CN106051764A - Low NOx burner and wall-hanging stove provided with same - Google Patents
Low NOx burner and wall-hanging stove provided with same Download PDFInfo
- Publication number
- CN106051764A CN106051764A CN201610542167.XA CN201610542167A CN106051764A CN 106051764 A CN106051764 A CN 106051764A CN 201610542167 A CN201610542167 A CN 201610542167A CN 106051764 A CN106051764 A CN 106051764A
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- fire
- low
- nox
- hole
- igniting
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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
- F23D14/02—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
Abstract
The invention discloses a low NOx burner and a wall-hanging stove provided with the same. The low NOx burner comprises a baffle plate and a plurality of fire grates which are arranged parallel one another, wherein a plurality of fire holes are formed on the upper sides of the fire grates; the low NOx burner further comprises a plurality of igniting covers, wherein a plurality of secondary fire holes are formed on the upper sides of the igniting covers, secondary fire transfer holes are formed on two side walls of the igniting covers, and the igniting covers are mounted above the fire grates to form secondary mixed burning fire grates with double-layered fire holes. By reducing the highest temperature of the roots of the fire grates and reasonably organizing the burning air flows and improving the generating and standing times of a high temperature region, the content of NOx of the burner after gas burning is effectively reduced, so that the content of NOx is reduced to a fourth-level or fifth-level discharge standard range from a third -level discharge standard, the national emission-reducing environment-friendly policy is met, and the applicable range of a product is expanded.
Description
Technical field
The present invention relates to fuel wall hanging formula heating stove field, particularly relate to a kind of low-NOx combustor and there is this low NOx combustion
The wall-hung boiler of burner.
Background technology
Existing wall-hung boiler burner has atmospheric burner, add water cold dish pipe burner and complete pre-formula burner, its system
Being rustless steel or metallic fiber as material, wherein after both burner fuel gas burings rear, NOx content " fires according to GB25034-2010
Gas water heater for heating " standard-required and method of testing, NOx emission grade up to 5 grade standard requirements, and atmospheric burner combustion
After gas firing, NOx content but can only achieve 3 grade standard requirements；According to Beijing terrestrial reference related request, NOx content discharge is had strict
Restriction, after existing atmospheric burner fuel gas buring, NOx content can not reach its emission request, causes and is provided with air suspended type
The wall-hung boiler range of applicability of burner is restricted.
The NOx produced due to wall-hung boiler burning is mainly thermal NO x and Quick-type Nox, and wherein thermal NO x accounts for 90%
Left and right, if thus wall-hung boiler NOx discharge to be reduced, emphasis should be placed on reduction thermal NO x on.According to Zdldovich Frank-Kamenetskii relation
Thermal NO x generative theory, the growing amount of thermal NO x is mainly the most relevant with temperature, and substantially exponent function relation, its relation
See that (with NO as representative, wherein transverse axis represents temperature/K to Figure 13, and vertical pivot represents NO volume fraction/10-6).According to this principle, if
NOx generation amount to be reduced is it is necessary to reduce ignition temperature, and owing to being limited by heating technique and the thermal efficiency, ignition temperature can not drop
Obtaining the lowest, must set about in terms of two so reducing thermal NO x:
One is conscientiously to reduce ignition temperature, the peak temperature especially burnt；
Two is rationalization's air-flow, makes the temperature field of burning the most uniformly in the case of ensureing thermic load.
As shown in Figs. 7-9, existing atmospheric burner includes support a, some fire rows b and baffle plate c, and fire row b is parallel to each other
Be arranged on support a, baffle plate c is fixed in fire row b rear, is arranged over some fire hole d, in each fire row b in each fire row b
Two sides are connected with one and are easy to the flash hole e that flame is propagated.The fire row b quantity of said burner is according to volume designed by machine product
Determining to determine during thermic load, the thermic load that general single fire is provided is about 2kW, and the power section according to existing wall-hung boiler, fire
Row amount is typically in the range of 6～20 rows, and the pattern of its fire hole d typically has two kinds, a kind of as alternate side by side for some bar seam in Figure 10
Being uniformly distributed, another kind such as Figure 11 is that two strip slots are uniformly distributed side by side.
