High-efficiency energy-saving hydrogen fuel boiler

Abstract

The utility model discloses a kind of high-efficiency energy-saving hydrogen combustion boiler, it is related to hydrogen combustion boiler equipment technical field. Including boiler body, the bottom fixed assembly of boiler body has combustion component, combustion component includes mixing box, mixed combustion pipe, main hydrogen pipe, auxiliary hydrogen pipe and helical air guide piece, the utility model is through the double-layer airflow structure of "center direct radiation+outer ring helical vortex", realize staged combustion, guarantee ignition stability, round table shape vortex cylinder and helical air guide piece strengthen airflow mixing, improve combustion efficiency, the double sealing of sealing component adapts thermal expansion and contraction, sealing is reliable, heat exchange pipe and cylinder structure adaptation, heat exchange is efficient;Drain valve promptly discharges condensate, avoid equipment corrosion, overall realize efficient, energy-saving, safe operation.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen-fired boiler equipment, specifically a high-efficiency and energy-saving hydrogen-fired boiler. Background Technology

[0002] Driven by the global low-carbon transition and the "dual-carbon" goal, hydrogen energy, as a zero-carbon clean energy source, has become an important direction for energy innovation in the boiler field.

[0003] However, existing hydrogen-fired boilers suffer from numerous bottlenecks due to technological limitations: hydrogen combustion is fast but flame stability is poor; the single airflow structure leads to uneven mixing of the gas mixture, which can easily cause ignition failure or local deflagration, and it is difficult to balance and stabilize the flame; unreasonable airflow organization results in incomplete combustion, and the poor compatibility between the boiler body and flue gas flow leads to low heat exchange efficiency and serious energy waste; the equipment expands and contracts significantly under high-temperature conditions, and traditional sealing structures lack the ability to compensate for this, making them prone to leakage; condensate produced during combustion easily accumulates and corrodes the equipment, shortening its service life.

[0004] Therefore, we have made improvements and proposed a high-efficiency and energy-saving hydrogen-fired boiler. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a high-efficiency and energy-saving hydrogen-fired boiler. It solves the problems of poor ignition stability, incomplete combustion, low heat exchange efficiency, lack of compensation capacity in the sealing structure, and easy accumulation of condensate that corrodes equipment in existing hydrogen-fired boilers.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-efficiency and energy-saving hydrogen-fired boiler, including a boiler body, with a combustion component fixedly assembled at the bottom of the boiler body, the combustion component including a mixing chamber, a mixing combustion pipe, a main hydrogen pipe, an auxiliary hydrogen pipe and a spiral gas guide plate; The mixing combustion pipe is connected and fixed to the upper part of the mixing box, and is sealed and inserted into the bottom of the inner cavity of the boiler body; The main hydrogen pipe is sealed and installed through the middle of the mixing chamber, with its upper end extending and inserted into the upper end of the mixing combustion pipe cavity. The spiral guide vane is wrapped around the outside of the main hydrogen pipe inside the mixing combustion tube and is fixed to the inner wall of the mixing combustion tube. The auxiliary hydrogen gas pipe is connected and fixed to one side of the mixing tank; A vortex cylinder is fixedly installed inside the mixing chamber, and an igniter is fixedly installed on one side of the mixing chamber. Flange A is fixedly installed at the bottom of the boiler body, and flange B is fixedly fitted on the lower outer wall of the mixing combustion tube. Flange A and flange B are locked and fixed by threaded fasteners, and a sealing component is assembled between them. The boiler body includes an installation cylinder, a combustion cylinder, and an outlet cylinder. The installation cylinder is fixed to the bottom of the combustion cylinder by threads, and the outlet cylinder is fixed to the upper part of the combustion cylinder by threads. A drain valve is installed on the bottom side wall of the mounting cylinder; Several heat exchange tubes are fitted to the outer wall of the combustion cylinder, and both ends of all heat exchange tubes are integrated and connected through a heat exchange water tank.

[0007] As a preferred embodiment, the main hydrogen pipeline is used to transport a high-concentration hydrogen-oxygen mixture, while the auxiliary hydrogen pipeline is used to transport a low-concentration hydrogen-oxygen mixture.

[0008] As a preferred embodiment, the vortex tube has a frustum-shaped cylindrical structure, with its small-diameter end fixedly connected to the bottom of the mixing combustion tube, and its large-diameter end sealed and fixed to the bottom wall of the mixing chamber. The outlet end of the auxiliary hydrogen pipe is inclinedly connected to the bottom side wall of the vortex cylinder.

