Low-nitrogen emission structure of combustion chamber of natural gas boiler

Abstract

The utility model discloses a low-nitrogen emission structure of a combustion chamber of a natural gas boiler, which relates to the technical field of low-nitrogen emission and comprises a connecting pipe and a cleaning component. An opening is formed in the right side of the lower end of the circumferential surface of the connecting pipe, a discharging frame is fixed in the opening, a connecting flange ring is fixed to the right end of the circumferential surface of the connecting pipe, an adsorption assembly and a fixing assembly are installed at the left end of the interior of the connecting pipe, and the fixing assembly is matched with the adsorption assembly; a rotating assembly is mounted on the circumferential surface of the connecting pipe; the cleaning assembly comprises a fixing strip, a rotating shaft, connecting frames, a fixing strip and bristles, the fixing strip is fixed to the upper end of the interior of the connecting pipe, a rotating hole is formed in the lower side edge of the fixing strip, the rotating shaft is rotationally connected to the interior of the rotating hole, and the two corresponding connecting frames are fixed to the circumferential face of the rotating shaft; smoke can be filtered, nitrogen emission can be reduced, and the inner wall of the pipeline can be cleaned.

Description

Technical Field

[0001] This utility model relates to the field of low nitrogen emission technology, specifically a low nitrogen emission structure for a natural gas boiler combustion chamber. Background Technology

[0002] Natural gas boilers are classified as special equipment. Their design, production, delivery, and installation must be subject to inspection by the national technical supervision department. Users need to obtain a boiler operation certificate to operate the boiler. Unlike atmospheric pressure boilers, natural gas boilers must be accompanied by boiler documentation when they leave the factory. Boiler documentation includes boiler body drawings, installation drawings, instrument and valve drawings, piping drawings, and inspection certificates, etc.

[0003] Existing natural gas boilers typically release exhaust gas directly into the air during operation, which not only pollutes the air but also causes a large amount of dust to adhere to the inner wall of the exhaust pipe, affecting the service life of the device, accelerating the damage of the exhaust pipe, and making it inconvenient for users to clean. Therefore, an exhaust device is needed to assist in its use. To address this, we propose a low-NOx emission structure for the combustion chamber of a natural gas boiler. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a low-NOx emission structure for the combustion chamber of a natural gas boiler, which can filter flue gas to reduce nitrogen emissions and clean the inner wall of the pipe, thus effectively solving the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-NOx emission structure for a natural gas boiler combustion chamber, comprising a connecting pipe and a cleaning assembly;

[0006] Connecting pipe: An opening is provided on the lower right side of the circumferential surface, and a discharge frame is fixed inside the opening. A connecting flange ring is fixed on the right end of the circumferential surface of the connecting pipe. An adsorption component and a fixing component are installed on the left end inside the connecting pipe. The fixing component cooperates with the adsorption component. A rotating component is installed on the circumferential surface of the connecting pipe.

[0007] Cleaning component: includes a fixing strip, a rotating shaft, a connecting frame, and bristles. The upper end of the connecting tube is fixed with a fixing strip, and a rotating hole is opened on the lower side of the fixing strip. The rotating shaft is rotatably connected inside the rotating hole. Two corresponding connecting frames are fixed on the circumference of the rotating shaft. The fixing strip is fixed on the side of the connecting frame, and the bristles are evenly distributed on the side of the fixing strip. All the bristles are in contact with the inner wall of the connecting tube. The rotating component is connected to the rotating shaft. The cleaning component is used to clean the inner wall of the connecting tube.

[0008] Furthermore, the rotating assembly includes a mounting box, a motor, a sprocket, a sprocket ring, and a chain. The mounting box is fixed to the left side of the upper end of the circumferential surface of the connecting tube. The motor is mounted on the circumferential surface of the connecting tube. A sprocket is fixed on the output shaft of the motor. A sprocket ring is fixed to the left end of the circumferential surface of the rotating shaft. The sprocket and the sprocket ring are connected by a chain. Two corresponding openings are formed on the circumferential surface of the connecting tube. The chain is located inside the two openings. The input end of the motor is electrically connected to the output end of an external control switch group. The rotating assembly drives the rotating shaft to rotate.

