Chimney and flue integrated structure

Abstract

The invention discloses a chimney and flue integrated structure which comprises a chimney which is not horizontally arranged and comprises a chimney outer cylinder and at least one chimney inner cylinder. The flue comprises a flue bending section, one end of the flue bending section is connected with an absorption tower arranged outside the chimney outer barrel, the other end of the flue bending section penetrates through the chimney outer barrel and is connected with the chimney inner barrel, and the flue bending section is connected with the chimney inner barrel to form a continuous non-horizontal flue structure. A continuous non-horizontal flue structure is adopted, a traditional horizontal clean flue is completely replaced, and the ash deposition problem of a horizontal section is fundamentally avoided. The flue bending section and the chimney inner cylinder form a continuous and smooth non-horizontal channel, the flue gas flowing path is optimized, the flue gas flowing path better conforms to the fluid mechanics principle, and the flue gas flowing resistance is reduced. The structure defect that a horizontal flue is prone to water accumulation is overcome, flue gas can rapidly flow in a non-horizontal channel, and condensate water accumulation is avoided.

Description

Technical Field

[0001] This invention relates to the field of flue gas emission equipment technology, specifically to an integrated structure of chimney and flue. Background Technology

[0002] In existing flue gas emission systems, the absorber tower outlet is typically connected to the chimney inner liner via a horizontal clean flue. This traditional structure has several drawbacks: firstly, the horizontal flue requires additional consideration of ash accumulation load, increasing the complexity and cost of structural design; secondly, the high flue gas flow resistance in the horizontal flue increases fan energy consumption and operating costs. Furthermore, with increased operating time, water leakage often occurs in the horizontal flue, affecting the normal operation of the equipment. Summary of the Invention

[0003] In view of this, the present invention provides an integrated chimney and flue structure to solve the problems of existing absorption tower outlets, which are usually connected to the inner cylinder of the chimney through a horizontal clean flue, which easily leads to ash accumulation, high resistance to flue gas flow, and water leakage.

[0004] This invention provides an integrated chimney and flue structure, comprising:

[0005] A chimney, wherein the chimney is not horizontally arranged, the chimney includes an outer chimney and at least one inner chimney, the inner chimney being disposed inside the outer chimney and connected to the outer chimney. At least one flue, the flue including a flue bend, one end of the flue bend being connected to an absorption tower arranged outside the outer casing of the chimney, the other end of the flue bend passing through the outer casing of the chimney and connecting to the inner casing of the chimney, the flue bend and the inner casing of the chimney forming a continuous non-horizontal flue structure.

[0006] The beneficial effects of the above-mentioned integrated chimney and flue structure are as follows: This invention employs a continuous, non-horizontal flue structure, completely replacing the traditional horizontal flue. This fundamentally avoids the problem of ash accumulation in horizontal sections, while also reducing the need for cleaning and maintenance, and lowering long-term operating costs. The curved section of the flue forms a continuous and smooth non-horizontal channel with the inner cylinder of the chimney, optimizing the flue gas flow path. This flow path is more in line with fluid mechanics principles, reducing flue gas flow resistance.

[0007] This invention eliminates the structural defects of horizontal flues that are prone to water accumulation. Flue gas can flow rapidly in non-horizontal channels, preventing condensation buildup. Combined with a continuously sealed flue design, it reduces equipment corrosion and downtime caused by water leakage, improving system operational stability.

[0008] In this invention, the curved section of the flue directly penetrates into the outer casing of the chimney and connects with the inner casing, eliminating the need to occupy additional ground space for the horizontal flue and resulting in a more compact structural layout.

[0009] In one optional embodiment, the flue curvature section includes a first curvature section, an adjusting straight section, and a second curvature section connected in sequence. The first curvature section is located outside the outer casing of the chimney and is horizontally limited to the flue outlet of the absorption tower. The second curvature section is located inside the outer casing of the chimney and is connected to the inner casing of the chimney. The first curvature section, the adjusting straight section, and the second curvature section are all vertically supported on the outer casing of the chimney.

