Coal powder flow uniformizing device

Abstract

The utility model provides a kind of pulverized coal flow uniformizing device, comprising: connecting pipe, support mechanism and flow uniformizing mechanism;The connecting pipe is equipped with the connecting flange for connecting primary air pipe in both ends of relative arrangement along its length direction, the connecting pipe has the flow guide passage that is communicated with primary air pipe, the support mechanism is fixedly connected in the flow guide passage, the flow uniformizing mechanism includes flow uniformizing base, buffer assembly, abutment plate, flow uniformizing block and abutment rod, the flow uniformizing base is detachably connected to the support mechanism, the flow uniformizing base has the inner chamber for accommodating the buffer assembly, the abutment plate is located in the inner chamber and one end abuts the buffer assembly, and the other end is fixedly connected the abutment rod, the abutment rod is stretched to the outside of the inner chamber through the opening of the inner chamber and is fixedly connected the flow uniformizing block, and the flow uniformizing block is equipped with impact groove in one end away from the abutment rod.Such, by flow uniformizing mechanism can promote pulverized coal particle more evenly distributed in pipeline.

Description

Technical Field

[0001] This utility model belongs to the technical field of pulverized coal flow equalization equipment, and in particular relates to a pulverized coal flow equalization device. Background Technology

[0002] Coal-fired power generation is the mainstream form of thermal power generation. Its core equipment is the coal-fired boiler, and the pulverized coal burner is an important component of the boiler combustion system. It undertakes the key task of feeding pulverized coal and air into the furnace in a predetermined ratio and utilizing the thermal energy of coal to achieve energy conversion. During boiler operation, pulverized coal and primary air are injected into the furnace through the burner nozzles according to a preset mixing ratio and flow rate. To improve combustion efficiency and promote complete combustion of pulverized coal, the air required for combustion is usually divided into primary air and secondary air and fed in separately: primary air is used to mix and transport pulverized coal, ensuring the oxygen demand in the initial ignition stage of volatile matter; secondary air is supplied after the pulverized coal is ignited to ensure complete combustion of coke and residual volatile matter.

[0003] During the process of pulverized coal being transported to the burner via pipeline with primary air, the pulverized coal particles are prone to local aggregation due to the characteristics of gas-solid two-phase flow, forming high-concentration pulverized coal particle clusters, resulting in uneven airflow distribution. These pulverized coal particle clusters continuously scour the inner wall of the primary air duct during their movement, especially in areas where the flow direction changes or the flow velocity is high, easily causing local wear or even perforation of the duct wall, affecting the reliability and service life of the system. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a coal powder equalization device to disperse locally agglomerated high-concentration coal powder particles, so as to promote a more uniform distribution of coal powder in the primary air duct, thereby at least partially solving the problems in the related technologies.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A pulverized coal flow equalization device includes: a connecting pipe, a support mechanism, and a flow equalization mechanism;

[0007] Both ends of the connecting pipe, which are arranged opposite each other along its own length, are provided with connecting flanges for connecting to the primary air duct. The connecting pipe has a flow path communicating with the primary air duct. The support mechanism is fixedly connected to the flow path. The flow equalization mechanism includes a flow equalization base, a buffer assembly, an abutment plate, a flow equalization block, and an abutment rod. The flow equalization base is detachably connected to the support mechanism. The flow equalization base has an inner cavity for receiving the buffer assembly. The abutment plate is located in the inner cavity and abuts against the buffer assembly at one end, while the other end is fixedly connected to the abutment rod. The abutment rod extends through the opening of the inner cavity to the outside of the inner cavity and is fixedly connected to the flow equalization block. The end of the flow equalization block facing away from the abutment rod is provided with an impact groove.

[0008] Furthermore, the flow equalization mechanism also includes a diffusion component;

[0009] The diffusion assembly includes a diffusion shroud, a partition, and a guide plate. The partition and the diffusion shroud are fixedly connected through the guide plate. The flow equalization base is provided with a guide groove communicating with the inner cavity. The guide plate extends to the outside of the inner cavity through the guide groove.

[0010] The buffer assembly includes a first buffer spring and a second buffer spring, and the partition is disposed between the first buffer spring and the second buffer spring. The end of the second buffer spring facing away from the partition abuts against the abutment plate.

