Boiler and pulverized coal flow distribution adjusting device thereof

Abstract

The utility model relates to a boiler and a pulverized coal flow distribution adjusting device thereof, the pulverized coal flow distribution adjusting device comprises a distribution box, a distribution adjusting mechanism and a scraping mechanism, the distribution box is provided with a coal storage cavity, a feeding pipe and a discharging pipe, the feeding pipe and the discharging pipe are communicated with the coal storage cavity, and the discharging pipe is used for being communicated with the feeding end of a boiler body; the adjusting mechanism comprises a first driving part and a connecting shaft penetrating through the discharging pipe in the first direction, the connecting shaft is provided with at least two blocking parts which are arranged in the first direction at intervals and used for blocking the discharging pipe, and the first driving part is used for driving the connecting shaft to move relative to the discharging pipe in the first direction; and the scraping mechanism comprises a scraping structure attached to the inner wall of the coal storage cavity, and the scraping structure is fixedly connected to the connecting shaft and used for moving along with the connecting shaft in the first direction so as to remove pulverized coal on the inner wall of the coal storage cavity of the distribution box and reduce the influence on the flowability of the pulverized coal.

Description

Technical Field

[0001] The present disclosure relates to the technical field of boilers, and in particular to a boiler and a pulverized coal flow distribution and adjustment device thereof. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler comes in the form of chemical energy in the fuel, electrical energy, thermal energy from high-temperature flue gas, etc. After conversion by the boiler, it outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. It is mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises. Existing boilers usually use pulverized coal as fuel during use. In order to avoid overfeeding the boiler, it is usually necessary to control the feed rate of pulverized coal.

[0003] For example, Chinese patent publication number CN219433325U discloses a pulverized coal flow distribution and adjustment device for a coal-fired boiler. The device comprises a vertically movable lift slide, and upper and lower sealing plates disposed within the lift slide. As the lift slide moves, the upper and lower sealing plates respectively seal the discharge port, controlling the amount of pulverized coal input. However, in this patent, pulverized coal adheres to the inner wall of the distribution box. Long-term accumulation of pulverized coal can cause it to clump onto the inner wall, affecting the overall flow of the pulverized coal within the distribution box. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the present disclosure is to provide a boiler and a pulverized coal flow distribution and adjustment device thereof, so as to remove the pulverized coal adhered to the inner wall of the distribution box in the pulverized coal flow distribution and adjustment device to reduce the impact on the fluidity of the pulverized coal.

[0005] To achieve the above-mentioned object, the present disclosure provides, in a first aspect, a pulverized coal flow distribution and adjustment device, comprising: a distribution box having a coal storage cavity and a feed pipe and a discharge pipe communicating with the coal storage cavity, the discharge pipe being configured to communicate with a feed end of a boiler body;

[0006] a distribution adjustment mechanism, comprising a first driving member and a connecting shaft extending through the discharge pipe in a first direction, the connecting shaft being provided with at least two blocking members spaced apart in the first direction for blocking the discharge pipe, the first driving member being used to drive the connecting shaft to move relative to the discharge pipe in the first direction; and

[0007] The scraping mechanism comprises a scraping structure attached to the inner wall of the coal storage chamber, wherein the scraping structure is fixedly connected to the connecting shaft and is used to move along the first direction with the connecting shaft.

[0008] Optionally, the scraper structure includes a fixed portion and a plurality of scraper portions spaced apart on the fixed portion along a first direction, and the scraper portions are attached to the inner wall of the coal storage cavity and slide relative to the inner wall of the coal storage cavity in the first direction.

[0009] Optionally, the fixing portion includes a fixing ring, the scraping portion includes a scraping ring provided on the fixing ring, and the scraping mechanism further includes a connecting rod connecting the fixing ring and the connecting shaft.

[0010] Optionally, the coal powder flow distribution and adjustment device also includes a stirring mechanism, which includes a stirring assembly and a second driving member. The stirring assembly includes a stirring rod located in the coal storage chamber, and the second driving member is driven and connected to the stirring assembly to enable the stirring rod to rotate in the coal storage chamber.

[0011] Optionally, the stirring assembly further comprises a sleeve member, which is rotatably arranged around its own axis and is inserted into the distribution box, the stirring rod is arranged on the sleeve member, the second driving member is located outside the distribution box and is drive-connected to the sleeve member, the connecting shaft is movably passed through the sleeve member along a first direction, and the connecting shaft passes through the sleeve member to extend to one end outside the distribution box and is connected to the first driving member.

