KR101556586B1 - Complex burner for Low nitrogen oxid - Google Patents

Complex burner for Low nitrogen oxid Download PDF

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Publication number
KR101556586B1
KR101556586B1 KR1020150113077A KR20150113077A KR101556586B1 KR 101556586 B1 KR101556586 B1 KR 101556586B1 KR 1020150113077 A KR1020150113077 A KR 1020150113077A KR 20150113077 A KR20150113077 A KR 20150113077A KR 101556586 B1 KR101556586 B1 KR 101556586B1
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South Korea
Prior art keywords
tube
air
fuel
burner
knock
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KR1020150113077A
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Korean (ko)
Inventor
이종태
박재언
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주식회사 수국
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Publication of KR101556586B1 publication Critical patent/KR101556586B1/en

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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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • 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
    • F23D14/48—Nozzles
    • 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
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14241—Post-mixing with swirling means

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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 reduces the amount of knocks produced by the third-generation IFGR technology or the first-generation air-staging technology compared to the low-knock burner, and as a single technology, And a knockdown of the burner is generated. To this end, the present invention is directed to a system for guiding air to a combustion chamber, wherein a diffuser is disposed at an inward end of the combustion chamber, a fuel supply tube is disposed inside the tube and the tube is connected to the diffuser, Wherein the air gap extends from the inner tube edge and discharges at least a portion of the air flowing inside the tube toward the outer periphery of the tube and the air gap is formed between the tube and the tube guide The amount of the discharged air can be increased or decreased according to the length of the gap.

Description

Complex burner for low nitrogen oxidizer < RTI ID = 0.0 >

The present invention relates to a low knock burner, and more particularly, to a composite low knock burner that reduces the amount of NOx generated by implementing an air multi-stage combustion method and an IFGR (Internal Flue Gas Recirculation) .

In general, nitrogen oxides (NOx) are fuel NOx produced by oxidation of a nitrogen component chemically bonded to a fuel in a combustion process, thermal NOx generated in the combustion air by being released at a high temperature Thermal NOx), and Prompt NOx, which is rapidly produced when hydrocarbon fossil fuels are exposed to high temperatures at high temperatures.

Noxious oxides (NOx) have been badly affected in the atmosphere and human life, so long ago, the Knox burner technology has been developed. This is divided into the following generations.

- Below -

First Generation: The first-generation low-NOX technology is a typical air staging technology that provides a step-by-step supply of air to the furnace to prevent rapid oxidation by the fuel in the furnace, thereby lowering the flame temperature. Reduce thermal knots.

Second Generation: The second-generation low-NOx technology is a gas staging technology, which is divided into a central portion (about 5% to 25%) and an outer portion (75% to 95%), , And the outer frame portion is constituted by an air shortage state, thereby suppressing the oxidation reaction of the outer frame portion occupying the majority of the flame and preventing the flame temperature from becoming high, thereby reducing the occurrence of thermal knocks. Although there is a possibility that the prompt knock occurs due to the air shortage state of the outer flame, the flame repellent function and the prompt knock generation suppression function can be implemented at the same time by ejecting the flame to the periphery so that the flame temperature becomes 1000 or less.

Third Generation: The third-generation Lowox technology is based on IFGR (Internal Flue Gas Recirculation), which allows the combustion gas to be recirculated in the combustion chamber to be recirculated in the combustion chamber, so that the combustion gas is mixed with the flame, To reduce the thermal knock.

As such a third-generation low-knox technology, the present applicant has proposed a high-efficiency low-knock type combustion head of Patent No. 10-1466809 and a burner using the same. Patent No. 10-1466809 has caused a vortex in the combustion head to improve the mixing characteristics of the fuel and the air to burn the fuel and allow the combustion gas to self-recirculate, thereby greatly reducing the occurrence of the knock. However, the applicant of the present invention has not been satisfied with this, but has felt the necessity of developing a low-knock type burner that further reduces the amount of knocks generated, and suggests a composite low-knox burner that further reduces the amount of knocks generated by combining low- I want to.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hybrid low-burner burner that combines air staging technology with IFGR technology and applies a thermal knock control technique through air distribution to a magnetic recycle type IFGR to reduce the amount of knock generated.

