An erosion protection device for a circulating fluidized bed boiler

Abstract

The application provides a kind of circulating fluidized bed boiler's anti-abrasion device, which comprises a shell, a plurality of grid plates are arranged in the inner middle part of the shell, and the plurality of grid plates are distributed equidistantly around the circumference of the shell;Second annular chute and third annular chute are opened on the inner side of the shell, a second sliding ring is rotatably arranged in the interior of the second annular chute, a third sliding ring is rotatably arranged in the interior of the third annular chute, and a plurality of first clamping plates are arranged on one side of the second sliding ring.The shell is installed to the boiler body above the elevation of 14220mm to 24220mm, between the elevation of 31550mm to 33340mm, in the work, the grid plate can play the role of heat absorption and flow guiding, reduce the wall flow speed while as far as possible to reduce the wall flow heat exchange effect, while ensuring the anti-abrasion effect of the heating surface, auxiliary optimization of furnace ultra-low emission compliance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circulating fluidized bed boiler, in particular to a kind of anti-abrasion device of circulating fluidized bed boiler. BACKGROUND

[0002] Circulating fluidized bed boiler adopts the most industrialized clean coal combustion technology.Circulating fluidized bed boiler adopts fluidized combustion, and the main structure includes combustion chamber (including dense phase zone and dilute phase zone) and circulating back furnace (including high-temperature gas-solid separator and return system) two parts, and the biggest difference from bubble fluidized bed combustion technology is that the operation wind speed is high, which strengthens the combustion and desulfurization and other heterogeneous reaction processes, and the boiler capacity can be enlarged to the large capacity (600MW or above grade) accepted by electric power industry, and circulating fluidized bed boiler has well solved the basic problems of thermology, mechanics, material science and engineering problems such as expansion, abrasion and overtemperature, and become an advanced technology for energy utilization of difficult solid fuel (such as coal gangue, oil shale, municipal solid waste, sludge and other wastes).

[0003] In the use of circulating fluidized bed boiler, gas-solid two-phase flow passes through water-cooled wall pipe, which can cause erosion and cutting abrasion to water-cooled wall pipe, resulting in short operation cycle of boiler and large abrasion of water-cooled wall pipe.Therefore, the present application provides an anti-abrasion device for circulating fluidized bed boiler. SUMMARY

[0004] To solve the above problems, the present application provides an anti-abrasion device for circulating fluidized bed boiler to solve the problems existing in the prior art.

[0005] To achieve the above purpose, the anti-abrasion device for circulating fluidized bed boiler provided by the present application comprises: a shell, a plurality of grid plates are arranged in the inner middle part of the shell, and the plurality of grid plates are distributed at equal intervals around the circumference of the shell;

[0006] A second annular sliding groove and a third annular sliding groove are oppositely arranged on the inner side of the shell, a second sliding ring is rotatably arranged in the second annular sliding groove, a third sliding ring is rotatably arranged in the third annular sliding groove, a plurality of first clamping plates are arranged on one side of the second sliding ring, a plurality of second clamping plates are arranged on one side of the third sliding ring, the number of the first clamping plates and the second clamping plates is consistent with the number of the grid plates, and the first clamping plates and the second clamping plates are respectively located on both sides of the grid plates;

[0007] A first annular sliding groove is arranged on the inner top of the shell, a first sliding ring is rotatably arranged in the first annular sliding groove, and a plurality of blades are arranged on one side of the first sliding ring;

[0008] The inner wall of the shell is provided with a mounting cavity, a linkage ring is rotationally arranged in the mounting cavity, the first sliding ring is connected with the linkage ring, a driving structure is arranged in the mounting cavity, and the driving structure is connected with the second sliding ring and the third sliding ring, so as to drive the second sliding ring and the third sliding ring to rotate.

[0009] Further, the driving structure comprises a first driven ring and a second driven ring which are rotationally arranged in the mounting cavity, the first driven ring and the second driven ring are oppositely arranged, the bottom of the first driven ring is provided with a plurality of upper hinge seats, the top of the second driven ring is provided with a plurality of lower hinge seats, a plurality of hinge shafts are rotationally arranged in the mounting cavity, a hinge rod is arranged on the hinge shaft, and the two ends of the hinge rod are respectively hinged with the upper hinge seat and the lower hinge seat.

