Air inlet device of low-nitrogen combustor

Abstract

The utility model provides an air inlet device of a low-nitrogen burner, which belongs to the technical field of burners, and comprises a low-nitrogen burner main body, an air outlet, an air inlet, an air outlet, an air outlet, an air outlet, a fan and an air inlet, and is characterized in that one side of the low-nitrogen burner main body is provided with an air outlet; one end of the air inlet pipe is fixedly mounted at the air inlet of the low-nitrogen combustor main body; the filter pipe is detachably connected to the other end of the air inlet pipe; the filter plate is fixed on the circumferential inner wall of the filter pipe; the filter holes are formed in one side end of the filter plate; the plurality of conical blocks are fixed at the bottom of one side end of the filter hole; the cleaning mechanism is arranged in the filter pipe and is used for cleaning the end part of one side of the filter hole; according to the low-nitrogen combustor, large particles in the air can be effectively filtered through the filter holes in the surface of the filter plate, and when the air sucked by the fan enters the filter pipe through the air conveying pipe, the air is intercepted by the filter plate, so that the particles are not prone to entering the low-nitrogen combustor body, and the combustion efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of burners, and particularly relates to an air inlet device for a low-nitrogen burner. Background Art

[0002] A low-nitrogen burner is a device that adds a blower, an induced draft fan, an inverter, uses a control valve, and integrates multiple circuits to the traditional burner to make clean energy and the burner operation provide more efficient heat energy for the boiler. The low-nitrogen burner is an important device for industrial oil-fired boilers and gas boilers, and it ensures processes such as stable ignition and complete combustion of fuel.

[0003] The air inlet device is an important part of the low-nitrogen burner. Air is discharged into the burner through a fan for combustion. However, the existing air inlet device has a relatively simple structure and usually only uses a fan to suck in air without a filtering device. This allows larger particulate matters in the air to be sucked in by the fan and then discharged into the burner. This not only easily allows particulate matters to enter the burner, but also makes the burner prone to incomplete combustion. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an air inlet device for a low-nitrogen burner, aiming to solve the problems in the existing technology that the air inlet device has a relatively simple structure, usually only uses a fan to suck in air without a filtering device, which allows larger particulate matters in the air to be sucked in by the fan and then discharged into the burner, not only easily allowing particulate matters to enter the burner, but also making the burner prone to incomplete combustion.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An air inlet device for a low-nitrogen burner, comprising:

[0007] A low-nitrogen burner main body, with an air outlet on one side and an air inlet on the other side;

[0008] An air inlet pipe, one end of which is fixedly installed at the air inlet of the low-nitrogen burner main body;

[0009] A filter pipe, detachably connected to the other end of the air inlet pipe;

[0010] A filter plate, fixed to the circumferential inner wall of the filter pipe;

[0011] Filter holes, opened on one side end of the filter plate;

[0012] Conical blocks, there are multiple of them, all fixed to the bottom of one side end of the filter holes;

[0013] A cleaning mechanism is arranged inside the filter pipe and is used to clean one end of the filter hole.

[0014] An air delivery pipe, one end of which is sleeved on the circumferential surface of the filter pipe.

[0015] A fan is fixedly installed at the other end of the air delivery pipe.

[0016] As a preferred embodiment of the present utility model, the cleaning mechanism includes:

[0017] A rotating shaft is rotatably connected to one end of the filter plate.

[0018] A scraping strip is fixed to one side of the circumferential surface of the rotating shaft and is attached to one end of the filter plate.

[0019] Fan blades are fixed to the other side of the circumferential surface of the rotating shaft.

[0020] As a preferred embodiment of the present utility model, a bearing is sleeved on the circumferential surface of the rotating shaft, and a plurality of support rods are fixed to the circumferential surface of the bearing. The ends of the plurality of support rods are all fixed to the circumferential inner wall of the filter pipe.

[0021] As a preferred embodiment of the present utility model, the filter pipe is threadedly connected to the air inlet pipe, and a retaining ring is fixed to the circumferential inner wall of the air inlet pipe.