According to the present invention, the above-mentioned object is accomplished by providing a fuel cell system including a diffuser, a diffuser disposed at an inner end of the combustion chamber, a fuel supply pipe disposed inside the diffuser and connected to the diffuser, Wherein the air gap extends from the inner tube edge and discharges at least a portion of the air flowing inside the tube toward the outer periphery of the tube, the air gap being between the tube and the tube guide And the amount of air discharged in accordance with the length of the gap formed in the low-viscosity burner is increased or decreased.

According to the present invention, it is possible to further reduce the amount of knock generation compared to an existing low-knock burner in which the existing IFGR technology is applied by blending the air staging technology with the burner according to the IFGR technology.

FIG. 1A is a conceptual view of a tube structure of a composite low knock burner according to an embodiment of the present invention.
1B shows a reference diagram for a method of controlling air gap in a composite low-knock burner according to an embodiment.
Figure 2 shows a photograph of an image of a product of a composite low knock burner according to an embodiment of the present invention.
3 is a cross-sectional view conceptually illustrating a connection relationship between the tube and the tube guide.
Fig. 4 is a partial cutaway perspective view showing the configuration of the tube of the burner, the combustion head, the fuel supply pipe, and the like shown in Fig. 1A.
FIG. 5 shows a reference diagram for a process of performing magnetic recirculation combustion in a combustion chamber by a burner having a tube according to an embodiment.
6 shows a test operation result of the composite low-knock burner according to the embodiment.
Fig. 7 shows a reference drawing for explaining a process of forming a vortex due to a step between the fuel nozzle and the edge of the combustion head.
8 is a cross-sectional structural view of a composite low-knucking burner for explaining a structure for adjusting the length of an air gap.
Fig. 9 shows a photograph of a seal for a position regulator for operating the air gap regulating tube shown in Fig.

The tube referred to in the present specification can form a flame by supplying fuel and air into the combustion chamber in the shape of an empty pipe inside. A diffuser may be positioned at the end of the tube inserted into the combustion chamber and the diffuser may be configured to properly mix and combust the fuel and air to determine the shape of the flame to be burned or to increase the combustion efficiency or reduce the amount of knock Can be installed for the purpose.

Further, a fuel supply pipe for supplying fuel into the combustion chamber may be built in the inside of the tube. That is, the fuel tube is disposed at the center of the tube and the air flows at the outer periphery of the tube, so that the tube can have a double tube structure.

A tube is inserted into one side of the combustion chamber referred to in this specification to receive fuel and air, and an exhaust pipe is formed on the other side of the combustion chamber to discharge the combustion gas. However, the exhaust pipe and its surrounding structure do not correspond to the essential core of the present invention, and therefore, they are not shown or described in the drawings.

The tubes and burners referred to herein may be represented by conceptual cross-sectional views, with the illustration or description of the additional components omitted . However, this is omitted for the convenience of explanation and understanding of the present invention, and the structure and connection relation of the tube and the burner according to the embodiment should not be limited by the drawings and the description.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1A is a conceptual diagram of a tube structure of a composite low-knox burner according to an embodiment of the present invention, and FIG. 1B is a reference diagram of a method of controlling a gap gap in a composite low- Respectively,

FIG. 2 is a photograph showing an image of a product of a composite low-knox burner according to an embodiment of the present invention, FIG. 3 is a cross-sectional view conceptually illustrating a connection relationship between a tube and a tube guide, FIG. 5 is a partially cutaway perspective view showing a configuration of a tube of a burner, a combustion head, a fuel supply pipe, and the like shown in FIG. 1A, FIG. 5 is a view showing a process of performing magnetic recirculation combustion in a combustion chamber by a burner having a tube according to an embodiment Fig.

The low knock burner according to the embodiment is provided with a tube 3 for guiding air into the combustion chamber F and a heat exchanger disposed at an inner diameter of an end portion of the tube 3, A burning head 5 of disc type which maintains a distance d1 between the inner diameter of the tube 3 and the end of the tube 3, a fuel supply pipe (not shown) disposed at the inner center of the tube 3 for supplying fuel to the combustion head 5 8) and a fuel injection pipe 8a having a fuel nozzle 4a radially disposed at the end of the fuel supply pipe 8 for injecting fuel in a direction perpendicular to the air supplied through the air supply passage 7 .

