Dual-fuel switching combustion burner
By designing a dual-fuel switching combustion burner, the problem that the vertical furnace and drying kiln can only use one fuel is solved, and flexible fuel switching and production cost control are achieved to ensure combustion stability and efficiency.
Patent Information
- Application Number
- CN202422128097.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing vertical furnace and drying kiln burners can only use one fuel (generator gas made from gas stations), resulting in an increase in production costs when fuel demand increases in winter.
A dual fuel switching combustion burner is designed, including combustion-assisted air, coal gas and natural gas areas. Eight groups of parallel air supply and gas supply structures are adopted to switch fuel through valves to ensure combustion stability and cost control.
It realizes flexible switching between natural gas and coal gas, reduces production costs, ensures consistent combustion chamber pressure, temperature and flow, and improves combustion efficiency and stability.
Smart Images
Figure CN223283069U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mineral and metallurgical equipment, and particularly relates to a dual-fuel switching combustion burner. Background Art
[0002] The existing vertical furnace and drying kiln burners used direct-flame multi-channel gas burners. The unit's vertical furnace fuel was producer gas from a gas station. Due to increased coal demand in winter, lump coal prices rose, leading to increased production costs. To reduce production costs during peak coal consumption periods, the unit incorporated local natural gas as a fuel for vertical furnace roasting, allowing the use of both coal gas and natural gas, thus reducing production costs.
[0003] Therefore, it is necessary to design a dual-fuel switching combustion burner and redesign the existing vertical furnace and drying kiln burners into a dual-fuel switching combustion structure to meet the switching combustion of coal gas or natural gas. Utility Model Content
[0004] In view of the problems of the prior art, the purpose of the present invention is to provide a dual-fuel switchable combustion burner to solve the problem of increased fuel demand in winter and the high production cost of using only generator gas produced by gas stations.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] The exhaust gas fan of the gas burner is connected with the exhaust gas fan of the gas burner, and the exhaust gas fan of the gas burner is connected with the exhaust gas fan of the gas burner.
[0007] More preferably, the combustion-supporting air inlet pipe is connected to the combustion-supporting air source pipe, and a valve is provided on the combustion-supporting air source pipe; the coal gas inlet pipe is connected to the coal gas source pipe, and a valve is provided on the gas source pipe; the natural gas inlet pipe is connected to the natural gas source pipe, and a valve is provided on the natural gas source pipe.
[0008] More preferably, the air outlet of the combustion-supporting air outlet duct is provided with a guide plate.
[0009] More preferably, a peephole end cover is provided at one end of the peephole, and a peephole cover is provided on the peephole end cover.
[0010] More preferably, a pipe fixing plate is provided at one end of the sleeve area.
[0011] More preferably, a natural gas pressure equalizing chamber end cover is provided on the natural gas pressure equalizing chamber.
[0012] More preferably, a flange is provided on the channel, the flange is connected to the combustion chamber, and flange reinforcement ribs are provided around the flange.
[0013] More preferably, a flame detection hole fixing plate is provided on the flange, and a flame detection hole is provided on the flame detection hole fixing plate.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. This utility model provides a dual-fuel switchable combustion burner. During normal production, when natural gas and coal gas are burned as fuel, the combustion chamber pressure, temperature, flow rate and other data are the same, meeting production requirements. This utility model can switch fuel media at any time according to fluctuations in coal and natural gas prices, effectively controlling production costs.
