CN107255274A - A kind of low nitrogen burner for gas boiler - Google Patents
A kind of low nitrogen burner for gas boiler Download PDFInfo
- Publication number
- CN107255274A CN107255274A CN201710373858.6A CN201710373858A CN107255274A CN 107255274 A CN107255274 A CN 107255274A CN 201710373858 A CN201710373858 A CN 201710373858A CN 107255274 A CN107255274 A CN 107255274A
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- China
- Prior art keywords
- air
- flow
- gas
- flow control
- control loop
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- 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 invention discloses a kind of low nitrogen burner for gas boiler, including mixing duct, igniter, metallic fiber combustion head, gas flow control loop, air flow control loop and comparison measurer, comparison measurer is arranged between gas flow control loop and air flow control loop, pass through adjustment of combustion gas flow control loop and air flow control loop, to control natural gas and air mass flow ratio, make mixed gas flow and ratio more stable, improve combustor efficiency and boiler combustion security；Using two sections of air supply modes, the pressure loss of primary air and combustion gas in twisted blade blender is supplemented, the degree of mixing of natural gas and air is improved, reduces metallic fiber combustion head temperature, flue gas is reduced in the holdup time of high-temperature region, effectively suppresses NOx generation；The air of swirl flow supply, circulates flame inside, strengthens the uniformity of flame temperature, improves combustor efficiency；The present invention has stronger novelty and wide applicability.
Description
Technical field
The present invention relates to a kind of burner, particularly a kind of low nitrogen burner for gas boiler.
Background technology
The energy consumption structure of China is mainly three macrofossil fuel, and the consumption of coal and oil became in decline in recent years
Gesture, and gas consumption is gradually increasing.With the exploitation in global range to natural gas, shale gas, the consumption of combustion gas is not
To continue to rise.Meanwhile, with expanding economy, the deterioration of environment and the exhaustion of resource, the efficient utilization and pollution of the energy
The discharge of thing becomes major issue.NOx is the major pollutants of air, and it has very big danger to human health and ecological environment
Evil.The waste gas produced in boiler combustion process is one of main source in air, therefore the low nitrogen of boiler-burner is transformed
It is significant.Gas flow mixes unstable with air mass flow in the prior art, causes combustion instability, not only influence life
Production safety, can also influence the thermal efficiency and NOx discharge, and due to combustion instability, control to primary air and burn into
Divide and require higher.
The content of the invention
For a kind of the not enough there is provided low nitrogen burner for gas boiler of existing gas burner technology, pass through stability contorting
Air and gas flow ratio, make combustion gas fully burn, and improve combustion stability, also improve security, reduce NOx generation,
Secondary air supply is used simultaneously, air is further sufficiently mixed with combustion gas, combustor efficiency is improved, existed while reducing flue gas
The residence time of high-temperature region, further suppress reduction NOx generation.
To realize above goal of the invention, the present invention provides following technical scheme：
The present invention provides a kind of low nitrogen burner for gas boiler, including mixing duct, igniter, metallic fiber combustion head,
Gas flow control loop, air flow control loop and comparison measurer, comparison measurer are arranged on gas flow control loop and air
Between flow control circuit；Gas flow control loop includes flow signal transmitter, flow controller and control valve, flow letter
Number transmitter is connected with flow controller signal, and flow controller is connected with control valve signal；Air flow control loop includes
Flow signal transmitter, flow controller, control valve, blower fan and air cleaner, blower fan one end are connected with air cleaner, separately
One end is connected with flow transmitter, and flow signal transmitter is connected with flow controller signal, and flow controller is believed with control valve
Number connection；Proportional flow control valve one end is connected with control valve, the primary air entrance and secondary sky of the other end respectively with mixing duct
Gas entrance connects；Mixing duct is fixed in igniter one end, and one end is goed deep into boiler；The flange of mixing duct is bolted
In on furnace wall；Metallic fiber combustion head one end through furnace wall with mixing duct is concentric installs, the other end is in boiler.
Further, twisted blade formula blender is installed in mixing duct in primary air mixation tube section.
Further, swirling flow producing apparatus is installed in mixing duct in auxiliary air mixation tube section.
Further, the primary air and the ratio of auxiliary air that proportional flow control valve is distributed are 1:1 to 10:It is continuous in 1
Section.
