A boiler air distribution plate

Abstract

This application relates to the field of boiler air distribution plate technology and discloses a boiler air distribution plate, including an air distribution plate body. The upper surface of the air distribution plate body has two equally spaced mounting holes. This boiler air distribution plate, by setting components such as a first connecting pipe, an air cap, a second connecting pipe, and an air cap, and setting mounting holes with different pitches in the first and second mounting holes, allows the corresponding first and second connecting pipes to be installed in the mounting holes. The air caps are then connected to their corresponding first and second connecting pipes. Connectors and air caps with low resistance and small pitch are positioned at the edges, while those with high resistance and large pitch are positioned at the center. This achieves uniform fluidization of the air distribution plate, reduces initial NOx emissions, ensures fluidization uniformity, and prevents "channeling" during the bed fluidization process. Sensors 1, 2, and 3 can monitor combustion and air distribution effects in real time.

Description

Technical Field

[0001] This application relates to the field of boiler air distribution plate technology, specifically a boiler air distribution plate. Background Technology

[0002] Circulating fluidized bed boilers, as a type of high-efficiency, low-pollution combustion equipment, are widely used in industries such as power, chemical, and metallurgy. However, high NOx emissions during boiler operation seriously affect environmental quality and environmental protection indicators. Existing boiler air distribution plates mostly adopt the traditional mushroom-shaped air cap design. In recent years, with increasingly stringent environmental protection requirements, boiler NOx emission control has become a technical problem that the industry urgently needs to solve. Optimizing the air distribution plate structure has become one of the key research directions for reducing NOx emissions.

[0003] However, it has been found that the air distribution in the existing boiler air distribution plates is uneven, which can easily lead to the "channeling" phenomenon in the fluidization process of the bed, causing problems such as local high temperature and high oxygen areas, resulting in high initial NOx emissions from the boiler. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a boiler air distribution plate that has the advantages of achieving uniform fluidization, reducing initial NOx emissions, ensuring fluidization uniformity, and preventing "channeling" phenomena during the bed fluidization process. This solves the problem that existing air distribution plates often result in uneven air distribution, which can easily lead to "channeling" phenomena during the bed fluidization process and cause high initial NOx emissions from the boiler.

[0005] To achieve the above objectives, this application provides the following technical solution: a boiler air distribution plate, comprising an air distribution plate body, wherein the upper surface of the air distribution plate body is provided with equidistantly arranged mounting holes I, and the upper surface of the air distribution plate body is provided with equidistantly arranged mounting holes II, wherein a connecting pipe I is fixedly installed on the inner wall of each mounting hole I, wherein the outer surface of each connecting pipe I is provided with equidistantly arranged through holes I, wherein the outer surface of each connecting pipe I is threadedly connected to an air cap I, wherein the outer surface of each air cap I is provided with equidistantly arranged through holes II, wherein the inner wall of each mounting hole II is fixedly installed with a connecting pipe II, wherein the outer surface of each connecting pipe II is provided with equidistantly arranged through holes III, wherein the outer surface of each connecting pipe II is threadedly connected to an air cap II, and wherein the outer surface of each air cap II is provided with equidistantly arranged through holes IV.

[0006] Through the above scheme, in order to achieve uniform fluidization of the entire air distribution plate and reduce the initial NOx emissions, corresponding mounting holes 1 and 2 are opened on the upper surface of the air distribution plate to install pipes 1 and 2. Installation is achieved by connecting air caps 1 and 2 to their corresponding pipes 1 and 2. Based on the distribution pattern of the bed material on the air distribution plate, the air caps and pipes on the air distribution plate are designed with specific differentiation, and different numbers of through holes are opened on the corresponding pipes and air caps. Pipes 1 and air caps 1 with more through holes are used at the wall edges, resulting in lower resistance and a smaller pitch between air caps 1. In contrast, pipes 2 and air caps 2 with fewer through holes are used at the center of the air distribution plate, resulting in higher resistance and a larger pitch between air caps 2. Ultimately, this achieves uniform fluidization of the entire air distribution plate, thereby reducing the initial NOx emissions, ensuring fluidization uniformity, and preventing the "channeling" phenomenon during the bed fluidization process.

[0007] Furthermore, a slag discharge port is provided on the upper surface of the air distribution plate body, and the air distribution plate body is made of heat-resistant cast iron.

