Low-nitrogen burner for boiler

Abstract

The utility model discloses a low-nitrogen burner for a boiler, which comprises a fan, a flue gas collecting pipe is fixed on an air outlet of the fan, a burning head is fixed in the flue gas collecting pipe, a feeding pipe is fixed on the lower side of the air outlet of the fan, an air suction port of the fan is provided with an air suction hood, and the air suction hood is provided with an air outlet. A return pipe is mounted between the suction hood and the flue gas collecting pipe, and a dust removal box is fixed on the return pipe. The flue gas purification device has the beneficial effects that the electrostatic generator and the dust collection plate are arranged, so that the electrostatic generator can enable the dust collection plate to generate a high-voltage electric field in the flue gas backflow process, impurities in flowing flue gas are adsorbed and separated from the flue gas, the impurities in the flue gas can be removed in an electrostatic dust collection mode, and the flue gas purification effect is improved. While impurity removal is kept, the backflow rate and the reutilization rate of air flow can be ensured, and the using effect of the device is improved.

Description

Technical Field

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

[0002] A low-nitrogen burner is a device that adds a blower, induced draft fan, inverter, control valve and multiple circuits to a traditional burner to allow clean energy and burner operation to provide more efficient heat energy for the boiler.

[0003] Patent No. CN202322252590.4 discloses a high-efficiency low-nitrogen burner, which includes: a base, the upper end of the base is fixedly connected to a combustion module, the outer surface of the combustion module is fixedly connected to a blow pump, the upper end of the combustion module is fixedly connected to a smoke exhaust pipe, the upper end of the smoke exhaust pipe is fixedly connected to a filter box, the outer surface of the filter box is fixedly connected to a conveying pipe, one end of the conveying pipe is fixedly connected to an air suction pump, and the lower end of the air suction pump is fixedly connected to a feeding module.

[0004] Although the above patent improves the fuel utilization rate by adding a combustion module, a smoke exhaust pipe, a filter box, a suction pump and a feed module to enable the smoke exhausted after combustion to be re-burned, but in the actual reflux process, the performance of the filter box will decrease with the increase of the filtration time, and will also affect the rate of smoke reflux, thereby affecting its reuse effect, resulting in poor use effect. Therefore, a low-nitrogen burner for boilers is urgently needed to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The technical problem to be solved by the utility model is aimed at the current status of the prior art, and now provides a low-nitrogen burner for boilers which can remove impurities in flue gas by means of electrostatic dust removal, while maintaining the impurity removal and ensuring the airflow reflux rate and recycling rate.

[0007] (II) Technical solution

[0008] The utility model is achieved through the following technical scheme: the utility model proposes a low-nitrogen burner for a boiler, comprising a fan, a flue gas collecting pipe is fixed on the air outlet of the fan, a combustion head is fixed in the flue gas collecting pipe, a feed pipe is fixed on the lower side of the fan air outlet, an air suction hood is installed on the air suction port of the fan, a return pipe is installed between the air suction hood and the flue gas collecting pipe, a dust removal box is fixed on the return pipe, an electrostatic generator is installed on the top of the dust removal box, dust collecting plates are fixed on both side walls of the dust removal box, an ash discharge pipe is fixed at the bottom end of the dust removal box, a baffle is movably installed in the ash discharge pipe, an electric push rod is connected to one side wall of the baffle, and a bracket is installed on the fixed part of the electric push rod.

[0009] Furthermore, the flue gas collecting pipe is connected to the air outlet of the fan via a flange, the burner head is fixed inside the flue gas collecting pipe, and the feed pipe is welded to the air outlet of the fan.

[0010] By adopting the above technical solution, the feed pipe can provide fuel gas to the burner head, and the fan can provide air to the burner head. The two are mixed and burned in the burner head, and the smoke generated by the combustion enters the smoke collecting pipe.

[0011] Furthermore, the air suction hood is connected to the air suction port of the fan via screws, and the return pipe is fixedly connected to the air suction hood and the smoke collecting pipe.

[0012] By adopting the above technical solution, the fan can absorb the sighing air through the air suction hood and the return pipe, so that the sighing air is blown back into the combustion head for combustion.

[0013] Furthermore, the dust removal box is fixed to the return pipe by bolts, and the dust removal box is a rectangular parallelepiped structure.

[0014] By adopting the above technical solution, during the reflow process, the dust removal mechanism in the dust removal box can remove dust from the flue gas.

[0015] Furthermore, the electrostatic generator is fixed to the dust removal box by screws, the dust collecting plate is fixed to the inner side walls of the dust removal box by screws, and the electrostatic generator is electrically connected to the dust collecting plate.