At the end of the tube (3), a side wall portion (3a) having a section inclined at a predetermined angle (a) is formed. The side portion 3a can be formed to be bent with a gentle slope toward the protruding portion 8b protruding from the combustion head 5. [ This allows the passage of air toward the combustion head 5 in the air supply passage 7 to be narrowed to increase the air flow rate.

A tube guide 10 is formed in an outer circumferential region of the tube 3 to guide a part of the air flowing inside the tube 3 to the outer periphery of the tube 3

The tube guide 10 forms an air gap 11 with the tube 3 and the tube guide 10 moves backward in the DF direction or in the DB direction or the tube 3 advances in the DF direction , It is possible to increase or decrease the size of the air gap 11 by moving backward in the DB direction.

Increasing the size of the air gap 11 increases the amount of air discharged into the combustion chamber F through the air gap 11. Conversely, if the length of the air gap 11 is reduced, The amount of air discharged into the combustion chamber F can be reduced. The length d01 of the air gap 11 shown in Fig. 1A illustrates that the length d01 of the gap 3 is increased or decreased by moving the tube 3 or the tube guide 10 in the DB or DF direction, The amount of air that is varied through the adjustment of the length d01 of the tube 11 can be determined according to the amount of fuel discharged from the tube 3 into the combustion chamber F and the amount of air.

The tube guide 10 may be disposed adjacent to the tube 3 and an air gap 11 may be formed between the tube guide 10 and the tube 3 to increase or decrease the length d01.

3, the outer periphery of the tube guide 10 is the same as or similar to the outer periphery of the tube 3, and the outer periphery of the tube guide 10 is the same as or similar to the outer periphery of the tube 3, The tube 3 forms an inclined face 11a toward the inner periphery of the tube guide 10 to form an air flow path between the inside of the tube 3 and the air gap 11. [

A part of the air flowing in the tube 3 flows into the combustion head 5 through the tube 3 because the air for combustion of the fuel flows inside the tube 3 and the tube guide 10 is connected to the inside of the tube 3. [ The air discharged through the air gap 11 can be gradually diffused at the outer periphery of the tube 3 while flowing along the outer periphery of the tube 3. [

The tube 3 supplies the combustion air through the combustion head 5 and part of the air flowing inside the tube 3 flows into the outer periphery of the tube 3 through the air gap 11 Air can be supplied. The air discharged into the combustion chamber F through the air gap 11 corresponds to the first generation air staging technology and makes an excess fuel in the central portion of the flame generated around the combustion head 5, You can create a state.

The central portion of the flame which is in an excess fuel state may correspond to the air ratio of 0.6 or thereabout, and the peripheral portion of the flame which is excess air may be in the range of 1.2 to 1.8. Due to such a difference in air ratio, the center portion S2 of the flame in an excess fuel state limits the rapid oxidation reaction of the fuel, so that the thermal knock can be reduced and the combustion gas can cause magnetic recirculation in the combustion chamber F. [ The flame discharged from the combustion head 5 is guided to the center portion S2 by the air directed toward the center portion S2 by the side portion 3a of the tube 3 and then diffused to form a flame of a long shape.

As the shape of the flame has the shape of a long body, the flame may increase in velocity as the pressure in region S1 decreases. According to Bernoulli's theorem, the combustion gas S3 can be guided to the region S1 having the long-form shape to achieve magnetic recirculation toward the combustion head 5. [

At this time, the combustion gas S3 introduced into the region S1 may collide with the air discharged from the tube guide 10 at an angle of 90 degrees or the like in the region S4. The combustion gas S3 is rapidly mixed with the air discharged from the tube guide 10 in the region S4,

1) the temperature is lowered,

2) the air concentration increases,

3) Unburned fuel and air can be rapidly mixed at the center S2.

