CN109579003A - A kind of low NOx neat gas burner of combined internal combustion type low temperature and combustion method - Google Patents
A kind of low NOx neat gas burner of combined internal combustion type low temperature and combustion method Download PDFInfo
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- CN109579003A CN109579003A CN201811329337.1A CN201811329337A CN109579003A CN 109579003 A CN109579003 A CN 109579003A CN 201811329337 A CN201811329337 A CN 201811329337A CN 109579003 A CN109579003 A CN 109579003A
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- internal combustion
- burner
- sub
- cooling air
- combustion chamber
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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
-
- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/78—Cooling burner parts
Abstract
It include sub- burner, internal combustion chamber sum aggregate flame device the present invention relates to a kind of low NOx neat gas burner of combined internal combustion type low temperature and combustion method, the burner；The internal combustion chamber is horizontally disposed, and multiple sub- burners are uniformly provided on the half circumference of internal combustion chamber one end, and the internal combustion chamber other end is equipped with outwardly projecting combustion product outlet；The outlet of sub- burner is tightly connected with set on the intracavitary corresponding collection flame device of internal combustion respectively, and the uniformly distributed multiple cooling air intakes of internal combustion chamber outer circumference close to sub- burner one end, cooling air intake is connected with cooling air pipeline respectively.The problem that ignition temperature is high, NOx discharge is high when the present invention is for burning natural gas in the prior art, it controls ignition temperature and is lower than 1250 DEG C, it realizes low NOx drainage, to realize natural gas clean combustion, is particularly suitable for the occasion that chamber length is limited or uses multiple combustion systems.
Description
Technical field
The present invention relates to field of combustion technology more particularly to a kind of low NOx neat gas burners of combined internal combustion type low temperature
And combustion method.
Background technique
Environmental pollution and using energy source problem have worldwide seriously threatened the survival and development of the mankind, fuel
Pollutant is increasingly subject to the close attention of people to the pollution of ecological environment in combustion product, reduces the row of burner pollutant
High-volume have become a vital task of combustion technology research.
The NOx that fuel generates in combustion is divided into three types with occurring source difference according to generation path: heating power type
NOx, Quick-type NOx, fuel type NOx.NOx is generated based on heating power type during combustion of natural gas, and NOx is generated in combustion process
Amount and actual combustion temperature be exponentially increased relationship, it is existing using air as the combustion of natural gas technology Actual combustion temperature of combustion adjuvant
About 1600~1700 DEG C of degree, NOx emission concentration is commonly greater than 230mg/Nm3Flue gas, the environmental protection for being difficult to meet NOx emission are wanted
It asks.The NOx of combustion of natural gas process generation can be effectively reduced using oxygen-enriched combustion technology, but operating cost will be greatly increased.
The Chinese patent of Patent No. CN201711294863.4 discloses " a kind of burner of low-nitrogen oxide discharging ",
The burner includes center rifle, side rifle, altar lamp, shell and bottom plate, the components such as center rifle, side rifle composition.Its working principle is that
Fuel quantity and air capacity and burning position are adjusted when NOx is exceeded, to realize the control of nitrogen oxides, but actually
It is difficult to make the actual combustion temperature of natural gas lower than 1400 DEG C.
The Chinese patent of Patent No. CN201711091217.8 discloses a kind of " low NO combustion of ultralow discharged nitrous oxides
The structures such as burner ", including refractory brick, shell, air inlet have flame height low, compact, and coefficient of excess air is small, the thermal efficiency
The features such as high.It substantially uses fuel gas classification, by fuel gas jet to the multiple regions for being from upstream to downstream, thus shape
At multiple combustion zones, disperse high-temperature area, the significant mixing for optimizing fuel and air, reaching, which reduced air, remains coefficient, mentions
The purpose of high thermal efficiency, but the technical solution is difficult to realize the low-temperature burning of natural gas when fuel uses natural gas.