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

[0011] The upper and lower sidewalls of the first, second and third annular sliding grooves are all provided with embedded grooves, embedded blocks are rotationally arranged in the embedded grooves, the embedded blocks are connected with embedded rings, the first sliding ring is connected with a connecting rod through the embedded ring, the connecting rod is connected with the linkage ring, and the second sliding ring and the third sliding ring are both connected with the first driven ring and the second driven ring through the embedded ring.

[0012] Further, a torsional spring is arranged in the mounting cavity, and the torsional spring is connected with the first driven ring.

[0013] Further, a plurality of movable blocks are rotationally arranged on the outer wall of the linkage ring, a plurality of springs are arranged on the outer wall of the linkage ring, one end of the spring is connected with one end of the movable block, and the inner wall of the first driven ring is provided with a plurality of push blocks.

[0014] Further, a plurality of spoiler plates are arranged on the inner bottom of the shell, and the spoiler plates are connected with the linkage ring.

[0015] Further, one end of the spoiler plate is rotationally connected with the shell, a plurality of sliding grooves are arranged on the bottom of the shell, the other end of the spoiler plate is connected with the linkage ring through the sliding grooves, and the sliding grooves are communicated with the mounting cavity.

[0016] Further, a moving block is slidably arranged in the sliding groove, the moving block is connected with the other end of the spoiler plate, one end of the moving block is provided with a second wedge surface, the bottom of the linkage ring is provided with a plurality of push blocks, and one end of the push block is provided with a first wedge surface.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] I. The shell is installed to the boiler body above the elevation of 14220mm to 24220mm, above the elevation of 31550mm to 33340mm, in the work, through the set grid plate can play the role of heat absorption and flow guide, reduce the wall flow speed while as little as possible reduce the wall flow heat transfer effect, while ensuring the heat absorption surface anti-wear effect, auxiliary optimization of furnace ultra-low emission standard.

[0019] II. When the gas-solid two-phase flow passes through the shell, the first sliding ring is driven to rotate by the gas-solid two-phase flow and the blade, the linkage ring is driven to rotate by the first sliding ring, 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 set hinge rod, finally the first clamping plate and the second clamping plate move close to each other and fit on both sides of the grid plate, increase the overall thickness, play a better anti-wear effect, when the gas-solid two-phase flow ends, the first driven ring and the second driven ring are reset by the torsional spring, the first clamping plate and the second clamping plate move away from each other, facilitate the heat dissipation of the grid plate, the first clamping plate and the second clamping plate.

[0020] III. The set spoiler can further disturb the gas-solid two-phase flow to prevent wall sticking and further reduce wear.

[0021] IV. When the linkage ring rotates, the push block moves, the push block and the moving block are removed, under the action of the first wedge surface and the second wedge surface, the moving block moves upward, and then the other end of the spoiler moves upward, when the push block passes the moving block, under the action of the gravity of the gas-solid two-phase flow, the moving block moves downward, the other end of the spoiler moves downward, when the push block contacts the moving block again, the other end of the spoiler moves upward again, finally when the gas-solid two-phase flow passes through the shell, the spoiler moves back and forth, the posture changes back and forth, the disturbance effect is enhanced, the gas-solid two-phase flow is further prevented from sticking to the wall, and the wear and heat are reduced.

