CN216976788U

CN216976788U - Natural gas low-nitrogen combustion burner block

Info

Publication number: CN216976788U
Application number: CN202220450588.0U
Authority: CN
Inventors: 华奇平; 王文虎; 方辉
Original assignee: Wuxi Cunchang South Engineering Technology Co ltd
Current assignee: Wuxi Cunchang South Engineering Technology Co ltd
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-07-15
Anticipated expiration: 2032-03-03

Abstract

The utility model provides a natural gas low-nitrogen combustion burner block, which is of a transversely-arranged hollow barrel-shaped structure, and comprises four sections of structures, wherein the four sections of structures are sequentially arranged in the flowing direction of flue gas: the device comprises a transition sealing section, a mixing section, a first expansion section and a second expansion section; the mixing section, the first expanding section and the second expanding section are smoothly connected and are sequentially abutted; the divergence angle in the first divergence section is a first divergence angle, the length of the first divergence section in the horizontal direction is a first longitude length, the divergence angle in the second divergence section is a second divergence angle, the length of the second divergence section in the horizontal direction is a second longitude length, and the first divergence angle is at least 2.5 times of the second divergence angle; first long be the second through long 1/2 ~ 3/4, can realize the first expansion section of the flue gas entrainment furnace flue gas backward flow of second expansion section, reduce burning temperature in the burner block, can realize the purpose that the suppression nitrogen oxide generated, for the cooling of burner block simultaneously, the temperature lasts too high in avoiding the burner block, extension burner block life.

Description

Natural gas low-nitrogen combustion burner block

Technical Field

The utility model relates to the field of thermal combustion, in particular to a natural gas low-nitrogen combustion burner block.

Background

The nozzle of configuration has various different forms on the heating furnace, can realize different combustion effects, for the convenience of heating furnace construction and nozzle installation, also for the convenience of later stage maintenance and change, all can dispose the burner block before the nozzle spout, and the burner block is according to the different of nozzle type and to some extent distinguish.

The burner block is arranged on the heating furnace, and can play the following roles: 1. heating the fuel in the burner block to the ignition temperature, so that the fuel is easy to ignite and quickly burnt; 2. a certain high temperature is kept in the burner block, so that the combustion process is stable, and the phenomenon of pulsation or combustion interruption is avoided; 3. the shape of the flame is organized to meet the requirements of the heating process; 4. further mixing the fuel and air.

But present conventional burner block design, when the flue gas is in burner block export section, the flue gas is direct to be scattered from the export, and burner block inner chamber high temperature easily generates nitrogen oxide, because burner block inner chamber temperature lasts high temperature simultaneously, and burner block life is generally shorter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a natural gas low-nitrogen combustion burner block.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a natural gas low-nitrogen combustion burner block, burner block are horizontal hollow tubbiness structure, burner block includes the four-section structure, and the direction according to the flue gas outflow is in proper order: the device comprises a transition sealing section, a mixing section, a first expansion section and a second expansion section; the mixing section, the first expanding section and the second expanding section are smoothly connected and are abutted in sequence; the expansion angle in the first expansion section is a first expansion angle, the length of the first expansion section in the horizontal direction is a first longitude length, the expansion angle in the second expansion section is a second expansion angle, the length of the second expansion section in the horizontal direction is a second longitude length, and the first expansion angle is at least 2.5 times of the second expansion angle; first through long 1/2 ~ 3/4 for the second through long, such structural design can realize that the flue gas entrainment furnace flue gas of second expansion section flows back first expansion section, reduces burning temperature in the burner block, can realize the purpose that the suppression nitrogen oxide generated, and for the cooling of burner block, the temperature lasts too high in avoiding the burner block simultaneously, extension burner block life.

Preferably, the larger the first divergence angle is designed along with the increase of the burner power, and the smaller the ratio of the first length to the second length is, the more the size ratio of the burner block is properly adjusted along with the burner power, so as to achieve the optimal entrainment effect.

Preferably, the transition sealing section is connected with the burner, and the gap is filled with high-alumina fiber cotton between the transition sealing section and the burner, so that the natural gas low-nitrogen burner is tightly connected with the burner block after being installed.

Preferably, the mixing section is a horizontal pipe section without an divergence angle inside, the horizontal length of the mixing section is less than the first vertical length, and an excessively long mixing section does not contribute to the suppression of nitrogen oxide generation, so that the mixing section is as short as possible.

Preferably, when the burner block is installed, the axis of the burner block is coaxial with the axis of the burner, so that uniform entrainment of flue gas is ensured, air flow is smooth, and the phenomenon of pulsation or combustion interruption is avoided.

Preferably, the burner block is formed by splicing two halves which are uniformly split from the axis, and is bonded into a whole by using an adhesive, so that the splicing design is used for replacing integral casting in consideration of convenience in manufacturing and transportation.

