Full-membrane wall combustion hearth structure with water-cooled fire grate

Abstract

The utility model relates to the technical field of boilers, in particular to a full-membrane wall combustion hearth structure with a water-cooled grate, which comprises a header component and a membrane water-cooled wall, the header component forms a hearth frame, the membrane water-cooled wall forms a hearth side wall, the header component comprises four headers, the membrane water-cooled wall comprises six groups of tube bundles, and the tube bundles are arranged in the hearth frame. And a combustion interface is arranged at the front part of the membrane water-cooled wall. According to the full-membrane wall combustion hearth structure with the water-cooled fire grate, the combustion efficiency and the heat utilization rate of a boiler are remarkably improved by innovatively designing the combination form of the header assembly and the membrane water-cooled wall. According to the structure, the sealing performance of the hearth is optimized, heat loss is effectively reduced, the fuel adaptability is enhanced, and the boiler can flexibly meet the combustion requirements of various fuels. Through reasonable arrangement of structures such as the combustion connector, the inspection hole and the tail gas exhaust port, the operation stability and maintainability of the boiler are improved, the operation cost is reduced, and the practicability and economical efficiency of the boiler are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, and more specifically, to a full membrane wall combustion furnace structure with a water-cooled grate. Background Art

[0002] In the technical field of boilers, as a core component, the structure and performance of the combustion furnace directly affect the combustion efficiency and heat utilization rate of the boiler.

[0003] Traditional furnace structures, such as layer combustion, chamber combustion, and fluidized bed combustion, although meeting the combustion requirements to a certain extent, generally have problems such as low combustion thermal efficiency, poor fuel adaptability, and serious heat loss. These traditional furnaces often can only be designed for specific fuels, the combustion equipment needs to be customized, and the related auxiliary equipment is complex and cumbersome, which not only increases the operation cost but also limits the flexibility and practicality of the boiler. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a full membrane wall combustion furnace structure with a water-cooled grate to solve the problems in the above background art that traditional furnace structures, such as layer combustion, chamber combustion, and fluidized bed combustion, although meeting the combustion requirements to a certain extent, generally have problems such as low combustion thermal efficiency, poor fuel adaptability, and serious heat loss.

[0005] To achieve the above purpose, the utility model provides a full membrane wall combustion furnace structure with a water-cooled grate, including a header assembly and a membrane water wall. The header assembly forms the furnace frame, and the membrane water wall forms the furnace side walls. The header assembly includes four headers, the membrane water wall includes six tube rows, a combustion interface is arranged at the front of the membrane water wall, a plurality of inspection holes are arranged on one outer wall of the membrane water wall, and an exhaust gas discharge port is arranged at the rear of the membrane water wall.

[0006] Preferably, the header assembly includes an upper left header, an upper right header, a lower left header, and a lower right header.

[0007] Preferably, the membrane water wall includes a left side membrane water-cooled tube row, a right side membrane water-cooled tube row, a front membrane water-cooled tube row, a rear membrane water-cooled tube row, a top membrane water-cooled tube row, and a bottom membrane water-cooled tube row.

[0008] Preferably, the six tube rows of the membrane water wall are arranged at equal intervals.

[0009] Preferably, the upper end of the left side membrane water-cooled tube row is communicated with the upper left header, the lower end of the left side membrane water-cooled tube row is communicated with the lower left header, the upper end of the right side membrane water-cooled tube row is communicated with the upper right header, and the lower end of the right side membrane water-cooled tube row is communicated with the lower right header.

[0010] Preferably, both ends of the top membrane water-cooled tube bank are respectively connected to the upper left header and the upper right header, and both ends of the bottom membrane water-cooled tube bank are respectively connected to the lower left header and the lower right header.

[0011] Preferably, the front and rear ends between the upper left header and the upper right header are connected by a communicating pipe, and the front and rear ends between the lower left header and the lower right header are also connected by a communicating pipe. The upper and lower ends of the front membrane water-cooled tube bank are respectively connected to the upper and lower communicating pipes at the front end of the header assembly, and the upper and lower ends of the rear membrane water-cooled tube bank are respectively connected to the upper and lower communicating pipes at the rear end of the header assembly.

