A fuel flexible blending device for thermal power generating units of a power system

Abstract

The application discloses a fuel flexible blending device for thermal power generating units of a power system, which comprises a bin body, a driving assembly, a lifting assembly, a cleaning assembly and a stirring assembly; the driving assembly is installed at one end of the bin body and penetrates into the interior of the bin body through an output end; the stirring assembly is in transmission connection with the output end of the driving assembly; the lifting assembly is installed at the top of the bin body and drives the stirring assembly to make vertical lifting movement; the cleaning assembly is arranged at both ends of the bin body and comprises an adjusting part, a transmission part and a cleaning part; when the inner wall of the bin body needs to be cleaned, the stirring shaft is lifted to expand the gap between the stirring shaft and the inner wall of the bin body, so that sufficient operation space is provided for the cleaning assembly, and after the stirring shaft is lifted to a specified position, the cleaning assembly is started through mechanical linkage, and secondary operation is not needed.

Description

Technical Field

[0001] This invention belongs to the field of blending device technology, specifically relating to a flexible blending device for thermal power units in a power system. Background Technology

[0002] In thermal power systems, fuel needs to undergo pre-processing, mixing, and transportation before entering combustion equipment. Among these processes, the fuel blending device in thermal power units mechanically mixes different types of coal, serving as a pre-processing step in the fuel supply system. However, existing coal-fired systems are prone to unstable combustion, slagging, and coal blockage when handling high-moisture, low-calorific-value, or different volatile matter coal types, making it difficult to meet the stable combustion and flexible adjustment requirements under low-load conditions. Therefore, a flexible fuel blending device is needed to achieve an optimized combination of different coal properties to adapt to the dynamic changes in unit operating conditions under deep peak-shaving environments.

[0003] Currently, in the fuel blending process of thermal power units, pretreatment is required through a blending device to ensure the uniformity of fuel mixing. However, viscous components in the fuel are prone to forming scale on the inner wall of the device. If not cleaned in time, this will significantly reduce fuel delivery efficiency, increase system operating resistance, and in severe cases, even cause pipeline blockage, directly affecting the unit's load response speed and operational stability.

[0004] Existing cleaning technologies mainly rely on high-pressure water jet flushing or mechanical vibration descaling, but these methods have obvious drawbacks: high-pressure water flushing requires shutdown, is time-consuming, and consumes a lot of water; while mechanical vibration can remove some scale, it has limited effect on stubborn deposits and may damage the equipment structure. Especially in horizontal blending units, in order to maximize mixing efficiency and quality, the internal mixing shaft and the inner wall of the chamber are basically in close contact, with a narrow gap between them. Traditional scraper cleaning technology is difficult to implement, and there is a lack of effective online cleaning methods. This technical bottleneck makes the scale accumulation problem particularly prominent after long-term operation of horizontal equipment, becoming a key factor restricting the improvement of fuel blending system efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a flexible fuel blending device for thermal power units in power systems, so as to solve the problem of inconvenient operation of existing blending devices in the background art during cleaning.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flexible fuel blending device for thermal power units in a power system, the blending device comprising a silo, a drive assembly, a lifting assembly, a cleaning assembly, and a stirring assembly; The drive component is installed at one end of the chamber, and its output end extends into the interior of the chamber. The stirring assembly is connected to the output end of the driving assembly via a transmission connection. The lifting assembly is installed on the top of the chamber, and the lifting assembly drives the stirring assembly to move vertically up and down; The cleaning assembly is located at both ends of the chamber body, and the cleaning assembly comprises an adjustment part, a transmission part, and a cleaning part. The adjustment part is movably sleeved on the output end of the drive assembly in a radial limiting manner, while the transmission part is rotatably installed on the inner wall of the end of the chamber, and the cleaning part is connected to the transmission part, and the outer contour of the cleaning part fits against the inner wall of the chamber. The adjusting part is connected to the transmission part when the lifting assembly is rising; after the lifting assembly is falling, the adjusting part is separated from the transmission part.

