CN101749701B - Diffusion combustion burner - Google Patents
Diffusion combustion burner Download PDFInfo
- Publication number
- CN101749701B CN101749701B CN2009102249817A CN200910224981A CN101749701B CN 101749701 B CN101749701 B CN 101749701B CN 2009102249817 A CN2009102249817 A CN 2009102249817A CN 200910224981 A CN200910224981 A CN 200910224981A CN 101749701 B CN101749701 B CN 101749701B
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- Prior art keywords
- air
- primary
- primary air
- temperature
- main chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/04—Regulating air supply or draught by operation of single valves or dampers by temperature sensitive elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2700/00—Special arrangements for combustion apparatus using fluent fuel
- F23C2700/02—Combustion apparatus using liquid fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The present invention provides a diffusion combustion burner which can use liquid fuel. The diffusion combustion burner (1) according to the invention comprises the following components: a primary combustion chamber (4) which has an opening that faces a main combustion chamber (2); a combustion guiding nozzle (5) which is provided at the primary combustion chamber (4); a fuel nozzle (6) which injects fuel to the primary combustion chamber (4); a primary air supply path (7) which supplies primary air around the fuel nozzle (6) along the fuel nozzle (6); and a secondary air supply path (8) which injects secondary air next to the primary combustion chamber (4) into the main combustion chamber (2). The diffusion combustion burner (1) is provided with a primary air ration adjusting device which adjusts the ratio of the primary air relatively to the total amount of the primary air and the secondary air, namely the primary air ratio, to a higher value when the temperature of the main combustion chamber is lower, and adjusts the ratio to a lower value when the temperature of the main combustion chamber is higher.
Description
Technical field
The present invention relates to a kind of diffusion combustion burner.
Background technology
Disclosed a kind of diffusion combustion burner in patent documentation 1, it is in combustion chamber inner direct fuel and air and the diffusion combustion burner that makes it to burn, to towards the main chamber opening and be provided with primary zone's direct fuel injection and the primary air of pilot burner (pilot burner), from spraying auxiliary air to main chamber near the primary zone.
In addition, disclosed a kind of diffusion combustion burner in patent documentation 2, the discharge road alternation (alternating operation) of the supply road of its auxiliary air and exhaust gas, and be equipped with respectively heat storage.
The diffusion combustion burner of above-mentioned accumulation of heat alternative expression (regenerative type) acts as a fuel to gas and has practicality, but still impracticable to liquid fuel.Especially, burning burner capacious demand in the use that acts as a fuel with heavy oil is very large.But, the fuel that is ejected is temporarily vaporized, therefore, particularly when low temperature, fluent material can be lighted a fire slow and burning rapidly, and the unfavorable conditions such as imperfect combustion and carbon adhere on furnace wall (furnace wall) (particularly primary combustion chamber interior walls) occur.
Patent documentation 1: Japan Patent JP 8-26970 communique
Patent documentation 2: Japanese Patent Laid-Open 2007-24335 communique
Summary of the invention
In view of the above problems, the present invention is to provide a kind of diffusion combustion burner of liquid fuel that can use as problem.
For solving above-mentioned problem, diffusion combustion burner of the present invention has: the primary zone, and it is to the main chamber opening; Pilot burner, it is located at above-mentioned primary zone; Fuel nozzle, it is to above-mentioned primary zone burner oil; Primary air is supplied with the road, and it supplies with primary air along above-mentioned fuel nozzle around above-mentioned fuel nozzle; Auxiliary air is supplied with the road, and it sprays auxiliary air near the of above-mentioned primary zone in above-mentioned main chamber; Primary air is than adjusting device, its with above-mentioned primary air with respect to the ratio of the total amount of above-mentioned primary air and auxiliary air, be primary air than heightening when the temperature of above-mentioned main chamber is low, turn down when the temperature of above-mentioned main chamber is higher.
