A mixed combustion burner assembly and coal-ammonia mixed combustion device
By introducing a distribution plate, a trapezoidal combustion bracket, and a mesh plate design into the burner, the problems of uneven fuel mixing and low combustion efficiency during coal-ammonia co-combustion are solved, achieving efficient and safe operation of the burner.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWERCHINA JIANGXI ELECTRIC POWER ENGINEERING CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-29
Smart Images
Figure CN224302089U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of co-combustion devices, and in particular to a co-combustion burner assembly and a coal-ammonia co-combustion device. Background Technology
[0002] Against the backdrop of accelerated global energy structure transformation and increasingly stringent environmental policies, traditional coal-fired power generation technology faces enormous challenges. As a traditional energy source, coal combustion produces large amounts of pollutants such as carbon dioxide, sulfur dioxide, and nitrogen oxides, causing severe environmental pollution and exacerbating global warming. In response to the "dual-carbon" goal, finding clean and efficient alternative energy sources and optimizing combustion technologies is urgently needed.
[0003] Ammonia, as a promising zero-carbon fuel, produces mainly nitrogen and water upon combustion, without generating carbon dioxide, and has received widespread attention in the energy sector in recent years. Co-firing ammonia with coal can reduce pollutant emissions from coal combustion and make full use of existing coal infrastructure, making it a highly promising transitional energy solution. However, existing coal-fired burners are structurally designed to meet the specific requirements of coal-ammonia co-firing, resulting in problems such as uneven fuel mixing, low combustion efficiency, and poor combustion stability. Ordinary burners cannot achieve proper stratification and efficient contact between coal and ammonia within the combustion chamber, leading to incomplete combustion and low energy utilization. Utility Model Content
[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides a co-combustion burner assembly and a coal-ammonia co-combustion device.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] This utility model discloses a co-combustion burner assembly and a coal-ammonia co-combustion device, comprising:
[0007] Support frame, with supports installed on the ground;
[0008] The combustion furnace is fixedly installed on the support frame. The combustion furnace is equipped with a combustion chamber and a feeding port.
[0009] The heat-conducting cylinder is vertically installed inside the support frame;
[0010] Multiple material distribution plates are arranged in a ring on the outer wall of the heat conduction cylinder, and the material distribution plates are connected to the inner wall of the combustion furnace.
[0011] Multiple primary combustion brackets are arranged in a trapezoidal shape, and each primary combustion bracket is arranged circumferentially on the outer wall of the heat conduction cylinder. The primary combustion brackets are located below the material distribution plate.
[0012] Multiple secondary combustion mesh plates are arranged in a trapezoidal shape on the outer wall of the heat conduction cylinder. The secondary combustion mesh plates are located below the primary combustion bracket, and the aperture of the secondary combustion mesh plates is smaller than that of the primary combustion bracket.
[0013] Ash discharge hopper, connected to the bottom end of the combustion furnace, is used to discharge slag;
[0014] The slag receiving assembly is located below the ash discharge hopper and is used to receive the slag discharged from the ash discharge hopper.
[0015] Furthermore, the slag receiving assembly includes:
[0016] Two guide brackets are arranged parallel to each other at the bottom of the support frame;
[0017] The ash receiving cylinder is horizontally slidably mounted on two guide supports. When the ash receiving cylinder slides to the bottom of the ash discharge hopper, it connects with the ash discharge hopper.
[0018] Furthermore, a guide block is provided at the bottom of the ash receiving cylinder, and the guide block is slidably positioned between two guide supports.
[0019] Furthermore, multiple ball bearings are rolled at the bottom of the ash receiving cylinder, and each ball bearing is supported on two guide brackets.
[0020] Furthermore, a positioning plate is provided at the bottom of the ash discharge hopper for positioning the ash cylinder.
[0021] Furthermore, an observation room is connected to the support frame, and the observation room is equipped with heat-insulating glass.
[0022] Furthermore, the observation chamber is equipped with a crank handle for rotating inserts, and a heat insulation baffle is installed on the crank handle. The heat insulation baffle is oscillating within the observation chamber.
[0023] Furthermore, an exhaust valve is installed at the bottom of the observation chamber.