[0022] As a preferred embodiment of the present utility model, threaded holes are formed in the circumferential surface of the air delivery pipe and extend to the circumferential surface of the filter pipe. Bolts are threadedly connected to the threaded holes.

[0023] As a preferred embodiment of the present utility model, positioning holes are fixed to the circumferential surface of the air inlet pipe, and rotating blocks are fixed to the circumferential surface of the filter pipe.

[0024] As a preferred embodiment of the present utility model, a base is fixedly installed at the bottom of the low-nitrogen burner main body.

[0025] Compared with the prior art, the beneficial effects of the present utility model are:

[0026] 1. In the present utility model, through the provided filter plate, the filter holes on its surface can effectively filter larger particulate matters in the air. When the particulate matters are inhaled by the air from the fan and enter the filter pipe through the air delivery pipe, they are intercepted by the filter plate, making it difficult for the particulate matters to enter the low-nitrogen burner main body, and the combustion efficiency is higher.

[0027] 2. In the present utility model, through the provided cleaning mechanism, when particulate matter accumulates on the surface of the filter plate, the force generated by air circulation drives the fan blades to rotate based on the rotating shaft, and the rotating shaft drives the scraping strip to scrape on the surface of the filter plate, scraping the particulate matter to the conical block where it is adhered. At the same time, the filter pipe is conveniently detachable, facilitating the cleaning of the particulate matter on the conical block. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0029] Figure 1 is a three-dimensional view of the present utility model;

[0030] Figure 2 is a partial cross-sectional view of the present utility model;

[0031] Figure 3 is a partial exploded view of the filter pipe of the present utility model;

[0032] Figure 4 is a partial side view of the filter pipe of the present utility model.

[0033] In the figures: 1. Main body of the low-nitrogen burner; 101. Base; 102. Air outlet; 103. Air inlet; 2. Air inlet pipe; 3. Filter pipe; 4. Air delivery pipe; 5. Fan; 6. Filter plate; 7. Scraping strip; 8. Filter hole; 9. Conical block; 10. Retaining ring; 11. Rotating shaft; 12. Fan blade; 13. Bearing; 14. Support rod; 15. Threaded hole; 16. Bolt; 17. Positioning hole; 18. Rotating block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] Embodiment

[0036] Please refer to Figures 1-4 , the present utility model provides the following technical solutions:

[0037] An air inlet device for a low-nitrogen burner, comprising:

[0038] The main body 1 of the low-nitrogen burner has an air outlet 102 provided on one side and an air inlet 103 provided on the other side;

[0039] An air inlet pipe 2, one end of which is fixedly installed at the air inlet 103 on the main body 1 of the low-nitrogen burner;

[0040] A filter pipe 3, detachably connected to the other end of the air inlet pipe 2;

[0041] A filter plate 6, fixed to the circumferential inner wall of the filter pipe 3;

[0042] Filter holes 8, opened on one side end of the filter plate 6;

[0043] Conical blocks 9, there are multiple of them, all fixed to the bottom of one side end of the filter holes 8;

[0044] A cleaning mechanism, arranged inside the filter pipe 3, for cleaning one side end part of the filter holes 8;

[0045] An air delivery pipe 4, one end of which is sleeved on the circumferential surface of the filter pipe 3;

[0046] A blower 5, fixedly installed at the other end of the air delivery pipe 4.

[0047] In a specific embodiment of the present utility model, air is inhaled by the blower 5, then input into the filter pipe 3 from the air delivery pipe 4, then input into the main body 1 of the low-nitrogen burner through the air inlet pipe 2, and enters the main body 1 of the low-nitrogen burner from the air inlet 103 for combustion, and is discharged from the air outlet 102 after combustion. A base 101 is fixedly installed at the bottom of the main body 1 of the low-nitrogen burner and is supported by the base 101. When air enters the filter pipe 3, larger particulate matters in the air will also be inhaled into the filter pipe 3 by the blower 5. The air entering the filter pipe 3 will be filtered by the filter holes 8 on the filter plate 6, and the particulate matters are intercepted on the surface of the filter plate 6. The air passes through the filter holes 8 and is transmitted into the air inlet pipe 2. The filter holes 8 are located on the upper side of one side surface of the filter plate 6, and the conical blocks 9 are located on the lower side of one side surface of the filter plate 6. There is a notch at the bottom of the filter plate 6, and multiple conical blocks 9 are all located in the notch. The end of the conical block 9 is sharp, but the tip of the conical block 9 does not protrude from the surface of the filter plate 6, so that there is no protrusion on the surface of the filter plate 6. When particulate matters accumulate on the surface of the filter plate 6, it does not affect the cleaning of the surface of the filter plate 6 by the cleaning mechanism, making it difficult for particulate matters to enter the main body 1 of the low-nitrogen burner, and the combustion efficiency is higher.