[0022] In order to better understand and implement, the present application is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the first kind of three-dimensional structure schematic diagram of the present application;

[0024] Figure 2 is the second kind of three-dimensional structure schematic diagram of the present application;

[0025] Figure 3 is the internal structure schematic diagram of the shell in the present application;

[0026] Figure 4 is the partial structure schematic diagram of the shell in the present application;

[0027] Figure 5 is a sectional view of the housing in the present application;

[0028] Figure 6 is a schematic view of the internal structure of the mounting cavity in the present application;

[0029] Figure 7 is an enlarged view of the attachment A in the present application; Figure 6

[0030] Figure 8 is an enlarged view of the attachment B in the present application; Figure 6

[0031] Figure 9 is a plan view of the linkage ring in the present application;

[0032] Figure 10 is an enlarged view of the attachment C in the present application; Figure 9

[0033] Figure 11 is a schematic view of the partial structure of the first driven ring in the present application;

[0034] Figure 12 is a schematic view of the partial structure of the linkage ring in the present application;

[0035] Figure 13 is a schematic view of the partial structure of the first sliding ring in the present application;

[0036] Figure 14 is a sectional view of the first clamping plate in the present application;

[0037] Figure 15 is a side view of the first clamping plate in the present application.

[0038] In the figure: 1, housing; 2, blade; 3, grating plate; 4, spoiler; 5, sliding groove; 6, first annular sliding groove; 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 sliding groove; 20, third annular sliding groove; 21, push block; 22, embedded groove; 23, embedded ring; 24, torsional spring; 25, push 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, objectives and effects of the present application, the specific embodiments of the present application will be described with reference to the drawings, but the protection scope of the present application is not limited to the following description.

[0040] Referring to Figures 1-15 As shown in the figure, an anti-abrasion device of a circulating fluidized bed boiler comprises a shell 1, a plurality of grid plates 3 are arranged in the middle part of the shell 1, and the plurality of grid plates 3 are distributed at equal intervals around the circumference of the shell 1;

[0041] A second annular sliding groove 19 and a third annular sliding groove 20 are oppositely arranged on the inner side of the shell 1, a second sliding ring 10 is rotatably arranged in the second annular sliding groove 19, a third sliding ring 11 is rotatably arranged in the third annular sliding groove 20, a plurality of first clamping plates 8 are arranged on one side of the second sliding ring 10, a plurality of second clamping plates 9 are arranged 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 grid plates 3, and the first clamping plates 8 and the second clamping plates 9 are respectively arranged on both sides of the grid plates 3;

[0042] A first annular sliding groove 6 is arranged on the inner top of the shell 1, a first sliding ring 7 is rotatably arranged in the first annular sliding groove 6, a plurality of blades 2 are arranged on one side of the first sliding ring 7, an installation cavity 12 is arranged on the inner wall of the shell 1, a linkage ring 13 is rotatably arranged in the installation cavity 12, the first sliding ring 7 is connected with the linkage ring 13, a driving structure is arranged in the installation cavity 12, the driving structure is connected with the second sliding ring 10 and the third sliding ring 11, and the driving structure is used to drive the second sliding ring 10 and the third sliding ring 11 to rotate;

[0043] The driving structure comprises a first driven ring 14 and a second driven ring 15 which are rotatably arranged in the installation cavity 12, the first driven ring 14 and the second driven ring 15 are oppositely arranged, a plurality of upper hinge seats 27 are arranged on the bottom of the first driven ring 14, a plurality of lower hinge seats 29 are arranged on the top of the second driven ring 15, a plurality of hinge shafts 31 are rotatably arranged in the installation cavity 12, a hinge rod 16 is arranged on the hinge shaft 31, the two ends of the hinge rod 16 are respectively hingedly connected with the upper hinge seat 27 and the lower hinge seat 29, and the linkage ring 13 is connected with the first driven ring 14;

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

[0045] The technical scheme provided by the application is characterized in that when in use, the shell 1 is installed on the boiler body at an elevation of 14220 mm to 24220 mm and an elevation of 31550 mm to 33340 mm; in operation, the grid plate 3 can play a heat absorption and flow guiding role, reduce the flow speed of the wall attachment flow, and as far as possible reduce the heat exchange effect of the wall attachment flow, while ensuring the anti-abrasion effect of the heating surface and assisting in optimizing the ultra-low emission of the furnace to meet the standard; when the gas-solid two-phase flow passes through the shell 1, the gas-solid two-phase flow and the blade 2 drive the first sliding ring 7 to rotate, the first sliding ring 7 drives the linkage ring 13 to rotate, the linkage ring 13 drives the first driven ring 14 to rotate clockwise, when the first driven ring 14 rotates clockwise, the hinge rod 16 drives the second driven ring 15 to rotate counterclockwise, and finally the first clamping plate 8 and the second clamping plate 9 move close to each other and are attached to the two sides of the grid plate 3, thereby increasing the overall thickness and playing a better anti-abrasion effect; when the gas-solid two-phase flow ends, the torsional spring 24 drives the first driven ring 14 and the second driven ring 15 to reset, so that the first clamping plate 8 and the second clamping plate 9 move away from each other, thereby facilitating the heat dissipation of the grid plate 3, the first clamping plate 8 and the second clamping plate 9.

