CN203836958U - Flow mixing type combustor with multiple tangential air channels in central symmetry - Google Patents
Flow mixing type combustor with multiple tangential air channels in central symmetry Download PDFInfo
- Publication number
- CN203836958U CN203836958U CN201420090212.9U CN201420090212U CN203836958U CN 203836958 U CN203836958 U CN 203836958U CN 201420090212 U CN201420090212 U CN 201420090212U CN 203836958 U CN203836958 U CN 203836958U
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- air
- tangential
- air channel
- combustion chamber
- inducer
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Abstract
The utility model discloses a flow mixing type combustor with multiple tangential air channels in central symmetry. The flow mixing type combustor with the multiple tangential air channels in central symmetry comprises two main parts of a traditional combustor, an air distributor and a combustion chamber located in front of the air distributor, wherein the air distributor is composed of a tangential ejector, a Venturi ejector and a gas nozzle, the tangential ejector, the Venturi ejector and the gas nozzle are arranged in sequence from front to back, a mixing cavity is arranged inside the tangential ejector, the Venturi ejector and the mixing cavity are arranged concentrically, the gas nozzle is arranged at the rear end of the Venturi ejector, the tangential ejector is provided with the multiple angential air channels in central symmetry, a ring current is formed in the air mixing cavity by secondary air introduced by the multiple air channels, the ring current is accelerated through multiple streams of secondary air with the same tangential angle, the flows and speeds of air in all positions of the ring current are almost the same, and namely air is evenly distributed in the mixing cavity. According to the flow mixing type combustor with the multiple tangential air channels in central symmetry, the speeds or the flows of the secondary air in the tangential ejector are even, it can also be guaranteed that the secondary air is evenly distributed in the combustion chamber when the secondary air enters the combustion chamber through an air guiding wheel, finally the secondary air and fuel gas are fully mixed, and combustion efficiency is improved.
Description
Technical field
The utility model relates to a kind of burner, relates in particular to a kind of mixed flow burner with the tangential air channel of a plurality of Central Symmetries.Relate to Patent classificating number F23 combustion apparatus; Combustion method F23C is used the combustion method of fluid fuel or equipment F23C7/00 to take the combustion apparatus that air supply device is feature.
Background technology
Existing burner, is especially provided with an air inlet at air register place, the air-flow of being introduced by air inlet enters combustion chambers burn after evenly mixing in air register with fuel.Because the air-flow that air inlet is introduced is introduced by single air channel, the air when entering combustion chamber is also inhomogeneous, can not reach mixed uniformly state with fuel.As shown in figure 10, the air of being introduced by air inlet 13A (or other combustion-supporting gas) in air register inside owing to only having an air inlet, the air-flow of introducing can not form and be uniformly distributed circulation all the time in air register inside, flow velocity at the air-flow velocity of Secondary Air porch apparently higher than other position, when entering combustion chamber by inducer, inhomogeneous with combustion gas mixing, directly affect efficiency of combustion.
Utility model content
The utility model can not equally distributed problem in hybrid chamber for Secondary Air, and a kind of mixed flow burner with the tangential air channel of a plurality of Central Symmetries of development, comprise: two large parts of conventional burners, air register and be positioned at its anterior combustion chamber, described air register is followed successively by from front to back:
The inner tangential injector with hybrid chamber, with the Venturi transmission ejector of the concentric setting of described hybrid chamber be arranged on the gas nozzle of Venturi transmission ejector rear end; Described tangential injector has the tangential air channel that a plurality of Central Symmetries arrange, the Secondary Air of being introduced by described a plurality of air channels forms circulation in hybrid chamber, this circulation is accelerated jointly by the identical Secondary Air of the multiply angle of contingence, air mass flow and the flow velocity of each position of circulation are basically identical, air in hybrid chamber for being uniformly distributed.With respect to the single Secondary Air air intake duct of available technology adopting, flow velocity or the flow distribution of Secondary Air in tangential injector is more even, when entering combustion chamber by inducer, also can guarantee Secondary Air being uniformly distributed in combustion chamber, finally fully mix with combustion gas, improve efficiency of combustion.