As shown in figure 12, wall-hung boiler include by upper under install successively to smoke exhaust fan f, heat exchanger g and combustor h,
Atmospheric burner is arranged on bottom combustor h.During fuel gas buring, flame root area S1, flame can be formed in combustor h
High-temperature area S2 and Fire Radiation heat exchange area S3, is meanwhile divided into flame root area high corresponding for combustor height H
Degree H1, flame high-temperature area height H2 and Fire Radiation heat exchange area height H3.Owing to the flame of fire row root all concentrates on fire
In flame root area S1, its height is in the range of corresponding H1, high in S1 flame temperature, maximum temperature peak value T even occurs,
Being easy to the generation of thermal NO x, combustion-gas flow tissue is rapid, the generation of beneficially NOx；In S2, after burning, all heats are concentrated
In the range of H2, high-temperature area is relatively wide, increases the generation time of thermal NO x；In S3, high-temperature flue gas enters with heat exchanger g
Row heat exchange, the water of flowing in heating heat exchanger g, so that the temperature of high-temperature flue gas lowers, finally by smoke exhaust fan f
Discharge.
So the formation zone of NOx is mainly in S1 and S2 region after existing burner fuel gas buring, it is subject in S1 region
Fire row root maximum temperature and the impact of combustion-gas flow tissue, affected by vast high-temperature area occupied area in S2 region,
All promote the generation of NOx.
Summary of the invention
It is an object of the invention to provide one and can effectively reduce NOx emission content, make NOx emission standard meet environmental protection and want
The low-NOx combustor asked and the wall-hung boiler with this low-NOx combustor.
This low-NOx combustor that the present invention provides, including baffle plate and some fire rows being arranged parallel to, in this fire row
Be arranged over some fire holes, also include some lids of igniting, this ignite lid be arranged over some secondary fire holes, at lid of igniting
Two side on be equipped with secondary flash hole, described in lid interval of igniting be arranged on above fire row to be formed there is the secondary of double-deck fire hole
Mixed combustion fire row.
Described fire hole use horizontal bar shaped be uniformly distributed or circular hole and square hole combination be uniformly distributed.
Described secondary fire hole use horizontal bar shaped be uniformly distributed or circular hole and square hole combination be uniformly distributed.
The described height igniting lid is 5～15mm.
Described fire row and lid of igniting use stainless steel.
Propagate for ease of the flame in fire row of the present invention, the two side of described fire row is equipped with a flash hole.
Described baffle plate is fixed in fire row and the rear of lid of igniting.
Described horizontal bar shaped be uniformly distributed be two horizontal bar shapeds be one group and some groups of equally distributed structures.
Described circular hole and square hole combination be uniformly distributed be two circular holes, one square hole of folder be a small group, two subcombinations become one
Big group, some big group of equally distributed structures.
A kind of wall-hung boiler, including any of the above-described described low-NOx combustor.
Compared with prior art, the invention have the advantages that
1, by installing lid of igniting in the fire row at interval, form the secondary mixed combustion fire row with double-deck fire hole, make
Secondary mixed combustion fire row forms the structure of height fire row stratified combustion with fire row, and fire row is concentrated root temperature layering diffusion,
Reduce highest temperature region, make the temperature field of burning be distributed along high uniformity, effectively reduce the NOx generated by heating power type temperature and contain
Amount.
2, by installing lid of igniting in the fire row at interval, form the secondary mixed combustion fire row with double-deck fire hole, make
Secondary mixed combustion fire row forms the structure of height fire row burning spaced apart with fire row, and fire row concentrates root temperature interval to expand
Dissipating, reduce highest temperature region, make the temperature field of burning be uniformly distributed along the horizontal plane, effectively reduction is generated by heating power type temperature
NOx content.
3, by installing lid of igniting in the fire row at interval, form the secondary mixed combustion fire row with double-deck fire hole, make
Secondary mixed combustion fire row and fire row form height fire row stratified combustion and the double structure of interval burning, and fire row concentrates root temperature
Layering diffusion, interval diffusion, reduce highest temperature region so that the air current composition of fuel gas buring uniformly, steadily, the temperature of burning
Field is uniformly distributed in whole region, effectively reduces the NOx content generated by heating power type temperature.
4, by installing lid of igniting in the fire row at interval, form the secondary mixed combustion fire row with double-deck fire hole, make
Secondary mixed combustion fire row and fire row form height fire row stratified combustion and the double structure of interval burning so that fire row root area
Highly become big, under the same load, i.e. constant in combustor height and Fire Radiation heat exchange area height in the case of, reduce
Flame high-temperature area height, shortens the generation time in this region and the time of staying of thermal NO x, lowers NOx further
Content.
