Pneumatic ash conveying pipeline structure for coal economizer

Abstract

The utility model relates to the technical field of pneumatic ash conveying, and provides a pneumatic ash conveying pipeline structure for a coal economizer, which comprises a machine body, an ash conveying pipeline is fixedly connected to the side face of the machine body, a feeding pipe is fixedly connected to the top of the machine body, and a device body is fixedly connected to the top of the feeding pipe. A large motor is fixedly connected to the inner wall of the ash conveying pipeline, fan blades are fixedly connected to the tail end of an output shaft of the large motor, and a material distributing mechanism is arranged on the side face of the feeding pipe. Through mutual cooperation of internal components of the material distribution mechanism, accurate quantitative material distribution is achieved, the size of a driving drive plate is matched with the size of a driven groove wheel to ensure stable intermittent movement, a plurality of material distribution plates in a circumferential array form an independent material cavity, the material flow is controlled, and orderly material conveying is ensured through cooperation of rotation of the material distribution plates. And meanwhile, the sealing performance and the structural stability are enhanced through the symmetrical bolt design of the box cover, modular clamping groove connection is convenient to maintain, and the reliability and the material distribution efficiency of the coal economizer pneumatic ash conveying system are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic ash conveying technology, specifically, to a pneumatic ash conveying pipeline structure for an economizer. Background Technology

[0002] Economizer pneumatic ash conveying pipelines are key components in power plants and other industrial systems used to transport fly ash collected by economizers. Utilizing pneumatic power (positive or negative pressure), dry ash is transported through pipelines to designated locations such as ash storage silos. The pipelines are typically made of wear-resistant alloys or lined with ceramic to resist high-speed erosion by fly ash. The pipeline system usually includes a conveying fan, ash hopper, valves, and monitoring instruments. It features strong sealing, environmental friendliness (reducing dust spillage), and a high degree of automation, enabling long-distance, high-output conveying. This effectively improves the ash and slag treatment efficiency of power plants, reduces labor costs, and meets clean production requirements, making it an important component of modern coal-fired power unit ash removal systems.

[0003] According to a public disclosure (Publication No.: CN222292995U), a pneumatic ash conveying pipeline structure for an economizer includes: a first pipeline, a second pipeline, and a third pipeline. The first and third pipelines are located at opposite ends of the second pipeline. A baffle is fixedly installed inside the third pipeline. The baffle has several filter holes and a motor is embedded within it. A rotating shaft is located at the output end of the motor. The upper end of the rotating shaft passes through the baffle and is fitted with an arc-shaped scraper. A groove is formed on the inner wall of the third pipeline to cooperate with the arc-shaped scraper. A through hole is provided at the bottom of the groove, penetrating the third pipeline. A sealing end cap is provided in the through hole. This utility model achieves the filtration and collection of detached, agglomerated particles through the coordinated arrangement of the baffle, arc-shaped scraper, and groove, preventing them from clogging the ash conveying pipeline.

[0004] However, the above applications have problems such as poor material distribution and conveying effect and poor airflow control effect. Therefore, a pneumatic ash conveying pipeline structure for economizers is proposed. Utility Model Content

[0005] This invention proposes a pneumatic ash conveying pipeline structure for economizers, which solves the problems of poor material distribution and conveying effect and poor airflow control effect in related technologies.

[0006] According to one aspect, at least one embodiment of the present invention provides a pneumatic ash conveying pipeline structure for an economizer, comprising: a body, an ash conveying pipeline fixedly connected to the side of the body, a feed pipe fixedly connected to the top of the body, an economizer body fixedly connected to the top of the feed pipe, a large motor fixedly connected to the inner wall of the ash conveying pipeline, a fan blade fixedly connected to the end of the output shaft of the large motor, and a material distribution mechanism provided on the side of the feed pipe;

[0007] The material distribution mechanism includes a material distribution box, the side of which is fixedly connected to one end of the feed pipe. A box cover is bolted to the side of the material distribution box. A small motor is fixedly connected to the inner wall of the machine body. A rotating shaft is fixedly connected to the output shaft of the small motor. An active dial is fixedly connected to the end of the rotating shaft away from the small motor. A locking protrusion is fixedly connected to the side of the active dial. A rotating shaft is rotatably connected to the inner wall of the material distribution box. A driven grooved wheel is fixedly connected to one end of the rotating shaft. A material distribution plate is engaged on the circumferential surface of the rotating shaft. A discharge pipe is fixedly connected to the bottom of the material distribution box.

