CN110296400A - Low NO and its gas combustion apparatus - Google Patents
Low NO and its gas combustion apparatus Download PDFInfo
- Publication number
- CN110296400A CN110296400A CN201910704356.6A CN201910704356A CN110296400A CN 110296400 A CN110296400 A CN 110296400A CN 201910704356 A CN201910704356 A CN 201910704356A CN 110296400 A CN110296400 A CN 110296400A
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- Prior art keywords
- channel
- air supply
- shell
- low
- air
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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
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
-
- 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)
Abstract
The present invention relates to a kind of low NO and its gas combustion apparatus.Low NO includes shell, and injection channel, air supply channel, split channel, diffusion mixing chamber are equipped in shell, and shell is additionally provided with through-thickness through several water stream channels of setting；The air inlet in injection channel is for introducing combustion gas and air, the outlet side in injection channel is communicated by split channel with air supply channel, the air inlet in air supply channel is for introducing air, the gas outlet in air supply channel is connected to diffusion mixing chamber, and the top of shell is equipped with the crater communicated with diffusion mixing chamber.The present invention can effectively realize low-nitrogen oxide discharging, and structure is relatively easy, be conducive to control.
Description
Technical field
The present invention is a kind of low NO and its gas combustion apparatus, especially a kind of to be able to achieve the low of low-nitrogen oxide discharging
Nitrogen burner and its gas combustion apparatus.
Background technique
In existing Burner Technology, majority is normal atmospheric formula burner, NOXGas (nitrogen oxides) discharge amount is high,
It is unfavorable for low azo-cycle and protects emission request, the gas heater and burnt gas wall hanging furnace of European countries has been forced to carry out low nitrogen oxidation at present
Object emission request, it is anticipated that domestic in the near future also to develop towards low-nitrogen discharged direction.Have in industry at present using deep or light
Combustion technology realizes low-nitrogen oxide discharging, but existing shade burner mostly uses greatly the structure with double injector, as in
State's number of patent application is to disclose a kind of low NO in 201610526887.7 comprising has mixer etc., wherein mixing
Device includes cylinder and inner cylinder, and inner cylinder is equipped with combustion air spinning disk, air inlet cylinder, swirl vanes etc., it is ensured that combustion even is realized
Low-nitrogen oxide discharging, but its disadvantages are that structure is complicated, makes trouble, at high cost, and control it is inconvenient, it is difficult to guarantee to produce
The stability of moral character energy.
Summary of the invention
A kind of low NO and its gas combustion apparatus, this hair are provided it is an object of the invention to consider one of above problem
It is bright effectively to realize low-nitrogen oxide discharging, and structure is relatively easy, is conducive to control.
The technical scheme is that low NO of the invention, including shell, shell is interior to be equipped with injection channel, sky
Gas feed channel, split channel, diffusion mixing chamber, shell are additionally provided with through-thickness through several water stream channels of setting；
The air inlet in injection channel passes through split channel and air supply channel for introducing combustion gas and air, the outlet side in injection channel
It communicates, the air inlet in air supply channel is connected to diffusion mixing chamber, shell for introducing air, the gas outlet in air supply channel
Top be equipped with the crater that communicates with diffusion mixing chamber.
Gas combustion apparatus of the invention, including above-mentioned low NO.
The present invention is equipped with an injection channel, and air inlet when specific works in injection channel is correspondingly arranged gas nozzle,
Injection channel provides air-fuel mixture through air supply channel for diffusion mixing chamber, and air supply channel is that diffusion mixing chamber is additional
It provides air to be sufficiently pre-mixed, well-mixed premix gas realizes burning at crater, to guarantee that fuel sufficiently fires
It burns and utilizes, not only reduced CO discharge, but also be able to achieve low-nitrogen oxide discharging；By setting water stream channel Cooling Water circulate or
Water supplying pipe setting, the high heat generated in effective absorption burner by burning is carried out using cold water, is effectively reduced at crater
The ignition temperature of combustion zone, so as to further decrease the production quantity of NO, simultaneously because cold water absorbs the surface of shell in advance
Temperature reduces fuel combustion energy loss, to effectively increase energy conversion efficiency, effectively realizes energy-saving and emission-reduction.Due to
Only with an injection channel, also only need that (its need of work carries out circuit control using a gas nozzle in specifically used
System), it is opposite to control relatively easy, high reliablity using multiple injection channels and corresponding multiple gas nozzles, circuit program.