The Chinese patent of Patent No. CN201710601777.7 discloses a kind of " joint-cutting eddy flow low nitrogen oxide burning
Device ", the burner is by fuel gas conduit, burner and combustion air transfer tube；Burner is circular cone.Its working principle is that being inhaled using fuel injection
The flue gas entered, which is sufficiently mixed, dilutes the concentration of oxygen, and the generation of NOx in flue gas is effectively inhibited to reduce disposal of pollutants.But in burning day
When right gas, actual combustion temperature can not be also reduced.
The shortcomings that above-mentioned technical proposal is when applying when using air as the combustion of natural gas process of combustion adjuvant, due to theory
Ignition temperature is high, is difficult to realize ignition temperature, thus nitrous oxides concentration is higher, especially fuel quantity demand it is big in the case where,
It is more difficult to realize low-temperature burning.On the other hand, many to use energy equipment using natural gas for fuel, operating temperature is well below natural
The ignition temperature of gas, such as: titanium dioxide rotary kiln end temperature is usually less than 1100 DEG C, thus develops one kind and can be realized natural gas
The technology of low-temperature burning has very high practical value.
Summary of the invention
The present invention provides a kind of low NOx neat gas burner of combined internal combustion type low temperature and combustion methods, for existing
The problem that ignition temperature is high when burning natural gas in technology, NOx discharge is high, control ignition temperature are lower than 1250 DEG C, overcome
The high disadvantage of existing internal combustion type burner combustion temperature, and realize low NOx drainage, thus realize natural gas clean combustion, it is especially suitable
The occasion of multiple combustion systems is limited or used for chamber length.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of low NOx neat gas burner of combined internal combustion type low temperature, including sub- burner, internal combustion chamber sum aggregate flame device；It is described
Internal combustion chamber is horizontally disposed, and multiple sub- burners are uniformly provided on the half circumference of internal combustion chamber one end, and the internal combustion chamber other end is equipped with
Outwardly projecting combustion product outlet；The outlet of sub- burner is tightly connected with set on the intracavitary corresponding collection flame device of internal combustion respectively,
Close to sub- burner one end the uniformly distributed multiple cooling air intakes of internal combustion chamber outer circumference, cooling air intake respectively with cooling
Air pipeline is connected.
The internal combustion chamber be it is columnar structured, the diameter of internal combustion chamber is 15~20 times of cooling air intake diameter.
The sub- burner is external-burning burner.
The quantity of the cooling air intake is 6, and the quantity of sub- burner is 6, cooling along the circumferencial direction of internal combustion chamber
Air intake is staggered with sub- burner, and sub- burner outlet diameter is 1/6th of cooling air intake diameter.
The collection flame device be it is columnar structured, be made of heat resisting steel or refractory material.
The flame device that integrates exports to the distance of combustion product outlet side headwall as the half of internal combustion cavity length, collects flame
The diameter of device is 2.5~5 times of sub- burner outlet diameter.
The diameter of the combustion product outlet is the 1/3~1/2 of internal combustion chamber diameter.
Combustion method based on a kind of low NOx neat gas burner of the described combined internal combustion type low temperature, comprising: natural gas
Enter collection flame device through the equally distributed multiple sub- burners in internal combustion chamber one end with air, natural gas is mixed with air in collection flame device inner edge
Side burning, air capacity and gas discharge are preferably in a proportion of 7~9.5:1；Cooling air cooled air pipeline is empty from cooling
Gas entrance enters the intracavitary portion of internal combustion, carries out cooling to staggered collection flame device and is heated in the process；Collect inside flame device
Temperature range is 800~1260 DEG C, and cooling air volume is 2.5~2.8 times of the total combustion air volume of sub- burner；Collect incomplete in flame device
The natural gas of burning burns away to form internal combustion flame after going out collection flame device, and internal combustion flame temperature range is 1260~1300 DEG C；It
Right gas completes the combustion product after burning and the gaseous mixture formed by the cooling air after the heating of collection flame device from combustion product
For being used with energy equipment, the gaseous mixture temperature range through combustion product outlet discharge is 1100~1200 DEG C for outlet discharge,
After deducting excess air, the concentration of emission of NOx is lower than 150mg/Nm in combustion product3Flue gas.
