Hydrogenation combustion-supporting system suitable for pulverized coal boiler

Abstract

The hydrogenation combustion-supporting system comprises a combustor body and a hydrogen nozzle, one end of the hydrogen nozzle is connected with a conveying pipeline, the other end of the conveying pipeline is connected with a first inlet, a first quick-closing valve is arranged on the first inlet, and a second quick-closing valve is arranged on the second inlet. An adjusting valve is arranged at the end, close to the hydrogen spraying opening, of the conveying pipeline, and a second inlet is formed in one side of the combustor body. The hydrogen burner has the beneficial effects that hydrogen is conveyed to the burner body along the conveying pipeline from the storage device through the first inlet, the flow of the hydrogen is controlled through the adjusting valve, the adjusting valve close to the hydrogen nozzle can accurately adjust the flow of the hydrogen, air enters the burner body through the second inlet, and the first quick-closing valve is arranged on the conveying pipeline; hydrogen and air are mixed in the combustor body, stability and high efficiency of the combustion process are ensured, and efficient combustion and low-load stable combustion of pulverized coal are achieved by means of the characteristics of low ignition temperature and high combustion speed of hydrogen.

Description

Technical Field

[0001] The invention relates to the field of thermal power generation, and in particular to a hydrogenation combustion-supporting system suitable for a pulverized coal boiler. Background Art

[0002] Conventional pulverized coal boilers have too large air-to-coal ratio at low load, which affects combustion stability, easily leading to incomplete combustion and fire extinguishing, and cannot burn stably; the ignition temperature of low-volatile coal is high, resulting in delayed ignition, low combustion efficiency, and easy to produce unburned losses, poor burnout, and high boiler unburned losses. Improper burner design may lead to unstable flames, local overheating or cold spots, affecting the overall combustion efficiency. Incomplete or uneven combustion may cause slagging and ash accumulation in the furnace, affecting heat transfer effects and boiler operation. Summary of the invention

[0003] The purpose of the present invention is to provide a hydrogenation combustion-supporting system suitable for pulverized coal boilers to solve the above-mentioned technical problems of incomplete combustion and fire extinguishing, and high ignition temperature.

[0004] In order to solve the above technical problems, the present invention provides a hydrogenation combustion-supporting system suitable for a pulverized coal boiler, which includes a burner body and a hydrogen nozzle, one end of the hydrogen nozzle is connected to a transmission pipe, and the other end of the transmission pipe is connected to a first inlet, a first quick-closing valve is provided on the first inlet, a regulating valve is provided at one end of the transmission pipe close to the hydrogen nozzle, and a second inlet is provided on one side of the burner body.

[0005] Furthermore, a second quick-closing valve and a third quick-closing valve are provided on the transmission pipeline.

[0006] Furthermore, it also includes a furnace, and the burner body is respectively arranged at the four corners of the furnace, and the burner body includes a first burner, a second burner, a third burner, and a fourth burner. The first burner, the second burner, the third burner, and the fourth burner are arranged in sequence at the four corners of the furnace, and the axial centers of the four burner bodies are tangent to the center circle in sequence.

[0007] Furthermore, the first inlet is an air inlet, and the first inlet and the transmission pipeline are respectively located on two sides of the burner body.

[0008] Furthermore, the first inlet is connected to the burner body via a flange.

[0009] Furthermore, the burner body is fixedly connected to the furnace by screws.

[0010] The beneficial effects of the present invention are as follows: Compared with the prior art, a hydrogenation combustion-supporting system suitable for pulverized coal boilers is used. Hydrogen is transported from a storage device through a first inlet along a transmission pipeline to a burner body, and the hydrogen flow rate is controlled by a regulating valve to meet the combustion requirements under different working conditions; the regulating valve near the hydrogen nozzle can accurately adjust the flow rate of hydrogen to ensure the best mixing ratio with air; air enters the burner body through a second inlet, and a first quick-closing valve is provided on the transmission pipeline. These quick-closing valves provide safety protection, and can quickly cut off the hydrogen supply in an emergency. Hydrogen and air are mixed in the burner body to ensure the stability and efficiency of the combustion process, and utilize the characteristics of low ignition temperature and fast combustion rate of hydrogen to achieve efficient combustion of pulverized coal and stable combustion at low load. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The diagram is a structural diagram of a hydrogenation combustion-supporting system suitable for pulverized coal boilers.

[0012] Among them: 1. first inlet; 2. transmission pipeline; 3. first quick-closing valve; 4. furnace; 9. burner body; 91. first burner; 92. second burner; 93. third burner; 94. fourth burner; 10. second inlet; 11. hydrogen nozzle; 116. second quick-closing valve; 117. third quick-closing valve; 118. regulating valve; 12. center circle. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiment is only one embodiment of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0014] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] In the following description, references to "one embodiment", "an embodiment", "an example", "an example", etc. indicate that the embodiment or example described in this way may include specific features, structures, characteristics, properties, elements or limitations, but not every embodiment or example necessarily includes the specific features, structures, characteristics, properties, elements or limitations. In addition, repeated use of the phrase "according to one embodiment of the present application" may refer to the same embodiment, but does not necessarily refer to the same embodiment.