[0008] The above scheme sets the slag discharge port on the upper surface of the air distribution plate body. The most basic function of the slag discharge port is to discharge the ash, unburned solid particles and other slag produced after fuel combustion from the area of ​​the air distribution plate body body, preventing the slag from accumulating excessively on the air distribution plate body body. The air distribution plate body body is made of heat-resistant cast iron, which has good casting formability and low cost.

[0009] Furthermore, the first and second connecting pipes are made of alloy steel, and the first and second wind caps are made of high-temperature alloy steel.

[0010] According to the above scheme, the materials of pipe 1 and pipe 2 are alloy steel, which can be used in high temperature and high pressure environments and have good structural stability. The wind cap 1 and wind cap 2 are made of high temperature alloy steel, which is also suitable for high temperature and high pressure environments and has good oxidation resistance.

[0011] Furthermore, a side wall is fixedly installed on the left side of the main body of the air distribution plate, and a second side wall is fixedly installed on the right side of the main body of the air distribution plate.

[0012] The above scheme involves setting side wall one on the left side of the main body of the air distribution panel and side wall two on the right side of the main body of the air distribution panel. Side wall one and side wall two are used to support and install the main body of the air distribution panel.

[0013] Furthermore, a front wall is fixedly installed on the front of the main body of the air distribution plate, and the back of the front wall is fixedly connected to the front of side wall one and side wall two.

[0014] The above solution places the front wall on the front of the main body of the air distribution panel. The front wall can also support the main body of the air distribution panel. The front wall is connected to side wall one and side wall two, so that the space can be enclosed.

[0015] Furthermore, a sensor, which is a temperature sensor, is fixedly installed on the right side of the side wall.

[0016] With the above solution, sensor one is installed on the right side of side wall one, and is set as a fixed connection. Sensor one is a temperature sensor that can monitor the temperature in real time.

[0017] Furthermore, a second sensor, which is a pressure sensor, is fixedly installed on the left side of the second side wall.

[0018] The above scheme allows for the installation of sensor two on the left side of side wall two, with a fixed connection, thus achieving the positioning and installation of sensor two. Sensor two is a pressure sensor that can monitor fluid pressure in real time.

[0019] Furthermore, a sensor three, which is an oxygen sensor, is fixedly installed on the left side of the second side wall.

[0020] The above scheme allows for the installation of sensor three on the left side of side wall two, which is fixed. Sensor three is an oxygen sensor that can monitor the oxygen content in the combustion zone. Through the temperature sensor, pressure sensor, and oxygen sensor, the combustion status and air distribution effect can be monitored in real time.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] This boiler air distribution plate, by setting up components such as pipe one, air cap one, pipe two, and air cap two, and by setting mounting holes one and two with different pitches, installs the corresponding pipe one and pipe two inside the mounting holes one and two, and connects air cap one and air cap two to the corresponding pipe one and pipe two. By opening different numbers of through holes, the pipes and air caps with low resistance and small pitch are set at the edge, and the pipes and air caps with high resistance and large pitch are set at the center, ultimately achieving uniform fluidization of the entire air distribution plate, thereby reducing the original NOx emissions, ensuring the uniformity of fluidization, and preventing the "channeling" phenomenon in the bed fluidization process. By setting up sensor one, sensor two, and sensor three, the combustion status and air distribution effect can be monitored in real time. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0024] Figure 2 This is a rear view structural diagram of the entire application;

[0025] Figure 3 This is a structural diagram showing the connection relationship between sidewall 2 and sensor 2 in this application;

[0026] Figure 4 Here are structural diagrams of mounting hole one and mounting hole two in this application;

[0027] Figure 5 This is a structural diagram showing the connection relationship between the second receiver and the second wind cap in this application;

[0028] Figure 6 This is a structural diagram showing the connection relationship between the receiver 1 and the hood 1 in this application.

