
On gas port, N root square tube forms N-1 slit spout.Select N for 5-40 according to burner rating；The side of the square tube outer wall
A length of 20-38mm；Jet pipe row's height is 300-1500mm；The slit width of jet b is 1.0-2.0mm；Slit spout
Premixed natural gas muzzle velocity is 4-35m/s.
Smooth combustion apparatus 6 is made of the oval shape tube that N-1 root parallel vertical is arranged in a row, oval shape tube height and spout
Pipe row's height is equal, and the oval shape tube of every of the smooth combustion apparatus 6 corresponds to the slit spout that jet pipe row 3 is formed, institute
The windward side for stating oval shape tube is ellipsoid, and the leeward of oval shape tube is the plane perpendicular to transverse direction；Institute
The extended line for stating the external elliptical long axis direction of oval shape tube is overlapped with the middle line in slit width of jet direction, oval shape tube
Lower end be connected to cooling medium entrance header 4, the upper end of oval shape tube is connected to cooling medium outlet header 5.It is described ellipse
The external elliptical long axis direction length of circle shape tube and short-axis direction length ratio are 1.4-2, and oval shape tube is external elliptical
Long axis direction length is 23-64mm, and short-axis direction length is 16-32mm；The planar outer walls 6-1 of the ellipse shape tube is away from ellipse
Shape tube windward side outside wall surface end-point distances are the external elliptical long axis direction length of 1/2-3/4；The ellipse shape tube is windward
Face outside wall surface endpoint is 5-9mm away from slit spout outlet distance c, and the minimum spacing e between the oval exclusive wall surface of shape tube pipe is
3-8mm；
Cooling medium enters the square tube of jet pipe row 3 and the ellipse abnormal shape of smooth combustion apparatus 6 through cooling medium entrance header 4
Pipe, is drawn by cooling medium outlet header 5.When using water as cooling medium, the square tube in-pipe flow speed of jet pipe row 3 and steady combustion dress
The oval shape tube in-pipe flow speed for setting 6 is 0.3m/s to 1.5m/s, when using air as cooling medium, the square tube of jet pipe row 3
The oval shape tube velocity in pipes of velocity in pipes and smooth combustion apparatus 6 is 15m/s to 50m/s.Cooling medium is outer circulation, is used to add
Heat boiler water supply or external heat supply.
Specific embodiment 2: illustrating present embodiment below with reference to Fig. 5.Present embodiment and embodiment one
It is a difference in that the multiple rectangular metal sheets 7 of welding in each slit spout of the jet pipe row 3, the height g of rectangular metal sheet 7
For 3-4mm, thickness is equal to slit width of jet, and width is equal to slit spout depth.Rectangular metal sheet 7 is in slit spout side
Upward spaced set.Jet pipe is arranged the slit spout to be formed and is divided into multiple rectangular jets, rectangular jet by rectangular metal sheet 7
Height f is 20-40mm.
Slit spout is divided into multiple rectangular jets, the depth-width ratio of premixed natural gas jet stream is reduced, improves jet stream
Rigidity, improves the uniformity of slit spout Velocity Profiles and the uniformity of burning, while reducing cutting for burner region
Face thermic load, is conducive to low nitrogen burning.
Specific embodiment 3: present embodiment and embodiment one are a difference in that: it further includes circumferential rib 16, surely
Multiple circumferential ribs 16 are set on the oval special-shaped tube outer surface of each of combustion device 6, multiple circumferential ribs 16 are along oval shape tube
Short transverse is evenly arranged, and spacing is 20-50mm.The fin height 2-3mm of circumferential rib 16, fin thickness 2-3mm.Flame punching
Brush circumferential rib 16, circumferential rib can strengthen the heat exchange of oval shape tube, reduce the temperature of flame.Simultaneously because gas viscosity power
Effect forms flow boundary layer in the near wall of circumferential rib, and air velocity is low, is conducive to surely fire.
Specific embodiment 4: illustrating present embodiment below with reference to Fig. 6 and Fig. 7.Present embodiment and embodiment party
Formula two is a difference in that: it further includes circumferential rib 16, is arranged on the oval special-shaped tube outer surface of each of smooth combustion apparatus 6 multiple
Circumferential rib 16, the intermediate cross-section of each 16 thickness direction of circumferential rib and rectangular metal sheet 7 divide the rectangle spray that slit spout is formed
The intermediate cross-section in open height direction is in same plane.The fin height 2-3mm of circumferential rib 16, fin thickness 2-3mm.