[0007] As a preferred technical solution of the present invention, the stirring assembly includes a stirring shaft, a stud, a spring, and a bearing seat; The surface of the stirring shaft has spiral blades with opposite spiral directions, thereby discharging the mixed fuel raw materials from the discharge port at the lower middle part of the bin; the inside of the stirring shaft is hollow, which can both install the structure connected to the drive assembly inside the stirring shaft and reduce its own weight; a limiting ring and a limiting plate are fixedly installed inside the end of the stirring shaft facing the drive assembly, wherein the limiting ring is movably penetrated by the stud. The limiting end of the stud is placed between the limiting ring and the limiting plate, while the spring is placed between the limiting end of the stud and the limiting plate; the spring always pushes the stud outward, facilitating subsequent connection with the drive assembly. The bearing seats are sleeved on both ends of the stirring shaft and fixedly connected to the lifting assembly. The bearing seats ensure the normal rotation of the stirring shaft and enable the lifting of the stirring shaft.

[0008] In a preferred embodiment of the present invention, the drive assembly includes a transmission unit with a threaded hole at the output end. The stud is screwed into this threaded hole. During installation of the transmission unit and the stirring shaft, the stud is pushed and pressed against the threaded hole by a spring. The rotating threaded hole then connects with the stud threadedly until the end of the stud abuts against the bottom surface of the threaded hole. Simultaneously, the limiting end of the stud forms a tight abutment with the limiting ring, indicating that the installation is complete. The continued rotation of the threaded hole then drives the stud through the stud. A limiting ring drives the entire stirring shaft to rotate, thereby driving the stirring shaft to mix and blend the fuel raw materials. When the stirring shaft is lifted, the transmission unit reverses. At this time, the stirring shaft is subjected to the damping force of the fuel raw materials, as well as the angular deviation between the transmission unit and the stud when rotating at high speed. This can push the stud toward the inside of the stirring shaft until the end of the stud moves to the opening position of the threaded hole. At this time, the stud is no longer threadedly connected to the threaded hole, thereby realizing the subsequent lifting. The other end of the bin is fixed with a semi-circular placement seat to support the other end of the stirring shaft.

[0009] As a preferred technical solution of the present invention, the opening end of the threaded hole has a chamfer to facilitate the insertion of the stud, and the end of the stud is shaped like a frustum. When the stirring shaft is lifted upward in the later stage, when the end of the stud moves to the opening of the threaded hole, the inclined surface of the frustum-shaped stud end can be used to guide and separate the stud, avoiding the collision state of the horizontal plane.

[0010] As a preferred technical solution of the present invention, the lifting assembly includes a lifting cylinder and functional components; The lifting cylinder is installed on the top of the chamber; The functional component is installed on the output end of the lifting cylinder. The bottom end face of the functional component is connected to the bearing seat, and the bottom side of the functional component is in contact with the adjustment part.

[0011] As a preferred technical solution of the present invention, the adjusting part in the cleaning assembly includes a drive gear disk and an adjusting spring; The drive gear disk is sleeved on the output end of the transmission unit, and the drive gear disk moves only in the axial direction on the transmission unit; the adjusting spring is also sleeved on the output end of the transmission unit, and the two ends of the adjusting spring abut against the drive gear disk and the inner wall of the chamber, respectively. The bottom side of the functional component abuts against the outer surface of the drive gear disk, and as the functional component rises, it pushes the drive gear disk toward the inner wall of the chamber.