[0024] In the above technical solution, the co-combustion burner assembly and coal-ammonia co-combustion device provided by this utility model have the following beneficial effects:
[0025] The feeding plate guides and disperses the fuel during the feeding process, allowing coal and ammonia to initially disperse upon entering the combustion chamber. This facilitates further mixing of the fuel within the combustion chamber, addressing the issue of conventional burners failing to achieve proper stratification and efficient contact between coal and ammonia. It also improves the uniformity of fuel mixing, creating favorable conditions for complete combustion. The trapezoidal circumferential arrangement of the primary combustion support and secondary combustion mesh, along with the smaller aperture of the secondary combustion mesh compared to the primary combustion support, enables staged combustion. Coal undergoes initial combustion on the primary combustion support, while unburned particles are further burned on the secondary combustion mesh. This increases the contact time and area between the fuel and air, effectively solving the problems of incomplete combustion and low energy utilization in conventional burners, significantly improving combustion efficiency. The ash hopper and slag receiving assembly ensure timely and smooth discharge and proper collection of slag generated during combustion, preventing slag accumulation and blockage, reducing the impact on normal furnace operation, lowering the difficulty and cost of subsequent cleaning, and minimizing slag pollution to the surrounding environment. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the embodiments will be briefly described below.
[0027] Figure 1 This is a schematic diagram of the structure of this utility model;
[0028] Figure 2 This is a schematic diagram of the internal structure of the combustion furnace;
[0029] Figure 3 This is a partially enlarged structural diagram of the primary combustion bracket and the secondary combustion mesh plate;
[0030] Figure 4 This is a schematic diagram of the ash collection cylinder installation structure;
[0031] Figure 5 This is an enlarged structural diagram of the observation room and its components;
[0032] The following are labels in the attached diagram: 1. Support frame; 11. Combustion furnace; 12. Heat conduction cylinder; 13. Material distribution plate; 14. Primary combustion bracket; 15. Secondary combustion mesh plate; 16. Ash discharge hopper; 1a. Observation room; 1b. Insulated glass; 1c. Handle; 1d. Insulated baffle; 1e. Exhaust valve; 21. Guide slide bracket; 22. Ash receiving cylinder; 23. Guide block; 24. Ball bearing; 25. Positioning plate. Detailed Implementation
[0033] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0034] See Figure 1-5 As shown;
[0035] An embodiment of the present invention provides a co-combustion burner assembly and a coal-ammonia co-combustion device, comprising:
[0036] Support frame 1, the support is set on the ground;
[0037] The combustion furnace 11 is fixedly installed on the support frame 1. The combustion furnace 11 has a combustion chamber inside and a feeding port on the combustion furnace 11.
[0038] The heat-conducting cylinder 12 is vertically installed inside the support frame 1;
[0039] Multiple material distribution plates 13 are arranged in a ring on the outer wall of the heat conduction cylinder 12, and the material distribution plates 13 are connected to the inner wall of the combustion furnace 11.
[0040] Multiple primary combustion brackets 14 are configured in a trapezoidal shape. Each primary combustion bracket 14 is arranged circumferentially on the outer wall of the heat conduction cylinder 12. The primary combustion brackets 14 are located below the material distribution plate 13.
[0041] Multiple secondary combustion mesh plates 15 are configured in a trapezoidal shape. Each secondary combustion mesh plate 15 is arranged circumferentially on the outer wall of the heat conduction cylinder 12. The secondary combustion mesh plates 15 are located below the primary combustion bracket 14. The aperture of the secondary combustion mesh plate 15 is smaller than that of the primary combustion bracket 14.
[0042] Ash discharge hopper 16 is connected to the bottom end of combustion furnace 11 and is used to discharge slag;
[0043] The slag receiving assembly is located below the ash discharge hopper 16 and is used to receive the slag discharged from the ash discharge hopper 16.