[0008] For example, in at least one embodiment of this utility model, a pneumatic ash conveying pipeline structure for an economizer is provided, which further includes: the side of the box cover is bolted with screws, and the number of screws is set to several and is symmetrical about each other along the vertical central axis of the box cover. Through the multiple symmetrically arranged screws, the contact surface between the box cover and the distribution box can be evenly pressed, avoiding deformation or gaps caused by unilateral force.

[0009] The number of material distribution plates is set to a certain extent, and they are arranged in a circumferential array on the circumferential surface of the rotating shaft two. The circumferential surface of the rotating shaft two is provided with a certain number of slots, and the number of slots is set to a certain extent, and they are arranged in a circumferential array on the circumferential surface of the rotating shaft two. The multiple material distribution plates are evenly distributed along the circumference and form independent material cavities when the rotating shaft two rotates. The intermittent movement of the driven groove wheel matches the number of material distribution plates, corresponding to the feeding and unloading cycle of one material cavity, ensuring uniform material conveying.

[0010] The bottom of the feed pipe penetrates the side of the distribution box, and the bottom of the feed pipe is located above the distribution plate. The top of the discharge pipe penetrates the bottom of the distribution box, and the top of the discharge pipe is located below the distribution plate. This allows the material to accumulate stably in the space between the distribution plates, preventing the material from accumulating at the bottom of the distribution box due to the feed position being too low, which would affect the normal operation of the distribution mechanism. When the distribution plate rotates to a specific angle with the rotating shaft, the material inside the distribution plate will fall into the discharge pipe due to gravity and eventually enter the ash conveying pipe.

[0011] The driven groove wheel has a slot on its side, and there are several slots arranged in a circumferential array on the side of the driven groove wheel. The diameter of the locking protrusion is equal to the width of the slot. When the locking protrusion is fully embedded in the slot, the driven groove wheel is precisely positioned, ensuring the stability of the material distribution plate in the feeding and unloading positions. The radius of the active dial is equal to the radius of the arc groove of the driven groove wheel. When the driven groove wheel stops rotating, the arc surface contacts to prevent the driven groove wheel from rotating unexpectedly due to external force, ensuring the stability of the material distribution process.

[0012] According to another aspect, at least one embodiment of the present invention also provides a pneumatic ash conveying pipeline structure for an economizer, comprising: an airflow distribution mechanism, the airflow distribution mechanism including a gear, a groove formed on the inner wall of the body, a slider slidably connected to the inner wall of the groove, a rack fixedly connected to the side of the slider, the gear and the rack meshing with each other, a spring fixedly connected to the bottom of the rack, the end of the spring away from the rack fixedly connected to the inner wall of the body, a connecting rod fixedly connected to the side of the rack, an airflow plate fixedly connected to the end of the connecting rod away from the rack, and the side of the airflow plate slidably connected to the inner wall of the ash conveying pipeline.

[0013] For example, in at least one embodiment of this utility model, a pneumatic ash conveying pipe structure for an economizer further includes: two springs arranged symmetrically along the vertical central axis of the rack, with the top of each spring located on the displacement trajectory of the rack, ensuring uniform elastic force during the rack's up-and-down movement. When the gear drives the rack downwards, the springs are compressed and store elastic potential energy; when the gear rotates in the opposite direction, the springs release energy to push the rack back to its original position.

[0014] The gear has spokes on its side, and the number of spokes is set to several and arranged in a circumferential array on the side of the gear. By removing redundant material on the side of the gear, the rotational inertia of the gear is significantly reduced. When a small motor drives the gear, the smaller inertia makes starting and braking faster and reduces energy loss.