[0012] As a preferred technical solution of the present invention, the functional component is composed of a connecting rod and an adjusting frame; The connecting rod is fixed to the output end of the lifting cylinder. A slanted rod extending inclinedly towards the bottom of the outer side of the chamber is also fixed to the bottom side of the connecting rod. The adjusting frame is frame-shaped and is fixed to the bottom end face of the slanted rod. The bottom area of ​​the inner side of the adjustment frame is inclined and has a guide portion. The width of the guide portion increases from top to bottom. When the adjustment frame rises, the guide portion is in contact with the drive gear disk. When the lifting cylinder drives the connecting rod and the inclined rod to lift, the adjustment frame will also rise synchronously. During the lifting process, the guide portion will rise vertically, thereby gradually squeezing the drive gear disk, causing the drive gear disk to squeeze the adjusting spring and move towards the inner wall of the chamber. When the lifting cylinder descends, the guide portion gradually separates from the drive gear disk. At this time, the adjusting spring will bounce the drive gear disk back to the initial position.

[0013] As a preferred technical solution of the present invention, the transmission part of the cleaning component includes a transmission group one and a transmission group two; The first transmission assembly includes a drive gear 1, a transmission gear 1, and a transmission gear 2 that mesh sequentially from top to bottom; the second transmission assembly includes a drive gear 2 and a transmission gear 3 that mesh sequentially from top to bottom. The drive gear disk, pushed by the guide unit, meshes with transmission gear two and transmission gear three respectively. Both drive gear two and drive gear one have lead screws installed at their shaft centers. When the drive gear disk rotates clockwise following the output end of the transmission unit, transmission gear three, drive gear one, and transmission gear two rotate counterclockwise, while transmission gear one and drive gear two rotate clockwise, thereby realizing that the two lead screws rotate in different directions.

[0014] As a preferred technical solution of the present invention, the cleaning part of the cleaning assembly includes a first scraping frame and a second scraping frame, wherein the first scraping frame and the second scraping frame are penetrated by two lead screws; The first scraper frame is threadedly connected to one of the lead screws, while the second scraper frame is threadedly connected to the other lead screw. When the two lead screws rotate in different directions, the first scraper frame and the lead screw will move towards the center to scrape away impurities from the inner wall of the bin. The outer walls of the first and second scraper frames are provided with a guide groove with an isosceles trapezoidal longitudinal section. A guide rail with the same longitudinal section as the guide groove is fixed on the inner wall of the bin. The guide rail is used to horizontally limit the movement of the first and second scraper frames.

[0015] As a preferred technical solution of the present invention, the top of the silo is provided with at least two feed inlets to realize the flexible blending of various raw materials, while the bottom center of the silo is provided with a discharge outlet.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, when it is necessary to clean impurities adhering to the inner wall of the machine, the gap between the stirring shaft and the inner wall of the chamber is widened by raising the stirring shaft, providing sufficient working space for the cleaning component. At the same time, after the stirring shaft is raised to the designated position, the cleaning component is started through mechanical linkage without the need for secondary operation. Furthermore, when the stirring shaft returns to the working position, the cleaning component is no longer driven, effectively avoiding interference of the cleaning component with the fuel mixing process. Through the dynamic coupling design in this invention, the technical bottleneck of limited space in horizontal equipment is solved, and seamless switching between cleaning operations and production processes is achieved, greatly improving efficiency compared to traditional shutdown cleaning methods. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a flexible fuel blending device for thermal power units in a power system. Figure 2 for Figure 1 Sectional view at point AA; Figure 3 for Figure 2 Enlarged view of region A in the middle; Figure 4 for Figure 1 Enlarged diagram of the BB region; Figure 5 This is a schematic diagram showing the state of the stud and spring inside the machine body during an explosion. Figure 6 This is a schematic diagram showing the connection between the stirring shaft and the machine body; Figure 7 This is an exploded view of the drive gear disk, adjusting spring, and adjusting frame.

