CN204987005U - Air distributor and low NOx gas combustion ware of gas combustion utensils - Google Patents
Air distributor and low NOx gas combustion ware of gas combustion utensils Download PDFInfo
- Publication number
- CN204987005U CN204987005U CN201520507110.7U CN201520507110U CN204987005U CN 204987005 U CN204987005 U CN 204987005U CN 201520507110 U CN201520507110 U CN 201520507110U CN 204987005 U CN204987005 U CN 204987005U
- Authority
- CN
- China
- Prior art keywords
- gas
- air
- outer ring
- combustion
- inner ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model provides an air distributor and low NOx gas combustion ware of gas combustion utensils, the air distributor of gas combustion utensils wherein includes a circular shape air break plate, the center of this air break plate of is equipped with the center tube matched with centre bore with the gas combustion ware, is equipped with at least round through -hole on the periphery of centre bore, this air break plate, the top of through -hole is equipped with the whirl blade that is a contained angle with the air break plate, and the whirl blade has formed the whirl seam of guide air current to usefulness with the through -hole cooperation. This air distributor and gas combustion ware can make the flame temperature reduce and the oxygen that reduces among the combustion air combines with nitrogen gas and nitrogen -containing group to effectively restrain NOx's formation, reduced NOx's emission.
Description
Technical field
The utility model relates to combustion with reduced pollutants technical field, particularly relates to a kind ofly to be applied in air distributor in gas burner and a kind of gas burner.
Background technology
In recent years, haze has become grave danger of publilc health, and nitrogen oxide is the main composition of haze, and the discharge controlling nitrogen oxide has become the Important Action administering haze weather.Along with Energy restructuring, natural gas energy resource proportion significantly increases, the situation that fuel gas buring discharge nitrogen oxide pollutes more and more receives publicity, country promulgates " boiler Air Pollutant Emission " new standard, strict index has been formulated to discharged nitrous oxides, stricter index will be formulated in some key areas, if Beijing is 80mg/m to gas fired-boiler emission limits of nitrogen oxides
3(benchmark oxygen content 3.5%).
Fuel gas buring produces NOx and belongs to heating power type, produce NOx number depend on flame temperature, flame temperature is relevant with furnace heat release, for the gas fired-boiler that furnace heat release is larger, as thermal power is less than the gas fired-boiler of 14MW, combustion space is relatively little, and heat exchange area is few, is unfavorable for reducing flame temperature.So, emission limits of nitrogen oxides be made lower than 80mg/m
3(benchmark oxygen content 3.5%), burner only adopts the technical measures reducing flame temperature to be not enough to the formation of degree of depth suppression nitrogen oxide, for this reason, how more effectively to suppress the formation of nitrogen oxide, also needs further research.
In order to reduce the discharged nitrous oxides value of gas burner, in some gas burners, can cyclone be set, but existing hydrocyclone structure is complicated, manufacturing cost is high, so need to improve.In addition, in existing gas burner, there is no air distributor, accurately air can not be sent into each combustion zone.
Utility model content
The purpose of this utility model is to provide a kind of air distributor making air swirl, also accurately air can be sent into the gas burner gone in each combustion zone simultaneously, the utility model additionally provides a kind of low NOx gas burner, solve the problem that traditional gas burner nitrogen oxide emission is large.
For achieving the above object, the utility model adopts following technical scheme: a kind of air distributor of gas burner, it is characterized in that: the air distribution plate comprising a circle, the center of this air distribution plate is provided with the centre bore matched with the central tube of gas burner, the periphery of centre bore, this air distribution plate are provided with at least one ring through hole, it is the swirl vane of an angle that the top of described through hole is provided with air distribution plate, and swirl vane coordinates with through hole to define and guides the eddy flow of air flow to stitch.
Preferably, the edge of this air distribution plate is evenly equipped with breach.
Preferably, the angle of described swirl vane and air distribution plate is 30 ° ~ 45 °.
A kind of low NOx gas burner, include the inner core and urceolus that coaxially arrange and the outer ring gas spray head communicated with gas pipeline be arranged between inner core with urceolus, it is characterized in that: the center of described inner core is provided with the central tube of conveying air and combustion gas mixing gas; On described central tube, cover has inner ring combustion gas sleeve, and inner ring combustion gas sleeve be surrounded by the inner ring blast tube communicated with gas pipeline between central tube, the upper end surrounding sidewall of inner ring combustion gas sleeve also has the inner ring gas jet orifice of the radial direction communicated with inner ring blast tube; Space inside described inner core is inner ring combustion zone, and the space between described urceolus and inner core, above the gas spray head of outer ring is combustion zone, outer ring; On inner ring combustion gas sleeve below described inner ring gas jet orifice, cover has the air distributor of gas burner, described inner core is arranged on the air distributor of this gas burner, and described inner ring combustion zone is communicated with the space below air distribution plate by the eddy flow seam on the air distributor of gas burner; Leave circumferential weld in the air distributor of described gas burner and between urceolus, combustion zone, described outer ring is communicated with the space below air distribution plate by circumferential weld.
