CN107036098B - A kind of multitube fuel gas mixing machine of monocline tubular type outlet - Google Patents
A kind of multitube fuel gas mixing machine of monocline tubular type outlet Download PDFInfo
- Publication number
- CN107036098B CN107036098B CN201710245724.6A CN201710245724A CN107036098B CN 107036098 B CN107036098 B CN 107036098B CN 201710245724 A CN201710245724 A CN 201710245724A CN 107036098 B CN107036098 B CN 107036098B
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- Prior art keywords
- fuel
- peripheral
- center
- monocline
- multitube
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/007—Mixing tubes, air supply regulation
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
- Nozzles (AREA)
Abstract
The present invention provides a kind of multitube fuel gas mixing machine of monocline tubular type outlet, including shell, center fuel passage, peripheral fuel channel and annular air channel are radially coaxially arranged in the shell；The center fuel passage includes center fuel delivery pipe, and is connected to the central fuel nozzle of center fuel conveying pipe end；The periphery fuel channel includes peripheral fuel -supply pipe, and the peripheral fuel nozzle being connected on the periphery fuel -supply pipe outer wall；The annular air channel includes peripheral air channel and central air passage, the peripheral air channel includes several circumferentially uniformly distributed pipelines, it is respectively connected with inclined tube in the exit of each pipeline, the axis direction of the inclined tube and the axis direction of pipeline are at certain tilt angle.In the present invention, the multitube premixed of peripheral channel and the application of end inclined tube make oil gas blending uniformly, reduce disposal of pollutants.
Description
Technical field
The present invention relates to gas mixer, in particular to a kind of multitube fuel gas mixing machine of monocline tubular type outlet.
Background technique
With the development of society, requirement of the people for efficient utilization and the environmental protection of the energy is higher and higher.And conventional
Fossil fuel still occupies sizable ratio, and the carbon dioxide and pollutant emission generated causes very big environment pressure
Power, therefore people advocate energy-saving and emission-reduction, on the one hand develop the new energies such as solar energy, wind energy, reduce carbon emission；On the other hand right
Wish that the fuel utilization of fossil fuel can more efficiently, disposal of pollutants is lower.However this kind of new energy of solar energy, wind energy is because of it
Natural characteristic and at this stage technical restriction, are also unsuitable for large-scale promotion.Therefore fossil fuel is more efficiently utilized, it is made
The discharge of pollutant is lower, is method most viable at this stage.
One of the thermal powerplant that boiler and industrial furnace burn as most important application, it using wide, including
Heating, electric power, metallurgy, building, chemical industry and UTILIZATION OF VESIDUAL HEAT IN etc..China's boiler and industrial furnace total amount are huge, and now
The most energy consumption of equipment is more, efficiency is relatively low, and exhaust emission object amount is big, not only consumes a large amount of coal and petroleum, while into atmosphere
Discharge a large amount of solid particulate matters and gas pollutant.
The gaseous fuels such as natural gas are a kind of efficient, high-quality, clean gaseous fuels, on boiler or other thermal hardwares
Face has good prospect.Efficiency of combustion can be improved in premixed combustion, effectively enhances flame intensity.At the same time, premix combustion
Burning can also make to burn to be carried out in a bigger equivalence ratio range.A kind of burning as disclosed in patent CN206001524U
Room radial direction two-stage swirl nozzle, can be improved combustion stability.But currently used gas plant, predominantly diffusion combustion
Burning and incomplete premixed combustion, there is local equivalent proportions, and higher, temperature distributing disproportionation increases so as to cause emission
Disadvantage.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of multitube fuel gas mixing machine of monocline tubular type outlet,
To improve efficiency of combustion, pollutant emission is reduced.