[0018] In the picture: 100. Bin body; 101. Discharge port; 102. Inlet port; 103. Transmission unit; 103a. Threaded hole; 104. Stirring shaft; 104a, Limiting ring; 104b, Limiting plate; 104c, Stud; 104d, Spring; 104e, Bearing housing; 201. Lifting cylinder; 201a, connecting rod; 201b, diagonal rod; 301. Drive gear disk; 302. Adjusting spring; 303. Drive gear one; 304. Transmission gear one; 305. Transmission gear two; 306. Transmission gear three; 307. Drive gear two; 401. First scraper frame; 402. Lead screw; 403. Second scraper frame; 500, Adjustment frame; 500a, Guide section. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 7 The present invention provides a technical solution: a flexible fuel blending device for thermal power units in a power system, the blending device comprising a silo 100, a drive assembly, a lifting assembly, a cleaning assembly, and a stirring assembly; The drive component is installed at one end of the chamber 100, and the output end extends into the interior of the chamber 100; The output end of the stirring assembly is connected to the drive assembly via a transmission connection. The lifting assembly is installed on the top of the chamber 100, and the lifting assembly drives the stirring assembly to move vertically up and down; The cleaning components are located at both ends of the chamber 100, and the cleaning components consist of an adjustment part, a transmission part, and a cleaning part; The adjustment part is movably sleeved on the output end of the drive assembly in a radial limiting manner, while the transmission part is rotatably installed on the inner wall of the end of the chamber 100, and the cleaning part is connected to the transmission part, and the outer contour of the cleaning part fits against the inner wall of the chamber 100. The adjustment unit is connected to the transmission unit when the lifting assembly is rising; after the lifting assembly is falling, the adjustment unit is separated from the transmission unit.

[0021] In this embodiment, refer to Figure 2 and Figure 3 The stirring assembly includes a stirring shaft 104, a stud 104c, a spring 104d, and a bearing housing 104e; The surface of the stirring shaft 104 has spiral blades with opposite spiral directions, thereby discharging the mixed fuel raw materials from the discharge port 101 located below the middle of the bin body 100; the stirring shaft 104 is hollow inside, which can both install the structure connected to the drive assembly inside the stirring shaft 104 and reduce its own weight; a limiting ring 104a and a limiting plate 104b are respectively fixed inside the end of the stirring shaft 104 facing the drive assembly, wherein the limiting ring 104a is movably penetrated by a stud 104c; The limiting end of the stud 104c is placed between the limiting ring 104a and the limiting plate 104b, while the spring 104d is placed between the limiting end of the stud 104c and the limiting plate 104b; the spring 104d always pushes the stud 104c outward toward 140, which facilitates the subsequent connection with the drive assembly. The bearing housing 104e is sleeved on both ends of the stirring shaft 104 and fixedly connected to the lifting assembly. The bearing housing 104e can ensure the normal rotation of the stirring shaft 104 and enable the lifting of the stirring shaft 104.

[0022] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 The drive assembly includes a transmission unit 103. A threaded hole 103a is provided at the output end of the transmission unit 103. A stud 104c is screwed into the threaded hole 103a. During the installation of the transmission unit 103 and the stirring shaft 104, the stud 104c is pushed and pressed against the threaded hole 103a by a spring 104d. At this time, the rotating threaded hole 103a will be threadedly connected to the stud 104c until the end of the stud 104c abuts against the inner bottom surface of the threaded hole 103a. Simultaneously, the limiting end of the stud 104c will form a tight abutment with the limiting ring 104a, indicating that the installation is in place. The continuing rotation of the threaded hole 103a will then drive the limiting ring 104a through the stud 104c. a) The limiting ring 104a drives the entire stirring shaft 104 to rotate, thereby driving the stirring shaft 104 to mix and blend the fuel raw materials. When the stirring shaft 104 is lifted, the reverse transmission unit 103 is reversed. At this time, the stirring shaft 104 is subjected to the damping force of the fuel raw materials, and the angular deviation between the transmission unit 103 and the stud 104c when they rotate at high speed can push the stud 104c toward the inside of the stirring shaft 104 until the end of the stud 104c moves to the opening position of the threaded hole 103a. At this time, the stud 104c is no longer threadedly connected to the threaded hole 103a, thereby realizing the subsequent lifting. The other end of the bin body 100 is fixed with a semi-circular placement seat to support the other end of the stirring shaft 104.