Compared with the prior art, the utility model has the beneficial effects that: such structural design can realize that the flue gas entrainment furnace flue gas of second expansion section flows back first expansion section, reduces the burning temperature in the burner block, can realize the purpose that the suppression nitrogen oxide generated, and for the cooling of burner block, the temperature in avoiding burner block lasts too high simultaneously, extension burner block life.

Drawings

FIG. 1 is a view of example 1 of the present invention;

FIG. 2 is a view showing the results of example 1 of the present invention;

description of reference numerals: 1. the burner comprises a burner body, 2 burner bricks, 21 a transition sealing section, 22 a mixing section, 23 a first expansion section, 24 a second expansion section, 25 a first expansion angle, 26 a first warp length, 27 a second expansion angle, 28 a second warp length and 3 high-alumina fiber cotton.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Embodiment 1, as in fig. 1-2, a natural gas low-nitrogen combustion burner block 2, burner block 2 is horizontal hollow tubbiness structure, and burner block 2 includes four sections of structures, does according to the direction that the flue gas flows out in proper order: a transition sealing section 21, a mixing section 22, a first expanding section 23 and a second expanding section 24; the mixing section 22, the first expanding section 23 and the second expanding section 24 are smoothly connected and are sequentially abutted; the internal divergence angle of the first divergent section 23 is a first divergence angle 25, the horizontal direction length of the first divergent section 23 is a first warp length 26, the internal divergence angle of the second divergent section 24 is a second divergence angle 27, the horizontal direction length of the second divergent section 24 is a second warp length 28, and the first divergence angle 25 is at least 2.5 times of the second divergence angle 27; the first warp length 26 is 1/2-3/4 of the second warp length 28.

The first divergence angle 25 is designed to be larger as the power of the burner 1 increases and the ratio of the lengths of the first and second extended

lengths

26 and 28 is smaller.

The transition sealing section 21 is connected with the burner 1, and the gap between the transition sealing section 21 and the burner 1 is filled with high-alumina fiber cotton 3.

The mixing section 22 is a horizontal pipe section with no divergence angle inside, and the horizontal length of the mixing section 22 is less than the first pass length 26.

When the burner block 2 is installed, the axis is coaxial with the axis of the burner 1.

The burner block 2 is formed by splicing two halves which are uniformly split from the axis and bonded into a whole by using an adhesive.

The burner block 2 is made of high alumina castable and other small amount of special materials, wherein Al is contained in the materials₂O3 is more than 65 percent, and the density is 2.5-2.7 cm³The compressive strength is more than 56Mpa, the power exceeds 1500kW, and the burner 1 is matched with the burner block 2, considering thatThe manufacturing and the transportation are convenient, the two parts are divided into two symmetrical parts, the two parts are integrally installed, when the burner is installed, high-temperature cement is selected for bonding, high-aluminum fibers are wrapped outside the burner block, then the lining of the heating furnace is built, and if the lining is poured, a plastic film is required to be wound after the fibers are wrapped outside the burner block 2, so that the fibers are not damaged when the burner block is poured.

The burner 1 should be coaxial with the burner block 2 as much as possible during installation, and the burner 1 should be fixed on an external steel structure (not shown in the figure), and is guaranteed to be tightly connected with the burner block 2 and not stressed each other.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the utility model. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims

1. The utility model provides a natural gas low-nitrogen combustion burner block which characterized in that: the burner block is horizontal hollow tubbiness structure, the burner block includes the four-section structure, and the direction according to the flue gas outflow is in proper order: the device comprises a transition sealing section, a mixing section, a first expansion section and a second expansion section; the mixing section, the first expanding section and the second expanding section are smoothly connected and are abutted in sequence; the expansion angle in the first expansion section is a first expansion angle, the length of the first expansion section in the horizontal direction is a first longitude length, the expansion angle in the second expansion section is a second expansion angle, the length of the second expansion section in the horizontal direction is a second longitude length, and the first expansion angle is at least 2.5 times of the second expansion angle; the first warp length is 1/2-3/4 of the second warp length.

2. The natural gas low-nitrogen combustion burner block of claim 1, wherein: the first divergence angle is designed to be larger as the burner power is increased, and the ratio of the first longitudinal length to the second longitudinal length is smaller.

3. The natural gas low-nitrogen combustion burner block of claim 1, wherein: the transition sealing section is connected with the burner, and a gap is filled between the transition sealing section and the burner by using high-alumina fiber cotton.

4. The natural gas low-nitrogen combustion burner block of claim 1, wherein: the mixing section is a horizontal pipeline section without an expansion angle inside, and the horizontal length of the mixing section is smaller than the first length.

5. The natural gas low-nitrogen combustion burner block of claim 1, wherein: and the axis of the burner block is coaxial with the axis of the burner when the burner block is installed.

6. The natural gas low-nitrogen combustion burner block of claim 1, wherein: the burner block is formed by splicing two halves which are uniformly split from an axis and bonded into a whole by using an adhesive.