A kind of multitube fuel gas mixing machine of monocline tubular type outlet provided by the invention, including shell, edge in the shell
It is radially coaxial to be provided with center fuel passage, peripheral fuel channel and annular air channel；During the center fuel passage includes
Heart fuel -supply pipe, and it is connected to the central fuel nozzle of center fuel conveying pipe end, and in the central fuel nozzle
End be provided with center fuel spray-hole；The periphery fuel channel includes peripheral fuel -supply pipe, and is connected to the periphery
Several peripheral fuel nozzles circumferentially on fuel -supply pipe outer wall, and be provided in the end of the peripheral fuel nozzle
Peripheral fuel injection hole；The annular air channel includes peripheral air channel and central air passage, and the peripheral air is logical
Road includes several circumferentially uniformly distributed pipelines, peripheral swirl-flow devices is provided in each pipeline, in the central air passage
It is provided with Swirl device；It is respectively connected with inclined tube in the exit of each pipeline, the axis direction of the inclined tube and the axis of pipeline
Line direction is at certain tilt angle, so that forming eddy flow by the fuel and air mixture that the inclined tube sprays.
Preferably, each inclined tube is evenly distributed with form in circumferential.
Preferably, projection of the axis of each inclined tube on the cross section of the shell intersects, and defines transversal with this
Regular polygon centered on the central point of face.
Preferably, the end of the center fuel passage is provided with premix chamber, will spray from the center fuel spray-hole
Fuel out is mixed with the air through the Swirl device eddy flow.
Preferably, the premix chamber includes the first demarcation plate that the central fuel nozzle radial outside is arranged in, and is set
The second demarcation plate in the first demarcation plate radial outside is set, first demarcation plate and the second demarcation plate are sprayed with center fuel
Mouth is coaxially arranged.
Preferably, the Swirl is provided between the inner wall of first demarcation plate and the outer wall of central fuel nozzle
Device.
Preferably, the Swirl device is axial rotational flow device or radial vortex device.
Preferably, the position of the peripheral fuel injection hole is radially towards inside, radially towards outside, circumferential towards downstream or several
Person combines.
Preferably, the current limliting area ratio in the central air passage and peripheral air channel is 1:5 to 1:10.
A kind of working principle of the multitube fuel gas mixing machine of monocline tubular type outlet provided by the invention is as follows, center combustion
Material reaches central fuel nozzle by way of center fuel passage, by center fuel delivery pipe, is fired by the center on central fuel nozzle
Expect that spray-hole sprays；Peripheral fuel reaches peripheral fuel nozzle by way of peripheral fuel channel, by peripheral fuel -supply pipe, by periphery
Fuel injection hole sprays；Air enters annular air channel, and a part enters peripheral air channel, remaining is logical into center air
Road；Into central air passage air after Swirl device eddy flow, with center fuel spray-hole spray fuel together with
Ignition is carried out into downstream；The fuel sprayed into the air in peripheral air channel and peripheral fuel injection hole, through pipeline
After interior peripheral swirl-flow devices reinforce blending, sprayed by the inclined tube of pipe end, into fired downstream.
The invention has the following beneficial effects:
(1) peripheral swirl-flow devices are capable of the eddy flow mixing of enhanced fuel and air, are reduced by the premix of fuel and air
Discharge；Peripheral air can be divided into more parts by the multitube premixed of peripheral channel, carried out and fired respectively in each pipeline
The premix of material may make fuel and air to blend more uniform, further decrease disposal of pollutants；
(2) peripheral swirl-flow devices increase the contact area of the gas in mixing machine, keep mixing rapider, reduce
Detonation trend has steady flame effect, reduces combustion oscillation；The exit of the pipeline in peripheral air channel is provided with inclined tube, can make
The fuel and air mixture that must be sprayed generates eddy flow, and center fuel passage can cooperate center by center fuel spray regime
Swirl-flow devices and premix chamber decouple center and periphery just from flowing, realize injection diffusion combustion+swirl flame burning
Mode achievees the effect that reliable ignition and maximum reduce discharge；
(3) peripheral swirl-flow devices and Swirl device radially divide two stage arrangement, while guaranteeing mixing effect, matching
The VELOCITY DISTRIBUTION of jet expansion.Guarantee that nozzle exit velocity is reasonably distributed, fuel-air blends uniformly by two-stage swirl-flow devices,
Rationally control combustion zone maintains combustion chamber flow field structure, to guarantee the stability and good emission performance of burning；
(4) air velocity that peripheral air channel is limited with the area of peripheral air duct, guarantees peripheral side air velocity
Type distribution, so that continual and steady burning, guarantees that entire combustion chamber is not stopped working in adjustment process；
(5) central fuel nozzle and peripheral fuel nozzle are individually adjusted, and cooperate the tune of each fuel injection hole site and size
It is whole, broader design space can be provided for nozzle, meet the needs of different fuel and air blending.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is a kind of structural schematic diagram of the multitube fuel gas mixing machine of monocline tubular type outlet of the present invention；
Fig. 2 is the right view of Fig. 1；
Fig. 3 is a kind of tomograph of the multitube fuel gas mixing machine of monocline tubular type outlet of the present invention.