[0016] 2. This utility model's dual-fuel burner utilizes a direct-flame air and gas supply structure with minimal resistance. Eight parallel air and gas supply structures and dispersed air and gas supply channels facilitate stable combustion. Guide vanes are used at the combustion-supporting air outlet to increase outlet airflow velocity, improve air and gas mixing efficiency, and ensure complete combustion. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a cross-sectional view of the utility model;
[0018] Figure 2 It is a left view of the utility model;
[0019] Figure 3 It is a right side view of the utility model;
[0020] The meanings of the accompanying symbols are as follows: 1. Combustion-supporting air inlet duct; 2. Combustion-supporting air pressure equalizing chamber; 3. Combustion-supporting air outlet duct; 4. Guide plate; 5. Gas inlet duct; 6. Gas pressure equalizing chamber; 7. Gas branch pipe; 8. Gas outlet duct; 9. Natural gas inlet duct; 10. Natural gas pressure equalizing chamber; 11. Natural gas branch pipe; 12. Natural gas outlet duct; 13. Peephole cover; 14. Peephole end cover; 15. Peephole; 16. Pipe fixing plate; 17. Natural gas pressure equalizing chamber end cover; 18. Flame detection hole; 19. Flame detection hole fixing plate; 20. Flange; 21. Flange reinforcement plate. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0023] like Figure 1-3As shown, a dual-fuel switching combustion burner includes a combustion air area, a coal gas area, a natural gas area and a casing area. The combustion air area includes a combustion air inlet duct 1, which is connected to one end of a combustion air equalizing chamber 2, and the other end of the combustion air equalizing chamber 2 is connected to a combustion air outlet duct 3. The combustion air outlet duct 3 is provided with a guide vane 4. The guide vane 4 can increase the air flow velocity at the outlet, improve the mixing efficiency of air and combustion medium, and ensure sufficient combustion. The coal gas area includes a coal gas inlet duct 5, which is connected to one end of a coal gas equalizing chamber 6, and the other end of the coal gas equalizing chamber 6 is connected to one end of a coal gas branch pipe 7, and the other end of the coal gas branch pipe 7 is connected to a coal gas outlet pipe 8. The natural gas area includes a natural gas inlet pipe 9, which is connected to one end of a natural gas equalizing chamber 10, and the other end of the natural gas equalizing chamber 10 is connected to one end of a natural gas branch pipe 11, and the other end of the natural gas branch pipe 11 is connected to a natural gas outlet pipe 12. There are 8 channels in the casing area, and the central part of the 8 channels is a peephole 15. A peephole end cap 14 is provided at one end of the peephole 15, and a peephole cover 13 is provided on the peephole end cap 14, so that the working status of the fluid (object) can be directly observed. Each channel is a natural gas pipeline, a coal gas pipeline and a combustion-supporting air pipeline from the inside to the outside. Because natural gas has a high calorific value and a small amount, its pipeline diameter is also smaller than the coal gas inlet pipeline. Therefore, its natural gas branch pipeline 11 is sheathed in the coal gas branch pipeline 7, and eight groups of parallel air supply and gas supply structures are adopted. The dispersed air supply and gas supply channels are conducive to stable combustion.
[0024] The combustion-supporting air inlet duct 1 is connected to the combustion-supporting air source duct, and a valve is provided on the combustion-supporting air source duct. The coal gas inlet duct 5 is connected to the coal gas source duct, and a valve is provided on the coal gas source duct. The natural gas inlet duct 9 is connected to the natural gas source duct, and a valve is provided on the natural gas source duct. The transmission of the combustion-supporting air and the switching of the combustion medium are achieved by opening and closing the valve. The natural gas pressure equalizing chamber 10 is provided with a natural gas pressure equalizing chamber end cover 17, which can protect the equipment from the influence of the external environment and prevent the leakage of internal natural gas. A pipe fixing plate 16 is provided at one end of the casing area for fixing the casing channel. A flange 20 is provided on the channel, and the flange 20 is connected to the combustion chamber. The burner is connected to the combustion chamber through the flange 20. Flange reinforcing ribs 21 are provided around the flange 20 to improve the stability of the flange 20. A flame detection hole fixing plate 19 is provided on the flange 20, and a flame detection hole 18 is provided on the flame detection hole fixing plate 19. The flame detection hole 18 is connected to the pipe of the flame detector.
[0025] During installation, the prepared gas distribution pipes 7 are placed within the combustion air outlet pipes 3 for alignment and fixation, while the combustion air area burner shell is welded. After welding, the eight prepared natural gas distribution pipes 11 are placed within the gas distribution pipes 7 for alignment and fixation. The gas area burner shell is welded to ensure that the combustion air outlet, gas outlet, and natural gas outlet are all on the same horizontal plane. The guide vanes 4 are then welded to the outlets. The peephole 15 is placed in the center of the burner for alignment and fixation, with the inside of the peephole 15 80mm shorter than the air and gas outlets. The natural gas area burner shell is welded, and the natural gas pressure equalization chamber end cap 17, peephole end cap 14, and peephole cover 13 are installed one by one. Finally, the pipe fixing plate 16 and flange 20 are welded to complete the dual-fuel burner. Taking advantage of the downtime of the vertical furnace for maintenance, the gas burners in the vertical furnace combustion chamber and on the top of the drying kiln are replaced and installed one by one. Finally, the flame detection hole 18 and the flame detection hole fixing plate 19 are installed, and the combustion-supporting air source pipeline, the gas source pipeline, the natural gas source pipeline and the flame detector are connected.
