A pulverized coal boiler burner

Abstract

This application relates to the field of boiler burner technology, and discloses a pulverized coal boiler burner. The burner includes an input pipe, which is a tubular structure open at one end, with a mounting plate at the other end; a pulverized coal pipe disposed on the mounting plate and connected to the input pipe; a gas support pipe extending through the middle of the mounting plate, with one end of the gas support pipe extending into the other end of the input pipe; and multiple guide plates disposed on the side wall of the gas support pipe, bent around the axis of the gas support pipe. This design achieves the following technical effects: through the action of the spiral guide plates on the outer wall of the gas support pipe and the dispersing frustum, pulverized coal and air can be rotatably mixed within the input pipe. Furthermore, when the pulverized coal and air are discharged from the input pipe, the dispersing frustum can further guide the flow of pulverized coal and air, thereby increasing the dispersion area of ​​the pulverized coal and air, improving the contact probability between the pulverized coal and air, and promoting complete combustion.

Description

Technical Field

[0001] This application relates to the field of boiler burner technology, and for example to a pulverized coal boiler burner. Background Technology

[0002] Currently, a pulverized coal boiler is an industrial boiler that generates heat energy through the combustion of pulverized coal. Its working principle is to mix pulverized coal with air and then burn it in the furnace.

[0003] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0004] When traditional pulverized coal boiler burners inject pulverized coal into the furnace, they rely solely on direct blowing or simple swirling. This causes the pulverized coal to easily clump together, resulting in insufficient mixing with air, forming localized high temperatures and unburned particles, thus reducing the burnout rate. Utility Model Content

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a pulverized coal boiler burner to solve the problem of insufficient pulverized coal dispersion and low combustion efficiency.

[0007] In some embodiments, the pulverized coal boiler burner includes: an input pipe, which is a tubular structure open at one end, with a mounting plate at the other end; a pulverized coal pipe disposed on the mounting plate and connected to the input pipe; a gas support pipe, which passes through the middle of the mounting plate and with one end extending into the other end of the input pipe; multiple guide plates, which are disposed on the side wall of the gas support pipe and are bent around the axis of the gas support pipe; a first air inlet, disposed on the side wall of the input pipe; and a dispersing frustum, disposed at the lower part of the gas support pipe, the side of which is a circular structure with a smaller upper side and a larger lower side.

[0008] In some embodiments, a conical platform is provided at the bottom of the dispersive truncated cone. The conical platform has a structure that is smaller at the top and larger at the bottom, and a combustion port is provided on the conical platform. The combustion port is connected to the interior of the gas support pipe.

[0009] In some embodiments, a plurality of guide vanes are provided at the bottom of the dispersing frustum, and the guide vanes are dispersed and arranged around the bottom of the dispersing frustum.

[0010] In some embodiments, the combustion port is inclined toward the bottom of the conical platform.

[0011] In some embodiments, a sleeve is provided outside the input pipe, one end of the sleeve is connected to the middle of the input pipe, an air supply cavity is provided between the input pipe and the sleeve to allow air to pass through, and the other end of the sleeve is open towards the opening of the input pipe.

[0012] In some embodiments, a second air inlet pipe is provided on the side of the sleeve.

[0013] In some embodiments, the second air intake pipe is arranged along the tangential direction of the sleeve, and the second air intake pipe is connected to the sleeve.

[0014] In some embodiments, a dispersion tube is provided at the end of the input tube. The dispersion tube is funnel-shaped and is inclined toward the side wall of the sleeve.

[0015] In some embodiments, a guide vane is provided between the sleeve and the input pipe, and the guide vane is located on one side of the upper part of the second air intake pipe.

[0016] In some embodiments, one end of the air guide plate is hinged inside the sleeve, and the other end of the air guide plate is rotatably connected to a threaded rod, which is rotatably connected to the side wall between the sleeve and the input pipe.

