Low-nitrogen burner air supply device

Abstract

The utility model relates to a combustion equipment technical field especially is a kind of low-nitrogen combustor air supply device, including base, the upside fixed mounting of base has air supply pipe, the one end of air supply pipe is provided with wind speed adjusting assembly;The wind speed adjusting assembly includes the air pipe installation cylinder of being set to the one end of air supply pipe, in the utility model, by designing a kind of low-nitrogen combustor air supply device, utilize multiple groups of linkage fan blade structure, by reduction motor drive main shaft, through second connecting rod, first connecting rod and connecting plate linkage, drive several groups of fan blade synchronous overturning, realize the continuous, accurate adjustment of air supply pipe air outlet area, fan blade overturning angle directly determines air outlet size, can adjust air supply and wind speed in real time according to combustion load, ensure that fuel and air mixing ratio is always in optimum state, avoid the local high temperature caused by insufficient air volume or air volume too big caused by insufficient combustion or, improve combustion efficiency.

Description

Technical Field

[0001] This utility model relates to the field of combustion equipment technology, and in particular to a low-NOx burner air supply device. Background Technology

[0002] Low-NOx burners are environmentally friendly combustion devices that optimize the combustion process and control the generation of nitrogen oxides (NOx). They are widely used in industrial boilers, heating furnaces, power plant boilers, incinerators, and other thermal energy equipment. Their core objective is to minimize NOx and other pollutant emissions while ensuring complete fuel combustion and improving thermal efficiency, meeting increasingly stringent environmental regulations (such as China's "Emission Standard for Air Pollutants from Boilers" and the EU IED Directive). This is achieved by introducing fuel and air into the combustion zone in stages, controlling local oxygen concentration and combustion temperature to suppress the formation of thermal NOx (generated by the reaction of nitrogen and oxygen at high temperatures) and fuel-based NOx (generated by the oxidation of nitrogen compounds in the fuel). For example, creating an oxygen-deficient environment (lean fuel combustion) in the main combustion zone converts nitrogen in the fuel into N2 instead of NOx; supplementing air in the burnout zone ensures complete combustion; and the air supply system, as a crucial component of the low-NOx burner, directly affects combustion efficiency and pollutant control effectiveness.

[0003] Traditional air supply devices mostly use fixed duct structures or simple mechanical regulating valves, which have significant limitations: fixed ducts cannot dynamically adjust the air volume and velocity according to the combustion load, which can easily lead to incomplete combustion or local high temperature, increasing NOx generation; mechanical regulating valves (such as butterfly valves and gate valves) can adjust the air volume, but the adjustment accuracy is low, the response speed is slow, and airflow disturbances are easily generated during the adjustment process, affecting combustion stability.

[0004] To address the above issues, a low-NOx burner air supply device needs to be designed to overcome them. Utility Model Content

[0005] The main objective of this invention is to provide a low-NOx burner air supply device that can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A low-NOx burner air supply device includes a base, an air supply pipe fixedly installed on the upper side of the base, and a wind speed regulating component provided at one end of the air supply pipe. The wind speed regulating component includes a duct mounting cylinder disposed at one end of the air supply duct. A protective cylinder is fixedly installed at one end of the duct mounting cylinder. Bearings are respectively installed around the middle of the protective cylinder. A second rotating shaft is installed in the middle of the bearings. A fan blade is fixedly installed at one end of the second rotating shaft. A fixing block is fixedly installed at the other end of the second rotating shaft. A connecting plate is fixedly connected to one end of the fixing block. A first connecting rod and a second connecting rod are fixedly installed on the outer wall of the connecting plate. The first rotating shaft is fixedly installed at one end of the fan blade.

[0007] As a preferred embodiment of this utility model, the first rotating shaft, the fan blade, the second rotating shaft, the connecting plate, the first connecting rod, the fixing block, and the second connecting rod are each provided in several groups.

[0008] As a preferred embodiment of this utility model, a triangular support frame is fixedly installed around the inner wall of the protective cylinder.

[0009] As a preferred embodiment of this utility model, a circular block is fixedly installed in the middle of the triangular support frame, and the other ends of several sets of the first rotating shafts are respectively rotatably connected to the outer wall of the circular block for one revolution.

[0010] As a preferred embodiment of this utility model, an installation box is fixedly installed on one outer wall of the protective cylinder, and a geared motor is fixedly installed on one outer wall of the installation box.