[0026] When the utility model is used, the valve of the combustion-supporting air source pipeline connected to the combustion-supporting air inlet pipeline 1 is opened to deliver the combustion-supporting air. When the price of natural gas is higher than the price of lump coal, the valve of the gas source pipeline connected to the gas inlet pipeline 5 is opened, and the generator gas is used for combustion. The generator gas passes through the gas inlet pipeline 5, the gas pressure equalizing chamber 6, one end of the gas branch pipeline 7 and the gas outlet pipeline 8 in sequence, and finally enters the combustion chamber for combustion. When the price of lump coal is higher than the price of natural gas, the valve of the natural gas source pipeline connected to the natural gas inlet pipeline 9 is opened, and natural gas is used for combustion. The natural gas passes through the natural gas inlet pipeline 9, the natural gas pressure equalizing chamber 10, the natural gas branch pipeline 11 and the natural gas outlet pipeline 12 in sequence, and finally enters the combustion chamber for combustion.
[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A dual-fuel switchable combustion burner, comprising a combustion air area, a coal gas area, a natural gas area and a casing area, characterized in that: The combustion-supporting air area includes a combustion-supporting air inlet pipe (1), the combustion-supporting air inlet pipe (1) is connected to one end of the combustion-supporting air equalizing chamber (2), and the other end of the combustion-supporting air equalizing chamber (2) is connected to the combustion-supporting air outlet pipe (3); the gas area includes a gas inlet pipe (5), the gas inlet pipe (5) is connected to one end of the gas equalizing chamber (6), the other end of the gas equalizing chamber (6) is connected to one end of the gas branch pipe (7), and the other end of the gas branch pipe (7) is connected to the gas outlet pipe (8). The natural gas area includes a natural gas inlet pipeline (9), the natural gas inlet pipeline (9) is connected to one end of the natural gas pressure equalizing chamber (10), the other end of the natural gas pressure equalizing chamber (10) is connected to one end of the natural gas branch pipeline (11), and the other end of the natural gas branch pipeline (11) is connected to the natural gas outlet pipeline (12); the casing area is provided with 8 channels, the central part of the 8 channels is a peephole (15), and each channel is a natural gas pipeline, a coal gas pipeline and a combustion air pipeline from the inside to the outside.
2. The dual-fuel switchable combustion burner according to claim 1, characterized in that: The combustion-supporting air inlet pipe (1) is connected to the combustion-supporting air source pipe, and a valve is provided on the combustion-supporting air source pipe; the coal gas inlet pipe (5) is connected to the coal gas source pipe, and a valve is provided on the coal gas source pipe; the natural gas inlet pipe (9) is connected to the natural gas source pipe, and a valve is provided on the natural gas source pipe.
3. The dual-fuel switchable combustion burner according to claim 1, characterized in that: The air outlet of the combustion-supporting air outlet duct (3) is provided with a guide plate (4).
4. The dual-fuel switchable combustion burner according to claim 1, characterized in that: A peephole end cover (14) is provided at one end of the peephole (15), and a peephole cover (13) is provided on the peephole end cover (14).
5. The dual-fuel switchable combustion burner according to claim 1, characterized in that: A pipeline fixing plate (16) is provided at one end of the sleeve region.
6. The dual-fuel switchable combustion burner according to claim 1, characterized in that: The natural gas pressure equalizing chamber (10) is provided with a natural gas pressure equalizing chamber end cover (17).
7. The dual-fuel switchable combustion burner according to claim 1, characterized in that: A flange (20) is provided on the channel, the flange (20) is connected to the combustion chamber, and flange reinforcement ribs (21) are provided around the flange (20).
8. The dual-fuel switchable combustion burner according to claim 7, characterized in that: A flame detection hole fixing plate (19) is provided on the flange (20), and a flame detection hole (18) is provided on the flame detection hole fixing plate (19).