Preferably, described outer ring gas spray head is higher than inner ring gas jet orifice, between urceolus and inner core, the below of outer ring gas spray head is provided with outer ring combustion air passage, and combustion zone, described outer ring is communicated with the space below air distribution plate by outer ring combustion air passage and circumferential weld.
Preferably, the top of described urceolus is higher than outer ring gas spray head, and outer ring gas spray head is higher than the top of inner core, and the top of inner core is higher than inner ring gas jet orifice.
Compared with prior art the utility model has following characteristics and beneficial effect:
The utility model provides a kind of air distributor be applied in gas burner, this air distributor is compared with traditional cyclone, not only structure simple, be easy to processing, and both there is the function of cyclone, air swirl can be made, there is again the function of air distribution, air can be distributed according to need accurately and to go to the inner ring combustion zone and combustion zone, outer ring of combustion gas gas apparatus, formed two kinds of various flows to air-flow.Air is sent into each combustion zone by air distributor by the utility model accurately, can reduce the discharge capacity of the nitrogen oxide of gas burner.
The utility model additionally provides the lower gas burner of a kind of emission limits of nitrogen oxides, and this gas burner have employed the mode of inside and outside circle burning, reduces flame temperature, can suppress the generation of NOx further.
Gas burner described in the utility model, the gas-flow that its outer ring combustion air is axially sprayed by outer ring combustion air passage and multiple outer rings gas spray head mixes, combustion zone, outer ring is made up of multiple flame, adds flame area of dissipation, is conducive to reducing flame temperature.
Gas burner described in the utility model, the inner space of its inner core forms inner ring combustion zone, inner ring combustion air is by forming swirling eddy after the eddy flow seam of air distributor, the multiply combustion gas thread that swirling eddy sprays with inner ring gas jet orifice radial direction mixes, enhance air and combustion gas mixing, shorten the time of staying of flue gas in high-temperature region, be conducive to reducing flame temperature.
Gas burner described in the utility model, its central tube conveying air and combustion gas mixing gas (Some gases and air pre-mixing gas) enter inner ring combustion zone, and combustion gas and air pre-mixing enhance burning, can ensure the not de-fire of flame.
Gas burner described in the utility model, gas flow in its inner ring combustion zone accounts for 25% ~ 30% of total gas flow, air mass flow in inner ring combustion zone accounts for 10% of total air mass flow, gas flow in combustion zone, outer ring accounts for 70% ~ 75% of total gas flow, and the air mass flow in combustion zone, outer ring accounts for 80% ~ 90% of total air mass flow.Inner ring combustion zone excess air coefficient is less than 1.0, and be dense burning, combustion zone, outer ring excess air coefficient is greater than 1.2, for light burning, the multiple flame of combination and combustion zone, outer ring of inside and outside circle bias combustion, reduces flame temperature, thus effectively inhibit the generation of NOx, reduce the discharge of NOx.
Gas burner described in the utility model, on urceolus, be also provided with perforation and injection sheet, when the mist of air and combustion gas sprays from urceolus, form negative pressuren zone at perforation place, in combustion chamber, flue gas is along injection sheet, is inhaled into combustion zone by entering perforation.
Gas burner described in the utility model, it is by arranging perforation and injection sheet, when the mist of air and combustion gas is sprayed from the urceolus of gas burner, negative pressuren zone is formed at perforation place, in combustion chamber, flue gas is along injection sheet, combustion zone is inhaled into by entering perforation, utilize perforation and injection sheet that flue gas in combustion chamber is introduced combustion zone, the concentration of combustion zone oxygen can be made to reduce, the oxygen decreased in combustion air is combined with nitrogen and nitrogen-containing group, thus effectively inhibit the generation of NOx, and then reach the effect of the NOx only producing minute quantity.
Gas burner described in the utility model, inside and outside circle is adopted to burn, and the dense burning of inner ring, the light burning in outer ring, also be provided with air distributor and perforation and injection sheet simultaneously, the concentration of combustion zone oxygen so just can be made to reduce, and the oxygen reduced in combustion air is combined with nitrogen and nitrogen-containing group, thus effectively suppresses the generation of NOx, and then reach the NOx only producing minute quantity, make discharged nitrous oxides lower than 60mg/m
3the effect of (benchmark oxygen content 3.5%).
