Hydrogen combustion backflow stable combustion premixed combustion surface

Abstract

The utility model discloses a kind of hydrogen combustion backflow steady combustion premixing combustion surface, including upper box and lower box, water cooling pipe row I, water cooling pipe row II, water cooling pipe row III and water cooling pipe row IV are communicated between upper box and lower box, water cooling pipe row I is located in the upstream of water cooling pipe row II, the upstream of water cooling pipe row I is provided with gradually expanding premixing box, flow uniforming plate is installed on gradually expanding premixing box, water cooling pipe row I includes several water cooling pipes I, water cooling pipe row II includes several water cooling pipes II, water cooling pipe row III includes several water cooling pipes III, water cooling pipe row IV includes several water cooling pipes IV, first gas passage is formed between the flow guide plate of two adjacent water cooling pipes I, water cooling pipe II is located in the downstream of first gas passage, second gas passage is formed between water cooling pipe II and V-shaped plate, third gas passage is formed between two adjacent water cooling pipes II.The utility model can prevent backfire, make flame burn more stable, simultaneously play the role of cooling to high-temperature flame, reduce the generation of nitrogen oxides.

Description

Technical Field

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

[0002] With rapid economic development, the demand for energy is increasing, and fossil fuels remain the primary energy source worldwide. However, the environmental problems they cause are becoming increasingly serious. Therefore, more and more clean energy sources are being widely used. Natural gas and hydrogen, as important clean energy sources, have characteristics such as being green, low-carbon, and clean. The combustion surface of the burner in a gas-fired boiler plays a crucial role in reducing pollutant formation. However, existing combustion surfaces generally suffer from problems such as instability, susceptibility to backfire, large flame length, low ejection velocity, increased furnace size and boiler volume, high flame temperature during combustion, and high nitrogen oxide emissions.

[0003] To address this issue, a hydrogen-fueled gas recirculation stable combustion premixed combustion surface is provided. Utility Model Content

[0004] The purpose of this invention is to provide a hydrogen-fuel gas recirculation stable premixed combustion surface to solve the problems existing in the prior art. It can form a high-speed, low-pressure stable combustion surface, which can make combustion more complete, reduce nitrogen oxide emissions, prevent backfire, and make combustion safer and more stable.

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

[0006] The furnace consists of an upper chamber and a lower chamber, connected by water-cooled pipe arrays I, II, III, and IV. Water-cooled pipe array I is located upstream of water-cooled pipe array II, water-cooled pipe array III is located downstream of water-cooled pipe array II, and water-cooled pipe array IV is located downstream of water-cooled pipe array III. These water-cooled pipe arrays are located within the furnace chamber, which is situated within the upper chamber. Between the main body and the lower box body, an expansion premixing box is provided upstream of the furnace. A flow equalization plate is installed in the expansion premixing box. The water-cooled pipe bank I includes several water-cooled pipes I, the water-cooled pipe bank II includes several water-cooled pipes II, the water-cooled pipe bank III includes several water-cooled pipes III, and the water-cooled pipe bank IV includes several water-cooled pipes IV. A rib is fixedly connected between the water-cooled pipes II and III, and the rib is fixedly connected between the water-cooled pipes III and IV.

[0007] A sealing plate, two guide plates, and a V-shaped plate are fixedly connected to the water-cooled pipe I. The guide plates are fixedly connected between the sealing plate and the V-shaped plate. A first gas channel is formed between two adjacent guide plates. The water-cooled pipe II is located downstream of the first gas channel. A second gas channel is formed between the water-cooled pipe II and the V-shaped plate. A third gas channel is formed between two adjacent water-cooled pipes II.

[0008] The present invention discloses the following technical effects: In this device, the sealing plate mainly separates the mixed gas, allowing the mixed gas to enter the first gas channel. Two adjacent V-shaped plates and the water-cooling pipe II form a cavity. The guide plate and V-shaped plate are designed at the front of the water-cooling pipe II, so that the outer wall of the water-cooling pipe II and the tail of the V-shaped plate form two airflow channels. This structural design can prevent backfire and reduce the generation of nitrogen oxides.