Further, the primary air and the ratio of auxiliary air that proportional flow control valve is distributed are 4:1.
The present invention also provides a kind of gas fired-boiler, at least including the above-mentioned low nitrogen burner for gas boiler of any one.
The beneficial effects of the invention are as follows：Control can effectively be stablized by gas flow control loop and air flow control loop
Ratio between gas flow and air mass flow processed, makes mixed gas flow steady, can improve combustor efficiency, reduces NOx
Discharge capacity, improve boiler security in combustion.By two sections of supply modes of air can further make combustion gas with
Air is sufficiently mixed, and can reduce the temperature of metallic fiber combustion head, and supplement primary air and combustion gas are mixed in twisted blade
Pressure and speed loss in device, make gaseous mixture flow into burner hearth at a high speed, reduce high-temperature flue gas in the holdup time of high-temperature region, effectively
Suppress NOx generation；The air of swirl flow supply, circulates flame inside, strengthens the uniformity of flame temperature,
Improve combustor efficiency；.
Brief description of the drawings
Fig. 1 is complete machine front view of the invention；
In figure：1- comparison measurers, 2- flow signal transmitters, 3- flow controllers, 4- control valves, 5- gas sources, 6- is turned round
Bent blade-type mixer, 7- swirling flow producing apparatus, 8- mixing ducts, 9- metallic fiber combustion heads, 10- igniters, 11- blower fans,
12- air cleaners, 13- control valves, 14- flow signal transmitters, 15- flow controllers, 16- proportional flow control valves.
Embodiment
With reference to the accompanying drawings and examples, technical scheme is described in further detail.
Referring to Fig. 1, flow signal transmitter 2, flow controller 3, control valve 4 and gas source 5 constitute gas flow
Control loop；Flow signal transmitter 14, flow controller 15, control valve 13, blower fan 11 and air cleaner 12 constitute sky
Throughput control loop；Comparison measurer 1 is set in the middle of gas flow control loop and air flow control loop；Proportional flow control valve 16
One end is connected with air flow control loop, the primary air entrance and auxiliary air entrance of the other end respectively with mixing duct 8
Connect；Mixing duct 8 is fixed in the one end of igniter 10, and one end is goed deep into boiler；The one end of metallic fiber combustion head 9 through furnace wall and
Mixing duct 8 is installed with one heart, and the other end is located in boiler.
When the gas flow change of gas source 5, on the one hand flow signal transmitter 2 transmits the flow signal measured
Gas flow is controlled to flow controller 3, gas flow is maintained in setting value, sky is on the other hand used as by comparison measurer 1
The setting value in air-flow amount controller loop so that air mass flow keeps fixed ratio with gas flow；It is empty when gas flow is stable
When throughput changes, the flow signal measured is transferred to flow controller 15 and controls air stream by flow signal transmitter 14
Amount, makes its flow be maintained in setting value so that air mass flow and gas flow keep fixed ratio, realize gas flow and
The accurate control of the empty flow ratio of combustion, enhances the antijamming capability of gas flow.
In the present embodiment, twisted blade formula blender 6 has been installed in mixing duct 8 in primary air mixing duct additional, improved
The blending characteristic of combustion gas and First air, can effectively reduce the NOx generation amount during fuel gas buring.
Swirling flow producing apparatus 7 is installed in mixing duct 8 in auxiliary air mixing duct additional, by auxiliary air with strength rotational flow
Mode flows out, and produces larger negative pressure in the center of blender, circulates flame inside, it is ensured that flame temperature
Uniformity, improves combustor efficiency.
The present embodiment employs two sections of supply modes of air, the distribution flow of passing ratio flow valve 16, proportional flow control valve 16
The primary air of distribution and the ratio of auxiliary air are 1:1 to 10:Continuous section in 1, adjustability is higher, and best proportion is 4:
1.It is sufficiently mixed in primary air and combustion gas twisted blade blender 6, auxiliary air is from the outlet of twisted blade blender 6
Surrounding enters metallic fiber combustion head 9, can not only reduce the temperature of metallic fiber combustion head 9, and can supplement primary air
With pressure of the combustion gas in twisted blade blender and speed loss, gaseous mixture is flowed into burner hearth at a high speed, reduce flue gas in high temperature
The holdup time in area, further reduce NOx growing amount.
