阅读说明：本技术 一种螺旋式低氮燃烧器 (Spiral low-nitrogen combustor ) 是由 陈力 方毅波 张文科 俞海玲 谢辉 于 2021-09-17 设计创作，主要内容包括：本发明提供一种螺旋式低氮燃烧器,包括燃烧器本体,其左侧端设置为空气入口,燃烧器本体的外表面连通有氢气进气管,氢气进气管在燃烧器本体内部呈螺旋状分布,其尾部靠近空气入口部位,并连接氢气喷口,氢气可由此氢气进气管进入至燃烧器内部,与空气混合形成混合气体,并由设置于燃烧器本体右侧端的混合气出口排出。本发明所提供的螺旋式低氮燃烧器,配以独特的螺旋式氢气进气管,能够充分利用氢气能源,并使氢气和空气的混合更加均匀,增加了燃烧的安全性；同时,氢气浓度调节方便,只需要改变空气的流量便能有效调节混合气中氢气的浓度比例,能较大程度的适应不同浓度需求的燃烧。(The invention provides a spiral low-nitrogen burner which comprises a burner body, wherein the left side end of the burner body is provided with an air inlet, the outer surface of the burner body is communicated with a hydrogen inlet pipe, the hydrogen inlet pipe is spirally distributed in the burner body, the tail part of the hydrogen inlet pipe is close to the air inlet and is connected with a hydrogen nozzle, and hydrogen can enter the burner body from the hydrogen inlet pipe, is mixed with air to form mixed gas and is discharged from a mixed gas outlet arranged at the right side end of the burner body. The spiral low-nitrogen combustor provided by the invention is matched with the unique spiral hydrogen inlet pipe, so that the hydrogen energy can be fully utilized, the hydrogen and the air are mixed more uniformly, and the combustion safety is improved; meanwhile, the hydrogen concentration is convenient to adjust, the concentration proportion of hydrogen in the mixed gas can be effectively adjusted only by changing the flow of air, and the combustion of different concentration requirements can be adapted to a greater degree.)

1. The utility model provides a spiral low NOx burner, includes combustor body (1), combustor body (1) left side end sets up to air inlet (10), its characterized in that, combustor body (1) surface intercommunication hydrogen intake pipe (11), hydrogen intake pipe (11) are in combustor body (1) inside is the heliciform and distributes, the afterbody of hydrogen intake pipe (11) is close to air inlet (10) position, the right side end of combustor body (1) sets up to gas mixture export (7).

2. The helical low-nitrogen burner according to claim 1, wherein the hydrogen inlet pipe (11) is helically distributed in such a way that the diameter of the helix decreases by 50mm per revolution of the helix.

3. The spiral low-nitrogen burner according to claim 1, characterized in that the wall of the hydrogen inlet pipe (11) inside the burner body (1) is provided with a gap (3) facing the direction of the mixed gas outlet (7).

4. A spiral low-nitrogen burner according to claim 3, characterized in that the gap (3) has a size of 2-5 mm.

5. The spiral low-nitrogen burner according to claim 1, characterized in that the tail of the hydrogen inlet pipe (11) is connected with a hydrogen nozzle (12), and a plurality of vent holes (4) are arranged on the hydrogen nozzle (12).

6. The spiral low-nitrogen burner according to claim 1, characterized in that the inlet end of the hydrogen inlet pipe (11) is connected with a hydrogen inlet (6), a non-return device (5) is connected between the hydrogen inlet (6) and the hydrogen inlet pipe (11), and the non-return device (5) can be in an open or closed state according to different air flow directions.

7. The spiral low-nitrogen burner according to claim 6, characterized in that the check device (5) comprises an outer shell, a check plate (9) and a spring (8), one end of the outer shell is communicated with the hydrogen inlet (6), the other end of the outer shell is communicated with the hydrogen inlet pipe (11), one end of the spring (8) is connected with the check plate (9), the other end is connected with the hydrogen inlet (6), and the shape of the check plate (9) is matched with that of the hydrogen inlet (6).

8. The spiral low-nitrogen burner according to claim 1, characterized in that the spiral pipe body of the hydrogen inlet pipe (11) is connected with the burner body (1) through a fixing post (2).

Technical Field

The invention relates to the technical field of combustors, in particular to a spiral low-nitrogen combustor.

Background

Hydrogen is a very clean energy source because the combustion product of hydrogen only contains water, and nowadays when the industry is rapidly developed, the amount of hydrogen produced directly or indirectly as a byproduct is more and more, so how to effectively utilize the energy source is an urgent problem to be solved, and the combustion of a gas power plant is one of the ways of using hydrogen energy nowadays.