[0009] Water-cooled pipe II, two adjacent water-cooled pipes III, two adjacent water-cooled pipes IV, and their fins form independent combustion zones. The flame burns within these independent combustion zones. Simultaneously, the tail of the V-shaped plate forms a V-shaped blunt body, and a single water-cooled pipe II forms an annular blunt body. A backflow zone is generated in the trail of the blunt body. The high-temperature gas flowing back provides a continuous ignition source to the premixed gas, thereby forming a stable ignition ring at a certain position downstream of the blunt body, ensuring stable flame combustion and improving combustion efficiency. This invention can form a high-speed, low-pressure, and stable combustion surface, preventing backfire and making flame combustion more stable. It also cools the high-temperature flame, reducing the generation of nitrogen oxides. Attached Figure Description

[0010] 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.

[0011] Figure 1 This is a schematic diagram of the hydrogen fuel gas recirculation stable combustion premixed combustion surface structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of this utility model from direction A;

[0013] Figure 3 This is a schematic diagram of the structure of this utility model in direction B;

[0014] Figure 4 for Figure 1 Enlarged view of point a in the middle;

[0015] Figure 5 This is a schematic diagram of the structure of Embodiment 2;

[0016] Among them, 1. Water-cooled pipe I; 2. Water-cooled pipe II; 3. Sealing plate; 4. Guide plate; 5. First gas channel; 6. Cavity; 7. Second gas channel; 8. Third gas channel; 9. Upper chamber; 10. Water-cooled pipe row I; 11. Lower chamber; 12. Water-cooled pipe row II; 13. Flame; 14. Furnace chamber; 15. Gradually expanding premixing box; 16. Flow equalization plate; 17. Water-cooled pipe III; 18. Water-cooled pipe IV; 19. Rib; 20. V-shaped plate. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] Example 1

[0020] Reference Figure 1-3 This utility model provides a hydrogen-fueled fuel gas recirculation and stable combustion premixed combustion surface, comprising:

[0021] The upper chamber 9 and the lower chamber 11 are connected by water-cooled pipe banks I 10, II 12, III, and IV. Water-cooled pipe bank I 10 is located upstream of water-cooled pipe bank II 12, water-cooled pipe bank III is located downstream of water-cooled pipe bank II 12, and water-cooled pipe bank IV is located downstream of water-cooled pipe bank III. Water-cooled pipe banks I 10, II 12, III, and IV are located inside the furnace chamber 14, which is situated between the upper chamber 9 and the lower chamber 11. Between the bodies 11, a gradually expanding premixing box 15 is provided upstream of the furnace 14. A flow equalization plate 16 is installed inside the gradually expanding premixing box 15. The water-cooled pipe bank I 10 includes several water-cooled pipes I 1, the water-cooled pipe bank II 12 includes several water-cooled pipes II 2, the water-cooled pipe bank III includes several water-cooled pipes III 17, and the water-cooled pipe bank IV includes several water-cooled pipes IV 18. A rib 19 is fixedly connected between the water-cooled pipes II 2 and III 17, and a rib 19 is fixedly connected between the water-cooled pipes III 17 and IV 18.

[0022] A sealing plate 3, two guide plates 4 and a V-shaped plate 20 are fixedly connected to the water-cooled pipe I1. The guide plates 4 are fixedly connected between the sealing plate 3 and the V-shaped plate 20. A first gas channel 5 is formed between two adjacent guide plates 4. The water-cooled pipe II2 is located downstream of the first gas channel 5. A second gas channel 7 is formed between the water-cooled pipe II2 and the V-shaped plate 20. A third gas channel 8 is formed between two adjacent water-cooled pipes II2.

