CN220355412U

CN220355412U - Low-nitrogen burner

Info

Publication number: CN220355412U
Application number: CN202321841115.4U
Authority: CN
Inventors: 武力勇
Original assignee: Hebei Zhongxu General Equipment Co ltd
Current assignee: Hebei Zhongxu General Equipment Co ltd
Priority date: 2023-07-13
Filing date: 2023-07-13
Publication date: 2024-01-16
Anticipated expiration: 2033-07-13

Abstract

The utility model discloses a low-nitrogen burner, which comprises a combustion device and a blowing device; the periphery of the combustion device is provided with a ventilation pipeline, and one side of the ventilation pipeline is connected with an air outlet of the air blowing device; the other side of the ventilating duct is connected with a fixing piece, an internal circulation air duct is arranged on the fixing piece, and the ventilating duct and the internal circulation air duct are oppositely arranged to form a smoke circulation port; the combustion device comprises a flame stabilizing cylinder, a gas nozzle, a gas circular ring, a spray pipeline and a multi-stage nozzle; the flame stabilizing cylinder is arranged in the middle of the internal circulation air cylinder, and the gas nozzle penetrates through the middle of the flame stabilizing cylinder; the gas ring is arranged on one side of the ventilation pipeline, which is close to the air blowing device, and one side of the gas ring is uniformly connected with a plurality of injection pipelines; the injection pipeline penetrates through the fixing piece and is connected with the multi-stage spray head, and the multi-stage spray head is directly inserted into the internal circulation air duct. The low-nitrogen burner solves the problem that the existing low-nitrogen burner generates excessive nitrogen oxides in the heating process.

Description

Low-nitrogen burner

Technical Field

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

Background

The low-nitrogen burner is an important part burner in a boiler combustion system, and has the functions of ensuring stable ignition, combustion, burnout and the like of fuel. With the increasing level of living, more and more factors are considered when we use the burner. Not only is the low price and the safety and effectiveness considered, but also the environmental protection is considered.

In order to reduce the emission of nitrogen oxides better, a smoke internal circulation low-nitrogen burner appears in the market, the smoke generated by combustion returns to the burner in the hearth to be in reference with combustion, an external circulation pipeline is not needed, space and cost are saved, but flame sprayed by a spray head of the smoke internal circulation low-nitrogen burner in the market has too high flame temperature, so that nitrogen oxides are generated excessively in a combustion link, and in order to solve the problem, the applicant proposes to make further improvement on the low-nitrogen burner.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a low-nitrogen burner aiming at the defects in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a low nitrogen burner, comprising a combustion device and a blowing device;

the periphery of the combustion device is provided with a ventilation pipeline, and one side of the ventilation pipeline is connected to an air outlet of the air blowing device;

the other side of the ventilating duct is connected with a fixing piece, an internal circulation air duct is arranged on the fixing piece, and the ventilating duct and the internal circulation air duct are oppositely arranged to form a smoke circulation port;

the combustion device comprises a flame stabilizing cylinder, a gas nozzle, a gas circular ring, a spray pipeline and a multi-stage nozzle;

the flame stabilizing cylinder is arranged in the middle of the internal circulation air cylinder, and the gas nozzle penetrates through the middle of the flame stabilizing cylinder;

the gas circular ring is arranged at one side of the ventilation pipeline, which is close to the air blowing device, and one side of the gas circular ring is uniformly connected with a plurality of injection pipelines; the injection pipeline penetrates through the fixing piece and is connected with the multi-stage spray head, and the multi-stage spray head is directly inserted into the internal circulation air duct.

Preferably, the vent pipe is provided with an opening, the gas nozzle is connected with a first gas pipe, and the first gas pipe extends out of the opening to be externally connected with gas.

Preferably, the bottom of the smoke ring is connected with a second gas pipeline, the second gas pipeline is connected with a gas servo motor, and one side of the gas servo motor is also provided with a gas valve.

Preferably, the air blowing device comprises an air inlet box, an air disc, an air door servo motor, a motor and an impeller, wherein the air inlet box is arranged on one side of the air disc, and the air door servo motor is arranged on the upper side of the air inlet box; the motor is arranged on the other side of the wind disc, and an impeller connected with the output end of the motor is arranged in the wind disc.