[0009] Furthermore, the adsorption assembly includes an installation tube, a limiting ring, a filter screen, and a molecular sieve. The installation tube is fixed to the left end inside the connecting tube, and the limiting ring is fixed to the right end inside the installation tube. Two corresponding filter screens are arranged inside the installation tube, with the right filter screen fixed inside the installation tube. Molecular sieves are evenly distributed between the two filter screens. By setting the molecular sieves, nitrogen in the flue gas is adsorbed, reducing nitrogen emissions. The molecular sieve can be 13X molecular sieve.

[0010] Furthermore, the fixing component includes a fastening ring and an external threaded ring. The left end of the left filter screen is provided with a fastening ring, and the left end of the installation tube is threadedly connected with an external threaded ring. The external threaded ring fits into the left end of the fastening ring, thereby fixing the left filter screen by setting the fixing component.

[0011] Furthermore, two corresponding rotating rings are rotatably connected to the right end of the circumferential surface of the connecting pipe. The lower end of the circumferential surface of the rotating rings is provided with an opening, and a sealing plate is fixed inside the two openings. The sealing plate corresponds to the discharge frame. The two rotating rings are fixed to the circumferential surface of the connecting pipe by two bolts, and the discharge frame is sealed by setting the sealing plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the low-NOx emission structure of this natural gas boiler combustion chamber has the following advantages:

[0013] 1. Through the linkage design of the cleaning and rotating components, the motor drives the brush bristles to rotate and sweep along the inner wall of the connecting pipe, which can automatically remove attached dust and impurities, avoid pipe blockage or corrosion, and significantly extend the service life of the equipment. At the same time, the discharge frame and the rotatable sealing plate work together to achieve rapid collection and discharge of cleaning waste, greatly reducing the frequency of manual cleaning and maintenance costs.

[0014] 2. The adsorption component employs a composite structure of a double-layer filter and a molecular sieve. The filter intercepts large particulate pollutants, while the molecular sieve efficiently adsorbs nitrogen oxides. The detachable design of the fixed components facilitates the replacement of the molecular sieve and the cleaning of the filter, ensuring consistently stable adsorption efficiency and effectively reducing the concentration of nitrogen oxides in flue gas to meet environmental emission requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0016] Figure 2 This is a front sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the left side structure of this utility model.

[0018] In the diagram: 1 Connecting pipe, 2 Discharge frame, 3 Cleaning assembly, 31 Fixing strip, 32 Rotating shaft, 33 Connecting frame, 34 Fixing strip, 35 Brush bristles, 4 Rotating assembly, 41 Mounting box, 42 Motor, 43 Sprocket, 44 Sprocket ring, 45 Chain, 5 Adsorption assembly, 51 Mounting pipe, 52 Limiting ring, 53 Filter screen, 54 Molecular sieve, 6 Fixing assembly, 61 Fastening ring, 62 External threaded ring, 7 Rotating ring, 8 Sealing plate, 9 Bolt, 10 Connecting flange ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This embodiment provides a technical solution: a low-NOx emission structure for a natural gas boiler combustion chamber, including a connecting pipe 1 and a cleaning component 3;