[0012] Preferably, water inlet and outlet ports are respectively arranged on both sides of the bottom of the header assembly.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the full membrane wall combustion furnace structure with a water-cooled grate, by innovatively designing the combination form of the header assembly and the membrane water wall, the combustion efficiency and heat utilization rate of the boiler are significantly improved. This structure not only optimizes the sealing performance of the furnace, effectively reduces heat loss, but also enhances the fuel adaptability, enabling the boiler to flexibly meet the combustion requirements of various fuels.

[0015] Meanwhile, by reasonably arranging structures such as combustion interfaces, inspection holes, and tail gas discharge ports, the operation stability and maintainability of the boiler are improved, the operation cost is reduced, and the practicality and economy of the boiler are enhanced. In addition, this structure also adopts membrane water-cooled tube banks arranged at equal intervals, further improving the heat absorption efficiency and cooling effect, providing a strong guarantee for the efficient and stable operation of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic side view structure diagram of the present utility model;

[0018] Figure 3 is a schematic top view structure diagram of the present utility model;

[0019] The meanings of each label in the figure are as follows:

[0020] 1. Header assembly; 11. Upper left header; 12. Upper right header; 13. Lower left header; 14. Lower right header; 2. Membrane water wall; 21. Left side membrane water-cooled tube bank; 22. Right side membrane water-cooled tube bank; 23. Front membrane water-cooled tube bank; 24. Rear membrane water-cooled tube bank; 25. Top membrane water-cooled tube bank; 26. Bottom membrane water-cooled tube bank; 27. Combustion interface; 28. Inspection hole; 3. Connecting pipe. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0022] The present invention provides a full membrane wall combustion furnace structure with a water-cooled grate, as Figures 1-3 shown, including a header assembly 1 and a membrane water wall 2. The header assembly 1 forms the furnace frame, and the membrane water wall 2 forms the furnace side walls. The header assembly 1 includes four headers, and the membrane water wall 2 includes six groups of tube banks. A combustion interface 27 is provided at the front of the membrane water wall 2, and a number of inspection holes 28 are provided on one outer wall of the membrane water wall 2. A tail gas discharge port is provided at the rear of the membrane water wall 2. By ingeniously designing the combination of the header assembly 1 and the membrane water wall 2, an efficient and stable furnace structure is formed. This structure not only forms a strong furnace frame by the header assembly 1, but also constructs an efficient furnace side wall through the membrane water wall 2, thereby significantly improving the overall performance of the furnace.

[0023] Specifically, the combustion interface 27 provided at the front of the membrane water wall 2 facilitates the efficient input and full combustion of fuel, improving the combustion efficiency. At the same time, a number of inspection holes 28 on one outer wall of the membrane water wall 2 provide great convenience for the daily inspection and maintenance of the furnace, ensuring the long-term stable operation of the boiler. The tail gas discharge port provided at the rear effectively guarantees the smooth discharge of combustion products, avoiding the backlog and pollution in the furnace.

[0024] In addition, the six-group tube bank design of the membrane water wall 2 and the four headers in the header assembly 1 jointly optimize the heat exchange process in the furnace, improve the heat absorption and utilization efficiency, and further enhance the overall thermal efficiency of the boiler. In summary, the full membrane wall combustion furnace structure with a water-cooled grate provided by the present invention not only improves the combustion efficiency and heat utilization rate of the boiler, but also enhances its maintainability and practicability, injecting new vitality into the innovation and development of boiler technology.

[0025] In this embodiment, the header assembly 1 includes an upper left header 11, an upper right header 12, a lower left header 13, and a lower right header 14. Such a design constitutes a stable furnace frame, which not only enhances the structural strength of the furnace but also provides stable support for the membrane water wall. The reasonable layout of the four headers helps to optimize the hydrodynamic characteristics in the furnace, ensuring a more uniform distribution of gas flow and heat during the combustion process, thereby improving the combustion efficiency.

[0026] Specifically, the membrane water wall 2 includes a left-side membrane water-cooled tube bank 21, a right-side membrane water-cooled tube bank 22, a front membrane water-cooled tube bank 23, a rear membrane water-cooled tube bank 24, a top membrane water-cooled tube bank 25, and a bottom membrane water-cooled tube bank 26. This all-round coverage water wall design effectively increases the heat absorption area of the furnace and improves the heat absorption efficiency. At the same time, the presence of the water wall also plays a good heat insulation role, reducing the heat loss from the furnace to the outside world and further enhancing the thermal efficiency of the boiler.

