Air inducing device of low-nitrogen combustor

Abstract

The utility model relates to the technical field of low-nitrogen combustors, and discloses an air inducing device of a low-nitrogen combustor, which comprises an air inducing box, a mounting plate is arranged on the front side of the air inducing box, the mounting plate consists of a first side wall and a second side wall, an included angle of 100-120 degrees is formed between the first side wall and the second side wall, an air outlet pipe is fixedly communicated with the outer wall of the first side wall, and an air outlet pipe is fixedly communicated with the outer wall of the second side wall. The air outlet pipe is located at the eccentric position below the center point of the mounting plate, an overhaul base is arranged on the outer wall of the second side wall, and an overhaul hole is formed in the front side of the overhaul base and located at the eccentric position above the mounting plate. According to the utility model, the included angle between the first side wall and the second side wall is utilized, so that the included angle between the access hole and the gas outlet pipe is 100-120 degrees, and a maintainer can conveniently extend into the low-nitrogen burner connected with the gas outlet pipe; parts in the low-nitrogen combustor such as an ignition spray pipe in the low-nitrogen combustor and a center spray pipe on a flame stabilizing disc are overhauled or maintained, and the maintenance efficiency and accuracy of maintenance personnel are improved.

Description

Technical Field

[0001] This utility model relates to the field of low-NOx burner technology, and in particular to an induced draft device for a low-NOx burner. Background Technology

[0002] Industrial boilers, tunnel kilns, and large industrial heaters typically use burners that use fossil fuels such as natural gas (mainly methane) or oil to generate heat through combustion. Traditional low-NOx burners are usually equipped with induced draft devices for blowing in air.

[0003] An existing induced draft device for a low-NOx burner (publication number: CN219083157U) has at least the following drawbacks: In actual use, it is inconvenient to disassemble the device casing and inspect the ignition nozzle, the central nozzle on the flame stabilizer plate, etc. inside the low-NOx burner. The entire device casing needs to be disassembled, which leads to inconvenient maintenance operations. Therefore, this utility model is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an induced draft device for a low-NOx burner.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An induced draft device for a low-NOx burner includes an induced draft box. A mounting plate is provided on the front side of the induced draft box. The mounting plate is composed of a first side wall and a second side wall, which have an angle of 100 to 120°. An exhaust pipe is fixedly connected to the outer wall of the first side wall. The exhaust pipe is located at an eccentric position below the center point of the mounting plate. A maintenance seat is provided on the outer wall of the second side wall. An inspection hole is provided on the front side of the maintenance seat. The inspection hole is located at an eccentric position above the mounting plate. An adjusting air baffle is rotatably connected inside the induced draft box.

[0007] As a further embodiment of this utility model, a servo motor is fixed on the left side of the induced draft box, and the output shaft of the servo motor extends through into the interior of the induced draft box. The output shaft of the servo motor is fixed to the left end of the adjusting wind plate.

[0008] As a further embodiment of this utility model, mounting screws are fixed at the four corners of the front side of the inspection base, and a sealing cover is provided on the front side of the inspection base. The sealing cover is movably sleeved with the outer wall of the mounting screw, and a nut is threadedly connected to the outer wall of the mounting screw. The rear side of the nut abuts against the front side of the sealing cover.

[0009] As a further embodiment of this utility model, a detection hole is provided on the left side of the air duct, and a disassembly plate is detachably installed on the right side of the air duct corresponding to the detection hole. An extension hole corresponding to the detection hole is provided on one side of the disassembly plate, and several threaded holes for installing sensors are provided on the disassembly plate.

[0010] As a further embodiment of this utility model, a number of disassembly and assembly seats are fixed on the left side of the air duct box. At least two threaded holes for installing disassembly and assembly plates are opened on one side of the disassembly and assembly seats. A number of bolts are inserted on one side of the disassembly and assembly plates, and the bolts are threadedly connected to the corresponding threaded holes of the disassembly and assembly seats.

[0011] As a further embodiment of this utility model, a mounting ring is fixed to the front side of the induced draft box, and a plurality of mounting holes for mounting with the burner are provided on one side of the mounting ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By opening the inspection hole and the exhaust pipe on the outer walls of the first and second side walls respectively, and utilizing the included angle between the first and second side walls, the inspection hole and the exhaust pipe form an angle of 100 to 120°. This facilitates maintenance personnel reaching into the low-NOx burner connected to the exhaust pipe to inspect or maintain components such as the ignition nozzle and the central nozzle on the flame stabilizer. This improves the efficiency and accuracy of maintenance. Furthermore, because the exhaust pipe is located off-center below the center point of the mounting plate, and the inspection hole is located off-center above the mounting plate, and is located on the inclined second side wall, the inspection hole has a large opening. This further facilitates maintenance personnel to maintain or repair components inside the low-NOx burner through the inspection opening, thereby further improving the efficiency and accuracy of maintenance.