Compared with prior art, the beneficial effects of the present invention are:
1) problem that ignition temperature is high, NOx discharge is high when for burning natural gas in the prior art, controls ignition temperature
Lower than 1250 DEG C, low NOx drainage is realized, to realize natural gas clean combustion；
2) occasion of multiple combustion systems is limited or used present invention is particularly suitable for chamber length；
3) cooling air intake is consistent with collection flame device quantity, and the two is staggered, and can make to enter the intracavitary cooling of internal combustion
Air is fully cooled collection flame device, strengthens cooling effect；,
4) length for controlling cooling air volume sum aggregate flame device can guarantee that collecting flame device flame temperature is in target low model
In enclosing, the low-temperature burning that internal combustion combusts burning technology is realized；
5) ratio for the air capacity and amount of natural gas that control enters from sub- burner, due to concentration of natural gas reduction and cooling sky
The diluting effect of gas, imperfect combustion natural gas, which goes out to collect the flame temperature values formed after flame device, is in low temperature range, to subtract
The generation of few NOx.
Detailed description of the invention
Fig. 1 is a kind of main view of the low NOx neat gas burner of combined internal combustion type low temperature of the present invention.
Fig. 2 is the left view of Fig. 1.
In figure: 1. 3. cooling air pipeline of sub- 2. internal combustion chamber of burner, 4. cooling air intake 5. collects 6. internal combustion of flame device
7. combustion product outlet of flame
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
As shown in Figure 1 and Figure 2, the low NOx neat gas burner of a kind of combined internal combustion type low temperature of the present invention, including son
Burner 1,2 sum aggregate flame device 5 of internal combustion chamber；The internal combustion chamber 2 is horizontally disposed, uniformly sets on the half circumference of 2 one end of internal combustion chamber
There are multiple sub- burners 1,2 other end of internal combustion chamber is equipped with outwardly projecting combustion product outlet 7；The outlet of sub- burner 1 respectively with set
It is tightly connected in the corresponding collection flame device 5 in internal combustion chamber 2,2 outer circumference of internal combustion chamber close to sub- 1 one end of burner is uniformly distributed more
A cooling air intake 4, cooling air intake 4 are connected with cooling air pipeline 3 respectively.
The internal combustion chamber 2 be it is columnar structured, the diameter of internal combustion chamber 2 is 15~20 times of 4 diameter of cooling air intake.
The sub- burner 1 is external-burning burner.
The quantity of the cooling air intake 4 is 6, and the quantity of sub- burner 1 is 6, along the circumferencial direction of internal combustion chamber 2,
Cooling air intake 4 is staggered with sub- burner 1, and sub- 1 outlet diameter of burner is 1/6th of 4 diameter of cooling air intake.
The collection flame device 5 be it is columnar structured, be made of heat resisting steel or refractory material.
The flame device 5 that integrates exports to the distance of 7 side headwall of combustion product outlet as the half of 2 length of internal combustion chamber,
The diameter for collecting flame device 5 is 2.5~5 times of sub- 1 outlet diameter of burner.
The diameter of the combustion product outlet 7 is the 1/3~1/2 of 2 diameter of internal combustion chamber.
Combustion method based on a kind of low NOx neat gas burner of the described combined internal combustion type low temperature, comprising: natural gas
Enter collection flame device 5, natural gas and air in collection 5 inner edge of flame device through the equally distributed multiple sub- burners 1 in 2 one end of internal combustion chamber with air
The burning of mixing side, air capacity and gas discharge are preferably in a proportion of 7~9.5:1；Cooling air cooled air pipeline 3 is from cold
But air intake 4 enters inside internal combustion chamber 2, carries out cooling to staggered collection flame device 5 and is heated in the process；Collect flame
5 internal temperature range of device is 800~1260 DEG C, and cooling air volume is 2.5~2.8 times of the total combustion air volume of sub- burner 1；Collect flame device
Imperfect combustion natural gas burns away to form internal combustion flame 6 after going out collection flame device 5 in 5, and 6 temperature range of internal combustion flame is 1260
~1300 DEG C；Natural gas is completed the combustion product after burning and is mixed with the gaseous state formed by the cooling air after the heating of collection flame device 5
Object is discharged from combustion product outlet 7 for being used with energy equipment, and the gaseous mixture temperature range being discharged through combustion product outlet 7 is
1100~1200 DEG C, after deducting excess air, the concentration of emission of NOx is lower than 150mg/Nm in combustion product3Flue gas.
