Abrasion-proof device of circulating fluidized bed boiler

Abstract

The abrasion-proof device of the circulating fluidized bed boiler comprises a shell, a plurality of grating plates are arranged in the middle of the interior of the shell, and the grating plates are distributed in the circumferential direction of the shell at equal intervals; a second annular sliding groove and a third annular sliding groove are oppositely formed in the inner side of the shell up and down, a second sliding ring is rotationally arranged in the second annular sliding groove, a third sliding ring is rotationally arranged in the third annular sliding groove, and a plurality of first clamping plates are arranged on one side of the second sliding ring. The shell is installed on a boiler body with the elevation ranging from 14220 mm to 24220 mm and the elevation ranging from 31550 mm to 33340 mm, in the working process, the heat absorption and flow guide effects can be achieved through the arranged grating plates, the flow speed of adherent flow is reduced, meanwhile, the heat exchange effect of the adherent flow is reduced as little as possible, the abrasion-proof effect of a heated surface is ensured, and meanwhile, the hearth ultra-low emission is optimized in an auxiliary mode to reach the standard.

Description

Technical Field

[0001] The invention relates to the field of circulating fluidized bed boilers, in particular to an anti-wear device for circulating fluidized bed boilers. Background Art

[0002] The circulating fluidized bed boiler uses the most industrialized clean coal combustion technology. The circulating fluidized bed boiler uses fluidized combustion, and its main structure includes two parts: the combustion chamber (including the dense phase zone and the dilute phase zone) and the circulating furnace (including the high-temperature gas-solid separator and the return system). The biggest difference from the bubbling fluidized bed combustion technology is the high operating wind speed, which strengthens the heterogeneous reaction processes such as combustion and desulfurization. The boiler capacity can be expanded to a large capacity (600MW or above) that the power industry can accept. The circulating fluidized bed boiler has well solved the basic problems of thermodynamics, mechanics, materials science, and engineering problems such as expansion, wear, and overheating, and has become an advanced technology for the energy utilization of difficult-to-burn solid fuels (such as coal gangue, oil shale, urban garbage, sludge and other wastes).

[0003] When a circulating fluidized bed boiler is in use, water flowing through the water-cooled wall tubes will cause scouring and cutting wear to the water-cooled wall tubes, resulting in a short boiler operation cycle and greater wear of the water-cooled wall tubes. To this end, the present application provides an anti-wear device for a circulating fluidized bed boiler. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes an anti-wear device for a circulating fluidized bed boiler to solve the above problems in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides an anti-wear device for a circulating fluidized bed boiler, comprising: a shell, a plurality of grid plates are arranged in the inner middle of the shell, and the plurality of grid plates are evenly distributed around the circumference of the shell;

[0006] A second annular slide groove and a third annular slide groove are provided on the inner side of the shell in a relative manner from top to bottom, a second sliding ring is rotatably provided inside the second annular slide groove, a third sliding ring is rotatably provided inside the third annular slide groove, a plurality of first clamping plates are provided on one side of the second sliding ring, a plurality of second clamping plates are provided on one side of the third sliding ring, the number of the first clamping plates and the second clamping plates are consistent with the number of the grille plates, and the first clamping plates and the second clamping plates are respectively located on both sides of the grille plates;

[0007] A first annular slide groove is provided on the inner top of the housing, a first sliding ring is rotatably provided inside the first annular slide groove, and a plurality of blades are provided on one side of the first sliding ring;

[0008] The inner wall of the shell is provided with an installation cavity, a linkage ring is rotatably provided inside the installation cavity, the first sliding ring is connected to the linkage ring, a driving structure is provided inside the installation cavity, the driving structure is connected to the second sliding ring and the third sliding ring, and is used to drive the second sliding ring and the third sliding ring to rotate.

