Hydrogen-burning gas premixing burning surface

Abstract

The utility model discloses a hydrogen-burning gas premixing burning surface, which comprises an upper box body and a lower box body, a water-cooling tube row I and a water-cooling tube row II are communicated between the upper box body and the lower box body, the water-cooling tube row I comprises a plurality of water-cooling tubes I, the water-cooling tube row II comprises a plurality of water-cooling tubes II, the water-cooling tubes I and the water-cooling tubes II are positioned in a hearth, and the water-cooling tubes I and the water-cooling tubes II are communicated with the upper box body. A sealing plate I, a sealing plate II and two flow guide plates are fixedly connected to the outer side wall of the water cooling pipe I, the two flow guide plates are fixedly connected between the sealing plate I and the sealing plate II, a first gas channel is formed between every two adjacent flow guide plates, the water cooling pipe II is located on the downstream of the first gas channel, and a second gas channel is formed between every two adjacent water cooling pipes II. A cavity is formed between the water cooling pipe II and the sealing plate II, the upstream of the hearth communicates with a gradually-expanding type premixing box, and a flow equalizing plate is fixedly connected into the gradually-expanding type premixing box. According to the utility model, stable airflow can be provided, the phenomena of backfire and blow-off are prevented, the combustion is more sufficient, and the emission of nitrogen oxides is reduced.

Description

Technical Field

[0001] This utility model relates to the field of boiler burner technology, and in particular to a hydrogen-fueled premixed combustion surface. Background Technology

[0002] In current burner technology, the structure and performance of the combustion surface play a crucial role in combustion efficiency. Traditional burners suffer from several shortcomings in their combustion surfaces: uneven combustion: With common flat combustion surfaces, fuel and air are difficult to mix fully and evenly during combustion, leading to incomplete combustion in some areas and low energy utilization. poor flame stability: Some existing combustion surface structures are prone to backfire and flameout when faced with airflow fluctuations and changes in fuel composition. high pollutant emissions: Incomplete combustion produces large amounts of harmful gases such as carbon monoxide. In some large boilers, unreasonable combustion surface design results in low combustion efficiency, wasting fuel and causing serious environmental pollution.

[0003] Therefore, developing a hydrogen-fuel premixed combustion surface is of great significance for improving combustion efficiency, enhancing flame stability, and reducing pollutant emissions. Utility Model Content

[0004] The purpose of this invention is to provide a hydrogen-fuel premixed combustion surface to solve the problems existing in the prior art, improve flame stability, and make combustion more complete.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a hydrogen-fuel premixed combustion surface, comprising:

[0006] The furnace comprises an upper chamber and a lower chamber, connected by a water-cooled pipe bank I and a water-cooled pipe bank II. Water-cooled pipe bank I includes several water-cooled pipes I, and water-cooled pipe bank II includes several water-cooled pipes II. The water-cooled pipes I and II are located within the furnace chamber. A sealing plate I, a sealing plate II, and two guide plates are fixedly connected to the outer wall of each water-cooled pipe I. The sealing plate I is located upstream of the sealing plate II. The two guide plates are fixedly connected between the sealing plate I and the sealing plate II, forming a first gas channel between two adjacent guide plates. The water-cooled pipe II is located downstream of the first gas channel, forming a second gas channel between two adjacent water-cooled pipes II. A cavity is formed between the water-cooled pipe II and the sealing plate II. A gradually expanding premixing tank is connected upstream of the furnace chamber, and a flow equalization plate is fixedly connected inside the gradually expanding premixing tank.

[0007] The present invention discloses the following technical effects: In the present invention, after the premixed combustible gas flow passes through the first gas channel, the cavity and the second gas channel, it encounters the annular bluff body formed by the water-cooling pipe II. After passing through the bluff body, the premixed combustible gas flow generates a backflow zone in the wake of the bluff body. The high-temperature gas of the backflow provides a continuous ignition source for the premixed gas, thereby forming a stable ignition ring at a certain position downstream of the bluff body, so that the high-speed premixed combustible gas begins to ignite and burn stably. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the premixed combustion surface structure of hydrogen fuel gas in this practical application;

[0010] Figure 2 for Figure 1 Schematic diagram of the A-direction structure;