The present invention can effectively realize low-nitrogen oxide discharging, and structure is relatively easy, be conducive to control.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the main view of burner of the present invention；
Fig. 3 is the top view of burner of the present invention；
Fig. 4 is the M-M cross-sectional view in Fig. 2；
Fig. 5 is another design structure schematic diagram of fire output hole in burner of the present invention.
Specific embodiment
In conjunction with Fig. 1 to Fig. 4, a kind of low NO, including shell 100, shell 100 is interior to be equipped with injection channel 1, shunts and lead to
Road (11,12), air supply channel (21,22), diffusion mixing chamber 3, shell 100 are additionally provided with through-thickness through the three of setting
A water stream channel 5；For the air inlet in injection channel 1 for introducing combustion gas and air, the outlet side in injection channel 1 passes through split channel
(11,12) are communicated with air supply channel (21,22), diffusion mixing chamber 3, and the air inlet of air supply channel (21,22) is used for
Air is introduced, the gas outlet of air supply channel (21,22) is connected to diffusion mixing chamber 3, and the top of shell 100 is equipped with mixed with diffusion
Close the crater 6 that chamber 3 communicates.
The present invention is equipped with an injection channel 1, and air inlet when specific works in injection channel 1 is correspondingly arranged gas injection
Mouth, injection channel 1 are directly that diffusion mixing chamber 3 provides air-fuel mixture and mixes through air supply channel (21,22) for diffusion
It closes chamber 3 and air-fuel mixture is provided, air supply channel (21,22) are additionally provided air for diffusion mixing chamber 3 and are sufficiently premixed
It closing, well-mixed premix gas realizes burning at crater 6, to guarantee that full combustion of fuel utilizes, CO discharge had both been reduced,
It is able to achieve low-nitrogen oxide discharging again simultaneously.It circulates or is arranged in water stream channel 5 by setting 5 Cooling Water of water stream channel and supply water
Pipe, the high heat generated in effective absorption burner by burning is carried out using cold water, combustion zone at crater 6 is effectively reduced
Ignition temperature, simultaneously as cold water absorbs the surface temperature of shell in advance, subtracts so as to further decrease the production quantity of NO
Few fuel combustion energy loss, to effectively increase energy conversion efficiency, effectively realizes energy-saving and emission-reduction.Due to only with one
A injection channel also only needs in specifically used using a gas nozzle (its need of work carries out circuit control), relatively
Relatively easy, high reliablity is controlled using multiple injection channels and corresponding multiple gas nozzles, circuit program.Energy of the present invention
It effectively realizes low-nitrogen oxide discharging, and structure is relatively easy, is conducive to control.
In other embodiments, the quantity of water stream channel 5 is not limited to 3, can be 2, or the nature greater than 3
Number.
In one embodiment, injection channel 1 is designed using the ejector structure of field of combustion technology, therefore, injection
Channel 1 is provided with air-breathing contraction section 113, mixing section 112 and the diffuser 111 successively arranged along airflow direction.Injection channel 1
Diffuser 111 is used as outlet side.
In one embodiment, injection channel 1 is to be extended from the bottom end face of shell 100 toward top-direction, injection
The air inlet in channel 1 is located at the bottom end face of shell 100.Preferably, air supply channel (21,22) are also from shell 100
Bottom end face is extended toward top-direction, and the air inlet of air supply channel (21,22) is located at the bottom end face of shell 100.
It in view of the use environment of gas combustion apparatus, especially works under the strong air flow to be formed in blower, by the air inlet in injection channel 1
Mouthful, the air inlet of air supply channel (21,22) be respectively positioned on the bottom end face of shell 100, channel is extended toward top-direction,
The internal gas flow of this burner is more stable, it is ensured that stable combustion condition.