[0048] Specifically, the cleaning mechanism includes:

[0049] A rotating shaft 11, rotatably connected to one side end of the filter plate 6;

[0050] A scraping strip 7, fixed to one side of the circumferential surface of the rotating shaft 11 and fitting with one side end of the filter plate 6;

[0051] Fan blades 12, fixed to the other side of the circumferential surface of the rotating shaft 11.

[0052] In this embodiment: When particulate matter accumulates on the surface of the filter plate 6, the force generated by the air flow drives the fan blade 12 to rotate based on the rotating shaft 11, and the rotating shaft 11 drives the scraping strip 7 to scrape on the surface of the filter plate 6. At this time, the particulate matter is scraped to the conical block 9. Since one side of the conical block 9 is pointed, when the particulate matter reaches the conical block 9, it is easily adhered. At the same time, since the conical block 9 does not protrude from the surface of the filter plate 6, it does not affect the rotation of the scraping strip 7 on the surface of the filter plate 6 and does not affect the cleaning of the surface of the filter plate 6.

[0053] Specifically, a bearing 13 is sleeved on the circumferential surface of the rotating shaft 11, and a plurality of support rods 14 are fixed on the circumferential surface of the bearing 13, and the ends of the plurality of support rods 14 are all fixed to the circumferential inner wall of the filter tube 3.

[0054] In this embodiment: The bearing 13 is supported by the support rod 14, and the rotating shaft 11 is rotatably connected to the bearing 13, which can further support the rotating shaft 11 and make the rotation of the rotating shaft 11 more stable.

[0055] Specifically, the filter tube 3 is threadedly connected to the air inlet pipe 2, and a retaining ring 10 is fixed on the circumferential inner wall of the air inlet pipe 2.

[0056] In this embodiment: One end of the filter tube 3 is threadedly connected to the air inlet pipe 2, and the other end is movably inserted into the air delivery pipe 4, so that the filter tube 3 can be disassembled and easily removed to facilitate the cleaning of the filter plate 6. By providing the retaining ring 10, when the filter tube 3 is threadedly connected to the air inlet pipe 2, it will not completely enter the air inlet pipe 2 and will be blocked by the filter tube 3, so that the other end of the filter tube 3 is located in the air delivery pipe 4 when the filter tube 3 is threadedly connected to the air inlet pipe 2.

[0057] Specifically, a threaded hole 15 is formed on the circumferential surface of the air delivery pipe 4, and the threaded hole 15 extends to the circumferential surface of the filter tube 3. A bolt 16 is threadedly connected in the threaded hole 15. A positioning hole 17 is fixed on the circumferential surface of the air inlet pipe 2, and a rotating block 18 is fixed on the circumferential surface of the filter tube 3.

[0058] In this embodiment: When the filter tube 3 is threadedly connected to the air inlet pipe 2, the positioning hole 17 and the rotating block 18 are aligned, and the rotating block 18 corresponds to the threaded hole 15 on the filter tube 3. When the positioning hole 17 is aligned with the rotating block 18, at the same time, the end of the filter tube 3 abuts against the retaining ring 10, and the threaded hole 15 on the filter tube 3 is aligned with the threaded hole 15 on the air delivery pipe 4. Then, the bolt 16 is threadedly connected into the threaded hole 15 to fix the filter tube 3 and the air delivery pipe 4.

