Cross-shaped anti-abrasion structure of CFB (circulating fluid bed) boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a cross-shaped abrasion-proof structure of a CFB (circulating fluid bed) boiler, which comprises a transverse plate and a vertical plate, the transverse plate and the vertical plate are clamped together through a mortise and tenon joint structure to form a cross shape, and a movable gap is reserved; clamping grooves are symmetrically formed in the transverse plate, and a plurality of sawteeth are evenly distributed on the side, away from the clamping grooves, of the transverse plate. During use, the transverse plate is clamped on the wall of a water-cooled tube, the sawtooth side of the transverse plate is lower than the wall of a boiler, the vertical plate is connected with the transverse plate in a mortise and tenon joint mode, and the two ends of the vertical plate are welded to the fins. At the moment, the vertical plate is fixed, the transverse plate is inclined under the action of a dynamic field in the furnace to play a role in guiding, and meanwhile, large particles can be prevented from rebounding to the water cooling pipe according to the inclination direction to avoid impact abrasion; in addition, the transverse plate adopts a sawtooth-shaped outer edge, most of wall-attached materials fall from sawteeth and participate in heat exchange of the water cooling wall, and the heat exchange efficiency is improved; meanwhile, the sawtooth structure can reduce resistance to a near-wall flow field, material flow can be dredged, and the flow rate of gas-solid flow in the furnace is not reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a cross-shaped anti-wear structure of a CFB boiler. Background Art

[0002] The wear prevention of CFB boiler water-cooled wall has always been the primary problem plaguing the boiler industry. Some old boilers cannot be structurally improved and anti-wear measures must be taken. The current anti-wear methods include anti-wear beams, spraying, cladding, amorphous alloys, etc.

[0003] The grid anti-wear technology is becoming increasingly mature and can replace spraying, anti-wear beams, and cladding as a cost-effective choice for CFB boiler water-cooled wall wear protection. However, no technology is perfect, and the grid anti-wear technology is still the same. For example, grid anti-wear requires regional construction and a relatively large layout, which is not suitable for small-area protection. However, sometimes only a small area needs to be protected. If other areas are covered at the same time, it will not only increase costs, but also affect heat exchange in other areas.

[0004] To this end, the utility model provides a cross-shaped anti-wear structure for a CFB boiler, which can be flexibly adjusted according to the size of the wear part. Utility Model Content

[0005] The utility model aims to solve the problems existing in the prior art and proposes a cross-shaped anti-wear structure for a CFB boiler.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A cross-shaped anti-wear structure for a CFB boiler, comprising a horizontal plate and a vertical plate, wherein the horizontal plate and the vertical plate are clamped together by a mortise and tenon structure to form a cross shape, and a movable gap is left;

[0008] The horizontal plate is symmetrically provided with card slots, and a plurality of saw teeth are evenly distributed on the side away from the card slots;

[0009] The vertical plate is provided with welding points at both upper and lower ends.

[0010] Preferably, the horizontal plate includes a cross-shaped opening groove, two opposite side walls of the opening groove are provided with side wings, two card slots are respectively arranged on the same side walls of the two side wings, and a slot matching the opening groove is provided on the vertical edge of the vertical plate.

[0011] Preferably, the thickness of the vertical plate is smaller than the width of the opening slot, and the height of the slot is greater than the thickness of the horizontal plate.

[0012] Preferably, a circular groove is provided on the vertical side of the vertical plate, one side of the circular groove is open, a chuck is rotatably installed in the circular groove, and the slot is arranged on the side wall of the chuck located on the side of the circular groove opening.

[0013] Preferably, an arc-shaped plate is provided on the side of the chuck extending into the circular groove, and limiting plates cooperating with the two ends of the arc-shaped plate are provided at the upper and lower ends of the opening of the circular groove.

[0014] Preferably, the saw teeth are trapezoidal saw teeth.

[0015] Preferably, the saw teeth are pointed saw teeth.

[0016] Preferably, both the horizontal plate and the vertical plate have the characteristics of high thermal conductivity, high wear resistance and high temperature resistance.

[0017] Preferably, high-position bosses are symmetrically provided on both side end surfaces of the opening slot along the vertical wing direction, and the height of the high-position bosses is greater than the height of the slot.