[0016] In this embodiment: Figure 1As shown, it includes a burner body 9 and a hydrogen nozzle 11, one end of the hydrogen nozzle 11 is connected to a transmission pipeline 2, and the other end of the transmission pipeline 2 is connected to a first inlet 1. A first quick-closing valve 3 is arranged on the first inlet 1, and a regulating valve 118 is arranged at one end of the transmission pipeline 2 close to the hydrogen nozzle 11. A second inlet 10 is arranged on one side of the burner body 9. By integrating the hydrogen nozzle 11 and the first inlet 1 on the burner body 9, accurate mixing of hydrogen and air can be achieved, thereby improving the combustion efficiency. The transmission pipeline 2 ensures that hydrogen is safely transmitted from the supply source to the burner body 9, and the regulating valve 118 is used to control the hydrogen flow rate to meet different combustion requirements; the first quick-closing valve 3 provides a rapid closing function in an emergency situation to improve the safety of the system. Hydrogen enters the burner body 9 through the transmission pipeline 2, and is mixed with air in the burner body 9 under the control of the regulating valve 118, thereby ensuring the stability and efficiency of the combustion process.

[0017] The transmission pipeline 2 is provided with a second quick-closing valve 116 and a third quick-closing valve 117. The multiple quick-closing valve design enhances the safety of the system and provides redundant protection, ensuring that when any part fails, the hydrogen supply can be quickly cut off to prevent leakage or explosion risks.

[0018] It also includes a furnace 4, and burner bodies 9 are respectively arranged at the four corners of the furnace 4. The burner bodies 9 include a first burner 91, a second burner 92, a third burner 93, and a fourth burner 94. The four corners of the furnace 4 are sequentially arranged with the first burner 91, the second burner 92, the third burner 93, and the fourth burner 94. The axial centers of the four burner bodies 9 are sequentially tangent to the center circle 12. This arrangement ensures the uniform distribution of flames in the furnace 4, improves thermal efficiency and combustion uniformity, and the symmetrical arrangement of the burner bodies 9 makes the temperature distribution in the furnace 4 more uniform, reduces the generation of local overheating or cold spots, and the arrangement of the burner bodies 9 at the four corners of the furnace 4 forms a symmetrical combustion mode. The flames converge in the central area to provide uniform heat distribution.

[0019] The first inlet 1 is an air inlet. The first inlet 1 and the transmission pipeline 2 are respectively located on both sides of the burner body 9. The separate design of the air and hydrogen inlets helps to optimize the mixing process of the two and improve the combustion efficiency. The air enters the burner through the first inlet 1 and mixes with the hydrogen entering from the other side to form a mixed gas suitable for combustion.

[0020] The first inlet 1 is connected to the burner body 9 via a flange. The flange connection provides a reliable and maintainable connection method to ensure air tightness and structural stability. The flange connection allows for quick disassembly and maintenance when necessary, while ensuring the sealing between the air and the burner body 9 to prevent leakage.

[0021] The burner body 9 is fixedly connected to the furnace 4 by screws. The screws firmly connect the burner body 9 to the furnace 4 through mechanical fixation, ensuring that the burner body 9 does not move or loosen during operation.

[0022] Working process: Hydrogen is transported from the storage device through the first inlet 1 along the transmission pipeline 2 to the burner body 9, and the hydrogen flow is controlled by the regulating valve 118 to meet the combustion requirements under different working conditions;

[0023] The regulating valve 118 near the hydrogen nozzle 11 can accurately adjust the flow rate of hydrogen to ensure the best mixing ratio with air; air enters the burner body 9 through the second inlet 10, and the first quick-closing valve 3, the second quick-closing valve 116 and the third quick-closing valve 117 are arranged on the transmission pipeline 2. These quick-closing valves provide multiple safety guarantees and can quickly cut off the hydrogen supply in an emergency. The burner body 9 is arranged at the four corners of the furnace 4 to form a symmetrical arrangement. Each burner (the first, second, third, and fourth burners 94) is tangent to the center circle 12. This arrangement ensures that the flame is evenly distributed in the furnace 4.

[0024] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydrogenation combustion-supporting system suitable for pulverized coal boilers, characterized in that: It includes a burner body and a hydrogen nozzle, one end of the hydrogen nozzle is connected to a transmission pipeline, the other end of the transmission pipeline is connected to a first inlet, a first quick-closing valve is arranged on the first inlet, a regulating valve is arranged at one end of the transmission pipeline close to the hydrogen nozzle, and a second inlet is arranged on one side of the burner body.

2. A hydrogenation combustion-supporting system suitable for a pulverized coal boiler according to claim 1, characterized in that: The transmission pipeline is provided with a second quick-closing valve and a third quick-closing valve.

3. The hydrogenation combustion-supporting system suitable for a pulverized coal boiler according to claim 1, characterized in that: It also includes a furnace, and the burner bodies are respectively arranged at the four corners of the furnace. The burner bodies include a first burner, a second burner, a third burner, and a fourth burner. The first burner, the second burner, the third burner, and the fourth burner are arranged in sequence at the four corners of the furnace, and the axial centers of the four burner bodies are tangent to the center circle in sequence.

4. The hydrogenation combustion-supporting system suitable for a pulverized coal boiler according to claim 1, characterized in that: The first inlet is an air inlet, and the first inlet and the transmission pipeline are respectively located on two sides of the burner body.

5. The hydrogenation combustion-supporting system suitable for pulverized coal boiler according to claim 1, characterized in that: The first inlet is connected to the burner body via a flange.

6. The hydrogenation combustion-supporting system suitable for pulverized coal boiler according to claim 3, characterized in that: The burner body is fixedly connected to the furnace through screws.

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