[0014] By setting an adjusting air vane inside the induced draft box, and by setting and rotating the adjusting air vane, the angle formed between the adjusting air vane and the outlet pipe can be changed to alter the gap between the adjusting air vane and the outlet pipe. This not only allows for flexible and convenient adjustment of the gas discharge volume inside the burner casing, but also ensures that the gas discharge volume inside the burner casing meets industrial requirements. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the induced draft device for a low-NOx burner proposed in this utility model;

[0016] Figure 2 This is a three-dimensional disassembled structural diagram of the induced draft device of a low-NOx burner proposed in this utility model;

[0017] Figure 3This is a three-dimensional sectional view of the induced draft box of the induced draft device for a low-NOx burner proposed in this utility model;

[0018] Figure 4 for Figure 3 A schematic diagram of the partial three-dimensional structure of A.

[0019] In the diagram: 1. Exhaust box; 101. Mounting plate; 102. First side wall; 103. Second side wall; 2. Inspection seat; 201. Inspection hole; 202. Mounting screw; 203. Sealing cover; 3. Exhaust pipe; 4. Adjusting fan plate; 5. Servo motor; 6. Detection hole; 601. Disassembly plate; 602. Disassembly seat; 7. Mounting ring. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1-4As shown, an induced draft device for a low-NOx burner includes an induced draft box 1. A mounting plate 101 is provided on the front side of the induced draft box 1. The mounting plate 101 is composed of a first side wall 102 and a second side wall 103, which have an angle of 100 to 120°. An exhaust pipe 3 is fixedly connected to the outer wall of the first side wall 102, located at an eccentric position below the center point of the mounting plate 101. A maintenance seat 2 is provided on the outer wall of the second side wall 103, with a maintenance hole 201 on its front side, located at an eccentric position above the mounting plate 101. An adjusting air baffle 4 is rotatably connected inside the induced draft box 1. By opening the maintenance hole 201 and the exhaust pipe 3 on the outer walls of the first side wall 102 and the second side wall 103 respectively, the induced draft device utilizes the angle between the first side wall 102 and the second side wall 103. The included angle between the two makes the inspection hole 201 and the exhaust pipe 3 form an angle of 100 to 120°, which facilitates maintenance personnel to reach into the low-NOx burner connected to the exhaust pipe 3 to inspect or maintain components inside the low-NOx burner, such as the ignition nozzle and the central nozzle on the flame stabilizer. This improves the maintenance efficiency and accuracy of the personnel. Furthermore, since the exhaust pipe 3 is located at an off-center position below the center point of the mounting plate 101, and the inspection hole 201 is located at an off-center position above the mounting plate 101, and the inspection hole 201 is opened on the second side wall 103 of the inclined surface, the inspection hole 201 has a large opening, which further facilitates maintenance personnel to maintain or inspect the components inside the low-NOx burner through the inspection opening, thereby further improving the maintenance efficiency and accuracy of the personnel.

[0024] like Figures 2-4 As shown, in this embodiment, a servo motor 5 is fixed on the left side of the induced draft box 1. The output shaft of the servo motor 5 extends through into the interior of the induced draft box 1. The output shaft of the servo motor 5 is fixed to the left end of the adjusting air plate 4. The adjusting air plate 4 is rotated by the servo motor 5, so that the angle formed between the adjusting air plate 4 and the exhaust pipe 3 is changed to adjust the gap between the port of the adjusting air plate 4 and the exhaust pipe 3. This not only allows for flexible and convenient adjustment of the gas discharge volume inside the burner shell, but also ensures that the gas discharge volume inside the burner shell meets industrial requirements.

[0025] like Figures 2-4 As shown in this embodiment, mounting screws 202 are fixed at the four corners of the front side of the maintenance base 2. A sealing cover 203 is provided on the front side of the maintenance base 2. The sealing cover 203 is movably sleeved on the outer wall of the mounting screws 202. A nut is threadedly connected to the outer wall of the mounting screws 202. The rear side of the nut abuts against the front side of the sealing cover 203. The sealing cover 203 is detachably installed with the mounting screws 202 and the nut on the maintenance base 2, which facilitates the removal of the sealing cover 203 to inspect the components inside the induced draft box 1.

[0026] like Figures 2-4 As shown in this embodiment, a detection hole 6 is provided on the left side of the induced draft box 1, and a disassembly plate 601 is detachably installed on the right side of the induced draft box 1 at a position corresponding to the detection hole 6. An extension hole corresponding to the detection hole 6 is provided on one side of the disassembly plate 601, and several threaded holes for installing sensors are provided on the disassembly plate 601. By setting the disassembly plate 601 and the detection hole 6, it is convenient to install a wind speed sensor on one side of the induced draft box 1, thereby detecting the amount of gas discharged from the burner housing, and facilitating the adjustment of the opening of the regulating wind vane 4 according to the detection results.

[0027] like Figures 2-4 As shown in this embodiment, a plurality of mounting and disassembly bases 602 are fixed on the left side of the air duct 1. At least two threaded holes for mounting and disassembly plates 601 are opened on one side of the mounting and disassembly base 602. A plurality of bolts are inserted on one side of the mounting and disassembly plate 601. The bolts are threadedly connected to the corresponding threaded holes of the mounting and disassembly base 602. By setting the mounting and disassembly bases 602, it is convenient to install different mounting and disassembly plates 601 at the detection hole 6 of the air duct 1, thereby facilitating the installation of different types of sensors.