[0009] Further, the driving structure includes a first driven ring and a second driven ring rotatably arranged inside the installation cavity, the first driven ring and the second driven ring are opposite to each other up and down, a plurality of upper hinge seats are arranged at the bottom of the first driven ring, a plurality of lower hinge seats are arranged at the top of the second driven ring, a plurality of hinge shafts are rotatably arranged inside the installation cavity, a hinge rod is arranged on the hinge shaft, and two ends of the hinge rod are respectively hinged to the upper hinge seat and the lower hinge seat;

[0010] The linkage ring is meshingly connected with the first driven ring;

[0011] The upper and lower side walls of the first annular slide groove, the second annular slide groove and the third annular slide groove are all provided with embedded grooves, an embedded block is rotatably arranged in the embedded groove, the embedded block is connected to an embedded ring, the first sliding ring is connected to a connecting rod through the embedded ring, the connecting rod is connected to the linkage ring, the second sliding ring and the third sliding ring are connected to the first driven ring and the second driven ring through the embedded ring.

[0012] Furthermore, a torsion spring is arranged inside the installation cavity, and the torsion spring is connected to the first driven ring.

[0013] Furthermore, a plurality of movable blocks are rotatably provided on the outer wall of the linkage ring, a plurality of springs are provided on the outer wall of the linkage ring, one end of the spring is connected to one end of the movable block, and a plurality of shifting blocks are provided on the inner wall of the first driven ring.

[0014] Furthermore, a plurality of spoilers are provided on the inner bottom of the shell, and the spoilers are connected to the linkage ring.

[0015] Furthermore, one end of the spoiler is rotatably connected to the shell, a plurality of slide grooves are provided at the bottom of the shell, the other end of the spoiler is connected to the linkage ring through the slide grooves, and the slide grooves are communicated with the installation cavity.

[0016] Furthermore, a moving block is slidably arranged inside the slide groove, the moving block is connected to the other end of the spoiler, one end of the moving block is provided with a second wedging surface, and a plurality of push blocks are arranged at the bottom of the linkage ring, one end of the push block is provided with a first wedging surface.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Install the shell to the boiler body at an elevation of 14220mm to 24220mm and an elevation of 31550mm to 33340mm. During operation, the grille plate can absorb heat and guide flow, reduce the flow velocity of the wall flow and minimize the heat exchange effect of the wall flow. While ensuring the anti-wear effect of the heating surface, it also helps optimize the furnace to meet ultra-low emission standards.

[0019] 2. When water flows through the shell, the first sliding ring is driven to rotate by the water flow and the blades, and the linkage ring is driven to rotate by the first sliding ring, and the first driven ring is driven to rotate clockwise by the linkage ring. When the first driven ring rotates clockwise, the second driven ring is driven to rotate counterclockwise by the hinge rod, and finally the first clamping plate and the second clamping plate are driven to move closer to each other and fit with both sides of the grille plate to increase the overall thickness and achieve better anti-wear effect. When the water flow ends, the first driven ring and the second driven ring are driven to reset by the torsion spring, so that the first clamping plate and the second clamping plate move away from each other, which is convenient for the grille plate, the first clamping plate and the second clamping plate to dissipate heat.

[0020] 3. The spoiler can further disturb the water flow to prevent it from sticking to the wall and further reduce wear.

[0021] Fourth, when the linkage ring rotates, it will drive the push block to move, and the push block and the moving block will be released. Under the action of the first wedge surface and the second wedge surface, the moving block will be driven to move upward, and then the other end of the spoiler will be driven to move upward. When the push block passes over the moving block, the moving block will be driven downward under the action of the gravity of the water flow, so that the other end of the spoiler will move downward. When the push block contacts the moving block again, the other end of the spoiler will be driven upward again. Finally, when the water flows through the shell, the spoiler interacts back and forth, and its posture changes back and forth, thereby enhancing the spoiler effect, further preventing the water flow from adhering to the wall, and reducing wear and heat.