Thus, the combustion gas S3 having a lower temperature than the central portion S2 is rapidly mixed with the air having a relatively low temperature in the region S4 (the air discharged from the tube guide 10), and the temperature is further lowered, The air for burning the fuel remaining in the combustion gas S3 is supplied and can be burned again by the flame discharged from the combustion head 5. [ At this time, since the self-recirculating combustion gas S3 is sufficiently in contact with the wall surface of the combustion chamber F, the temperature may be lowered by radiative heat with the combustion chamber F. As described above, the air discharged from the air gap 11 corresponding to the space between the tube guide 10 and the tube 3 realizes the effects of the above-described 1) to 3) 3), the structure is simple and high reliability can be ensured.

In the overlapping area A1 where the tube 3 and the tube guide 10 are overlapped to form the air gap 11 between the tube guide 10 and the tube 3, The tube 3 may have a taping structure in which the end of the tube 3 is reduced so that it can be inserted into the inner periphery of the tube guide 10. In Figure 1 the tube 3 overlaps the tube 3 and the tube guide 10 The diameter of the overlapping area A1 becomes smaller than that of the area A2.

The air gap 11 is a space between the outer periphery of the tube 3 and the tube guide 10 so that air can be discharged from the entire outer periphery of the tube 3 toward the combustion head 5. [ 1 illustrates that air roots A01, A02 and A03 are formed through the air gap 11, and that the air roots are not locally discharged by the projecting air spouts or holes, Air can be uniformly discharged from the entire periphery. Air is discharged to the front of the combustion head 5 by a uniform gap (air gap 11) formed between the tube 3 and the tube guide 10 so that the air to be discharged is discharged through a hole or an air- And is capable of providing uniform combustion characteristics.

On the other hand, since the central portion S2 in Fig. 5 is in an excess fuel state, when the temperature is high, a prompt knocking may occur. The temperature of the center S2 is,

- the temperature is lowered by the mixing of the air + combustion gas (S3) discharged from the tube guide (10)

The temperature of the combustion gas is lowered by the air newly introduced through the air gap 11,

- Since the fuel contained in the combustion gas is re-burned by the air newly introduced through the air gap 11,

The temperature of the central portion S2 may be in an excess fuel state and the prompt knock can be suppressed. The prompt knock occurs mainly when the fuel is excessively high and the temperature is high. However, the composite low knock burner 1 having the tube 3 and the tube according to the embodiment controls the temperature of the center S2 and the supply of fresh air Thereby suppressing the prompt knock. In addition, it is possible to suppress the thermal knock at the same time by preventing the central portion S2 from rising. What is required for this is merely to add the tube guide 10 to the outer circumferential region of the tube 3 and to allow the air of the tube 3 to be introduced through the tube guide 10 to greatly reduce the knock .

As a result of testing the composite type low knock burner implemented by the present applicant in the actual combustion chamber F, the amount of knocks is smaller than that of the existing third generation IFGR technology or the first generation air staging technique Knox was found to occur. This will be described with reference to FIG.

6 shows a test operation result of the composite low-knock burner according to the embodiment. Referring to FIG. 6, it can be seen that the thermal knock is further reduced in the composite low-knucking burner according to the embodiment as compared with the conventional third generation low-knock technology IFGR technology.

The IFGR technique may be the technique of Patent No. 10-1466809 mentioned in the "Technique as a Background of the Invention ", and the third generation low-burner burner uses only the magnetic recirculation of the combustion gas to lower the temperature of the center S2 of the flame On the other hand, the hybrid low-burner burner 1 according to the embodiment can supply fresh air to the central portion S2 of the flame and rapidly mix with the combustion gas at this time, thereby further lowering the temperature of the central portion S2. Accordingly, as shown in FIG. 6, the composite low-low burner 1 according to the embodiment significantly reduces the amount of generated heat knocks, thereby realizing a more environmentally friendly low-knead burner.

On the other hand, in the case of the low-knock burner according to the first-generation air-staging technology, the knock generation amount is higher than the low knock burner according to the IFGR technology. Accordingly, even when the average value is calculated for the sum of the amount of the knock generated by the first-generation air staging technique and the amount of the knock generated by the third-generation IFGR technology, the knock generated by the composite low- , Which means that the knock generation is lower than the simple combination of the existing 3rd generation IFGR technology and the first generation air staging technology.