[0012] Optionally, there are multiple stirring rods, and the multiple stirring rods are divided into multiple layers on the sleeve member along the first direction, and the multiple stirring rods in each layer are spaced apart along the circumference of the sleeve member around at least a portion of the outer peripheral wall of the sleeve member.

[0013] Optionally, a limiting member is provided in the coal storage chamber, and the limiting member is located between the stirring rod and the scraping structure in the first direction.

[0014] Optionally, the first driving member, the second driving member and the feeding pipe are all arranged at the top of the distribution box, and the discharge pipe is arranged at the bottom of the distribution box.

[0015] Optionally, the first driving member comprises an electric push rod, the driving end of the electric push rod is connected to the connecting shaft; and / or

[0016] The second driving member includes a driving motor, which is drivingly connected to the sleeve member to drive the sleeve member to rotate.

[0017] A second aspect of the present disclosure provides a boiler, comprising a boiler body and the pulverized coal flow distribution and adjustment device as described above, wherein a feed pipe of the pulverized coal flow distribution and adjustment device is connected to a feed end of the boiler body.

[0018] Through the above technical solution, the scraping mechanism includes a scraping structure that is attached to the inner wall of the coal storage chamber. The scraping structure is fixedly connected to the connecting shaft and is used to move along the first direction in the coal storage chamber with the connecting shaft. During the movement, the scraping structure is used to scrape the inner wall of the coal storage chamber, remove the coal powder adhered to the inner wall of the coal storage chamber, and improve the fluidity of the coal powder in the coal storage chamber.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0021] Figure 1 is a schematic diagram of the overall structure of a pulverized coal flow distribution and adjustment device provided in an exemplary embodiment of the present disclosure;

[0022] Figure 2 The exemplary embodiment of the present disclosure provides a different Figure 1 A structural diagram of the pulverized coal flow distribution and adjustment device from another perspective;

[0023] Figure 3 2 is a schematic diagram of the internal structure of a distribution box of a pulverized coal flow distribution and adjustment device provided in an exemplary embodiment of the present disclosure;

[0024] Figure 4 is a schematic structural diagram of a distribution adjustment mechanism, a stirring mechanism, and a scraping mechanism provided in an exemplary embodiment of the present disclosure, wherein a partial structure of the stirring assembly is shown in section;

[0025] Figure 5 The exemplary embodiment of the present disclosure provides a different Figure 3 Schematic diagram of the structure inside the distribution box of the coal powder flow distribution and adjustment device from the perspective.

[0026] Description of Reference Numerals

[0027] 10-distribution box; 11-top; 12-bottom; 13-feed pipe; 14-discharge pipe; 15-coal storage chamber; 20-distribution adjustment mechanism; 21-connecting shaft; 22-blocking member; 23-first driving member; 230-electric push rod; 30-scraping mechanism; 31-scraping structure; 311-fixing part; 3110-fixing ring; 312-scraping part; 3120-scraping ring; 32-connecting rod; 33-base; 40-stirring mechanism; 41-stirring assembly; 411-sleeve member; 4111-sleeve part; 4112-fixing sleeve part; 412-stirring rod; 42-second driving member; 420-driving motor; 50-transmission gear set; 51-driving gear; 52-driven gear; 60-mounting frame; 70-limiting member. DETAILED DESCRIPTION

[0028] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0029] In the present disclosure, an X-direction is established for the coal powder flow distribution and adjustment device, wherein the X-direction is the first direction, the direction indicated by the arrow of the X-direction is vertically upward, and the opposite direction is vertically downward. Unless otherwise specified, the directional words used, such as "upper" and "lower", generally indicate a direction or positional relationship based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation on the present disclosure. "Inside" and "outside" refer to the inside and outside of the outline of the component or structure itself. "First" and "second" and the like are used to distinguish one element from another and do not have sequentiality or importance.

