Thermal-expansion-resistant heat insulation air distribution device

Abstract

The utility model discloses an anti-thermal-expansion heat insulation air distribution device which comprises an air distribution plate, a bed frame and an air chamber wall, the air distribution plate is a circular steel plate, and air cap holes are formed in the air distribution plate; a plurality of bolt holes are formed in the edge, and a slag falling hole is formed in the center; the air distribution plate is arranged on the bed frame; the bed frame is an annular steel plate, a plurality of kidney-shaped holes are formed in the inner edge of the bed frame, the opening positions of the kidney-shaped holes are aligned with the bolt holes in the air distribution plate, and the bed frame and the air distribution plate are fixed in the mode that bolts penetrate through the kidney-shaped holes and the bolt holes; a plurality of pairs of lug plates are arranged on the edge of the bed frame, and the lug plates are arranged in pairs; the lug plate is connected with a lifting lug through a pin shaft, and the lifting lug is connected with a hanger through another pin shaft; a plurality of pairs of hanging lugs are arranged on the support in pairs. When the fluidized bed operates stably, the air distribution plate is in a heated expansion state, and the bolts in the bolt holes in the air distribution plate can slide in the kidney-shaped holes of the bed frame, so that the deformation of the air distribution plate relative to the bed frame is absorbed; in an under-bed ignition stage of the fluidized bed, the bed frame is heated to expand, and deformation relative to the support can be absorbed by swinging of the lifting lugs.

Description

Technical Field

[0001] This utility model relates to the field of thermal expansion resistance technology for fluidized bed boilers, and in particular to an insulating air distribution device for thermal expansion resistance. Background Technology

[0002] Fluidized bed boilers have a wide range of applications, and the air distribution plate is an important component of fluidized bed boilers. In adiabatic fluidized bed boilers, due to design and cost considerations, adiabatic air distribution plate devices are often used. However, the adiabatic air distribution plate will undergo thermal expansion when heated, resulting in deformation, which will cause cracks at the connection between the air distribution plate and the fluidized bed furnace wall, and may even affect the service life of the air distribution plate.

[0003] Current methods for counteracting thermal expansion in thermal insulation air distribution devices include: using thin-plate air distribution panels, allowing them to deform freely, but this has a certain impact on the uniformity of fluidizing air and can cause pits to form on the air distribution panels, making it easy for large particles or lumps of material to accumulate on them; using flange clamping, but it is necessary to fully consider whether the deformation of the flange will affect the free expansion of the air distribution panels; or using segmented assembled air distribution panels, but improper handling can easily cause fluidizing air to flow out from the gaps, forming an air curtain and hindering the uniformity of fluidization. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model designs a thermally insulating air distribution device that resists thermal expansion, which can fully absorb the thermal expansion generated by the air distribution plate under high-temperature working environment and ensure the safe and stable operation of the air distribution plate.

[0005] The present invention adopts the following technical solution:

[0006] A thermally resistant, heat-insulating air distribution device includes an air distribution plate, a bed frame, and an air chamber wall. The air distribution plate is a circular steel plate with several air cap holes for installing air caps. Several bolt holes are opened at the edge, and a slag discharge hole is opened in the center. The air distribution plate is placed on the bed frame.

[0007] The bed frame is a circular steel plate with several waist holes on the inner edge. The opening positions of the waist holes are aligned with the bolt holes on the air distribution plate. The bed frame and the air distribution plate are fixed together by bolts passing through the waist holes and bolt holes. Several pairs of ear plates are provided on the edge of the bed frame.

[0008] The ear plate is connected to the lifting lug by a pin, and the lifting lug is connected to the hanging lug by another pin; there are several pairs of hanging lugs, which are arranged in pairs on the bracket.

[0009] Preferably, a fluidized bed furnace wall is provided above the bed frame. The fluidized bed furnace wall is an insulated furnace with an internal heat-insulating and wear-resistant layer.

[0010] Preferably, the bed frame is provided with a channel steel ring, ribs and an air chamber wall below; the channel steel ring is closely connected to the ribs, and the ribs are closely connected to the air chamber wall; the channel steel ring is circular, and the ribs are provided with several.

[0011] Preferably, the wall of the air chamber is cylindrical, and the inner side is covered with a heat-insulating and wear-resistant layer.

[0012] Preferably, the air chamber wall has a fluidizing air channel on one side for introducing fluidizing air, and a corresponding slope on the other side, with two guide plates inside for guiding the fluidizing air.

[0013] Preferably, the guide plate is a bent steel plate.

[0014] Preferably, the lifting lug is a steel plate with double round holes.