[0011] Furthermore, the diffusion assembly also includes a shielding plate, which is fixed to the guide plate to cover the guide channel.

[0012] Furthermore, there are multiple guide plates, which are arranged at circumferential intervals along the diffuser.

[0013] Furthermore, along the direction of the primary airflow, the cross-sectional area of ​​the diffuser gradually increases.

[0014] Furthermore, an impact plate is provided at the end of the diffusion shroud facing away from the partition.

[0015] Furthermore, the diffusion cover is provided with an escaping channel.

[0016] Furthermore, the support mechanism includes a support frame, a mounting column, and a sleeve;

[0017] The support frame is fixed to the inner wall of the guide passage, the mounting column is fixed to the support frame, a bearing is mounted on the mounting column, the sleeve is provided with an embedding groove for engaging with the mounting column, and the bearing is disposed between the sleeve and the mounting column.

[0018] The sleeve is provided with a threaded cylinder for detachably connecting to the flow equalization base.

[0019] Furthermore, the connection between the support frame and the inner wall of the guide passage is provided with reinforcing ribs.

[0020] Furthermore, the flow path includes a contraction section, an installation section, and a diffusion section;

[0021] Along the direction of the primary wind flow, the cross-sectional area of ​​the contraction section gradually decreases;

[0022] Along the direction of the primary airflow, the cross-sectional area of ​​the installation sections is the same;

[0023] Along the direction of the primary wind flow, the cross-sectional area of ​​the diffusion section gradually increases;

[0024] The support mechanism and the flow equalization mechanism are located in the installation section.

[0025] Through the above technical solution, the connecting flanges at both ends of the connecting pipe enable it to be stably connected in series to the primary air duct system, ensuring a smooth connection between the guide flow path and the original primary air duct. The support mechanism is fixed inside the guide flow path, thus providing a detachable connection condition for the flow equalization base, facilitating later maintenance or replacement of the flow equalization mechanism. The flow equalization block in the flow equalization mechanism is connected to the buffer assembly set in the inner cavity of the flow equalization base through the abutment rod and abutment plate, so that when the primary air carrying coal dust impacts the flow equalization block, the impact force can be transmitted to the buffer assembly through the abutment plate, thereby effectively consuming the coal dust particle group's impact on the coal. The concentrated impact energy of the pulverized coal flow equalization device reduces vibration and noise, and extends the overall service life of the device. In addition, the impact groove set at the front end of the flow equalization block can guide the pulverized coal airflow to generate local turbulence, promote the redistribution of pulverized coal particles in the cross-sectional direction of the pipe, and avoid particle aggregation and wall movement, thereby reducing the scouring and wear on the inner wall of the primary air duct. While ensuring the stability of pulverized coal transportation, the combination of buffer energy consumption and impact flow equalization not only improves the wear resistance of the primary air duct, but also improves the combustion uniformity of pulverized coal in the furnace, ultimately enhancing the safety and economy of system operation. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the pulverized coal flow equalization device provided in an exemplary embodiment of this disclosure;

[0028] Figure 2 This is a schematic diagram of the support mechanism and flow equalization mechanism provided in an exemplary embodiment of this disclosure;

[0029] Figure 3 This is a cross-sectional structural schematic diagram of the support mechanism and flow equalization mechanism provided in the exemplary embodiments of this disclosure;

[0030] Figure 4 This is a schematic diagram of the support mechanism provided in an exemplary embodiment of this disclosure;

[0031] Figure 5 This is a schematic diagram of the support frame provided in an exemplary embodiment of this disclosure;

[0032] Figure 6 This is a schematic diagram of the structure of the flow equalization base provided in an exemplary embodiment of this disclosure;

[0033] Figure 7This is a schematic diagram of the structure of the diffusion component provided in an exemplary embodiment of this disclosure;

[0034] Figure 8 This is a schematic diagram of the flow equalization mechanism provided in an exemplary embodiment of this disclosure;

[0035] Figure 9 This is a cross-sectional structural schematic diagram of the flow equalization mechanism provided in an exemplary embodiment of this disclosure;

