CN108980829A - A kind of star-like gas-air premixed device - Google Patents
A kind of star-like gas-air premixed device Download PDFInfo
- Publication number
- CN108980829A CN108980829A CN201810365483.3A CN201810365483A CN108980829A CN 108980829 A CN108980829 A CN 108980829A CN 201810365483 A CN201810365483 A CN 201810365483A CN 108980829 A CN108980829 A CN 108980829A
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- Prior art keywords
- gas
- combustion gas
- combustion
- air
- flow
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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
- F23D14/62—Mixing devices; Mixing tubes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention discloses a kind of star-like gas-air premixed devices to belong to forced-air blast formula mixer, when solving existing big load, premixed device volume is larger, combustion gas is easier the effect by incoming air and keeps combustion gas and the air concentration distribution in the entire cross section of premixed device uneven, and the low problem of intermediate high surrounding is presented.Structure of the invention includes fan interface, gas pipeline, gas distributor, diffuser pipe and combustion head, fan interface is connected to provide premix air with blower, incoming air is disturbed to form peripheral flow by combustion gas outflow tube, incoming flow combustion gas is sprayed under the effect of compression power by aperture in 24 combustion gas outflow tubes enters gas mixing pipe, it sprays combustion gas and generates eddy flow on 4 sections, increase turbulence intensity, Turbulence Flow is generated under the shear action by incoming air makes premix gas mixed effect full and uniform, and last gaseous mixture speed in diffuser pipe, which sufficiently develops, enters combustion head.The mixed gas effect of pre-mixing apparatus provided by the invention is good, is suitble to the mixed gas demand of big load premixed combustion.
Description
Technical field
The present invention relates to a kind of star-like gas-air premixed devices, are suitable for combustion gas full premix combustion equipment.
Background technique
Currently, full premix technology is a kind of mode that air needed for fuel gas buring is all mixed into combustion gas and is burnt again,
Premixed device is usually set before combustion chamber, and combustion gas and air are introduced into premixed device and carry out being thoroughly mixed in proportion, so that combustion
Gas and air concentration and VELOCITY DISTRIBUTION are uniform, do not need to be supplemented air in combustion, are no longer limited by burning velocity
The physical conditions such as gas diffusion velocity keep burning more abundant, more efficient.Wherein, domestic gas appliance load is small, it may be considered that with benefit
With gaseous-pressure injection air, i.e., common Venturi tube generates negative pressure Juan Xi throat by the combustion gas that nozzle at high speeds is injected and enters
Air reach optimum mixture ratio.Industrial gas appliance load is big, if can make the volume of injector excessively using combustion gas injection air
It is huge, it has to using the method for forced-air blast.
Existing combustion apparatus generallys use single tube and enters combustion gas, and there are problems to be: when big load, premixed device volume is larger,
Combustion gas is easier the effect by incoming air and keeps combustion gas and the air concentration distribution in the entire cross section of premixed device uneven, is in
The low problem of existing intermediate high surrounding, so that combustion process is unstable.
Summary of the invention
The present invention provides a kind of star-like gas-air premixed device, solves the mixer due to caused by fuel gas inlet when big load
Unilateral high problem is presented in interior gas concentration, to improve combustion gas mixing effect.
A kind of star-like gas-air premixed device, including fan interface, gas pipeline, gas distributor, diffuser pipe and combustion
Burn head.
The fan interface is connected with blower, provides whole air capacity required for premixed combustion as blower.
Further, gas pipeline and gas distributor are connected with fan interface tail portion T-type, and gas distributor is by more than one
Hole pipeline and 24 combustion gas outflow tube compositions, total sectional area are slightly less than fan interface sectional area, and incoming air is gone out to flow by combustion gas
Pipe disturbs to form peripheral flow, generates whirlpool, increases turbulence intensity.
Further, equidistant 4 sectional uniforms of streamwise are distributed 6 isometrical holes on void channels, amount to 24 holes,
First section to the 4th section holes center successively deviates 15 °, 24 combustion gas outflow tubes made of stainless steel tube and hole pair
It connects, is forming the distribution in star-like dispersion shape perpendicular to flow direction, flow into combustion gas and shunted under gas distributor effect,
To which incoming flow combustion gas distribution be entered in 24 small cross-sectional area combustion gas effluent conduits.
