CN112128754A

CN112128754A - Environment-friendly low-nitrogen combustor

Info

Publication number: CN112128754A
Application number: CN202011106607.XA
Authority: CN
Inventors: 吴胜强; 韩立波; 韩位京; 乔泽超; 豆清波
Original assignee: Xingtai Xinbang Heating Equipment Co ltd
Current assignee: Xingtai Xinbang Heating Equipment Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2020-12-25

Abstract

The invention relates to the technical field of burners, in particular to an environment-friendly low-nitrogen burner which comprises a central gas pipe, an air duct, a double-layer cavity and an ejector, wherein the central gas pipe is arranged in the air duct, the double-layer cavity is arranged outside the air duct, the ejector is arranged in one end of the double-layer cavity, cavities are respectively formed between the ejector and the double-layer cavity and between the ejector and the air duct, a fan is arranged at one end of the air duct far away from the ejector, and one end of the central gas pipe far away from the ejector and one end of the double-layer cavity far away from the ejector are both connected with natural gas pipes. Compared with the prior art, the invention has the following beneficial effects: according to the invention, through the internal circulation design, the waste gas after primary combustion is sucked into the combustion head for secondary combustion, so that the discharged waste gas is cleaner; compared with the existing external circulation system, the internal circulation system has a simple structure and occupies small space.

Description

Environment-friendly low-nitrogen combustor

Technical Field

The invention relates to the technical field of combustors, in particular to an environment-friendly low-nitrogen combustor.

Background

A burner is a device for ejecting and mixing fuel and air in a certain manner, and is widely used in the fields of civil use, industry, agriculture, and the like. The existing burner only has the function of jet combustion, and can not recover and reburn gas with insufficient combustion, so that the discharged waste gas can not reach the national standard, an external circulation system is required to be additionally arranged on an exhaust pipeline, and the gas with insufficient combustion is subjected to secondary combustion to ensure that the waste gas reaches the national emission standard. Although the method of using the external circulation system to carry out secondary combustion enables the waste gas to meet the national emission standard, the external circulation system not only has a complex structure and large occupied space, but also can not fully combust the waste gas of primary combustion.

Therefore, how to design a burner which has a simple structure and can make the discharged waste gas cleaner becomes a problem to be solved at present.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an environment-friendly low-nitrogen combustor, which solves the problems that the existing external circulation combustor is complex in structure, large in occupied space and incapable of fully combusting waste gas.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an environmental protection low-nitrogen combustor, includes central gas pipe, dryer, double-deck cavity, ejector, central gas pipe sets up in the dryer, double-deck cavity sets up in the dryer outside, the ejector sets up inside double-deck cavity one end, be the cavity between ejector and the double-deck cavity, between ejector and the dryer, the one end that the ejector was kept away from to the dryer is equipped with the fan, central combustion pipe keeps away from ejector one end and double-deck cavity and keeps away from ejector one end and all is connected with natural gas pipe.

The double-layer cavity is internally provided with a baffle close to the ejector, the baffle is fixedly connected with the air duct, a cavity is formed between the end part of the double-layer cavity and the air duct, and the baffle is provided with a plurality of flow dividing pipes.

The end part of the shunt pipe is an inclined plane notch, and the inclined plane of the inclined plane notch faces the center of the ejector.

The inclined plane notch is provided with a cover plate, and the cover plate is provided with a plurality of ventilation holes.

The ejector is provided with an ejector outer tube and an ejector inner tube, a plurality of fixing plates are arranged between the ejector outer tube and the ejector inner tube, and a plurality of fixing plates are arranged between the ejector outer tube and the double-layer cavity.

The central gas pipe is connected with the air duct through a support frame.

And a flame stabilizing disc is arranged at the end part of the central gas pipe close to one end of the ejector.

The end part of the air duct close to one end of the ejector is conical.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, through the internal circulation design, the waste gas after primary combustion is sucked into the combustion head for secondary combustion, so that the discharged waste gas is cleaner; compared with the existing external circulation system, the internal circulation system has a simple structure and occupies small space.

Drawings

FIG. 1 is a perspective view of the present invention

FIG. 2 is a partial cross-sectional view of the present invention

FIG. 3 is a sectional view taken along A-A in FIG. 2

FIG. 4 is a schematic view of the natural gas trend of the present invention

FIG. 5 is a schematic view of the combustion air flow direction of the present invention

FIG. 6 is a schematic view of the waste gas trend of the present invention

In the figure: 1. a central gas pipe; 2. an air duct; 3. a double-layer chamber; 4. an ejector; 5. a fan; 6. a natural gas pipe; 7. a baffle plate; 8. a shunt tube; 9. a cover plate; 10. an ejector outer tube; 11. an ejector inner tube; 12. a fixing plate; 13. a support frame; 14. a flame stabilizing disc.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

As shown in fig. 1-6, a low nitrogen combustor of environmental protection, including central gas pipe 1, dryer 2, double-deck cavity 3, ejector 4, central gas pipe 1 sets up in dryer 2, double-deck cavity 3 sets up in dryer 2 outside, ejector 4 sets up inside 3 one ends of double-deck cavity, be the cavity between ejector 4 and the double-deck cavity 3, between ejector 4 and the dryer 2, the one end that ejector 4 was kept away from to dryer 2 is equipped with fan 5, central gas pipe 1 keeps away from ejector 4 one end and double-deck cavity 3 and keeps away from ejector 4 one end and all is connected with natural gas pipe 6.