[0030] like Figures 1 to 5As shown, the first aspect of the present disclosure provides a pulverized coal flow distribution and adjustment device, comprising a distribution box 10, a distribution adjustment mechanism 20, and a scraping mechanism 30. The distribution box 10 has a coal storage chamber 15 and a feed pipe 13 and a discharge pipe 14 connected to the coal storage chamber 15. Pulverized coal can be transported into the coal storage chamber 15 through the feed pipe 13. The discharge pipe 14 is used to communicate with the feed end of the boiler, and the pulverized coal in the coal storage chamber 15 can be discharged through the discharge pipe 14. The distribution adjustment mechanism 20 includes a first driving member 23 and a connecting shaft 21 that passes through the discharge pipe 14 along a first direction. The connecting shaft 21 is provided with at least two blocking members 22 that are arranged at intervals along the first direction for blocking the discharge pipe 14. The first driving member 23 is used to drive the connecting shaft 21 to move relative to the discharge pipe 14 along the first direction. As the first drive member 23 drives the connecting shaft 21 to move in the first direction, the blocking member 22 can pass through the discharge pipe 14 and move relative to the discharge pipe 14. When the blocking member 22 passes through the discharge pipe 14, it can abut against the inner wall of the discharge pipe 14, thereby blocking the discharge pipe 14 and preventing the pulverized coal from being transported from the coal storage chamber 15 through the discharge pipe 14 to the boiler. The specific structure and operation of the distribution adjustment mechanism 20 will be described below and will not be repeated here.

[0031] Furthermore, the scraper mechanism 30 includes a scraper structure 31 that adheres to the inner wall of the coal storage chamber 15. The scraper structure 31 is fixedly connected to the connecting shaft 21 and is configured to move in a first direction with the connecting shaft 21. When the scraper structure 31 moves in the first direction with the connecting shaft 21, the scraper structure 31 can scrape the inner wall of the coal storage chamber 15 to remove coal dust adhering to the inner wall of the coal storage chamber 15. This can, on the one hand, discharge as much coal dust as possible from the coal storage chamber 15, effectively utilizing the coal dust. On the other hand, scraping away the coal dust adhering to the inner wall of the coal storage chamber 15 can prevent the coal dust from adhering to the inner wall of the coal storage chamber 15 from agglomerating and affecting the flow of the coal dust in the coal storage chamber 15, thereby allowing the coal dust to smoothly enter the boiler from the coal storage chamber 15 through the discharge pipe 14.

[0032] The following will continue to describe the specific structure and working process of the distribution adjustment mechanism 20. The first driving member 23 of the distribution adjustment mechanism 20 can be constructed in any appropriate form. For example, the first driving member 23 can include an electric push rod 230. Figures 1 to 3 as well as Figure 4As shown, the electric push rod 230 can be installed on the top 11 of the distribution box 10. The driving end of the electric push rod 230 is connected to the connecting shaft 21. The other end of the connecting shaft 21 is inserted into the discharge pipe 14. Two blocking members 22 are spaced apart along the first direction on the connecting shaft 21. Driven by the electric push rod 230, the connecting shaft 21 moves upward or downward along the first direction. When the connecting shaft 21 moves upward, the blocking member 22 closer to the electric push rod 230 passes through the discharge pipe 14 and enters the coal storage chamber 15, while the blocking member 22 farther from the electric push rod 230 enters the discharge pipe 14 and blocks it. At this time, the coal powder in the coal storage chamber 15 enters between the two blocking members 22, causing the electric push rod 230 to drive the connecting shaft 21 downward along the first direction. The two blocking members 22 that are away from the electric push rod 230 are moved out of the discharge pipe 14, and the blocking member 22 that is closer to the electric push rod 230 enters the discharge pipe 14, thereby pushing the pulverized coal between the two blocking members 22 out through the discharge pipe 14, allowing the pulverized coal between the two blocking members 22 to enter the boiler. By transporting the pulverized coal from the coal storage chamber 15 to the boiler in this manner, the amount of pulverized coal delivered to the boiler at a time can be controlled, preventing excessive pulverized coal from being delivered at a time and affecting the combustion of the pulverized coal in the boiler.

[0033] In other possible embodiments, the connecting shaft 21 is driven to move in the first direction by the first driving member 23, so that the feed pipe 14 can be located between two adjacent sealing members 22 spaced apart along the first direction, so that the coal powder in the coal storage chamber 15 can pass through the feed pipe 14 through the gap between the feed pipe 14 and the sealing member 22. By controlling the size of the gap between each of the two sealing members 22 and the feed pipe 14, the flow rate of the coal powder entering the boiler through the feed pipe 14 can be controlled.