The combustion gas outflow tube is that single head closes tubular type, and 12 apertures are equidistantly opened on tube wall face, are pacified on void channels
Make hole direction with flow direction in 60 ° of angles when dress.
Further, incoming flow combustion gas is sprayed under the effect of compression power by aperture in 24 combustion gas outflow tubes enters gas mixing pipe road
Interior, aperture, which is evenly arranged on, allows the combustion gas sprayed full of entire gas mixing pipe road in entire flow cross section.
Further, combustion gas squit hole, which is oriented, deviates 60 ° away from incoming air, so that spraying combustion gas on 4 sections
Eddy flow is generated, turbulence intensity is increased, Turbulence Flow is generated under by the effect of the Strong shear of incoming air, to reach abundant
Mixed effect.
Further, gaseous mixture flows into burning full of entire pipe cross section after straight tube and diffuser pipe speed sufficiently develop
Head.
To sum up content: a kind of star-like gas-air premixed device of the present invention, by the mixed gas region of single big sectional area
The Mixed Zone of the more eddy flows of multi-section is divided by combustion gas outflow tube, by proportion so that into every part Mixed Zone air
It is appropriate with gas quantity ratio, mixed gas efficiency is improved, the non-uniform phenomenon of gas-air concentration distribution, changes when reducing big load
It has been apt to premixing effect.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the streamwise front view of Fig. 1.
Fig. 3 is the void channels structural schematic diagram in Fig. 1.
Fig. 4 is the structural schematic diagram of combustion gas outflow tube in Fig. 1.
Marked in the figure: fan interface 1, gas pipeline 2, combustion gas outflow tube 3, void channels 4, end socket 5, diffuser pipe 6 and combustion
Burn head 7.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
With reference to Fig. 1, the position Fig. 1 schematic structural view of the invention is as shown in the figure: fan interface 1 and the T-shaped connection of gas pipeline 2,
Air is introduced by blower to be entered in premix chamber by fan interface, is mixed with the combustion gas flowed out by gas distributor, combustion gas
Void channels 4 and combustion gas isocon 3 are arranged on distributor, gas enters combustion head 7 via diffuser pipe 6 after mixing.
It is structure of the invention streamwise front view with reference to Fig. 2, Fig. 2, as shown in the figure: premix chamber is by 24 small cross-sectional areas
Combustion gas outflow tube composition, is distributed in star-like dispersion shape, and total sectional area is slightly less than fan interface sectional area, and incoming air is in combustion gas
Outflow tube effect is lower to generate peripheral flow, and incoming flow combustion gas enters 24 combustion gas by the void channels distribution on gas distributor and goes out to flow
Pipe forms multiply small flows.
It is the structural schematic diagram of void channels with reference to Fig. 3, Fig. 3, equidistant 4 sections of streamwise on the void channels
Be uniformly distributed 6 isometrical holes, amount to 24 holes, the first section to the 4th section center Shang Kong successively deviates 15 °, 24 by
Combustion gas outflow tube made of stainless steel tube is docked with hole, and the distribution in star-like dispersion shape is being formed perpendicular to flow direction.
It is the structural schematic diagram of combustion gas outflow tube with reference to Fig. 4, Fig. 4, the combustion gas outflow tube is that single head closes tubular type, in pipe
12 apertures are equidistantly opened on wall surface, make hole towards, in 60 ° of angles, incoming flow combustion gas is 24 with flow direction when installing on void channels
It is sprayed under the effect of compression power by aperture in a combustion gas outflow tube and enters gas mixing pipe, sprayed combustion gas and generate eddy flow on 4 sections, increase
Big turbulence intensity, generates Turbulence Flow under by the effect of the Strong shear of incoming air, is sufficiently mixed effect to reach.
Claims (3)
1. a kind of star-like gas-air premixed device, including fan interface (1), fuel gas pipeline (2), combustion gas isocon (3), antipriming pipe
Road (4), diffuser pipe (6) and combustion head (7), it is characterised in that: the gas pipeline (2) and fan interface (1) T-shaped connection,
Gas pipeline (2) is connected with gas distributor, and gas distributor includes 24 combustion gas isocons (3) and void channels (4), institute
It states combustion gas and shunts pipeline (3) and void channels (4) in perpendicular flow direction in the distribution of star-like dispersion shape；The diffuser pipe (6)
It is connected with gas pipeline (2), combustion head (4).