[0044] By adopting the above technical solution, coal and ammonia are added to the combustion chamber inside the combustion furnace 11 in a certain proportion and manner through the feeding port provided on the combustion furnace 11. The distribution plate 13 is arranged in a ring on the outer wall of the heat conduction cylinder 12 and connected to the inner wall of the combustion furnace 11. During the feeding process, the distribution plate 13 can guide and disperse the added fuel, so that the coal and ammonia are initially dispersed to a certain extent after entering the combustion chamber, creating favorable conditions for subsequent mixing and combustion. The coal and ammonia begin to burn initially in the combustion chamber. Since the primary combustion bracket 14 is set in a trapezoidal shape and arranged circumferentially on the outer wall of the heat conduction cylinder 12, located below the distribution plate 13, the coal particles will first fall onto the primary combustion bracket 14. The primary combustion support 14 provides a relatively large support area for the coal, which is beneficial for coal accumulation and initial combustion. Simultaneously, ammonia and coal begin to contact and react in the primary combustion support 14 area. After initial combustion in the primary combustion support 14, some unburned coal particles and combustion products continue to fall, reaching the secondary combustion mesh plate 15 area. The secondary combustion mesh plate 15 is also trapezoidal and circumferentially arranged on the outer wall of the heat-conducting cylinder 12, located below the primary combustion support 14. It provides some interception and support for unburned coal particles, allowing them to continue to burn fully in the secondary combustion mesh plate 15 area, improving combustion efficiency. The slag produced during combustion gradually falls, passing through a connecting device... Ash discharge is discharged through the ash hopper 16 located at the bottom of the combustion furnace 11; the ash receiving assembly located below the ash hopper 16 can promptly receive the discharged ash, preventing ash from polluting the surrounding environment, and also facilitating subsequent ash processing and recycling; the feed plate 13 guides and disperses the fuel during the feeding process, allowing coal and ammonia to initially disperse after entering the combustion chamber, which helps further mixing of the fuel in the combustion chamber, improving the problem that ordinary burners cannot achieve reasonable stratification and efficient contact of coal and ammonia in the combustion chamber, improving the uniformity of fuel mixing, and creating favorable conditions for complete combustion; the trapezoidal circumferential arrangement design of the primary combustion bracket 14 and the secondary combustion mesh plate 15, and the aperture of the secondary combustion mesh plate 15 The structural feature of the smaller aperture of the primary combustion bracket 14 allows for staged combustion of fuel during combustion. Coal first undergoes preliminary combustion on the primary combustion bracket 14, and unburned particles are then further burned on the secondary combustion mesh plate 15. This increases the contact time and area between the fuel and air, effectively solving the problems of incomplete combustion and low energy utilization in ordinary burners, and significantly improving combustion efficiency. The ash discharge hopper 16 and slag receiving assembly ensure that the slag generated during combustion can be discharged promptly and smoothly and properly received, avoiding problems such as slag accumulation and blockage, reducing the impact on the normal operation of the combustion furnace, and also reducing the difficulty and cost of subsequent cleaning work, as well as reducing the pollution of the surrounding environment by slag.
[0045] As a preferred embodiment of the above technical solution, such as Figure 2As shown, the slag receiving assembly includes:
[0046] Two guide brackets 21 are arranged in parallel at the bottom of the support frame 1;
[0047] The ash receiving cylinder 22 is horizontally slidably mounted on two guide slide supports 21. When the ash receiving cylinder 22 slides to the bottom of the ash discharge hopper 16, it connects with the ash discharge hopper 16.
[0048] In this embodiment, when the slag in the combustion furnace 11 accumulates to a certain level and needs to be discharged, the worker slides the ash receiving cylinder 22 horizontally along two parallel guide supports 21. Since the guide supports 21 provide a stable sliding track for the ash receiving cylinder 22, it can move smoothly and steadily. As the ash receiving cylinder 22 slides, it gradually approaches the ash discharge hopper 16. When the ash receiving cylinder 22 slides to the bottom of the ash discharge hopper 16, its opening precisely connects with the outlet of the ash discharge hopper 16, forming a complete slag discharge channel. At this time, the slag in the combustion furnace 11 is smoothly discharged into the ash receiving cylinder 22 through the ash discharge hopper 16. The ash receiving cylinder 22 continuously receives the discharged slag until the slag is completely discharged. After the slag discharge is completed, the worker slides the ash receiving cylinder 22 in the opposite direction along the guide supports 21, returning it to its initial position for further processing. Subsequent slag handling operations: The ash receiving cylinder 22 connects to the ash discharge hopper 16 via a horizontal sliding mechanism, making operation simple and convenient. It can quickly and accurately receive the slag discharged from the ash discharge hopper 16, preventing slag from scattering or leaking during discharge and improving the efficiency of slag receiving. The guide support 21 allows the ash receiving cylinder 22 to slide horizontally as needed, facilitating connection with the ash discharge hopper 16 when slag needs to be received, and keeping it away from the ash discharge hopper 16 when not in use, providing space for other operations or maintenance and enhancing the flexibility of the entire coal-ammonia co-firing unit. The ash receiving cylinder 22 can collect slag centrally. When full, it can be easily removed from the guide support 21 for slag transfer and processing, making the slag handling process more efficient and orderly, and reducing the workload and difficulty of manual slag cleaning.