[0028] like Figures 2-4 As shown in this embodiment, an installation ring 7 is fixed to the front side of the induced draft box 1. A plurality of installation holes for mounting with the burner are opened on one side of the installation ring 7. By setting the installation ring 7, it is convenient to detachably install the induced draft box 1 and the burner.

[0029] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: By driving the adjusting air plate 4 to rotate through the servo motor 5, the angle formed between the adjusting air plate 4 and the outlet pipe 3 is changed to alter the gap between the port of the adjusting air plate 4 and the outlet pipe 3. This not only allows for flexible and convenient adjustment of the gas discharge volume inside the burner housing, but also ensures that the gas discharge volume inside the burner housing meets industrial requirements. By opening the inspection hole 201 and the outlet pipe 3 on the outer walls of the first side wall 102 and the second side wall 103 respectively, and utilizing the angle between the first side wall 102 and the second side wall 103, the inspection hole 201 and the outlet pipe 3 have an angle of 100 to 120°. This facilitates maintenance personnel to reach into the low-NOx burner connected to the outlet pipe 3 to inspect or maintain components inside the low-NOx burner, such as the ignition nozzle and the central nozzle on the flame stabilizer plate. This improves the maintenance efficiency and accuracy of maintenance personnel. Furthermore, since the outlet pipe 3 is located at the center point of the mounting plate 101... The inspection hole 201 is located at an eccentric position above the mounting plate 101. It is also located on the second side wall 103 of the inclined surface, providing a large opening to facilitate maintenance personnel in accessing and repairing components within the low-NOx burner. This improves maintenance efficiency and accuracy. The sealing cover 203 is detachably mounted to the inspection seat 2 using mounting screws 202 and nuts, allowing for easy removal of the cover to inspect components inside the induced draft box 1. The installation of the disassembly plate 601 and the detection hole 6 facilitates the installation of a wind speed sensor on one side of the induced draft box 1 to detect the amount of gas discharged from the burner casing. This allows for adjustment of the air deflector 4 based on the detection structure. The disassembly seat 602 allows for the installation of different disassembly plates 601 at the detection hole 6 of the induced draft box 1, facilitating the installation of different sensor models. The installation ring 7 facilitates the detachable installation of the induced draft box 1 and the burner.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An induced draft device for a low-NOx burner, comprising an induced draft box (1), characterized in that, The front side of the induced draft box (1) is provided with an installation plate (101). The installation plate (101) is composed of a first side wall (102) and a second side wall (103). The first side wall (102) and the second side wall (103) have an angle of 100 to 120°. The outer wall of the first side wall (102) is connected to and fixed with an air outlet pipe (3). The air outlet pipe (3) is located at an eccentric position below the center point of the installation plate (101). The outer wall of the second side wall (103) is provided with a maintenance seat (2). The front side of the maintenance seat (2) is provided with a maintenance hole (201). The maintenance hole (201) is located at an eccentric position above the installation plate (101). The interior of the induced draft box (1) is rotatably connected with an adjusting air plate (4).

2. The induced draft device for a low-NOx burner according to claim 1, characterized in that, A servo motor (5) is fixed on the left side of the air duct (1). The output shaft of the servo motor (5) extends through the air duct (1) and is fixed to the left end of the adjusting air plate (4).

3. The induced draft device for a low-NOx burner according to claim 2, characterized in that, The four corners of the front side of the inspection seat (2) are all fixed with mounting screws (202). A sealing cover (203) is provided on the front side of the inspection seat (2). The sealing cover (203) is movably sleeved with the outer wall of the mounting screw (202). The outer wall of the mounting screw (202) is threaded with a nut. The rear side of the nut abuts against the front side of the sealing cover (203).

4. The induced draft device for a low-NOx burner according to claim 3, characterized in that, The air duct (1) has a detection hole (6) on its left side. A disassembly plate (601) is detachably installed on the right side of the air duct (1) at the position corresponding to the detection hole (6). An extension hole corresponding to the detection hole (6) is opened on one side of the disassembly plate (601). Several threaded holes for installing sensors are opened on the disassembly plate (601).

5. The induced draft device for a low-NOx burner according to claim 4, characterized in that, The left side of the air box (1) is fixed with several mounting and disassembly seats (602). At least two threaded holes for mounting and disassembly plates (601) are opened on one side of the mounting and disassembly seats (602). Several bolts are inserted on one side of the mounting and disassembly plates (601), and the bolts are threadedly connected to the corresponding threaded holes of the mounting and disassembly seats (602).

6. The induced draft device for a low-NOx burner according to claim 5, characterized in that, The front side of the induced draft box (1) is fixed with an installation ring (7), and a number of installation holes for mounting with the burner are opened on one side of the installation ring (7).

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