Flue gas backflow low-nitrogen burner

Abstract

The utility model discloses a flue gas backflow low-nitrogen combustor, which relates to the technical field of combustion, and comprises a shell, a mounting pipe is arranged in the shell, the mounting pipe and the shell are concentric and coaxial, a main combustion pipe is arranged in the center of the interior of the mounting pipe, a circle of auxiliary combustion pipe surrounds the periphery of the main combustion pipe, and the auxiliary combustion pipe is arranged in the shell. One end of the shell is fixedly connected with an air inlet pipe, the main combustion pipe is inserted into the air inlet pipe, the main combustion pipe is fixed into the mounting pipe through a mounting piece, and a mounting groove is formed in one side of the auxiliary combustion pipe. Negative pressure can be generated at the position of the through hole of the inclined plate when the rotational flow fan works, then a mixture of unburned materials and smoke of the gas pipe can be adsorbed into the inner space of the installation pipe and the shell and discharged into the auxiliary combustion pipe through the rotational flow fan to be combusted again, the combustion efficiency of equipment is improved, the installation piece is arranged, and the combustion efficiency of the equipment is improved. During use, the main combustion tube and the auxiliary combustion tube can be mounted in the mounting tube very stably under the action of the mounting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion, in particular to a flue gas reflow low-nitrogen burner. Background Art

[0002] With the rapid development of my country's society and economy, energy consumption has also increased rapidly, NOX emissions have also been growing, and environmental problems have become increasingly serious. It has become one of the main factors threatening human sustainable development. In recent years, the country's requirements for emission indicators have become increasingly stringent. Therefore, further controlling nitrogen oxide (NOX) emissions is crucial to the sustainable development of the national economy and environmental protection. The generation of NOX is divided into three categories, namely thermal NOX, rapid NOX, and fuel NOX. The nitrogen content in natural gas is relatively low, so the main sources of NOx are thermal NOX and rapid NOX. Thermal NOX is generated by N2 and O2 in the air at high temperatures during combustion. The main influencing factors are reaction temperature, concentration of N2 and O2 during reaction, and residence time. The most critical influencing factor is reaction temperature. Rapid NOx is generated by a series of reactions between N2 in the air and hydrocarbon groups in the fuel.

[0003] Nitrogen oxides (NOx) are one of the main pollutants in the atmosphere. They can not only form acid rain, but are also the key precursor to the formation of PM2.5. Therefore, further controlling nitrogen oxide (NOx) emissions is crucial to sustainable development. For natural gas boilers, it is urgent to develop high-efficiency, low-nitrogen burners. Therefore, the utility model proposes a flue gas reflow low-nitrogen burner. Utility Model Content

[0004] Technical issues solved

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and provide a flue gas reflow low-nitrogen burner.

[0006] Technical Solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas reflow low nitrogen burner, comprising a shell, a mounting tube is arranged inside the shell, the mounting tube is concentric and coaxial with the shell, a main combustion tube is arranged at the inner center of the mounting tube, a circle of auxiliary combustion tube surrounds the outer circumference of the main combustion tube, an air inlet pipe is fixedly connected to one end of the shell, the main combustion tube is inserted into the inside of the air inlet pipe, the main combustion tube is fixed to the inside of the mounting tube by a mounting member, a mounting groove is arranged on one side of the auxiliary combustion tube, a swirl fan is arranged inside the mounting groove, the swirl fan can generate negative pressure at the through hole of the inclined plate when it is working, and then the mixture of unburned material and flue gas in the gas pipe can be adsorbed into the internal space of the mounting tube and the shell, and discharged into the auxiliary combustion tube through the swirl fan for re-combustion, thereby improving the combustion efficiency of the equipment, the air inlet pipe is used to discharge air, the main combustion tube is used for main combustion, and the auxiliary combustion tube is used for combustion of reflowing flue gas, the combustion effect is good, and a mounting member is provided, when in use, the main combustion tube and the auxiliary combustion tube can be very stably installed in the mounting tube under the action of the mounting member.