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail.
Fig. 1 is the schematic top plan view of the air distributor of gas burner.
Fig. 2 is the schematic diagram of A-A section in Fig. 1.
Fig. 3 is the structural representation of low NOx gas burner.
Fig. 4 is the schematic top plan view of Fig. 3.
Reference numeral: 1-central tube, 2-inner ring gas jet orifice, 3-air distribution plate, 4-swirl vane, 5-inner core, 6-outer ring gas spray head, 7-urceolus, 8-injection sheet, 9-inner ring combustion zone, 10-outer ring combustion air passage, 11-circumferential weld, 12-through hole, 13-perforation, 14-breach, combustion zone, 15-outer ring, 16-inner ring combustion gas sleeve, 17-inner ring blast tube, 18-centre bore.
Detailed description of the invention
Embodiment is see shown in Fig. 1-3, the air distributor of described gas burner, comprise the air distribution plate 3 of the circle be made up of heat-resisting steel sheet and plate, the center of this air distribution plate 3 is provided with the centre bore 18 matched with the central tube of gas burner, the periphery of centre bore, this air distribution plate 3 are provided with at least one ring through hole 12, the top of described through hole 12 is provided with and the swirl vane 4 of air distribution plate 3 in 30 ° ~ 45 ° of angles, and swirl vane 4 coordinates with through hole 12 to define and guides the eddy flow of air flow to stitch.The edge of air distribution plate 3 is evenly equipped with the position jagged 14 of breach 14(and corresponding outer ring gas spray head 6).
Shown in Fig. 3, Fig. 4, be provided with the low NOx gas burner of the air distributor of gas burner, include the inner core 5 and urceolus 7 that coaxially arrange and the outer ring gas spray head 6 communicated with gas pipeline be arranged between inner core 5 with urceolus 7, the shower nozzle top of outer ring gas spray head 6 is equipped with 1 gas jet orifice.
The center of described inner core 5 is provided with the central tube 1 of conveying air and combustion gas mixing gas.
On described central tube 1, cover has inner ring combustion gas sleeve 16, and inner ring combustion gas sleeve 16 be surrounded by the inner ring blast tube 17 communicated with gas pipeline between central tube 1, the upper end surrounding sidewall of inner ring combustion gas sleeve 16 also has the inner ring gas jet orifice 2 of the radial direction communicated with inner ring blast tube 17.
Described air distribution plate 3 is enclosed within the inner ring combustion gas sleeve 16 below inner ring gas jet orifice 2 by centre bore 18, and described inner core 5 is arranged on air distribution plate 3, and inner core 5, air distribution plate 3 are surrounded by inner ring circle combustion zone 9 with inner ring combustion gas sleeve 16.On described air distribution plate 3, the position of corresponding outer ring gas spray head 6 is provided with breach 14, makes air distribution plate be that lace is discoid.
The periphery of centre bore, this air distribution plate 3 are provided with the through hole 12 air distribution plate 3 inside the through hole 12(of at least one circle strip i.e. inner core 5 being evenly equipped with strip), the top of through hole 12 be provided with again guide air flow with the swirl vane 4 of air distribution plate 3 in 30 ° ~ 45 ° of angles, described inner ring combustion zone 9 is communicated with the space below air distribution plate by the eddy flow seam formed by through hole 12 and swirl vane 4.The combustion air of the eddy flow needed for described inner ring combustion zone 9 is that the eddy flow seam that the air below air distribution plate passes through to be formed by through hole 12 and swirl vane 4 enters inner ring combustion zone 9.
Space inside described urceolus 7, above outer ring gas spray head 6 is combustion zone, outer ring 15, circumferential weld 11 is left between described air distribution plate 3 and urceolus 7, in the present embodiment, outer ring gas spray head 6 is higher than inner ring gas jet orifice 2, between urceolus 7 and inner core 5, the below of outer ring gas spray head 6 is provided with outer ring combustion air path 10, and combustion zone, described outer ring 15 is communicated with the space below air distribution plate by outer ring combustion air path 10 and circumferential weld 11.Combustion air needed for combustion zone, described outer ring 15 is that the air below air distribution plate enters combustion zone, outer ring 15 by circumferential weld 11.
In the present embodiment, described urceolus 7 is circumferentially provided with at least one circle perforation 13 extracting flue gas in combustion chamber, the inner side of perforation 13 is provided with again the injection sheet 8 tilted to urceolus axle center from bottom to top guiding flue gas flow direction, and described injection sheet 8 is generally 30 ° ~ 60 ° with the angle of urceolus 7.In addition, in other embodiments, Liang Quan, three circles or more circle perforation can also be designed on urceolus.