In combustion process, because Venturi transmission ejector and tangential injector constantly spray combustion gas and air to combustion chamber, in use very easily cause the Relative Vibration of combustion chamber and air register, especially axial Relative Vibration is particularly evident, generation of vibration noise also affects the composition life-span of each parts simultaneously, and in existing burner, combustion chamber and air register lack corresponding fixedly glissando conventionally.
Pretending is a preferably embodiment, is provided with an annular holddown groove on the top of air register, has a plurality of interior edges simultaneously on the top of annular holddown groove; In the bottom of combustion chamber, be provided with accordingly a plurality of and interior projection along coordinating; The inwall interference fits of the outer rim of described projection and described annular holddown groove; The inner edge interference fits on outer wall of combustion chamber and described a plurality of interior edges.
In when assembling, described annular holddown groove is inserted in described combustion chamber, it is described along below that revolving combustor is positioned at described projection, completes being connected of combustion chamber and air register.Owing to being provided with corresponding fixed structure, what make to connect between combustion chamber and air register is tightr, can effectively resist axial Relative Vibration, can effectively reduce noise and increase service life.
In order to guarantee in combustion process, the proportioning of combustion gas and combustion air is all the time in best ratio, and especially, for the situation of fuel gas source supply gas pressure and calorific value shakiness, the air mass flow in described a plurality of tangential air channels is all adjustable.As an embodiment preferably, in described tangential air channel, there is the deep bead of controlling air quantity;
One end of deep bead is flexibly connected with the madial wall in tangential air channel by pivot, regulates the angle of deep bead lifting, can enter according to the flow-control of combustion gas the flow of Secondary Air in air register, guarantees that combustion gas and combustion air are all the time in best mixed proportion.
As an embodiment preferably, the multiple that the quantity in described tangential air channel is 2, the airflow direction of being introduced by tangential air channel relatively and be parallel to each other, is formed on the rotating annular airflow of same direction in air register.
Further, in order to match with the deep bead in tangential air channel, the more accurate flow that enters injection air-flow in air register of controlling, it is adjustable that described gas nozzle gos deep into the length of described Venturi transmission ejector, can further control the introducing air quantity of Venturi transmission ejector.Match with the baffle plate in tangential air channel, can both set up the premix ratio of best combustion gas and air for the combustion gas of different calorific values, different pressures.
In order to increase induction efficiency, as an embodiment preferably, the front end spout of described Venturi transmission ejector is arranged in this inner chamber;
During work, the fuel-air mixture being sprayed by Venturi transmission ejector enters after described inner chamber, via inducer, sprays; In ejection process, formed negative pressure is introduced the hybrid chamber sidewall of air register and the space between inner chamber by Secondary Air by described a plurality of tangential air channel, and Secondary Air is introduced combustion chamber mixed combustion by described inducer after forming even circulation.
Further, described inducer is eddy flow inducer, and the hypomere of this inducer is ganoid cylinder, and the space forming between the inwall of this lower cylindrical section, hybrid chamber bottom and the blade of inducer epimere is described inner chamber; Secondary Air between described hybrid chamber sidewall and inner chamber is via the guiding of eddy flow inducer, in the shape of a spiral ejection.Make the gas that enters combustion chamber can accelerate rotation, extended doing time in advance of combustion gas, strengthened premixing effect.Due to the effect of its rotation water conservancy diversion, make the flame that the flame in combustion chamber is rotary-jet simultaneously, promoted the efficiency of flame interaction working interface.
Simultaneously, because inducer hypomere is smooth cylinder, (Secondary Air that forms eddy flow can not be subject to extra resistance to have guaranteed in flow process, not to be subject to other resistance by rotational flow air, especially the resistance that the shape of hybrid chamber inwall and cylinder outer wall is brought), increased the flow velocity of gas cyclone, reduced the time that the multiply Secondary Air of being introduced by air inlet duct forms stable and uniform distribution circulation, further strengthened by inducer enter combustion chamber Secondary Air be uniformly distributed effect, finally reach the object of improving combustion efficiency.