[0034] In addition, in some embodiments, the pulverized coal flow distribution and adjustment device further includes a stirring mechanism 40, which includes a stirring assembly 41 and a second driving member 42. The stirring assembly 41 includes a stirring rod 412 located in the coal storage chamber 15. The second driving member 42 is drivably connected to the stirring assembly 41 so that the stirring rod 412 rotates within the coal storage chamber 15. The rotation of the stirring rod 412 within the coal storage chamber 15 can stir and break up the pulverized coal in the coal storage chamber 15, thereby preventing the pulverized coal from agglomerating into agglomerates within the coal storage chamber 15, avoiding blockage of the discharge pipe 14 caused by the agglomeration of the pulverized coal, and enabling the pulverized coal to pass through the discharge pipe 14 more quickly. It should be noted that when the above-mentioned distribution and adjustment mechanism 20 is working, the stirring assembly 41 can also work synchronously, and the coal powder in the coal storage chamber 15 is stirred by the stirring rod 412, which can accelerate the flow of coal powder in the coal storage chamber 15, so that the sealing part 22 away from the electric push rod 230 among the above-mentioned two sealing parts 22 enters the discharge pipe 14 to block the sealing part 22, and when the sealing part 22 close to the electric push rod 230 among the two sealing parts 22 enters the coal storage chamber 15, the sealing part 22 in the coal storage chamber 15 can flow quickly between the two sealing parts 22; or when the discharge pipe 14 is between the two sealing parts 22 and the coal powder in the coal storage chamber 15 is transported to the boiler through the discharge pipe 14 through the gap between the discharge pipe 14 and the sealing part 22, the stirring mechanism 40 can also be started synchronously to accelerate the flow of coal powder.

[0035] In some embodiments, the stirring assembly 41 also includes a sleeve member 411, which can be rotatably arranged around its own axis and inserted into the distribution box 10. The stirring rod 412 is arranged on the sleeve member 411. The second driving member 42 is located outside the distribution box 10 and is driven and connected to the sleeve member 411. The connecting shaft 21 can be movably passed through the sleeve member 411 along a first direction. The connecting shaft 21 passes through the sleeve member 411 to extend to one end outside the distribution box 10 and is connected to the first driving member 23.

[0036] In the above-described embodiment, the second drive member 42 is capable of driving the sleeve member 411 to rotate about its own axis, thereby enabling the stirring rod 412 disposed on the sleeve member 411 to rotate about the axis of the sleeve member 411, thereby causing the stirring rod 412 to stir the pulverized coal in the coal storage chamber 15. Furthermore, the connecting shaft 21 is movable through the sleeve member 411 in a first direction, enabling the connecting shaft 21 of the distribution adjustment mechanism 20 and the sleeve member 411 of the stirring assembly 41 to be integrated, thereby reducing the space occupied by the coal storage chamber 15 and reserving more space for storing the pulverized coal. Furthermore, both the first drive member 23 and the second drive member 42 are disposed outside the distribution box 10, further reducing the space occupied by the coal storage chamber 15.

[0037] In some embodiments, the second driving member 42 includes a driving motor 420. The driving motor 420 can drive the sleeve member 411 to rotate via the transmission gear set 50. Figures 1 to 3 As shown, the transmission gear set 50 includes a driving gear 51 and a driven gear 52. The driving gear 51 is connected to the output shaft of the drive motor 420, or the driving gear 51 is directly fixedly sleeved on the output shaft of the drive motor 420. The driven gear 52 is fixedly sleeved on one end of the sleeve member 411 located outside the distribution box 10. The drive motor 420 drives the driving gear 51 to rotate, and the driving gear 51 drives the driven gear 52 to rotate, so that the drive motor 420 drives the sleeve member 411 to rotate. It should be noted that the drive motor 420 is constructed as a reduction motor or the drive motor 420 can be driven and connected to the sleeve member 411 through a reduction gear and then through the transmission gear set 50. It should be understood that the drive motor 420 and the sleeve member 411 can also be driven by other means, which are not limited here.

[0038] In some embodiments, the feed pipe 13 is disposed on the top 11 of the distribution box 10, and the discharge pipe 14 is disposed on the bottom 12 of the distribution box 10, so as to facilitate the addition of pulverized coal to the coal storage chamber 15 and the removal of pulverized coal from the coal storage chamber 15. Furthermore, the first drive member 23 and the second drive member 42 are also disposed on the top 11 of the distribution box 10. Specifically, the first drive member 23 and the second drive member 42 can be disposed on the mounting bracket 60 on the top 11 of the distribution box 10, so that the first drive member 23 and the second drive member 42 are also centrally disposed.