[0036] Figure 10 This is a cross-sectional view of the connecting pipe provided in an exemplary embodiment of this disclosure.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Connecting pipe; 101. Flow guide path; 1011. Contraction section; 1012. Installation section; 1013. Diffusion section; 2. Support mechanism; 201. Support frame; 202. Mounting column; 203. Sleeve; 3. Flow equalization mechanism; 301. Flow equalization base; 3011. Inner cavity; 3012. Guide channel; 302. Abutment plate; 303. Flow equalization block; 3031. Impact groove; 304. Abutment rod; 305. Diffusion cover; 3051. Escape channel; 306. Partition plate; 307. Guide plate; 308. First buffer spring; 309. Second buffer spring; 4. Baffle plate; 5. Impact plate; 6. Threaded cylinder; 7. Reinforcing rib. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] In the specific embodiments provided in this disclosure, a pulverized coal flow equalization device is provided, with reference to Figures 1 to 10 As shown, the pulverized coal flow equalization device includes: a connecting pipe 1, a support mechanism 2, and a flow equalization mechanism 3. The connecting pipe 1 has connecting flanges at both ends that are arranged opposite to each other along its own length direction for connecting to the primary air duct. The connecting pipe 1 has a guide passage 101 that communicates with the primary air duct. The support mechanism 2 is fixedly connected to the guide passage 101. The flow equalization mechanism 3 includes a flow equalization base 301, a buffer assembly, an abutment plate 302, a flow equalization block 303, and an abutment rod 304. The flow equalization base 301 is detachably connected to the support mechanism 2. The flow equalization base 301 has an inner cavity 3011 for housing the buffer assembly. The abutment plate 302 is located in the inner cavity 3011 and abuts the buffer assembly at one end. The other end is fixedly connected to the abutment rod 304. The abutment rod 304 extends through the opening of the inner cavity 3011 to the outside of the inner cavity 3011 and is fixedly connected to the flow equalization block 303. The end of the flow equalization block 303 facing away from the abutment rod 304 is provided with an impact groove 3031.

[0044] Through the above technical solution, the connecting flanges at both ends of the connecting pipe 1 enable it to be stably connected in series to the primary air duct system, ensuring smooth connection between the guide path 101 and the original primary air duct. The support mechanism 2 is fixed inside the guide path 101, thus providing a detachable connection condition for the flow equalization base 301, facilitating later maintenance or replacement of the flow equalization mechanism 3. The flow equalization block 303 in the flow equalization mechanism 3 is connected to the buffer assembly in the inner cavity 3011 of the flow equalization base 301 through the abutment rod 304 and the abutment plate 302, so that when the primary air carrying coal powder impacts the flow equalization block 303, the impact force can be transmitted to the buffer assembly through the abutment plate 302. This effectively consumes the concentrated impact energy of pulverized coal particles on the pulverized coal flow equalization device as a whole, reduces vibration and noise, and extends the overall service life of the device. In addition, the impact groove 3031 set at the front end of the flow equalization block 303 can guide the pulverized coal airflow to generate local turbulence, promote the redistribution of pulverized coal particles in the cross-sectional direction of the pipe, and avoid particle aggregation and wall movement, thereby reducing the scouring and wear on the inner wall of the primary air duct. While ensuring the stability of pulverized coal transportation, the combination of buffer energy consumption and impact flow equalization not only improves the wear resistance of the primary air duct, but also improves the combustion uniformity of pulverized coal in the furnace, ultimately enhancing the safety and economy of system operation.

[0045] In some implementations, reference Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the flow equalization mechanism 3 also includes a diffusion assembly, which includes a diffusion shroud 305, a partition 306, and a guide plate 307. The partition 306 is fixedly connected to the diffusion shroud 305 via the guide plate 307. The flow equalization base 301 is provided with a guide groove 3012 communicating with the inner cavity 3011. The guide plate 307 extends to the outside of the inner cavity 3011 through the guide groove 3012. The buffer assembly includes a first buffer spring 308 and a second buffer spring 309. The partition 306 is disposed with the first buffer spring 308. Between the second buffer spring 309 and the second buffer spring 309, the end of the second buffer spring 309 away from the partition plate 306 abuts against the abutment plate 302; specifically, the diffuser 305 is located in the guide flow path 101 and directly faces the impact of the coal dust airflow from the primary wind (the primary wind carries coal dust to form a coal dust airflow). The diffuser 305 can initially disperse the concentrated coal dust particle group and guide it to the surroundings, and work together with the impact groove 3031 at the front end of the flow equalization block 303 to enhance the disturbance and flow equalization effect of the coal dust, making the coal dust distribution more uniform.