As an embodiment preferably, described eddy flow inducer comprises that described eddy flow inducer comprises through hole and is located on a plurality of blades of these through hole outer peripheral edges;
The front end of described a plurality of blades surrounds diameter of a circle and is greater than a plurality of blade back segments and surrounds diameter of a circle; The common vertical line being connected with described two circles and the axis angle at 45 ° of through hole; The leading edge of blade is 45 ° at the angle of the orthographic projection of inducer and the formation of the tangent line at root of blade place, and blade twist angle is 45 °, and the air-flow of drawing via blade is 45 ° of spirals ejections.
Therefore the inwall of the utility model combustion chamber has hyperbola cross section.Be that combustion chamber is divided into and is positioned at the divergent section of far-end and near the converging portion of air register, due to the existence of converging portion, the air of being discharged by eddy flow inducer is hampered at converging portion, form convolution eddy current, extended the time that air stops in combustion chamber; And the turbine forming can make air have secondary or repeatedly with the chance of contacts fuel gas, with respect to the plain combustion chamber of straight pipe type, avoided fuel and air too fast by combustion chamber, efficiency of combustion significantly increases.
Further, consider that traditional combustion chamber (or being described as radial chamber) is the in the situation that of gaseous-pressure shakiness, in insufficient pressure and as easy as rolling off a log tempering or the de-fiery phenomenon of causing excessively strong in the situation that.The equal diameters of the two ends entrance and exit of described combustion chamber, i.e. described converging portion and the equal diameters of divergent section end.No matter be the pressure excessive or too small (at certain pressure range) of combustion gas, the burning position of combustion gas and air is limited in place, hyperbola summit, has stopped tempering and de-fiery phenomenon that burner produces because of gaseous-pressure variation when work.
The sidewall of described combustion chamber is divided into three layers, heat-insulation layer and the overcoat of the radiating layer of innermost layer, centre; Described radiating layer material is the exotic material of thermal conductivity factor more than 80W/m.K, guaranteed that radial chamber can heat up rapidly in use at short notice, its radianting capacity can guarantee that the central temperature of flame reaches more than 1300 ℃, can further promote the abundant burning of fuel gas, reduce the discharge of dusty gas.
The described middle heat-insulation layer that is positioned at is the insulation material that solid high alumina is shaped, and reduces greatly heat loss, makes the heat energy that burner in use produces act on more fully required interface.
Accompanying drawing explanation
Technical scheme for clearer explanation embodiment of the present utility model or prior art, by the accompanying drawing of required use in embodiment or description of the Prior Art being done to one, introduce simply below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the cutaway view of the utility model burner
Fig. 2 is the cutaway view of the utility model air register
Fig. 3 is the schematic diagram in A-A cross section shown in the utility model Fig. 2
Fig. 4 is the top view of the utility model air register
Fig. 5 is the upward view of the utility model eddy flow inducer
Fig. 6 is the side view of the utility model eddy flow inducer
Fig. 7 is the top view of the utility model eddy flow inducer
Fig. 8 is the cutaway view of the utility model combustion chamber
Fig. 9 is the stereogram of the utility model combustion chamber
Figure 10 is the structural representation of air register in prior art
The specific embodiment
For making object, technical scheme and the advantage of embodiment of the present utility model clearer, below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is known to complete description:
Embodiment 1 is as shown in Figure 1:
A mixed flow burner, as shown in Figure 1, comprises and is positioned at the Venturi transmission ejector 2 of below, is fixed on the tangential injector 1 of Venturi transmission ejector 2 tops and the combustion chamber 3 of the top.
As shown in Figure 2: described tangential injector 1 comprises two two tangential air channels 13 vertical with air register central axis, two described tangential air channels 13 are parallel to each other, and the airflow direction that introduce separately in tangential air channel is relative, tangent with the gas circulating of tangential injector 1 inside.The lateral wall in described tangential air channel 13 is tangent with the outer wall of tangential injector 1.