[0017] The pulverized coal boiler burner provided in this embodiment can achieve the following technical effects:

[0018] The spiral guide plate on the outer wall of the gas support pipe and the dispersing frustum can make the pulverized coal and air rotate and mix in the input pipe. When the pulverized coal and air are discharged from the input pipe, the dispersing frustum can further guide the pulverized coal and air, which can increase the dispersion area of ​​pulverized coal and air, increase the contact probability between pulverized coal and air, and promote complete combustion.

[0019] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0021] Figure 1 This is a schematic diagram of the structure of a pulverized coal boiler burner provided in an embodiment of this disclosure;

[0022] Figure 2 This is a bottom view structural diagram of a pulverized coal boiler burner provided in an embodiment of this disclosure;

[0023] Figure 3This is a schematic cross-sectional view of a pulverized coal boiler burner provided in an embodiment of this disclosure;

[0024] Figure 4 This is a schematic diagram of the side cross-sectional structure of a pulverized coal boiler burner provided in an embodiment of this disclosure;

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of a pulverized coal boiler burner provided in an embodiment of this disclosure.

[0026] Figure label:

[0027] 100. Input pipe; 101. Mounting plate; 102. First air inlet; 103. Dispersion pipe; 200. Pulverized coal pipe; 300. Gas support pipe; 301. Guide plate; 302. Dispersion truncated cone; 303. Conical truncated cone; 304. Combustion port; 305. Guide vane; 400. Sleeve; 401. Gas delivery cavity; 402. Second air inlet pipe; 403. Air guide plate; 404. Threaded rod Detailed Implementation

[0028] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0029] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0030] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0031] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0032] Unless otherwise stated, the term "multiple" means two or more.

[0033] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0034] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0036] Combination Figure 1-5As shown, this embodiment of the present disclosure provides a pulverized coal boiler burner, comprising: an input pipe 100, which is a tubular structure open at one end, with an mounting plate 101 at the other end of the input pipe 100; a pulverized coal pipe 200, disposed on the mounting plate 101, the pulverized coal pipe 200 being connected to the input pipe 100; a gas support pipe 300, which is disposed through the middle of the mounting plate 101, with one end of the gas support pipe 300 extending into the other end of the input pipe 100; multiple guide plates 301, which are disposed on the side wall of the gas support pipe 300 and are bent around the axis of the gas support pipe 300; a first air inlet 102, disposed on the side wall of the input pipe 100; and a dispersing frustum 302, disposed at the lower part of the gas support pipe 302, the side of the dispersing frustum 302 being a circular structure with a smaller upper part and a larger lower part.

[0037] The pulverized coal boiler burner provided in this embodiment is located at the top of the pulverized coal boiler. The burner blows pulverized coal into the boiler for combustion. The inlet pipe 100 is a circular tubular structure. One end of the inlet pipe 100 is connected to an mounting plate 101, and the other end is open for pulverized coal discharge. A pulverized coal pipe 200 on the mounting plate 101 is connected to the inlet pipe 100, allowing pulverized coal to enter the inlet pipe 100. The pulverized coal pipe 200 ensures that the pulverized coal enters the boiler through the inlet pipe 100. A gas support pipe 300 passes through the middle of the mounting plate 101 and extends into the boiler through the bottom of the inlet pipe 100. The gas support pipe 300 supplies gas to the inlet pipe 100 for combustion, thus ensuring the combustion of pulverized coal entering the boiler. The pulverized coal in the furnace is ignited. A guide plate 301 is provided on the side of the gas support pipe 300. The guide plate 301 is spirally bent around the axis of the gas support pipe 300. The first air inlet is located between the guide plate 301 and the mounting plate 101. When gas is supplied through the first air inlet, the gas and the mixed pulverized coal can form a rotating airflow under the guidance of the guide plate 301, which promotes the uniform distribution of pulverized coal and improves combustion efficiency. The dispersing frustum 302 is a conical structure with a smaller top and a larger bottom, located at the bottom of the gas support pipe 300. It can effectively disperse pulverized coal and prevent clumping. The dispersing frustum 302 further disperses the pulverized coal mixed with air, which can make the pulverized coal injected into the boiler more uniform and burn more completely, maximizing the combustion efficiency of pulverized coal, reducing energy waste, and reducing pollutant emissions.