[0059] It should be noted that: The low-nitrogen burner main body 1 and the fan 5 are both prior arts, and corresponding models can be selected according to actual needs. At the same time, the working principles of the low-nitrogen burner main body 1 and the fan 5 also belong to the common knowledge of those skilled in the art and do not fall within the scope of protection of the present utility model, so no further elaboration will be made here.

[0060] Working principle and usage process of the present utility model: When this device is in use, air is inhaled through the fan 5 and then input into the filter tube 3 through the air delivery pipe 4, and then input into the low-nitrogen burner main body 1 through the air inlet pipe 2, and enters the low-nitrogen burner main body 1 from the air inlet 103 for combustion, and is discharged from the air outlet 102 after combustion. When the air enters the filter tube 3, larger particulate matters in the air will also be inhaled by the fan 5 into the filter tube 3. The air entering the filter tube 3 will be filtered by the filter holes 8 on the filter plate 6, and the particulate matters are intercepted on the surface of the filter plate 6, making it difficult for the particulate matters to enter the low-nitrogen burner main body 1, and the combustion efficiency is higher.

[0061] When the particulate matters accumulate on the surface of the filter plate 6, the force generated by the air flow drives the fan blade 12 to rotate based on the rotating shaft 11, and the rotating shaft 11 drives the scraping strip 7 to scrape on the surface of the filter plate 6. At this time, the particulate matters are scraped to the conical block 9 and adhered. At the same time, since the conical block 9 does not protrude from the surface of the filter plate 6, it does not affect the rotation of the scraping strip 7 on the surface of the filter plate 6 and does not affect the cleaning of the surface of the filter plate 6.

[0062] Finally, it should be noted that: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A low nitrogen burner air inlet device, characterized in that: include: A low-nitrogen burner body (1) is provided with an air outlet (102) on one side and an air inlet (103) on the other side; An air inlet pipe (2), one end of which is fixedly mounted at the air inlet (103) on the low-nitrogen burner body (1); A filter tube (3) detachably connected to the other end of the air inlet tube (2); A filter plate (6) fixed to the circumferential inner wall of the filter tube (3); A filter hole (8) is provided at one side end of the filter plate (6); A plurality of conical blocks (9) are provided, each of which is fixed to the bottom of one side end of the filter hole (8); A cleaning mechanism is arranged in the filter tube (3) and is used to clean one end of the filter hole (8); An air delivery pipe (4), one end of which is sleeved on the circumferential surface of the filter pipe (3); The fan (5) is fixedly mounted on the other end of the air supply pipe (4).

2. A low nitrogen burner air inlet device according to claim 1, characterized in that: The cleaning mechanism comprises: A rotating shaft (11) rotatably connected to one side end of the filter plate (6); A scraper strip (7) is fixed to one side of the circumferential surface of the rotating shaft (11) and is in contact with one side end of the filter plate (6); The fan blade (12) is fixed to the other side of the circumferential surface of the rotating shaft (11).

3. A low nitrogen burner air inlet device according to claim 2, characterized in that: A bearing (13) is sleeved on the circumferential surface of the rotating shaft (11), a plurality of support rods (14) are fixed to the circumferential surface of the bearing (13), and the ends of the plurality of support rods (14) are fixed to the circumferential inner wall of the filter tube (3).

4. A low nitrogen burner air inlet device according to claim 3, characterized in that: The filter tube (3) is threadedly connected to the air inlet pipe (2), and a retaining ring (10) is fixed to the circumferential inner wall of the air inlet pipe (2).

5. A low nitrogen burner air inlet device according to claim 4, characterized in that: A threaded hole (15) is provided on the circumferential surface of the air supply pipe (4), the threaded hole (15) extends to the circumferential surface of the filter pipe (3), and a bolt (16) is connected to the inner thread of the threaded hole (15).

6. A low nitrogen burner air inlet device according to claim 5, characterized in that: A positioning hole (17) is fixed on the circumferential surface of the air inlet pipe (2), and a rotating block (18) is inherently provided on the circumferential surface of the filter pipe (3).

7. A low nitrogen burner air inlet device according to claim 6, characterized in that: A base (101) is fixedly mounted on the bottom of the low-nitrogen burner body (1).

Images