[0009] As a preferred option, the ignition head of the igniter extends through into the inner cavity of the main hydrogen pipe.

[0010] As a preferred embodiment, the sealing component includes a metal bellows and a ceramic fiber tube, with the metal bellows fixedly fitted onto the outer wall of the ceramic fiber tube.

[0011] As a preferred embodiment, sealing ring grooves are provided on the opposite end faces of flange A and flange B, and the two ends of the ceramic fiber tube are respectively embedded in the sealing ring grooves. The metal bellows is tightly pressed and sealed with the end faces of the two flanges.

[0012] As a preferred option, both the installation cylinder and the outlet cylinder are frustum-shaped cylinder structures, while the combustion cylinder is a cylindrical cylinder structure.

[0013] As a preferred embodiment, flange A is fixed to the bottom of the mounting cylinder, and the front end of the mixing combustion pipe extends to the middle of the inner cavity of the mounting cylinder.

[0014] As a preferred option, the heat exchange tubes have a U-shaped tube structure and are evenly distributed along the axial direction of the combustion chamber.

[0015] This utility model has the following beneficial effects: This invention achieves staged combustion and ensures stable ignition through a dual-layer airflow structure of "central direct injection + outer ring spiral vortex"; The frustum-shaped vortex tube and spiral air guide vanes enhance airflow mixing and improve combustion efficiency; The double seal of the sealing components adapts to thermal expansion and contraction, ensuring reliable sealing; The heat exchange tubes are well-fitted to the shell structure, resulting in high-efficiency heat exchange. The steam trap drains condensate in a timely manner, preventing equipment corrosion and ensuring efficient, energy-saving, and safe operation of the entire system.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] Figure 1 This is the overall structural design of the present utility model; Figure 2 for Figure 1 The intention behind the enlarged structure of local A; In the diagram, 1. Boiler body; 2. Combustion components; 3. Mixing chamber; 4. Mixing and combustion tube; 5. Main hydrogen pipe; 6. Auxiliary hydrogen pipe; 7. Spiral guide vane; 8. Vortex tube; 9. Igniter; 10. Flange A; 11. Flange B; 12. Sealing components; 13. Metal bellows; 14. Ceramic fiber tube; 15. Sealing ring groove; 16. Mounting cylinder; 17. Combustion cylinder; 18. Outlet cylinder; 19. Steam trap; 20. Heat exchange tube; 21. Hot water tank. Detailed Implementation

[0018] 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.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Please refer to the examples. Figure 1 and Figure 2 This utility model provides a high-efficiency and energy-saving hydrogen-fired boiler, including a boiler body 1. A combustion component 2 is fixedly assembled at the bottom of the boiler body 1. The combustion component 2 includes a mixing box 3, a mixing combustion pipe 4, a main hydrogen pipe 5, an auxiliary hydrogen pipe 6, and a spiral gas guide plate 7. The mixing combustion pipe 4 is connected and fixed to the upper part of the mixing box 3, and is sealed and inserted into the bottom of the inner cavity of the boiler body 1. The main hydrogen pipe 5 is sealed and passes through the middle of the mixing chamber 3, and its upper end extends and is inserted into the upper end of the inner cavity of the mixing combustion pipe 4. The spiral guide vane 7 is wrapped around the outside of the main hydrogen pipe 5 inside the mixing combustion pipe 4 and is fixed to the inner wall of the mixing combustion pipe 4. The auxiliary hydrogen pipe 6 is connected and fixed to one side of the mixing chamber 3.

[0021] The main hydrogen pipe 5 is used to transport a high-concentration hydrogen-oxygen mixture, and the auxiliary hydrogen pipe 6 is used to transport a low-concentration hydrogen-oxygen mixture.

[0022] A vortex cylinder 8 is fixedly installed in the inner cavity of the mixing chamber 3. The vortex cylinder 8 is a frustum-shaped cylindrical structure. Its small diameter end is fixedly connected to the bottom of the mixing combustion pipe 4, and its large diameter end is sealed and fixedly connected to the bottom wall of the mixing chamber 3. The outlet end of the auxiliary hydrogen pipe 6 is inclinedly connected to the bottom side wall of the vortex cylinder 8, so that the low-concentration hydrogen-oxygen mixture enters the vortex cylinder 8 tangentially.

[0023] An igniter 9 is fixedly installed on one side of the mixing chamber 3, and the ignition head of the igniter 9 extends through into the inner cavity of the main hydrogen pipe 5.