It should be noted that：Embodiments of the invention are preferred embodiment, rather than its limitations.It should be pointed out that for
, under the premise without departing from the principles of the invention, can also be to embodiment for those skilled in the art
Modify or equivalent substitution is carried out to some technical characteristics, it is regarded as in protection scope of the present invention.
Claims (6)
1. a kind of low nitrogen burner for gas boiler, including mixing duct (8), igniter (10), metallic fiber combustion head (9), combustion
Throughput control loop, air flow control loop and comparison measurer (1), it is characterised in that：Described comparison measurer (1) is arranged on combustion
Between throughput control loop and air flow control loop；The gas flow control loop includes flow signal transmitter
(2), flow controller (3) and control valve (4), flow signal transmitter (2) are connected with flow controller (3) signal, flow control
Device (3) processed is connected with control valve (4) signal；The air flow control loop includes flow signal transmitter (14), flow control
Device (15) processed, control valve (13), blower fan (11) and air cleaner (12), described blower fan (11) one end and air cleaner
(12) it is connected, the other end is connected with flow transmitter (14), flow signal transmitter (14) connects with flow controller (15) signal
Connect, flow controller (15) is connected with control valve (13) signal；Proportional flow control valve (16) one end is connected with control valve (13), another
End connects with the primary air entrance and auxiliary air entrance of mixing duct (8) respectively；Described igniter (10) one end is fixed on
Mixing duct (8), one end is goed deep into boiler；The flange of described mixing duct (8) is secured by bolts on furnace wall；The gold
Belong to fiber combustion head (9) one end to install through furnace wall and mixing duct (8) are concentric, the other end is located in boiler.
2. low nitrogen burner for gas boiler according to claim 1, it is characterised in that：One in described mixing duct (8)
Twisted blade formula blender (6) is installed in secondary air mixation tube section.
3. low nitrogen burner for gas boiler according to claim 1 or 2, it is characterised in that：In described mixing duct (8)
Swirling flow producing apparatus (7) is installed in auxiliary air mixation tube section.
4. low nitrogen burner for gas boiler according to claim 1, it is characterised in that：Described proportional flow control valve (16) can
The ratio for distributing primary air and auxiliary air is 1:1 to 10:Continuous section in 1.
5. the low nitrogen burner for gas boiler according to claim 1 or 4, it is characterised in that：Described proportional flow control valve
(16) ratio that can distribute primary air and auxiliary air is 4:1.
6. a kind of gas fired-boiler, it is characterised in that：It at least includes the low nitrogen gas-fired boiler as any one of claim 1-5
Burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373858.6A CN107255274A (en) | 2017-05-24 | 2017-05-24 | A kind of low nitrogen burner for gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373858.6A CN107255274A (en) | 2017-05-24 | 2017-05-24 | A kind of low nitrogen burner for gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107255274A true CN107255274A (en) | 2017-10-17 |
Family
ID=60028006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710373858.6A Pending CN107255274A (en) | 2017-05-24 | 2017-05-24 | A kind of low nitrogen burner for gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107255274A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848991A (en) * | 2019-11-27 | 2020-02-28 | 江苏信燃智控科技有限公司 | High blast furnace gas boiler ignition of security |
| CN113883510A (en) * | 2021-11-08 | 2022-01-04 | 上海电机学院 | Gas inlet device for promoting gas-air mixing emission reduction based on connection distortion mapping |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1061915A (en) * | 1996-08-17 | 1998-03-06 | Osaka Gas Co Ltd | Burner for heating furnace |