Since the center portion S2 of the flame is in an excess fuel state but the air is newly supplied to the center portion S2 of the flame by the air gap 11, And it is possible to suppress the occurrence of the prompt knock in the central portion S2.

That is, the hybrid low-burner burner 1 according to the embodiment is characterized by realizing a low-knock burner that is environmentally friendly by significantly reducing the amount of generated thermal knocks compared to the existing third-generation low-knox technology while suppressing the prompt knock.

On the other hand, air is supplied to the combustion head 5 through the side wall portion 3a formed between the outer periphery of the combustion head 5 and the side wall portion 3a. At this time, the fuel is injected through the fuel injection pipe 8a The flame can be formed by spraying. At this time, since the side surface portion 3a forms the side portion 3a at the predetermined angle a, the air injected to the fuel injection tube 8a of the combustion head 5 is mixed with the fuel discharged from the fuel injection tube 8a May be intersected at an angle of 90 degrees or so. Accordingly, the fuel injected from the fuel injection pipe 8a is rapidly mixed with air and discharged, and the air discharged by the side portion 3a is directed toward the center S2. Therefore, the fuel and air are gathered toward the central portion S2 and burned to form a flame of a long shape, and the region S1 shown in FIG. 5 can correspond to the shape of the long bead.

The combustion head 5 has a disk shape and a central portion is formed by a diffusing frame 5a in which a protruding portion 8b is formed, a defining frame 5a at a side line portion of the protruding portion 8b, And an air hole 5b formed in the diffusing frame 5a for injecting the air supplied through the air supply passage 7 into the combustion chamber F .

The air hole (5b)

- supply air to the center of the flame,

- When the diameter of the combustion head (5) increases in accordance with the increase of the burner capacity, it may be provided to form a secondary flame for improving the resistivity of the flame formed in the combustion head (5).

As the air holes 5b and the fuel nozzles 4a are arranged at a certain angle, the amount and pressure of the air discharged from the air holes 5b can be uniform with respect to the front end of the diffusing frame 5a, When mixed with the fuel injected from the fuel nozzle 4a, it can be expected that the mixing ratio of the fuel and air is also uniform.

The fuel injected from the fuel nozzle 4a intersects the air discharged through the air supply passage 7 at an angle close to almost 90 degrees. The fuel is injected and rapidly mixed with the air supplied through the air supply passage 7 to form a flame and the air is guided to the central portion S2 by air introduced into the central portion S2 through the side portion 3a Can form concentrated flames. At this time, the flame is concentrated at the central portion S2 and then dispersed to form a long-shaped region S1. As the width of the region S1 is narrow and the pressure is lowered, S1) so that the combustion gas S3 is self-recirculated.

A gap (not shown) is formed between the end of the fuel discharge pipe 8a and the rim of the diffusing frame 5a so that the fuel injected from the fuel injection pipe 8a is rapidly mixed with the air supplied through the air supply passage 7. [ gap may be formed. The length of the gap may be set to 0.1% to 50% of the diameter RS of the fuel nozzle 4a. Or the gap may be such that the end of the fuel nozzle 4a and the edge of the diffusing frame 5a are 1 mm to 2 mm. However, it is not limited.

The air discharged through the air supply passage 7 can cause a vortex at the end of the diffusing frame 5a if the end of the fuel injection pipe 8a is formed smaller than the diffusing frame 5a, And the fuel can be mixed more rapidly. This will be described with reference to FIG.

Fig. 7 shows a reference drawing for the vortex formation process by the step between the fuel nozzle and the edge of the combustion head.

7 (a) shows the case where the length of the fuel discharge pipe 8a is equal to the edge of the diffusing frame 5a, and Fig. 7 (b) 5a.

7A, since the air discharged from the air supply passage 7 to the combustion chamber F has a linearity, no vortex is formed at the end of the fuel discharge pipe 8a, and a direct current flows therethrough. 7 (b), the rim of the diffusing frame 5a and the fuel discharge pipe 8a form a step d0, and the air directed from the air supply passage 7 to the combustion chamber F has a step It is possible to form a vortex while diffusing into the generated region. Thus, the fuel injected from the fuel injection pipe 8a can be rapidly mixed with the air supplied through the air supply passage 7.