[0011] As a preferred embodiment of this utility model, the output end of the geared motor is fixedly connected to the main shaft via a coupling.

[0012] As a preferred embodiment of this utility model, one end of the main rotating shaft is fixedly installed at the middle of one end of a set of fan blades.

[0013] As a preferred embodiment of this utility model, the second connecting rod is installed on the upper side of the first connecting rod, and the first connecting rod and the second connecting rod do not contact each other. An arc-shaped positioning plate is hinged to the outer wall of the base, and the arc-shaped positioning plate serves to fix the air supply pipe. Beneficial effects

[0014] Compared with the prior art, the present invention has the following beneficial effects: In this invention, a low-NOx burner air supply device is designed. Utilizing a multi-set linked fan blade structure, a geared motor drives the main shaft, which is linked with the second connecting rod, the first connecting rod, and the connecting plate to drive several sets of fan blades to rotate synchronously. This achieves continuous and accurate adjustment of the air outlet area of ​​the air supply pipe. The fan blade rotation angle directly determines the outlet size. The air supply volume and wind speed can be adjusted in real time according to the combustion load to ensure that the fuel-air mixing ratio is always at the optimal state. This avoids incomplete combustion due to insufficient air volume or localized high temperatures caused by excessive air volume, thereby improving combustion efficiency. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the base and air supply pipe of this utility model; Figure 2 This is a schematic diagram of the structure of the protective cylinder and fan blade of this utility model; Figure 3 This is a cross-sectional structural diagram of the fan blade and the circular block of this utility model.

[0016] In the diagram: 1. Base; 2. Arc-shaped positioning plate; 3. Air supply duct; 4. Wind speed adjustment component; 401. Air duct mounting cylinder; 402. Protective cylinder; 403. Circular block; 404. First rotating shaft; 405. Fan blade; 406. Second rotating shaft; 407. Connecting plate; 408. First connecting rod; 409. Mounting box; 410. Gear motor; 411. Main rotating shaft; 412. Triangular support frame; 413. Second connecting rod; 414. Bearing; 415. Fixing block. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. To make the technical means, inventive features, objectives and effects of this invention readily understood, the invention is further described below in conjunction with specific embodiments.

[0020] like Figure 1-3 As shown, a low-NOx burner air supply device includes a base 1, an air supply pipe 3 is fixedly installed on the upper side of the base 1, and a wind speed adjustment component 4 is provided at one end of the air supply pipe 3. The wind speed regulating component 4 includes a duct mounting cylinder 401 disposed at one end of the air supply duct 3. A protective cylinder 402 is fixedly installed at one end of the duct mounting cylinder 401. Bearings 414 are respectively installed around the middle of the protective cylinder 402. A second rotating shaft 406 is installed in the middle of the bearings 414. A fan blade 405 is fixedly installed at one end of the second rotating shaft 406. A fixing block 415 is fixedly installed at the other end of the second rotating shaft 406. A connecting plate 407 is fixedly connected to one end of the fixing block 415. A first connecting rod 408 and a second connecting rod 413 are fixedly installed on the outer wall of the connecting plate 407. A first rotating shaft 404 is fixedly installed at one end of the fan blade 405.

[0021] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, the first rotating shaft 404, fan blade 405, second rotating shaft 406, connecting plate 407, first connecting rod 408, fixing block 415, and second connecting rod 413 are arranged in several groups. A triangular support frame 412 is fixedly installed around the inner wall of the protective cylinder 402. A circular block 403 is fixedly installed in the middle of the triangular support frame 412. The other ends of the several groups of first rotating shafts 404 are rotatably connected to the outer wall of the circular block 403. A mounting plate 407 is fixedly installed on one side of the outer wall of the protective cylinder 402. The box 409 is mounted on one side of the outer wall of the mounting box 409. The output end of the geared motor 410 is fixedly connected to the main shaft 411 through a coupling. One end of the main shaft 411 is fixedly mounted on the middle of one end of a set of fan blades 405. The second connecting rod 413 is mounted on the upper side of the first connecting rod 408, and the first connecting rod 408 and the second connecting rod 413 do not contact each other. The outer wall of the base 1 is hinged with an arc-shaped positioning plate 2, which serves to fix the air supply pipe 3. Among them, the bottom of the circular block 403 is installed on the inner wall of the protective cylinder 402 through the triangular support frame 412, so as to provide support for the fan blade 405. Among them, the fan blades 405 are distributed circumferentially along the inner wall of the protective cylinder 402, and are rotatably connected to the circular block 403 through the first rotating shaft 404 and the second rotating shaft 406 cooperates with the bearing 414 to form a multi-point supported rotating structure. When the fan blades 405 are flipped, they not only change the air outlet area, but also adjust the airflow direction to achieve circumferential uniform distribution and dynamic mixing of airflow, avoiding the "airflow dead angle" or "flow deviation" phenomenon commonly found in traditional fixed air ducts, ensuring uniform distribution of temperature field and concentration field in combustion chamber, and improving combustion stability and thermal efficiency. The protective cylinder 402 has a triangular support frame 412 on its inner wall and a fixed circular block 403 in the middle, which provides stable rotational support for the fan blade 405 and avoids vibration or deformation caused by high-speed airflow.