Since each circumferential rib 16 is against the intermediate cross-section of rectangular jet short transverse, flame impingement circumferential rib 16, ring
Shape rib can strengthen the heat exchange of oval shape tube, reduce the temperature of flame.Because gas viscosity is in the near wall shape of circumferential rib
At flow boundary layer, air velocity is low, is conducive to surely fire.
Specific embodiment 5: illustrating present embodiment below with reference to Fig. 8.Present embodiment and embodiment one
It is a difference in that the jet pipe row 3 is made of the round tube with parallel side rib that N root parallel vertical is arranged in a row, the round tube
Lower end is connected to cooling medium entrance header 4, and the upper end of institute's round tube is connected to cooling medium outlet header 5, the jet pipe row 3
It is arranged in 2 air outlet of flaring connecting pipe, the parallel sides rib of N root round tube forms N-1 slit spout；Outside the round tube
Diameter is 18-32mm；The parallel side rib of the round tube is contour with round tube and is arranged symmetrically, outside the midpoint of parallel side rib inner wall and round tube
Wall connection, parallel side rib with a thickness of 1-3mm, the length Y of parallel side rib is equal with round tube outer diameter.
In contrast to square tube, round tube can bear bigger pressure, and the range of choice of cooling working medium pressure parameter is bigger.
Embodiment 1:
As shown in Figure 1-3, present embodiment include premixed natural gas pipeline 1, flaring connecting pipe 2, jet pipe row 3, it is cold
But medium inlet header 4, cooling medium outlet header 5 and smooth combustion apparatus 6, the jet pipe row 3 are lined up by 15 parallel verticals
The square tube of one row forms, and the lower end of square tube is connected to cooling medium entrance header 4, the upper end of square tube and cooling medium outlet header
5 connections, the jet pipe row 3 are arranged in 2 air outlet of flaring connecting pipe, and 15 square tubes form 14 slit spouts, institute
The side length for stating square tube outer wall is 25mm, and the slit width of jet b is 1.5mm；Jet pipe row's height is 676mm.
Smooth combustion apparatus 6 is made of the oval shape tube that 14 parallel verticals are arranged in a row, and every of the smooth combustion apparatus 6 is ellipse
Circle shape tube corresponds to the slit spout that jet pipe row 3 is formed, and the windward side of the ellipse shape tube is ellipsoid, oval different
The leeward of type pipe be perpendicular to transverse direction plane, the extended line of the oval external elliptical long axis direction of shape tube with
The middle line in slit width of jet direction is overlapped, and the lower end of oval shape tube is connected to cooling medium entrance header 4, oval shape tube
Upper end be connected to cooling medium outlet header 5.The length in the external transverse direction of the ellipse shape tube is 38mm, short axle
The length in direction is 22.5mm, and long axis direction length and short-axis direction length ratio are 1.69, the plane of the ellipse shape tube
Outer wall 6-1 is 26mm away from oval shape tube windward side outside wall surface end-point distances；Water cooling ellipse shape tube windward side outside wall surface
Endpoint is 7mm away from slit spout outlet distance c, and the minimum spacing e between the oval exclusive wall surface of shape tube pipe is 4mm.
Cooling water enters the square tube of jet pipe row 3 and the oval shape tube of smooth combustion apparatus 6 through cooling medium entrance header 4,
It is drawn by cooling medium outlet header 5, in the square tube in-pipe flow speed of jet pipe row 3 and the oval shape tube pipe of smooth combustion apparatus 6
Water flow velocity is 1m/s, and cooling water is outer circulation, is used to heating boiler feed water.
For smooth combustion apparatus using oval shape tube, oval shape tube aerodynamic characteristic is good in the present embodiment, and it is low to stream resistance, heat transfer
Zhou Bianchang is conducive to control ignition temperature.The external elliptical long axis direction length of oval shape tube and short-axis direction length ratio
It is 1.69, the planar outer walls 6-1 of oval shape tube is 26mm away from oval shape tube windward side outside wall surface end-point distances, can be taken into account
Flow resistance and heat transfer, and guarantee the stabilization of burning.It is the ginseng that 1.5mm is optimization that jet pipe, which arranges the slit width of jet b to be formed,
Number, slit width of jet is too small, and the requirement to manufacture processing is higher, and the effluxvelocity of slit spout is more under identical gas quantity
Height will increase combustion noise, the excessive possibility that will increase premixed natural gas and be tempered of slit width of jet.The burner exists
It may be implemented to stablize burning under 15%-100% load, tempering do not occur and puts out, discharged nitrous oxides 16-27mg/m3。
Embodiment 2:
As shown in figure 5, the difference of the present embodiment and embodiment 1 is only that in each slit spout of the jet pipe row 3
Throat thickness is 1.5mm, width 25mm, 19 rectangular metal sheets 7 that height g is 4mm, the rectangle gold in each slit spout
Belong to 7 spaced set of piece.Jet pipe is arranged each slit spout to be formed and is divided into 20 rectangular jets, square by rectangular metal sheet 7
Shape spout f is 30mm.