[0010] The beneficial effects of the above technical solution are as follows: the length and direction of the straight section can be flexibly set according to the actual spatial distance and relative position between the absorption tower and the chimney, effectively adapting to the layout differences of different scenarios and improving the versatility and adaptability of the structure; the first and second curved sections are connected by adjusting the straight section, making the flow field transition smoother as the flue gas enters the chimney from the absorption tower outlet, further reducing local resistance loss and reducing system energy consumption; the segmented structural design facilitates factory prefabrication and on-site modular installation of each section, shortening the construction cycle; at the same time, each section can be inspected and maintained independently without disassembling the entire flue, improving the convenience and efficiency of later operation and maintenance, and reducing system downtime caused by maintenance.

[0011] In one optional embodiment, the first and second curved sections are arranged symmetrically about the straight section, and the center of gravity of the curved section is located at the geometric center of the straight section, which can make the stress on the curved section of the flue uniformly distributed and avoid local stress concentration.

[0012] In one alternative embodiment, the bending angle of the first and second bending segments is 60°.

[0013] The beneficial effects of the above technical solution are as follows: a new type of structure is formed by combining two 60° bends and an adjusting straight section. This structure has no dust accumulation and can reduce flue resistance by at least 50%, while also significantly reducing the probability of flue dripping.

[0014] In one alternative implementation, the radii of curvature of the first and second curved segments are twice their diameters, respectively.

[0015] In one alternative embodiment, the inner cylinder of the chimney is arranged vertically, and the curved section of the flue smoothly connects upward from the flue outlet of the absorption tower to the bottom end of the inner cylinder of the chimney.

[0016] In one alternative embodiment, the outer casing of the chimney is arranged vertically.

[0017] In one optional embodiment, the portion of the flue bend located inside the chimney outer casing is connected to the inner wall of the chimney outer casing via an internal chimney support frame, and the portion of the flue bend located outside the chimney outer casing is connected to the outer wall of the chimney outer casing via an external chimney support frame. Furthermore, a swing support rod is provided between the portion of the flue bend located outside the chimney outer casing and the outer wall of the chimney outer casing.

[0018] The beneficial effects of the above technical solution are as follows: through the dual support of the inner and outer support frames of the chimney, the load of the flue bend section can be evenly transferred to the inner and outer walls of the chimney, avoiding the occurrence of local stress concentration; at the same time, this support method enhances the connection stiffness between the flue bend section and the chimney, and all vertical loads of the integrated flue are borne by the chimney wall, improving the overall stability of the integrated structure, effectively resisting the influence of external loads such as wind and earthquakes on the structure, preventing the flue bend section from disrupting the continuity of the flow field due to deformation, and ensuring the stability of the flue gas exhaust efficiency.

[0019] In one optional embodiment, a first expansion joint is provided at the connection position between the flue bend and the inner cylinder of the chimney, and a second expansion joint is provided at the connection position between the flue bend and the absorption tower.

[0020] In one alternative embodiment, two flues are provided, and the two flues are arranged symmetrically about the vertical central axis of the chimney. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an integrated chimney and flue structure provided by the present invention; Figure 2 A schematic diagram of the curved section of the flue in an integrated chimney and flue structure provided by the present invention; Figure 3 A plan view of the curved section of the flue in an integrated chimney and flue structure provided by the present invention; Figure 4 This is the European standard table for drag coefficients.

[0023] Explanation of reference numerals in the attached figures: 1. Flue; 11. Flue bend; 111. First bend; 112. Second bend; 113. Adjustment straight section; 2. Absorption tower; 3. Chimney; 31. Chimney outer cylinder; 32. Chimney inner cylinder; 4. First expansion joint; 5. Second expansion joint; 6. Chimney inner support frame; 7. Chimney outer support frame; 8. Fixed support; 9. Swing support rod. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0025] The specific embodiments of the present invention will be described in detail below with reference to the integrated chimney and flue structure of the present invention.

[0026] According to an embodiment of the present invention, an integrated chimney and flue structure is provided, combined with Figures 1 to 3 As shown, it includes chimney 3 and flue 1.

[0027] The chimney 3 is not horizontally arranged. The chimney 3 includes an outer chimney 31 and at least one inner chimney 32. The inner chimney 32 is located inside the outer chimney 31 and is connected to the outer chimney 31.