The utility model discloses a fan dryer, including double-deck cavity 3, ejector 4, baffle 7 and dryer 2 fixed connection, be the cavity between 3 tip of double-deck cavity and the dryer 2, be equipped with a plurality of shunt tubes 8 on the baffle 7.

The end part of the shunt pipe 8 is an inclined plane notch, and the inclined plane of the inclined plane notch faces the center of the ejector 4.

The inclined plane notch is provided with a cover plate 9, and the cover plate 9 is provided with a plurality of ventilation holes.

The ejector 4 is provided with an ejector outer tube 10 and an ejector inner tube 11, a plurality of fixing plates 12 are arranged between the ejector outer tube 10 and the ejector inner tube 11, and a plurality of fixing plates 12 are arranged between the ejector outer tube 10 and the double-layer cavity 3.

The central gas pipe 1 is connected with the air duct 2 through a support frame 13.

And a flame stabilizing disc 14 is arranged at the end part of the central gas pipe 1 close to one end of the ejector 4.

The end part of the air duct 2 close to one end of the ejector 4 is conical.

The working principle of the present invention is explained as follows:

the fan blows combustion-supporting air into the air duct 2, the conical design of the end part of the air duct 2 close to the ejector 4 enables the outer-ring combustion-supporting air to be accelerated and enter a cavity between the ejector outer tube 10 and the ejector inner tube 11 when passing through the conical design, the inner-ring combustion-supporting air enters the ejector inner tube 11 at a constant speed, a negative pressure cavity is formed between the ejector outer tube 10 and the ejector inner tube 11 due to the flow speed difference, the waste gas after combustion can be pressed into the negative pressure cavity through the cavity between the double-layer cavity 3 and the flow dividing tube 8 under the atmospheric pressure, the waste gas is sprayed out along with the combustion-supporting air again to perform secondary combustion, and internal.

Natural gas pipe lets in the natural gas to double-deck cavity 3 and central gas pipe 1 respectively, and the vent blowout that sets up on the apron 9 of steady flame dish 14 and shunt tubes 8 that is equipped with on the natural gas pipe 1, and spun natural gas mixes with combustion-supporting air and waste gas, ignites through some firearm, the abundant burning.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An environmental protection low-nitrogen burner which is characterized in that: including central gas pipe (1), dryer (2), double-deck cavity (3), ejector (4), central gas pipe (1) sets up in dryer (2), double-deck cavity (3) set up in dryer (2) outside, ejector (4) set up inside double-deck cavity (3) one end, be the cavity between ejector (4) and double-deck cavity (3), between ejector (4) and dryer (2), the one end that ejector (4) were kept away from in dryer (2) is equipped with fan (5), ejector (4) one end and double-deck cavity (3) are kept away from in central burning pipe (1) are kept away from ejector (4) one end and double-deck cavity (3) and are kept away from ejector (4) one end and all be connected with natural gas pipe (6).

2. The environmentally friendly low-nitrogen burner of claim 1, wherein: double-deck cavity (3) inside is close to ejector (4) position department and is equipped with baffle (7), baffle (7) and dryer (2) fixed connection have the cavity between double-deck cavity (3) tip and dryer (2), be equipped with a plurality of shunt tubes (8) on baffle (7).

3. The environmentally friendly low-nitrogen burner of claim 2, wherein: the end part of the shunt pipe (8) is an inclined plane notch, and the inclined plane of the inclined plane notch faces the center of the ejector (4).

4. The environmentally friendly low-nitrogen burner of claim 3, wherein: the inclined plane notch is provided with a cover plate (9), and the cover plate (9) is provided with a plurality of ventilation holes.

5. The environmentally friendly low-nitrogen burner of claim 1, wherein: the ejector (4) is provided with an ejector outer tube (10) and an ejector inner tube (11), a plurality of fixing plates (12) are arranged between the ejector outer tube (10) and the ejector inner tube (11), and a plurality of fixing plates (12) are arranged between the ejector outer tube (10) and the double-layer cavity (3).

6. The environmentally friendly low-nitrogen burner of claim 1, wherein: the central gas pipe (1) is connected with the air duct (2) through a support frame (13).

7. The environmentally friendly low-nitrogen burner of claim 1, wherein: and a flame stabilizing disc (14) is arranged at the end part of the central gas pipe (1) close to one end of the ejector (4).

8. The environmentally friendly low-nitrogen burner of claim 1, wherein: the end part of the air duct (2) close to one end of the ejector (4) is conical.