Sealing device for central cylinder of fluidized bed boiler separator

Abstract

The utility model discloses a fluidized bed boiler separator center cylinder sealing device, and particularly relates to the technical field of fluidized bed boiler separators, the fluidized bed boiler separator center cylinder sealing device comprises a device body and a cylinder body, the cylinder body is arranged at the top of the device body, the outer wall of the cylinder body is sleeved with a first sealing assembly, and the first sealing assembly comprises a first annular plate; the first annular plate is fixedly arranged on the outer wall of the barrel in a sleeving mode, the top and the outer side wall of the first annular plate make contact with the inner wall of the device body, a plurality of L-shaped plates are arranged on the outer wall of the first annular plate, a first sealing piece is arranged at the bottom end of each L-shaped plate, and a second sealing piece is arranged at the top end of each L-shaped plate. Resistance is generated to smoke through the gaps among the first sealing piece, the second sealing piece and the device body, so that the impact force of the smoke to the first annular plate can be reduced, air leakage at the gaps among the first annular plate, the cylinder body and the device body can be further reduced, the second bolts and the first bolts are loosened, and the sealing effect is improved. And a worker can conveniently detach the L-shaped plate, the first sealing piece and the second sealing piece for cleaning and replacement.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed boiler separators, in particular to a fluidized bed boiler separator central tube sealing device. Background Art

[0002] The separator is a gas-solid two-phase separation device for circulating fluidized bed boilers. Its separation performance directly affects the overall design and operation performance of the entire circulating fluidized bed boiler. The separator is generally composed of an air inlet pipe, a cylinder, a center cylinder, a lower conical tube and other components. Since the center cylinder works under high temperature conditions, stress deformation and downward movement will occur during thermal expansion and cold contraction, resulting in a certain gap between the center cylinder and the separator outlet. In order to avoid gas short circuit in the separator, the gap between the center cylinder and the separator outlet is filled and sealed with refractory materials.

[0003] For example, the prior art publication number is CN212805620U, a sealing device for the central tube of a circulating fluidized bed boiler, in which the aluminum silicate layer of the utility model is designed in an "L" shape, the vertical part of the aluminum silicate layer is in contact with the central tube, and the horizontal part of the aluminum silicate layer is laid on a fixed plate to achieve reserved expansion in two directions, and a refractory material layer is arranged on the aluminum silicate layer, the two form a double-layer movable sealing structure, while providing refractory sealing, leaving room for expansion to avoid cracks in the refractory material layer.

[0004] However, the above-mentioned prior art still has the following problems when in use: due to the complex gas-solid two-phase flow in the circulating fluidized bed boiler, the smoke and air flow entering the separator produces a strong scouring effect on the refractory sealing casting layer, causing the refractory material to fall off, resulting in air leakage between the center tube and the separator. Based on this, the utility model provides a fluidized bed boiler separator center tube sealing device with good sealing effect. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a sealing device for the central cylinder of a fluidized bed boiler separator, which generates resistance to the flue gas through the gap between the first sealing plate, the second sealing plate and the device body, thereby reducing the impact force of the flue gas on the first ring plate, thereby reducing air leakage at the gap between the first ring plate, the cylinder and the device body, and facilitates disassembly of the L-shaped plate, the first sealing plate and the second sealing plate for cleaning and replacement, so as to solve the problems arising from the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing device for the central cylinder of a fluidized bed boiler separator, comprising a body and a cylinder, the cylinder being arranged at the top of the body, the outer wall of the cylinder being sleeved with a first sealing assembly, the first sealing assembly comprising a first ring plate, the first ring plate being fixedly sleeved on the outer wall of the cylinder, and the top and outer side wall of the first ring plate being in contact with the inner wall of the body, the outer wall of the first ring plate being provided with a plurality of L-shaped plates, the bottom end of each L-shaped plate being provided with a first sealing sheet, the top end of each L-shaped plate being provided with a second sealing sheet, the second sealing sheet, the L-shaped plate and the first sealing sheet being fixed by a first bolt and a nut, the outer wall of the cylinder being sleeved with a second sealing assembly, the second sealing assembly being arranged above the body to improve the sealing between the cylinder and the body.

[0007] In a preferred embodiment, the plurality of L-shaped plates are fixed to the first ring plate by second bolts, so as to facilitate the removal of the L-shaped plates.

[0008] In a preferred embodiment, a gap is formed between each L-shaped plate, each first sealing sheet and each second sealing sheet and the inner wall of the body, and the flow velocity of the smoke can be reduced when flowing in the gap, thereby reducing the impact of the smoke on the first ring plate.

[0009] In a preferred embodiment, the second sealing assembly includes a second ring plate, which is fixedly mounted on the outer wall of the cylinder, a sealing ring is provided at the bottom of the second ring plate, a sealing groove matching the sealing ring is provided at the top of the device body, and the sealing ring is inserted into the sealing groove. By plugging the sealing ring into the sealing groove, the sealing between the cylinder body and the device body can be greatly improved, thereby further reducing air leakage.