[0023] In this embodiment, refer to Figure 3 The opening end of the threaded hole 103a has a chamfer to facilitate the insertion of the stud 104c. The end of the stud 104c is truncated cone-shaped. When the stirring shaft 104 is lifted upwards later, when the end of the stud 104c moves to the opening of the threaded hole 103a, it can be guided and separated by the truncated cone-shaped inclined surface at the end of the stud 104c, thus avoiding the horizontal planes from colliding.

[0024] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The lifting assembly includes a lifting cylinder 201 and functional components; The lifting cylinder 201 is installed on the top of the chamber 100; The functional component is installed on the output end of the lifting cylinder 201. The bottom end face of the functional component is connected to the bearing seat 104e, and the bottom side of the functional component is in contact with the adjustment part.

[0025] In this embodiment, refer to Figure 3 and Figure 7 The adjustment part in the cleaning assembly includes a drive gear disk 301 and an adjustment spring 302; The drive gear disk 301 is sleeved on the output end of the transmission unit 103, and the drive gear disk 301 moves only in the axial direction on the transmission unit 103; the adjusting spring 302 is also sleeved on the output end of the transmission unit 103, and the two ends of the adjusting spring 302 abut against the drive gear disk 301 and the inner wall of the housing 100, respectively. The bottom side of the functional component abuts against the outer surface of the drive gear disk 301, and as the functional component rises, it pushes the drive gear disk 301 toward the inner wall of the chamber 100.

[0026] In this embodiment, refer to Figure 4 and Figure 7 The functional component consists of a connecting rod 201a and an adjusting frame 500; The connecting rod 201a is fixed on the output end of the lifting cylinder 201. A diagonal rod 201b extending inclinedly to the bottom of the outer side of the chamber 100 is also fixed on the bottom side of the connecting rod 201a. The adjusting frame 500 is frame-shaped and is fixed on the bottom end surface of the diagonal rod 201b. The bottom area of ​​the inner side of the adjusting frame 500 is inclined and has a guide portion 500a. The width of the guide portion 500a increases from top to bottom. When the adjusting frame 500 rises, the guide portion 500a is in contact with the drive gear disk 301. When the lifting cylinder 201 drives the connecting rod 201a and the inclined rod 201b to rise, the adjusting frame 500 will also rise synchronously. During the lifting process, the guide portion 500a will rise vertically, thereby gradually squeezing the drive gear disk 301, causing the drive gear disk 301 to squeeze the adjusting spring 302 and move towards the inner wall of the chamber 100. When the lifting cylinder 201 descends, the guide portion 500a gradually separates from the drive gear disk 301. At this time, the adjusting spring 302 will spring the drive gear disk 301 back to the initial position.

[0027] In this embodiment, refer to Figure 4 and Figure 5 The transmission part of the cleaning component includes transmission group one and transmission group two; Transmission group one includes drive gear one 303, transmission gear one 304 and transmission gear two 305 meshing from top to bottom; transmission group two includes drive gear two 307 and transmission gear three 306 meshing from top to bottom. The drive gear disk 301, driven by the guide unit 500a, meshes with the transmission gear 2 305 and the transmission gear 306 respectively. The drive gear 2 307 and the drive gear 1 303 are both equipped with lead screws 402. When the drive gear disk 301 rotates clockwise with the output end of the transmission unit 103, the transmission gear 3 306, the drive gear 1 303, and the transmission gear 2 305 rotate counterclockwise, while the transmission gear 1 304 and the drive gear 2 307 rotate clockwise, thereby realizing that the two lead screws 402 rotate in different directions.