According to said structure, heighten the primary air ratio when low temperature, the fuel that is ejected is impaled with primary air, thereby the fuel deposition that prevents incomplete combustion particularly prevents from adhering to carbon on the inwall of primary zone on the furnace wall.In addition, when fuel is easily vaporized and held incendive high temperature, turn down the primary air ratio, thereby can reduce NO
x
In addition, if diffusion combustion burner of the present invention also has the air-flow revolving gear that makes the convolution around above-mentioned fuel nozzle of above-mentioned primary air, gyration airflow can become gas curtain (air curtain) and fuel is wrapped into, and therefore can improve the effect that anti-blocking adheres on the inwall of above-mentioned primary zone.
In addition, in diffusion combustion burner of the present invention, if the above-mentioned primary air ratio the when temperature of above-mentioned main chamber is hanged down is made as more than 5%, comparatively it is desirable to be made as more than 10%, can prevent effectively that blocking adheres on the inwall of above-mentioned primary zone.In addition, by above-mentioned primary air ratio is made as below 40%, can be with NO
xGeneration be suppressed in the prescribed limit of the decree relevant to industrial furnace.
In addition, in diffusion combustion burner of the present invention, if the above-mentioned primary air ratio during above-mentioned main chamber high than temperature is below 10%, can obtain sufficient NO
xInhibition.
In addition, in diffusion combustion burner of the present invention, if alternately be also used as the stream that the exhaust of burning gases uses and a plurality of above-mentioned auxiliary airs are set supply with the road, and supply with importing above-mentioned auxiliary air in road by heat storage to above-mentioned auxiliary air respectively, can by the heat that reclaims from exhaust gas with above-mentioned auxiliary air preheating, therefore can improve the thermal efficiency in heat storage.And, when the temperature of above-mentioned main chamber is higher, recently improves the ratio of auxiliary air owing to turning down above-mentioned primary air, so can further improve the thermal efficiency.
As mentioned above, in diffusion combustion burner of the present invention, when the temperature of main chamber is low, by heightening the primary air ratio, primary air becomes gas curtain, and the fuel deposition that can prevent from being ejected is on the inwall of primary zone, and the main chamber temperature is turned down primary air and is recently suppressed NO when higher
x, and the heat recovery efficiency of raising heat storage.
Description of drawings
Fig. 1 means the cutaway view of structure of the diffusion combustion burner of an embodiment of the present invention.
Fig. 2 mean in the diffusion combustion burner of Fig. 1 primary air than and NO
xThe curve map of the relation between concentration.
(symbol description)
1 diffusion combustion burner
2 main chambers
3 furnace walls
4 primary zones
5 pilot burners
6 fuel nozzles
7 primary airs are supplied with the road
8 auxiliary airs are supplied with the road
9 heat storages
10 storage heaters
The 11 convolution wings (air-flow revolving gear)
12 air blasts
13 main supply air doors
14 increments are supplied with air door
15 Temperature Detectors
The specific embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.Fig. 1 represents the diffusion combustion burner 1 of an embodiment of the present invention.Diffusion combustion burner 1 is formed at the furnace wall 3 of delimiting main chamber 2.Diffusion combustion burner 1 has: primary zone 4, and it is formed by the recess that forms on furnace wall 3 in main chamber 2 upper sheds; Pilot burner 5, its in the primary zone 4 interior formation as the flame of incendiary source; Fuel nozzle 6, it passes through primary zone 4 to the interior burner oil of main chamber 2; Primary air is supplied with road 7, and its pipe by the outside that is flush-mounted in fuel nozzle 6 forms, and supplies with primary air around fuel nozzle 6; A plurality of auxiliary airs are supplied with road 8 (only illustrating), its can be from the primary zone near 4 to the interior injection auxiliary air of main chamber 2; A plurality of storage heaters 10 (only illustrating one), it has respectively heat storage 9, supplies with road 8 with auxiliary air and is communicated with, and can supply with road 8 feeding secondary airs to auxiliary air by heat storage 9.
An auxiliary air supply road 8 and a storage heater 10 are a cover, have at least in order a cover to use as the air-breathing road of auxiliary air, and other have a cover at least as the exhaust line use of burning and gas-exhausting simultaneously.When heat storage 9 uses as exhaust line, play the effect of the heat energy that reclaims burning and gas-exhausting, when using as the air-breathing road of auxiliary air, play the effect of preheating auxiliary air.