[0018] Compared with the prior art, the utility model provides a cross-shaped anti-wear structure for a CFB boiler, which has the following beneficial effects:

[0019] 1. When in use, the horizontal plate is clamped on the water-cooled tube wall, the serrated side of the horizontal plate is lower than the boiler wall, the vertical plate is connected to the horizontal plate by mortise and tenon joints, and the welding points at both ends of the vertical plate are respectively welded to the fins at the upper and lower ends; at this time, the vertical plate is fixed, and because there is a movable gap between the horizontal plate and the vertical plate, the horizontal plate can be slightly movable after being connected to the vertical plate, so that the horizontal plate can be tilted up and down under the action of the dynamic field in the furnace, which plays a role of guiding the flow. At the same time, according to the tilting direction, it can also prevent large particles from rebounding to the water-cooled tube to avoid impact wear; in addition, the horizontal plate adopts a serrated outer edge, and the flow of materials attached to the wall is blocked by the water-cooled wall, but most of them can continue to fall from the serrations and participate in the water-cooled wall heat exchange near the wall, which can improve the heat exchange efficiency compared with the existing anti-wear grille; at the same time, the serrated structure can reduce the resistance of the existing grille anti-wear to the near-wall flow field, which can not only guide the material flow, but also does not reduce the flow rate of the gas-solid flow in the furnace.

[0020] 2. The horizontal and vertical boards are connected by mortise and tenon joints to form a cross structure. A variety of distribution combinations can be used in conjunction with each other to address various scenarios such as local wear, long strip wear, and large block wear.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the mortise and tenon connection between the horizontal plate and the vertical plate of the utility model.

[0023] Figure 2 It is a schematic diagram of the horizontal plate of the tip sawtooth of the utility model.

[0024] Figure 3 It is a schematic diagram of the horizontal plate of the trapezoidal sawtooth of the present utility model.

[0025] Figure 4 These are two structural schematic diagrams of the vertical plate of the utility model.

[0026] Figure 5 This is a schematic diagram of the first application scenario of the utility model.

[0027] Figure 6 This is a schematic diagram of a second application scenario of the present utility model.

[0028] Figure 7 This is a schematic diagram of a third application scenario of the present utility model.

[0029] Figure 8 This is a schematic diagram of a fourth application scenario of the present utility model.

[0030] In the figure: 1, horizontal plate; 2, vertical plate; 3, slot; 4, serration; 5, open slot; 6, slot; 7, high-position boss; 8, chuck; 9, arc plate; 10, limit plate. DETAILED DESCRIPTION

[0031] The following will be combined with the attached embodiment of the utility model Figure 1-8 , the technical solutions in the embodiments of the utility model are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0032] Embodiment 1, in order to solve the problems existing in the prior art, this embodiment provides a cross-shaped anti-wear structure of a CFB boiler, comprising a horizontal plate 1 and a vertical plate 2, the horizontal plate 1 and the vertical plate 2 are clamped together by a mortise and tenon structure to form a cross shape, and a movable gap is left;

[0033] The horizontal plate 1 is symmetrically provided with a card slot 3, and a plurality of saw teeth 4 are evenly distributed on the side away from the card slot 3, and the saw teeth 4 are any one of a pointed saw tooth or a trapezoidal saw tooth;

[0034] The vertical plate 2 is provided with welding points at both upper and lower ends.

[0035] Both the horizontal plate 1 and the vertical plate 2 have the characteristics of high thermal conductivity, high wear resistance and high temperature resistance, so that the cross mortise and tenon structure has the effect of heat conduction and diversion, and has a long service life and will not be easily damaged.

[0036] When in use, the horizontal plate 1 is clamped on the water-cooling tube wall without welding, and can move freely along the water-cooling tube to a certain extent. The serration 4 side of the horizontal plate 1 is lower than the boiler wall, the vertical plate 2 is connected to the horizontal plate 1 by mortise and tenon joints, and the welding points at both ends of the vertical plate 2 are respectively welded to the fins at the upper and lower ends; at this time, the vertical plate 2 is fixed, and because there is a movable gap between the horizontal plate 1 and the vertical plate 2, the horizontal plate 1 can move slightly after being connected to the vertical plate 2, so that the horizontal plate 1 can tilt up and down under the action of the dynamic field in the furnace, playing a role of guiding the flow in the direction of the trend, and at the same time, according to the tilting direction, it can also prevent large particles from rebounding to the water-cooling tube, causing impact wear; in addition, the horizontal plate 1 adopts a serration 4-shaped outer edge, and the wall-attached material flow is blocked by the water-cooling wall, but most of it continues to fall from the serration 4 and participates in the water-cooling wall heat exchange near the wall. Compared with the existing anti-wear grille, the heat exchange efficiency can be improved; at the same time, the serration 4 structure can reduce the resistance of the existing grille anti-wear to the near-wall flow field, which can both guide the material flow and not reduce the flow rate of the gas-solid flow in the furnace.

[0037] In addition, the horizontal board 1 and the vertical board 2 are connected by mortise and tenon joints to form a cross structure, which can be used in a variety of scenarios:

[0038] (1) Minor local wear: refer to the attached Figure 5 As shown, after the horizontal board 1 and the vertical board 2 are connected with mortise and tenon joints, the worn parts can be covered;

[0039] (2) Long strip wear: refer to the attached Figure 6 As shown, multiple groups of cross mortise and tenon structures are arranged transversely to cover the worn parts;

[0040] (3) Inclined wear: Refer to the attached Figure 7 As shown, multiple groups of cross mortise and tenon structures are distributed obliquely to cover the worn parts;

[0041] (4) Wear in larger areas: refer to the attached Figure 8 As shown, multiple groups of cross mortise and tenon structures are distributed in a grid-like manner to cover the worn areas.