The outer 14 in the upper end of tangential injector 1 with a support fixed combustion chamber is provided with annular holddown groove 141 on outer 14, and as shown in Figure 4, this is interior matches with the projection 33 of 3 outsides, combustion chamber along 141, fixed combustion chamber 3 and air register.
In tangential injector 1 inside, be provided with inner chamber 11, the spray-hole of Venturi transmission ejector 2 is arranged in this inner chamber 11, and the combustion gas being sprayed by Venturi transmission ejector 2 and the mist of air are by through hole 121 ejections at described eddy flow inducer 12 middle parts.
As shown in Figure 3: in tangential air channel 13, be provided with deep bead 15, one end of this deep bead 15 is fixed on the air inlet place in tangential air channel by pivot.In actual use, the angle that regulates deep bead 15 to lift, i.e. adjustable intake.
As shown in Figure 5-Figure 7, eddy flow inducer 12 is arranged in tangential injector 1, eddy flow inducer 12 also comprises the cylinder 123 that is positioned at inducer hypomere, the through hole at middle part 121 and be arranged on described in a plurality of blades of rotating shaft outer rim the front end of a plurality of blades and surround diameter of a circle and be greater than a plurality of blade back segments and surround diameter of a circle; The common vertical line being connected with described two circles and the axis of through hole are at 45 °, i.e. angle a=45 ° as shown in Figure 6; The leading edge of angle blade is 45 ° at the angle of the orthographic projection of inducer and the formation of the tangent line at root of blade place, angle b=45 ° as shown in Figure 7, the torsion angle of blade self is similarly 45 °, angle c=45 ° as shown in Figure 7, and described each blade and inducer are 45 ° and disperse.Gas combustion gas around straight spray in combustion chamber 3 by 12 outputs of eddy flow inducer is rotated.
As shown in Figure 8 and Figure 9, the radiating layer 31 that combustion chamber 3 inner wall surface have successively from the inside to the outside isolated combustion chamber internal heat heat-insulation layer 32 and inside, combustion chamber carried out to secondary radiation heating.
The cross section of described radiating layer 31 is hyperbola cross section, and middle part has hyp summit 311, and this projection 311 is divided into inside, combustion chamber to be positioned at the divergent section of far-end and the converging portion of close tangential injector.The existence of converging portion has guaranteed that introducing air forms eddy current, has extended the time of contact of air and combustion gas, and eddy current has also increased the touch opportunity of air and combustion gas simultaneously, has increased burning time, has improved efficiency of combustion.
The sidewall of combustion chamber is divided into three layers, heat-insulation layer 32 and the overcoat 34 of the radiating layer 31 of innermost layer, centre; Described radiating layer 31 materials are the exotic material of thermal conductivity factor more than 80W/m.K, guaranteed that radial chamber can heat up rapidly in use at short notice, its radianting capacity can guarantee that the central temperature of flame reaches more than 1300 ℃, can further promote the abundant burning of fuel gas, reduce the discharge of dusty gas.
The described middle heat-insulation layer 32 that is positioned at is the insulation material that solid high alumina is shaped, and reduces greatly heat loss, makes the heat energy that burner in use produces act on more fully required interface.
Outermost overcoat 34 adopts 316 white steel matter, has guaranteed bulk strength and the heat resistance of burner.
The utility model, with having a wide range of applications field, can be used as multiple burner and uses.When take the commercial gas-combusting stove for Chinese meal that liquefied gas is main source of the gas, through " national gas appliance Quality Supervision and Inspection Center " be up to the standards and the < < survey report > > (No. 2011-039, business's word) that provides at it in:
Sample title: Chinese Cooking Gas Appliance
Model specification: ZCY1-9A
Kind of inspection: type inspection;
Especially the main combustibility parameter of two in the Interventions Requested of combustion conditions:
1. CO(a=1 in dry flue gas), in content measuring, GB requires CO content≤0.10% of indirect smoke exhausting type; Chimney meatus transmitting smoke formula CO content≤0.20%, adopting the CO content of the product of the utility model structure is only 0.006%.