[0028] In this embodiment, refer to Figure 5 and Figure 6 The cleaning unit in the cleaning assembly includes a first scraper frame 401 and a second scraper frame 403, and the first scraper frame 401 and the second scraper frame 403 are penetrated by two lead screws 402. The first scraper frame 401 is threadedly connected to one of the lead screws 402, while the second scraper frame 403 is threadedly connected to the other lead screw 402. When the two lead screws 402 rotate in different directions, the first scraper frame 401 and the lead screw 402 will move towards the center, thus scraping away impurities from the inner wall of the bin 100. A guide groove is provided on the outer wall of the first scraper frame 401 and the second scraper frame 403. The longitudinal section of the groove is an isosceles trapezoid. A guide rail with the same longitudinal section as the guide groove is fixed on the inner wall of the bin 100. The guide rail is used to horizontally limit the movement of the first scraper frame 401 and the second scraper frame 403.

[0029] In this embodiment, refer to Figure 1 The top of the silo 100 is provided with at least two feed inlets 102 to enable flexible blending of various raw materials, while the bottom of the silo 100 is provided with a discharge outlet 101.

[0030] The cleaning process of the blending device is described below: During the cleaning process, the transmission unit 103 is first reversed, causing the stud 104c to retract into the stirring shaft 104. After retraction, the transmission unit 103 stops rotating. Then, the lifting cylinder 201 is activated to lift the stirring shaft 104. During the lifting process, the adjusting frame 500 pushes the drive gear disk 301 towards the inner wall of the chamber 100 and compresses the adjusting spring 302. When the lifting cylinder 201 lifts the stirring shaft 104 into position, a cleaning space is created between the stirring shaft 104 and the inner wall of the chamber 100, allowing the first scraper frame 401 and the second scraper frame 403 to move. At this point, the transmission unit 103 is activated again, driving the drive gear disk 301. The drive gear disk 301 drives the drive gear 303 to rotate via the second drive gear 305 and the first drive gear 304, and drives the second drive gear 307 to rotate via the third drive gear 306. At this time, the drive gear 307 rotates. 3. The lead screw 402 connected to the second drive gear 307 rotates in different directions, moving the first scraper frame 401 and the second scraper frame 403 toward the discharge port 101, thereby cleaning the inner wall of the silo 100. After cleaning, the reverse transmission unit 103 is reversed, returning the first scraper frame 401 and the second scraper frame 403 to their initial positions. Then the transmission unit 103 stops, and at this time, the lifting cylinder 201 returns the stirring shaft 104 to its original position. The adjusting frame 500 no longer presses against the drive gear disk 301. Under the rebound of the adjusting spring 302, the drive gear disk 301 returns to its original position and does not mesh with the second transmission gear 305 and the third transmission gear 306. When the stirring shaft 104 is aligned with the output end of the transmission unit 103, the transmission unit 103 is started to connect with the stud 104c, finally achieving the purpose of driving the stirring shaft 104 to mix the fuel raw materials.