[0042] Embodiment 2, this embodiment provides a specific mortise and tenon structure:

[0043] The horizontal plate 1 includes a cross-shaped opening groove 5, and side wings are provided on two opposite side walls of the opening groove 5. Two card slots 3 are respectively arranged on the same side walls of the two side wings. A slot 6 cooperating with the opening groove 5 is provided on the vertical edge of the vertical plate 2. The slot 6 is snapped into the opening groove 5, and the opening groove 5 and the slot 6 form a mortise and tenon structure, so that the horizontal plate 1 and the vertical plate 2 are connected.

[0044] The open slot 5 is symmetrically provided with high bosses 7 on both side end faces along the vertical wing direction. The height of the high bosses 7 is greater than the height of the slots 6. The high bosses 7 are used to limit and prevent the horizontal plate 1 from detaching from the vertical plate 2.

[0045] Embodiment 3, based on Embodiment 2, provides two structures that can allow the horizontal board 1 to be slightly offset on the vertical board 2:

[0046] The first type: the thickness of the vertical board 2 is smaller than the width of the opening slot 5, and the height of the slot 6 is greater than the thickness of the horizontal board 1, so that the horizontal board 1 has a margin in the slot 6, and can then be slightly moved after installation;

[0047] The second type: a circular groove is provided on the vertical edge of the vertical plate 2, and one side of the circular groove is open. A chuck 8 is rotatably installed in the circular groove. The slot 6 is provided on the side wall of the chuck 8 on the side of the circular groove opening. After the open slot 5 is embedded in the slot 6, the cross plate 1 is limited on the chuck 8. Since the chuck 8 is movably installed, the cross plate 1 can be offset; and an arc-shaped plate 9 is provided on the side of the chuck 8 extending into the circular groove. Limiting plates 10 that cooperate with the two ends of the arc-shaped plate 9 are provided at the upper and lower ends of the opening of the circular groove. The limiting plates 10 are located on both sides of the chuck 8, so that the chuck 8 can only deflect within the circle range of the two limiting plates 10, thereby limiting the offset range of the cross plate 1.

[0048] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A cross-shaped anti-wear structure for a CFB boiler, characterized in that: It comprises a horizontal plate (1) and a vertical plate (2), wherein the horizontal plate (1) and the vertical plate (2) are connected together by a mortise and tenon structure to form a cross shape and a movable gap is left; The horizontal plate (1) is symmetrically provided with a card slot (3), and a plurality of saw teeth (4) are evenly distributed on a side away from the card slot (3); The vertical plate (2) is provided with welding points at both upper and lower ends.

2. A cross-shaped anti-wear structure for a CFB boiler according to claim 1, characterized in that: The horizontal plate (1) comprises a cross-shaped opening groove (5), two opposite side walls of the opening groove (5) are provided with side wings, two clamping grooves (3) are respectively arranged on the same side walls of the two side wings, and a slot (6) matching with the opening groove (5) is provided on the vertical side of the vertical plate (2).

3. A cross-shaped anti-wear structure for a CFB boiler according to claim 2, characterized in that: The thickness of the vertical plate (2) is smaller than the width of the opening slot (5), and the height of the slot (6) is greater than the thickness of the horizontal plate (1).

4. A cross-shaped anti-wear structure for a CFB boiler according to claim 2, characterized in that: A circular groove is provided on the vertical side of the vertical plate (2), one side of the circular groove is open, a chuck (8) is rotatably mounted in the circular groove, and the slot (6) is provided on the side wall of the chuck (8) located on the side of the circular groove opening.

5. A cross-shaped anti-wear structure for a CFB boiler according to claim 4, characterized in that: An arc-shaped plate (9) is provided on the side of the chuck (8) extending into the circular groove, and limit plates (10) cooperating with the two ends of the arc-shaped plate (9) are provided at both upper and lower ends of the opening of the circular groove.

6. A cross-shaped anti-wear structure for a CFB boiler according to claim 1, characterized in that: The saw teeth (4) are trapezoidal saw teeth.

7. A cross-shaped anti-wear structure for a CFB boiler according to claim 4, characterized in that: The saw teeth (4) are pointed saw teeth.

8. The cross-shaped anti-wear structure of a CFB boiler according to claim 1, characterized in that: The horizontal plate (1) and the vertical plate (2) both have the characteristics of high thermal conductivity, high wear resistance and high temperature resistance.

9. A cross-shaped anti-wear structure for a CFB boiler according to claim 2, characterized in that: High-position bosses (7) are symmetrically provided on both side end surfaces of the opening slot (5) along the vertical wing direction, and the height of the high-position bosses (7) is greater than the height of the slot (6).

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