[0038] Optionally, a conical platform 303 is provided at the bottom of the dispersive truncated cone 302. The conical platform 303 has a structure that is smaller at the top and larger at the bottom, and a combustion port 304 is provided on the conical platform 303. The combustion port 304 is connected to the interior of the gas support pipe 300.

[0039] In this way, the conical platform 303 at the bottom of the dispersing frustum 302 can further optimize the airflow distribution, and the combustion port 304 can make the gas sprayed towards the sprayed coal powder, which can facilitate the full mixing of gas and coal powder, and better ignite the coal powder, thereby improving combustion efficiency.

[0040] Optionally, a guide vane 305 is provided at the bottom of the dispersing frustum 302, and there are several guide vanes 305, which are dispersed and arranged around the bottom of the dispersing frustum 302.

[0041] In this way, there are gaps between the guide vanes 305, which allows some pulverized coal and air to pass through between the guide vanes 305, while the other pulverized coal is dispersed in all directions under the guidance of the guide vanes 305, further optimizing the distribution of pulverized coal and ensuring more uniform combustion.

[0042] Optionally, the combustion port 304 is inclined toward the bottom of the conical platform 303.

[0043] With the combustion port 304 facing the inner side wall of the boiler, the flame of the gas combustion can be directly directed towards the inner side wall of the boiler. This allows the gas and pulverized coal to mix and burn more thoroughly, further improving combustion efficiency and reducing incomplete combustion.

[0044] Optionally, a sleeve 400 is provided outside the input pipe 100. One end of the sleeve 400 is connected to the middle of the input pipe 100. An air supply cavity 401 for accommodating air passage is provided between the input pipe 100 and the sleeve 400. The other end of the sleeve 400 is open towards the end of the input pipe 100 that is open.

[0045] Thus, a sleeve 400 is fitted around the outside of the input pipe 100. The upper part of the sleeve 400 is sealed to the input pipe 100, and an air supply cavity 401 is formed between the sleeve 400 and the input pipe 100. The other end of the sleeve 400 is designed to be open. By introducing air into the sleeve 400, secondary oxygen supply can be provided to the coal powder in the input pipe 100, thereby increasing the oxidation reaction rate of the coal powder and further promoting the complete combustion of the coal powder.

[0046] Optionally, a second air inlet pipe 402 is provided on the side of the sleeve 400.

[0047] Thus, a second air inlet pipe 402 is installed on the side of the sleeve 400. The second air inlet pipe 402 can supply air into the sleeve 400, so that the air can be directly introduced into the air delivery cavity 401. Through the air delivery cavity 401, the coal powder discharged from the input pipe 100 can be oxygenated again, which enhances the combustion efficiency of the coal powder and reduces the emission of unburned coal powder.

[0048] Optionally, the second air intake pipe 402 is arranged along the tangential direction of the sleeve 400, and the second air intake pipe 402 is connected to the sleeve 400.

[0049] In this way, the second air intake pipe 402 is arranged along the tangential direction of the sleeve 400, and the air enters the air delivery cavity 401 in a rotating manner. This causes the air discharged from the sleeve 400 to form a vortex, which further promotes the mixing of pulverized coal and oxygen, and can make the pulverized coal more dispersed and evenly distributed in the combustion area, thereby greatly improving the combustion efficiency.

[0050] Optionally, a dispersing tube 103 is provided at the end of the input tube 100. The dispersing tube 103 is funnel-shaped and is inclined toward the side wall of the sleeve 400.

[0051] In this way, the dispersion tube 103 is set at the end of the input pipe 100 and has a funnel-shaped design, which allows the pulverized coal to be further diffused at the outlet of the input pipe 100. In addition, the dispersion tube 103 can guide the air output from the bushing 400 for a second time, which can better disperse and mix the air and pulverized coal, ensuring that the pulverized coal is burned evenly in the boiler, further reducing energy consumption and improving overall thermal efficiency.

[0052] Optionally, a guide vane 403 is provided between the sleeve 400 and the input pipe 100, and the guide vane 403 is located on one side of the upper part of the second air intake pipe 402.