The hydrogen is a gas with high ignition point and small ignition energy, and is very easy to ignite, so that the flame propagation speed is very high, and the density of the hydrogen is very low. Meanwhile, in the process of burning hydrogen, the phenomena of backfire and deflagration are possible problems, and potential safety hazards can threaten equipment and personnel, so that the safe utilization of the hydrogen is particularly difficult. Most of the existing industrial hydrogen combustors are imported abroad, have high economic and maintenance cost, and cannot meet the requirement of domestic high-speed development.

Disclosure of Invention

In order to solve the technical problems, the invention provides the spiral low-nitrogen combustor, and the unique hydrogen gas inlet and nozzle device is arranged on the combustor, so that the hydrogen energy can be effectively utilized, and the aim of quickly and uniformly mixing hydrogen and air can be fulfilled.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a spiral low NOx burner, includes the combustor body, combustor body left side end sets up to air inlet, combustor body surface intercommunication hydrogen intake pipe, the hydrogen intake pipe is in the inside heliciform that is of combustor body distributes, the afterbody of hydrogen intake pipe is close to the air inlet position, the right side end of combustor body sets up to the mist export.

Preferably, the hydrogen inlet pipe is spirally distributed in a manner that the diameter of the spiral is reduced by 50mm every time the spiral rotates one circle.

Preferably, a gap is formed in the pipe wall of the hydrogen inlet pipe inside the burner body in the direction facing the mixed gas outlet.

Preferably, the size of the gap is 2-5 mm.

As a preferred scheme, the tail part of the hydrogen inlet pipe is connected with a hydrogen nozzle, and a plurality of vent holes are formed in the hydrogen nozzle.

As a preferred scheme, the inlet end of the hydrogen inlet pipe is connected with a hydrogen inlet, a non-return device is connected between the hydrogen inlet and the hydrogen inlet pipe, and the non-return device can be in an open or closed state according to different airflow directions.

Preferably, the check device comprises an external shell, a check plate and a spring, one end of the external shell is communicated with the hydrogen inlet, the other end of the external shell is communicated with the hydrogen inlet pipe, one end of the spring is connected with the check plate, the other end of the spring is connected with the hydrogen inlet, and the shape of the check plate is matched with that of the hydrogen inlet.

Preferably, the spiral pipe body of the hydrogen inlet pipe is connected with the burner body through a fixing column.

The invention is provided with the hydrogen inlet, and the hydrogen inlet is matched with a unique spiral distribution mode, and two air injection modes of a gap nozzle of the pipe wall of the spiral channel and a porous air injection mode of the hydrogen nozzle are utilized, so that the hydrogen and the air are mixed more uniformly, and the combustion safety is improved; meanwhile, the non-return device arranged at the air inlet of the hydrogen can also avoid safety accidents caused by hydrogen backflow. The hydrogen concentration is convenient to adjust, the concentration proportion of the hydrogen in the mixed gas can be effectively adjusted only by changing the flow of the air, and the combustion of different concentration requirements can be adapted to a greater degree. The invention has simple structure, convenient operation and low investment cost, and is suitable for popularization and use in the field of various hydrogen combustors.

Drawings

FIG. 1 is a schematic structural diagram of a spiral low-nitrogen burner of the present invention;

FIG. 2 is a schematic side view of a helical low-NOx burner of the present invention;

FIG. 3 is a schematic view of the appearance structure of a spiral low-nitrogen burner of the present invention;

fig. 4 is a schematic view of the internal structure of the check device of the present invention.

In the figure, 1, a burner body; 2. fixing a column; 3. a gap; 4. a vent hole; 5. a non-return device; 6. a hydrogen gas inlet; 7. a mixed gas outlet; 8. a spring; 9. a check plate; 10. an air inlet; 11. a hydrogen inlet pipe; 12. and (4) a hydrogen nozzle.

Detailed Description

Other advantages and features of the present invention will become readily apparent to those skilled in the art from the following detailed description, wherein it is to be understood that the invention is not limited to the specific embodiments disclosed, but is to be construed as limited only by the appended claims. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.

