Inverted V-shaped curved surface fluid ash deposition prevention device with symmetrically arranged air ducts

Abstract

The invention discloses a herringbone curved surface fluid ash deposition prevention device with symmetrically arranged air flues, the two ends of the symmetrical air flues are air inlets, the two sides of the symmetrical air flues are a C1 side and a C2 side respectively, air outlets are formed in the A side and the B side and are opposite to the A side, the herringbone curved surface fluid ash deposition prevention device comprises an ash deposition body, and the two ends of the ash deposition body abut against the A side and the B side respectively. The dust deposition body comprises a stable frame and a plurality of shielding plates, the shielding plates are arranged on the stable frame, the first end of the stable frame is located at the 1 / 3 section height of the side A, the second end of the stable frame is located at the 2 / 3 section height of the side B, the second end of the stable frame obliquely extends towards the first end, and the first end of the stable frame is located at the 1 / 3 section height of the side A; and the fluid flow is fully utilized to generate rotational flow to take away the accumulated dust. The inverted-Y-shaped curved surface fluid ash deposition prevention device with the symmetrically-arranged air ducts has the advantage of weakening and eliminating ash deposition in the air ducts.

Description

Technical Field

[0001] This invention relates to the field of air supply and cleaning technology, and in particular to a human-shaped curved surface anti-dust accumulation device with symmetrically arranged air ducts. Background Technology

[0002] Thermal power plants are equipped with blowers as the air supply equipment for combustion. Most thermal power plants use rotary air preheaters. The fresh air passing through the air preheater inevitably carries a small amount of fly ash into the air supply duct. From a safety perspective, the air supply system of large thermal power plants adopts a two-way symmetrical arrangement. Over a long period of operation, a large amount of fly ash accumulates at the midpoint of the symmetrically arranged air duct. Dust accumulation in the air duct not only affects safety but also economics. Currently, the dust accumulation is removed by manual cleaning during maintenance, which is inefficient and burdensome. Summary of the Invention

[0003] This invention is based on the inventor's discoveries and understanding of the following facts and problems: Dust accumulation inside the ventilation ducts poses a safety risk, and manual cleaning is costly.

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] To address this, embodiments of the present invention propose a "human-shaped" curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts. The two ends of the symmetrical air ducts are air inlets, and the two sides of the symmetrical air ducts are C1 and C2, respectively. The air outlet is located on side A, with side B opposite to side A. The device includes a dust accumulation body, with its two ends abutting against sides A and B, respectively. The dust accumulation body includes a stabilizing frame and multiple baffles. The baffles are arranged on the stabilizing frame. The first end of the stabilizing frame is located at 1 / 3 of the cross-sectional height on side A, and the second end of the stabilizing frame is located at 2 / 3 of the cross-sectional height on side B. The second end of the stabilizing frame extends obliquely towards the first end, and the second end of the frame connects to the edge of the air outlet opening adjacent to side A, fully utilizing the fluid flow to generate a swirling flow that carries away the accumulated dust.

[0006] The present invention provides advantages and technical effects in reducing and eliminating ash accumulation in air ducts. This application simulates the shape of accumulated ash and uses baffles to provide support when the airflow direction changes in a symmetrically arranged air duct, thereby altering the airflow direction and preventing the airflow velocity from weakening due to the opposing air supply on both sides of the symmetrical arrangement, thus preventing the air from carrying fly ash and depositing. This eliminates safety hazards caused by the weight of accumulated ash, avoids the heavy workload of manual ash removal, and saves on manual ash removal costs.

[0007] In some embodiments, the projected area of ​​the ash accumulation body on the horizontal plane of the symmetrical air duct is less than half the cross-sectional area of ​​the symmetrical air duct.

[0008] In some embodiments, the projection area of ​​the ash-accumulating body on the horizontal plane of the symmetrical air duct covers the area where ash is easily formed at the geometric center of the symmetrical air duct.

[0009] In some embodiments, the stabilizing frame includes at least two sets of support rods, one set of support rods having its end extending from a point on side B toward the top and inclined toward side A, the set of support rods being spaced a certain distance from the adjacent set of support rods on side B, and a plurality of baffles being sequentially spliced ​​together along the inclined direction of the stabilizing frame to form a continuous inverted V-shaped guide surface.

[0010] In some embodiments, adjacent sets of support rods are fixedly connected by a transverse connecting rod.