[0008] Preferably, the mounting member comprises an annular body, a plurality of insertion holes are provided inside the annular body, the auxiliary combustion tube is inserted in the insertion holes, and the main combustion tube is inserted in the center of the annular body.

[0009] Preferably, a groove is formed on one side of the mounting tube, and the groove is arranged in a plurality of evenly spaced portions.

[0010] Preferably, an inclined plate is provided on one side of the shell, a through hole is opened inside the inclined plate, and the number of the through holes is plural.

[0011] Preferably, a combustion head is provided at one end of the main combustion tube.

[0012] Preferably, a second combustion head is provided at one end of the auxiliary combustion tube.

[0013] Preferably, the air inlet pipe is communicated with the mounting pipe.

[0014] Preferably, a threaded hole is provided inside the annular body, and the internal thread of the threaded hole is connected to a limiting bolt.

[0015] Beneficial effects:

[0016] Compared with the existing technology, the flue gas reflow low nitrogen burner has the following beneficial effects:

[0017] 1. The swirl fan of the utility model can generate negative pressure at the through hole of the inclined plate, thereby adsorbing the mixture of unburned materials and smoke in the gas pipe into the internal space of the mounting pipe and the shell, and discharge it into the auxiliary combustion pipe through the swirl fan for re-combustion, thereby improving the combustion efficiency of the equipment.

[0018] 2. The air inlet pipe of the utility model is used to discharge air, the main combustion pipe is used for main combustion, and the auxiliary combustion pipe is used for combustion of reflux flue gas. The combustion effect is good, and mounting parts are provided. When in use, the main combustion pipe and the auxiliary combustion pipe can be very stably installed in the mounting pipe under the action of the mounting parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the mounting piece of the utility model.

[0022] In the figure:

[0023] 1. Shell; 101. Inclined plate; 102. Through hole; 2. Mounting tube; 201. Groove; 3. Main combustion tube; 4. Auxiliary combustion tube; 5. Air inlet tube; 6. Mounting piece; 601. Ring body; 602. Socket; 603. Threaded hole; 604. Limit bolt; 7. Mounting groove; 8. Swirl fan; 9. Combustion head; 10. Second combustion head. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 to Figure 3As shown, the utility model provides a technical solution: a flue gas reflow low-nitrogen burner, including a shell 1, a mounting tube 2 is arranged inside the shell 1, the mounting tube 2 is concentric and coaxial with the shell 1, a main combustion tube 3 is arranged at the center of the inner part of the mounting tube 2, and a circle of auxiliary combustion tube 4 surrounds the outer circumference of the main combustion tube 3, one end of the shell 1 is fixedly connected with an air inlet pipe 5, the air inlet pipe 5 is communicated with the mounting tube 2, the main combustion tube 3 is plugged into the inside of the air inlet pipe 5, the main combustion tube 3 is fixed to the inside of the mounting tube 2 by a mounting member 6, and a mounting groove 7 is arranged on one side of the auxiliary combustion tube 4, and the inner part of the mounting groove 7 is mounted There is a swirl fan 8, and the air inlet pipe 5 is used to discharge air. The main combustion pipe 3 is used for main combustion, and the auxiliary combustion pipe 4 is used for combustion of reflux flue gas. The combustion effect is good, and a mounting member 6 is provided. When in use, the main combustion pipe 3 and the auxiliary combustion pipe 4 can be very firmly installed in the mounting pipe 2 under the action of the mounting member 6. The operation of the swirl fan 8 can generate negative pressure at the through hole 102 of the inclined plate 101, and then the mixture of unburned material and flue gas in the gas pipe can be adsorbed into the internal space of the mounting pipe 2 and the shell 1, and discharged into the auxiliary combustion pipe 4 through the swirl fan 8 for re-combustion, thereby improving the combustion efficiency of the equipment.