Certainly, injection channel 1 can also make other designs, for example, shell can be arranged in the air inlet in injection channel 1
100 side, and make L shape and be extended.Air supply channel (21,22) can also make other designs, for example, air supply is logical
The middle part of shell 100 or the side of shell 100 or air supply channel (21,22) are arranged in toward shell in the air inlet in road (21,22)
The bottom direction of body 100 protrudes from the air inlet in injection channel 1.
In a kind of wherein embodiment, split channel (11,12) extends from its air inlet toward the top-direction of shell 100 work
Setting；The area of section of the split channel (11,12) becomes larger along the direction that air inlet is directed toward gas outlet.The program from point
The extension mode and channel sized variation pattern of circulation road (11,12) limit, and on the one hand ensure that air-fuel mixture is more suitable
Diffusion mixing chamber 3 freely is flowed to, second aspect can make air-fuel mixture further mix in split channel (11,12),
Mixed effect is preferable.
In a kind of wherein embodiment, from flowing, mixing more reasonable angle, the gas outlet of the split channel is cut
Face area is 1.5 times~4.5 times of the area of section of the air inlet of the split channel.More preferably, the split channel (11,
12) area of section of gas outlet is 2.5 times of the area of section of the air inlet of the split channel (11,12).
In a kind of wherein embodiment, air supply channel (21,22) are equipped with along the conveying section that airflow direction is successively arranged
(212,222) and diffuser (211,221), any section of the diffuser (211,221) of the air supply channel (21,22)
Greater than any section of the conveying section (212,222) of the air supply channel (21,22)；The outlet of split channel (11,12)
Diffuser (211,221) of the mouth connection in air supply channel (21,22).The program is by the gas outlet of split channel (11,12)
Diffuser in air supply channel (21,22) is set, conducive to the introducing of air, and also it is abundant conducive to air-fuel mixture and air
Mixing.
As more specifically preferred design, internal diameter, the internal diameter of diffuser (211,221) of conveying section (212,222) are equal
It is become larger from airflow direction, the internal diameter that the internal diameter change rate of diffuser (211,221) is greater than conveying section (212,222) changes
Rate.The program is conducive to the flowing and diffusion of air.
In one embodiment, air supply channel (21,22), which are additionally provided with, is located at conveying section (212,222) along airflow direction
Preceding loudspeaker input section (213,223), the air inlet of loudspeaker input section (213,223) be air supply channel (21,22) into
Port.The program is that the structure of foundation injector is designed, preferably to introduce air.But air supply channel (21,
It 22) is not to be used in combination with gas nozzle for introducing air, therefore, each section of design of air supply channel (21,22) is simultaneously
The non-design parameter with injector is consistent.
Due to burner be usually in class rectangle body setting, in order to enable combustion even, sufficiently, therefore, above-mentioned shell 100 is set
There are two air supply channels: the first air supply channel 21, the second air supply channel 22.First air supply channel 21,
Two air supply channels 22 are symmetrically disposed in the two sides in injection channel 1, and the first air supply channel 21, the second air supply are logical
The gas outlet in road 22 is respectively communicated with the two sides of the bottom of diffusion mixing chamber 3.Correspondingly in other embodiments, shell 100 can be
More air supply channels are arranged in the two sides in injection channel 1, it is contemplated that gas circuit flowing smoothness is mixed with air-fuel mixture
It is more reasonable to be symmetrically arranged air supply channel in the two sides in injection channel 1 for uniformity.
Above-mentioned shell 100 is equipped with two split channels: the first split channel 11, the second split channel 12.First split channel
11, the second split channel 12 is symmetrically disposed in the two sides in injection channel 1, the first split channel 11 and the first air supply channel
21 corresponding connections, the connection corresponding with the second air supply channel 22 of the second split channel 12.Correspondingly in other embodiments, on
More split channels can be arranged in the outlet side two sides in injection channel 1 by stating shell 100, it is contemplated that gas circuit flow smoothness with
The uniformity of air-fuel mixture mixing, it is more reasonable to be symmetrically arranged split channel in the outlet side two sides in injection channel 1.
