Multi-pipe anti-blocking low-nitrogen burner

Abstract

The utility model discloses a multi-pipe anti-blocking low-nitrogen burner which comprises a combustion-supporting mechanism, a gas mechanism is installed at one end of the combustion-supporting mechanism, and a connecting mechanism is installed at the other end of the combustion-supporting mechanism. By arranging the flow dividing mechanism, in the using process of the burner, fuel gas can move to the throat through the auxiliary pipeline, the main pipeline and the inner pipeline, combustion-supporting gas moves to the throat through the outer side of the auxiliary pipeline and the inner pipeline, and meanwhile coal gas moves to the throat through the gas inlet pipe; fuel gas, coal gas and combustion-supporting gas are uniformly mixed at the throat through the rotational flow frame, so that the gas is more sufficient, the generation of nitrogen is reduced, the fuel is sharply expanded when sprayed out from the nozzle in the combustion process, a negative pressure area is generated at the central part at the moment, and the combustion efficiency is improved. Smoke generated in the combustion process can be sucked back to the burner block to be subjected to secondary combustion, internal circulation of the smoke is achieved, and therefore nitric oxide generated by the combustor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a multi-tube anti-blocking low-nitrogen burner. Background Art

[0002] A burner is a general term for devices that spray fuel and air in a specific manner for mixed combustion. Burners are categorized by type and application into industrial burners, combustion engines, civilian burners, and specialty burners. They are often made of corrosion-resistant and high-temperature-resistant materials such as stainless steel or titanium. The function of a burner is to atomize the sample through flame combustion. Atomized test liquid enters the burner and, under the influence of the flame temperature and atmosphere, undergoes drying, melting, evaporation, and dissociation, producing a large number of ground-state atoms, as well as some excited-state atoms, ions, and molecules. A well-designed burner should exhibit high atomization efficiency, low noise, and stable flame to ensure high absorption sensitivity and measurement precision. Slit burners are commonly used to generate atomic vapor in atomic absorption spectrometry. The length and width of the burner slit vary depending on the type of gas and combustion-supporting gas used. The applicable gas and combustion-supporting gas are generally marked on the burner.

[0003] During use of the existing burner, fuel gas, coal gas and combustible gas are transported into the burner for ignition and combustion. During the combustion process, the three are mixed unevenly, resulting in incomplete combustion of the gas and the generation of a large amount of nitrogen. Utility Model Content

[0004] The main purpose of the utility model is to provide a multi-tube anti-blocking low-nitrogen burner.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A multi-tube anti-blocking low-nitrogen burner includes a combustion-supporting mechanism, a gas mechanism is installed at one end of the combustion-supporting mechanism, a connecting mechanism is installed at the other end of the combustion-supporting mechanism, a diversion mechanism is installed in the combustion-supporting mechanism, the diversion mechanism includes a swirl frame fixed in the combustion-supporting mechanism, multiple groups of auxiliary pipes are evenly installed around the swirl frame, a main pipe is fixed in the middle of the swirl frame, three groups of connecting pipes are equidistantly installed in the main pipe, and an inner pipe is installed at one end of the connecting pipe. Sealing plates are installed at one end of the main pipe and the auxiliary pipes.

[0007] Preferably, there are three groups of swirl racks, and the three groups of swirl racks are respectively located outside the secondary pipe, between the secondary pipe and the main pipe, and inside the inner pipe.

[0008] Preferably, the combustion-supporting mechanism includes a combustion-supporting air housing and a combustion-supporting air inlet, and the combustion-supporting air inlet is welded to the combustion-supporting air housing.

[0009] Preferably, the gas mechanism includes a gas casing and a gas inlet, and the gas inlet is welded to the gas casing.

[0010] Preferably, the connecting mechanism includes a burner brick, a throat and a connecting flange, and the throat is formed on the burner brick.

[0011] Preferably, a diffusion rack is installed on each group of the auxiliary pipes near the burner bricks.

[0012] Preferably, an ignition gun is installed in the middle of the combustion-supporting air housing, and air inlet pipes are symmetrically provided on both sides of the ignition gun.