[0022] The working process of this utility model is as follows: Using the low-NOx burner air supply device designed in this scheme, during operation, the air supply pipe 3 is installed on the upper side of the base 1, and then installed in the burner's pre-positioned position. When adjustment of the air outlet of the air supply pipe 3 is required, the external controller controls the reduction motor 410 to operate. The reduction motor 410 drives the main rotating shaft 411 to rotate. The rotation of the main rotating shaft 411, through the second connecting rod 413, the first connecting rod 408, and the connecting plate 407, sequentially drives the second rotating shaft 406 to rotate. 406 and the main rotating shaft 411 respectively drive the corresponding fan blades 405 to rotate around the outer wall of the circular block 403 via the first rotating shaft 404 at one end of the fan blades 405. This facilitates the rotation of the fan blades 405. The degree of rotation determines the size of the air outlet of the air supply pipe 3. The air supply volume and wind speed can be adjusted in real time according to the combustion load to ensure that the fuel and air mixing ratio is always in the optimal state. This avoids incomplete combustion caused by insufficient air volume or local high temperature caused by excessive air volume, which helps to improve combustion efficiency and makes it easier for people to operate and use.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-NOx burner air supply device, comprising a base (1), characterized in that: An air supply pipe (3) is fixedly installed on the upper side of the base (1), and a wind speed adjustment component (4) is provided at one end of the air supply pipe (3). The wind speed regulating component (4) includes a duct mounting cylinder (401) disposed at one end of the air supply duct (3). A protective cylinder (402) is fixedly installed at one end of the duct mounting cylinder (401). A bearing (414) is installed around the middle of the protective cylinder (402). A second rotating shaft (406) is installed in the middle of the bearing (414). A fan blade (405) is fixedly installed at one end of the second rotating shaft (406). A fixing block (415) is fixedly installed at the other end of the second rotating shaft (406). A connecting plate (407) is fixedly connected to one end of the fixing block (415). A first connecting rod (408) and a second connecting rod (413) are fixedly installed on the outer wall of the connecting plate (407). A first rotating shaft (404) is fixedly installed at one end of the fan blade (405).

2. The low-NOx burner air supply device according to claim 1, characterized in that: The first rotating shaft (404), fan blade (405), second rotating shaft (406), connecting plate (407), first connecting rod (408), fixing block (415) and second connecting rod (413) are respectively set in several groups.

3. The low-NOx burner air supply device according to claim 2, characterized in that: A triangular support frame (412) is fixedly installed around the inner wall of the protective cylinder (402).

4. The low-NOx burner air supply device according to claim 3, characterized in that: A circular block (403) is fixedly installed in the middle of the triangular support frame (412), and the other ends of several sets of the first rotating shafts (404) are respectively rotatably connected to the outer wall of the circular block (403) for one revolution.

5. The low-NOx burner air supply device according to claim 4, characterized in that: A mounting box (409) is fixedly installed on one side of the outer wall of the protective cylinder (402), and a geared motor (410) is fixedly installed on one side of the outer wall of the mounting box (409).

6. The low-NOx burner air supply device according to claim 5, characterized in that: The output end of the geared motor (410) is fixedly connected to the main shaft (411) via a coupling.

7. The low-NOx burner air supply device according to claim 6, characterized in that: One end of the main shaft (411) is fixedly installed at the middle of one end of a set of fan blades (405).

8. The low-NOx burner air supply device according to claim 7, characterized in that: The second connecting rod (413) is installed on the upper side of the first connecting rod (408), and the first connecting rod (408) and the second connecting rod (413) do not contact each other. The outer wall of the base (1) is hinged with an arc-shaped positioning plate (2), which serves to fix the air supply pipe (3).

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