Normal open fire igniter for stabilizing flame of large combustor

Abstract

The utility model discloses a normal open fire igniter for stabilizing flame of a large-scale burner, which comprises a carbon steel pipe, a connecting pipe is arranged in the carbon steel pipe, a rotational flow head is fixedly arranged on one side of the surface of the connecting pipe, a plurality of rotational flow grooves are arranged on the periphery of the rotational flow head in a circumferential array shape, and the rotational flow grooves are communicated with the connecting pipe. A swirl groove is formed in the carbon steel pipe, the swirl groove is matched with the swirl head to enable airflow in the carbon steel pipe to move and mix in a spiral shape, a flange plate is arranged on one side of the carbon steel pipe, and one side of the connecting pipe penetrates through the flange plate and extends to the outside of the flange plate. Two gases injected into the pipe body can be fully mixed by the rotational flow head, the two gases can be mutually fused and mixed together by means of the mixing means that the two gases are discharged into the pipe body and can automatically rotate and deflect when passing through the rotational flow groove, then the electrode tip is matched for ignition treatment, and ignited flames can be sprayed out from the outlet.

Description

Technical Field

[0001] The utility model relates to the technical field of long - light igniters, in particular to a pilot - light igniter for stabilizing the flame of a large - scale burner. Background Technique

[0002] In the patent application with the publication number CN216079915U, it includes an air - fuel mixing pipe for realizing the mixing of air and gas and a combustion zone arranged at the outlet end of the air - fuel mixing pipe. An ignition needle for ignition is arranged beside the combustion zone. It is characterized in that: the combustion zone includes an ignition zone directly communicating with the main - fire combustion chamber and a constant - combustion zone for performing a standby ignition function. Both the ignition zone and the constant - combustion zone are connected to the air - fuel mixing pipe through a branch pipeline; a screen layer is arranged in the constant - combustion zone on the air flow path, and the screen layer is arranged adjacent to the fire outlet of the ignition zone. The advantages are as follows: Abandoning the traditional single - ignition structure, the utility model ingeniously provides a double - insurance structure, that is, a standby ignition component with a screen layer is arranged beside the single ignition, so as to always ensure that the pilot - light of the stove is in a normal and stable combustion state. Especially the design of the screen layer enables the flame at the constant - combustion zone to always form a slow and constant internal - flame combustion in the screen holes of the screen layer and in the cavity of the constant - combustion zone. Its ability to resist sudden changes in external pressure shock is obviously stronger than that of the "bare" ignition zone, thus ensuring its constant - combustion property.

[0003] In the prior art including the above - mentioned patent, large - scale ultra - low - nitrogen burners generally adopt gas - zoning technology to reduce local high - temperature zones for low - nitrogen effects. However, if the gas - zoning distance is far or for other reasons, there may be a situation where the main igniter fails to ignite the gas zone of the partition after ignition. Excessive accumulation of gas will result in deflagration and detonation risks, and in severe cases, the furnace will explode. The ignition design adopted in the above - mentioned patent lacks a mixing structure, resulting in insufficient gas combustion and weak flame rigidity. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pilot - light igniter for stabilizing the flame of a large - scale burner, so as to solve the problem that there is a lack of gas - mixing equipment between the gas and air in the pilot - light igniter mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A pilot - light igniter for stabilizing the flame of a large - scale burner, including a carbon steel pipe. A connecting pipe is arranged inside the carbon steel pipe. A swirler is fixedly arranged on one side of the surface of the connecting pipe. A plurality of swirl grooves are circumferentially arranged around the swirler. The swirl grooves cooperate with the swirler to make the air flow inside the carbon steel pipe move and mix in a spiral shape.

[0006] Further, one side of the carbon steel pipe is provided with a flange plate, and one side of the connecting pipe penetrates through the flange plate and extends to the outside of the flange plate.

[0007] Further, one side of the connecting pipe is provided with an electrode access end, and one side of the electrode access end is provided with an ignition electrode.

[0008] Further, one side of the ignition electrode penetrates through the connecting pipe and extends to the outside of the connecting pipe, and one side of the ignition electrode is provided with an electrode head.

[0009] Further, one side of the bottom of the carbon steel pipe is fixedly communicated with a natural gas inlet, and the bottom of the carbon steel pipe is also fixedly communicated with a combustion-supporting air inlet.

[0010] Further, one side of the carbon steel pipe is provided with a stainless steel pipe, and the other side of the stainless steel pipe is conical.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The pilot igniter for stabilizing the flame of a large burner is reasonable and has the following advantages:

[0012] A swirl head is provided inside the carbon steel pipe. The swirl head can enable the natural gas and combustion-supporting air injected into the pipe body to be fully mixed. The mixing method utilizes the discharge of the two, and they will automatically rotate when passing through the swirl groove, and the deflection direction enables the two gases to blend and mix with each other. Then, with the electrode head for ignition treatment, the ignited flame can be ejected from the outlet. Several of such pilot igniters can be arranged in the gas distribution area of the burner. After the burner starts running, it remains constantly burning, ensuring that the gas in each area can be smoothly ignited after the burner changes the flame, and ensuring stable combustion and safe operation.