[0011] In some embodiments, the inverted V-shaped guide surface includes a first airflow surface and a second airflow surface. Both the first airflow surface and the second airflow surface have a certain curve to form a continuous and smooth streamlined surface. The first airflow surface and the second airflow surface are mirror images of each other with the geometric center line of the symmetrical air duct as the axis of symmetry.

[0012] This application utilizes a specially positioned and angled dust-collecting body to guide airflow smoothly and maintain its velocity, preventing dust accumulation at its source while ensuring efficient airflow through the duct and eliminating the cost of manual dust removal. It precisely covers areas prone to dust accumulation while providing ample space for airflow, balancing dust prevention with airflow resistance, preventing increased energy consumption, and acting directly on the source of dust accumulation. This achieves highly efficient dust prevention without excessive extension, reducing material usage and airflow resistance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a "human"-shaped curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts according to an embodiment of the present invention.

[0014] Attached diagram labels: 1. Air outlet; 2. Dust accumulation body; 3. Symmetrical air duct. Detailed Implementation

[0015] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0016] An embodiment of the present invention provides a "human"-shaped curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts. The two ends of the symmetric air ducts are air inlets, and the two sides of the symmetric air ducts are the C1 side and the C2 side respectively. The air outlet 1 is arranged on the A side, and the B side is opposite to the A side. It includes a dust accumulation body 2. The two ends of the dust accumulation body 2 are respectively abutted against the A side and the B side. The dust accumulation body 2 includes a stable frame and a plurality of baffle plates. The baffle plates are arranged on the stable frame. The first end of the stable frame is at the 1 / 3 cross-section height on the A side, and the second end of the stable frame is at the 2 / 3 cross-section height on the B side. The second end of the stable frame extends obliquely towards the first end, and the second end of the frame is connected to the edge of the opening near the air outlet on the A side, making full use of the swirling flow generated by the fluid flow to carry away the dust accumulation. As Figure 1 shown, the air inlets on both sides are the C1 and C2 sides respectively. Figure 1 As shown, the projections of the A and B sides present a "human" shape projection. The two waistlines are curves with a slightly downward arc. The fluid traction force in the B-to-A direction is formed by using the arc surface to achieve automatic dust cleaning. The specific arc depends on the shape of the dust accumulation body. The average height should not be greater than 1 / 2 of the cross-sectional area to meet the flow rate during single-end air supply.

[0017] The structure with air inlets arranged at both ends of the symmetric air ducts, the air outlet 1 arranged on the A side and the B side opposite to the A side provides a basic channel for the confluence flow of air inlet from both sides. The two ends of the dust accumulation body 2 are respectively abutted against the A side and the B side, which can ensure that the device covers the core area where the air flow in the air duct is easy to counteract and dust accumulation is easy to form, and avoid local dust accumulation caused by the bypass of air flow from the gap between the device and the side wall of the air duct. The first end of the stable frame is fixed at the 1 / 3 cross-section height on the A side, the second end is fixed at the 2 / 3 cross-section height on the B side and extends obliquely towards the first end to adapt to the turning trajectory of the air flow in the symmetric air duct from the air inlets on both sides to the air outlet 1 on the A side. It not only provides a stable installation support for the baffle plates, but also guides the air flow to turn naturally through the inclination angle. The continuous diversion structure formed by arranging a plurality of baffle plates on the stable frame can承接并引导两侧进风,避免传统对称风道中两侧气流汇流时发生直接对冲导致的流速骤降粉尘堆积,让气流在改变方向的同时保持稳定流速,进而持续携带粉煤灰顺利从A侧出风口1排出,从根源上消除积灰堆积带来的安全隐患,又省去定期人力清灰的繁琐工作和经济成本,同时稳定框架的特定安装高度和倾斜延伸方式,不会过度占用风道流通空间,保障了风道原有的送风效率,确保燃烧所需风量供应不受影响。遮挡板可选择高于流体温度的耐磨钢板。

[0018] In some embodiments, the projected area of the dust accumulation body 2 on the horizontal plane of the symmetric air duct is less than one-half of the cross-sectional area of the symmetric air duct.