[0027] Furthermore, the six tube banks of the membrane water wall 2 are arranged at equal intervals. Such an arrangement helps to ensure uniform heat absorption in each part of the furnace, avoiding local overheating or insufficient cooling. The equal interval arrangement also optimizes the channels for water flow and gas flow, reduces the flow resistance, and improves the overall heat transfer and combustion efficiency.

[0028] Furthermore, the upper end of the left-side membrane water-cooled tube bank 21 is connected to the upper left header 11, and the lower end of the left-side membrane water-cooled tube bank 21 is connected to the lower left header 13. The upper end of the right-side membrane water-cooled tube bank 22 is connected to the upper right header 12, and the lower end of the right-side membrane water-cooled tube bank 22 is connected to the lower right header 14. Such a connection method forms a closed water cooling loop, ensuring unobstructed water flow in the water wall, effectively taking away the heat generated during the combustion process, and protecting the furnace structure from high-temperature damage.

[0029] Furthermore, both ends of the top membrane water-cooled tube bank 25 are respectively connected to the upper left header 11 and the upper right header 12, and both ends of the bottom membrane water-cooled tube bank 26 are respectively connected to the lower left header 13 and the lower right header 14. Such a design not only enhances the cooling effect at the top and bottom of the furnace but also improves the structural stability and thermal efficiency of the entire furnace.

[0030] Furthermore, the front and rear ends of the upper left header 11 and the upper right header 12 are connected by a connecting pipe 3, and the front and rear ends of the lower left header 13 and the lower right header 14 are also connected by a connecting pipe 3. The upper and lower ends of the front membrane water-cooled tube bank 23 are respectively connected to the upper and lower connecting pipes 3 at the front end of the header assembly 1, and the upper and lower ends of the rear membrane water-cooled tube bank 24 are respectively connected to the upper and lower connecting pipes 3 at the rear end of the header assembly 1. Such a connecting design helps to optimize the fluid flow in the furnace, ensures a more uniform distribution of water flow and air flow in each part, and improves the overall heat transfer and combustion efficiency. At the same time, the connecting pipe also plays a role in balancing the pressure of each header, enhancing the operating stability of the boiler.

[0031] Furthermore, water inlets and outlets are respectively arranged on both sides of the bottom of the header assembly 1. Such a design facilitates the water inlet and drainage operations of the boiler, helps to keep the water quality in the water-cooled wall clean and the flow rate stable. The reasonable layout of the water inlets and outlets also reduces the water flow resistance and improves the operating efficiency of the water-cooling system.

[0032] When the all-membrane wall combustion furnace structure with a water-cooled grate of the present utility model is in use, first, the fuel is efficiently input into the furnace through the combustion interface 27 in front of the membrane water-cooled wall 2 and burns fully in the furnace. The high-temperature flue gas generated by combustion flows in the furnace and exchanges heat with the membrane water-cooled wall 2, transferring heat to the water in the water-cooled wall.

[0033] The membrane water-cooled wall 2 is composed of a left-side membrane water-cooled tube bank 21, a right-side membrane water-cooled tube bank 22, a front membrane water-cooled tube bank 23, a rear membrane water-cooled tube bank 24, a top membrane water-cooled tube bank 25, and a bottom membrane water-cooled tube bank 26. These tube banks cover the furnace side walls in all directions, effectively increasing the heat absorption area and improving the heat absorption efficiency. At the same time, the presence of the water-cooled wall also plays a good heat insulation role, reducing the heat dissipation from the furnace to the outside.

[0034] During the combustion process, the left-side membrane water-cooled tube bank 21 and the right-side membrane water-cooled tube bank 22 respectively form a closed water-cooling loop by connecting the upper ends to the upper left header 11 and the upper right header 12 and the lower ends to the lower left header 13 and the lower right header 14. In this way, the water in the water-cooled wall can flow unobstructed, effectively taking away the heat generated during the combustion process and protecting the furnace structure from high-temperature damage.

