CN219607083U

CN219607083U - Novel ultralow nitrogen combustor flame on duty

Info

Publication number: CN219607083U
Application number: CN202223601043.4U
Authority: CN
Inventors: 宋少鹏; 张合; 朱俊军
Original assignee: Jiaxing Jiedu Technology Co ltd
Current assignee: Jiaxing Jiedu Technology Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-08-29
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a novel duty flame of an ultralow nitrogen burner, which is characterized by comprising a duty flame main pipeline, tree-shaped distribution fuel pipes, tangential nozzle fuel pipes, a swirl disk, an inner sleeve, swirl blades and an outer sleeve. The gas and air can be quickly and uniformly mixed, the characteristic of pneumatic stability of the axial cutting tubular flame is utilized, the device can adapt to various low-heat-value gases and various working conditions with high excess air coefficient, and meanwhile, the effect of low-nitrogen combustion is achieved.

Description

Novel ultralow nitrogen combustor flame on duty

Technical Field

The utility model relates to the technical field of industrial gas burner combustion, in particular to a novel ultralow nitrogen burner duty flame.

Background

In recent years, with the development of industrial technology, industrial production has greatly changed various aspects of society, and the demand for fuel in the industrial field has been gradually increased. Natural gas is the cleanest of the tri-petrochemical energy sources compared to coal and oil, and thus natural gas is gradually transformed from alternative energy sources to main energy sources.

However, as the amount of natural gas increases, natural gas combustion will become a significant source of NOx pollution. NOx generated by combustion in an industrial gas boiler is mainly thermal NOx and rapid NOx, and as main pollutants in the current gas combustion, NOx brings about a series of environmental problems such as acid rain, photochemical smog, tropospheric ozone consumption, global warming and the like.

The flue gas recirculation technology is one of the most widely used methods for reducing the emission of nitrogen oxides in the current industrial gas boilers; the internal circulation of the flue gas is realized by the structural design of the burner and the hearth, so that the flue gas flows back through the gas dynamics and is mixed with fuel near the burner head again to react, the oxygen content of fuel combustion is reduced, the emission of NOx is reduced, and theoretically, the more the flue gas sucked back is, the better the nitrogen reducing effect is. Because the nitrogen oxide reducing agent does not occupy space and cost, the nitrogen oxide reducing agent gradually replaces the flue gas external circulation technology in a gas boiler and can achieve better nitrogen oxide reducing effect. However, there is a problem that the more high-temperature flue gas is sucked back into the burner, the more likely the flame instability is caused, and the nitrogen reducing effect is affected.

Disclosure of Invention

The utility model provides a novel flame on duty of an ultralow nitrogen burner, which can solve the problem of unstable flame caused by too much high-temperature smoke sucked back into the burner.

The utility model provides a novel duty flame of an ultralow nitrogen burner, which is characterized by comprising a main duty flame pipeline, tree-shaped distribution fuel pipes, tangential nozzle fuel pipes, a swirl disk, an inner sleeve, swirl blades and an outer sleeve; the central cylindrical blunt body is fixedly arranged at the upper end of the on-duty flame main pipeline; the tree-shaped distribution fuel pipes are L-shaped pipelines, four tree-shaped distribution fuel pipes are fixedly arranged on the outer wall of the on-duty flame main pipeline, and in the vertical direction, the four tree-shaped distribution fuel pipes are positioned at the same height; the tangential jet fuel pipes are L-shaped pipelines, two tangential jet fuel pipes are fixedly arranged on the outer wall of the on-duty flame main pipeline, and in the vertical direction, the two tangential jet fuel pipes are positioned at the same height; the cyclone disc is fixedly arranged on the outer wall of the on-duty flame main pipeline, and a plurality of spray holes are formed in the cyclone disc; the inner sleeve is fixedly arranged on the outer side of the cyclone disc; the swirl vanes are fixedly arranged on the outer side of the inner sleeve along a circumferential array respectively; the outer sleeve is fixedly connected to the outer side of the swirl vane, and the upper end of the outer sleeve is higher than the tangential nozzle fuel pipe.

In one embodiment, in the overlooking direction, the central axis of the main flame pipe on duty is used as the center of a circle, and the included angles between two adjacent tree-shaped distribution fuel pipes are 90 degrees.

In one embodiment, in the overlooking direction, the central axis of the main flame pipe on duty is used as the center of a circle, the included angle between two fuel pipes with tangential nozzles is 180 degrees, and the included angle between each fuel pipe with tangential nozzles and two adjacent fuel pipes with tree-shaped distribution is 45 degrees.