Appended drawing reference:
1- shell；2- center fuel passage；The periphery 3- fuel channel；4- annular air channel；5- pipeline；The periphery 6- eddy flow
Device；7- Swirl device；8- inclined tube；9- premix chamber；
21- center fuel delivery pipe；22- central fuel nozzle；The periphery 31- fuel -supply pipe；The periphery 32- fuel nozzle；
41- peripheral air channel；42- central air passage；The first demarcation plate of 91-；The second demarcation plate of 92-；
221- center fuel spray-hole；The periphery 321- fuel injection hole.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
As shown in Figure 1, Figure 2 and Figure 3, a kind of multitube fuel gas for monocline tubular type outlet that one embodiment of the invention provides
Mixing machine, the shell 1 including tubulose are coaxially arranged with center fuel passage 2, peripheral fuel channel 3 in 1 inner radial of shell
With annular air channel 4, wherein peripheral fuel channel 3 is set in the periphery of center fuel passage 2, and center fuel passage 2 includes
Along the center fuel delivery pipe 21 of casing center axis arrangement, and it is connected to the center fuel of 21 end of center fuel delivery pipe
Nozzle 22, and the end of the central fuel nozzle 22 is provided with center fuel spray-hole 221；Peripheral fuel channel 3 includes outer
Fuel -supply pipe 31 is enclosed, and 8 peripheral fuel nozzles 32 circumferentially being connected on 31 outer wall of periphery fuel -supply pipe,
And the end of the peripheral fuel nozzle 32 is provided with peripheral fuel injection hole 321；The annular air channel 4 includes periphery
Air duct 41 and central air passage 42, wherein peripheral air channel 41 is evenly distributed with by several circumferential directions inside shell 1 are arranged in
Pipeline 5 limit, be provided with peripheral swirl-flow devices 6 in each pipeline 5, be provided with center in the central air passage 42
Swirl-flow devices 7；It is respectively connected with inclined tube 8 in the exit of each pipeline 5, the axis direction of the inclined tube 8 and the axis direction of pipeline 5
At certain tilt angle, and each inclined tube 8 is evenly distributed with form in circumferential so that the fuel that is sprayed by the inclined tube 8 and
Air mixture forms eddy flow.
In the present embodiment, center fuel reaches center fuel spray by way of center fuel passage 2, by center fuel delivery pipe 21
Mouth 22 is sprayed by the center fuel spray-hole 221 on central fuel nozzle 22；Peripheral fuel is by way of peripheral fuel channel 3, by outer
It encloses fuel -supply pipe 31 and reaches peripheral fuel nozzle 32, sprayed by peripheral fuel injection hole 321；Air is entered by shell inlet end
Annular air channel 4, a part enter in peripheral air channel 41 defined by pipeline 5, remaining enters central air passage 42；
Into central air passage 42 air after 7 eddy flow of Swirl device, with center fuel spray-hole 221 spray fuel one
It rises and enters downstream progress ignition；The fuel sprayed into the air in peripheral air channel 41 and peripheral fuel injection hole 321,
After the peripheral swirl-flow devices 6 in pipeline 5 reinforce blending, sprayed by the inclined tube 8 of 5 end of pipeline, into fired downstream.