[0028] The flue 1 is provided with at least one flue, which includes a flue bend section 11 and a chimney inner cylinder 32. One end of the flue bend section 11 is connected to the absorption tower 2 arranged outside the chimney outer cylinder 31, and the other end of the flue bend section 11 passes through the chimney outer cylinder 31 and is connected to the chimney inner cylinder 32. The flue bend section 11 and the chimney inner cylinder 32 are connected to form a continuous non-horizontal flue structure.

[0029] It should be noted that the inner chimney is connected to the flue 1 via an expansion joint. The bottom of the outer chimney 31 is inserted into the ground for fixation. The inner chimney 32 can be made of steel.

[0030] The aforementioned integrated chimney and flue structure adopts a continuous, non-horizontal flue structure, completely replacing the traditional horizontal clean flue. This fundamentally avoids the problem of ash accumulation in horizontal sections, while reducing the need for ash cleaning and maintenance, and lowering long-term operating costs. The curved section 11 of the flue and the inner cylinder 32 of the chimney form a continuous and smooth non-horizontal channel, optimizing the flue gas flow path. The flue gas flow path is more in line with the principles of fluid mechanics, reducing flue gas flow resistance.

[0031] Furthermore, the integrated chimney and flue structure eliminates the structural defects of horizontal flues that are prone to water accumulation. Flue gas can flow rapidly in the non-horizontal channel, preventing condensation buildup. Combined with the continuously sealed flue design, this reduces equipment corrosion and downtime caused by water leakage, improving system operational stability.

[0032] The curved section 11 of the flue directly penetrates into the outer casing 31 of the chimney and connects with the inner casing 32 of the chimney, without requiring additional ground space for the horizontal flue, resulting in a more compact structural layout.

[0033] In some embodiments, the flue bend section 11 includes a first bend section 111, an adjusting straight section 113, and a second bend section 112 connected in sequence. The first bend section 111, the adjusting straight section 113, and the second bend section 112 are connected to form an S-shaped bend structure. The first bend section 111 is located outside the outer casing 31 of the chimney and is horizontally limited to the flue outlet of the absorption tower 2. The second bend section 112 is located inside the outer casing 31 of the chimney and is connected to the inner casing 32 of the chimney. The first bend section 111, the adjusting straight section 113, and the second bend section 112 are all vertically supported on the outer casing 31 of the chimney.

[0034] In this embodiment, the length and direction of the straight section 113 can be flexibly set according to the actual spatial distance and relative position between the absorption tower 2 and the chimney 3, effectively adapting to the layout differences of different scenarios and improving the versatility and adaptability of the structure. The first curved section 111 and the second curved section 112 are connected by the straight section 113, so that the flow field transition is smoother when the flue gas enters the chimney from the outlet of the absorption tower, further reducing local resistance loss and reducing system energy consumption. The segmented structural design facilitates the factory prefabrication and on-site modular installation of each section, shortening the construction cycle. At the same time, each section can be inspected and maintained independently without disassembling the flue as a whole, improving the convenience and efficiency of later operation and maintenance and reducing system downtime caused by maintenance.

[0035] In some embodiments, the first curved section 111 and the second curved section 112 are symmetrically arranged about the adjusting straight section 113. The center of gravity of the flue curved section 11 is located at the geometric center of the adjusting straight section 113, which can make the force on the flue curved section evenly distributed, avoid local stress concentration, effectively reduce the eccentric load on the chimney support structure, and improve the stability and seismic performance of the overall structure. At the same time, the symmetrical fluid channel design can optimize the flue gas flow field, reduce eddies and flow resistance, and improve the smoke exhaust efficiency.

[0036] In some embodiments, the bending angle of the first bending section 111 and the second bending section 112 is 60°, which makes the flow field transition smoother as the flue gas turns from the outlet of the absorption tower through the first bending section to the straight section and then through the second bending section into the chimney. This reduces the generation of eddies caused by excessive bending angle or the sudden change in local flow velocity caused by excessively small bending angle, further reducing flow resistance loss and improving the system's flue gas exhaust efficiency. At the same time, the 60° bending angle matches the symmetrical arrangement of the structural design, which can optimize the overall stress distribution of the flue, avoid local stress concentration, and enhance the durability and fatigue resistance of the flue structure.