[0023] In this device, air from the blower (not shown in the figure) and gas from the gas pipeline (not shown in the figure) mix at the front of the burner and then enter the diffuser premixing box. After being evenly distributed by the flow equalization plate 16, it enters the first gas channel on the combustion surface, then passes through the cavity, is accelerated through the second gas channel, and finally is ignited and burned through the third gas channel. The sealing plate 3 mainly separates the mixed gas, allowing it to enter the first gas channel. Two adjacent V-shaped plates 20 and the water-cooled pipe II2 form the cavity 6. The guide plate 4 and the V-shaped plate 20 are designed at the front of the water-cooled pipe II2. This structural design allows the outer wall of the water-cooled pipe II2 and the tail of the V-shaped plate 20 to form two airflow channels. This structural design can prevent backfire and reduce nitrogen. The formation of oxides: Water-cooled pipe II2, two adjacent water-cooled pipes III17, two adjacent water-cooled pipes IV18 and their fins 19 form an independent combustion zone. The flame 13 burns in the independent combustion zone. At the same time, the tail of the V-shaped plate 20 forms a V-shaped blunt body. A single water-cooled pipe II2 forms an annular blunt body. A backflow zone is generated in the trail of the blunt body. The high-temperature gas of the backflow provides a continuous ignition source to the premixed gas, and then a stable ignition ring is formed at a certain position downstream of the blunt body, so that the flame burns stably, thereby improving the combustion efficiency. This utility model can form a high-speed, low-pressure, and stable combustion surface, prevent backfire, make the flame combustion more stable, and at the same time cool down the high-temperature flame, reducing the formation of nitrogen oxides.

[0024] The cavity 6 is designed to be gradually expanding. This structure can reduce the gas flow rate and increase the pressure. The design of the second gas channel can increase the gas flow rate and reduce the pressure. Since the high pressure flows to the low pressure, this design can prevent backfire.

[0025] Water in water-cooled pipe I1, water-cooled pipe II2, water-cooled pipe III17, and water-cooled pipe IV18 flows into the upper chamber 9 after being heated.

[0026] Advantages:

[0027] 1. The design of water-cooled pipe bank I10, water-cooled pipe bank II12, water-cooled pipe III17, and water-cooled pipe IV18 plays a role in cooling the sealing plate 3, the guide plate 4, the V-shaped plate 20, and the rib 19.

[0028] 2. The design of water-cooled tube bank I (10), water-cooled tube bank II (12), water-cooled tube bank III, and water-cooled tube bank IV can reduce the flame temperature, prevent backfire, reduce the generation of nitrogen oxides, and make the flame combustion more stable.

[0029] 3. The two adjacent water-cooled pipes II2, III17, and IV18 are connected by fins 19 to form an independent combustion space, which makes the flame combustion more stable and cools the high-temperature flame, reducing the generation of nitrogen oxides.

[0030] Example 2

[0031] Reference Figure 5 The difference between this embodiment and embodiment 1 is that the water-cooled pipe bank III, water-cooled pipe bank IV, and fin 19 are omitted.

[0032] 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.

[0033] 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-fueled fuel gas recirculation and stable combustion premixed combustion surface, characterized in that, include: The upper housing (9) and the lower housing (11) are connected by water-cooled pipe banks I (10), II (12), III, and IV. Water-cooled pipe banks I (10) are located upstream of water-cooled pipe banks II (12), III are located downstream of water-cooled pipe banks II (12), and IV are located downstream of water-cooled pipe banks III. Water-cooled pipe banks I (10), II (12), III, and IV are located inside the furnace chamber (14), which is located between the upper housing (9) and the lower housing (11). Between the bodies (11), a gradually expanding premixing box (15) is provided upstream of the furnace (14), a flow equalization plate (16) is installed in the gradually expanding premixing box (15), the water-cooled pipe bank I (10) includes a number of water-cooled pipes I (1), the water-cooled pipe bank II (12) includes a number of water-cooled pipes II (2), the water-cooled pipe bank III includes a number of water-cooled pipes III (17), the water-cooled pipe bank IV includes a number of water-cooled pipes IV (18), a rib (19) is fixedly connected between the water-cooled pipes II (2) and the water-cooled pipes III (17), and the rib (19) is fixedly connected between the water-cooled pipes III (17) and the water-cooled pipes IV (18); A sealing plate (3), two guide plates (4) and a V-shaped plate (20) are fixedly connected to the water-cooled pipe I (1). The guide plates (4) are fixedly connected between the sealing plate (3) and the V-shaped plate (20). A first gas channel (5) is formed between two adjacent guide plates (4). The water-cooled pipe II (2) is located downstream of the first gas channel (5). A second gas channel (7) is formed between the water-cooled pipe II (2) and the V-shaped plate (20). A third gas channel (8) is formed between two adjacent water-cooled pipes II (2).

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