[0013] The beneficial technical effects are:

[0014] By setting up a diversion mechanism, during the use of the burner, the fuel gas can be moved between the auxiliary pipe, the main pipe and the inner pipe to the throat, and the combustion-supporting gas can be moved to the throat through the outside of the auxiliary pipe and the inner pipe. At the same time, the coal gas can be moved to the throat through the air inlet pipe, so that the fuel gas, coal gas and combustion-supporting gas are evenly mixed at the throat through the swirl rack, so that the gas can be more fully mixed and the generation of nitrogen can be reduced. In addition, during the combustion process, the fuel will expand rapidly when it is ejected from the nozzle. At this time, a negative pressure area will be generated in the center, and the flue gas generated during the combustion process will be sucked back to the burner brick for secondary combustion, realizing internal circulation of the flue gas, thereby reducing the nitrogen oxides generated by the burner. At the same time, low-nitrogen combustion effect can be achieved according to technologies such as gas grading and air grading. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of a preferred embodiment of a multi-tube anti-blocking low-nitrogen burner according to the present utility model;

[0016] Figure 2 It is a main cross-sectional view of a preferred embodiment of a multi-tube anti-blocking low-nitrogen burner according to the utility model;

[0017] Figure 3 Schematic diagram of the positional relationship among the swirl frame, auxiliary pipe, sealing plate, ignition gun and air inlet pipe in a preferred embodiment of a multi-tube anti-blocking low-nitrogen burner according to the present invention;

[0018] Figure 4 The figure is a schematic diagram of the connection relationship between the main pipe, the inner pipe and the swirl frame in a preferred embodiment of a multi-tube anti-blocking low-nitrogen burner according to the present invention.

[0019] The following are the descriptions of the reference numerals:

[0020] 1. Combustion-supporting mechanism; 101. Combustion-supporting air housing; 102. Combustion-supporting air inlet; 2. Gas mechanism; 201. Gas housing; 202. Gas inlet; 3. Connecting mechanism; 301. Burner brick; 302. Throat; 303. Connecting flange; 4. Diverter mechanism; 401. Swirl rack; 402. Auxiliary pipeline; 403. Main pipeline; 404. Connecting pipe; 405. Inner pipeline; 406. Sealing plate; 5. Diffuser rack; 6. Ignition gun; 7. Inlet pipe. DETAILED DESCRIPTION

[0021] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is described in further detail below with reference to embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0022] like Figures 1-4 As shown, a multi-tube anti-blocking low-nitrogen burner provided in this embodiment includes a combustion-supporting mechanism 1, a gas mechanism 2 is installed at one end of the combustion-supporting mechanism 1, a connecting mechanism 3 is installed at the other end of the combustion-supporting mechanism 1, a diversion mechanism 4 is installed in the combustion-supporting mechanism 1, and the diversion mechanism 4 includes a swirl frame 401 fixed in the combustion-supporting mechanism 1, the swirl frame 401 is used to divert gas, and multiple groups of auxiliary pipes 402 are evenly installed around the swirl frame 401. The auxiliary pipes 402 can transport gas, and the swirl frame 401 is fixed in the middle. There is a main pipeline 403, which can transport gas. Three groups of connecting pipes 404 are installed at equal intervals in the main pipeline 403. The connecting pipes 404 are used to connect the space between the inner pipeline 405 and the main pipeline 403, and the inner pipeline 405 is installed at one end of the connecting pipe 404. The inner pipeline 405 is used to transport combustible gas. Sealing plates 406 are installed at one end of the main pipeline 403 and the auxiliary pipeline 402. The sealing plates 406 can seal the gap between the main pipeline 403 and the auxiliary pipeline 402.

[0023] like Figure 2-Figure 4 As shown, there are three groups of swirl racks 401, and the three groups of swirl racks 401 are respectively located outside the auxiliary pipe 402, between the auxiliary pipe 402 and the main pipe 403, and inside the inner pipe 405. The swirl racks 401 can divert the gas to make it mixed more evenly.

[0024] like Figure 1 As shown, the combustion-supporting mechanism 1 includes a combustion-supporting air housing 101 and a combustion-supporting air inlet 102 , and the combustion-supporting air inlet 102 is welded to the combustion-supporting air housing 101 , so that the combustion-supporting air housing 101 can be connected to an external combustion engine through the combustion-supporting air inlet 102 .

[0025] like Figure 1 As shown, the gas mechanism 2 includes a gas housing 201 and a gas inlet 202 . The gas inlet 202 is welded to the gas housing 201 , so that the gas housing 201 is connected to an external gas supply pipeline via the gas inlet 202 .

[0026] like Figure 1-Figure 2 As shown, the connecting mechanism 3 includes a burner brick 301, a throat 302 and a connecting flange 303, and the throat 302 is formed on the burner brick 301, so that the burner brick 301 can be installed on the boiler furnace wall through the connecting flange 303, and one end of the burner brick 301 is located in the boiler.