Slit spout is divided into multiple rectangular jets, the depth-width ratio of premixed natural gas jet stream is reduced, improves jet stream
Rigidity, improve may be implemented to stablize burning under slit spray 12%-100% load, and tempering does not occur and puts out, discharged nitrous oxides
For 13-25mg/m3。
Embodiment 3:
As shown in Figure 6 and Figure 7, the difference of the present embodiment and embodiment 2 is only that the oval shape tube of each of smooth combustion apparatus 6
Multiple circumferential ribs 16 are all set on outer surface, and the intermediate cross-section of each 16 thickness direction of circumferential rib is divided narrow with rectangular metal sheet 7
The short transverse intermediate cross-section for the rectangular jet that spout is formed is stitched in same plane.The fin height 3mm of circumferential rib 16, fin are thick
Spend 2mm.
Since each circumferential rib 16 is against rectangular jet center, flame impingement circumferential rib 16 can enhanced heat exchange, reduce
The temperature of flame.Simultaneously because gas viscosity ring rib is formed about flow boundary layer, air velocity is low, is conducive to surely fire.The combustion
Burner may be implemented to stablize burning under 12%-100% load, and tempering does not occur and puts out, discharged nitrous oxides 8-19mg/
m3。
Embodiment 4:
The difference of the present embodiment and embodiment 1 is only that cooling medium is air, and air is situated between after being pressurizeed by blower by cooling
Matter entrance header 4 flows through the square tube of jet pipe row 3 and the oval shape tube of smooth combustion apparatus 6, is drawn by cooling medium outlet header 5
Out, the square tube velocity in pipes of jet pipe row 3 and the oval shape tube velocity in pipes of smooth combustion apparatus 6 are 40m/s.
The present embodiment is cooling using air, and the round tube of jet pipe row and the round tube overpressure of smooth combustion apparatus are lower, flowing
Resistance is small, and there is no the in-tube fouling problems that may cause using water cooling.The burner can be real under 15%-100% load
Now stable burning does not occur tempering and puts out, discharged nitrous oxides 22-30mg/m3。
Embodiment 5:
As shown in figure 8, the difference of the present embodiment and embodiment 1 is only that jet pipe row 3 is arranged in a row by N root parallel vertical
The round tube composition with parallel side rib, the lower end of round tube is connected to cooling medium entrance header 4, the upper end of round tube and cooling medium
Outlet header 5 is connected to, and the jet pipe row 3 is arranged in 2 air outlet of flaring connecting pipe.
The round tube outer diameter of the jet pipe row 3 is 22mm；The parallel side rib of the round tube is contour with round tube and is arranged symmetrically,
The midpoint of parallel side rib inner wall is connect with circular tube external wall, and fin is 22mm with a thickness of 1.5mm, fin length Y.It is cold in the round tube
But water pressure can be higher than 0.7MPa.Jet pipe mining round tube in the present embodiment, in contrast to square tube, round tube can bear bigger
Pressure, the range of choice of cooling working medium pressure parameter is bigger.The burner may be implemented to stablize under 15%-100% load
Burning does not occur tempering and puts out, discharged nitrous oxides 12-25mg/m3.