[0024] A flange A10 is fixedly installed at the bottom of the boiler body 1, and a flange B11 is fixedly installed on the lower outer wall of the mixing combustion pipe 4. The flange A10 and the flange B11 are locked and fixed by threaded fasteners, and a sealing component 12 is assembled between the two.

[0025] The sealing component 12 includes a metal bellows 13 and a ceramic fiber tube 14, with the metal bellows 13 fixedly sleeved on the outer wall of the ceramic fiber tube 14. Both flange A10 and flange B11 have sealing ring grooves 15 on their opposite end faces. The ceramic fiber tube 14 is embedded in the sealing ring grooves 15 at both ends, and the metal bellows 13 is tightly pressed and sealed with the end faces of the two flanges.

[0026] The boiler body 1 includes an installation cylinder 16, a combustion cylinder 17, and an outlet cylinder 18. The installation cylinder 16 is fixed to the bottom of the combustion cylinder 17 by threads, and the outlet cylinder 18 is fixed to the upper part of the combustion cylinder 17 by threads. Both the mounting cylinder 16 and the outlet cylinder 18 are frustum-shaped cylinder structures, while the combustion cylinder 17 is a cylindrical cylinder structure.

[0027] Flange A10 is fixed to the bottom of mounting cylinder 16, and the front end of the mixing and combustion pipe 4 extends to the middle of the inner cavity of mounting cylinder 16; A drain valve 19 is installed on the bottom side wall of the mounting cylinder 16.

[0028] The outer wall of the combustion cylinder 17 is fitted with several heat exchange tubes 20 that are evenly distributed along its axial direction. The heat exchange tubes 20 have a U-shaped tube structure, and both ends of all heat exchange tubes 20 are integrated and connected through a heat exchange water tank 21.

[0029] The working principle of this utility model: A high-concentration hydrogen-oxygen mixture is directly delivered to the upper end of the inner cavity of the mixing combustion tube 4 through the main hydrogen pipe 5, forming a "central direct airflow". A low-concentration hydrogen-oxygen mixture is transported through an auxiliary hydrogen pipe 6. Because the outlet of the auxiliary hydrogen pipe 6 is inclinedly connected to the bottom side wall of the vortex cylinder 8, the gas enters the frustum-shaped vortex cylinder 8 tangentially and forms a concentrated rotating airflow under the compression of the cylinder's internal cavity.

[0030] After the low-concentration rotating airflow output from the vortex tube 8 enters the mixing combustion tube 4, it works in conjunction with the spiral air guide 7 that is attached to the inside of the tube. The airflow is forced to form a regular spiral vortex along the tube wall by the guidance of the spiral air guide 7, and is transported upward to the upper end of the inner cavity of the mixing combustion tube 4. It forms a double-layer airflow structure of "outer ring spiral vortex + central direct airflow" with the high-concentration central airflow ejected from the main hydrogen tube 5. The two airflows are precisely mixed in the combustion zone but not premixed.

[0031] The igniter 9 on one side of the mixing chamber 3 ignites the high-concentration mixture in the center by releasing a high-voltage electric spark, forming a stable flame core; The low-concentration spiral vortex airflow in the outer ring envelops the central flame. On the one hand, the spiral motion extends the combustion path and improves the completeness of combustion. On the other hand, the excess air and the dilution effect of the vortex make the temperature outside the flame core lower than the core temperature, ultimately achieving a staged combustion effect of "central rich combustion and stable flame + outer ring lean combustion and cooling".

[0032] After combustion is completed at the upper end of the inner cavity of the mixing combustion tube 4, the high-temperature flue gas enters the combustion cylinder 17 of the boiler body 1. The cylindrical structure of the combustion cylinder 17 is adapted to the spiral upward flow pattern of the flue gas. The flue gas is in full contact with the heat exchange tube 20 attached to the outer wall of the combustion cylinder 17, transferring heat to the circulating water in the heat exchange tube 20. The low-temperature flue gas after heat exchange is smoothly discharged through the outlet cylinder 18, realizing efficient heat recovery.

[0033] The condensate produced during combustion collects at the bottom of the frustum-shaped mounting cylinder 16 under gravity and is discharged in time through the drain valve 19 on the bottom side wall, effectively preventing condensate from flowing back into the mixing combustion tube 4 or corroding the boiler body 1, and ensuring the long-term stable operation of the equipment.