[0019] It should be noted that there seems to be some text repetition and unclear parts in the original Chinese text, which may affect the accuracy of translation. I have tried my best to translate it according to the requirements. If possible, it is recommended to clarify and optimize the original text for a more accurate translation result.Specifically, the projected area of ​​the ash-collecting body 2 on the horizontal plane of the symmetrical air duct is less than half the cross-sectional area of ​​the horizontal plane of the symmetrical air duct. This ensures that the ash-collecting body 2 accurately covers the high-accumulation area of ​​ash at the geometric center of the air duct, fully utilizing its function of guiding airflow and preventing ash accumulation. At the same time, it also reserves sufficient flow space for airflow, avoiding a significant increase in airflow resistance and energy consumption due to the device occupying too much air duct cross-section. This achieves both ash prevention and smooth airflow. Furthermore, the reasonable proportion of the projected area ensures that the air intake on both sides will not experience sudden changes in wind speed due to excessively narrow channels, preventing local eddies, and will not miss ash-collecting areas due to insufficient coverage. While blocking ash accumulation, it maintains the original air supply efficiency of the air duct, ensuring that sufficient fresh air is delivered to the combustion equipment to meet combustion requirements, achieving efficient synergy between the ash prevention function and the basic air supply function of the air duct.

[0020] In some embodiments, the projection area of ​​the ash-accumulating body 2 onto the horizontal plane of the symmetrical air duct covers the area where ash is easily formed at the geometric center of the symmetrical air duct.

[0021] Specifically, the ash-collecting body 2 precisely covers the ash-accumulation-prone area at the geometric center of the symmetrical air duct in its projected area on the horizontal plane. This design closely follows the ash formation pattern of the symmetrical air duct—when the air from both sides converges at the geometric center, it is prone to collision, resulting in a decrease in flow velocity and thus triggering fly ash deposition. The targeted coverage of the projected area allows the flow-guiding structure of the ash-collecting body 2 to directly act on the root of ash accumulation, enabling the flow-guiding surface formed by the baffle plate to accurately receive and guide the airflow in that area, avoiding a reduction in the ash-prevention effect due to the flow-guiding range deviating from the high-incidence area of ​​ash accumulation. At the same time, this precise coverage design does not require the ash-collecting body 2 to extend excessively to achieve the core ash-prevention function, which reduces the amount of equipment materials used, lowers installation costs and airflow resistance in the air duct, and ensures that the flow-guiding effect is concentrated on the key area, allowing the airflow to smoothly turn in the ash-accumulation-prone area without losing flow velocity, continuously carrying fly ash out. While ensuring the ash-prevention efficiency, it further takes into account the air supply stability and economy of the air duct.

[0022] In some embodiments, the stabilizing frame includes at least two sets of support rods. The ends of one set of support rods extend from a point on side B toward the top and extend obliquely toward side A. One set of support rods is spaced a certain distance from the adjacent set of support rods on side B. Multiple baffles are spliced ​​sequentially along the oblique direction of the stabilizing frame to form a continuous inverted V-shaped guide surface.

[0023] Specifically, the stabilizing frame is equipped with at least two sets of support rods, which provide stable and uniform support for the entire ash collection body 2. This prevents deformation of a single support rod due to airflow impact or ash load within the duct, ensuring the structural reliability of the device during long-term operation. One set of support rods extends from a point on side B towards the top and then tilts towards side A to conform to the contour of the inverted V-shaped guide surface. This ensures that the force direction of the support rod matches the airflow direction, reducing airflow impact loss on the frame. The top-extending structure enhances the overall load-bearing capacity of the frame, ensuring that the baffle plate will not loosen due to uneven stress after installation. One set of support rods is spaced a certain distance from the adjacent set on side B. The spacing can be flexibly adjusted according to the duct width, ash volume, and other actual working conditions. This ensures comprehensive support of the baffle plate by the frame, preventing deformation due to lack of local support that could affect the airflow guiding effect, while also preventing excessively dense support rods from increasing airflow resistance. Multiple baffles are sequentially spliced ​​along the inclined direction of the stable frame to form a continuous inverted V-shaped guide surface, which is adapted to the convergence trajectory of the air intake on both sides of the symmetrical air duct. The inverted V-shaped structure allows the airflow entering from the C1 and C2 sides to smoothly turn along the guide surface, avoiding direct collision of airflows on both sides at the geometric center. The continuous splicing method eliminates gaps and protrusions in the guide surface, preventing local eddies from causing ash accumulation. At the same time, this structure ensures that the airflow maintains a stable velocity when changing direction, ensuring that fly ash can be continuously carried out. While achieving efficient ash prevention, it also takes into account the structural stability of the frame and the smooth air supply of the air duct.