[0049] As a preferred embodiment of the above technical solution, such as Figure 4 As shown, a guide block 23 is provided at the bottom of the ash receiving cylinder 22, and the guide block 23 is slidably disposed between two guide brackets 21;
[0050] In this embodiment, the guide block 23 slides between the two guide supports 21, providing stable support and guidance for the movement of the ash receiving cylinder 22. This prevents the ash receiving cylinder 22 from tilting, shaking, or deviating from the track during the sliding process, ensuring that the ash receiving cylinder 22 can move smoothly and accurately, thus improving the stability of the entire slag receiving process. Through the precise guidance of the guide block 23, the ash receiving cylinder 22 can accurately move to the bottom of the ash discharge hopper 16 and connect with it, ensuring that the slag can be discharged smoothly and completely into the ash receiving cylinder 22. This avoids slag leakage or scattering caused by inaccurate connection, improving the efficiency and quality of slag receiving. The design of the guide block 23 makes the movement of the ash receiving cylinder 22 smoother and easier, allowing workers to more conveniently connect and disconnect the ash receiving cylinder 22 from the ash discharge hopper 16, reducing the difficulty of operation and labor intensity, and improving work efficiency.
[0051] As a preferred embodiment of the above technical solution, such as Figure 4 As shown, multiple ball bearings 24 are rolled at the bottom of the ash receiving cylinder 22, and each ball bearing 24 is rolled and supported on two guide brackets 21.
[0052] In this embodiment, the rolling friction between the ball bearing 24 and the guide bracket 21 is much smaller than the sliding friction. This greatly reduces the resistance encountered by the ash receiving cylinder 22 during movement, allowing workers to push or pull the ash receiving cylinder 22 more easily, reducing operational difficulty and labor intensity, and improving work efficiency. The rolling support of the ball bearing 24 ensures that the ash receiving cylinder 22 remains stable during movement, avoiding shaking or jamming caused by uneven sliding friction. This helps ensure that the ash receiving cylinder 22 can accurately dock with the ash discharge hopper 16, improving the accuracy and stability of the slag receiving process. Due to the rolling support of the ball bearing 24, the wear between the ash receiving cylinder 22 and the guide bracket 21 is greatly reduced. This not only extends the service life of the ash receiving cylinder 22 and the guide bracket 21, reducing equipment maintenance and replacement costs, but also ensures the long-term stable operation of the entire slag receiving assembly.
[0053] As a preferred embodiment of the above technical solution, such as Figure 4 As shown, a positioning plate 25 is provided at the bottom of the ash discharge hopper 16 for positioning the ash cylinder 22.
[0054] In this embodiment, the positioning plate 25 provides a clear positioning reference for the ash receiving cylinder 22, ensuring that the ash receiving cylinder 22 accurately docks with the ash discharge hopper 16. This avoids the problem of inaccurate docking of the ash receiving cylinder 22 and the ash discharge hopper 16 due to errors in manual operation or movement, effectively preventing slag leakage or scattering, and improving the efficiency and quality of slag receiving. During the docking process of the ash receiving cylinder 22 and the ash discharge hopper 16, the positioning plate 25 plays a role in stabilizing support and positioning, ensuring that the ash receiving cylinder 22 remains stable at the moment of docking, without shaking or shifting. This helps to ensure the smooth progress of the entire slag receiving process and improves the stability and reliability of the operation. With the positioning function of the positioning plate 25, the staff does not need to spend too much time and effort to adjust the position of the ash receiving cylinder 22; they only need to push the ash receiving cylinder 22 to make it contact the positioning plate 25 to complete the docking. This greatly simplifies the operation process, reduces the difficulty of operation, and improves work efficiency.
[0055] As a preferred embodiment of the above technical solution, such as Figure 1 and Figure 5 As shown, an observation chamber 1a is connected to the support frame 1, and an insulated glass 1b is installed on the observation chamber 1a.
[0056] In this embodiment, the heat-insulating glass 1b allows staff to observe the coal-ammonia co-combustion situation inside the combustion furnace 11 in real time and intuitively. This helps to promptly identify problems during the combustion process, enabling quick adjustments to ensure the stability and safety of the combustion process. Through the observation room 1a and the heat-insulating glass 1b, staff can monitor the combustion status in a relatively safe environment without direct contact with the high-temperature combustion furnace 11. This provides great convenience for operators, allowing them to adjust combustion parameters promptly and accurately based on the combustion situation, optimize the combustion process, and improve combustion efficiency and energy utilization. The heat-insulating glass 1b has excellent heat insulation properties, effectively preventing the high-temperature heat generated by combustion from being transferred outside the observation room 1a, providing a safe observation environment for staff and ensuring their safety.