[0015] The airflow plate is fixedly connected to a sliding strip on its side, and the inner wall of the ash conveying pipe is provided with a sliding rail. There are two sliding strips and two sliding rails, which are symmetrical to each other along the vertical central axis of the airflow plate. The two symmetrical sliding strips and the sliding rails form a linear guide rail system, which strictly constrains the movement trajectory of the airflow plate, so that it can only slide in a straight line along the inner wall of the ash conveying pipe, and avoids angular deviation caused by airflow impact or deflection of the connecting rod.

[0016] The width of the gear is equal to the width of the rack, avoiding tooth surface wear or fatigue fracture caused by localized stress concentration. This significantly extends the lifespan of transmission components, especially in high-load pneumatic ash conveying systems. The width of the connecting rod is equal to the width of the airflow plate, ensuring that the thrust transmitted by the spring through the rack is evenly distributed across the entire cross-section of the airflow plate. This prevents the airflow plate from bending and deforming due to uneven stress, ensuring its flatness and sealing performance when adjusting wind speed.

[0017] The working principle and beneficial effects of this utility model are as follows:

[0018] 1. This utility model achieves precise quantitative material distribution through the coordinated operation of components such as the active dial, driven grooved wheel, and distribution plate within the material distribution mechanism. The size matching between the active dial and the driven grooved wheel ensures stable intermittent movement. Several circumferentially arrayed distribution plates form independent material chambers to control material flow. The precise layout of the inlet and outlet pipes, combined with the rotation of the distribution plates, ensures orderly material transmission. Simultaneously, the symmetrical bolt design of the cover enhances sealing and structural stability, while the modular slot connection facilitates maintenance, effectively improving the reliability and material distribution efficiency of the economizer pneumatic ash conveying system.

[0019] 2. In this utility model, the gears, racks, and springs inside the airflow distribution mechanism work together to achieve precise adjustment and stable control of the airflow in the ash conveying pipeline. The matching width of the gears and racks ensures uniform force transmission, and the symmetrical arrangement of the double springs provides stable reset force and buffer protection, enhancing the system's vibration resistance and dynamic response capability. The airflow plate, in conjunction with the symmetrical slide rails, ensures the accuracy of linear motion, optimizes sealing performance, and ensures uniform airflow distribution, effectively improving the stability and reliability of the ash conveying system and reducing maintenance costs. Attached Figure Description

[0020] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0021] Figure 1 This is a three-dimensional appearance structure diagram of the present utility model;

[0022] Figure 2 This is a three-dimensional appearance structural diagram of the first cross section of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional appearance structure of the second section of this utility model;

[0024] Figure 4 This is a three-dimensional appearance diagram of the material distribution airflow mechanism of this utility model;

[0025] Figure 5 This is a three-dimensional appearance diagram of the material distribution mechanism of this utility model.

[0026] In the diagram: 1. Machine body; 2. Ash conveying pipe; 3. Feed pipe; 4. Economizer body; 5. Large motor; 6. Fan blade; 7. Material distribution mechanism; 71. Material distribution box; 72. Box cover; 73. Small motor; 74. Shaft 1; 75. Active dial; 76. Locking protrusion; 77. Shaft 2; 78. Driven grooved wheel; 79. Discharge pipe; 710. Material distribution plate; 8. Airflow distribution mechanism; 81. Gear; 82. Slide groove; 83. Sliding block; 84. Rack; 85. Spring; 86. Connecting rod; 87. Airflow plate. Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0028] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0029] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between 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.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-5 As shown, it illustrates a pneumatic ash conveying pipe structure for an economizer in one embodiment of the present invention, comprising: a body 1, an ash conveying pipe 2 fixedly connected to the side of the body 1, a feed pipe 3 fixedly connected to the top of the body 1, an economizer body 4 fixedly connected to the top of the feed pipe 3, a large motor 5 fixedly connected to the inner wall of the ash conveying pipe 2, a fan blade 6 fixedly connected to the end of the output shaft of the large motor 5, and a material distribution mechanism 7 provided on the side of the feed pipe 3;