[0034] The bottom of the mounting cylinder 16 of the boiler body 1 is threadedly fixed to the flange B11 of the mixing combustion tube 4 via flange A10. The sealing component 12 (metal bellows 13 + ceramic fiber tube 14) between the two forms a double protection: the ceramic fiber tube 14 is embedded in the sealing ring groove 15 to achieve the sealing and isolation of high temperature flue gas. The metal bellows 13 can axially compensate for the thermal expansion and contraction displacement of the combustion components 2 and the boiler body 1 caused by temperature changes, avoid sealing failure, and ensure long-term sealing reliability.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency and energy-saving hydrogen-fired boiler, characterized in that: The boiler body (1) is included. A combustion component (2) is fixedly installed at the bottom of the boiler body (1). The combustion component (2) includes a mixing chamber (3), a mixing combustion pipe (4), a main hydrogen pipe (5), an auxiliary hydrogen pipe (6), and a spiral guide plate (7). The mixing combustion tube (4) is connected and fixed to the upper part of the mixing box (3), and is sealed and inserted into the bottom of the inner cavity of the boiler body (1); The main hydrogen pipe (5) is sealed and installed through the middle of the mixing chamber (3), and its upper end extends and is inserted into the upper end of the inner cavity of the mixing combustion pipe (4); The spiral guide vane (7) is sleeved around the outside of the main hydrogen pipe (5) inside the cavity of the mixing combustion pipe (4) and is fixed to the inner wall of the mixing combustion pipe (4); The auxiliary hydrogen pipe (6) is connected and fixed to one side of the mixing box (3); A vortex tube (8) is fixedly installed inside the mixing chamber (3), and an igniter (9) is fixedly installed on one side of the mixing chamber (3). The bottom of the boiler body (1) is fixedly provided with flange A (10), and the lower outer wall of the mixing combustion pipe (4) is fixedly provided with flange B (11). Flange A (10) and flange B (11) are locked and fixed by threaded fasteners, and a sealing component (12) is assembled between them. The boiler body (1) includes an installation cylinder (16), a combustion cylinder (17) and an outlet cylinder (18). The installation cylinder (16) is fixed to the bottom of the combustion cylinder (17) by threads, and the outlet cylinder (18) is fixed to the upper part of the combustion cylinder (17) by threads. A drain valve (19) is installed on the bottom side wall of the installation cylinder (16). The outer wall of the combustion cylinder (17) is fitted with several heat exchange tubes (20), and both ends of all heat exchange tubes (20) are integrated and connected through a heat exchange water tank (21).

2. The high-efficiency energy-saving hydrogen-fired boiler according to claim 1, characterized in that: The main hydrogen pipe (5) is used to transport a high-concentration hydrogen-oxygen mixture, and the auxiliary hydrogen pipe (6) is used to transport a low-concentration hydrogen-oxygen mixture.

3. The high-efficiency energy-saving hydrogen-fired boiler according to claim 1, characterized in that: The vortex tube (8) is a frustum-shaped cylindrical structure. Its small-diameter end is fixedly connected to the bottom of the mixing combustion tube (4), and its large-diameter end is sealed and fixed to the bottom wall of the mixing box (3). The outlet end of the auxiliary hydrogen pipe (6) is inclinedly connected to the bottom side wall of the vortex tube (8).

4. The high-efficiency energy-saving hydrogen-fired boiler according to claim 1, characterized in that: The ignition head of the igniter (9) extends through into the inner cavity of the main hydrogen pipe (5).

5. The high-efficiency energy-saving hydrogen-fired boiler according to claim 1, characterized in that: The sealing component (12) includes a metal bellows (13) and a ceramic fiber tube (14), with the metal bellows (13) fixedly sleeved on the outer wall of the ceramic fiber tube (14).

6. The high-efficiency energy-saving hydrogen-fired boiler according to claim 5, characterized in that: The flange A (10) and flange B (11) have sealing ring grooves (15) on their opposite ends. The ceramic fiber tube (14) is embedded in the sealing ring grooves (15) at both ends. The metal bellows (13) is tightly pressed and sealed with the end faces of the two flanges.

7. The high-efficiency energy-saving hydrogen-fired boiler according to claim 1, characterized in that: The mounting cylinder (16) and the outlet cylinder (18) are both frustum-shaped cylinder structures, while the combustion cylinder (17) is a cylindrical cylinder structure.

8. The high-efficiency energy-saving hydrogen-fired boiler according to claim 7, characterized in that: Flange A (10) is fixed to the bottom of the mounting cylinder (16), and the front end of the mixing combustion pipe (4) extends to the middle of the inner cavity of the mounting cylinder (16).

9. The high-efficiency energy-saving hydrogen-fired boiler according to claim 1, characterized in that: The heat exchange tube (20) has a U-shaped tube structure and is evenly distributed along the axial direction of the combustion cylinder (17).

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