[0037] In this embodiment, a novel structure is formed by combining two 60° bends and an adjusting straight section 113. This structure is dust-free and can reduce flue resistance by at least 50%, while also significantly reducing the probability of flue dripping.

[0038] In some embodiments, the radii of curvature of the first bending segment 111 and the second bending segment 112 are twice their diameters, which can make the transition of the bending segment smoother and effectively disperse the local stress at the bending point.

[0039] according to Figure 4 As shown in the European standard table of drag coefficients, the drag coefficient is minimum at 0.1 when the radius of curvature is twice the diameter. Therefore, when the radii of curvature of the first bend 111 and the second bend 112 are each twice their diameter, the overall drag of the flue on the flue gas is minimum.

[0040] In some embodiments, the chimney inner cylinder 32 is arranged vertically, and the flue bend section 11 is smoothly connected upward from the flue outlet of the absorption tower 2 to the bottom end of the chimney inner cylinder 32. This allows the flue gas to maintain the continuity of the flow field as it flows from the flue outlet of the absorption tower to the chimney inner cylinder, avoiding eddies and energy loss caused by sudden changes in the path, and further improving the flue gas exhaust efficiency. The seamless connection between the vertically arranged chimney inner cylinder 32 and the flue bend section 11 enhances the overall rigidity and stability of the integrated chimney and flue structure.

[0041] In some embodiments, the outer casing 31 of the chimney is arranged vertically, which allows the flue gas to maintain a vertically upward flow direction during the final emission stage.

[0042] In some embodiments, the portion of the flue bend 11 located inside the chimney outer cylinder 31 is connected to the inner wall of the chimney outer cylinder 31 via an inner chimney support frame 6, and the portion of the flue bend 11 located outside the chimney outer cylinder 31 is connected to the outer wall of the chimney outer cylinder 31 via an outer chimney support frame 7. Fixed supports 8 are respectively provided between the outer chimney support frame 7, the chimney outer cylinder 31, and the flue bend 11. The flue bend 11 passes through the inner chimney support frame 6 and is supported on the inner chimney support frame 6.

[0043] Among them, chimney 3 is a concrete chimney, and the chimney duct 1 is integratedly supported by the internal support frame 6 and the external support frame 7 arranged in the chimney.

[0044] In this embodiment, the load of the flue bend section 11 can be evenly transferred to the inner and outer walls of the chimney through the dual support of the inner support frame 6 and the outer support frame 7, avoiding the occurrence of local stress concentration. At the same time, this support method enhances the connection stiffness between the flue bend section and the chimney. All vertical loads of the integrated flue are borne by the outer wall of the chimney, improving the overall stability of the integrated structure, effectively resisting the influence of external loads such as wind and earthquakes on the structure, preventing the flue bend section from disrupting the continuity of the flow field due to deformation, and ensuring the stability of the exhaust efficiency.

[0045] Furthermore, a swing support rod 9 is installed between the portion of the flue bend section 11 located outside the chimney outer cylinder 31 and the outer wall of the chimney outer cylinder 31. This swing support rod 9 adopts a hinged node design, with one end connected to the outer wall of the flue bend section 11 via a hinge seat, and the other end hinged and fixed to the outer wall of the chimney outer cylinder 31. When wind loads or earthquakes cause small relative displacements in the horizontal direction, the swing support rod 9 can buffer vibration energy through its own swing characteristics, avoiding excessive stress concentration caused by deformation limitations in rigid connections. At the same time, under normal operating conditions, the swing support rod 9 can assist the chimney outer support frame 7 in sharing part of the vertical and lateral loads, further optimizing the load transfer path, enhancing the deformation resistance of the connection area between the flue bend section 11 and the outer wall of the chimney outer cylinder 31, preventing structural fatigue damage caused by long-term load accumulation, and thus continuously ensuring the structural stability of the flue bend section.