[0046] For example, the guide plate 307 connects the diffuser 305, the baffle 306, and the buffer assembly inside the flow equalization base 301 into an integrated linkage system. When high-concentration coal dust particles impact the diffuser 305 and the flow equalization block 303, the impact force will compress the first buffer spring 308 and the second buffer spring 309. The first buffer spring 308 and the second buffer spring 309 absorb the impact energy from the coal dust airflow, thus alleviating the scouring and wear of the device itself by the coal dust particles.

[0047] For example, the baffle 306 is disposed between the first buffer spring 308 and the second buffer spring 309. When the diffuser 305 is impacted by the pulverized coal airflow, the impact force is transmitted to the baffle 306 through the guide plate 307, causing the baffle 306 to compress the first buffer spring 308. At the same time, the impact force of the pulverized coal airflow acting on the flow equalization block 303 is transmitted through the abutment rod 304 and the abutment plate 302, pushing the baffle 306 to compress the second buffer spring 309. In actual operation, the compression and extension of the first buffer spring 308 and the second buffer spring 309 are not independent, but dynamically fluctuate with the impact intensity of the pulverized coal airflow. This dynamic fluctuation can adaptively balance the impact load from both the diffuser 305 and the flow equalization block 303, not only effectively absorbing and dissipating energy, but also causing the flow equalization mechanism 3 to vibrate moderately through the reciprocating motion of the first buffer spring 308 and the second buffer spring 309, further promoting the uniform dispersion of pulverized coal in the airflow, thereby improving the flow equalization effect.

[0048] In some implementations, reference Figure 2 , Figure 7 , Figure 8 and Figure 9 As shown, in order to prevent coal dust from entering the inner cavity 3011, the diffusion assembly also includes a baffle plate 4, which is fixedly connected to the guide plate 307. Its position and size are configured to effectively cover the guide groove 3012 on the flow equalization base 301, thereby preventing coal dust particles from entering the inner cavity 3011 of the flow equalization base 301 through the guide groove 3012 under the airflow. This avoids wear, jamming or failure of the internal buffer assembly due to coal dust intrusion, and ensures that the buffer assembly can operate stably.

[0049] Meanwhile, the baffle plate 4 can also limit the displacement direction of the guide plate 307. That is, when the diffuser 305 is impacted by airflow, the force is transmitted through the guide plate 307 and the partition plate 306 is driven to compress the first buffer spring 308, the baffle plate 4 moves synchronously with the guide plate 307. Its cooperation with the surrounding structure effectively constrains the movement path of the guide plate 307, ensuring that it can only move smoothly in the preset direction and preventing any unexpected deflection or jamming.

[0050] For example, to further prevent coal dust from entering the inner cavity 3011, an isolation fabric can be provided. This isolation fabric is preferably made of a flexible, wear-resistant, and high-temperature resistant material. The isolation fabric completely covers the baffle plate 4 without affecting its displacement, effectively covering and shielding any potential gaps. Specifically, a flexible adhesive with excellent high-temperature resistance (such as a specific RTV silicone rubber adhesive) is used to directly bond the isolation fabric to the area of ​​the flow equalization base 301 that has undergone surface cleaning (such as sandblasting). Figure 2 As shown, the isolation fabric is ring-shaped, and this ring structure allows it to completely surround and cover the annular movable gap between the baffle plate 4 and the flow equalization base 301, forming a continuous, dead-angle-free dynamic sealing barrier.

[0051] In some implementations, reference Figure 2 and Figure 7 As shown, there are multiple guide plates 307, which are arranged at intervals along the circumference of the diffuser 305. Specifically, the multiple guide plates 307 together form a stable force transmission structure, which can evenly transmit the impact force of the coal powder airflow on the diffuser 305 to the internal baffle 306 and buffer assembly. This effectively avoids structural load imbalance, jamming, or uneven wear that may be caused by single-point force, and ensures that the entire buffering process is smooth and orderly.