[0015] Preferably, the slag discharge hole is circular and connected to a slag discharge pipe.

[0016] Preferably, the slag discharge pipe is provided with an expansion joint.

[0017] The beneficial effects of this invention are as follows: This invention uses bolts to fix the air distribution plate to the waist holes of the bed frame, and suspends the bed frame to the support through the connection structure of ear plates, lifting lugs, and hanging lugs. When the fluidized bed is running stably, the air distribution plate is in a state of thermal expansion, and the bolts in the bolt holes of the air distribution plate can slide in the waist holes of the bed frame, thereby absorbing the deformation of the air distribution plate relative to the bed frame. During the under-bed ignition stage of the fluidized bed, the bed frame expands due to heat, and the deformation relative to the support can be absorbed by the swinging of the lifting lugs. Therefore, this invention can ensure that the insulated air distribution device resists thermal expansion and operates stably and safely. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 yes Figure 1 An enlarged view of point I in the middle;

[0020] Figure 3 This is a top view of the air distribution plate in this utility model;

[0021] Figure 4 yes Figure 3 An enlarged view of section II;

[0022] Figure 5 This is a side view of the air distribution plate in this utility model;

[0023] Figure 6 yes Figure 5 An enlarged view of section III;

[0024] Figure 7 This is a top view of the bed frame in this utility model;

[0025] Figure 8 yes Figure 7A schematic diagram of the structure of IV;

[0026] Figure 9 This is a side view of the bed frame in this utility model;

[0027] Figure 10 yes Figure 9 A schematic diagram of a V-shaped structure;

[0028] Figure 11 yes Figure 1 A schematic diagram of a local structure in the CC direction;

[0029] Figure 12 This is a schematic diagram of one type of lifting lug in this utility model;

[0030] In the diagram: 1. Air distribution plate, 1-1. Air cap hole, 1-2. Bolt hole, 1-3. Slag discharge hole, 2. Bed frame, 2-1. Waist hole, 3. Channel steel ring, 4. Rib plate, 5. Air chamber wall, 6. Ear plate, 6-1. Pin, 6-2. Gasket, 7. Lifting lug, 8. Hanging lug, 9. Support, 10. Fluidized bed furnace wall, 11. Thermal insulation and wear-resistant layer, 12. Fluidized air channel, 13. Slag discharge pipe, 13-1. Expansion joint, 14. Guide plate, 15. Air cap, 16. Bolt. Detailed Implementation

[0031] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0032] Example: Figures 1-12 As shown, a thermal expansion resistant heat insulation air distribution device includes an air distribution panel 1, a bed frame 2, and an air chamber wall 5.

[0033] The air distribution plate 1 is a circular steel plate with several air cap holes 1-1 for installing air caps; several bolt holes 1-2 are opened at the edge, and a slag discharge hole 1-3 is opened in the center; the air distribution plate 1 is placed on the bed frame 2.

[0034] The bed frame 2 is a circular steel plate. Several waist holes 2-1 are opened on the inner edge of the bed frame 2. The opening position of the waist holes 2-1 is aligned with the bolt holes 1-2 on the air distribution plate 1. Several pairs of ear plates 6 are provided on the edge of the bed frame 2. The ear plates 6 are arranged in pairs for suspending the air distribution device.

[0035] The fluidized bed furnace wall 10 is provided above the bed frame 2. The fluidized bed furnace wall 10 is an insulated furnace and is lined with a heat-insulating and wear-resistant layer 11 inside.

[0036] The bed frame 2 is provided with a channel steel ring 3, a rib plate 4 and an air chamber wall 5 below it; the channel steel ring 3 is closely connected to the rib plate 4, and the rib plate 4 is closely connected to the air chamber wall 5; the channel steel ring 3 is circular, and there are several rib plates 4. The arrangement of the channel steel ring 3 and the rib plate 4 can play a reinforcing role.

[0037] The air chamber wall 5 is cylindrical, with an insulation and wear-resistant layer 11 laid on the inner side to adapt to the under-bed ignition working method; a fluidizing air channel 12 is opened on one side of the air chamber wall 5 for introducing fluidizing air, and a slope is provided on the other side, with two guide plates 14 inside for guiding the fluidizing air. The guide plates 14 are bent steel plates.

[0038] The bolt holes 1-2 on the air distribution plate 1 are aligned with the waist holes 2-1 on the bed frame 2 and are fixed by bolts 16. When the air distribution plate expands due to heat, the bolts 16 can slide in the waist holes 2-1 of the bed frame 2.