In present embodiment, to fuel nozzle 6 feed fluid fuel (for example heavy oil) be used for the spray air of spraying liquid fuel, but can not use spray air yet and the liquid fuel high pressure is sprayed.In addition, primary air supply road 7 comprises be used to the convolution wing 11 that makes primary air convolution around fuel nozzle 6.
In diffusion combustion burner 1, supply with according to the fuel quantity that sprays from fuel nozzle 6 by air blast 12 and realize the combustion air of the flow of most suitable air-fuel ratio, and distribute to primary air and supply with road 7 and regenerator 10.In the stream of supplying with primary air, be arranged side by side main supply air door (damper) 13 and increment and supplied with air door 14.In diffusion combustion burner 1, be designed to: if only open main supply air door 13,5% of combustion air total amount is imported primary air as primary air and supply with road 7, if open main supply air door 13 and increment are supplied with air door 14 simultaneously, 10% of combustion air total amount is imported primary air as primary air and supply with road 7.
In addition, diffusion combustion burner 1 has the Temperature Detector 15 of measuring the temperature in main chamber 2, and in burning was carried out, the detected temperatures of Temperature Detector 15 was supplied with air door 14 sealings with increment during for the setting value of regulation, for example more than 800 ℃.In other words, in diffusion combustion burner 1, with primary air with respect to the ratio of the total amount of primary air and auxiliary air, be set as highlyer by 10% when be primary air being the low temperature of 800 ℃ of less thaies than the temperature at main chamber 2, be to be set as 5% lower (primary air is than adjusting device) more than 800 ℃ the time in the temperature of main chamber 2.
Represent in Fig. 2 be diffusion combustion burner 1 primary air than with burning and gas-exhausting in NO
xRelation between concentration.As shown in the figure, primary air is than higher NO
xConcentration is higher, and this pass ties up to uses in the fluid combustion device as known to general.And, if comparing, primary air surpasses 40%, NO
xConcentration can sharply increase.In addition, the NO in general exhaust gas
xConcentration is limited by decree.For example, in the decree of Japan, for industrial furnace, be converted into oxygen concentration 11% value on be limited to 120～150ppm, therefore, as the product specification of industrial furnace, take about 100ppm as the upper limit comparatively suitable.Therefore, in diffusion combustion burner 1 of the present invention, the primary air ratio should be below 40%.In addition, if the primary air ratio is below 10%, can fully reduce the NO in exhaust gas
xConcentration is from NO
xConcentration is very safe.
Then, in table 1 expression be the result of the variation of the carbon attachment state on the inwall of primary zone 4 of the diffusion combustion burner 1 of confirming that at normal temperatures the difference due to the primary air ratio causes.In table, use when obviously being attached with carbon on the inwall of primary zone 4 * expression, represent with △ in the time of confirming slightly to have blackout, do not represent with zero when there is no stain fully.In addition, for this experiment, main supply air door 13 and increment are supplied with air door 14 and suitably are replaced with suitable capacity.
Table 1
| Primary air is than (%) | 3 | 5 | 7 | 10 | 15 | 20 |
| The carbon attachment state | × | △ | △ | ○ | ○ | ○ |
As top, in diffusion combustion burner 1, if the primary air ratio is more than 10% at normal temperatures, can not produce carbon, can obtain good fired state.In addition, even primary air is than less than 10%, also can obtain good burning according to the temperature in main chamber 2 and the temperature conditions of extraneous gas (combustion air), if the primary air ratio is more than 5%, confirm to prevent obviously to produce the imperfect combustion of black smoke etc.Therefore, in diffusion combustion burner 1, when normal temperature, if the primary air ratio is more than 5%, below 40%, still can not have problems on imperfect combustion on decree.
And, table 2 expression be the variation of the carbon attachment state that causes due to the difference of primary air ratio when being 800 ℃ of the temperature of main chamber 2.
Table 2
| Primary air is than (%) | 3 | 4 | 5 | 6 | 7 |
| The carbon attachment state | × | △ | ○ | ○ | ○ |
As top, in diffusion combustion burner 1, when the temperature of main chamber 2 is higher, even primary air also can not be found the generation of carbon than being reduced to 5%.