[0039] In some embodiments, as Figure 3 and Figure 4 As shown, there may be multiple stirring rods 412 , which are divided into multiple layers along the first direction on the sleeve member 411 , and the multiple stirring rods 412 in each layer are spaced apart around at least a portion of the outer peripheral wall of the sleeve member 411 along the circumference of the sleeve member 411 .

[0040] In the above-described embodiment, the sleeve member 411 may include a sleeve portion 4111 and a fixed sleeve portion 4112 fixedly mounted on the sleeve portion 4111. The connecting shaft 21 movably passes through the sleeve portion 4111 in a first direction. The sleeve portion 4111 is disposed within the distribution box 10 and is drivingly connected to the second driving member 42. The fixed sleeve portion 4112 is mounted on the sleeve portion 4111. As the sleeve portion 4111 rotates, the plurality of stirring rods 412 may be mounted on the fixed sleeve portion 4112 to avoid being mounted directly on the sleeve portion 4111, thereby ensuring the structural strength of the sleeve portion 4111. It should be noted that when the sleeve portion 4111 rotates, the connecting shaft 21 does not rotate with the sleeve portion 4111.

[0041] In addition, the setting of the multi-layer stirring rods 412 can enable the stirring component 41 to stir the coal powder at different depths in the coal storage chamber 15 in the first direction. The stirring rods 412 can directly act on the coal powder at different depths in the coal storage chamber 15 in the first direction, enabling the stirring component 41 to stir a larger area, thereby improving the stirring capacity of the stirring component 41 and increasing the stirring effect of the stirring component 41.

[0042] The scraping mechanism 30 is described in detail below. Figures 3 to 5 As shown, the scraping structure 31 in the scraping mechanism 30 includes a fixed portion 311 and a plurality of scraping portions 312 spaced apart along a first direction on the fixed portion 311. The scraping portions 312 are attached to the inner wall of the coal storage chamber 15 and slide in the first direction relative to the inner wall of the coal storage chamber 15 to scrape off the coal powder adhered to the inner wall of the coal storage chamber 15.

[0043] In some embodiments, the fixing portion 311 includes a fixing ring 3110, the scraping portion 312 includes a scraping ring 3120 disposed on the fixing ring 3110, and the scraping mechanism 30 also includes a connecting rod 32, which is connected between the fixing ring 3110 and the connecting shaft 21, so that the connecting shaft 21 drives the fixing ring 3110 and the scraping ring 3120 disposed on the fixing ring 3110 to move through the connecting rod 32.

[0044] In the above embodiment, in order to facilitate fixing the connecting rod 32 to the connecting shaft 21 , a base 33 may be provided on the connecting shaft 21 , and one end of the connecting rod 32 is fixed on the base 33 .

[0045] Furthermore, in some embodiments, a limiter 70 is disposed within the coal storage chamber 15. The limiter 70 is positioned in the first direction between the stirring rod 412 and the scraper structure 31. The limiter 70 can be configured as a blocking block to block the scraper structure 31 in the event of a loss of control of the electric push rod 230, preventing the scraper structure 31 from colliding with and damaging the stirring rod 412. Alternatively, the limiter 70 can be disposed on the inner wall of the coal storage chamber 15 along the circumference of the coal storage chamber 15, which will not be further described herein.

[0046] The following is a brief description of the working process of the pulverized coal flow distribution and adjustment device. First, pulverized coal is added to the coal storage chamber 15 through the feed pipe 13. At this time, the blocking member 22 can first block the discharge pipe 14. After the pulverized coal is added, the first driving member 23, which is constructed as an electric push rod 230, can be activated to move the connecting shaft 21 in the first direction to transport the pulverized coal in the coal storage chamber 15 to the boiler through the discharge pipe 14. During the pulverized coal transportation process, the second driving member 42, which is constructed as a drive motor 420, can be activated to drive the sleeve member 411 to rotate. The sleeve member 411 drives the stirring rod 412 to rotate in the coal storage chamber 15 to stir the pulverized coal in the coal storage chamber 15, accelerate the flow of the pulverized coal in the coal storage chamber 15, and break up the lumps in the coal storage chamber 15. While the connecting shaft 21 moves along the first direction, the scraping structure 31 can be driven to move in the first direction by the connecting rod 32, so that the scraping ring 3120 scrapes the inner wall of the coal storage chamber 15 to remove the coal powder adhered to the inner wall of the coal storage chamber 15.