[0021] Connecting pipe 1: An opening is provided on the lower right side of the circumferential surface. A discharge frame 2 is fixed inside the opening. A connecting flange ring 10 is fixed to the right end of the circumferential surface of connecting pipe 1. An adsorption component 5 and a fixing component 6 are installed on the left end inside the connecting pipe 1. The fixing component 6 cooperates with the adsorption component 5. A rotating component 4 is installed on the circumferential surface of connecting pipe 1. The rotating component 4 includes a mounting box 41, a motor 42, a sprocket 43, a sprocket ring 44, and a chain 45. The mounting box 41 is fixed to the upper left side of the circumferential surface of connecting pipe 1. A motor 42 is installed on the circumferential surface of connecting pipe 1. A sprocket 43 is fixed on the output shaft of the motor 42. A sprocket ring 44 is fixed to the left end of the circumferential surface of the rotating shaft 32. The sprocket 43 and the sprocket ring 44 are connected by a chain 45. Two corresponding openings are provided on the circumferential surface of connecting pipe 1. The chain 45 is located inside the two openings. The input end of the motor 42 is electrically connected to the output end of an external control switch group. The auxiliary component 5 includes an installation tube 51, a limiting ring 52, a filter screen 53, and a molecular sieve 54. The installation tube 51 is fixed to the left end inside the connecting tube 1, and the limiting ring 52 is fixed to the right end inside the installation tube 51. Two corresponding filter screens 53 are provided inside the installation tube 51. The filter screen 53 on the right is fixed inside the installation tube 51, and the space between the two filter screens 53 is filled with evenly distributed molecular sieves 54. The fixing component 6 includes a fastening ring 61 and an external threaded ring 62. The left end of the filter screen 53 on the left is provided with a fastening ring 61, and the left end of the installation tube 51 is threadedly connected to an external threaded ring 62. The external threaded ring 62 fits against the left end of the fastening ring 61. The left filter screen 53 is fixed by the fixing component 6, and the nitrogen in the flue gas is adsorbed by the molecular sieve 54 to reduce nitrogen emissions. The molecular sieve 54 can be a 13X molecular sieve. The rotating component 4 drives the rotating shaft 32 to rotate.

[0022] Cleaning component 3 includes a fixing strip 31, a rotating shaft 32, a connecting frame 33, a fixing strip 34, and bristles 35. The upper end of the connecting tube 1 is fixed with a fixing strip 31. A rotating hole is opened on the lower side of the fixing strip 31. The rotating shaft 32 is rotatably connected inside the rotating hole. Two corresponding connecting frames 33 are fixed on the circumferential surface of the rotating shaft 32. The fixing strip 34 is fixed on the side of the connecting frame 33. The bristles 35 are evenly distributed on the side of the fixing strip 34. All the bristles 35 are in contact with the inner wall of the connecting tube 1. The rotating component 4 is connected to the rotating shaft 32. The inner wall of the connecting tube 1 is cleaned by setting the cleaning component 3.

[0023] Wherein: the right end of the circumferential surface of the connecting pipe 1 is rotatably connected to two corresponding rotating rings 7. The lower end of the circumferential surface of the rotating ring 7 is provided with an opening. A sealing plate 8 is fixed inside the two openings. The sealing plate 8 corresponds to the discharge frame 2. The two rotating rings 7 are fixed to the circumferential surface of the connecting pipe 1 by two bolts 9. The discharge frame 2 is sealed by setting the sealing plate 8.