[0046] Preferably, the outer wall of the linkage ring 13 is rotationally 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 with one end of the movable block 26, and the inner wall of the first driven ring 14 is provided with a plurality of push blocks 25.

[0047] Specifically, when the linkage ring 13 rotates, the movable block 26 and the push block 25 drive the first driven ring 14 to rotate, after the first clamping plate 8 and the second clamping plate 9 are attached to 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, and when the pressure increases, the movable block 26 is finally folded and moves over the push block 25, thereby keeping the first driven ring 14 and the second driven ring 15 stationary while not affecting the rotation of the linkage ring 13.

[0048] Preferably, the inner bottom of the shell 1 is provided with a plurality of spoiler plates 4, the spoiler plates 4 are connected with the linkage ring 13, one end of the spoiler plate 4 is rotationally connected with the shell 1, a plurality of sliding grooves 5 are formed in the bottom of the shell 1, the other end of the spoiler plate 4 is connected with the linkage ring 13 through the sliding groove 5, the sliding groove 5 communicates with the mounting cavity 12, a moving block 32 is slidably arranged in the sliding groove 5, the moving block 32 is connected with the other end of the spoiler plate 4, one end of the moving block 32 is provided with a second wedge surface 33, the bottom of the linkage ring 13 is provided with a plurality of push blocks 21, 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 gas-solid two-phase flow, prevent wall sticking, and further reduce wear. When the linkage ring 13 rotates, the push block 21 is moved, the push block 21 is removed from the moving block 32, under the action of the first wedge surface 30 and the second wedge surface 33, the moving block 32 is moved upward, and then the other end of the spoiler 4 is moved upward. When the push block 21 passes the moving block 32, the moving block 32 is moved downward under the action of the gravity of the gas-solid two-phase flow, so that the other end of the spoiler 4 is moved downward. When the push block 21 contacts the moving block 32 again, the other end of the spoiler 4 is moved upward again, so that the spoiler 4 moves back and forth when the gas-solid two-phase flow passes through the shell 1, the posture of the spoiler 4 changes back and forth, the effect of the spoiler is enhanced, and the gas-solid two-phase flow is prevented from sticking to the wall, and the wear and heat are reduced.

[0050] Preferably, the top of the second sliding ring 10 and the bottom of the third sliding ring 11 are provided with mounting grooves 34, and the first gear 35 is rotatably arranged in the mounting grooves 34.

[0051] The top of the second annular sliding groove 19 and the bottom of the third annular sliding groove 20 are provided with a plurality of first gear teeth 36.

[0052] The second gear 37 is rotatably arranged in the first clamping plate 8, the sliding shell 38 is slidably arranged in the first clamping plate 8, one end of the sliding shell 38 is connected with the expansion plate 40, one end of the second gear 37 is fixedly connected with the first gear 35, and the inner top of the sliding shell 38 is provided with a plurality of second gear teeth 39.

[0053] Specifically, when the second sliding ring 10 and the third sliding ring 11 rotate, the first gear 35 is driven to rotate under the action of the first gear teeth 36, the first clamping plate 8 and the second clamping plate 9 are driven to rotate through the first gear 35, and the first clamping plate 8 and the second clamping plate 9 are in a vertical state. When the second sliding ring 10 is reset and rotates, the second clamping plate 9 and the first clamping plate 8 are reset, and the first clamping plate 8 and the second clamping plate 9 are in an inclined state at the same time, so that heat dissipation is facilitated. When the second sliding ring 10 and the third sliding ring 11 rotate, the second gear 37 is driven to rotate through the first gear 35, the sliding shell 38 is driven to move through the second gear 37, the expansion plate 40 is driven to move through the sliding shell 38, and the number of gratings can be increased, and the anti-wear effect can be improved.