[0047] The second aspect of the present disclosure provides a boiler, comprising a boiler body and the above-mentioned pulverized coal flow distribution and adjustment device, wherein the discharge pipe 14 of the pulverized coal flow distribution and adjustment device is connected to the feed end of the boiler body, so that the pulverized coal in the pulverized coal flow distribution and adjustment device can be transported to the boiler body through the discharge pipe 14 and the feed end of the boiler body connected to the discharge pipe 14.

[0048] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0050] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A pulverized coal flow distribution and adjustment device, characterized in that: include: A distribution box having a coal storage cavity and a feed pipe and a discharge pipe communicating with the coal storage cavity, wherein the discharge pipe is used to communicate with the feed end of the boiler body; The distribution adjustment mechanism includes a first driving member and a connecting shaft extending along a first direction through the discharge pipe, the connecting shaft being provided with at least two blocking members spaced apart along the first direction for blocking the discharge pipe, the first driving member being used to drive the connecting shaft to move relative to the discharge pipe along the first direction; as well as The scraping mechanism comprises a scraping structure attached to the inner wall of the coal storage chamber, wherein the scraping structure is fixedly connected to the connecting shaft and is used to move along the first direction with the connecting shaft.

2. The pulverized coal flow distribution and adjustment device according to claim 1, characterized in that: The scraper structure includes a fixed portion and a plurality of scraper portions spaced apart on the fixed portion along a first direction. The scraper portions are attached to the inner wall of the coal storage cavity and slide relative to the inner wall of the coal storage cavity in the first direction.

3. The pulverized coal flow distribution and adjustment device according to claim 2, characterized in that: The fixing portion includes a fixing ring, the scraping portion includes a scraping ring arranged on the fixing ring, and the scraping mechanism further includes a connecting rod connecting the fixing ring and the connecting shaft.

4. The pulverized coal flow distribution and adjustment device according to claim 1, characterized in that: The pulverized coal flow distribution and adjustment device also includes a stirring mechanism, which includes a stirring assembly and a second driving member. The stirring assembly includes a stirring rod located in the coal storage chamber, and the second driving member is driven and connected to the stirring assembly to enable the stirring rod to rotate in the coal storage chamber.

5. The pulverized coal flow distribution and adjustment device according to claim 4, characterized in that: The stirring assembly also includes a sleeve member, which is rotatable around its own axis and is inserted into the distribution box. The stirring rod is arranged on the sleeve member. The second driving member is located outside the distribution box and is driven and connected to the sleeve member. The connecting shaft is movably passed through the sleeve member along a first direction. The connecting shaft passes through the sleeve member to extend to the end outside the distribution box and is connected to the first driving member.

6. The pulverized coal flow distribution and adjustment device according to claim 5, characterized in that: There are multiple stirring rods, which are divided into multiple layers on the sleeve member along a first direction. The multiple stirring rods in each layer are spaced apart along the circumference of the sleeve member around at least a portion of the outer peripheral wall of the sleeve member.

7. The pulverized coal flow distribution and adjustment device according to claim 4, characterized in that: A limiting member is provided in the coal storage chamber, and the limiting member is located between the stirring rod and the scraping structure in a first direction.

8. The pulverized coal flow distribution and adjustment device according to claim 5, characterized in that: The first driving member, the second driving member and the feeding pipe are all arranged on the top of the distribution box, and the discharge pipe is arranged on the bottom of the distribution box.

9. The pulverized coal flow distribution and adjustment device according to claim 8, characterized in that: The first driving member includes an electric push rod, a driving end of the electric push rod is connected to the connecting shaft; and / or The second driving member includes a driving motor, which is drivingly connected to the sleeve member to drive the sleeve member to rotate.

10. A boiler, characterized in that: It comprises a boiler body and the pulverized coal flow distribution and adjustment device according to any one of claims 1 to 9, wherein the discharge pipe of the pulverized coal flow distribution and adjustment device is connected to the feed end of the boiler body.

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