[0024] The working principle of the low-NOx emission structure for the combustion chamber of a natural gas boiler provided by this utility model is as follows: After the flue gas generated in the combustion chamber enters through the left end of the connecting pipe 1, it first undergoes graded adsorption of nitrogen oxides in the flue gas by the synergistic action of the double-layer filter screen 53 and molecular sieve 54 in the adsorption component 5; then the flue gas flows to the right along the inner cavity of the connecting pipe 1, and finally enters the external emission system through the connecting flange ring 10. During this process, the motor 42 of the rotating component 4 drives the rotating shaft 32 to rotate through the sprocket 43, chain 45 and sprocket ring 44, which drives the bristles 35 on the connecting frame 33 to clean the inner wall of the connecting pipe 1, and the stripped dust is discharged through the discharge frame 2. When maintenance is required, the fastening ring 61 can be removed by loosening the external threaded ring 62 of the fixing component 6, so as to quickly replace the filter screen 53 and molecular sieve 54. The sealing plate 8 cooperates with the rotating ring 7 to ensure the sealing of the discharge frame 2, and the bolt 9 is used to fix the position of the rotating ring 7.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A low NOx emission configuration for a natural gas boiler combustion chamber, characterized by: Includes a connecting pipe (1) and a cleaning assembly (3); Connecting pipe (1): An opening is provided on the right side of the lower end of the circumferential surface. A discharge frame (2) is fixed inside the opening. A connecting flange ring (10) is fixed on the right end of the circumferential surface of the connecting pipe (1). An adsorption component (5) and a fixing component (6) are installed on the left end inside the connecting pipe (1). The fixing component (6) cooperates with the adsorption component (5). A rotating component (4) is installed on the circumferential surface of the connecting pipe (1). Cleaning component (3): includes a fixing strip (31), a rotating shaft (32), a connecting frame (33), a fixing strip (34), and bristles (35). The upper end of the connecting tube (1) is fixed with a fixing strip (31). A rotating hole is opened on the lower side of the fixing strip (31). The rotating shaft (32) is rotatably connected inside the rotating hole. Two corresponding connecting frames (33) are fixed on the circumferential surface of the rotating shaft (32). A fixing strip (34) is fixed on the side of the connecting frame (33). Bristles (35) are evenly distributed on the side of the fixing strip (34). All the bristles (35) are in contact with the inner wall of the connecting tube (1). The rotating component (4) is connected to the rotating shaft (32).

2. A low NOx emission structure for a gas-fired boiler combustion chamber according to claim 1, characterized in that: The rotating assembly (4) includes a mounting box (41), a motor (42), a sprocket (43), a sprocket ring (44), and a chain (45). The mounting box (41) is fixed on the left side of the upper end of the circumferential surface of the connecting pipe (1). The motor (42) is mounted on the circumferential surface of the connecting pipe (1). The sprocket (43) is fixed on the output shaft of the motor (42). The sprocket ring (44) is fixed on the left end of the circumferential surface of the rotating shaft (32). The sprocket (43) and the sprocket ring (44) are connected by the chain (45). Two corresponding openings are opened on the circumferential surface of the connecting pipe (1). The chain (45) is located inside the two openings. The input end of the motor (42) is electrically connected to the output end of an external control switch group.

3. A low NOx emission structure for a gas-fired boiler combustion chamber according to claim 1, characterized in that: The adsorption assembly (5) includes an installation tube (51), a limiting ring (52), a filter screen (53), and a molecular sieve (54). The installation tube (51) is fixed at the left end inside the connecting tube (1), and the limiting ring (52) is fixed at the right end inside the installation tube (51). Two corresponding filter screens (53) are arranged inside the installation tube (51). The filter screen (53) on the right is fixed inside the installation tube (51), and the space between the two filter screens (53) is filled with a uniformly distributed molecular sieve (54).

4. A low NOx emission structure for a gas-fired boiler combustion chamber according to claim 3, characterized in that: The fixing component (6) includes a fastening ring (61) and an external threaded ring (62). The left end of the filter screen (53) on the left side is provided with a fastening ring (61), and the left end of the mounting tube (51) is threadedly connected to an external threaded ring (62). The external threaded ring (62) is in contact with the left end of the fastening ring (61).

5. A low NOx emission structure for a gas-fired boiler combustion chamber according to claim 1, characterized in that: The right end of the circumference surface of the connecting pipe (1) is rotatably connected with two corresponding rotating rings (7), the lower end of the circumference surface of the rotating ring (7) is provided with an opening, the inside of the two openings is fixed with a sealing plate (8), the sealing plate (8) is corresponding to the discharging frame (2), and the two rotating rings (7) are fixed on the circumference surface of the connecting pipe (1) through two bolts (9).

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