Consider above burning condition, in diffusion combustion burner 1, for energy reduce NO
xConcentration also obtains desirable burning, as previously explained, primary air than being made as 10% when the low temperature, is made as 5% when high temperature.By this, even diffusion combustion burner 1 uses the liquid burning, can not smolder yet and adhere on the furnace wall with carbon, can obtain good burning, can be with NO
xGeneration be controlled at bottom line.
This be because: 4 inside wrap into primary air and import to the flame of main chamber 2 interior formation is inner in the primary zone for a large amount of unburned fuels that produce and imperfect combustion thing (CO) thereof by with low temperature the time, can prevent its adhere to the form of carbon on the inner surface of the inner surface of furnace wall 3, especially primary zone 4 or become burning and gas-exhausting gas in cigarette.In order to bring the effect of above-mentioned gas curtain, in the present invention, particularly when low temperature, effectively the convolution wing 11 grades by present embodiment make the convolution ground supply around fuel nozzle 6 of primary combustion air.
In addition, reduce primary air than improving auxiliary air by heat storage 9 supplies with respect to the ratio of combustion air total amount.Therefore, reduce primary air ratio can also improve the thermal efficiency.For example, if the primary air ratio is below 40%, diffusion combustion burner 1 will have superiority than burner that comprises recuperator (recuperator) (burner) etc., can obtain the high thermal efficiency as the heat storage type combustion apparatus.
In addition, in diffusion combustion burner 1, also can with fuel nozzle 6 or its front tube be changed to the device that is suitable for the gaseous fuels such as LNG first watch, in order to can use gaseous fuel.
In addition, in above-mentioned embodiment, whether be more than 800 ℃, the primary air ratio to be set as 5% and 10% according to the temperature of main chamber 2, but also can use the air door that to regulate aperture, promote at leisure the primary air ratio along with the temperature of main chamber 2 rises.
In addition, in above-mentioned embodiment, adjust primary air than the time the threshold value of temperature of main chamber 2 be 800 ℃, but the said temperature setting value also can be the temperature of the liquid fuel spontaneous combustion that usually is ejected.
And in above-mentioned embodiment, primary air is set as 10% than when low temperature, is set as 5% during high temperature, but this is an example, and in other embodiments, according to its burner, optimal primary air is more different than possibility.Therefore, the primary air of the primary air when the invention is intended to high temperature when being made as than low temperature is than low value, and its value also can be different from the embodiment described above.
Claims (5)
1. diffusion combustion burner is characterized in that having:
The primary zone, this primary zone is to the main chamber opening;
Pilot burner, this pilot burner is located at described primary zone;
Fuel nozzle, this fuel nozzle is to described primary zone injecting LPG in liquefied condition with for the spray air of spraying described liquid fuel;
Primary air is supplied with the road, and this primary air is supplied with the road and supply with primary air along described fuel nozzle around described fuel nozzle;
Auxiliary air is supplied with the road, and this auxiliary air is supplied with the road and sprayed auxiliary air near the of described primary zone in described main chamber;
Air-flow revolving gear, this air-flow revolving gear make the convolution around described fuel nozzle of described primary air, will wrap into from the described liquid fuel that described fuel nozzle sprays to become gas curtain; And
Primary air compares adjusting device, this primary air than adjusting device with described primary air with respect to the ratio of the total amount of described primary air and described auxiliary air, be primary air than heightening when the temperature of described main chamber is lower than the autoignition temperature of described liquid fuel, and turn down when the temperature of described main chamber is higher than the autoignition temperature of described liquid fuel.
2. diffusion combustion burner as claimed in claim 1, is characterized in that, the described primary air ratio the when temperature of described main chamber is hanged down than the autoignition temperature of described liquid fuel is more than 5%, below 40%.
3. diffusion combustion burner as claimed in claim 2, is characterized in that, the described primary air ratio the when temperature of described main chamber is hanged down than the autoignition temperature of described liquid fuel is more than 10%.
4. diffusion combustion burner as claimed in claim 1 or 2, is characterized in that, the described primary air ratio the when temperature of described main chamber is higher than the autoignition temperature of described liquid fuel is below 10%.