The present invention, by reducing fire row root maximum temperature and rationalization's combustion-gas flow, improves high-temperature region and generates and stop
Time, effectively lower the NOx content after burner fuel gas buring so that NOx content by three grades of discharge standards be reduced to level Four or
In the range of Pyatyi discharge standard, meet country and reduce discharging environmental protection policy, expand the range of applicability of product.
Accompanying drawing explanation
Fig. 1 is the structural representation of low-NOx combustor of the present invention.
Fig. 2 is the structural representation of Fig. 1 top view.
Fig. 3 is the structural representation of Fig. 1 left view.
Fig. 4 is the structural representation one amplified at Fig. 2 A.
Fig. 5 is the structural representation two amplified at Fig. 2 A.
Fig. 6 is combustion flame and the air current composition distributed architecture schematic diagram of low-NOx combustor in wall-hung boiler of the present invention.
Fig. 7 is the structural representation of existing atmospheric burner.
Fig. 8 is the structural representation of Fig. 7 top view.
Fig. 9 is the structural representation of Fig. 7 left view.
Figure 10 is the structural representation one amplified at Fig. 8 B.
Figure 11 is the structural representation two amplified at Fig. 8 B.
Figure 12 is combustion flame and the air current composition distributed architecture schematic diagram of atmospheric burner in existing wall-hung boiler.
Figure 13 is the growing amount relation schematic diagram with temperature of the thermal NO x with NO as representative.
Detailed description of the invention
From Fig. 1 to Fig. 5 it can be seen that this low-NOx combustor of the present invention, including support 1, some fire rows 2, baffle plate 3 and
Some lids 4 of igniting, what fire row 2 was parallel to each other is arranged on support 1, and lid 4 interval of igniting is arranged on above fire row 2, and baffle plate 3 is affixed
At fire row 2 and the rear of lid 4 of igniting, be arranged over some fire holes 21 in each fire row 2, lid 4 of igniting be arranged over some
Secondary fire hole 41, is equipped with secondary flash hole 42 on the two side of lid 4 of igniting, fire row 2 and be arranged on igniting above fire row 2
Lid 4 combination forms the secondary mixed combustion fire row 5 with double-deck fire hole.
In the present invention, the height D of lid 4 of igniting is 5～15mm, and fire row 2 and lid 4 of igniting all use stainless steel.
From figure 3, it can be seen that be equipped with a flash hole 22 on the two side of fire row 2 of the present invention.
From fig. 4, it can be seen that fire hole 21 and secondary fire hole 41 all use horizontal bar shaped to be uniformly distributed, it mainly shows as two
Laterally bar shaped is one group and some groups of equally distributed structures.
From fig. 5, it can be seen that fire hole 21 and secondary fire hole 41 all use circular hole and square hole combination to be uniformly distributed, its main table
Be now two circular holes, one square hole of folder be a small group, two subcombinations become a big group, some big group of equally distributed structures.
In the low-NOx combustor of the present invention, secondary mixed combustion fire row 5 and fire row 2 form height fire row stratified combustion
And the double structure of interval burning, fire row 2 is concentrated root temperature layering and interval diffusion, is reduced highest temperature region so that combustion gas
Uniformly, steadily, no matter the temperature field of burning is at height or to be all uniformly distributed at horizontal plane to the air current composition of burning, effectively drops
The low NOx content generated by heating power type temperature.
From fig. 6, it can be seen that this wall-hung boiler of the present invention, including to smoke exhaust fan 6, heat exchanger 7, combustor 8 and above-mentioned
Arbitrary described low-NOx combustor in embodiment, to smoke exhaust fan 6, heat exchanger 7 and combustor 8 by upper under install successively, low
NOx combustion device is arranged on the bottom of combustor 8.
As shown in Figure 6, in low-NOx combustor during fuel gas buring, flame root area S1 ', fire can be formed in combustor 8
Flame high-temperature area S2 ' and Fire Radiation heat exchange area S3 ', is meanwhile divided into flame root area by corresponding for combustor height H '
Territory height H1 ', flame high-temperature area height H2 ' and Fire Radiation heat exchange area height H3 ', the flame of fire row 2 root is all concentrated
In S1 ' region, its height is in the range of H1 ', high in this region flame temperature, maximum temperature peak value T ' even occurs.
By comparison diagram 6 and Figure 12 it can be seen that owing to using secondary mixed combustion fire row 5 and fire row 2 to form height fire
Row's stratified combustion and the double structure of interval burning so that fire row root flame distribution region becomes big (i.e. S1 ' is more than S1), and burns
Load is consistent, and i.e. in this region, heat is identical, and comparing ordinary burner has H1 ' more than H1.Occur in can deriving S1 ' region
There is maximum temperature peak value T in region in high-temperature peak value T ' S1 to be less than, and fuel gas buring air current composition compares ordinary burner
Also to become uniformly, this all promotes the growing amount of thermal NO x to reduce；And under the same load, heat exchanger is identical,
Identical to smoke exhaust fan, combustor height and combustion chamber volume are identical, i.e. Fire Radiation heat exchange area height H3 ' is equal to H3, H2 '
Less than H2, be equivalent to Fire Radiation heat exchange area S3 ' and less than S2, shorten thermal NO x equal to S3, flame high-temperature area S2 '
The generation time in this region and the time of staying, lower further the content of NOx so that NOx content is by three grades of discharge standards
In the range of being reduced to 4 grades or 5 grades of discharge standards.
Long-term test through my company draws, prior art is as follows with discharge standard test comparison of the present invention:
One, the NOx emission content measuring result of atmospheric burner and the levels of emissions such as table 1 of 1.25# nozzle are used:
Table 1:
Two, the NOx emission content measuring result of low-NOx combustor and the levels of emissions such as table 2 of 1.25# nozzle are used:
Table 2:
Three, the NOx emission content measuring result of low-NOx combustor and the levels of emissions such as table 3 of 1.35# nozzle are used:
Table 3:
According to the regulation of GB25034-2010 " gas-heating water heater ", in table 1 to table 3:
NOx (α=1) ppm=NOx ppm*11.9/CO2%；
NOx (mg/kw.h)=1.7554*NOx ppm*11.9/CO2%；
(NOx) NOx (mg/ under NOx (mg/kw.h) the * 0.15+60% rated load under pond=70% rated load
Kw.h) NOx (mg/kw.h) * 0.3 under NOx (mg/kw.h) the * 0.3+40% rated load under * 0.25+40% rated load；
Four, NOx emission grade (refers to the table in GB25034-2010 " gas-heating water heater " annex E as shown in table 4
E.1): table 4 NOx emission classification
| NOx emission classification | 1 | 2 | 3 | 4 | 5 |
| The NOx concentration upper limit (mg/kw.h) | 260 | 200 | 150 | 100 | 70 |
Five, the weight factor of measured value (refers in GB25034-2010 " gas-heating water heater " annex E as shown in table 5
Table E.2):
Table 5 weight factor
| Qpi (%) | 70% | 60% | 40% | 20% |
| Fpi | 0.15 | 0.25 | 0.30 | 0.30 |
Six, according to the regulation of GB25034-2010 " gas-heating water heater " annex E-E.3.5, at minimum thermal input and table
The NOx content that under the part heat input of 5 regulations, (all big than minimum thermal input) measures, by following equation weighted calculation: (NOx)
Pond=[(NOx) m] Qmin* ∑ Fpi (Q≤Qmin)+∑ [(NOx) m*Fpi], refers to GB25034-2010 " gas-heating heat
Water stove " formula (E.8) in annex E.
Claims (10)
1. a low-NOx combustor, including baffle plate (3) and some fire rows (2) being arranged parallel to, sets above this fire row
There are some fire holes (21), it is characterised in that: this burner also includes some lids (4) of igniting, if being arranged at this lid of igniting
Dry secondary fire hole (41), ignite lid two side on be equipped with secondary flash hole (42), described in ignite lid (4) be spaced be arranged on
Fire row (2) top forms secondary mixed combustion fire row (5) with double-deck fire hole.
Low-NOx combustor the most according to claim 1, it is characterised in that: described fire hole (21) uses horizontal bar shaped uniform
Distribution or circular hole and square hole combination are uniformly distributed.
Low-NOx combustor the most according to claim 1, it is characterised in that: described secondary fire hole (41) uses horizontal bar shaped
Be uniformly distributed or circular hole and square hole combination be uniformly distributed.
Low-NOx combustor the most according to claim 1, it is characterised in that the height of lid (4) of igniting described in: is 5～15mm.
Low-NOx combustor the most according to claim 1, it is characterised in that: described fire row (2) and lid (4) of igniting use not
Rust steel matter.
Low-NOx combustor the most according to claim 1, it is characterised in that: it is equipped with on the two side of described fire row (2)
Flash hole (22).
Low-NOx combustor the most according to claim 1, it is characterised in that: described baffle plate is fixed in fire row (2) and lid of igniting
(4) rear.
8. according to the low-NOx combustor described in Claims 2 or 3, it is characterised in that: it is two horizontal strokes that described horizontal bar shaped is uniformly distributed
It is one group and some groups of equally distributed structures to bar shaped.
9. according to the low-NOx combustor described in Claims 2 or 3, it is characterised in that: described circular hole and square hole combination are uniformly distributed
Be two circular holes, one square hole of folder be a small group, two subcombinations become a big group, some big group of equally distributed structures.
10. a wall-hung boiler, it is characterised in that: include arbitrary described low-NOx combustor in the claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610542167.XA CN106051764A (en) | 2016-07-11 | 2016-07-11 | Low NOx burner and wall-hanging stove provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610542167.XA CN106051764A (en) | 2016-07-11 | 2016-07-11 | Low NOx burner and wall-hanging stove provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106051764A true CN106051764A (en) | 2016-10-26 |
Family
ID=57185419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610542167.XA Pending CN106051764A (en) | 2016-07-11 | 2016-07-11 | Low NOx burner and wall-hanging stove provided with same |
Country Status (1)
| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895404A (en) * | 2020-07-01 | 2020-11-06 | 华帝股份有限公司 | Combustor with enhanced fire transmission function and heating stove using same |
| CN112066369A (en) * | 2019-06-10 | 2020-12-11 | 芜湖美的厨卫电器制造有限公司 | Combustor, hanging stove and water heater |
| CN116293667A (en) * | 2023-04-07 | 2023-06-23 | 西安交通大学 | Combustor with inclined high-low staggered fire hole plates |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63271010A (en) * | 1987-04-30 | 1988-11-08 | Toshiba Corp | Gas-fired equipment |
| CN102980190A (en) * | 2011-09-06 | 2013-03-20 | 中山炫能燃气科技股份有限公司 | Double-cavity burner |
| CN205174358U (en) * | 2015-12-02 | 2016-04-20 | 浙江普尔法智能电气有限公司 | Hanging is combustor for stove |
| CN205245175U (en) * | 2015-12-25 | 2016-05-18 | 北京汇通汇利技术开发有限公司 | A combustor for gas hanging stove |
| CN205825023U (en) * | 2016-07-11 | 2016-12-21 | 万家乐热能科技有限公司 | Low-NOx combustor and there is the wall-hung boiler of this low-NOx combustor |
-
2016
- 2016-07-11 CN CN201610542167.XA patent/CN106051764A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63271010A (en) * | 1987-04-30 | 1988-11-08 | Toshiba Corp | Gas-fired equipment |
| CN102980190A (en) * | 2011-09-06 | 2013-03-20 | 中山炫能燃气科技股份有限公司 | Double-cavity burner |
| CN205174358U (en) * | 2015-12-02 | 2016-04-20 | 浙江普尔法智能电气有限公司 | Hanging is combustor for stove |
| CN205245175U (en) * | 2015-12-25 | 2016-05-18 | 北京汇通汇利技术开发有限公司 | A combustor for gas hanging stove |
| CN205825023U (en) * | 2016-07-11 | 2016-12-21 | 万家乐热能科技有限公司 | Low-NOx combustor and there is the wall-hung boiler of this low-NOx combustor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066369A (en) * | 2019-06-10 | 2020-12-11 | 芜湖美的厨卫电器制造有限公司 | Combustor, hanging stove and water heater |
| CN112066369B (en) * | 2019-06-10 | 2022-10-04 | 芜湖美的厨卫电器制造有限公司 | Combustor, hanging stove and water heater |
| CN111895404A (en) * | 2020-07-01 | 2020-11-06 | 华帝股份有限公司 | Combustor with enhanced fire transmission function and heating stove using same |
| CN116293667A (en) * | 2023-04-07 | 2023-06-23 | 西安交通大学 | Combustor with inclined high-low staggered fire hole plates |
| CN116293667B (en) * | 2023-04-07 | 2024-01-30 | 西安交通大学 | Combustor with inclined high-low staggered fire hole plates |
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Application publication date: 20161026 |