Preferably, a mounting plate is arranged in the middle of the ventilation pipeline.

Preferably, a controller is further installed on one side of the blower device.

The utility model has the beneficial effects that:

the utility model provides a low-nitrogen burner which is simple in structure and reasonable in design, wherein a jet pipeline is connected with a multi-stage nozzle, and flames jetted by the multi-stage nozzle are layered flames. Solves the problem that the flame at the nozzle of the low-nitrogen burner burns at high temperature to generate excessive nitrogen oxides in the prior art.

Drawings

For ease of illustration, the utility model is described in detail by the following detailed description and the accompanying drawings.

Fig. 1 is a schematic structural diagram of a low-nitrogen burner according to the present embodiment;

FIG. 2 is a schematic view of another angle of the low nitrogen burner according to the present embodiment;

FIG. 3 is an enlarged view of the front end of the low nitrogen burner provided in this embodiment;

fig. 4 is a schematic structural diagram of a combustion device of a low-nitrogen combustor according to the present embodiment;

fig. 5 is a schematic diagram of the internal structure of a blower device of a low-nitrogen burner according to the present embodiment.

In the figure:

a 100-combustion device; 110-flame stabilizing cylinder; 120-gas nozzle; 130-a gas ring;

140-spraying pipeline; 150-a multi-stage spray head;

200-air blowing device; 210-an air inlet box; 220-wind disc; 230-an air door servo motor;

240-motor; 250-impeller;

300-ventilation duct; 310-opening holes; 320-mounting plates;

400-fixing piece; 500-internal circulation wind cylinders; 600-flue gas circulation port; 700-a first gas pipeline; 800-a second gas pipeline; 810-a gas servo motor; 820-gas valve; 900-controller.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments; in the following description, specific details such as specific configurations and devices are provided merely to facilitate a thorough understanding of embodiments of the utility model. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the utility model. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

A low nitrogen burner according to the present embodiment is shown in fig. 1 to 5, and is characterized by comprising a combustion device 100 and a blower device 200; the periphery of the combustion device 100 is provided with a ventilation pipeline 300, and one side of the ventilation pipeline 300 is connected with an air outlet of the air blowing device 200; the other side of the ventilating duct 300 is connected with a fixing piece 400, an internal circulation air duct 500 is arranged on the fixing piece 400, and the ventilating duct 300 and the internal circulation air duct 500 are oppositely arranged to form a smoke circulation port 600; the combustion apparatus 100 includes a flame stabilizing cylinder 110, a gas nozzle 120, a gas ring 130, an injection pipe 140, and a multi-stage nozzle 150; the flame stabilizing cylinder 110 is arranged in the middle of the internal circulation air cylinder 500, and the gas nozzle 120 penetrates through the middle of the flame stabilizing cylinder 110; the gas circular ring 130 is arranged at one side of the ventilation pipeline 300 close to the blower device 200, and one side of the gas circular ring 130 is uniformly connected with a plurality of injection pipelines 140; the injection pipe 140 penetrates through the fixing piece 400 and is connected to the multi-stage nozzle 150, and the multi-stage nozzle 150 is directly inserted into the internal circulation air duct 500.

Specifically, the blower 200 is connected to the ventilation duct 300 to supply air necessary for combustion to the low-nitrogen burner, and the inner circulation duct 500 is installed at one side of the fixing member 400 and forms a smoke circulation port 600 with the ventilation duct 300; under the action of the air blowing device 200, air can quickly flow out of the ventilating duct 300, a negative pressure area is formed at the periphery of the fixing piece 400, and smoke generated by combustion enters the internal circulation air duct 500 through the smoke circulation port 600 to participate in combustion, so that the emission of nitrogen oxides is reduced; the injection pipe 140 is connected to the multi-stage nozzle 150, so that a stratified flame can be formed at the nozzle of the multi-stage nozzle 150, the temperature of the combustion flame can be reduced, and the formation of nitrogen oxides can be reduced in the combustion process.

Further, the ventilation pipe 300 is provided with an opening 310, the gas nozzle 120 is connected with a first gas pipe 700, and the first gas pipe 700 extends out of the opening 310 to be externally connected with gas.