In a kind of wherein embodiment, the direction at top is directed toward along the bottom of shell 100, several water stream channels 5 are located at
Between diffusion mixing chamber 3 and injection channel 1.The program can preferably absorb burning by the rational position of restriction water stream channel 5
The heat of device, and the design of diffusion mixing chamber 3 is not influenced.
In a kind of wherein embodiment, the top end surface of above-mentioned shell 100 is equipped with several craters 6, this several go out
Burner 6 is arranged with equidistant or unequal spacing, and the width dimensions of each crater 6 are between 0.4-1.5mm, length dimension 4-
Between 15mm.Crater 6 can be plane-shaped structure, or other structures.As shown in figure 5, the longitudinal cross-section of crater 6
Shape is " V " structure；The crater 6 of " V " type structure may make flame more to gather, and the sound that burns further decreases.
Herein, several exponential quantities are for two, three or four or more.
In a kind of wherein embodiment, above-mentioned shell 100 is additionally provided with several die moulds 7 corresponding to diffusion mixing chamber 3.Pressure
Type 7 be to the outside of shell 100 to inward side to groove, die mould 7 is conducive to improve the intensity of shell 100, and can allow diffusion
The more uniform distribution of premix gas of mixing chamber 3, to realize flame height, air velocity, CO, NO of crater 6XIt discharges more equal
It is even.
In one embodiment, the sidewall surfaces of crater 6 are provided with catalyst, and the catalyst is noble metal or mistake
Cross metal hydride or transition metal oxide；Catalyst can effectively reduce the activation energy of air-gas mixture, while again
The molecule of mixture can be made to be enriched in the surface of the side wall of crater 6, to improve reaction speed, accelerate burn rate,
It can make organic exhaust gas that flameless combustion occur under the conditions of lower initiation temperature by means of catalyst, and oxygenolysis is CO2With
H2O realizes low CO even zero CO discharge, while releasing amount of heat, to achieve energy-saving and emission reduction purposes.
In a kind of wherein embodiment, above-mentioned shell 100 includes on same plate according to the first side wall portion being sequentially arranged
101, middle interconnecting piece 102 and second side wall portion 103；First middle interconnecting piece 102 is equipped with the crater 6；First side
The recess knot that wall portion 101 and second side wall portion 103 are stamped with identical channel design and are recessed from the inside to the outside
Structure；The first side wall portion 101 is bonded with second side wall portion 103 along the 102 two sides bending of middle interconnecting piece in opposite directions, is led to
It crosses the sunk structure and is configured with above-mentioned injection channel 1, split channel (11,12), diffusion mixing chamber 3 and air supply channel
(21,22) are configured with above-mentioned water stream channel 5 by channel design.The program provides the realization structure of shell 100, structure benefit
In simplified production technology.
The working principle of burner of the present invention is as follows: arrow direction represents gas flow direction in figure, and combustion gas is first from drawing
The spout for penetrating channel 1 projects, and combustion gas mixes with air air inlet 11 by the combustion gas in injection channel 1 and flows into, and combustion gas is being fired simultaneously
Gas mixes with air volume suck around air inlet 11 and enters in injection channel 1, and combustion gas and air carry out in injection channel 1
After preliminary premixing, the first split channel 11, the second split channel 12, the first split channel 11, the second split channel 12 are flowed into
Gaseous mixture further mix after flow into the first air supply channel 21, the second air supply channel 22, mix well with air
Diffusion mixing chamber 3 is flowed into afterwards, and gaseous mixture further mixes in diffusion mixing chamber 3, and well-mixed premixed flow enters crater 6
Place realizes full combustion, can effectively reduce the discharge amount of CO, NOX.
In one embodiment, a kind of gas combustion apparatus, including low NO described in any of the above-described embodiment.Combustion gas dress
It sets and can be gas heater or wall-hung boiler.
Gas combustion apparatus of the present invention, compared with the background art caused by the utility model has the advantages that due to including described low
Nitrogen burner, technical effect are brought by low NO, identical as the beneficial effect of low NO, without repeating.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.