[0053] In this way, the air guide plate 403 is installed between the sleeve 400 and the input pipe 100. By tilting, it can guide the air flow, so that the air can be discharged from the air delivery cavity 401 more effectively. This allows the air to mix better with the pulverized coal, forming a stronger vortex effect, further optimizing the combustion process, reducing energy waste, and improving combustion efficiency.

[0054] Optionally, one end of the air guide plate 403 is hinged inside the sleeve 400, and the other end of the air guide plate 403 is rotatably connected to a threaded rod 404, which is rotatably connected to the side wall between the sleeve 400 and the input pipe 100.

[0055] In this way, the air guide plate 403 is hinged in the air delivery cavity 401. By rotating the threaded rod 404, one end of the air guide plate 403 can be raised or lowered, so that the tilt angle of the air guide plate 403 can be adjusted, thereby flexibly controlling the air flow direction, optimizing the eddy intensity, further refining the mixing of coal powder and oxygen, and also adjusting the dispersion of coal powder and air.

[0056] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A pulverized coal boiler burner, characterized by, include: The input tube (100) is a tubular structure with one end open, and the other end of the input tube (100) is provided with a mounting plate (101); A pulverized coal pipe (200) is installed on the mounting plate (101), and the pulverized coal pipe (200) is connected to the input pipe (100); A gas support pipe (300) is disposed through the middle of the mounting plate (101), and one end of the gas support pipe (300) extends into the other end of the input pipe (100); Multiple guide plates (301) are provided on the side wall of the gas support pipe (300), and the guide plates (301) are bent around the axis of the gas support pipe (300). The first air inlet (102) is disposed on the side wall of the input pipe (100); A dispersing truncated cone (302) is disposed at the lower part of the gas support pipe (300), and the side of the dispersing truncated cone (302) is a circular structure with a smaller upper part and a larger lower part.

2. The pulverized coal boiler burner according to claim 1, characterized in that, The bottom of the dispersion truncated cone (302) is provided with a conical truncated cone (303), which has a structure that is smaller at the top and larger at the bottom, and a combustion port (304) is opened on the conical truncated cone (303), which is connected to the interior of the gas support pipe (300).

3. The pulverized coal boiler burner according to claim 1, characterized in that, The bottom of the dispersing truncated cone (302) is provided with a guide plate (305), and there are several guide plates (305) dispersedly arranged around the bottom of the dispersing truncated cone (302).

4. The pulverized coal boiler burner according to claim 2, characterized in that, The combustion port (304) is inclined toward the bottom of the conical platform (303).

5. The pulverized coal boiler burner according to claim 1, characterized in that, The input pipe (100) is fitted with a sleeve (400), one end of which is connected to the middle of the input pipe (100). An air supply cavity (401) is provided between the input pipe (100) and the sleeve (400) to allow air to pass through. The other end of the sleeve (400) is open towards the end of the input pipe (100).

6. The pulverized coal boiler burner according to claim 5, characterized in that, A second air inlet pipe (402) is provided on the side of the sleeve (400).

7. The pulverized coal boiler burner according to claim 6, characterized in that, The second air intake pipe (402) is arranged along the tangential direction of the sleeve (400), and the second air intake pipe (402) is connected to the sleeve (400).

8. The pulverized coal boiler burner according to claim 7, characterized in that, The input tube (100) is provided with a dispersion tube (103) at its end. The dispersion tube (103) is flared and is inclined toward the side wall of the sleeve (400).

9. The pulverized coal boiler burner according to claim 6, characterized in that, A guide plate (403) is provided between the sleeve (400) and the input pipe (100), and the guide plate (403) is located on one side of the upper part of the second air intake pipe (402).

10. The pulverized coal boiler burner according to claim 9, characterized in that, One end of the air guide plate (403) is hinged inside the sleeve (400), and the other end of the air guide plate (403) is rotatably connected to a threaded rod (404), which is rotatably connected to the side wall between the sleeve (400) and the input pipe (100).

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