[0052] Meanwhile, the arrangement of multiple guide plates 307 can effectively enhance the connection strength between the guide plates 307 and the partition plates 306, thereby enhancing the structural stability of the diffuser assembly when facing the pulverized coal gas flow.

[0053] In some implementations, reference Figure 2 and Figure 7 As shown, along the flow direction of the primary air, the cross-sectional area of ​​the diffuser 305 gradually increases. When the primary air carrying pulverized coal passes through, some of the pulverized coal will flow along the outer wall of the diffuser 305 under the influence of the airflow. The gradually expanding structure of the diffuser 305 can effectively guide this part of the pulverized coal moving along the wall, guiding it to gradually diffuse outward along the contour of the hood, thereby breaking the tendency of pulverized coal particles to gather in the central area of ​​the pipe and promoting a more uniform distribution of pulverized coal in the cross-section of the flow channel.

[0054] Meanwhile, an impact plate 5 is provided at one end of the diffuser 305 away from the partition 306. Specifically, when some coal dust flows along the outer wall of the diffuser 305 to its end, it will directly impact the end face of the impact plate 5. That is, the impact plate 5 can enhance the diffusion effect of the coal dust group and force the coal dust particles to re-mix into the main airflow through physical collision, thereby improving the uniformity of coal dust distribution on the pipe cross section. Structurally, this provides a more uniform coal dust airflow for the downstream primary air duct, which helps to improve the overall combustion stability and reduce local wear on the pipe wall.

[0055] In some implementations, reference Figure 2 and Figure 7 As shown, the diffuser 305 is provided with an escaping channel 3051. Through the escaping channel 3051, a portion of the coal dust flowing along the diffuser 305 can pass through the diffuser 305 and flow towards the downstream primary air duct. Specifically, the escaping channel 3051 can divert the coal dust, effectively reducing the local concentration of coal dust flow around the outer periphery of the hood, avoiding excessive accumulation of coal dust on one side of the hood wall, and enabling the coal dust to be distributed more evenly.

[0056] In some implementations, reference Figures 3 to 5 As shown, the support mechanism 2 includes a support frame 201, a mounting column 202, and a sleeve 203;

[0057] The support frame 201 is fixed to the inner wall of the guide channel 101, and the mounting column 202 is fixed to the support frame 201. A bearing is installed on the mounting column 202. The sleeve 203 is provided with an embedded groove for engaging with the mounting column 202. The bearing is located between the sleeve 203 and the mounting column 202 so that the sleeve 203 can rotate flexibly relative to the mounting column 202. For example, the connection between the support frame 201 and the inner wall of the guide channel 101 is provided with a reinforcing rib 7 to ensure the stability of the support frame 201 in the coal powder airflow environment. The sleeve 203 is provided with a threaded cylinder 6 for detachably connecting the flow equalization base 301. The flow equalization mechanism 3 can be installed on the support mechanism 2 with the help of screws. Furthermore, the bearing allows the flow equalization mechanism 3 to be rotatably connected to the support frame 201, giving the flow equalization component a certain degree of freedom of movement and enhancing the adaptability of the flow equalization component in dealing with coal powder airflow, enabling it to perform flow equalization treatment of coal powder under complex working conditions.