[0010] In a preferred embodiment, the sealing ring is made of refractory silicone. Specifically, refractory silicone is a high-temperature refractory material with excellent properties such as high temperature resistance, corrosion resistance, and wear resistance, thereby improving the fire resistance of the sealing ring.

[0011] In a preferred embodiment, an annular groove is formed at the bottom of the second ring plate, a third ring plate is slidably arranged in the annular groove, and the bottom of the third ring plate is bonded to the top of the sealing ring, so that the sealing ring can be easily torn off the third ring plate and replaced.

[0012] In a preferred embodiment, a fourth ring plate is fixedly provided on the top of the third ring plate, the top of the fourth ring plate passes through the top of the second ring plate, a plurality of long plates are fixedly provided on the outer wall of the fourth ring plate, an electric push rod is fixedly provided at the bottom of each long plate, and the electric push rod is fixedly embedded in the top of the second ring plate to facilitate adjustment of the height of the fourth ring plate.

[0013] Technical effects and advantages of the utility model:

[0014] The utility model generates resistance to smoke through the gap between the first sealing sheet, the second sealing sheet and the device body, thereby reducing the impact force of the smoke on the first ring plate, thereby reducing air leakage at the gap between the first ring plate, the cylinder and the device body, and loosening multiple second bolts and multiple first bolts to facilitate staff to disassemble the L-shaped plate, the first sealing sheet and the second sealing sheet for cleaning and replacement.

[0015] By plugging the sealing ring into the sealing groove, the sealing between the second ring plate and the device body is improved, thereby reducing air leakage, and multiple electric push rods are used to drive the fourth ring plate to drive the third ring plate to move downward, and the third ring plate presses down the sealing ring, so that the sealing ring and the sealing groove are plugged more tightly, further improving the sealing between the sealing ring and the sealing groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the body of the utility model;

[0018] Figure 3 This is a cross-sectional view of the second ring plate of the utility model;

[0019] Figure 4 This is a schematic diagram of a first sealing component of the utility model;

[0020] Figure 5 It is a top view of the device body of the present utility model.

[0021] The reference numerals are: 1, body; 2, cylinder; 3, first sealing assembly; 4, first bolt; 5, nut; 6, second sealing assembly; 7, second bolt; 8, annular groove; 9, third ring plate; 10, fourth ring plate; 11, long plate; 12, electric push rod;

[0022] first ring plate; 302, L-shaped plate; 303, first sealing sheet; 304, second sealing sheet;

[0023] 601, second ring plate; 602, sealing ring; 603, sealing groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Refer to the instruction manual Figure 1-5The utility model provides a fluidized bed boiler separator center cylinder sealing device, including a body 1 and a cylinder 2, the cylinder 2 is arranged at the top of the body 1, the outer wall of the cylinder 2 is sleeved with a first sealing component 3, the first sealing component 3 includes a first ring plate 301, the first ring plate 301 is fixedly sleeved on the outer wall of the cylinder 2, and the top and outer side wall of the first ring plate 301 are in contact with the inner wall of the body 1, the outer wall of the first ring plate 301 is provided with a plurality of L-shaped plates 302, the bottom end of each L-shaped plate 302 is provided with a first sealing sheet 303, and the top end of each L-shaped plate 302 is provided with a second sealing sheet 304;

[0026] In addition, the second sealing sheet 304, the L-shaped plate 302 and the first sealing sheet 303 are fixed by the first bolt 4 and the nut 5, and the multiple L-shaped plates 302 and the first ring plate 301 are fixed by the second bolt 7, which is convenient for disassembling the L-shaped plate 302. A gap is formed between each L-shaped plate 302, each first sealing sheet 303 and each second sealing sheet 304 and the inner wall of the body 1. The flow velocity of the smoke can be reduced when flowing in the gap, thereby reducing the impact of the smoke on the first ring plate 301.

[0027] During use, when the flue gas in the device body 1 flows upward, when the flue gas passes through the gaps between the multiple first sealing sheets 303, the multiple second sealing sheets 304 and the device body 1, the first sealing sheets 303 and the second sealing sheets 304 will produce resistance to the flue gas, reducing the speed of the flue gas flowing to the first ring plate 301, thereby reducing air leakage in the gaps between the first ring plate 301, the cylinder 2 and the device body 1. After long-term use, the cylinder 2 can be taken out of the device body 1 first, and then the multiple second bolts 7 can be loosened to remove the L-shaped plate 302 from the first ring plate 301, and then the first bolt 4 can be loosened to disassemble the first sealing sheet 303 and the second sealing sheet 304 for cleaning and replacement.