[0031] Although embodiments of the invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible fuel blending device for thermal power units in a power system, characterized in that: The mixing device includes a silo (100), a drive assembly, a lifting assembly, a cleaning assembly, and a stirring assembly; The drive component is installed at one end of the housing (100), and its output end extends into the interior of the housing (100); The stirring assembly is connected to the output end of the driving assembly via a transmission connection. The lifting assembly is installed on the top of the chamber (100), and the lifting assembly drives the stirring assembly to move vertically up and down; The cleaning assembly is located at both ends of the chamber (100), and the cleaning assembly comprises an adjustment part, a transmission part, and a cleaning part; The adjustment part is movably sleeved on the output end of the drive assembly in a radial limiting manner, while the transmission part is rotatably installed on the inner wall of the end of the chamber (100), and the cleaning part is connected to the transmission part, and the outer contour of the cleaning part fits against the inner wall of the chamber (100). The adjusting part is connected to the transmission part when the lifting assembly is rising; after the lifting assembly is falling, the adjusting part is separated from the transmission part. The stirring assembly includes a stirring shaft (104), a stud (104c), a spring (104d), and a bearing housing (104e). The surface of the stirring shaft (104) has spiral blades with opposite spiral directions; the interior of the stirring shaft (104) is hollow; a limiting ring (104a) and a limiting plate (104b) are respectively fixed inside the end of the stirring shaft (104) facing the drive assembly, wherein the limiting ring (104a) is movably penetrated by the stud (104c); The limiting end of the stud (104c) is placed between the limiting ring (104a) and the limiting plate (104b), while the spring (104d) is placed between the limiting end of the stud (104c) and the limiting plate (104b). The bearing housing (104e) is sleeved on both ends of the stirring shaft (104) and fixedly connected to the lifting assembly; The lifting assembly includes a lifting cylinder (201) and functional components; The lifting cylinder (201) is installed on the top of the chamber (100); The functional component is installed on the output end of the lifting cylinder (201), the bottom end face of the functional component is connected to the bearing seat (104e), and the bottom side of the functional component is in contact with the adjustment part; The adjustment part in the cleaning assembly includes a drive gear disk (301) and an adjustment spring (302). The drive gear disk (301) is sleeved on the output end of the transmission unit (103), and the drive gear disk (301) moves only in the axial direction on the transmission unit (103); the adjusting spring (302) is also sleeved on the output end of the transmission unit (103), and the two ends of the adjusting spring (302) abut against the drive gear disk (301) and the inner wall of the housing (100) respectively; The bottom side of the functional component abuts against the outer surface of the drive gear disk (301), and as the functional component rises, it pushes the drive gear disk (301) toward the inner wall of the chamber (100).

2. The flexible fuel blending device for thermal power units in a power system according to claim 1, characterized in that: The drive assembly includes a transmission unit (103), which has a threaded hole (103a) at the end face of its output end, and the stud (104c) is screwed into the threaded hole (103a).

3. A flexible fuel blending device for thermal power units in a power system according to claim 2, characterized in that: The open end of the threaded hole (103a) has a chamfer, while the end of the stud (104c) is frustoconical.

4. A flexible fuel blending device for thermal power units in a power system according to claim 1, characterized in that: The functional component consists of a connecting rod (201a) and an adjusting frame (500); The connecting rod (201a) is fixed on the output end of the lifting cylinder (201). A diagonal rod (201b) extending inclinedly to the bottom of the outer side of the chamber (100) is also fixed on the bottom side of the connecting rod (201a). The adjusting frame (500) is frame-shaped and is fixed on the bottom end face of the diagonal rod (201b). The bottom area of ​​the inner side of the adjustment frame (500) is inclined and has a guide portion (500a). The width of the guide portion (500a) increases from top to bottom. The guide portion (500a) fits against the drive gear disk (301) as the adjustment frame (500) rises.

5. A flexible fuel blending device for thermal power units in a power system according to claim 4, characterized in that: The transmission part of the cleaning component includes transmission group one and transmission group two; The first transmission group includes a drive gear 1 (303), a transmission gear 1 (304), and a transmission gear 2 (305) meshing from top to bottom; the second transmission group includes a drive gear 2 (307) and a transmission gear 3 (306) meshing from top to bottom. The drive gear disk (301) pushed by the guide (500a) meshes with the transmission gear two (305) and the transmission gear three (306) respectively, and the drive gear two (307) and the drive gear one (303) are both equipped with lead screws (402) at their shafts.

6. A flexible fuel blending device for thermal power units in a power system according to claim 5, characterized in that: The cleaning unit includes a first scraper frame (401) and a second scraper frame (403), and the first scraper frame (401) and the second scraper frame (403) are penetrated by two lead screws (402); The first scraper frame (401) is threadedly connected to one of the lead screws (402), while the second scraper frame (403) is threadedly connected to the other lead screw (402).

7. A flexible fuel blending device for thermal power units in a power system according to claim 1, characterized in that: The top of the silo (100) is provided with at least two feed inlets (102), and the bottom of the silo (100) is provided with a discharge outlet (101).

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