[0016] By adopting the above technical solution, the electrostatic generator can enable the dust collecting plate to generate a high-voltage electric field, thereby adsorbing impurities in the flowing flue gas and separating them from the flue gas. The impurities in the flue gas can be removed by electrostatic dust removal. While maintaining impurity removal, the airflow reflow rate and reuse rate can also be guaranteed, thereby improving the use effect of the device.

[0017] Furthermore, the ash discharge pipe is fixed at the bottom end of the dust removal box, and the baffle is slidably connected to the ash discharge pipe.

[0018] By adopting the above technical solution, when the device is used up, the device is closed, and the impurities on the dust collecting plate are discharged through the ash discharge pipe by their own gravity, and the baffle controls the on and off of the ash discharge pipe.

[0019] Furthermore, the movable end of the electric push rod is connected to the baffle by screws, the fixed part of the electric push rod is connected to the bracket by bolts, the other end of the bracket is welded to the outer wall of the ash discharge pipe, and the bracket is an L-shaped structure.

[0020] By adopting the above technical solution, the electric push rod can drive the baffle to move, thereby realizing the opening and closing of the ash discharge pipe.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] In order to solve the problem that in the existing low-nitrogen burner for boilers, the performance of the filter box decreases with the increase of filtration time during the flue gas reflow process, and it also affects the flue gas reflow rate, thereby affecting its recycling effect and causing poor use effect, the utility model arranges an electrostatic generator and a dust collecting plate. During the flue gas reflow process, the electrostatic generator can make the dust collecting plate generate a high-voltage electric field, thereby adsorbing impurities in the flowing flue gas and separating it from the flue gas. Impurities in the flue gas can be removed by electrostatic dust removal. While maintaining impurity removal, the airflow reflow rate and recycling rate can be guaranteed, thereby improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a low-nitrogen burner for a boiler described in the utility model;

[0025] Figure 2 This is a back view of a low-nitrogen burner for a boiler according to the utility model;

[0026] Figure 3 It is a top sectional view of a dust removal box in a low-nitrogen burner for a boiler described in the utility model.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Fan; 2. Dust removal box; 3. Electrostatic generator; 4. Return pipe; 5. Flue gas collecting pipe; 6. Burner head; 7. Feed pipe; 8. Electric push rod; 9. Baffle; 10. Bracket; 11. Ash discharge pipe; 12. Suction hood; 13. Dust collecting plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] like Figure 1-Figure 3As shown, a low-nitrogen burner for a boiler in this embodiment includes a fan 1, a flue gas collecting pipe 5 is fixed on the air outlet of the fan 1, a combustion head 6 is fixed in the flue gas collecting pipe 5, a feed pipe 7 is fixed on the lower side of the air outlet of the fan 1, the feed pipe 7 can provide fuel gas to the combustion head 6, the fan 1 provides air to the combustion head 6, the two are mixed and burned in the combustion head 6, and the flue gas generated by the combustion enters the flue gas collecting pipe 5, an air suction hood 12 is installed on the air intake port of the fan 1, a return pipe 4 is installed between the air suction hood 12 and the flue gas collecting pipe 5, the fan 1 can absorb the sighing gas through the air suction hood 12 and the return pipe 4, and re-boost it into the combustion head 6 for combustion, a dust removal box 2 is fixed on the return pipe 4, an electrostatic generator 3 is installed on the top of the dust removal box 2, and the dust removal box 2 has an electrostatic generator 3. Dust collecting plates 13 are fixed on both side walls. The electrostatic generator 3 can make the dust collecting plates 13 generate a high-voltage electric field, thereby adsorbing impurities in the flowing flue gas and separating them from the flue gas. Impurities in the flue gas are removed by electrostatic dust removal. While maintaining impurities removal, the airflow reflux rate and recycling rate can also be guaranteed. An ash discharge pipe 11 is fixed to the bottom end of the dust removal box 2, and a baffle 9 is movably installed in the ash discharge pipe 11. When the device is used up, the device is closed. At this time, impurities on the dust collecting plates 13 are discharged through the ash discharge pipe 11 by their own gravity. The baffle 9 controls the on and off of the ash discharge pipe 11. An electric push rod 8 is connected to one side wall of the baffle 9, and a bracket 10 is installed on the fixed part of the electric push rod 8. The electric push rod 8 can drive the baffle 9 to move, thereby realizing the opening and closing of the ash discharge pipe 11.

[0031] like Figure 1-Figure 3 As shown, in this embodiment, the flue gas collecting pipe 5 is connected to the air outlet of the fan 1 through a flange, the burner head 6 is fixed in the flue gas collecting pipe 5, the feed pipe 7 is welded to the air outlet of the fan 1, the suction hood 12 is connected to the suction port of the fan 1 through screws, the return pipe 4 is fixedly connected to the suction hood 12 and the flue gas collecting pipe 5, the dust removal box 2 is fixed to the return pipe 4 through bolts, and the dust removal box 2 is a rectangular structure.

[0032] like Figure 1-Figure 3 As shown, in this embodiment, the electrostatic generator 3 is fixed to the dust removal box 2 by screws, the dust collecting plate 13 is fixed to the inner side walls of the dust removal box 2 by screws, the electrostatic generator 3 is electrically connected to the dust collecting plate 13, the ash discharge pipe 11 is fixed to the bottom end of the dust removal box 2, the baffle 9 is slidably connected to the ash discharge pipe 11, the movable end of the electric push rod 8 is connected to the baffle 9 by screws, the fixed part of the electric push rod 8 is connected to the bracket 10 by bolts, the other end of the bracket 10 is welded to the outer wall of the ash discharge pipe 11, and the bracket 10 is an L-shaped structure.

[0033] The specific implementation process of this embodiment is as follows: when in use, the feed pipe 7 can provide fuel gas to the combustion head 6, and the fan 1 provides air to the combustion head 6. The two are mixed and burned in the combustion head 6, and the smoke generated by the combustion enters the smoke collecting pipe 5. At this time, the fan 1 can absorb the sighing gas through the suction hood 12 and the return pipe 4, and make it re-blown into the combustion head 6 for combustion. During the smoke reflux process, the electrostatic generator 3 can make the dust collecting plate 13 generate a high-voltage electric field, thereby adsorbing impurities in the flowing smoke and separating them from the smoke. Impurities in the smoke can be removed by electrostatic dust removal. While maintaining impurity removal, the airflow reflux rate and reuse rate can also be guaranteed. When the device is used, the device is closed, and the baffle 9 is driven by the electric push rod 8 to move to open the ash discharge pipe 11. The impurities on the dust collecting plate 13 are discharged through the ash discharge pipe 11 by their own gravity.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low nitrogen burner for a boiler, characterized in that: The invention comprises a fan (1), wherein a flue gas collecting pipe (5) is fixed on the air outlet of the fan (1), a combustion head (6) is fixed in the flue gas collecting pipe (5), a feed pipe (7) is fixed on the lower side of the air outlet of the fan (1), an air suction hood (12) is installed on the air intake port of the fan (1), a return pipe (4) is installed between the air suction hood (12) and the flue gas collecting pipe (5), a dust removal box (2) is fixed on the return pipe (4), an electrostatic generator (3) is installed on the top of the dust removal box (2), dust collecting plates (13) are fixed on both side walls of the dust removal box (2), an ash discharge pipe (11) is fixed at the bottom end of the dust removal box (2), a baffle (9) is movably installed in the ash discharge pipe (11), an electric push rod (8) is connected to one side wall of the baffle (9), and a bracket (10) is installed on the fixed part of the electric push rod (8).

2. A low nitrogen burner for a boiler according to claim 1, characterized in that: The flue gas collecting pipe (5) is connected to the air outlet of the fan (1) via a flange, the burner head (6) is fixed inside the flue gas collecting pipe (5), and the feed pipe (7) is welded to the air outlet of the fan (1).

3. A low nitrogen burner for a boiler according to claim 1, characterized in that: The air suction hood (12) is connected to the air suction port of the fan (1) via screws, and the return pipe (4) is fixedly connected to the air suction hood (12) and the smoke collecting pipe (5).

4. A low nitrogen burner for a boiler according to claim 1, characterized in that: The dust removal box (2) is fixed to the return pipe (4) by means of bolts, and the dust removal box (2) is a rectangular parallelepiped structure.

5. A low nitrogen burner for a boiler according to claim 4, characterized in that: The electrostatic generator (3) is fixed to the dust removal box (2) by screws, and the dust collecting plate (13) is fixed to the inner side walls of the dust removal box (2) by screws. The electrostatic generator (3) is electrically connected to the dust collecting plate (13).

6. A low nitrogen burner for a boiler according to claim 5, characterized in that: The ash discharge pipe (11) is fixed at the bottom end of the dust removal box (2), and the baffle (9) is slidably connected to the ash discharge pipe (11).

7. A low nitrogen burner for a boiler according to claim 6, characterized in that: The movable end of the electric push rod (8) is connected to the baffle (9) by means of screws, the fixed portion of the electric push rod (8) is connected to the bracket (10) by means of bolts, the other end of the bracket (10) is welded to the outer wall of the ash discharge pipe (11), and the bracket (10) is an L-shaped structure.

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