[0032] The material distribution mechanism 7 includes a material distribution box 71, the side of which is fixedly connected to one end of the feed pipe 3. A box cover 72 is bolted to the side of the material distribution box 71. A small motor 73 is fixedly connected to the inner wall of the machine body 1. A rotating shaft 74 is fixedly connected to the output shaft of the small motor 73. An active dial 75 is fixedly connected to the end of the rotating shaft 74 away from the small motor 73. A locking protrusion 76 is fixedly connected to the side of the active dial 75. A rotating shaft 77 is rotatably connected to the inner wall of the material distribution box 71. A driven grooved wheel 78 is fixedly connected to one end of the rotating shaft 77. A material distribution plate 710 is snapped onto the circumferential surface of the rotating shaft 77. A discharge pipe 79 is fixedly connected to the bottom of the material distribution box 71.

[0033] In some examples, the cover 72 is bolted to the side with screws. The number of screws is set to several and they are symmetrical about each other along the vertical central axis of the cover 72. Through the multiple symmetrically arranged screws, the contact surface between the cover 72 and the distribution box 71 can be evenly pressed, avoiding deformation or gaps caused by unilateral force.

[0034] The number of material distribution plates 710 is set to a certain extent and is arranged in a circumferential array on the circumferential surface of the rotating shaft 77. The circumferential surface of the rotating shaft 77 is provided with a certain number of slots, which are also arranged in a circumferential array on the circumferential surface of the rotating shaft 77. The multiple material distribution plates 710 are evenly distributed along the circumference and form independent material cavities when the rotating shaft 77 rotates. The intermittent movement of the driven groove wheel 78 matches the number of material distribution plates 710, corresponding to the feeding and unloading cycle of one material cavity, ensuring uniform material conveying.

[0035] The bottom of the feed pipe 3 passes through the side of the distribution box 71, and the bottom of the feed pipe 3 is located above the distribution plate 710. The top of the discharge pipe 79 passes through the bottom of the distribution box 71, and the top of the discharge pipe 79 is located below the distribution plate 710, so that the material can be stably accumulated in the space between the distribution plates 710, avoiding the accumulation of material at the bottom of the distribution box 71 due to the feed position being too low, which would affect the normal operation of the distribution mechanism 7. When the distribution plate 710 rotates to a specific angle with the rotating shaft 77, the material in the distribution plate 710 will fall into the discharge pipe 79 due to gravity and eventually enter the ash conveying pipe 2.

[0036] The driven groove wheel 78 has a number of slots arranged in a circumferential array on its side. The diameter of the locking protrusion 76 is equal to the width of the slot. When the locking protrusion 76 is fully embedded in the slot, the driven groove wheel 78 is precisely positioned, ensuring the stability of the material distribution plate 710 in the feeding and unloading positions. The radius of the active dial 75 is equal to the radius of the arc groove of the driven groove wheel 78. When the driven groove wheel 78 stops rotating, the arc surface contacts to prevent the driven groove wheel 78 from rotating unexpectedly due to external force, ensuring the stability of the material distribution process.

[0037] For example, such as Figures 1-5As shown, the operator remotely controls the small motor 73 to drive the rotating shaft 74 to rotate, which in turn drives the active dial 75 to rotate. The locking protrusion 76 on the active dial 75 periodically engages with the slots of the driven groove wheel 78, causing the driven groove wheel 78 to rotate intermittently. This, in turn, drives the rotating shaft 77 and the circular array of material distribution plates 710 to move synchronously. When the material distribution plate 710 rotates to below the feed pipe 3, the material falls into the material cavity formed by the adjacent material distribution plate 710. When it continues to rotate to above the discharge pipe 79, the material is discharged due to gravity. By controlling the number of slots of the driven groove wheel 78 and the rotation speed of the active dial 75, the quantitative conveying and uniform distribution of the material can be achieved, effectively avoiding blockage of the feed pipe 3 and improving the ash conveying efficiency.