2. in dry flue gas in the content detection of NOx compound, GB is not done requirement, is only 0.010%, far ahead of national like product test stone and adopt the content of the NOx of the utility model infrastructure product.
The above; it is only the preferably specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; according to the technical solution of the utility model and utility model design thereof, be equal to replacement or changed, within all should being encompassed in protection domain of the present utility model.
Claims (10)
1. a mixed flow burner with the tangential air channel of a plurality of Central Symmetries, it is characterized in that having: air register and be positioned at its anterior combustion chamber, described air register comprises from front to back successively: the inner tangential injector with hybrid chamber, with the Venturi transmission ejector of the concentric setting of described hybrid chamber be arranged on the gas nozzle of Venturi transmission ejector rear end; Described tangential injector has the tangential air channel that a plurality of Central Symmetries arrange, and the Secondary Air of being introduced by described a plurality of air channels forms circulation in hybrid chamber, and this circulation is accelerated jointly by the identical Secondary Air of the multiply angle of contingence.
2. the mixed flow burner with the tangential air channel of a plurality of Central Symmetries according to claim 1, is further characterized in that: the top of described air register is provided with annular holddown groove, and this annular holddown groove has a plurality of interior edges; Described outer wall of combustion chamber is provided with a plurality of and described interior projection along coordinating; Described a plurality of interior edge and the outer wall interference fits with combustion chamber;
During assembling, described annular holddown groove is inserted in described combustion chamber, it is described along below that revolving combustor is positioned at described projection, completes being connected of combustion chamber and air register.
3. the mixed flow burner with the tangential air channel of a plurality of Central Symmetries according to claim 1, is further characterized in that: the air mass flow in described tangential air channel is adjustable; Inner side, described tangential air channel has the deep bead of controlling intake, and one end of deep bead is flexibly connected with tangential air channel madial wall by pivot.
4. according to the mixed flow burner with the tangential air channel of a plurality of Central Symmetries described in claim 1-3 any one claim, be further characterized in that: the multiple that the quantity in described tangential air channel is 2, the airflow direction introduced by tangential air channel relatively and be parallel to each other, is formed on the rotating annular airflow of same direction in air register.
5. the mixed flow burner with the tangential air channel of a plurality of Central Symmetries according to claim 4, is further characterized in that: it is adjustable that described gas nozzle gos deep into the length of described Venturi transmission ejector.
6. the mixed flow burner with the tangential air channel of a plurality of Central Symmetries according to claim 1, is further characterized in that: in described air register hybrid chamber, also have an inner chamber, the front end spout of described Venturi transmission ejector is arranged in this inner chamber;
During work, the fuel-air mixture being sprayed by Venturi transmission ejector enters after described inner chamber, via inducer, sprays; In ejection process, formed negative pressure is introduced the hybrid chamber sidewall of air register and the space between inner chamber by Secondary Air by described a plurality of tangential air channel, and Secondary Air is introduced combustion chamber mixed combustion by described inducer after forming even circulation.
7. the mixed flow burner with the tangential air channel of a plurality of Central Symmetries according to claim 6, be further characterized in that: described inducer is eddy flow inducer, the hypomere of this inducer is ganoid cylinder, and the space that the blade of this hypomere cylinder inner wall, hybrid chamber bottom and inducer epimere forms is described inner chamber; Secondary Air between described hybrid chamber sidewall and inner chamber is via the guiding of eddy flow inducer, in the shape of a spiral ejection.