[0054] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the rights of the present application, so the equivalent changes made by the claims of the present application still belong to the scope covered by the present application.

Claims

1. An erosion shield for a circulating fluidized bed boiler, comprising: The shell (1) is characterized in that: a plurality of grid plates (3) are arranged on the inner middle part of the shell (1), and the plurality of grid plates (3) are distributed at equal intervals around the circumference of the shell (1); A second annular sliding groove (19) and a third annular sliding groove (20) are oppositely arranged on the inner side of the shell (1), a second sliding ring (10) is rotatably arranged in the second annular sliding groove (19), a third sliding ring (11) is rotatably arranged in the third annular sliding groove (20), a plurality of first clamping plates (8) are arranged on one side of the second sliding ring (10), a plurality of second clamping plates (9) are arranged 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 grid plates (3), and the first clamping plates (8) and the second clamping plates (9) are respectively located on both sides of the grid plates (3); A first annular sliding groove (6) is arranged on the inner top of the shell (1), a first sliding ring (7) is rotatably arranged in the first annular sliding groove (6), and a plurality of blades (2) are arranged on one side of the first sliding ring (7); An installation cavity (12) is arranged on the inner wall of the shell (1), a linkage ring (13) is rotatably arranged in the installation cavity (12), the first sliding ring (7) is connected with the linkage ring (13), and a driving structure is arranged in the installation cavity (12) and connected with the second sliding ring (10) and the third sliding ring (11) to drive the second sliding ring (10) and the third sliding ring (11) to rotate.

2. A wear protection 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 in the installation cavity (12), the first driven ring (14) and the second driven ring (15) are oppositely arranged, a plurality of upper hinge seats (27) are arranged on the bottom of the first driven ring (14), a plurality of lower hinge seats (29) are arranged on the top of the second driven ring (15), a plurality of hinge shafts (31) are rotatably arranged in the installation cavity (12), a hinge rod (16) is arranged on the hinge shaft (31), and the two ends of the hinge rod (16) are hingedly connected with the upper hinge seat (27) and the lower hinge seat (29) respectively; The linkage ring (13) is connected with the first driven ring (14); Upper and lower side walls of the first annular sliding groove (6), the second annular sliding groove (19) and the third annular sliding groove (20) are all provided with embedded grooves (22), embedded blocks (18) are rotatably arranged in the embedded grooves (22), the embedded blocks (18) are connected with embedded rings (23), the first sliding ring (7) is connected with a connecting rod (17) through the embedded rings (23), the connecting rod (17) is connected with the linkage ring (13), and the second sliding ring (10) and the third sliding ring (11) are connected with the first driven ring (14) and the second driven ring (15) through the embedded rings (23).

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

4. A wear protection 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 with one end of the movable block (26), and the inner wall of the first driven ring (14) is provided with a plurality of push blocks (25).

5. A wear protection device for a circulating fluidized bed boiler according to claim 1, characterized in that The inner bottom of the shell (1) is provided with a plurality of spoiler plates (4), and the spoiler plates (4) are connected with the linkage ring (13).

6. A wear protection device for a circulating fluidized bed boiler according to claim 5, characterized in that One end of the spoiler plate (4) is rotatably connected with the shell (1), the bottom of the shell (1) is provided with a plurality of sliding grooves (5), the other end of the spoiler plate (4) is connected with the linkage ring (13) through the sliding groove (5), and the sliding groove (5) is communicated with the installation cavity (12).

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

8. A wear protection 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 provided with installation grooves (34), the inside of the installation groove (34) is rotatably provided with a first gear (35), and the first gear (35) is connected with the first clamping plate (8) and the second clamping plate (9). The top of the second annular sliding groove (19) and the bottom of the third annular sliding groove (20) are provided with a plurality of first gear teeth (36).

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

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