See Fig. 4, in the present embodiment, perforation 13 is arch hole.In other embodiments, also semicircle orifice or square hole etc. can be designed to.
In the present embodiment, the top of urceolus 7 is higher than outer ring gas spray head 6, and outer ring gas spray head 6 is higher than the top of inner core 5, and the top of inner core 5 is higher than inner ring gas jet orifice 2.
Applicant is found by research, and described low NOx gas burner adopts following combustion gas configuration mode, and result of use is best, and the discharged nitrous oxides of gas burner can be made lower than 60mg/m
3(benchmark oxygen content 3.5%): the gas flow in described inner ring combustion zone 9 accounts for 25% ~ 30% of total gas flow, air mass flow in described inner ring combustion zone 9 accounts for 10% ~ 20% of total air mass flow, gas flow in combustion zone, described outer ring 15 accounts for 70% ~ 75% of total gas flow, and the air mass flow in combustion zone, described outer ring 15 accounts for 80% ~ 90% of total air mass flow.
In addition, as most preferred embodiment, the gas flow that described central tube 1 sprays accounts for 5% ~ 10% of the gas flow in inner ring combustion zone, and the air mass flow that described central tube 1 sprays accounts for 15% ~ 20% of the air mass flow in inner ring combustion zone.
In Fig. 3, hollow arrow represents air and combustion gas mixing gas, and solid arrow represents combustion gas, and dotted arrow represents air.
Claims (6)
1. the air distributor of a gas burner, it is characterized in that: the air distribution plate (3) comprising a circle, the center of this air distribution plate (3) is provided with the centre bore (18) matched with the central tube of gas burner, the periphery of centre bore, this air distribution plate (3) are provided with at least one ring through hole (12), the top of described through hole (12) is provided with the swirl vane (4) with air distribution plate (3) in an angle, and swirl vane (4) coordinates to define with through hole (12) and guides the eddy flow of air flow to stitch.
2. the air distributor of gas burner according to claim 1, is characterized in that: the edge of this air distribution plate (3) is evenly equipped with breach (14).
3. the air distributor of gas burner according to claim 1, is characterized in that: described swirl vane (4) is 30 ° ~ 45 ° with the angle of air distribution plate (3).
4. a low NOx gas burner, includes the inner core (5) and urceolus (7) that coaxially arrange and the outer ring gas spray head (6) communicated with gas pipeline be arranged between inner core (5) with urceolus (7), it is characterized in that:
The center of described inner core (5) is provided with the central tube (1) of conveying air and combustion gas mixing gas;
The upper cover of described central tube (1) has inner ring combustion gas sleeve (16), and be surrounded by the inner ring blast tube (17) communicated with gas pipeline between inner ring combustion gas sleeve (16) with central tube (1), the upper end surrounding sidewall of inner ring combustion gas sleeve (16) also have the inner ring gas jet orifice (2) of the radial direction communicated with inner ring blast tube (17);
The space of described inner core (5) inner side is inner ring combustion zone (9), and the space between described urceolus (7) and inner core (5), above outer ring gas spray head (6) is combustion zone, outer ring (15);
The upper air distributor overlapping have the right requirement 1 or the gas burner described in 2 or 3 of inner ring combustion gas sleeve (16) of described inner ring gas jet orifice (2) below, described inner core (5) is arranged on the air distributor of this gas burner, and described inner ring combustion zone (9) is communicated with the space below air distribution plate by the eddy flow seam on the air distributor of gas burner;
Leave circumferential weld (11) in the air distributor of described gas burner and between urceolus (7), combustion zone, described outer ring (15) is communicated with the space below air distribution plate by circumferential weld (11).
5. low NOx gas burner according to claim 4, it is characterized in that: described outer ring gas spray head (6) is higher than inner ring gas jet orifice (2), between urceolus (7) and inner core (5), the below of outer ring gas spray head (6) is provided with outer ring combustion air passage (10), and combustion zone, described outer ring (15) is communicated with the space below air distribution plate by outer ring combustion air passage (10) and circumferential weld (11).