According to the above process, the fuel and the air are rapidly mixed and burned to form a flame in the shape of an elongated object, and the combustion gas S3 is guided into the region S1 having the shape of a long bead. The air is rapidly mixed with the combustion gas S3, while the temperature of the combustion gas is lowered, and at the same time, supplied to the fuel-rich region S2 to control the thermal knock and the prompt knock.

8 is a cross-sectional structural view of a composite low-knucking burner for explaining a regulation structure of the length of an air gap.

Referring to FIG. 8, in the composite low knock burner according to the embodiment, the tube guide 10 and the tube 3 are separated from each other, and the tube guide 10 is connected to the air gap control tube 14 and the screw 15 As shown in Fig. The air gap adjusting pipe 14 is extended out of the body of the composite low knock burner 1 and can move in the DF direction or the DB direction. When the air gap adjusting tube 14 moves in the DB direction, the tube guide 10 threadedly engaged with the air gap adjusting tube 14 moves in the same direction and the air gap formed between the tube guide 10 and the tube 3 The length d01 of the gap 11 increases and the length of the air gap 11 formed between the tube guide 10 and the tube 3 increases when the air gap adjusting tube 14 moves in the DF direction. the amount of air directed to the combustion head 5 through the air gap 11 decreases while the amount of air d01 decreases. The air gap regulating pipe 14 extending out of the body of the composite low knock burner 1 is connected to a position regulator 16 formed at the outer circumferential edge of the body of the composite low knock burner 1 as shown in FIG. It is possible to move in the DB direction or the DF direction.

1: Combination low knox burner 3: Tube
3a: side portion 5: diffuser
5a: Defining frame 5b: Air hole
10: tube guide 11: air gap

Claims (5)

A tube for guiding air to the combustion chamber, a diffuser disposed at an end of the combustion chamber in an inward direction thereof, and a fuel supply pipe disposed therein, the tube being connected to the diffuser; And
And a tube guide disposed adjacent to the tube and defining an air gap between the tube and the tube,
Wherein the air gap extends from the inner tube and discharges at least a portion of the air flowing inside the tube toward the outer periphery of the tube,
Wherein an amount of air discharged in accordance with a length of a gap formed between the tube and the tube guide increases or decreases. The method according to claim 1,
The tube may comprise:
And a tube side portion that is inclined such that the end portion faces the longitudinal center line of the tube. The method according to claim 1,
The tube may comprise:
One region being formed in a tapered configuration to form an overlapping region to be inserted into the tube guide,
And forming an air gap which is a gap between the tube guide and the tube in the overlap region. delete The method of claim 3,
The tube may comprise:
And the diameter of the overlap region is reduced to a diameter of the end portion.
KR1020150113077A 2015-08-11 2015-08-11 Complex burner for Low nitrogen oxid KR101556586B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107477579A (en) * 2016-06-08 2017-12-15 株式会社水国 Low nitrogen oxide burner
WO2018155735A1 (en) * 2017-02-23 2018-08-30 주식회사 수국 Composite low-nox burner
CN109737409A (en) * 2018-12-28 2019-05-10 西安交通大学 A kind of low NOx gas burner using semicircle backing wind

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101466809B1 (en) * 2014-09-23 2014-11-28 주식회사 수국 Burner head for Low nitrogen oxide and high efficiency and burner using the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101466809B1 (en) * 2014-09-23 2014-11-28 주식회사 수국 Burner head for Low nitrogen oxide and high efficiency and burner using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107477579A (en) * 2016-06-08 2017-12-15 株式会社水国 Low nitrogen oxide burner
CN107477579B (en) * 2016-06-08 2020-11-20 株式会社水国 Low nitrogen oxide burner
WO2018155735A1 (en) * 2017-02-23 2018-08-30 주식회사 수국 Composite low-nox burner
CN109737409A (en) * 2018-12-28 2019-05-10 西安交通大学 A kind of low NOx gas burner using semicircle backing wind

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