[0022] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of a second three-dimensional structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the housing in the present invention;

[0026] Figure 4 It is a schematic diagram of the local structure of the shell in the present invention;

[0027] Figure 5is a cross-sectional view of the housing in the present invention;

[0028] Figure 6 It is a schematic diagram of the internal structure of the installation cavity in the present invention;

[0029] Figure 7 The present invention is attached Figure 6 A magnified view of middle;

[0030] Figure 8 The present invention is attached Figure 6 Enlarged view of middle B;

[0031] Fig. 9 is a top view of the linkage ring in the present invention;

[0032] Fig.10 The present invention is attached Fig. 9 Enlarged view of middle C;

[0033] Fig.11 It is a partial structural schematic diagram of the first driven ring in the present invention;

[0034] Fig.12 It is a partial structural schematic diagram of the linkage ring in the present invention;

[0035] Fig.13 is a partial structural diagram of the first sliding ring in the present invention;

[0036] Fig.14 is a cross-sectional view of the first splint in the present invention;

[0037] Fig.15 It is a side view of the first clamping plate in the present invention.

[0038] In the figure: 1, housing; 2, blades; 3, grille plate; 4, spoiler; 5, slide; 6, first annular slide; 7, first sliding ring; 8, first clamping plate; 9, second clamping plate; 10, second sliding ring; 11, third sliding ring; 12, mounting cavity; 13, linkage ring; 14, first driven ring; 15, second driven ring; 16, hinge rod; 17, connecting rod; 18, embedded block; 19, second annular slide; 20, third ring shaped slide groove; 21, push block; 22, embedding groove; 23, embedding ring; 24, torsion spring; 25, shift block; 26, movable block; 27, upper hinge seat; 28, spring; 29, lower hinge seat; 30, first wedge surface; 31, hinge shaft; 32, moving block; 33, second wedge surface; 34, mounting groove; 35, first gear; 36, first gear tooth; 37, second gear; 38, sliding shell; 39, second gear tooth; 40, expansion plate. DETAILED DESCRIPTION

[0039] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific implementation methods of the present invention are now described with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0040] Reference Figure 1-15 As shown, an anti-wear device for a circulating fluidized bed boiler comprises: a shell 1, a plurality of grid plates 3 are arranged in the inner middle of the shell 1, and the plurality of grid plates 3 are evenly distributed around the circumference of the shell 1;

[0041] A second annular chute 19 and a third annular chute 20 are provided on the inner side of the housing 1 in a relative manner from top to bottom. A second sliding ring 10 is rotatably provided inside the second annular chute 19, and a third sliding ring 11 is rotatably provided inside the third annular chute 20. A plurality of first clamping plates 8 are provided on one side of the second sliding ring 10, and a plurality of second clamping plates 9 are provided on one side of the third sliding ring 11. The number of the first clamping plates 8 and the second clamping plates 9 is consistent with the number of the grille plates 3, and the first clamping plates 8 and the second clamping plates 9 are respectively located on both sides of the grille plates 3;

[0042] A first annular slide groove 6 is provided at the inner top of the housing 1, a first sliding ring 7 is rotatably provided inside the first annular slide groove 6, a plurality of blades 2 are provided on one side of the first sliding ring 7, a mounting cavity 12 is provided on the inner wall of the housing 1, a linkage ring 13 is rotatably provided inside the mounting cavity 12, the first sliding ring 7 is connected to the linkage ring 13, a driving structure is provided inside the mounting cavity 12, the driving structure is connected to the second sliding ring 10 and the third sliding ring 11, and is used to drive the second sliding ring 10 and the third sliding ring 11 to rotate;

[0043] The driving structure includes a first driven ring 14 and a second driven ring 15 rotatably arranged inside the installation cavity 12. The first driven ring 14 and the second driven ring 15 are opposite to each other up and down. A plurality of upper hinge seats 27 are arranged at the bottom of the first driven ring 14, and a plurality of lower hinge seats 29 are arranged at the top of the second driven ring 15. A plurality of hinge shafts 31 are rotatably arranged inside the installation cavity 12, and a hinge rod 16 is arranged on the hinge shaft 31. The two ends of the hinge rod 16 are respectively hinged to the upper hinge seat 27 and the lower hinge seat 29, and the linkage ring 13 is meshed and connected with the first driven ring 14.