5. diffusion combustion burner as claimed in claim 1 or 2, it is characterized in that, the stream of using for the exhaust that alternately is also used as burning gases and be provided with a plurality of described auxiliary airs and supply with the road, and supply with the road by heat storage to described auxiliary air respectively and import described auxiliary air.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-302581 | 2008-11-27 | ||
| JP2008302581A JP4750174B2 (en) | 2008-11-27 | 2008-11-27 | Diffusion combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101749701A CN101749701A (en) | 2010-06-23 |
| CN101749701B true CN101749701B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102249817A Active CN101749701B (en) | 2008-11-27 | 2009-11-23 | Diffusion combustion burner |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4750174B2 (en) |
| KR (1) | KR101154558B1 (en) |
| CN (1) | CN101749701B (en) |
| TW (1) | TWI384184B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5752156B2 (en) * | 2013-01-29 | 2015-07-22 | 中外炉工業株式会社 | Combustion control method for combustion apparatus |
| JP6448679B2 (en) * | 2017-02-20 | 2019-01-09 | 中外炉工業株式会社 | Regenerative burner equipment |
| JP6384881B2 (en) * | 2017-02-20 | 2018-09-05 | 中外炉工業株式会社 | Regenerative burner equipment |
| JP7410642B2 (en) | 2018-12-06 | 2024-01-10 | 株式会社セイブ・ザ・プラネット | special burner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000039143A (en) * | 1998-07-24 | 2000-02-08 | Nkk Corp | Combustion control method of heat storage type burner device and burner device therefor |
| JP2005055036A (en) * | 2003-08-01 | 2005-03-03 | Sumikin Manegement Co Ltd | Heat storage type burner |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2214625B (en) * | 1987-12-24 | 1992-01-02 | British Steel Plc | Regenerative burner system |
| JPH0826970B2 (en) * | 1993-08-18 | 1996-03-21 | 中外炉工業株式会社 | Two-stage combustion burner |
| JP3182046B2 (en) * | 1994-07-27 | 2001-07-03 | 中外炉工業株式会社 | Method and apparatus for operating regenerative heat storage combustion system |
| JP3539657B2 (en) * | 1996-10-25 | 2004-07-07 | 日本ファーネス工業株式会社 | Thermal storage burner device |
| US20020072020A1 (en) * | 2000-10-16 | 2002-06-13 | Crane John J. | Regnerative burner |
| US6616442B2 (en) * | 2000-11-30 | 2003-09-09 | John Zink Company, Llc | Low NOx premix burner apparatus and methods |
| BRPI0517977B1 (en) * | 2004-11-04 | 2019-05-21 | Novelis Inc. | REGENERATIVE BURNER FOR A OVEN, MEDIUM BURNER FOR A REGENERATIVE BURNER, METHOD OF DECONTAINING A MEDIUM OF A REGENERATIVE CHIEMATOR FOR A MEDIUM AND BURNER FOR A REGULATORY BURNER |
| TWI299077B (en) * | 2005-11-22 | 2008-07-21 | Clean Comb Technologies Llc | Combustion method and system |
-
2008
- 2008-11-27 JP JP2008302581A patent/JP4750174B2/en active Active
-
2009
- 2009-09-07 TW TW098130063A patent/TWI384184B/en active
- 2009-10-08 KR KR1020090095535A patent/KR101154558B1/en active IP Right Grant
- 2009-11-23 CN CN2009102249817A patent/CN101749701B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000039143A (en) * | 1998-07-24 | 2000-02-08 | Nkk Corp | Combustion control method of heat storage type burner device and burner device therefor |
| JP2005055036A (en) * | 2003-08-01 | 2005-03-03 | Sumikin Manegement Co Ltd | Heat storage type burner |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI384184B (en) | 2013-02-01 |
| JP4750174B2 (en) | 2011-08-17 |
| KR20100061322A (en) | 2010-06-07 |
| JP2010127525A (en) | 2010-06-10 |
| TW201020475A (en) | 2010-06-01 |
| KR101154558B1 (en) | 2012-06-11 |
| CN101749701A (en) | 2010-06-23 |
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