[0028] Refer to the instruction manual Figure 1-5 The outer wall of the cylinder 2 is sleeved with a second sealing component 6, and the second sealing component 6 is arranged above the body 1. Specifically, the second sealing component 6 includes a second ring plate 601, and the second ring plate 601 is fixedly sleeved on the outer wall of the cylinder 2. A sealing ring 602 is provided at the bottom of the second ring plate 601. A sealing groove 603 adapted to the sealing ring 602 is opened at the top of the body 1. The sealing ring 602 is inserted into the sealing groove 603. By plugging the sealing ring 602 into the sealing groove 603, the sealing between the cylinder 2 and the body 1 can be greatly improved, thereby further reducing air leakage;

[0029] In addition, the sealing ring 602 is made of refractory silicone. Specifically, refractory silicone is a high-temperature refractory material with excellent high-temperature resistance, corrosion resistance, wear resistance and other characteristics, so the fire resistance of the sealing ring 602 can be improved. The bottom of the second ring plate 601 is provided with an annular groove 8, and a third ring plate 9 is slidably arranged in the annular groove 8. The bottom of the third ring plate 9 is bonded to the top of the sealing ring 602, so that the sealing ring 602 can be easily torn off from the third ring plate 9 and replaced.

[0030] Moreover, a fourth ring plate 10 is fixedly provided on the top of the third ring plate 9, and the top of the fourth ring plate 10 passes through the top of the second ring plate 601. A plurality of long plates 11 are fixedly provided on the outer wall of the fourth ring plate 10, and an electric push rod 12 is fixedly provided at the bottom of each long plate 11. The electric push rod 12 is fixedly embedded in the top of the second ring plate 601 to facilitate the adjustment of the height of the fourth ring plate 10.

[0031] A sealing ring 602 is arranged at the bottom of the second ring plate 601. The sealing ring 602 is made of fire-resistant silicone and has good fire resistance. At the same time, the sealing ring 602 is inserted into the sealing groove 603 to improve the sealing between the second ring plate 601 and the device body 1, thereby reducing air leakage. In addition, a plurality of electric push rods 12 are used to drive the fourth ring plate 10 to drive the third ring plate 9 to move downward. The third ring plate 9 presses down the sealing ring 602, so that the sealing ring 602 and the sealing groove 603 are more tightly plugged in, thereby further improving the sealing between the sealing ring 602 and the sealing groove 603.

[0032] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. Fluidized bed boiler separator center tube sealing device, characterized by: The device comprises a body (1) and a cylinder (2), wherein the cylinder (2) is arranged at the top of the body (1), and the outer wall of the cylinder (2) is sleeved with a first sealing assembly (3), wherein the first sealing assembly (3) comprises a first ring plate (301), the first ring plate (301) is fixedly sleeved on the outer wall of the cylinder (2), and the top and outer wall of the first ring plate (301) are in contact with the inner wall of the body (1); The outer wall of the first ring plate (301) is provided with a plurality of L-shaped plates (302), the bottom end of each L-shaped plate (302) is provided with a first sealing sheet (303), the top end of each L-shaped plate (302) is provided with a second sealing sheet (304), and the second sealing sheet (304), the L-shaped plate (302) and the first sealing sheet (303) are fixed by means of a first bolt (4) and a nut (5); The outer wall of the cylinder (2) is sleeved with a second sealing component (6), and the second sealing component (6) is arranged above the vessel body (1) to improve the sealing performance between the cylinder (2) and the vessel body (1).

2. The sealing device for the central tube of a fluidized bed boiler separator according to claim 1, characterized in that: The plurality of L-shaped plates (302) are fixed to the first ring plate (301) via second bolts (7), thereby facilitating the removal of the L-shaped plates (302).

3. The sealing device for the central tube of a fluidized bed boiler separator according to claim 1, characterized in that: A gap is formed between each L-shaped plate (302), each first sealing sheet (303), each second sealing sheet (304), and the inner wall of the vessel body (1).

4. The sealing device for the central tube of a fluidized bed boiler separator according to claim 1, characterized in that: The second sealing assembly (6) comprises a second ring plate (601), the second ring plate (601) being fixedly sleeved on the outer wall of the cylinder (2), a sealing ring (602) being provided at the bottom of the second ring plate (601), a sealing groove (603) matching the sealing ring (602) being provided at the top of the body (1), and the sealing ring (602) being inserted into the sealing groove (603).

5. The sealing device for the central tube of a fluidized bed boiler separator according to claim 4, characterized in that: The sealing ring (602) is made of fire-resistant silica gel, and is used to improve the fire resistance of the sealing ring (602).

6. The sealing device for the central tube of a fluidized bed boiler separator according to claim 4, characterized in that: An annular groove (8) is provided at the bottom of the second ring plate (601), a third ring plate (9) is slidably arranged in the annular groove (8), and the bottom of the third ring plate (9) is bonded to the top of the sealing ring (602).

7. The sealing device for the central tube of a fluidized bed boiler separator according to claim 6, characterized in that: A fourth ring plate (10) is fixedly provided on the top of the third ring plate (9), the top of the fourth ring plate (10) passes through the top of the second ring plate (601), a plurality of long plates (11) are fixedly provided on the outer wall of the fourth ring plate (10), an electric push rod (12) is fixedly provided on the bottom of each long plate (11), and the electric push rod (12) is fixedly embedded in the top of the second ring plate (601) to facilitate the adjustment of the height of the fourth ring plate (10).

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