[0046] In some embodiments, a first expansion joint 4 is provided at the connection between the flue bend section 11 and the inner cylinder 32 of the chimney, and a second expansion joint 5 is provided at the connection between the flue bend section 11 and the absorption tower 2. Both adopt a corrugated elastic structure design, which has good axial, lateral and angular compensation capabilities. The first expansion joint 4 can effectively absorb the relative displacement between the inner cylinder 32 of the chimney and the flue bend section 11 caused by temperature changes or wind loads during operation, avoiding excessive stress concentration at the rigid connection and fatigue damage. The second expansion joint 5 can adapt to the slight displacement between the absorption tower 2 and the flue bend section 11 caused by equipment vibration or thermal expansion and contraction, ensuring the sealing performance of the connection and preventing flue gas leakage.

[0047] In some embodiments, two flues 1 are provided, and the two flues 1 are symmetrically arranged about the vertical central axis of the chimney 3. The curved section 11 of each flue is sequentially connected to the inner cylinder 32 of the chimney to form a flue structure. The part of each flue curved section located outside the outer cylinder 31 of the chimney is connected to the outer wall of the outer cylinder 31 of the chimney through a hinged rocker support rod. The two sets of rocker support rods are also symmetrically distributed.

[0048] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An integrated chimney and flue structure, characterized in that, include: Chimney (3), the chimney (3) is not horizontally arranged, the chimney (3) includes an outer chimney cylinder (31) and at least one inner chimney cylinder (32), the inner chimney cylinder (32) is disposed inside the outer chimney cylinder (31) and connected to the outer chimney cylinder (31); At least one flue (1) includes a flue bend (11), one end of which is connected to an absorption tower (2) arranged outside the outer casing (31) of the chimney, and the other end of which passes through the outer casing (31) of the chimney and is connected to the inner casing (32) of the chimney. The flue bend (11) and the inner casing (32) of the chimney are connected to form a continuous non-horizontal flue structure.

2. The integrated chimney and flue structure according to claim 1, characterized in that, The curved section (11) of the flue includes a first curved section (111), an adjusting straight section (113), and a second curved section (112) connected in sequence. The first curved section (111) is located outside the outer cylinder (31) of the chimney and is horizontally limited to the flue outlet of the absorption tower (2). The second curved section (112) is located inside the outer cylinder (31) of the chimney and is connected to the inner cylinder (32) of the chimney. The first curved section (111), the adjusting straight section (113), and the second curved section (112) are all vertically supported on the outer cylinder (31) of the chimney.

3. The integrated chimney and flue structure according to claim 2, characterized in that, The first curved section (111) and the second curved section (112) are arranged symmetrically about the straight section (113), and the center of gravity of the flue curved section (11) is located at the geometric center of the straight section (113).

4. The integrated chimney and flue structure according to claim 2, characterized in that, The bending angle of the first bending segment (111) and the second bending segment (112) is 60°.

5. The integrated chimney and flue structure according to claim 2, characterized in that, The radii of curvature of the first curved segment (111) and the second curved segment (112) are twice their diameters, respectively.

6. The integrated chimney and flue structure according to claim 1, characterized in that, The inner cylinder (32) of the chimney is arranged vertically, and the curved section (11) of the flue is smoothly connected upward from the flue outlet of the absorption tower (2) to the bottom end of the inner cylinder (32).

7. The integrated chimney and flue structure according to claim 1, characterized in that, The outer casing (31) of the chimney is arranged vertically.

8. The integrated chimney and flue structure according to claim 1, characterized in that, The portion of the flue bend (11) located inside the chimney outer cylinder (31) is connected to the inner wall of the chimney outer cylinder (31) via an inner chimney support frame (6). The portion of the flue bend (11) located outside the chimney outer cylinder (31) is connected to the outer wall of the chimney outer cylinder (31) via an outer chimney support frame (7). Furthermore, a swing support rod (9) is provided between the portion of the flue bend (11) located outside the chimney outer cylinder (31) and the outer wall of the chimney outer cylinder (31).

9. The integrated chimney and flue structure according to claim 1, characterized in that, A first expansion joint (4) is provided at the connection position between the flue bend section (11) and the inner cylinder of the chimney (32), and a second expansion joint (5) is provided at the connection position between the flue bend section (11) and the absorption tower (2).

10. The integrated chimney and flue structure according to any one of claims 1-9, characterized in that, Two flues (1) are provided, and the two flues (1) are arranged symmetrically about the vertical central axis of the chimney (3).

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