[0024] In some embodiments, adjacent sets of support rods are fixedly connected by a transverse connecting rod.

[0025] Specifically, adjacent sets of support rods are fixedly connected by transverse connecting rods, linking multiple independently arranged support rods together to form an integrated load-bearing structure. This significantly improves the overall rigidity and deformation resistance of the stable frame, preventing individual support rods from shifting, bending, or loosening under the continuous airflow impact and dust accumulation load within the duct. The transverse connecting rods also ensure more even force transmission among multiple support rods, effectively dispersing localized concentrated loads and preventing structural damage caused by overload of individual support rods. Furthermore, the connecting rods reinforce the installation foundation of the baffle plate, ensuring that the baffle plate always maintains the preset tilt angle and splicing flatness. This prevents gaps, protrusions, or misalignments in the guide surface caused by frame deformation, guaranteeing the structural integrity and guide trajectory stability of the inverted V-shaped guide surface.

[0026] In some embodiments, the inverted V-shaped guide surface includes a first airflow surface and a second airflow surface. Both the first airflow surface and the second airflow surface have a certain curve to form a continuous and smooth streamlined surface. The first airflow surface and the second airflow surface are mirror images of each other with the geometric center line of the symmetrical air duct as the axis of symmetry.

[0027] Specifically, the airflows entering from the C1 and C2 sides can flow across the wind surface respectively, avoiding direct collision when the airflows from both sides converge from the source; both adopt a continuous smooth streamlined surface with a specific curve, which can minimize the airflow resistance and guide the airflow to gradually and naturally turn along the surface, rather than suddenly changing the flow direction, effectively avoiding sudden changes in airflow velocity and energy loss, and ensuring that the airflow always maintains sufficient carrying capacity.

[0028] The continuous and smooth curved surface eliminates the bulges, gaps and other structures on the air passage that are prone to ash accumulation, preventing local eddies from causing fly ash deposition. At the same time, it allows the airflow after turning on both sides to flow smoothly into the air outlet 1 on side A, which fully matches the airflow characteristics of the symmetrical air duct.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A "human"-shaped curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts, wherein the two ends of the symmetrical air ducts are air inlets, the two sides of the symmetrical air ducts are C1 side and C2 side respectively, the air outlet is arranged on side A, and side B is opposite to side A, characterized in that, include: The ash-collecting body has two ends that abut against side A and side B, respectively. The ash-collecting body includes a stabilizing frame and multiple baffles. The baffles are arranged on the stabilizing frame. The first end of the stabilizing frame is located at 1 / 3 of the cross-sectional height on side A, and the second end of the stabilizing frame is located at 2 / 3 of the cross-sectional height on side B. The second end of the stabilizing frame extends inclined towards the first end and connects with the edge of the air outlet opening adjacent to side A, making full use of fluid flow to generate swirling flow to carry away the ash.

2. The "human"-shaped curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts according to claim 1, characterized in that, The projected area of ​​the ash-accumulating body on the horizontal plane of the symmetrical air duct is less than half the cross-sectional area of ​​the symmetrical air duct.

3. The "human"-shaped curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts according to claim 2, characterized in that, The ash-accumulating body's projection area on the horizontal plane of the symmetrical air duct covers the area where ash easily forms at the geometric center of the symmetrical air duct.

4. The "human"-shaped curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts according to claim 3, characterized in that, The stabilizing frame includes at least two sets of support rods. The end of one set of support rods extends from a point on side B towards the top and extends obliquely towards side A. One set of support rods is spaced a certain distance from the adjacent set of support rods on side B. Multiple baffles are spliced ​​together sequentially along the oblique direction of the stabilizing frame to form a continuous inverted V-shaped guide surface.

5. The "human"-shaped curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts according to claim 4, characterized in that, The two adjacent sets of support rods are fixedly connected by a transverse connecting rod.

6. The "human"-shaped curved surface fluid anti-dust accumulation device with symmetrically arranged air ducts according to claim 5, characterized in that, The inverted V-shaped guide surface includes a first air passage surface and a second air passage surface. Both the first and second air passage surfaces have a certain curve to form a continuous and smooth streamlined surface. The first and second air passage surfaces are mirror images of each other with the geometric center line of the symmetrical air duct as the axis of symmetry.

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