[0011] Figure 3 for Figure 1 Schematic diagram of the B-direction structure;

[0012] Among them, 1. Water-cooled pipe I; 2. Water-cooled pipe II; 3. Sealing plate I; 4. Sealing plate II; 5. First gas channel; 6. Cavity; 7. Second gas channel; 8. Guide plate; 9. Upper chamber; 10. Water-cooled pipe row I; 11. Lower chamber; 12. Water-cooled pipe row II; 13. Flame; 14. Furnace chamber; 15. Gradual expansion premixing box; 16. Flow equalization plate. Detailed Implementation

[0013] 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.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Reference Figure 1-3 This utility model provides a hydrogen-fuel premixed combustion surface, comprising:

[0016] The upper chamber 9 and the lower chamber 11 are connected by water-cooled pipe bank I 10 and water-cooled pipe bank II 12. Water-cooled pipe bank I 10 includes several water-cooled pipes I 1, and water-cooled pipe bank II 12 includes several water-cooled pipes II 2. Water-cooled pipes I 1 and II 2 are located inside the furnace 14. Sealing plate I 3, sealing plate II 4 and two guide plates 8 are fixedly connected to the outer wall of water-cooled pipe I 1. Sealing plate I 3 is located upstream of sealing plate II 4. The two guide plates 8 are fixedly connected between sealing plate I 3 and sealing plate II 4. A first gas channel 5 is formed between two adjacent guide plates 8. Water-cooled pipe II 2 is located downstream of the first gas channel 5. A second gas channel 7 is formed between two adjacent water-cooled pipe II 2. A cavity 6 is formed between water-cooled pipe II 2 and sealing plate II 4. A gradually expanding premixing box 15 is connected upstream of the furnace 14. A flow equalization plate 16 is fixedly connected inside the gradually expanding premixing box 15.

[0017] The premixed combustible gas passes through the first gas channel 5 and then through the second gas channel 7 to ignite and burn, forming a stable flame 13. A single water-cooled pipe II2 forms an annular blunt body. The water-cooled pipe array I10 and the water-cooled pipe array II12 form a cavity. The water-cooled pipe I1, water-cooled pipe II2, upper box 9, and lower box 11 are all filled with cooling medium, which can reduce the temperature of the flame and suppress the generation of nitrogen oxides.

[0018] Air from the blower (not shown) mixes with gas from the gas pipeline (not shown) at the front of the reburner and enters the diffuser premixing box 15. After being evenly distributed by the flow equalization plate 16, it enters the first gas channel 5 of the combustion surface, then passes through the cavity 6 and the second gas channel 7 for ignition and combustion. The design of the water-cooled pipe II2 forms an annular bluff body. After the premixed combustible gas flows through the bluff body, a backflow zone is generated in the bluff body trail. The high-temperature backflow gas provides a continuous ignition source for the premixed gas, thereby forming a stable ignition ring at a certain position downstream of the bluff body, enabling the high-speed premixed combustible gas to start stable ignition and combustion. Figure 1 The combustion location is flame 13.

[0019] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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.

[0020] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A hydrogen-fuel premixed combustion surface, characterized in that, include: The upper chamber (9) and the lower chamber (11) are connected by a water-cooled pipe bank I (10) and a water-cooled pipe bank II (12). The water-cooled pipe bank I (10) includes several water-cooled pipes I (1), and the water-cooled pipe bank II (12) includes several water-cooled pipes II (2). The water-cooled pipes I (1) and II (2) are located inside the furnace (14). A sealing plate I (3), a sealing plate II (4), and two guide plates (8) are fixedly connected to the outer wall of the water-cooled pipe I (1). The sealing plate I (3) is located on the sealing plate II (4). Upstream, two guide plates (8) are fixedly connected between the sealing plate I (3) and the sealing plate II (4), forming a first gas channel (5) between two adjacent guide plates (8), the water-cooled pipe II (2) is located downstream of the first gas channel (5), forming a second gas channel (7) between two adjacent water-cooled pipes II (2), forming a cavity (6) between the water-cooled pipe II (2) and the sealing plate II (4), and a gradually expanding premixing box (15) is connected upstream of the furnace (14), and a flow equalization plate (16) is fixedly connected inside the gradually expanding premixing box (15).

Images