It in the description of the present invention, it is to be understood that, can be with when an element is considered as " connection " another element
It is directly to another element or may be simultaneously present intermediary element.On the contrary, when element be referred to as " direct " with it is another
When element connects, intermediary element is not present.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of low NO, which is characterized in that including shell, injection channel is equipped in shell, air supply channel, is shunted
Channel, diffusion mixing chamber, shell are additionally provided with through-thickness through several water stream channels of setting；The air inlet in injection channel
For introducing combustion gas and air, the outlet side in injection channel is communicated by split channel with air supply channel, and air supply is logical
The air inlet in road is connected to diffusion mixing chamber for introducing air, the gas outlet in air supply channel, and the top of shell is equipped with and expansion
The crater that pressure mixing chamber communicates.
2. low NO according to claim 1, which is characterized in that the split channel is from its air inlet toward shell
Top-direction is extended；The area of section of the split channel becomes larger along the direction that air inlet is directed toward gas outlet.
3. shade burner according to claim 2, which is characterized in that the area of section of the gas outlet of the split channel
It is 1.5 times~4.5 times of the area of section of the air inlet of the split channel.
4. low NO according to claim 1, which is characterized in that air supply channel is equipped with along airflow direction successively
Any section of the conveying section of arrangement and diffuser, the diffuser in the air supply channel is greater than the air supply channel
Any section of conveying section；Diffuser of the gas outlet connection of split channel in air supply channel.
5. low NO according to claim 4, which is characterized in that the internal diameter of conveying section, diffuser internal diameter from
Airflow direction becomes larger, and the internal diameter change rate of diffuser is greater than the internal diameter change rate of conveying section.
6. low NO according to claim 1, which is characterized in that the direction at top is directed toward along the bottom of shell, if
Dry water stream channel is between diffusion mixing chamber and injection channel.
7. low NO according to claim 1, which is characterized in that above-mentioned shell is equipped with two air supply channels and two
Split channel, two air supply channels and two split channels are symmetrically disposed in the two sides in injection channel, two air supply channels
Gas outlet be respectively communicated with the two sides of the bottom of diffusion mixing chamber, two split channels are corresponded with two air supply channels and are connected to.
8. low NO according to claim 1, which is characterized in that the longitudinal section shape of above-mentioned crater is " V "
Structure.
9. low NO according to claim 1, which is characterized in that the shell includes on same plate according to sequentially setting
The first side wall portion, middle interconnecting piece and second side wall portion being equipped with；First middle interconnecting piece is equipped with the crater；Described first
The sunk structure that sidewall portion and second side wall portion are stamped with identical channel design and are recessed from the inside to the outside；Institute
It states the first side wall portion and is bonded in opposite directions with second side wall portion along middle interconnecting piece two sides bending, pass through the sunk structure
It is configured with above-mentioned injection channel, diffusion mixing chamber, split channel and air supply channel, above-mentioned water is configured with by channel design
Circulation road.
10. a kind of gas combustion apparatus, it is characterised in that including low NO as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910704356.6A CN110296400A (en) | 2019-07-31 | 2019-07-31 | Low NO and its gas combustion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910704356.6A CN110296400A (en) | 2019-07-31 | 2019-07-31 | Low NO and its gas combustion apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110296400A true CN110296400A (en) | 2019-10-01 |
Family
ID=68032413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910704356.6A Withdrawn CN110296400A (en) | 2019-07-31 | 2019-07-31 | Low NO and its gas combustion apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110296400A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114111034A (en) * | 2021-11-09 | 2022-03-01 | 同济大学 | Low-nitrogen hot air nozzle device with adjustable temperature |
-
2019
- 2019-07-31 CN CN201910704356.6A patent/CN110296400A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114111034A (en) * | 2021-11-09 | 2022-03-01 | 同济大学 | Low-nitrogen hot air nozzle device with adjustable temperature |
| CN114111034B (en) * | 2021-11-09 | 2023-03-28 | 同济大学 | Low-nitrogen hot air nozzle device with adjustable temperature |
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| PB01 | Publication | ||
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Application publication date: 20191001 |