[0044] The upper and lower side walls of the first annular slide groove 6, the second annular slide groove 19 and the third annular slide groove 20 are all provided with an embedding groove 22, an embedding block 18 is rotatably arranged in the embedding groove 22, the embedding block 18 is connected to the embedding ring 23, the first sliding ring 7 is connected to the connecting rod 17 through the embedding ring 23, the connecting rod 17 is connected to the linkage ring 13, the second sliding ring 10 and the third sliding ring 11 are connected to the first driven ring 14 and the second driven ring 15 through the embedding ring 23, and a torsion spring 24 is arranged inside the installation cavity 12, and the torsion spring 24 is connected to the first driven ring 14.

[0045] A technical solution provided by the present invention is that when in use, the shell 1 is installed to the boiler body at an elevation of 14220mm to 24220mm and an elevation of 31550mm to 33340mm. During operation, the set grille plate 3 can absorb heat and guide flow, reduce the flow velocity of the wall flow while minimizing the heat exchange effect of the wall flow, and assist in optimizing the ultra-low emission of the furnace to meet the standards while ensuring the anti-wear effect of the heating surface. When water flows through the shell 1, the first sliding ring 7 will be driven to rotate by the water flow and the blades 2, and the linkage ring 13 will be driven to rotate by the first sliding ring 7, and the first driven ring 14 will be driven to rotate clockwise by the linkage ring 13. When the first driven ring 14 rotates clockwise, the second driven ring 15 will be driven to rotate counterclockwise by the hinge rod 16, and finally the first clamping plate 8 and the second clamping plate 9 will be driven to move closer to each other and fit with the two sides of the grille plate 3, so as to increase the overall thickness and achieve better anti-wear effect. When the water flow ends, the first driven ring 14 and the second driven ring 15 will be driven to reset by the torsion spring 24, so that the first clamping plate 8 and the second clamping plate 9 will move away from each other, so as to facilitate the heat dissipation of the grille plate 3, the first clamping plate 8 and the second clamping plate 9.

[0046] Preferably, the outer wall of the linkage ring 13 is rotatably provided with a plurality of movable blocks 26 , the outer wall of the linkage ring 13 is provided with a plurality of springs 28 , one end of the spring 28 is connected to one end of the movable block 26 , and the inner wall of the first driven ring 14 is provided with a plurality of shifting blocks 25 .

[0047] Specifically, when the linkage ring 13 rotates, the movable block 26 and the shift block 25 are provided to drive the first driven ring 14 to rotate. After the first clamping plate 8 and the second clamping plate 9 are fitted with the grid plate 3, the first driven ring 14 and the second driven ring 15 cannot continue to rotate, while the linkage ring 13 continues to rotate. When the pressure increases, the movable block 26 is eventually folded and moved to pass over the shift block 25, thereby keeping the first driven ring 14 and the second driven ring 15 stationary without affecting the rotation of the linkage ring 13.

[0048] Preferably: a plurality of spoilers 4 are provided at the inner bottom of the shell 1, the spoiler 4 is connected to the linkage ring 13, one end of the spoiler 4 is rotatably connected to the shell 1, a plurality of slide grooves 5 are provided at the bottom of the shell 1, the other end of the spoiler 4 is connected to the linkage ring 13 through the slide groove 5, the slide groove 5 is communicated with the installation cavity 12, a moving block 32 is slidably provided inside the slide groove 5, the moving block 32 is connected to the other end of the spoiler 4, one end of the moving block 32 is provided with a second wedge surface 33, a plurality of push blocks 21 are provided at the bottom of the linkage ring 13, and one end of the push block 21 is provided with a first wedge surface 30.

[0049] Specifically, the spoiler 4 can further disturb the water flow, prevent it from sticking to the wall, and further reduce wear. When the linkage ring 13 rotates, it will drive the push block 21 to move, and the push block 21 and the moving block 32 are released. Under the action of the first wedging surface 30 and the second wedging surface 33, the moving block 32 is driven to move upward, and then the other end of the spoiler 4 is driven to move upward. After the push block 21 passes over the moving block 32, under the action of the gravity of the water flow, the moving block 32 is driven to move downward, so that the other end of the spoiler 4 moves downward. When the push block 21 contacts the moving block 32 again, the other end of the spoiler 4 is driven to move upward again. Finally, when the water flows through the shell 1, the spoiler 4 interacts back and forth, and the posture changes back and forth, which enhances the effect of the spoiler, further prevents the water flow from sticking to the wall, and reduces wear and heat.

[0050] Preferably: a mounting groove 34 is provided at the top of the second sliding ring 10 and the bottom of the third sliding ring 11, a first gear 35 is rotatably provided inside the mounting groove 34, and the first gear 35 is connected to the first clamping plate 8 and the second clamping plate 9;

[0051] The top of the second annular chute 19 and the bottom of the third annular chute 20 are both provided with a plurality of sets of first gear teeth 36;

[0052] A second gear 37 is rotatably arranged inside the first clamping plate 8, a sliding shell 38 is slidably arranged inside the first clamping plate 8, one end of the sliding shell 38 is connected to an expansion plate 40, one end of the second gear 37 is fixedly connected to the first gear 35, and a plurality of second gear teeth 39 are arranged on the inner top of the sliding shell 38.

[0053] Specifically, when the second rotating ring 10 and the third rotating ring 11 rotate, the first gear 35 is driven to rotate under the action of the first gear 36, and the first clamping plate 8 and the second clamping plate 9 are driven to rotate through the first gear 35, so that the first clamping plate 8 and the second clamping plate 9 are in a vertical state. When the second rotating ring 10 is reset and rotated, the second clamping plate 9 and the first clamping plate 8 are driven to reset, and at the same time, the first clamping plate 8 and the second clamping plate 9 are tilted to facilitate heat dissipation. When the first clamping plate 8 and the second clamping plate 9 are attached to the grid plate 3, the second gear 37 is driven to rotate through the first gear 35, and the sliding shell 38 is driven to move through the second gear 37, and the expansion plate 40 is driven to move through the sliding shell 38, thereby increasing the number of grids and improving the anti-wear effect.

[0054] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An anti-wear device for a circulating fluidized bed boiler, comprising: A shell (1), characterized in that: a plurality of grid plates (3) are arranged in the inner middle portion of the shell (1), and the plurality of grid plates (3) are evenly distributed around the circumference of the shell (1); A second annular slide groove (19) and a third annular slide groove (20) are provided on the inner side of the shell (1) in a relative manner from top to bottom; a second sliding ring (10) is rotatably provided inside the second annular slide groove (19); a third sliding ring (11) is rotatably provided inside the third annular slide groove (20); a plurality of first clamping plates (8) are provided on one side of the second sliding ring (10); a plurality of second clamping plates (9) are provided on one side of the third sliding ring (11); the number of the first clamping plates (8) and the second clamping plates (9) are consistent with the number of the grille plates (3); the first clamping plates (8) and the second clamping plates (9) are respectively located on both sides of the grille plates (3); A first annular sliding groove (6) is provided at the inner top of the housing (1), a first sliding ring (7) is rotatably provided inside the first annular sliding groove (6), and a plurality of blades (2) are provided on one side of the first sliding ring (7); The inner wall of the housing (1) is provided with an installation cavity (12), a linkage ring (13) is rotatably provided inside the installation cavity (12), the first sliding ring (7) is connected to the linkage ring (13), a driving structure is provided inside the installation cavity (12), the driving structure is connected to the second sliding ring (10) and the third sliding ring (11), and is used to drive the second sliding ring (10) and the third sliding ring (11) to rotate.

2. The anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: The driving structure comprises a first driven ring (14) and a second driven ring (15) which are rotatably arranged inside the installation cavity (12); the first driven ring (14) and the second driven ring (15) are opposed to each other up and down; a plurality of upper hinge seats (27) are arranged at the bottom of the first driven ring (14); a plurality of lower hinge seats (29) are arranged at the top of the second driven ring (15); a plurality of hinge shafts (31) are rotatably arranged inside the installation cavity (12); a hinge rod (16) is arranged on the hinge shaft (31); and two ends of the hinge rod (16) are respectively hinged to the upper hinge seat (27) and the lower hinge seat (29); The linkage ring (13) is meshingly connected with the first driven ring (14); The upper and lower side walls of the first annular slide groove (6), the second annular slide groove (19) and the third annular slide groove (20) are each provided with an embedding groove (22), an embedding block (18) is rotatably arranged in the embedding groove (22), the embedding block (18) is connected to an embedding ring (23), the first sliding ring (7) is connected to a connecting rod (17) via the embedding ring (23), the connecting rod (17) is connected to the linkage ring (13), the second sliding ring (10) and the third sliding ring (11) are both connected to the first driven ring (14) and the second driven ring (15) via the embedding ring (23).

3. The anti-wear device for a circulating fluidized bed boiler according to claim 2, characterized in that: A torsion spring (24) is arranged inside the installation cavity (12), and the torsion spring (24) is connected to the first driven ring (14).

4. The anti-wear device for a circulating fluidized bed boiler according to claim 2, characterized in that: The outer wall of the linkage ring (13) is rotatably provided with a plurality of movable blocks (26), the outer wall of the linkage ring (13) is provided with a plurality of springs (28), one end of the spring (28) is connected to one end of the movable block (26), and the inner wall of the first driven ring (14) is provided with a plurality of shifting blocks (25).

5. The anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: A plurality of spoilers (4) are provided on the inner bottom of the housing (1), and the spoilers (4) are connected to the linkage ring (13).

6. The anti-wear device for a circulating fluidized bed boiler according to claim 5, characterized in that: One end of the spoiler (4) is rotatably connected to the shell (1), a plurality of slide grooves (5) are provided at the bottom of the shell (1), the other end of the spoiler (4) is connected to the linkage ring (13) via the slide groove (5), and the slide groove (5) is in communication with the installation cavity (12).

7. The anti-wear device for a circulating fluidized bed boiler according to claim 6, characterized in that: A moving block (32) is slidably arranged inside the slide groove (5), the moving block (32) is connected to the other end of the spoiler (4), one end of the moving block (32) is provided with a second wedging surface (33), and a plurality of push blocks (21) are arranged at the bottom of the linkage ring (13), one end of the push block (21) is provided with a first wedging surface (30).

8. The anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: The top of the second sliding ring (10) and the bottom of the third sliding ring (11) are both provided with a mounting groove (34), a first gear (35) is rotatably arranged inside the mounting groove (34), and the first gear (35) is connected to the first clamping plate (8) and the second clamping plate (9); A plurality of groups of first gear teeth (36) are provided at the top of the second annular slide groove (19) and the bottom of the third annular slide groove (20).

9. The anti-wear device for a circulating fluidized bed boiler according to claim 8, characterized in that: A second gear (37) is rotatably arranged inside the first clamping plate (8), a sliding shell (38) is slidably arranged inside the first clamping plate (8), one end of the sliding shell (38) is connected to an expansion plate (40), one end of the second gear (37) is fixedly connected to the first gear (35), and a plurality of second gear teeth (39) are arranged on the inner top of the sliding shell (38).

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