Following embodiment is implemented under the premise of the technical scheme of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
Not mentionleting alone bright is conventional method.
[embodiment 1]
In the present embodiment, 4 diameter of cooling air intake is 0.3m, and the quantity of cooling air intake is 6, and sub- burner 1 goes out
Mouth diameter is 0.05m, and the quantity of sub- burner 1 is 6, and collection flame device 5 is connected with the outlet of sub- burner 1, junction holding sealing；It
Right gas and air are exported from sub- burner 1 enters collection flame device 5, burns in mixing；Cooling air is out of cooling air intake 4 entrance
Chamber 2 is fired, carry out cooling to collection flame device 5 and is heated in the process；Imperfect combustion natural gas flows out subsequent from collection flame device 5
Afterflame burns to form internal combustion flame 6, and the combustion product after natural gas completely burned is mixed with by the cooling air after the heating of collection flame device
The mixed gas of formation is discharged from combustion product outlet 7 for being used with energy equipment.
The relevant parameter of 3 examples summarizes as shown in table 1, table 2 in the present embodiment:
Table 1
Table 2
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of low NOx neat gas burner of combined internal combustion type low temperature, which is characterized in that including sub- burner, internal combustion chamber sum aggregate
Flame device；The internal combustion chamber is horizontally disposed, and multiple sub- burners are uniformly provided on the half circumference of internal combustion chamber one end, and internal combustion chamber is another
One end is equipped with outwardly projecting combustion product outlet；The outlet of sub- burner is close with set on the intracavitary corresponding collection flame device of internal combustion respectively
Envelope connection, the uniformly distributed multiple cooling air intakes of internal combustion chamber outer circumference close to sub- burner one end, cooling air intake point
It is not connected with cooling air pipeline.
2. a kind of low NOx neat gas burner of combined internal combustion type low temperature according to claim 1, which is characterized in that institute
State internal combustion chamber be it is columnar structured, the diameter of internal combustion chamber is 15~20 times of cooling air intake diameter.
3. a kind of low NOx neat gas burner of combined internal combustion type low temperature according to claim 1, which is characterized in that institute
Stating sub- burner is external-burning burner.
4. a kind of low NOx neat gas burner of combined internal combustion type low temperature according to claim 1, which is characterized in that institute
The quantity for stating cooling air intake is 6, and the quantity of sub- burner is 6, along the circumferencial direction of internal combustion chamber, cooling air intake with
Sub- burner is staggered, and sub- burner outlet diameter is 1/6th of cooling air intake diameter.
5. a kind of low NOx neat gas burner of combined internal combustion type low temperature according to claim 1, which is characterized in that institute
State collection flame device be it is columnar structured, be made of heat resisting steel or refractory material.
6. a kind of low NOx neat gas burner of combined internal combustion type low temperature according to claim 1, which is characterized in that institute
It states and integrates flame device and export to the distance of combustion product outlet side headwall as the half of internal combustion cavity length, the diameter of collection flame device is
2.5~5 times of sub- burner outlet diameter.
7. a kind of low NOx neat gas burner of combined internal combustion type low temperature according to claim 1, which is characterized in that institute
The diameter for stating combustion product outlet is the 1/3~1/2 of internal combustion chamber diameter.