[0029] In the picture:

[0030] 1. Main body of air distribution plate; 2. Mounting hole one; 3. Mounting hole two; 4. Connecting pipe one; 5. Through hole one; 6. Air cap one; 7. Through hole two; 8. Connecting pipe two; 9. Through hole three; 10. Air cap two; 11. Through hole four; 12. Slag discharge port; 13. Front wall; 14. Side wall one; 15. Sensor one; 16. Side wall two; 17. Sensor two; 18. Sensor three. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 4 , Figure 5 and Figure 6 This embodiment of a boiler air distribution plate includes an air distribution plate body 1. The upper surface of the air distribution plate body 1 has equidistantly arranged mounting holes 1-2 and 2-3. The inner wall of each mounting hole 1-2 is fixedly installed with a connecting pipe 4. The outer surface of each connecting pipe 1-4 has equidistantly arranged through holes 1-5. The outer surface of each connecting pipe 1-4 is threadedly connected with an air cap 1-6. The outer surface of each air cap 1-6 has equidistantly arranged through holes 2-7. The inner wall of each mounting hole 2-3 is fixedly installed with a connecting pipe 2-8. The outer surface of each connecting pipe 2-8 has equidistantly arranged through holes 3-9. The outer surface of each connecting pipe 2-8 is threadedly connected with an air cap 2-10. The outer surface of each air cap 2-10 has equidistantly arranged through holes 4-11.

[0033] Please see Figure 4The upper surface of the air distribution plate body 1 is provided with a slag discharge port 12. The air distribution plate body 1 is made of heat-resistant cast iron. The slag discharge port 12 is set on the upper surface of the air distribution plate body 1. The most basic function of the slag discharge port 12 is to discharge the ash, unburned solid particles and other slag produced after fuel combustion from the area of ​​the air distribution plate body 1, and to prevent the slag from accumulating excessively on the air distribution plate body 1. The air distribution plate body 1 is made of heat-resistant cast iron, which has good casting formability and low cost.

[0034] Please see Figure 4 , Figure 5 and Figure 6 Connector 1 (4) and Connector 2 (8) are made of alloy steel, while hood 1 (6) and hood 2 (10) are made of high-temperature alloy steel. Connector 1 (4) and Connector 2 (8) are made of alloy steel, which is suitable for high-temperature and high-pressure environments and has good structural stability. Hatches 1 (6) and Hatches 2 (10) are made of high-temperature alloy steel, which is also suitable for high-temperature and high-pressure environments and has good oxidation resistance.

[0035] Please see Figure 1 , Figure 2 and Figure 3 Side wall 14 is fixedly installed on the left side of the main body 1 of the air distribution plate, and side wall 2 16 is fixedly installed on the right side of the main body 1 of the air distribution plate. Side wall 14 is set on the left side of the main body 1 of the air distribution plate, and side wall 2 16 is set on the right side of the main body 1 of the air distribution plate. The main body 1 of the air distribution plate is supported and installed through side wall 14 and side wall 2 16.

[0036] Please see Figure 1 , Figure 2 and Figure 3 A front wall 13 is fixedly installed on the front of the main body 1 of the air distribution panel. The back of the front wall 13 is fixedly connected to the front of the first side wall 14 and the second side wall 16. The front wall 13 is set on the front of the main body 1 of the air distribution panel. The front wall 13 can also support the main body 1 of the air distribution panel. The front wall 13 is connected to the first side wall 14 and the second side wall 16 so that the space can be closed.

[0037] Please see Figure 2 and Figure 3 A sensor 15 is fixedly installed on the right side of side wall 14. The sensor 15 is a temperature sensor. The sensor 15 is installed on the right side of side wall 14 and is set as a fixed connection. The sensor 15 is a temperature sensor and can monitor the temperature in real time.

[0038] Please see Figure 1 and Figure 3Sensor 2 17 is fixedly installed on the left side of side wall 2 16. Sensor 2 17 is a pressure sensor. The installation of sensor 2 17 on the left side of side wall 2 16 is a fixed connection to achieve the positioning and installation of sensor 2 17. Sensor 2 17 is a pressure sensor that can monitor fluid pressure in real time.

[0039] Please see Figure 1 and Figure 3 Sensor 3 18 is fixedly installed on the left side of side wall 2 16. Sensor 3 18 is an oxygen sensor. Sensor 3 18 is installed on the left side of side wall 2 16 and set as fixed to realize the installation of sensor 3 18. Sensor 3 18 is an oxygen sensor that can monitor the oxygen content in the combustion zone. Through temperature sensor, pressure sensor and oxygen sensor, the combustion status and air distribution effect can be monitored in real time.