In one embodiment, the plurality of spray holes are equidistantly arranged on the cyclone disc according to a circumferential array, and the plurality of spray holes have the same size.

In one embodiment, the orifice has a diameter of 3-5mm.

In one embodiment, the swirl blades are arranged in an inclined manner, and the included angle between the swirl blades and the horizontal plane is 30-60 degrees.

In summary, in the utility model, the novel ultralow nitrogen burner duty flame has the following beneficial effects compared with the prior art: the gas and air can be quickly and uniformly mixed, the characteristic of pneumatic stability of the axial cutting tubular flame is utilized, the device can adapt to various low-heat-value gases and various working conditions with high excess air coefficient, and meanwhile, the effect of low-nitrogen combustion is achieved.

Drawings

In order to better and clearly describe the embodiments of the present utility model or the technical solutions in the background art, the following description will describe the drawings used in the embodiments of the present utility model or the background art.

FIG. 1 is an overall structural view of a novel ultra-low nitrogen burner duty flame;

FIG. 2 is a top view of a novel ultra-low nitrogen burner duty flame;

FIG. 3 is a view of the overall structure of the novel ultra-low nitrogen burner on duty flame with the outer sleeve removed.

In the figure, 1, a main flame pipeline on duty; 2. a central cylindrical blunt body; 3. tree-like distribution of fuel pipes; 4. tangential jet fuel pipes; 5. rectangular nozzle; 6. a swirl disk; 7. a spray hole; 8. an inner sleeve; 9. swirl vanes; 10. an outer sleeve.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the attached drawings; the following examples are illustrative of the utility model and are not intended to limit the scope of the utility model. And the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the terms "comprising" or "includes" and the like in this disclosure is intended to cover an element or article listed after that term and equivalents thereof without precluding other elements or articles. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Referring to fig. 1, a novel flame on duty of an ultra-low nitrogen burner is characterized by comprising a main flame pipe 1 on duty, a tree-shaped distribution fuel pipe 3, a tangential nozzle fuel pipe 4, a swirl disk 6, an inner sleeve 8, swirl blades 9 and an outer sleeve. 10

Referring to fig. 3, in the present utility model, the end of the main flame pipe 1 with the central cylindrical blunt body 2 is set to be up, and the end without the central cylindrical blunt body 2 is set to be down.

Referring to fig. 1 and 3, the on-duty flame main pipe 1 is a hollow pipe for transporting fuel, and the central cylinder blunt body 2 is fixedly arranged at the upper end of the on-duty flame main pipe 1 and is used for sealing the upper end of the on-duty flame main pipe 1.

Referring to fig. 2 and 3, the tree-shaped distribution fuel pipes 3 are L-shaped pipes, four tree-shaped distribution fuel pipes 3 are fixedly arranged on the outer wall of the on-duty flame main pipe 1, the lower ends of the tree-shaped distribution fuel pipes 3 are communicated with the on-duty flame main pipe 1, the tail ends of the tree-shaped distribution fuel pipes 3 are opened, and the opening direction is along the axial direction of the position where the opening is located and is used for spraying fuel. In the vertical direction, four tree-like distributed fuel pipes 3 are located at the same height. In one embodiment, in the overlooking direction, the central axis of the on-duty flame main pipeline 1 is used as the center of a circle, and the included angles between two adjacent tree-shaped distribution fuel pipes 3 are 90 degrees, so that the effect of outputting fuel by the tree-shaped distribution fuel pipes 3 is more uniform, and the structure of the on-duty flame is more stable.

Referring to fig. 2 and 3, the tangential jet fuel pipes 4 are also L-shaped pipes, two tangential jet fuel pipes 4 are also fixedly arranged on the outer wall of the on-duty flame main pipe 1, the lower end of each tangential jet fuel pipe 4 is also communicated with the on-duty flame main pipe 1, the tail end of each tangential jet fuel pipe 4 is sealed, a rectangular jet 5 is arranged on the pipe wall at the upper end of each tangential jet fuel pipe 4, and the arrangement direction of each rectangular jet 5 is along the circumferential direction of a circle taking the central axis of the on-duty flame main pipe 1 as the center of the circle, so as to be used for jetting fuel tangential to on-duty flame. In the vertical direction, two tangential jet fuel pipes 4 are located at the same height, and the height of the rectangular jet 5 is higher than the height of the upper end of the tree-shaped distribution fuel pipe 3. In one embodiment, in a top view direction, an included angle between two tangential jet fuel pipes 4 is 180 ° with a central axis of the on-duty flame main pipe 1 as a center, and an included angle between each tangential jet fuel pipe 4 and two adjacent tree-shaped distribution fuel pipes 3 is 45 °. By the arrangement, the tangential jet fuel pipe 4 outputs fuel tangentially along the flame on duty more uniformly, and is more beneficial to manufacturing the axial cutting tubular flame with stable structure.