| CN2379705Y (en) * | 1999-06-04 | 2000-05-24 | 重庆钢铁设计研究院 | Low nitrogen oxides and flame adjustable burner nozzle |
| DE19941978A1 (en) * | 1999-09-03 | 2001-03-15 | Stiebel Eltron Gmbh & Co Kg | Production of synthesis gas for operating fuel cell from fuel involves regulation to ensure over-stoichiometric air supply for start-up, then incomplete combustion after start-up |
| CN1509391A (en) * | 2001-03-23 | 2004-06-30 | �����Ӳ��������������ι�˾ | Method and apparatus for setting air ratio |
| JP2006242399A (en) * | 2005-02-28 | 2006-09-14 | Mitsubishi Heavy Ind Ltd | Combustion equipment and combustion method by combustion equipment |
| CN201162030Y (en) * | 2008-03-11 | 2008-12-10 | 上海宝钢工程技术有限公司 | Radiant tube heating apparatus |
| EP2090827A2 (en) * | 2008-02-18 | 2009-08-19 | Honeywell Technologies Sarl ECC | Regulator for gas burner |
| CN201925947U (en) * | 2011-01-28 | 2011-08-10 | 佛山市启迪节能科技有限公司 | Automatic control device of premixed-type secondary air-compensating combustor |
| DE102009058453B4 (en) * | 2009-12-16 | 2011-09-01 | Robert Bosch Gmbh | Gas blower burner with modulable burner power and method for operating a gas blower burner |
| US20130115563A1 (en) * | 2011-11-07 | 2013-05-09 | Honeywell Technologies Sarl, Z.A. | Method for operating a gas burner |
| JP5427440B2 (en) * | 2009-03-11 | 2014-02-26 | アズビル株式会社 | Burning burner |
| CN104896474A (en) * | 2015-06-18 | 2015-09-09 | 孙永伟 | Modified domestic gas stove with gas and air premixing function |
| CN106152167A (en) * | 2015-04-02 | 2016-11-23 | 王毅君 | A kind of oxygen-enriched combustion-supporting application system |
-
2017
- 2017-05-24 CN CN201710373858.6A patent/CN107255274A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1061915A (en) * | 1996-08-17 | 1998-03-06 | Osaka Gas Co Ltd | Burner for heating furnace |
| CN2379705Y (en) * | 1999-06-04 | 2000-05-24 | 重庆钢铁设计研究院 | Low nitrogen oxides and flame adjustable burner nozzle |
| DE19941978A1 (en) * | 1999-09-03 | 2001-03-15 | Stiebel Eltron Gmbh & Co Kg | Production of synthesis gas for operating fuel cell from fuel involves regulation to ensure over-stoichiometric air supply for start-up, then incomplete combustion after start-up |
| CN1509391A (en) * | 2001-03-23 | 2004-06-30 | �����Ӳ��������������ι�˾ | Method and apparatus for setting air ratio |
| JP2006242399A (en) * | 2005-02-28 | 2006-09-14 | Mitsubishi Heavy Ind Ltd | Combustion equipment and combustion method by combustion equipment |
| EP2090827A2 (en) * | 2008-02-18 | 2009-08-19 | Honeywell Technologies Sarl ECC | Regulator for gas burner |
| CN201162030Y (en) * | 2008-03-11 | 2008-12-10 | 上海宝钢工程技术有限公司 | Radiant tube heating apparatus |
| JP5427440B2 (en) * | 2009-03-11 | 2014-02-26 | アズビル株式会社 | Burning burner |
| DE102009058453B4 (en) * | 2009-12-16 | 2011-09-01 | Robert Bosch Gmbh | Gas blower burner with modulable burner power and method for operating a gas blower burner |
| CN201925947U (en) * | 2011-01-28 | 2011-08-10 | 佛山市启迪节能科技有限公司 | Automatic control device of premixed-type secondary air-compensating combustor |
| US20130115563A1 (en) * | 2011-11-07 | 2013-05-09 | Honeywell Technologies Sarl, Z.A. | Method for operating a gas burner |
| CN106152167A (en) * | 2015-04-02 | 2016-11-23 | 王毅君 | A kind of oxygen-enriched combustion-supporting application system |
| CN104896474A (en) * | 2015-06-18 | 2015-09-09 | 孙永伟 | Modified domestic gas stove with gas and air premixing function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848991A (en) * | 2019-11-27 | 2020-02-28 | 江苏信燃智控科技有限公司 | High blast furnace gas boiler ignition of security |
| CN113883510A (en) * | 2021-11-08 | 2022-01-04 | 上海电机学院 | Gas inlet device for promoting gas-air mixing emission reduction based on connection distortion mapping |
| CN113883510B (en) * | 2021-11-08 | 2023-11-14 | 上海电机学院 | Air inlet device for promoting gas-air mixing and emission reduction based on connection distortion mapping |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171017 |