[0040] In this embodiment, a boiler air distribution plate is provided with components such as pipe 1 4, air cap 1 6, pipe 2 8, and air cap 2 10. By setting mounting holes 1 2 and 2 3 with different pitches, the corresponding pipe 1 4 and pipe 2 8 are installed inside the mounting holes 1 2 and 2 3. The air cap 1 6 and air cap 2 10 are connected to the corresponding pipe 1 4 and pipe 2 8. By opening different numbers of through holes, the pipes and air caps with low resistance and small pitch are set at the edge, and the pipes and air caps with high resistance and large pitch are set at the center. Finally, the fluidization of the entire air distribution plate is uniform, thereby reducing the original NOx emission. It can ensure the uniformity of fluidization and prevent the "channeling" phenomenon in the bed fluidization process. By setting sensors 1 15, 17 17, and 18, the combustion status and air distribution effect can be monitored in real time.

[0041] It should be noted that the diameters of through holes 1-5, 2-7, 3-9, and 4-11 are the same, but the number of holes opened on the corresponding pipes 1-4, 2-8, and wind caps 1-6 and 2-10 are different, resulting in different resistance levels.

[0042] The working principle of the above embodiments is as follows:

[0043] Mounting holes 1-2 and 2-3 are made on the upper surface of the air distribution plate body 1. Based on the distribution pattern of the bed material on the air distribution plate body 1, the air caps and connecting pipes on the air distribution plate body 1 are designed with targeted differentiation. Connecting pipe 1-4 and air cap 1-6 with more through holes are installed in the corresponding mounting holes 1-2, close to the front wall 13, side wall 1-14 and side wall 2-16, with low resistance and small pitch between air caps 1-6. In contrast, connecting pipe 2-8 and air cap 2-10 with fewer through holes are used in the center of the air distribution plate body 1, with high resistance and large pitch between air caps 2-10. Ultimately, the fluidization of the entire air distribution plate is uniform, thereby reducing the original NOx emission, ensuring the uniformity of fluidization, and preventing the "channeling" phenomenon in the bed fluidization process. Sensors 1-15, 1-17 and 1-3-18 are installed on the surface of side wall 1-14 and side wall 2-16. By setting temperature sensors, pressure sensors and oxygen sensors, the combustion status and air distribution effect can be monitored in real time.

[0044] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler air distribution plate, comprising an air distribution plate body (1), characterized in that: The upper surface of the main body (1) of the air distribution plate is provided with mounting holes 1 (2) arranged at equal intervals, and mounting holes 2 (3) arranged at equal intervals are provided on the upper surface of the main body (1). A pipe 1 (4) is fixedly installed on the inner wall of each mounting hole 1 (2). A through hole 1 (5) is provided on the outer surface of each pipe 1 (4). A wind cap 1 (6) is threadedly connected to the outer surface of each pipe 1 (4). A through hole 2 (7) is provided on the outer surface of each wind cap 1 (6). A pipe 2 (8) is fixedly installed on the inner wall of each mounting hole 2 (3). A through hole 3 (9) is provided on the outer surface of each pipe 2 (8). A wind cap 2 (10) is threadedly connected to the outer surface of each pipe 2 (8). A through hole 4 (11) is provided on the outer surface of each wind cap 2 (10).

2. A boiler air distribution plate according to claim 1, characterized in that: The upper surface of the air distribution plate body (1) is provided with a slag discharge port (12), and the material of the air distribution plate body (1) is heat-resistant cast iron.

3. A boiler air distribution plate according to claim 1, characterized in that: The first connector (4) and the second connector (8) are made of alloy steel, and the first hood (6) and the second hood (10) are made of high-temperature alloy steel.

4. A boiler air distribution plate according to claim 1, characterized in that: Side wall 1 (14) is fixedly installed on the left side of the main body (1) of the air distribution plate, and side wall 2 (16) is fixedly installed on the right side of the main body (1) of the air distribution plate.

5. A boiler air distribution plate according to claim 4, characterized in that: The front wall (13) is fixedly installed on the front of the main body (1) of the air distribution plate, and the back of the front wall (13) is fixedly connected to the front of the first side wall (14) and the second side wall (16).

6. A boiler air distribution plate according to claim 4, characterized in that: A sensor (15) is fixedly installed on the right side of the side wall (14), and the sensor (15) is a temperature sensor.

7. A boiler air distribution plate according to claim 4, characterized in that: A sensor 2 (17) is fixedly installed on the left side of the second side wall (16), and the second sensor (17) is a pressure sensor.

8. A boiler air distribution plate according to claim 4, characterized in that: Sensor 3 (18) is fixedly installed on the left side of the second side wall (16), and the third sensor (18) is an oxygen sensor.

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