[0058] In some implementations, reference Figure 1 and Figure 10As shown, the guiding flow path 101 includes a contraction section 1011, an installation section 1012, and a diffusion section 1013. Along the direction of the primary airflow, the cross-sectional area of ​​the contraction section 1011 gradually decreases, forming an acceleration channel that can converge and guide the pulverized coal airflow to accelerate smoothly, improving flow stability and creating favorable conditions for the subsequent flow equalization process. The installation section 1012, which follows closely, maintains a constant cross-sectional area, providing a relatively stable flow environment. The support mechanism 2 and the flow equalization mechanism 3 are located within the installation section 1012, ensuring that the flow equalization components perform their flow equalization and buffering functions under predetermined and controlled flow field conditions. The diffusion section 1013, located downstream of the installation section 1012, has a cross-sectional area that gradually increases along the flow direction, forming a diffusion channel. This allows the velocity of the pulverized coal airflow after flow equalization to decrease gradually, promoting the uniform distribution of pulverized coal particles and preventing them from accumulating again in the downstream pipeline.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pulverized coal flow equalization device, characterized in that, include: Connecting pipe (1), support mechanism (2), and flow equalization mechanism (3); The connecting pipe (1) has connecting flanges at both ends, which are arranged opposite each other along its length, for connecting to the primary air duct. The connecting pipe (1) has a guide passage (101) communicating with the primary air duct. The support mechanism (2) is fixedly connected to the guide passage (101). The flow equalization mechanism (3) includes a flow equalization base (301), a buffer assembly, an abutment plate (302), a flow equalization block (303), and an abutment rod (304). The flow equalization base (301) is detachably connected to the support mechanism (2). The flow equalization base (301) has an inner cavity (3011) for receiving the buffer assembly. The abutment plate (302) is located in the inner cavity (3011) and abuts against the buffer assembly at one end, and is fixedly connected to the abutment rod (304) at the other end. The abutment rod (304) extends through the opening of the inner cavity (3011) to the outside of the inner cavity (3011) and is fixedly connected to the flow equalization block (303). The flow equalization block (303) has an impact groove (3031) at one end away from the abutment rod (304).

2. The pulverized coal flow equalization device according to claim 1, characterized in that: The flow equalization mechanism (3) also includes a diffusion component; The diffusion assembly includes a diffusion shroud (305), a partition (306), and a guide plate (307). The partition (306) is fixedly connected to the diffusion shroud (305) through the guide plate (307). The flow equalization base (301) is provided with a guide groove (3012) communicating with the inner cavity (3011). The guide plate (307) extends to the outside of the inner cavity (3011) through the guide groove (3012). The buffer assembly includes a first buffer spring (308) and a second buffer spring (309), the partition (306) is disposed between the first buffer spring (308) and the second buffer spring (309), and the end of the second buffer spring (309) facing away from the partition (306) abuts against the abutment plate (302).

3. The pulverized coal flow equalization device according to claim 2, characterized in that: The diffusion assembly also includes a shielding plate (4), which is fixed to the guide plate (307) to cover the guide channel (3012).

4. The pulverized coal flow equalization device according to claim 2, characterized in that: The number of guide plates (307) is multiple, and the multiple guide plates (307) are arranged at intervals along the circumference of the diffuser (305).

5. A pulverized coal flow equalization device according to claim 2, characterized in that: Along the direction of the primary wind flow, the cross-sectional area of ​​the diffuser (305) gradually increases.

6. A pulverized coal flow equalization device according to claim 2, characterized in that: An impact plate (5) is provided at the end of the diffuser (305) facing away from the partition (306).

7. A pulverized coal flow equalization device according to claim 2, characterized in that: The diffuser cover (305) is provided with an escaping channel (3051).

8. A pulverized coal flow equalization device according to claim 1, characterized in that: The support mechanism (2) includes a support frame (201), a mounting column (202), and a sleeve (203); The support frame (201) is fixed to the inner wall of the guide passage (101), the mounting column (202) is fixed to the support frame (201), a bearing is mounted on the mounting column (202), the sleeve (203) is provided with an embedding groove for engaging with the mounting column (202), and the bearing is disposed between the sleeve (203) and the mounting column (202); The sleeve (203) is provided with a threaded sleeve (6) for detachably connecting the flow equalization base (301).

9. A pulverized coal flow equalization device according to claim 8, characterized in that: The connection between the support frame (201) and the inner wall of the guide passage (101) is provided with reinforcing ribs (7).

10. A pulverized coal flow equalization device according to claim 1, characterized in that: The flow path (101) includes a contraction section (1011), an installation section (1012), and a diffusion section (1013); Along the direction of the primary wind flow, the cross-sectional area of ​​the contraction section (1011) gradually decreases; Along the direction of the primary airflow, the cross-sectional area of ​​the installation section (1012) is the same; Along the direction of the primary wind flow, the cross-sectional area of ​​the diffuser section (1013) gradually increases; The support mechanism (2) and the flow equalization mechanism (3) are located in the installation section (1012).

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