[0039] The ear plate 6 on the bed frame 2 is connected to the lug 7 by a pin 6-1, and the lug 7 is connected to the hanging lug 8 by another pin 6-1; the hanging lug 8 is provided in several pairs and is provided in pairs on the bracket 9; the lug 7 is a double-hole steel plate, and when the bed frame is heated and expands, the lug 7 can swing slightly, thereby absorbing the relative displacement between the ear plate 6 and the hanging lug 8.

[0040] The slag discharge hole 1-3 is circular and connected to a slag discharge pipe 13; the slag discharge pipe is provided with an expansion joint 13-1 to absorb the thermal expansion of the slag discharge pipe 13.

[0041] The above embodiments will be used for practical applications in the following sections.

[0042] During the ignition stage of the adiabatic fluidized bed, an under-bed ignition method is used. The bed frame 2, the air chamber wall 5, and the air distribution plate 1 expand due to heat. The ear plate 6 on the bed frame 2 shifts relative to the hanging ear 8, and the hanging ear 7 swings slightly to absorb the relative displacement between them. After ignition, during the stable operation stage of the fluidized bed, cooler fluidizing air is introduced into the air chamber wall 5. The bed frame 2 and the air chamber wall 5 recover their deformation, and the hanging ear 7 swings back to absorb the deformation. The adiabatic furnace is in a high-temperature state, and the air distribution plate 1 expands due to heat, causing the bolts 16 on the bolt holes 1-2 to slide in the waist holes 2-1 on the bed frame 2, absorbing the thermal expansion displacement of the air distribution plate 1. Therefore, this utility model can ensure that the adiabatic air distribution device resists thermal expansion and operates stably and safely.

[0043] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A heat expansion resistant, heat insulating cloth air distribution device comprising a cloth air distribution panel (1), a bedstead (2) and an air chamber wall (5), characterized in that, The air distribution plate (1) is a circular steel plate with several air cap holes (1-1) for installing air caps; several bolt holes (1-2) are opened at the edge, and a slag discharge hole (1-3) is opened in the center; the air distribution plate (1) is placed on the bed frame (2); The bed frame (2) is a circular steel plate. Several waist holes (2-1) are opened on the inner edge of the bed frame (2). The opening position of the waist holes (2-1) is aligned with the bolt holes (1-2) on the air distribution plate (1). The bed frame (2) and the air distribution plate (1) are fixed by bolts (16) passing through the waist holes (2-1) and bolt holes (1-2). Several pairs of ear plates (6) are provided on the edge of the bed frame (2). The ear plates (6) are arranged in pairs. The ear plate (6) is connected to the hanging ear (7) by a pin (6-1), and the hanging ear (7) is connected to the hanging ear (8) by another pin (6-1); the hanging ear (8) is provided in several pairs and is provided in pairs on the bracket (9).

2. A heat expansion resistant, insulated cloth air distribution device according to claim 1, characterized in that The fluidized bed furnace wall (10) is provided above the bed frame (2). The fluidized bed furnace wall (10) is an insulated furnace and is lined with a heat-insulating and wear-resistant layer (11).

3. A thermal expansion resistant, insulated cloth air distribution device according to claim 1, wherein, The bed frame (2) is provided with a channel steel ring (3), a rib plate (4) and a ventilation chamber wall (5) below it; the channel steel ring (3) is closely connected to the rib plate (4), and the rib plate (4) is closely connected to the ventilation chamber wall (5); the channel steel ring (3) is circular, and the rib plate (4) is provided with several.

4. A thermal expansion resistant, insulated cloth air distribution device according to claim 1, wherein, The air chamber wall (5) is cylindrical, and the inner side is covered with a heat-insulating and wear-resistant layer (11).

5. A thermal expansion resistant, insulated cloth air distribution device according to claim 1, wherein, The air chamber wall (5) has a fluidizing air channel (12) on one side for introducing fluidizing air, and a slope on the other side, with two guide plates (14) inside for guiding the fluidizing air.

6. A thermal expansion resistant, insulated cloth air distribution device according to claim 5, wherein, The guide plate (14) is a bent steel plate.

7. A thermal expansion resistant, insulated cloth air distribution device according to claim 1, wherein, The lifting lug (7) is a double-hole steel plate.

8. A thermal expansion resistant, insulated cloth air distribution device according to claim 1, wherein, The slag discharge hole (1-3) is circular and connected to a slag discharge pipe (13).

9. A thermal expansion resistant, insulated cloth air distribution device according to claim 8, wherein, An expansion joint (13-1) is provided on the slag discharge pipe.

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