[0038] like Figures 1-5 As shown, this invention illustrates a pneumatic ash conveying pipeline structure for an economizer in another embodiment of the present invention. The technical solution is largely the same as that of Embodiment 1, so only the differences are described. This includes: an airflow distribution mechanism 8, which includes a gear 81; a groove 82 is provided on the inner wall of the body 1; a slider 83 is slidably connected to the inner wall of the groove 82; a rack 84 is fixedly connected to the side of the slider 83; the gear 81 and the rack 84 mesh with each other; a spring 85 is fixedly connected to the bottom of the rack 84; the end of the spring 85 away from the rack 84 is fixedly connected to the inner wall of the body 1; a connecting rod 86 is fixedly connected to the side of the rack 84; an airflow plate 87 is fixedly connected to the end of the connecting rod 86 away from the rack 84; and the side of the airflow plate 87 is slidably connected to the inner wall of the ash conveying pipeline 2.

[0039] In some examples, the arrangement also includes two springs 85, symmetrically positioned along the vertical central axis of the rack 84, with the tops of the springs 85 located on the displacement trajectory of the rack 84, ensuring a uniform elastic force during the up-and-down movement of the rack 84. When the gear 81 drives the rack 84 downward, the springs 85 are compressed and store elastic potential energy; when the gear 81 rotates in the opposite direction, the springs 85 release energy to push the rack 84 back to its original position.

[0040] The gear 81 has spokes on its side, and the number of spokes is set to a certain number and arranged in a circumferential array on the side of the gear 81. The redundant material on the side of the gear 81 is removed, which significantly reduces the rotational inertia of the gear 81. When the small motor 73 drives the gear 81, the smaller inertia makes starting and braking faster and reduces energy loss.

[0041] A sliding strip is fixedly connected to the side of the airflow plate 87, and a slide rail is provided on the inner wall of the ash conveying pipe 2. There are two sliding strips and slide rails, which are symmetrical to each other along the vertical central axis of the airflow plate 87. The two symmetrical sliding strips and slide rails form a linear guide rail system, which strictly constrains the movement trajectory of the airflow plate 87, so that it can only slide in a straight line along the inner wall of the ash conveying pipe 2, and avoids angular deviation caused by airflow impact or deflection of the connecting rod 86.

[0042] The width of gear 81 is equal to the width of rack 84, avoiding tooth surface wear or fatigue fracture caused by localized stress concentration. Especially in high-load pneumatic ash conveying systems, this significantly extends the life of transmission components. The width of connecting rod 86 is equal to the width of airflow plate 87, ensuring that the thrust transmitted by spring 85 through rack 84 is evenly distributed across the entire cross-section of airflow plate 87. This prevents airflow plate 87 from bending and deforming due to uneven stress, ensuring its flatness and sealing performance when adjusting wind speed.

[0043] For example, such as Figures 1-5 As shown, the material flows into the ash conveying pipe 2 through the discharge pipe 79. The operator remotely controls the large motor 5 to drive the fan blades 6 to rotate, forming a transport airflow in the ash conveying pipe 2. The small motor 73 drives the rotating shaft 74 to rotate, and the gear 81 on it meshes with the rack 84. The sliding connection between the slider 83 and the slide groove 82 converts the rotational motion into the linear motion of the rack 84. The spring 85 provides the restoring force for the rack 84. The rack 84 pushes the airflow plate 87 to slide in the ash conveying pipe 2 through the connecting rod 86, changing the cross-sectional area of ​​the airflow in the pipe, thereby adjusting the wind speed.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pneumatic ash conveying duct structure for an economizer, characterized by, Includes a machine body (1), a conveying pipe (2) is fixedly connected to the side of the machine body (1), a feed pipe (3) is fixedly connected to the top of the machine body (1), an economizer body (4) is fixedly connected to the top of the feed pipe (3), a large motor (5) is fixedly connected to the inner wall of the conveying pipe (2), a fan blade (6) is fixedly connected to the end of the output shaft of the large motor (5), and a material distribution mechanism (7) is provided on the side of the feed pipe (3). The material distribution mechanism (7) includes a material distribution box (71), the side of which is fixedly connected to one end of the feed pipe (3), and a box cover (72) is bolted to the side of the material distribution box (71). A small motor (73) is fixedly connected to the inner wall of the machine body (1). A rotating shaft (74) is fixedly connected to the output shaft of the small motor (73). An active dial (75) is fixedly connected to the end of the rotating shaft (74) away from the small motor (73). A locking protrusion (76) is fixedly connected to the side of the active dial (75). A rotating shaft (77) is rotatably connected to the inner wall of the material distribution box (71). A driven grooved wheel (78) is fixedly connected to one end of the rotating shaft (77). A material distribution plate (710) is snapped onto the circumferential surface of the rotating shaft (77). A discharge pipe (79) is fixedly connected to the bottom of the material distribution box (71).