[0035] The top membrane water-cooled tube bank 25 and the bottom membrane water-cooled tube bank 26 are respectively connected to the upper header and the lower header, enhancing the cooling effect at the top and bottom of the furnace and improving the structural stability and thermal efficiency of the entire furnace.

[0036] In addition, the upper left header 11 and the upper right header 12, as well as the lower left header 13 and the lower right header 14, are all connected by connecting pipes 3. The upper and lower ends of the front membrane water-cooled tube bank 23 and the rear membrane water-cooled tube bank 24 are also respectively connected to the upper and lower connecting pipes 3 at the front end and the upper and lower connecting pipes 3 at the rear end of the header assembly 1. Such a connection design optimizes the fluid flow in the furnace, ensures more uniform distribution of water flow and gas flow in each part, and improves the overall heat transfer and combustion efficiency. At the same time, the connecting pipes also play a role in balancing the pressures of each header, enhancing the operating stability of the boiler.

[0037] Finally, the exhaust gas generated by combustion is smoothly discharged through the exhaust gas outlet at the rear of the membrane water wall 2, avoiding backlog and pollution in the furnace. The water inlet and outlet on both sides at the bottom of the header assembly 1 facilitate the water inlet and drainage operations of the boiler, helping to keep the water quality clean and the flow rate stable in the water wall.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A full-membrane wall combustion furnace structure with a water-cooled grate, comprising a header assembly (1) and a membrane water wall (2), characterized in that: The header assembly (1) forms the furnace frame, and the membrane water wall (2) forms the furnace side walls. The header assembly (1) includes four headers, the membrane water wall (2) includes six tube rows, a combustion interface (27) is provided at the front of the membrane water wall (2), a number of inspection holes (28) are provided on one outer wall of the membrane water wall (2), and an exhaust gas outlet is provided at the rear of the membrane water wall (2).

2. The full-membrane wall combustion furnace structure with a water-cooled grate according to claim 1, characterized in that: The header assembly (1) includes an upper left header (11), an upper right header (12), a lower left header (13), and a lower right header (14).

3. The all-membrane wall combustion furnace structure with a water-cooled grate according to claim 2, characterized in that: The membrane water wall (2) includes a left-side membrane water-cooled tube row (21), a right-side membrane water-cooled tube row (22), a front membrane water-cooled tube row (23), a rear membrane water-cooled tube row (24), a top membrane water-cooled tube row (25), and a bottom membrane water-cooled tube row (26).

4. The full-membrane wall combustion furnace structure with a water-cooled grate according to claim 1, characterized in that: The six tube rows of the membrane water wall (2) are arranged at equal intervals.

5. The full-membrane wall combustion furnace structure with a water-cooled grate according to claim 3, characterized in that: The upper end of the left-side membrane water-cooled tube row (21) is communicated with the upper left header (11), the lower end of the left-side membrane water-cooled tube row (21) is communicated with the lower left header (13), the upper end of the right-side membrane water-cooled tube row (22) is communicated with the upper right header (12), and the lower end of the right-side membrane water-cooled tube row (22) is communicated with the lower right header (14).

6. The all-membrane wall combustion furnace structure with a water-cooled grate according to claim 3, characterized in that: Both ends of the top membrane water-cooled tube row (25) are respectively connected to the upper left header (11) and the upper right header (12), and both ends of the bottom membrane water-cooled tube row (26) are respectively connected to the lower left header (13) and the lower right header (14).

7. The full-membrane wall combustion furnace structure with a water-cooled grate according to claim 3, characterized in that: The front and rear ends between the upper left header (11) and the upper right header (12) are connected by a connecting pipe (3), the front and rear ends between the lower left header (13) and the lower right header (14) are also connected by a connecting pipe (3), the upper and lower ends of the front membrane water-cooled tube row (23) are respectively connected to the upper and lower connecting pipes (3) at the front end of the header assembly (1), and the upper and lower ends of the rear membrane water-cooled tube row (24) are respectively connected to the upper and lower connecting pipes (3) at the rear end of the header assembly (1).

8. The full-membrane wall combustion furnace structure with a water-cooled grate according to claim 1, characterized in that: Water inlets and outlets are respectively provided on both sides of the bottom of the header assembly (1).

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