8. according to claim, require the mixed flow burner with the tangential air channel of a plurality of Central Symmetries described in 7, be further characterized in that: described eddy flow inducer comprises through hole and is located on a plurality of blades of these through hole outer peripheral edges;
The front end of described a plurality of blades surrounds diameter of a circle and is greater than a plurality of blades rear end and surrounds diameter of a circle; The common vertical line being connected with described two circles and the axis angle at 45 ° of through hole; The leading edge of blade is 45 ° at the angle of the orthographic projection of inducer and the formation of the tangent line at root of blade place; Blade twist angle is 45 °; The air-flow of drawing via blade is 45 ° of spiral ejections.
9. the mixed flow burner with the tangential air channel of a plurality of Central Symmetries according to claim 1, be further characterized in that: the cross section of described Inner Wall of Combustion Chamber is hyperbola, hyp center is separated into combustion chamber to be positioned at the divergent section of far-end and the converging portion of close air register; Described converging portion length is longer than the length of described converging portion; Divergent section outlet equates with converging portion inlet diameter.
10. according to the mixed flow burner with the tangential air channel of a plurality of Central Symmetries described in claim 1 or 9, be further characterized in that: the sidewall of described combustion chamber is divided into three layers heat-insulation layer and the overcoat of the radiating layer of innermost layer, centre; Described radiating layer material is the exotic material of thermal conductivity factor more than 80W/m.K; The described middle heat-insulation layer that is positioned at is the insulation material that solid high alumina is shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420090212.9U CN203836958U (en) | 2014-02-28 | 2014-02-28 | Flow mixing type combustor with multiple tangential air channels in central symmetry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420090212.9U CN203836958U (en) | 2014-02-28 | 2014-02-28 | Flow mixing type combustor with multiple tangential air channels in central symmetry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203836958U true CN203836958U (en) | 2014-09-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420090212.9U Withdrawn - After Issue CN203836958U (en) | 2014-02-28 | 2014-02-28 | Flow mixing type combustor with multiple tangential air channels in central symmetry |
Country Status (1)
| Country | Link |
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| CN (1) | CN203836958U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776030A (en) * | 2014-02-28 | 2014-05-07 | 大连本源节能科技有限公司 | Mixed-flow burner provided with multiple centrally-symmetric tangential air channels |
| CN104832928A (en) * | 2015-05-22 | 2015-08-12 | 遵义市节庆机电有限责任公司 | Methane combustion device |
| CN110779015A (en) * | 2016-03-18 | 2020-02-11 | 三浦工业株式会社 | Venturi nozzle and fuel supply device provided with same |
| CN112762445A (en) * | 2021-01-19 | 2021-05-07 | 河北安然通用设备有限公司 | Premixing burner |
| CN113405093A (en) * | 2021-05-06 | 2021-09-17 | 中国科学院工程热物理研究所 | Fuel nozzle, combustion device and combustion control method |
-
2014
- 2014-02-28 CN CN201420090212.9U patent/CN203836958U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776030A (en) * | 2014-02-28 | 2014-05-07 | 大连本源节能科技有限公司 | Mixed-flow burner provided with multiple centrally-symmetric tangential air channels |
| CN103776030B (en) * | 2014-02-28 | 2017-01-04 | 大连本源节能科技有限公司 | There is the mixed flow burner in the tangential air channel of multiple centrosymmetry |
| CN104832928A (en) * | 2015-05-22 | 2015-08-12 | 遵义市节庆机电有限责任公司 | Methane combustion device |
| CN110779015A (en) * | 2016-03-18 | 2020-02-11 | 三浦工业株式会社 | Venturi nozzle and fuel supply device provided with same |
| CN110779015B (en) * | 2016-03-18 | 2021-03-26 | 三浦工业株式会社 | Venturi nozzle and fuel supply device provided with same |
| CN112762445A (en) * | 2021-01-19 | 2021-05-07 | 河北安然通用设备有限公司 | Premixing burner |
| CN112762445B (en) * | 2021-01-19 | 2021-10-15 | 河北安然通用设备有限公司 | Premixing burner |
| CN113405093A (en) * | 2021-05-06 | 2021-09-17 | 中国科学院工程热物理研究所 | Fuel nozzle, combustion device and combustion control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140917 Effective date of abandoning: 20161019 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |