CN209484591U - Water cooling premixing combustion apparatus - Google Patents
Water cooling premixing combustion apparatus Download PDFInfo
- Publication number
- CN209484591U CN209484591U CN201821648508.2U CN201821648508U CN209484591U CN 209484591 U CN209484591 U CN 209484591U CN 201821648508 U CN201821648508 U CN 201821648508U CN 209484591 U CN209484591 U CN 209484591U
- Authority
- CN
- China
- Prior art keywords
- water
- wall
- venthole
- gas
- firing cylinder
- 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 is water cooling premixing combustion apparatus, including burner and burner hearth, burner protrudes into freeze profile into an annular firing cylinder, the front end of annular firing cylinder is equipped with air intake and fuel gas inlet, air and combustion gas form mixed gas in annular firing cylinder, the end outer wall of annular firing cylinder is equipped with the venthole one of mixed gas, mixed gas forms main flame from the ejection of venthole one, main flame vertical is in annular firing cylinder, the inner wall of burner hearth is water-cooling wall, mixed gas burns to form main flame close to water-cooling wall, by the way that venthole and water-cooling wall away from annular firing drum outer wall certain distance is arranged in annular firing cylinder end outer wall, combustion flame can not only be stablized by water-cooling wall, rough burning is changed into stable burning under making premixed gas at venthole one by de- fiery state, and mixed gas can be made to burn close to water-cooling wall, The ignition temperature of flame is reduced by water-cooling wall, and then reduces NOx emission.
Description
Technical field
The utility model relates to burner technical fields, and in particular to water cooling premixing combustion apparatus.
Background technique
Nitrogen oxides formed acid rain, be one of ingredient of atmosphere pollution, at the same be also formed haze main component it
One, Beijing has promulgated new " emission standard of air pollutants for boilers ", it is specified that since on April 1st, 2017, all with combustion
Gas boiler emission limits of nitrogen oxides is 80mg/m3, creating gas fired-boiler emission limits of nitrogen oxides is 30mg/m3, this is just right
Current burner proposes low nitrogen requirement.
Low nitrogen burning control technology mainly reduces the formation of nitrogen oxides by reducing flame temperature at present.According to NOx
Formation mechanism, thermal NO, fuel NO and prompt NO can be classified as.Wherein, fuel
Type nitrogen oxides is that the oxynitrides in fuel generates in oxidation process, account for the 90% of entire combustion process production quantity with
On.
The characteristics of traditional premix combustion, is high for the liberation of flame, and can assign in the excess air coefficient of very little
To completely burned, therefore ignition temperature is very high.Since combustion gas and air have been pre-mixed, quickly, flame is shorter for burning velocity,
But stability is poor.
The condition of conventional burners burning: air velocity and burning velocity equalization point will be on the stable flame pans of burner, fire
Flame is stablized by stable flame pan, and flame temperature is cooling by radiation heat transfer, and cooling effect cannot drop to the generation of thermal NO
Although 1500 DEG C of temperature is hereinafter, realize that stablizing for burner is burnt, flame stabilization is relatively high, it is difficult to realize low NOx drainage.It passes
The heat-transfer surfaces such as the high-temperature flue gas contact furnace wall in system burner after the completion of combustion reaction, burn-off rate is poor, and CO formation is compared
It is more, tar is easily formed on furnace wall, is unfavorable for conducting heat.In addition to this, conventional burners require furnace diameter to be greater than flame diameter, furnace
Thorax length is greater than the length of flame.
Utility model content
The problem of that purpose of the utility model is to solve conventional burners NOx discharges is big, size of burner hearth is big, mentions
Water cooling premixing combustion apparatus is supplied.
To achieve the above object, the utility model uses following technical scheme:
Water cooling premixing combustion apparatus, including burner and burner hearth, the burner protrude into the freeze profile into an annular
The front end of combustion barrel, the annular firing cylinder is equipped with air intake and fuel gas inlet, and air and combustion gas are in the annular firing cylinder
Interior formation mixed gas, the end outer wall of the annular firing cylinder are equipped with the venthole one of mixed gas, the mixed gas from
The ejection of venthole one forms main flame, and the main flame vertical is water-cooling wall in the annular firing cylinder, the inner wall of the burner hearth,
Mixed gas burns to form main flame close to the water-cooling wall.
Further, the distance between outer wall of the water-cooling wall and the annular firing cylinder is 200-600mm.
Further, the outer wall of the annular firing cylinder is additionally provided with venthole two, the end anchor ring of the annular firing cylinder
Equipped with venthole three, the circulation area ratio of the venthole one, the venthole two and the venthole three is 5:1:1.
Further, the cooling medium of the water-cooling wall is one of water, conduction oil or air.
Further, injection plate is equipped at the air intake, the fuel gas inlet is gas nozzle, the gas nozzle
Adjacent with the injection plate, the burner includes air chamber and gas chamber, and the gas chamber is connected to the gas nozzle, combustion
Gas mixes at injection plate with air.
Further, the burner further includes air blower, and air enters the burner through the air blower and forms institute
State air chamber.
Further, the burner further includes gas inlet device, and the gas chamber is set to the gas inlet device
It is interior.
Further, mixing chamber is formed in the annular firing cylinder, enters the mixing chamber after air and combustion gas mixing.
Further, annular firing cylinder center is equipped with insulation board.
Compared with the prior art, the utility model has the following beneficial effects:
One, the device is by being arranged venthole one in annular firing cylinder end outer wall and apart from annular combustion barrel outer wall one
The water-cooling wall of set a distance can not only stablize combustion flame by water-cooling wall, make premixed gas at venthole one by de- fiery state
Lower rough burning is changed into stable burning, and mixed gas can be made when burning close to water-cooling wall, is dropped by water-cooling wall
The ignition temperature of low flame, and then reduce NOx emission；
Two, the stream that the device passes through the squit hole of the end outer wall of setting annular firing cylinder, outer wall middle part and end anchor ring
Logical area ratio, controls NOx discharge to minimum；
Three, the device combustion flame is stablized by water-cooling wall, and not relies on burner itself, is reducing NOx emission
While, further simplify the structure of conventional burners；
Four, the device combustion flame is short, flameholding, and heat transfer efficiency is high, boiler Dan Huicheng, and burner hearth is small, safety
Property it is high.
Detailed description of the invention
Fig. 1 is water cooling premixing combustion apparatus structure chart described in the utility model；
Fig. 2 is the structure chart of burner described in the utility model；
Fig. 3 is the side view of burner described in the utility model.
In figure: 1 being air blower, 2 be gas chamber, 4 be injection plate, 5 be gas nozzle, 7 be insulation board, 9 be water-cooling wall, 13
It is burner hearth for burner, 14,15 be annular firing cylinder, 16 be venthole one, 17 be venthole two, 18 is that venthole three, 19 is
Air chamber, 20 be gas inlet device, 21 be mixing chamber.
Specific embodiment
Explanation is further described to the technical solution of the utility model below by specific embodiment.
As shown in Figure 1-3, the present embodiment provides the device of water cooling premixed combustion, including burner 13 and burner hearth 14, burning
Device 13, which protrudes into, forms an annular firing cylinder 15 in burner hearth 14.The front end of annular firing cylinder 15 is equipped with air intake and fuel gas inlet,
Air and combustion gas form mixed gas in annular firing cylinder 15, and the end outer wall of annular firing cylinder 15 is equipped with going out for mixed gas
Stomata 1.Mixed gas forms main flame from the ejection of venthole 1, and main flame vertical is in annular firing cylinder 15.Burner hearth 14
Inner wall is water-cooling wall 9, and mixed gas forms main flame close to the burning of water-cooling wall 9.The opening shape of venthole 1 can be ring
Seam, circular hole, square hole etc..
When mixed gas is sprayed from venthole 1, the air velocity for controlling mixed gas is greater than burning velocity, makes to mix
Gas is in de- fiery state.Mixed gas will not burn at venthole 1, and combustion reaction occurs except venthole 1.It is empty
After the ejection of venthole 1, combustion instability, flame cannot continue for gas and the mixed gas of combustion gas.For make premixed gas by
Rough burning under de- fire state is changed into stable burning, the distance between the outer wall for the cold wall 9 and annular firing cylinder 15 of fetching water
For 200-600mm.Premixed flow washes away water-cooling wall 9 after the ejection of venthole 1 with certain speed, water-cooling wall 9 both stops to mix
It closes gas and the circumferential of mixed gas flame is propagated, and mixed gas can be made to stablize burning, while boiler may be designed as single time
Journey, the burner hearth of boiler are small, highly-safe.Combustion flame is stablized by water-cooling wall 9 and not leans on burner 13 in the present embodiment
Body further simplifies the structure of burner 13 compared with traditional technology.Mixed gas close to water-cooling wall 9 burn when, flame with
Water-cooling wall 9 contacts, and water-cooling wall 9 passes through the flame envelope temperature of heat transfer and the rapid cooling flame of rotating jet flow, to realize ultralow NOx
Discharge.Preferably, mixed gas is burnt at water-cooling wall 9 so that cooling effect is best, the burning position of specific main flame according to
Different working conditions determine.
Annular firing cylinder 15 is stainless steel material, and to prevent, the temperature of annular firing cylinder 15 is excessively high and deforms, annular firing
The outer wall of cylinder 15 is additionally provided with venthole 2 17, and the end anchor ring of annular firing cylinder 15 is equipped with venthole 3 18.Annular firing cylinder 15
Interior mixed gas is low-temperature condition, constantly washes away annular by the low-temperature mixed air-flow at venthole 2 17 and venthole 3 18
15 wall surface of combustion barrel, can reduce the temperature of annular firing cylinder 15.The air velocity etc. gone out through venthole 2 17 and venthole 3 18
It is formed about stable burning in burning velocity, and in venthole, the temperature of annular firing cylinder 15 is constantly absorbed by stablizing Combustion Energy
Degree.The opening shape of venthole 2 17 and venthole 3 18 is unlimited, for example, venthole 2 17 is waist hole, venthole 3 18 is spray
Mouth.
Sub-fraction mixed gas sprays after venthole 2 17 and venthole 3 18, and most mixed gas are through outlet
Hole 1 sprays and forms main fire close to the burning of water-cooling wall 9, while main fiery flame envelope is water cooled the cooling of wall 9, and flame temperature is lowered,
NOx discharge reduces.When the circulation area of venthole 1, venthole 2 17 and venthole 3 18 ratio is 5:1:1, NOx row
It high-volume can be controlled to 18mg/m3Hereinafter, the temperature of annular firing cylinder 15 also can control in reasonable range simultaneously.
The cooling medium of water-cooling wall 9 is one of water, conduction oil or air.Burner 13 is in addition to being used to heat water, also
It can be used to heat conduction oil or air.
15 front end air inlet of annular firing cylinder is equipped with injection plate 4, and 15 front end fuel gas inlet of annular firing cylinder is combustion gas
Nozzle 5, gas nozzle 5 are adjacent with injection plate 4.Burner 13 includes air chamber 19 and gas chamber 2, gas chamber 2 and gas nozzle
5 connections, combustion gas mix at injection plate 4 with air.Mixed gas forms vortex at injection plate 4, improves mixed effect.
Burner 13 further includes air blower 1, and air enters burner 13 through air blower 1 and forms air chamber 19.Burner 13
Further include gas inlet device 20, forms gas chamber 2 in gas inlet device 20.Mixing chamber 21 is formed in annular firing cylinder 15,
Enter mixing chamber 21 after air and combustion gas mixing.15 center of annular firing cylinder is equipped with insulation board 7, and insulation board 7 prevents annular firing
Heat in cylinder 15 is to external diffusion.
When specific works, air enters air chamber 19 by air blower 1, and combustion gas enters gas chamber 2 by gas inlet device 20,
Combustion gas mixes at injection plate 4 after being sprayed by gas nozzle 5 with air, and mixed gas enters mixed in annular firing cylinder 15
Chamber 21 is closed, a part of mixed gas sprays after-combustion through venthole 2 17 and venthole 3 18.Most of mixed gas is through outlet
After hole 1 sprays, it is water cooled wall 9 and stops and burn close to water-cooling wall 9, water-cooling wall 9 cools down to burned flame, and energy
Mixed gas is enough set to be changed into stable burning by original rough burning state, while flame temperature reduces, NOx discharge subtracts
It is few.
The embodiments of the present invention are described in detail above, for those of ordinary skill in the art, according to
According to thought provided by the utility model, will change in specific embodiment, and these changes also should be regarded as it is practical
Novel protection scope.
Claims (9)
1. water cooling premixing combustion apparatus, including burner (13) and burner hearth (14), it is characterised in that:
The burner (13), which is protruded into, forms an annular firing cylinder (15) in the burner hearth (14)；
The front end of the annular firing cylinder (15) is equipped with air intake and fuel gas inlet, and air and combustion gas are in the annular firing cylinder
(15) mixed gas is formed in, the end outer wall of the annular firing cylinder (15) is equipped with the venthole one (16) of mixed gas；
The mixed gas forms main flame from venthole one (16) ejection, and the main flame vertical is in the annular firing cylinder
(15)；
The inner wall of the burner hearth (14) is water-cooling wall (9), and the main flame is close to the water-cooling wall (9).
2. water cooling premixing combustion apparatus according to claim 1, it is characterised in that: the water-cooling wall (9) and the annular
The distance between outer wall of combustion barrel (15) is 200-600mm.
3. water cooling premixing combustion apparatus according to claim 1, it is characterised in that: the outer wall of the annular firing cylinder (15)
It is additionally provided with venthole two (17), the end anchor ring of the annular firing cylinder (15) is equipped with venthole three (18), the venthole one
(16), the circulation area ratio of the venthole two (17) and the venthole three (18) is 5:1:1.
4. water cooling premixing combustion apparatus according to claim 1, it is characterised in that:
The cooling medium of the water-cooling wall (9) is one of water, conduction oil or air.
5. water cooling premixing combustion apparatus according to claim 1, it is characterised in that: be equipped with injection plate at the air intake
(4), the fuel gas inlet is gas nozzle (5), and the gas nozzle (5) is adjacent with the injection plate (4)；
The burner (13) includes air chamber (19) and gas chamber (2), and the gas chamber (2) and the gas nozzle (5) are even
Logical, combustion gas mixes at injection plate (4) with air.
6. water cooling premixing combustion apparatus according to claim 5, it is characterised in that: the burner (13) further includes air blast
Machine (1), air enter the burner (13) through the air blower (1) and form the air chamber (19).
7. water cooling premixing combustion apparatus according to claim 6, it is characterised in that: the burner (13) further includes combustion gas
Inlet duct (20), the gas chamber (2) are set in the gas inlet device (20).
8. water cooling premixing combustion apparatus according to claim 1-5, it is characterised in that: the annular firing cylinder
(15) mixing chamber (21) are formed in, enter the mixing chamber (21) after air and combustion gas mixing.
9. water cooling premixing combustion apparatus according to claim 8, it is characterised in that: annular firing cylinder (15) center is set
There are insulation board (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821648508.2U CN209484591U (en) | 2018-10-11 | 2018-10-11 | Water cooling premixing combustion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821648508.2U CN209484591U (en) | 2018-10-11 | 2018-10-11 | Water cooling premixing combustion apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209484591U true CN209484591U (en) | 2019-10-11 |
Family
ID=68113941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821648508.2U Active CN209484591U (en) | 2018-10-11 | 2018-10-11 | Water cooling premixing combustion apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209484591U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442402A (en) * | 2018-10-11 | 2019-03-08 | 浙江力巨热能设备有限公司 | A kind of water cooling premixed combustion method and device |
-
2018
- 2018-10-11 CN CN201821648508.2U patent/CN209484591U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442402A (en) * | 2018-10-11 | 2019-03-08 | 浙江力巨热能设备有限公司 | A kind of water cooling premixed combustion method and device |
| CN109442402B (en) * | 2018-10-11 | 2024-06-04 | 浙江力巨热能设备有限公司 | Water-cooling premixed combustion method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204063038U (en) | Low NO xflue gas is from return flow burner | |
| CN205504983U (en) | Gas recirculation low NOx burner in combustion -supporting wind injection type stove | |
| CN107420892A (en) | A kind of outer circulation smoke backflow formula all-premixing burner | |
| CN205504984U (en) | Gas recirculation low NOx burner in gas injection type stove | |
| CN205447747U (en) | Ultralow NOx combustor of hot flue gas self -loopa type | |
| CN204478056U (en) | A kind of oil gas associating low-NOx combustor | |
| CN104595900A (en) | Low-nitrogen-oxide gas combustor and combustion method of combustor | |
| CN204704817U (en) | A kind of low nitrogen oxide gas burner | |
| CN105570890A (en) | Hot flue gas self-circulation type ultra-low NOx combustor | |
| CN109442411B (en) | Low-nitrogen burner for gas fuel | |
| CN205119061U (en) | Gas fractional combustion ware | |
| CN109654491A (en) | A kind of interior axial water-cooled premixing combustion apparatus | |
| CN107893991B (en) | Loop swirl-flow premixed multiple rows of array jetstream whirl penetrates the burner of accumulation of heat sleeve | |
| CN209484591U (en) | Water cooling premixing combustion apparatus | |
| CN107461742B (en) | Graded flameless low-nitrogen combustion head | |
| CN110145737A (en) | A kind of rotational-flow stable-flame radial spray low NO | |
| CN203375455U (en) | Preset type auxiliary combustion chamber combustor | |
| CN104132343A (en) | Radiant tube combustor | |
| CN208139261U (en) | A kind of ultralow oxides of nitrogen gas burner of smoke backflow | |
| CN109442402A (en) | A kind of water cooling premixed combustion method and device | |
| CN207702461U (en) | The novel super-low nitrogen combustion apparatus that a kind of non-premixed combustion and premixed combustion are combined | |
| CN206669731U (en) | A kind of premixed high-speed jet burner | |
| CN215411868U (en) | Cyclone flue gas recirculation gas burner | |
| CN103782098B (en) | For stablizing the device of dilute combustion in cold wall type combustor | |
| WO2020221366A1 (en) | Combustion assembly and wall-mounted stove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |