Staged combustion low-nitrogen combustor

Abstract

The utility model discloses a staged combustion low-nitrogen burner, which relates to the technical field of burners and comprises a burner shell and a cleaning component, an air blower is mounted at the top of the burner shell, the output end of the air blower is connected with a gas inlet pipe, the bottom of the gas inlet pipe is connected with a flow guide disc, and the flow guide disc is connected with the cleaning component. The cleaning assembly is arranged on the upper portion of the interior of the combustor shell and comprises a positive and negative tooth trapezoidal lead screw, a hand wheel, a first lead screw nut, a second lead screw nut, a first adjusting rod, a second adjusting rod, a first fluted disc, a rotating shaft, a supporting plate, a second fluted disc, a coarse brush and a bearing. According to the staged combustion low-nitrogen combustor, by rotating an external hand wheel, a first lead screw nut and a second lead screw nut horizontally move in the opposite direction or the opposite direction relative to the outer portion of a positive and negative tooth trapezoid lead screw, and angle changes of a first adjusting rod and a second adjusting rod are caused to enable a first fluted disc to rotate along a rotating shaft; the first fluted disc drives the second fluted disc to conduct transmission, so that the coarse brushes move around the flow guide disc by a circle, and dust in holes is brushed off through friction force.

Description

Technical Field

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

[0002] For boiler equipment, the burner is a key factor affecting the emission of nitrogen oxides. In order to meet the relevant emission standards of atmospheric pollutants of boiler equipment, the transformation and upgrading of burners has become a research focus of industry technicians. The existing stage burners designed according to the principle of staged combustion make the fuel and air mixed and burned in stages. Since the combustion deviates from the theoretical equivalent ratio, the generation of nitrogen can be reduced.

[0003] For example, the utility model with application number CN202320354089.6 discloses a graded gas low-nitrogen burner. The utility model starts the blower to draw air into the inner cavity of the guide plate. After the air is diverted by the guide plate, it is dispersed and discharged into the burner through the diverter holes on the guide plate. Then, the control valve on the gas graded air inlet pipe is opened to discharge the gas into the gas graded pipe, so that the gas enters the multiple gas nozzles installed on the gas graded pipe, and is graded and discharged into the burner through the flared nozzles and straight nozzles on the gas nozzles, thereby improving the utilization rate of the gas. However, dust and impurities in the drawn-in air will adhere to the inner wall of the guide plate, causing the diverter holes to be blocked, thereby aggravating the energy consumption of the blower and affecting the final combustion effect.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a staged combustion low-nitrogen burner is proposed. Utility Model Content

[0005] The utility model aims to provide a staged combustion low-nitrogen burner to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a staged combustion low-nitrogen burner, comprising a burner shell and a cleaning assembly, a blower is installed on the top of the burner shell, and the output end of the blower is connected to an air intake pipe, and the bottom of the air intake pipe is connected to a guide plate, the cleaning assembly is arranged above the inside of the burner shell, and the cleaning assembly comprises a positive and negative tooth trapezoidal screw, a hand wheel, a screw nut 1, a screw nut 2, an adjustment rod 1, an adjustment rod 2, a toothed disc 1, a rotating shaft, a support plate, a toothed disc 2, a coarse brush and a shaft The right end of the forward and reverse thread trapezoidal screw rod passes through the right side of the burner shell and is connected to a handwheel, and the outside of the forward and reverse thread trapezoidal screw rod is connected to screw nut 1 and screw nut 2, the middle part of screw nut 1 and the middle part of screw nut 2 are respectively connected to adjusting rod 1 and adjusting rod 2 through a rotating shaft, and the other end of adjusting rod 2 is connected to toothed disc 1 through a rotating shaft, the bottom of toothed disc 1 is connected to a rotating rod, and a support plate is provided at the bottom of the rotating rod, the outside of the intake pipe is connected to toothed disc 2 through a bearing, and the bottom of toothed disc 2 is connected to a coarse brush.

[0007] Furthermore, a gas grading mechanism is provided at the opening on the right side of the burner shell, and a gas outlet is provided at the upper left side of the burner shell.

[0008] Furthermore, the guide plate is a hollow truncated cone-shaped structure, and the guide plate and the second gear plate are coaxially arranged.

[0009] Furthermore, one end of the forward and reverse thread trapezoidal screw rod away from the hand wheel is rotatably connected to the burner housing, and the forward and reverse thread trapezoidal screw rod and the rotating shaft are perpendicular to each other.

[0010] Furthermore, the support plate is fixed above the rear end of the burner housing, and the first adjustment rod and the second adjustment rod are parallel to each other.

[0011] Furthermore, the first toothed disc and the second toothed disc are meshedly connected, and the guide disc and the coarse-bristled brush are tightly fitted.

[0012] Furthermore, a carrier plate is disposed inside the guide plate, and the threads on the inner surface of the guide plate match the threads on the outer surface of the carrier plate.