Referring to fig. 1-3, the invention discloses a spiral low-nitrogen burner, which comprises a burner body 1, wherein the burner body is cylindrical, the left end of the burner body is provided with an air inlet 10, air enters from the air inlet, the outer surface of the burner body 1 is communicated with a hydrogen inlet pipe 11, hydrogen can enter the burner from the hydrogen inlet pipe 11, and is mixed with the air to form mixed gas, and the mixed gas is discharged from a mixed gas outlet 7 arranged at the right end of the burner body 1. It is worth to say that hydrogen intake pipe 11 is the heliciform and distributes in combustor body 1 inside, and its afterbody is close to air inlet 10 position, and the afterbody still is connected with hydrogen spout 12, and this distribution mode can increase the area of contact of air and hydrogen to enlarge the mixing degree.

Specifically, the hydrogen nozzle 12 connected to the tail of the hydrogen inlet pipe 11 is in a circular tube shape, the outer surface and the port of the hydrogen inlet pipe are respectively provided with a plurality of circular vent holes 4 which are the first nozzle of hydrogen, the orientation of the hydrogen nozzle 12 is in the direction of the mixed gas outlet 7, and the arrangement mode can avoid the air entering the air inlet 10 from generating opposite impact, so that the speed of mixed gas flow is influenced.

Specifically, hydrogen intake pipe 11's heliciform distribution mode does, and the heliciform is the toper, specifically is every rotatory a week of helix, and the spiral diameter reduces 50mm, and its conical pointed end is close to air intlet, makes the hydrogen that hydrogen intake pipe 11 erupted can carry out intensive mixing with the air that air inlet 10 department got into.

In one embodiment, the spiral hydrogen inlet pipe 11 is located inside the burner body 1, the pipe wall of the spiral hydrogen inlet pipe is provided with a gap 3 facing the direction of the mixed gas outlet 7, the gap 3 is used as a second nozzle for injecting hydrogen, and the size of the gap 3 is set to be 2-5mm, which can ensure that the injected hydrogen has a certain speed.

Referring to fig. 3, in one embodiment, the inlet end of the hydrogen inlet pipe 11 is connected with a hydrogen inlet 6, a non-return device 5 is connected between the hydrogen inlet 6 and the hydrogen inlet pipe 11, the non-return device 5 can be in an open state or a closed state according to different gas flow directions, and the non-return device 5 is in the open state when the hydrogen gas flows towards the inner direction of the burner; when the airflow flows to the outside of the combustor, the check device 5 is in a closed state, and the arrangement can avoid potential safety hazards caused by hydrogen backflow.

Specifically, non return device 5 includes outside casing, non return board 9 and spring 8, outside casing is the up end and all is equipped with circular open-ended cylindricly down the terminal surface, the circular opening of terminal surface respectively with hydrogen air inlet 6 about it, hydrogen intake pipe 11 matches, the one end intercommunication hydrogen air inlet 6 of outside casing promptly, the other end intercommunication hydrogen intake pipe 11 of outside casing, hydrogen enters into non return device 5 through hydrogen air inlet 6, enter into the inside heliciform hydrogen intake pipe 11 of combustor behind the non return device 5. The shape of the check plate 9 is matched to the shape of the hydrogen inlet port 6 to ensure an optimum check effect, wherein the diameter of the outer housing is larger than the diameter of the hydrogen inlet pipe 11, and the diameter of the hydrogen inlet pipe 11 is larger than the diameter of the hydrogen inlet port 6.

One end of a spring 8 contained in the check device 5 is fixedly connected with the check plate 9, the other end of the spring is connected with the port of the hydrogen inlet pipe 11, the connection mode can adopt a welding or other fixed connection mode, and the fixed integral connection mode can reduce the maintenance cost and prolong the service life. In this embodiment, the number of the springs 8 is 2, and the springs are fixed on the left and right sides of the check plate 9, in other embodiments, a plurality of springs may be used, or other types of check devices, such as a snap-in check device, may be used. Further, non return device 5 can adopt stainless steel, ensures that non return device 5 can not influence the use because of rustting.

Further, the inside lateral wall of combustor body 1 is connected with fixed column 2 along the circumferencial direction, fixes spiral helicine 11 bodys in hydrogen intake pipe through this fixed column 2, and the angle interval of fixed column 2 is 90 to ensure fixed stability.

The spiral low-nitrogen combustor provided by the invention is matched with the unique spiral hydrogen inlet pipe, so that the hydrogen energy can be fully utilized, the hydrogen and the air are mixed more uniformly, and the combustion safety is improved; meanwhile, the hydrogen concentration is convenient to adjust, the concentration proportion of hydrogen in the mixed gas can be effectively adjusted only by changing the flow of air, and the combustion of different concentration requirements can be adapted to a greater degree. The invention has simple structure, convenient operation and low investment cost, and is suitable for popularization and use in the field of various hydrogen combustors.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed. The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.