Claims (9)
1. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus, it includes premixed natural gas pipeline
(1), flaring connecting pipe (2), jet pipe row (3), cooling medium entrance header (4) and cooling medium outlet header (5), it is described
The square tube that jet pipe row (3) is arranged in a row by N root parallel vertical or the round tube with parallel side rib form, the lower end of square tube or round tube
It is connected to cooling medium entrance header (4), the upper end of square tube or round tube is connected to cooling medium outlet header (5), the spout
Pipe row (3) is arranged in flaring connecting pipe (2) air outlet, and the side rib of N root square tube or N root round tube forms N-1 slit spray
Mouthful；
It is characterized in that it further includes smooth combustion apparatus (6), smooth combustion apparatus (6) is different by the ellipse that N-1 root parallel vertical is arranged in a row
Type pipe composition, the oval shape tube of every of the smooth combustion apparatus (6) correspond to the slit spout that jet pipe row (3) is formed, institute
The extended line for stating the long axis direction of oval shape tube is overlapped with the middle line in slit width of jet direction, the ellipse shape tube lower end
It is connected to cooling medium entrance header (4), oval shape tube upper end is connected to cooling medium outlet header (5)；
The jet pipe row is equal with the oval height of shape tube, is 300-1500mm；N is 5-40, the width of the slit spout
Degree b is 1.0-2.0mm.
2. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus according to claim 1,
The outer wall side length for being characterized in that the square tube of the jet pipe row (3) is 20-38mm.
3. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus according to claim 1,
The round tube outer diameter with parallel side rib for being characterized in that the jet pipe row (3) is 18-32mm, parallel side rib and round tube of round tube etc.
High and be arranged symmetrically, the midpoint of parallel side rib inner wall is connect with circular tube external wall, parallel side rib with a thickness of 1-3mm, parallel side rib
Length Y it is equal with round tube outer diameter.
4. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus according to claim 1,
It is characterized in that the external elliptical long axis direction length of the oval shape tube and short-axis direction length ratio is 1.4-2, it is oval different
The external elliptical long axis direction length of type pipe is 23-64mm, and short-axis direction length is 16-32mm；The ellipse shape tube is put down
Face outer wall (6-1) is 1/2-3/4 times of external elliptical long axis direction length away from oval shape tube windward side outside wall surface end-point distances；
The windward side outside wall surface endpoint of the ellipse shape tube is 5-9mm, the oval exclusive wall of shape tube pipe away from slit spout outlet distance c
Minimum range e between face is 3-8mm.
5. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus according to claim 1,
It is characterized in that the multiple rectangular metal sheets (7) of welding, the rectangular metal sheet in each slit spout of the jet pipe row (3)
(7) height g is 3-4mm, thickness is equal to the width of slit spout, width is equal to the depth of slit spout；The rectangular metal
Piece (7) spaced set on slit spout direction；Jet pipe is arranged each slit to be formed by the rectangular metal sheet (7)
Spout is divided into multiple rectangular jets, and rectangular jet height f is 20-40mm.
6. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus according to claim 3,
Be characterized in that jet pipe row (3) the round tube outer diameter with parallel side rib be 22mm, side rib with a thickness of 1.5mm；The round tube
The width b for the slit spout that parallel sides rib is formed is 1.5mm.
7. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus according to claim 4,
It is characterized in that the oval external elliptical long axis direction length of shape tube is 38mm, short-axis direction length is 22.5mm, long axis
Direction length and short-axis direction length ratio are 1.69, and the planar outer walls (6-1) of the ellipse shape tube are met away from oval shape tube
Wind face outside wall surface end-point distances are 26mm；The elliptical distance c of the pipe windward side outside wall surface endpoint away from slit spout outlet be
7mm, the oval exclusive wall surface minimum spacing e of shape tube pipe are 4mm.
8. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus according to claim 1,
It is characterized in that it further includes circumferential rib (16), multiple annulars is set on the oval special-shaped tube outer surface of each of smooth combustion apparatus (6)
Rib (16), circumferential rib (16) are evenly arranged along oval shape tube short transverse, spacing 20-50mm；The fin of circumferential rib (16)
Height 2-3mm, fin thickness 2-3mm.
9. a kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus according to claim 5,
It is characterized in that it further includes circumferential rib (16), multiple annulars are arranged in the outer surface of each of smooth combustion apparatus (6) ellipse shape tube
The rectangle that rib (16), the thickness direction intermediate cross-section of each circumferential rib (16) and rectangular metal sheet (7) segmentation slit spout are formed
The intermediate cross-section in spout direction is in same plane；The fin height 2-3mm of circumferential rib (16), fin thickness 2-3mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317512A (en) * | 2018-04-04 | 2018-07-24 | 哈尔滨工大金涛科技股份有限公司 | A kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317512A (en) * | 2018-04-04 | 2018-07-24 | 哈尔滨工大金涛科技股份有限公司 | A kind of natural gas premix burner with oval shape tube pipe row's smooth combustion apparatus |
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