Referring to fig. 1, 2 and 3, in one embodiment, the swirling disc 6 is circular, the swirling disc 6 is fixedly arranged on the outer wall of the on-duty flame main pipe 1 in a welding manner, ten spray holes 7 are formed in the swirling disc 6, and the spray holes 7 vertically penetrate through the swirling disc 6. Further, ten spray holes 7 are equidistantly arranged on the cyclone disk 6 according to a circumferential array, the ten spray holes 7 are identical in size, the aperture of each spray hole 7 is 3-5mm, the spray holes 7 with the size can meet the flow speed requirement of 40-60m/s, and the high-speed jet flow is more beneficial to sucking the hearth flue gas to realize the internal circulation of the flue gas, so that the low-nitrogen effect is achieved.

Referring to fig. 1, 2 and 3, the inner sleeve 8 is fixed on the outer side of the swirl disk 6, and the inner sleeve 8 provides an installation position for the swirl vanes 9. In one embodiment, twelve swirl blades 9 are respectively fixed on the outer side of the inner sleeve 8 along a circumferential array, the swirl blades 9 are obliquely arranged, and an included angle between the swirl blades 9 and a horizontal plane is 30-60 degrees.

Referring to fig. 1 and 2, the outer sleeve is fixedly connected to the outer side of the swirl vane 9, the upper end of the outer sleeve is higher than the tangential jet fuel pipe 4, and the outer sleeve can form stable swirl flame around the inner wall of the outer sleeve by the fuel ejected from the tangential jet fuel pipe 4.

Claims

1. The novel flame on duty of the ultralow nitrogen burner is characterized by comprising a flame main pipe (1) on duty, a central cylinder blunt body (2), tree-shaped distribution fuel pipes (3), tangential nozzle fuel pipes (4), a swirl disk (6), an inner sleeve (8), swirl blades (9) and an outer sleeve;

the central cylindrical blunt body (2) is fixedly arranged at the upper end of the on-duty flame main pipeline (1); the tree-shaped distribution fuel pipes (3) are L-shaped pipelines, four tree-shaped distribution fuel pipes (3) are fixedly arranged on the outer wall of the on-duty flame main pipeline (1), and in the vertical direction, the four tree-shaped distribution fuel pipes (3) are located at the same height; the tangential jet fuel pipes (4) are L-shaped pipelines, two tangential jet fuel pipes (4) are fixedly arranged on the outer wall of the on-duty flame main pipeline (1), and in the vertical direction, the two tangential jet fuel pipes (4) are positioned at the same height; the cyclone disc (6) is fixedly arranged on the outer wall of the on-duty flame main pipeline (1), and a plurality of spray holes (7) are formed in the cyclone disc (6); the inner sleeve (8) is fixedly arranged at the outer side of the cyclone disc (6); the swirl vanes (9) are fixedly arranged outside the inner sleeve (8) along a circumferential array respectively; the outer sleeve is fixedly connected to the outer side of the swirl vane (9), and the upper end of the outer sleeve is higher than the tangential nozzle fuel pipe (4).

2. The novel ultra-low nitrogen burner on-duty flame according to claim 1, wherein in the overlooking direction, the central axis of the main flame on-duty pipeline (1) is used as the center of a circle, and the included angle between two adjacent tree-shaped distribution fuel pipelines (3) is 90 degrees.

3. The novel ultra-low nitrogen burner on duty flame according to claim 2, wherein in the overlooking direction, the included angle between two tangential jet fuel pipes (4) is 180 degrees, and the included angle between each tangential jet fuel pipe (4) and two adjacent tree-shaped distribution fuel pipes (3) is 45 degrees by taking the central axis of the main flame on duty pipe (1) as the center of a circle.

4. The novel ultra-low nitrogen burner on-duty flame according to claim 1, wherein a plurality of spray holes (7) are equidistantly arranged on the cyclone disc (6) according to a circumferential array, and the spray holes (7) are the same in size.

5. The novel ultra-low nitrogen burner duty flame of claim 4, wherein said orifice (7) has a pore size of 3-5mm.

6. A new ultra low nitrogen burner duty flame as claimed in claim 1, wherein said swirl vanes (9) are inclined, said swirl vanes (9) being at an angle of 30 ° -60 ° to the horizontal.