2. A structure of a pneumatic ash conveying pipeline for an economizer according to claim 1, wherein The side of the box cover (72) is bolted with screws, and the number of screws is set to several, and they are symmetrical to each other along the vertical central axis of the box cover (72).

3. A structure of a pneumatic ash conveying pipeline for an economizer according to claim 2, wherein The number of the material distribution plates (710) is set to a certain number and they are arranged in a circular array on the circumferential surface of the rotating shaft two (77). The circumferential surface of the rotating shaft two (77) is provided with a slot, and the number of the slots is set to a certain number and they are arranged in a circular array on the circumferential surface of the rotating shaft two (77).

4. A structure of a pneumatic ash conveying pipeline for an economizer according to claim 3, wherein The bottom of the feed pipe (3) penetrates the side of the distribution box (71), the bottom of the feed pipe (3) is located above the distribution plate (710), the top of the discharge pipe (79) penetrates the bottom of the distribution box (71), and the top of the discharge pipe (79) is located below the distribution plate (710).

5. The pneumatic ash conveying pipeline structure for an economizer according to claim 4, characterized in that, The driven groove wheel (78) has a slot on its side. The number of slots is set to several and they are arranged in a circumferential array on the side of the driven groove wheel (78). The diameter of the locking protrusion (76) is equal to the width of the slot. The radius of the driving dial (75) is equal to the radius of the arc groove of the driven groove wheel (78).

6. A structure of a pneumatic ash conveying pipeline for an economizer according to claim 5, wherein An airflow distribution mechanism (8) is provided on the side of the rotating shaft (74). The airflow distribution mechanism (8) includes a gear (81). A groove (82) is provided on the inner wall of the machine body (1). A slider (83) is slidably connected to the inner wall of the groove (82). A rack (84) is fixedly connected to the side of the slider (83). The gear (81) and the rack (84) mesh with each other. A spring (85) is fixedly connected to the bottom of the rack (84). The end of the spring (85) away from the rack (84) is fixedly connected to the inner wall of the machine body (1). A connecting rod (86) is fixedly connected to the side of the rack (84). An airflow plate (87) is fixedly connected to the end of the connecting rod (86) away from the rack (84). The side of the airflow plate (87) is slidably connected to the inner wall of the ash conveying pipe (2).

7. A structure of a pneumatic ash conveying pipeline for an economizer according to claim 6, wherein The springs (85) are provided in two quantities and are symmetrical to each other along the vertical central axis of the rack (84). The top of the springs (85) is located on the displacement trajectory of the rack (84).

8. A structure of a pneumatic ash conveying pipeline for an economizer according to claim 7, wherein The gear (81) has spokes on its side, and the number of spokes is set to several and arranged in a circumferential array on the side of the gear (81).

9. A structure of a pneumatic ash conveying pipeline for an economizer according to claim 8, characterized in that, The airflow plate (87) is fixedly connected to a sliding strip on its side, and the inner wall of the ash conveying pipe (2) is provided with a sliding rail. There are two sliding strips and two sliding rails, which are symmetrical to each other along the vertical central axis of the airflow plate (87).

10. A structure of a pneumatic ash conveying duct for an economizer according to claim 9, wherein The width of the gear (81) is equal to the width of the rack (84), and the width of the connecting rod (86) is equal to the width of the airflow plate (87).

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