6. low NOx gas burner according to claim 4, it is characterized in that: the top of described urceolus (7) is higher than outer ring gas spray head (6), outer ring gas spray head (6) is higher than the top of inner core (5), and the top of inner core (5) is higher than inner ring gas jet orifice (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520507110.7U CN204987005U (en) | 2015-07-14 | 2015-07-14 | Air distributor and low NOx gas combustion ware of gas combustion utensils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520507110.7U CN204987005U (en) | 2015-07-14 | 2015-07-14 | Air distributor and low NOx gas combustion ware of gas combustion utensils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204987005U true CN204987005U (en) | 2016-01-20 |
Family
ID=55121372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520507110.7U Active CN204987005U (en) | 2015-07-14 | 2015-07-14 | Air distributor and low NOx gas combustion ware of gas combustion utensils |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204987005U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730970A (en) * | 2017-04-15 | 2018-11-02 | 南京建安机械制造有限公司 | Five-channel coal-powder combustor |
| CN109668149A (en) * | 2019-01-09 | 2019-04-23 | 上海迎韦热能设备有限公司 | Burner and central flame flame boiler containing it |
| CN110043920A (en) * | 2019-04-03 | 2019-07-23 | 大唐东营发电有限公司 | It is a kind of for ignition of the boiler and combustion-supporting device |
-
2015
- 2015-07-14 CN CN201520507110.7U patent/CN204987005U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730970A (en) * | 2017-04-15 | 2018-11-02 | 南京建安机械制造有限公司 | Five-channel coal-powder combustor |
| CN109668149A (en) * | 2019-01-09 | 2019-04-23 | 上海迎韦热能设备有限公司 | Burner and central flame flame boiler containing it |
| CN109668149B (en) * | 2019-01-09 | 2024-02-23 | 上海迎韦热能设备有限公司 | Combustor and central backfire boiler comprising same |
| CN110043920A (en) * | 2019-04-03 | 2019-07-23 | 大唐东营发电有限公司 | It is a kind of for ignition of the boiler and combustion-supporting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105042591A (en) | Low NOx gas burner and fuel gas configuration method thereof | |
| CN205939145U (en) | Low NOx gas combustion ware structure | |
| CN103267286B (en) | A kind of gas combustion apparatus of ultra-low NOx emission and gas collocation method | |
| CN204786417U (en) | Urceolus and low NOx gas combustion ware of gas combustion ware | |
| CN205137451U (en) | Force to draw low NOx gas combustion ware of penetrating flue gas backward flow | |
| CN205939136U (en) | Novel low nitrogen oxide burner structure | |
| CN204165044U (en) | The premixed coal dust low NO of a kind of adverse current | |
| CN106196057A (en) | A kind of novel low nitrogen oxide burner structure | |
| CN105318328B (en) | The interior more flame low NOX gas burners of circulation | |
| CN108954305A (en) | A kind of novel hierarchical burning low nitrogen oxide burner structure | |
| CN204987005U (en) | Air distributor and low NOx gas combustion ware of gas combustion utensils | |
| CN106196059A (en) | A kind of low nitrogen oxide burner structure | |
| CN205939137U (en) | Super low nitrogen oxide burner structure of civil boiler | |
| CN205119061U (en) | Gas fractional combustion ware | |
| CN205939138U (en) | Low nitrogen oxide burner structure | |
| CN204084467U (en) | The swirl nozzle that the axial two-stage direction of gas-turbine combustion chamber is contrary | |
| CN103629663A (en) | Swirl pulverized coal burner | |
| CN206786717U (en) | A kind of two-chamber combustion gas low nitrogen burning machine | |
| CN205939146U (en) | Novel low NOx gas combustion ware | |
| CN205480976U (en) | Hierarchical ultralow nitrogen gas burner of strong whirl fuel | |
| CN201288124Y (en) | Access pure oxygen combustor of glass kiln | |
| CN109099425B (en) | Flue gas inner loop ultralow nitrogen combustor | |
| CN209484592U (en) | Based on polymorphic type jet-burner structure | |
| CN208418701U (en) | A kind of low-NOx combustor for biomass and combustion of natural gas | |
| CN204084375U (en) | Classification oxygen enrichment flameless combustion fuel burner nozzle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190618 Address after: 100011 No. 35 Donghou Street, Ganshui Bridge Waiguan, Andingmen, Chaoyang District, Beijing Co-patentee after: Yanshan Industry Gas Burning Device Co., Ltd., Beijing Patentee after: Beijing Public Utility Research Institute Co-patentee after: Beijing North fire ring energy technology development Co., Ltd. Address before: 100011 No. 35 Donghou Street, Ganshui Bridge Waiguan, Andingmen, Chaoyang District, Beijing Co-patentee before: Yanshan Industry Gas Burning Device Co., Ltd., Beijing Patentee before: Beijing Public Utility Research Institute Co-patentee before: Beijing Public Utility Technology Development Co., Ltd. |