[0013] One side of the carbon steel pipe is provided with a stainless steel pipe, and the tail of the stainless steel pipe is set in a conical constriction shape. The conical constriction of the gas outlet can enhance the flame rigidity and lengthen the flame length. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the carbon steel pipe of the present utility model;

[0016] Figure 3 It is a schematic diagram of the connecting pipe structure of the present utility model;

[0017] Figure 4 It is a front view schematic diagram of the swirl head structure of the present utility model;

[0018] Figure 5 It is a schematic diagram of the swirl groove structure of the present utility model;

[0019] Figure 6 This is the right view schematic diagram of the stainless steel pipe structure of the present utility model.

[0020] In the figure: 1. Stainless steel pipe; 2. Carbon steel pipe; 3. Flange; 4. Electrode access terminal; 5. Electrode head; 6. Swirl head; 7. Combustion-supporting air inlet; 8. Natural gas inlet; 9. Ignition electrode; 10. Connecting pipe; 11. Swirl groove. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figure 1-6 , a technical solution provided by the present utility model:

[0023] In this embodiment, a pilot igniter for stabilizing the flame of a large burner includes a carbon steel pipe 2. A connecting pipe 10 is arranged inside the carbon steel pipe 2. One side of the surface of the connecting pipe 10 is fixedly provided with a swirl head 6. A plurality of swirl grooves 11 are arranged around the swirl head 6 in a circumferential array. The swirl grooves 11 cooperate with the swirl head 6 to make the airflow inside the carbon steel pipe 2 move and mix in a spiral shape.

[0024] In this embodiment, a flange 3 is arranged on one side of the carbon steel pipe 2. One side of the connecting pipe 10 penetrates through the flange 3 and extends to the outside of the flange 3.

[0025] In this embodiment, an electrode access terminal 4 is arranged on one side of the connecting pipe 10, and an ignition electrode 9 is arranged on one side of the electrode access terminal 4.

[0026] In this embodiment, one side of the ignition electrode 9 penetrates through the connecting pipe 10 and extends to the outside of the connecting pipe 10, and an electrode head 5 is arranged on one side of the ignition electrode 9.

[0027] In this embodiment, a natural gas inlet 8 is fixedly communicated with one side of the bottom of the carbon steel pipe 2, and a combustion-supporting air inlet 7 is also fixedly communicated with the bottom of the carbon steel pipe 2.

[0028] In this embodiment, a stainless steel pipe 1 is arranged on one side of the carbon steel pipe 2, and the other side of the stainless steel pipe 1 is conical.

[0029] Working principle: During use, first rotate and tightly screw the natural gas pipeline and the combustion-supporting air pipeline into the natural gas inlet 8 and the combustion-supporting air inlet 7 at the bottom of the carbon steel pipe 2. After connection, discharge the natural gas and the combustion-supporting air into the carbon steel pipe 2. The fuel gas and the combustion-supporting air enter the carbon steel pipe 2 at a ratio of approximately 1:11. After being discharged, the two gas streams will pass through the swirl head 6. The swirl grooves 11 formed on the swirl head 6 will control the two straight-moving gas streams to intertwine with each other in a spiral shape to achieve a mixing effect. The mixed gas will enter the stainless steel pipe 1. At this time, start the ignition electrode 9 through the electrode access end 4. The electrode head 5 on the ignition electrode 9 will ignite the intertwined gas to form a flame. The tail of the stainless steel pipe 1 is in a tapered constricted shape, and the ejected flame will be more rigid and the flame spraying distance will be longer.

[0030] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A constant-fire igniter for stabilizing the flame of a large burner, comprising a carbon steel pipe (2), characterized in that: A connecting pipe (10) is provided inside the carbon steel pipe (2), a swirl head (6) is fixedly provided on one side of the surface of the connecting pipe (10), a plurality of swirl grooves (11) are provided in a circular array around the swirl head (6), and the swirl grooves (11) cooperate with the swirl head (6) to allow the airflow inside the carbon steel pipe (2) to move and mix in a spiral shape.

2. A constant-fire igniter for stabilizing the flame of a large burner according to claim 1, characterized in that: A flange (3) is provided on one side of the carbon steel pipe (2), and one side of the connecting pipe (10) passes through the flange (3) and extends to the outside of the flange (3).

3. The constant-fire igniter for stabilizing the flame of a large burner according to claim 1, characterized in that: An electrode access end (4) is provided on one side of the connecting tube (10), and an ignition electrode (9) is provided on one side of the electrode access end (4).

4. A constant-fire igniter for stabilizing the flame of a large burner according to claim 3, characterized in that: One side of the ignition electrode (9) passes through the connecting tube (10) and extends to the outside of the connecting tube (10), and one side of the ignition electrode (9) is provided with an electrode head (5).

5. The constant-fire igniter for stabilizing the flame of a large burner according to claim 1, characterized in that: One side of the bottom of the carbon steel pipe (2) is fixedly connected to a natural gas inlet (8), and the bottom of the carbon steel pipe (2) is also fixedly connected to a combustion-supporting air inlet (7).

6. The constant-fire igniter for stabilizing the flame of a large burner according to claim 1, characterized in that: A stainless steel pipe (1) is provided on one side of the carbon steel pipe (2), and the other side of the stainless steel pipe (1) is in a conical shape.

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