[0013] The utility model provides a staged combustion low-nitrogen burner, which has the following beneficial effects:

[0014] 1. The guide plate arranged at one end of the air intake pipe away from the blower can filter most of the impurities in the air, reduce the influence of the impurities on the combustion quality, and the intercepted impurities are accumulated on the carrier plate, which can be cleaned by screwing the carrier plate.

[0015] 2. The utility model rotates an external hand wheel to make screw nut 1 and screw nut 2 move horizontally toward or away from the outside of the positive and negative trapezoidal screw, causing the angle of adjusting rod 1 and adjusting rod 2 to change, so that toothed disc 1 rotates along the rotating shaft, and toothed disc 1 drives toothed disc 2 to realize the coarse-bristled brush to move around the guide disc for one circle, relying on friction to brush away the dust in the drop hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of a burner shell of a staged combustion low-nitrogen burner of the utility model;

[0017] Figure 2 It is a schematic diagram of the top view of the gear disc 1 and the gear disc 2 of a staged combustion low nitrogen burner of the utility model;

[0018] Figure 3 The utility model is a schematic diagram of the three-dimensional structure of a guide plate and a carrier plate of a staged combustion low-nitrogen burner.

[0019] In the figure: 1. burner housing; 2. gas grading mechanism; 3. gas outlet; 4. blower; 5. air inlet pipe; 6. guide plate; 7. cleaning assembly; 701. positive and negative trapezoidal screw; 702. hand wheel; 703. screw nut one; 704. screw nut two; 705. adjusting rod one; 706. adjusting rod two; 707. toothed disc one; 708. rotating rod; 709. supporting plate; 710. toothed disc two; 711. coarse brush; 712. bearing; 8. carrier plate. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] like Figure 1 and Figure 3 As shown, a staged combustion low-nitrogen burner includes a burner shell 1 and a cleaning assembly 7. A gas grading mechanism 2 is provided at the opening on the right side of the burner shell 1, and an air outlet 3 is provided on the upper left side of the burner shell 1. A blower 4 is installed on the top of the burner shell 1, and the output end of the blower 4 is connected to an air inlet pipe 5, and the bottom of the air inlet pipe 5 is connected to a guide plate 6. A carrier plate 8 is provided inside the guide plate 6, and the threads on the inner surface of the guide plate 6 match the threads on the outer surface of the carrier plate 8.

[0022] The specific operation is as follows: the guide plate 6 arranged at one end of the air inlet pipe 5 away from the blower 4 can filter most of the impurities in the air and reduce the impact of the impurities on the combustion quality. The intercepted impurities are accumulated on the carrier plate 8 and can be cleaned by screwing the carrier plate 8.

[0023] like Figure 1and Figure 2 As shown, the cleaning assembly 7 is arranged above the inside of the burner housing 1, and the cleaning assembly 7 includes a positive and negative thread trapezoidal screw 701, a hand wheel 702, a screw nut 1 703, a screw nut 2 704, an adjusting rod 1 705, an adjusting rod 2 706, a toothed disc 1 707, a rotating rod 708, a support plate 709, a toothed disc 2 710, a coarse brush 711 and a bearing 712. The right end of the positive and negative thread trapezoidal screw 701 passes through the right side of the burner housing 1 and is connected to the hand wheel 702, and the outside of the positive and negative thread trapezoidal screw 701 is connected to the screw nut 1 703 and the screw nut 2 704, the middle part of the screw nut 1 703 and the middle part of the screw nut 2 704 are respectively connected to the adjusting rod 1 705 and the adjusting rod 2 706 through a rotating shaft, and the other end of the adjusting rod 2 706 is connected to Toothed disc 1 707, the bottom of which is connected to a rotating rod 708, and a support plate 709 is provided at the bottom of the rotating rod 708, the outside of the intake pipe 5 is connected to toothed disc 2 710 through a bearing 712, and the bottom of toothed disc 2 710 is connected to a coarse brush 711, the guide plate 6 is a hollow truncated cone structure, and the guide plate 6 and toothed disc 2 710 are coaxially arranged, the end of the positive and negative tooth trapezoidal screw rod 701 away from the hand wheel 702 is rotatably connected to the burner housing 1, and the positive and negative tooth trapezoidal screw rod 701 and the rotating rod 708 are perpendicular to each other, the support plate 709 is fixed above the rear end inside the burner housing 1, the adjusting rod 1 705 and the adjusting rod 2 706 are parallel to each other, the toothed disc 1 707 and the toothed disc 2 710 are meshingly connected, and the guide plate 6 and the coarse brush 711 fit tightly.

[0024] The specific operation is as follows: by rotating the external handwheel 702, the screw nut 1 703 and the screw nut 2 704 are horizontally displaced toward or away from the outside of the positive and negative trapezoidal screw 701, causing the angle of the adjusting rod 1 705 and the adjusting rod 2 706 to change, so that the toothed disc 1 707 rotates along the rotating rod 708, and the toothed disc 2 710 is driven by the toothed disc 1 707 to realize the coarse brush 711 to move around the guide plate 6 for one circle, and the dust in the drop hole is brushed off by friction.

[0025] In summary, when the staged combustion low-nitrogen burner is used, first, the gas staged mechanism 2 is composed of the gas staged pipe, gas staged air intake pipe, control valve, gas nozzle, flared nozzle, and straight nozzle in the patent mentioned in the background technology part. During the process of gas being discharged into the burner housing 1 through the gas staged mechanism 2, air is drawn into the air intake pipe 5 by the blower 4, and is filtered and dispersed by the guide plate 6 and discharged into the burner housing 1, so that the gas and air are contacted and mixed, the combustion is more complete and energy-saving, and the emission of nitrogen oxides is reduced;

[0026] When the guide plate 6 has been used for a long time and a large amount of dust and impurities have accumulated on its surface, the burner is turned off, and the hand wheel 702 is manually turned to make the screw nut 1 703 and the screw nut 2 704 move horizontally toward or away from the outside of the positive and negative trapezoidal screw 701, thereby changing the supporting angle of the adjusting rod 1 705 and the adjusting rod 2 706 to the toothed disc 1 707, so that the toothed disc 1 707 rotates along the rotating rod 708 and drives the toothed disc 2 710 to transmit. At this time, the coarse brush 711 at the bottom of the toothed disc 2 710 moves around the guide plate 6 for one circle, and the dust in the hole is brushed off by the friction between the coarse brush 711 and the guide plate 6, so that the guide plate 6 can be restored to a clean state, thereby intercepting impurities in the air, preventing impurities from entering the burner housing 1 during combustion and affecting the combustion quality, and at the same time avoiding the energy consumption of the blower 4 due to the blockage of the guide plate 6. The impurities intercepted by the guide plate 6 will accumulate on the carrier plate 8, and can be cleaned by screwing the carrier plate 8 later.

[0027] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A staged combustion low nitrogen burner, comprising a burner housing (1) and a cleaning assembly (7), characterized in that: A blower (4) is installed on the top of the burner housing (1), and the output end of the blower (4) is connected to an air intake pipe (5), and the bottom of the air intake pipe (5) is connected to a guide plate (6). The cleaning assembly (7) is arranged on the upper part of the burner housing (1), and the cleaning assembly (7) comprises a positive and negative tooth trapezoidal screw (701), a hand wheel (702), a screw nut 1 (703), a screw nut 2 (704), an adjustment rod 1 (705), an adjustment rod 2 (706), a toothed disc 1 (707), a rotating rod (708), a support plate (709), a toothed disc 2 (710), a coarse brush (711) and a bearing (712). The right end of the positive and negative tooth trapezoidal screw (701) passes through the right end of the burner housing (1). The side is connected with a hand wheel (702), and the outside of the positive and negative trapezoidal screw (701) is connected with a screw nut 1 (703) and a screw nut 2 (704), the middle of the screw nut 1 (703) and the middle of the screw nut 2 (704) are respectively connected with an adjusting rod 1 (705) and an adjusting rod 2 (706) through a rotating shaft, and the other end of the adjusting rod 2 (706) is connected with a toothed disc 1 (707) through a rotating shaft, the bottom of the toothed disc 1 (707) is connected with a rotating rod (708), and a support plate (709) is provided at the bottom of the rotating rod (708), the outside of the intake pipe (5) is connected with a toothed disc 2 (710) through a bearing (712), and the bottom of the toothed disc 2 (710) is connected with a coarse brush (711).

2. A staged combustion low nitrogen burner according to claim 1, characterized in that: A gas staging mechanism (2) is provided at the opening on the right side of the burner housing (1), and a gas outlet (3) is provided at the upper left side of the burner housing (1).

3. A staged combustion low nitrogen burner according to claim 1, characterized in that: The guide plate (6) is a hollow truncated cone-shaped structure, and the guide plate (6) and the second toothed plate (710) are coaxially arranged.

4. A staged combustion low nitrogen burner according to claim 1, characterized in that: One end of the forward and reverse threaded trapezoidal screw (701) away from the hand wheel (702) is rotatably connected to the burner housing (1), and the forward and reverse threaded trapezoidal screw (701) and the rotating rod (708) are perpendicular to each other.

5. The staged combustion low nitrogen burner according to claim 1, characterized in that: The support plate (709) is fixed above the rear end inside the burner housing (1), and the first adjustment rod (705) and the second adjustment rod (706) are parallel to each other.

6. The staged combustion low nitrogen burner according to claim 1, characterized in that: The toothed disc one (707) and the toothed disc two (710) are meshingly connected, and the guide disc (6) and the coarse brush (711) are tightly fitted.

7. The staged combustion low nitrogen burner according to claim 1, characterized in that: A carrier plate (8) is arranged inside the guide plate (6), and the threads on the inner surface of the guide plate (6) match the threads on the outer surface of the carrier plate (8).

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