Above-mentioned periphery swirl-flow devices 6 are capable of the eddy flow mixing of enhanced fuel and air, are dropped by the premix of fuel and air
Low emission；Peripheral air can be divided into more parts by the multitube premixed of peripheral channel, be carried out respectively in each pipeline 5
With the premix of fuel, it may make fuel and air to blend more uniform, further decrease disposal of pollutants；In the outlet of pipeline 5
Place's setting inclined tube 8, may make the fuel and air mixture of ejection to generate eddy flow, to obtain good emission performance.
Projection of the axis of each inclined tube 8 on the cross section of the shell 1 intersects, and defines with the cross-section center
Regular polygon centered on point, in practice, can also be according to fuel combustion the case where, rationally designs the tilt angle of inclined tube 8
And inclined direction, to obtain preferably emission performance.
Further, the end of above-mentioned center fuel passage 2 is provided with premix chamber 9, will be from center fuel injection hole 221
The fuel of ejection is mixed with the air through 7 eddy flow of Swirl device, and is entered point downstream fire and burnt, and the effect of reliable ignition is reached
Fruit；The premix chamber exports indent relative to pipeline 5, which includes centrally disposed 22 radial outside of fuel nozzle
First demarcation plate 91, and the second demarcation plate 92 of 91 radial outside of the first demarcation plate is set, 91 He of the first demarcation plate
Second demarcation plate 92 is coaxially arranged with central fuel nozzle 22, and the first and second demarcation plate restriction forms the premix chamber
Area of space.
The Swirl dress is provided between the inner wall of above-mentioned first demarcation plate 91 and the outer wall of central fuel nozzle 22
7 are set, which can be axial rotational flow or radial vortex, and specific form can be vane type or beveling cellular type.
The position of above-mentioned periphery fuel injection hole 321 can for radial inward side, radially towards outside, circumferential towards downstream or several
Person combines, and can rationally design according to the actual situation to it.
In addition, the current limliting area ratio in above-mentioned central air passage 42 and peripheral air channel 41 is chosen as 1:5 to 1:10.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify to technical solution documented by previous embodiment, or some or all of the technical features are equal
Replacement；And these are modified or replaceed, the model for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses, should all cover within the scope of the claims and the description of the invention.
Claims (7)
1. a kind of multitube fuel gas mixing machine of monocline tubular type outlet, it is characterised in that:
Including shell, center fuel passage, peripheral fuel channel and annular air channel are radially coaxially arranged in the shell；
The center fuel passage includes center fuel delivery pipe, and is connected to the center fuel of center fuel conveying pipe end
Nozzle, and the end of the central fuel nozzle is provided with center fuel spray-hole；
The periphery fuel channel includes peripheral fuel -supply pipe, and several weeks being connected on the periphery fuel -supply pipe outer wall
Peripheral fuel injection hole is provided with to the peripheral fuel nozzle of arrangement, and in the end of the peripheral fuel nozzle；
The annular air channel includes peripheral air channel and central air passage, and the peripheral air channel includes several weeks
To uniformly distributed pipeline, it is provided with peripheral swirl-flow devices in each pipeline, center rotation is provided in the central air passage
Flow device；
It is respectively connected with inclined tube in the exit of each pipeline, the axis direction of the inclined tube and the axis direction of pipeline are at certain inclination
Angle, so that forming eddy flow by the fuel and air mixture that the inclined tube sprays；
Each inclined tube is evenly distributed with form in circumferential；Projection of the axis of each inclined tube on the cross section of the shell is mutually handed over
Fork, defines the regular polygon centered on the cross-section center point；
The fuel sprayed into the air in the peripheral air channel and the peripheral fuel injection hole, through the institute in the pipeline
It states peripheral swirl-flow devices to reinforce after blending, the inclined tube for passing through the pipe end sprays.