[0026] Please pay attention to Figure 3 The mounting member 6 includes an annular body 601, a plurality of insertion holes 602 are provided inside the annular body 601, the auxiliary combustion tube 4 is plugged into the inside of the insertion hole 602, the main combustion tube 3 is plugged into the center of the annular body 601, a threaded hole 603 is provided inside the annular body 601, and the internal thread of the threaded hole 603 is connected to a limiting bolt 604.

[0027] Please pay attention to Figure 1 and Figure 2 One side of the mounting tube 2 is provided with a plurality of evenly arranged grooves 201, the mounting groove 7 is installed inside the groove 201, one side of the shell 1 is provided with an inclined plate 101, the interior of the inclined plate 101 is provided with a through hole 102, and the number of the through holes 102 is multiple, a combustion head 9 is provided at one end of the main combustion tube 3, and a second combustion head 10 is provided at one end of the auxiliary combustion tube 4.

[0028] Working principle: the air inlet pipe 5 is used to discharge air, the main combustion pipe 3 is used for main combustion, and the auxiliary combustion pipe 4 is used for combustion of reflux flue gas, with good combustion effect, and a mounting member 6 is provided. When in use, the main combustion pipe 3 and the auxiliary combustion pipe 4 can be very firmly installed in the mounting pipe 2 under the action of the mounting member 6, and the swirl fan 8 can generate negative pressure at the through hole 102 of the inclined plate 101, thereby adsorbing the mixture of unburned material and flue gas in the gas pipe into the internal space of the mounting pipe 2 and the shell 1, and discharged into the auxiliary combustion pipe 4 through the swirl fan 8 for re-combustion, thereby improving the combustion efficiency of the equipment.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas reflow low nitrogen burner, comprising a housing (1), characterized in that: A mounting tube (2) is arranged inside the shell (1), the mounting tube (2) is coaxial with the shell (1), a main combustion tube (3) is arranged at the center of the mounting tube (2), a circle of auxiliary combustion tubes (4) surrounds the outer circumference of the main combustion tube (3), an air inlet tube (5) is fixedly connected to one end of the shell (1), the main combustion tube (3) is inserted into the inside of the air inlet tube (5), the main combustion tube (3) is fixed to the inside of the mounting tube (2) through a mounting member (6), a mounting groove (7) is arranged on one side of the auxiliary combustion tube (4), and a swirl fan (8) is installed inside the mounting groove (7).

2. A flue gas reflow low nitrogen burner according to claim 1, characterized in that: The mounting member (6) comprises an annular body (601), a plurality of insertion holes (602) are provided inside the annular body (601), the auxiliary combustion tube (4) is inserted into the insertion holes (602), and the main combustion tube (3) is inserted into the center of the annular body (601).

3. The flue gas reflow low nitrogen burner according to claim 1, characterized in that: A groove (201) is provided on one side of the installation tube (2).

4. A flue gas reflow low nitrogen burner according to claim 3, characterized in that: The grooves (201) are provided in a plurality and are evenly arranged.

5. The flue gas reflow low nitrogen burner according to claim 1, characterized in that: An inclined plate (101) is provided on one side of the housing (1), and a through hole (102) is provided inside the inclined plate (101).

6. A flue gas reflow low nitrogen burner according to claim 5, characterized in that: There are multiple through holes (102).

7. The flue gas reflow low nitrogen burner according to claim 1, characterized in that: A combustion head (9) is provided at one end of the main combustion tube (3).

8. The flue gas reflow low nitrogen burner according to claim 1, characterized in that: A second combustion head (10) is provided at one end of the auxiliary combustion tube (4).

9. The flue gas reflow low nitrogen burner according to claim 1, characterized in that: The air inlet pipe (5) is in communication with the mounting pipe (2).

10. The flue gas reflow low nitrogen burner according to claim 2, characterized in that: A threaded hole (603) is provided inside the annular body (601), and a limit bolt (604) is connected to the inner thread of the threaded hole (603).

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