[0057] As a preferred embodiment of the above technical solution, such as Figure 5 As shown, a crank handle 1c is rotatably installed on the observation chamber 1a, and a heat insulation baffle 1d is installed on the crank handle 1c. The heat insulation baffle 1d is swung in the observation chamber 1a. The heat insulation baffle 1d is used for heat insulation. When observation is required, the heat insulation baffle 1d should be swung to remove the shielding state before observation can be carried out.
[0058] In this embodiment, the heat insulation baffle 1d is in a shielding state in the initial state and at the end of the observation, which can effectively block the high temperature heat in the combustion furnace 11 from being transferred to the outside of the observation chamber 1a; it helps to reduce the temperature of the surrounding environment of the observation chamber 1a, reduce the heat radiation impact on surrounding equipment and personnel, and ensure the normal operation of equipment and the safety of personnel; by turning the crank 1c to control the swing of the heat insulation baffle 1d, the staff can flexibly choose the observation time according to actual needs; when observation is not required, the heat insulation baffle 1d remains shielded, reducing heat loss and potential safety risks; when observation is required, the observation channel can be quickly opened, making it convenient for staff to understand the combustion situation in a timely manner.
[0059] As a preferred embodiment of the above technical solution, such as Figure 5 As shown, an exhaust valve 1e is connected to the bottom of the observation chamber 1a;
[0060] In this embodiment, during the coal-ammonia co-combustion process, a large amount of flue gas will be generated in the combustion furnace 11 and may enter the observation chamber 1a, causing the pressure in the observation chamber 1a to rise. The exhaust valve 1e can discharge the excess gas in the observation chamber 1a in a timely manner, maintain the pressure stability in the observation chamber 1a, avoid damage to the observation chamber 1a and its related components due to excessive pressure, and ensure the safe operation of the device.
[0061] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A co-combustion burner assembly and a coal-ammonia co-combustion device, characterized in that, include: Support frame, with supports installed on the ground; A combustion furnace is fixedly installed on the support frame. The combustion furnace has a combustion chamber inside and a feeding port on the combustion furnace. The heat-conducting cylinder is vertically installed inside the support frame; Multiple material distribution plates are arranged in a ring on the outer wall of the heat-conducting cylinder, and the material distribution plates are connected to the inner wall of the combustion furnace. Multiple primary combustion brackets are configured in a trapezoidal shape, and each primary combustion bracket is arranged circumferentially on the outer wall of the heat-conducting cylinder. The primary combustion brackets are located below the material distribution plate. Multiple secondary combustion mesh plates are configured in a trapezoidal shape. Each of the secondary combustion mesh plates is arranged circumferentially on the outer wall of the heat-conducting cylinder. The secondary combustion mesh plates are located below the primary combustion bracket. The aperture of the secondary combustion mesh plates is smaller than that of the primary combustion bracket. An ash discharge hopper is connected to the bottom end of the combustion furnace and is used to discharge slag. A slag receiving assembly is located below the ash discharge hopper and is used to receive the slag discharged from the ash discharge hopper.
2. The co-combustion burner assembly and coal-ammonia co-combustion device as described in claim 1, characterized in that, The slag receiving assembly includes: Two guide slide brackets are arranged in parallel at the bottom of the support frame; The ash receiving cylinder is horizontally slidably mounted on the two guide brackets. When the ash receiving cylinder slides to the bottom of the ash discharge hopper, it connects with the ash discharge hopper.
3. The co-combustion burner assembly and coal-ammonia co-combustion device as described in claim 2, characterized in that, The bottom end of the ash receiving cylinder is provided with a guide block, which is slidably disposed between the two guide brackets.
4. The co-combustion burner assembly and coal-ammonia co-combustion device as described in claim 2, characterized in that, The bottom end of the ash receiving cylinder is provided with multiple rolling balls, and each of the rolling balls is supported on two guide brackets.
5. The co-combustion burner assembly and coal-ammonia co-combustion device as described in claim 2, characterized in that, The bottom of the ash discharge hopper is provided with a positioning plate for positioning the ash receiving cylinder.
6. The co-combustion burner assembly and coal-ammonia co-combustion device as described in claim 1, characterized in that, An observation room is connected to the support frame, and the observation room is equipped with heat-insulating glass.
7. The co-combustion burner assembly and coal-ammonia co-combustion device as described in claim 6, characterized in that, The observation chamber is equipped with a rotating handle, and the handle is fitted with a heat insulation baffle, which is oscillating within the observation chamber.
8. The co-combustion burner assembly and coal-ammonia co-combustion device as described in claim 6, characterized in that, An exhaust valve is connected to the bottom of the observation room.