2. a kind of star-like gas-air premixed device according to claim 1, it is characterised in that: premix chamber is by 24 small bores
Product combustion gas outflow tube composition, is distributed, total sectional area is slightly less than fan interface sectional area, and incoming air is being fired in star-like dispersion shape
The effect of gas outflow tube is lower to generate peripheral flow, and incoming flow combustion gas enters 24 combustion gas by the void channels distribution on gas distributor and goes out
Flow tube forms multiply small flows.
3. a kind of multi-pore channel gas-air premixed device according to claim 1, it is characterised in that: combustion gas outflow tube is single head
Tubular type is closed, 12 apertures are equidistantly opened on tube wall face, makes hole direction with flow direction in 60 ° when installing on void channels
Angle, incoming flow combustion gas is sprayed under the effect of compression power by aperture in 24 combustion gas outflow tubes enters gas mixing pipe, sprays combustion gas and cuts at 4
Eddy flow is generated on face, increases turbulence intensity, Turbulence Flow is generated under by the effect of the Strong shear of incoming air, to reach
It is sufficiently mixed effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810365483.3A CN108980829A (en) | 2018-04-23 | 2018-04-23 | A kind of star-like gas-air premixed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810365483.3A CN108980829A (en) | 2018-04-23 | 2018-04-23 | A kind of star-like gas-air premixed device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108980829A true CN108980829A (en) | 2018-12-11 |
Family
ID=64541846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810365483.3A Pending CN108980829A (en) | 2018-04-23 | 2018-04-23 | A kind of star-like gas-air premixed device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108980829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093554A1 (en) * | 2021-11-23 | 2023-06-01 | 中国科学院大连化学物理研究所 | Gas-air mixing structure and burner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480566Y (en) * | 2001-05-10 | 2002-03-06 | 上海柴油机股份有限公司 | Pipe type flor guiding gas mixer |
| US6827573B2 (en) * | 2002-10-25 | 2004-12-07 | Brown & Williamson Tobacco Corporation | Gas micro burner |
| CN201787581U (en) * | 2010-09-16 | 2011-04-06 | 哈尔滨北辰电站设备有限公司 | Mixing device with pore plates |
| CN103292325A (en) * | 2013-06-28 | 2013-09-11 | 广东万和电气有限公司 | Household gas stove |
| CN204962768U (en) * | 2015-09-17 | 2016-01-13 | 中山市恒乐电器有限公司 | Gas and air load in mixture in advance and put |
| CN205655297U (en) * | 2016-04-22 | 2016-10-19 | 浙江炬炼热能设备制造有限公司 | Honeycomb formula air and gas premixing device |
| CN107620962A (en) * | 2017-08-23 | 2018-01-23 | 广东宝杰环保科技有限公司 | A kind of biogas low NO |
-
2018
- 2018-04-23 CN CN201810365483.3A patent/CN108980829A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480566Y (en) * | 2001-05-10 | 2002-03-06 | 上海柴油机股份有限公司 | Pipe type flor guiding gas mixer |
| US6827573B2 (en) * | 2002-10-25 | 2004-12-07 | Brown & Williamson Tobacco Corporation | Gas micro burner |
| CN201787581U (en) * | 2010-09-16 | 2011-04-06 | 哈尔滨北辰电站设备有限公司 | Mixing device with pore plates |
| CN103292325A (en) * | 2013-06-28 | 2013-09-11 | 广东万和电气有限公司 | Household gas stove |
| CN204962768U (en) * | 2015-09-17 | 2016-01-13 | 中山市恒乐电器有限公司 | Gas and air load in mixture in advance and put |
| CN205655297U (en) * | 2016-04-22 | 2016-10-19 | 浙江炬炼热能设备制造有限公司 | Honeycomb formula air and gas premixing device |
| CN107620962A (en) * | 2017-08-23 | 2018-01-23 | 广东宝杰环保科技有限公司 | A kind of biogas low NO |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093554A1 (en) * | 2021-11-23 | 2023-06-01 | 中国科学院大连化学物理研究所 | Gas-air mixing structure and burner |
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Application publication date: 20181211 |