8. special based on a kind of combustion method of the low NOx neat gas burner of combined internal combustion type low temperature described in claim 1
Sign is, comprising: natural gas and air enter collection flame device through the equally distributed multiple sub- burners in internal combustion chamber one end, natural gas and empty
Gas is preferably in a proportion of 9.5~10.5:1 in the burning of collection flame device inner edge mixing side, air capacity and gas discharge；Cooling air warp
Cooling air pipeline enters the intracavitary portion of internal combustion from cooling air intake, carries out cooling to staggered collection flame device and in this process
In be heated；Collect flame device internal temperature range be 800~1260 DEG C, cooling air volume be the total combustion air volume of sub- burner 2.5~
2.8 again；Imperfect combustion natural gas burns away to form internal combustion flame after going out collection flame device in collection flame device, internal combustion flame temperature model
Enclose is 1260~1300 DEG C；The gas that natural gas is completed the combustion product after burning and formed by the cooling air after the heating of collection flame device
State mixture is discharged from combustion product outlet for being used with energy equipment, the gaseous mixture temperature model being discharged through combustion product outlet
Enclosing is 1100~1200 DEG C, and after deducting excess air, the concentration of emission of NOx is lower than 150mg/Nm in combustion product3Flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811329337.1A CN109579003B (en) | 2018-11-09 | 2018-11-09 | Combined internal combustion type low-temperature low-NOx natural gas burner and burning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811329337.1A CN109579003B (en) | 2018-11-09 | 2018-11-09 | Combined internal combustion type low-temperature low-NOx natural gas burner and burning method |
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| Publication Number | Publication Date |
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| CN109579003A true CN109579003A (en) | 2019-04-05 |
| CN109579003B CN109579003B (en) | 2020-06-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3113416A1 (en) * | 1981-04-03 | 1982-10-21 | Ruhrgas Ag, 4300 Essen | METHOD FOR OPERATING A GAS BURNER SUBJECT TO AIRFLOW AND BURNER FOR CARRYING OUT THE METHOD |
| JP2001304507A (en) * | 2000-04-20 | 2001-10-31 | Shuichi Yamamoto | Combustion device for large kettle |
| CN101706103A (en) * | 2009-12-11 | 2010-05-12 | 北京工业大学 | Efficient and energy-saving environment-friendly high-pressure burner |
| CN202501472U (en) * | 2011-12-21 | 2012-10-24 | 洛阳瑞昌石油化工设备有限公司 | Flat flame gas burner with low NOx emission |
| CN202884924U (en) * | 2012-10-23 | 2013-04-17 | 江苏中圣高科技产业有限公司 | Ground torch premixing type burner |
| CN206831493U (en) * | 2017-04-19 | 2018-01-02 | 安德森热能科技（苏州）有限责任公司 | A kind of burner block and the air classification flat-flame burner including the burner block |
-
2018
- 2018-11-09 CN CN201811329337.1A patent/CN109579003B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3113416A1 (en) * | 1981-04-03 | 1982-10-21 | Ruhrgas Ag, 4300 Essen | METHOD FOR OPERATING A GAS BURNER SUBJECT TO AIRFLOW AND BURNER FOR CARRYING OUT THE METHOD |
| JP2001304507A (en) * | 2000-04-20 | 2001-10-31 | Shuichi Yamamoto | Combustion device for large kettle |
| CN101706103A (en) * | 2009-12-11 | 2010-05-12 | 北京工业大学 | Efficient and energy-saving environment-friendly high-pressure burner |
| CN202501472U (en) * | 2011-12-21 | 2012-10-24 | 洛阳瑞昌石油化工设备有限公司 | Flat flame gas burner with low NOx emission |
| CN202884924U (en) * | 2012-10-23 | 2013-04-17 | 江苏中圣高科技产业有限公司 | Ground torch premixing type burner |
| CN206831493U (en) * | 2017-04-19 | 2018-01-02 | 安德森热能科技（苏州）有限责任公司 | A kind of burner block and the air classification flat-flame burner including the burner block |
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| CN109579003B (en) | 2020-06-23 |
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