2. a kind of multitube fuel gas mixing machine of monocline tubular type outlet according to claim 1, it is characterised in that:
The end of the center fuel passage is provided with premix chamber, the fuel and warp that will be sprayed from the center fuel spray-hole
The air of the Swirl device eddy flow mixes.
3. a kind of multitube fuel gas mixing machine of monocline tubular type outlet according to claim 2, it is characterised in that:
The premix chamber includes the first demarcation plate that the central fuel nozzle radial outside is arranged in, and is arranged at this first point
Second demarcation plate of partition radial outside, first demarcation plate and the second demarcation plate are coaxially arranged with central fuel nozzle.
4. a kind of multitube fuel gas mixing machine of monocline tubular type outlet according to claim 3, it is characterised in that:
The Swirl device is provided between the inner wall of first demarcation plate and the outer wall of central fuel nozzle.
5. a kind of multitube fuel gas mixing machine of monocline tubular type outlet according to claim 4, it is characterised in that:
The Swirl device is axial rotational flow device or radial vortex device.
6. a kind of multitube fuel gas mixing machine of monocline tubular type outlet according to claim 1, it is characterised in that:
The position of the periphery fuel injection hole is to combine radially towards inside, radially towards outside, circumferentially towards downstream or a few persons.
7. a kind of multitube fuel gas mixing machine of monocline tubular type outlet according to claim 1, it is characterised in that:
The current limliting area ratio in the central air passage and peripheral air channel is 1:5 to 1:10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710245724.6A CN107036098B (en) | 2017-04-14 | 2017-04-14 | A kind of multitube fuel gas mixing machine of monocline tubular type outlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710245724.6A CN107036098B (en) | 2017-04-14 | 2017-04-14 | A kind of multitube fuel gas mixing machine of monocline tubular type outlet |
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| Publication Number | Publication Date |
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| CN107036098A CN107036098A (en) | 2017-08-11 |
| CN107036098B true CN107036098B (en) | 2019-10-11 |
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| CN201710245724.6A Expired - Fee Related CN107036098B (en) | 2017-04-14 | 2017-04-14 | A kind of multitube fuel gas mixing machine of monocline tubular type outlet |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108730976B (en) * | 2018-05-18 | 2023-12-05 | 浙江炬烁热能设备制造有限公司 | Premixed open type ultralow nitrogen burner |
| CN115451431B (en) * | 2022-09-22 | 2024-04-16 | 中国联合重型燃气轮机技术有限公司 | Fuel nozzle premixing system for combustion chamber of gas turbine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203703982U (en) * | 2014-02-12 | 2014-07-09 | 重庆紫光新科化工开发有限公司 | Combustor and combustion furnace |
| CN104136851A (en) * | 2012-02-21 | 2014-11-05 | 通用电气公司 | A combustor nozzle and method of supplying fuel to a combustor |
| CN203940428U (en) * | 2014-06-19 | 2014-11-12 | 广东正鹏生物质能源科技有限公司 | A kind of Problem of Biomass Fuel Gas Combustion installment for Industrial Boiler |
| CN206001524U (en) * | 2016-08-30 | 2017-03-08 | 林宇震 | A kind of combustor radial direction two-stage swirl nozzle |
-
2017
- 2017-04-14 CN CN201710245724.6A patent/CN107036098B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104136851A (en) * | 2012-02-21 | 2014-11-05 | 通用电气公司 | A combustor nozzle and method of supplying fuel to a combustor |
| CN203703982U (en) * | 2014-02-12 | 2014-07-09 | 重庆紫光新科化工开发有限公司 | Combustor and combustion furnace |
| CN203940428U (en) * | 2014-06-19 | 2014-11-12 | 广东正鹏生物质能源科技有限公司 | A kind of Problem of Biomass Fuel Gas Combustion installment for Industrial Boiler |
| CN206001524U (en) * | 2016-08-30 | 2017-03-08 | 林宇震 | A kind of combustor radial direction two-stage swirl nozzle |
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| CN107036098A (en) | 2017-08-11 |
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