[0027] like Figure 2-Figure 4 As shown, a diffusion rack 5 is installed on each set of auxiliary pipes 402 near the burner brick 301, and the diffusion rack 5 can prevent the combustible gas from flowing back.

[0028] like Figure 1-Figure 3 As shown, an ignition gun 6 is installed in the middle of the combustion air housing 101, and air intake pipes 7 are symmetrically provided on both sides of the ignition gun 6, so that the coal gas can enter the throat 302 through the air intake pipes 7 and be ignited by the ignition gun 6.

[0029] The working principle of this device: When this device is used, the burner brick 301 is installed on the boiler wall through the connecting flange 303, and one end of the burner brick 301 is located in the boiler, and the combustion air shell 101 is connected to the external combustion engine through the combustion air inlet 102, and the gas shell 201 is connected to the external gas supply pipeline through the gas inlet 202. The gas flows through the gas shell 201 to the combustion air shell 101, at which time it is blocked by the sealing plate 406, and the gas enters the main pipeline 403 and the auxiliary pipeline 402, and is multi-stage diverted through the auxiliary pipeline 402 and the main pipeline 403, and moves to the burner brick 3 through the swirl rack 401. 01 at the throat 302, while the combustion-supporting air enters the combustion-supporting air shell 101, and passes through the outside of the auxiliary pipe 402 and the connecting pipe 404 into the inner pipe 405, and finally moves to the throat 302 in the burner brick 301 through the swirl rack 401, and the coal gas is directly transported to the throat 302 through the air inlet pipe 7. At this time, it is ignited and burned by the ignition gun 6, and during the combustion process, the fuel will expand rapidly when it is ejected from the nozzle. At this time, a negative pressure area is generated in the center, and the flue gas generated during the combustion process will be sucked back to the burner brick 301 for secondary combustion, realizing the internal circulation of the flue gas, thereby reducing the nitrogen oxides generated by the burner.

[0030] The above are only further embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention based on the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A multi-tube anti-blocking low-nitrogen burner, characterized by: The invention comprises a combustion-supporting mechanism (1), wherein a gas mechanism (2) is installed at one end of the combustion-supporting mechanism (1), a connecting mechanism (3) is installed at the other end of the combustion-supporting mechanism (1), a diversion mechanism (4) is installed in the combustion-supporting mechanism (1), and the diversion mechanism (4) comprises a swirl frame (401) fixed in the combustion-supporting mechanism (1), a plurality of groups of auxiliary pipes (402) are evenly installed around the swirl frame (401), a main pipe (403) is fixed in the middle of the swirl frame (401), three groups of connecting pipes (404) are equidistantly installed in the main pipe (403), and an inner pipe (405) is installed at one end of the connecting pipe (404), and a sealing plate (406) is installed at one end of each of the main pipe (403) and the auxiliary pipe (402).

2. The multi-tube anti-blocking low-nitrogen burner according to claim 1, characterized in that: There are three groups of swirl racks (401), and the three groups of swirl racks (401) are respectively located outside the auxiliary pipe (402), between the auxiliary pipe (402) and the main pipe (403), and inside the inner pipe (405).

3. The multi-tube anti-blocking low-nitrogen burner according to claim 2, characterized in that: The combustion-supporting mechanism (1) comprises a combustion-supporting air housing (101) and a combustion-supporting air inlet (102), and the combustion-supporting air inlet (102) is welded to the combustion-supporting air housing (101).

4. The multi-tube anti-blocking low-nitrogen burner according to claim 3, characterized in that: The gas mechanism (2) comprises a gas shell (201) and a gas inlet (202), and the gas inlet (202) is welded to the gas shell (201).

5. The multi-tube anti-blocking low-nitrogen burner according to claim 4, characterized in that: The connecting mechanism (3) comprises a burner brick (301), a throat (302) and a connecting flange (303), and the throat (302) is formed on the burner brick (301).

6. The multi-tube anti-blocking low-nitrogen burner according to claim 5, characterized in that: A diffusion rack (5) is installed on each group of the auxiliary pipes (402) near the burner brick (301).

7. The multi-tube anti-blocking low-nitrogen burner according to claim 3, characterized in that: An ignition gun (6) is installed in the middle of the combustion-supporting air housing (101), and air inlet pipes (7) are symmetrically arranged on both sides of the ignition gun (6).

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