Specifically, the first gas pipe 700 is externally connected with gas, and the gas reaches the gas nozzle 120 through the first gas pipe 700, so as to generate a central flame.

Further, the bottom of the smoke ring is connected with a second gas pipeline 800, the second gas pipeline 800 is connected with a gas servo motor 810, and one side of the gas servo motor 810 is also provided with a gas valve 820.

Specifically, the gas valve 820 is used to control the opening and closing of the second gas pipe 800, the gas servo motor 810 is used to control the gas inflow, and the gas enters the gas ring 130 through the second gas pipe 800, then enters the injection pipe 140 connected with the gas ring 130, and finally enters the multi-stage nozzle 150.

Further, the blower device 200 includes an air inlet box 210, an air tray 220, an air door servo motor 230, a motor 240 and an impeller 250, wherein the air inlet box 210 is arranged at one side of the air tray 220, and the air door servo motor 230 is arranged at the upper side of the air inlet box 210; the motor 240 is arranged on the other side of the wind disc 220, and an impeller 250 connected with the output end of the motor 240 is arranged in the wind disc 220.

Specifically, air enters the air pan 220 from the air inlet box 210, and the air door servo motor 230 is used for controlling the air inlet amount; the motor 240 rotates the impeller 250, and thus, air is fed into the ventilation duct 300.

Further, a mounting plate 320 is provided at the middle of the ventilation duct 300.

Specifically, the low nitrogen burner is fixed to the boiler side by mounting bolts on the mounting plate 320.

Further, a controller 900 is installed on one side of the blower 200.

Specifically, the controller 900 is configured to control the low nitrogen burner.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, means, and/or combinations thereof.

In the description of the present application, it should be understood that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the present application. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. A low nitrogen burner, characterized by comprising a combustion device (100) and a blowing device (200);

the periphery of the combustion device (100) is provided with a ventilation pipeline (300), and one side of the ventilation pipeline (300) is connected to an air outlet of the air blowing device (200);

the other side of the ventilation pipeline (300) is connected with a fixing piece (400), an internal circulation air duct (500) is arranged on the fixing piece (400), and the ventilation pipeline (300) and the internal circulation air duct (500) are oppositely arranged to form a smoke circulation port (600);

the combustion device (100) comprises a flame stabilizing cylinder (110), a gas spray head (120), a gas circular ring (130), a spray pipeline (140) and a multi-stage spray head (150);

the flame stabilizing cylinder (110) is arranged in the middle of the internal circulation air cylinder (500), and the gas nozzle (120) penetrates through the middle of the flame stabilizing cylinder (110);

the gas circular ring (130) is arranged at one side, close to the air blowing device (200), in the ventilating duct (300), and one side of the gas circular ring (130) is uniformly connected with a plurality of injection ducts (140); the injection pipeline (140) penetrates through the fixing piece (400) and is connected to the multi-stage spray head (150), and the multi-stage spray head (150) is directly inserted into the internal circulation air duct (500).

2. The low-nitrogen burner according to claim 1, wherein the ventilation duct (300) is provided with an opening (310), the gas nozzle (120) is connected with a first gas duct (700), and the first gas duct (700) extends out of the opening (310) to be externally connected with gas.

3. The low-nitrogen burner according to claim 1, wherein a second gas pipeline (800) is connected to the bottom of the gas ring (130), the second gas pipeline (800) is connected to a gas servo motor (810), and a gas valve (820) is further arranged on one side of the gas servo motor (810).

4. The low-nitrogen burner according to claim 1, wherein the blower device (200) comprises an air inlet box (210), an air disc (220), an air door servo motor (230), a motor (240) and an impeller (250), the air inlet box (210) is arranged at one side of the air disc (220), and the air door servo motor (230) is arranged at the upper side of the air inlet box (210); the motor (240) is arranged on the other side of the air disc (220), and an impeller (250) connected with the output end of the motor (240) is arranged in the air disc (220).

5. A low nitrogen burner according to claim 1, characterized in that the ventilation duct (300) is provided with a mounting plate (320) in the middle.

6. A low nitrogen burner according to claim 1, characterized in that a controller (900) is also mounted on one side of the blower device (200).