CFB boiler four-corner protection structure

Abstract

The utility model discloses a CFB (circulating fluid bed) boiler four-corner protection structure, which relates to the technical field of boiler wear resistance and comprises a transverse wear-resisting plate, a transverse wear-resisting plate and a transverse wear-resisting plate, the blocking bodies are vertically arranged on the upper side and the lower side of the two ends of the transverse wear-resisting plate and used for blocking particles transversely moving towards the corners of the tube panel; the blocking bodies on the upper sides of the two ends of the transverse wear-resisting plate can block particles collected towards the corners on the two sides, material particles on the two sides are prevented from being collected at the corners, impact abrasion of the material particles to the corners of the boiler is reduced, the maintenance rate is reduced, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler anti-abrasion technical field, especially to CFB boiler four corner protection structure. BACKGROUND

[0002] Biomass circulating fluidized bed boiler is also called CFB boiler, and in the CFB boiler, coal ash, limestone and other particles are upwardly moved in the furnace under the action of wind force and form high-speed particle flow. At different heights in the furnace, some large particles fall along the side wall of the furnace and form internal circulation of the material, and these wall-attached falling particles form wall-attached flow, which causes the water-cooled tubes and fins of the boiler water-cooled wall to be abraded.

[0003] A grid wear-resistant plate is welded on the inner side of the boiler water-cooled wall to promote vortex generation and reduce the impact force of the wall-attached particles, thereby reducing the abrasion of the material particles on the water-cooled tubes and fins. The grid wear-resistant plate includes a vertical flow guide wear-resistant plate and a horizontal buffer wear-resistant plate, such as the patent CN217899848U.

[0004] Regarding the four-corner abrasion of the boiler water-cooled wall, the patent CN209246064U discloses a circulating fluidized bed boiler water-cooled wall four-corner anti-abrasion device, and the patent CN222459490U discloses an angle part anti-abrasion device for the furnace of a CFB boiler. Both of them are provided with horizontal wear-resistant plates that are adapted to the angle part, which can block the wall-attached falling particles and thereby reduce abrasion. However, the particles that are hindered by the horizontal wear-resistant plates on both sides of the angle part will impact the angle part of the tube panel, and therefore, the angle part is not only impacted by the vertically wall-attached falling particles, but also impacted by the particles on both sides, forming multi-directional impact and causing the angle part of the water-cooled wall to be abraded. SUMMARY

[0005] The utility model discloses a CFB boiler four corner protection structure.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The CFB boiler four corner protection structure comprises:

[0008] A horizontal wear-resistant plate is horizontally arranged on the inner side of the angle part of the tube panel.

[0009] A blocking body is vertically arranged on the upper and lower sides of both ends of the horizontal wear-resistant plate to block the particles that horizontally move towards the angle part of the tube panel.

[0010] Further, the blocking body is an arc-shaped plate, which is perpendicularly connected with the horizontal wear-resistant plate. The arc-shaped plates on the upper and lower sides of the horizontal wear-resistant plate correspond to each other, and the outer arc surface of the arc-shaped plate faces the angle part of the tube panel.

[0011] Further, the transverse wear plate is a hexagonal plate structure; the transverse wear plate comprises a first side abutting the corner fin, two second sides abutting the fins on two sides of the corner respectively, two third sides corresponding to the buffer wear plates on two sides of the corner, and a suspended side; arc-shaped notches abutting the outer side of the corner water cooling pipe are arranged between the two ends of the first side and the second side; the lower ends of the arc-shaped plate extend to the second side and the suspended side respectively, and the inner arc surface of the arc-shaped plate faces the third side.

[0012] Further, the blocking body comprises a plurality of columns arranged on the upper and lower sides of the end of the transverse wear plate, and the columns are vertically connected with the transverse wear plate.

[0013] Further, the columns are arranged in a plurality of rows from the end of the transverse wear plate to the center, and the columns in adjacent rows are staggered.

[0014] Further, the vertical span of the columns in the same row is the same; and the vertical span of the columns in each row from the end of the transverse wear plate to the center gradually decreases.

[0015] Compared with the prior art, the transverse wear plate has the following beneficial effects:

[0016] The blocking body on the upper side of the two ends of the transverse wear plate can block the particles collected on the two sides of the corner, inhibit the collection of the material particles on the two sides of the corner, reduce the impact and wear of the material particles on the corner of the boiler, reduce the maintenance rate, and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the installation state of the embodiment 1.

[0018] Figure 2 It is a top view structure schematic view of the installation state of the embodiment 1.

[0019] Figure 3 It is a top view schematic view of the embodiment 1.

[0020] Figure 4 It is a three-dimensional schematic view of the embodiment 1.

[0021] Figure 5 It is a three-dimensional structure schematic view of the installation state of the embodiment 2.

[0022] Figure 6 It is a top view structure schematic view of the installation state of the embodiment 2.

[0023] Figure 7 It is a top view schematic view of the embodiment 2.

[0024] Figure 8 It is a three-dimensional schematic view of the embodiment 2.

[0025] In the figure: 1, transverse wear plate; 2, arc plate; 3, stand; 4, water cooling pipe; 5, fin; 6, buffer wear plate;

[0026] 101, first side; 102, second side; 103, third side; 104, overhanging side; 105, arc-shaped notch. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only a part of the embodiments of the utility model, but not all the embodiments.

[0028] Specific embodiment 1 of the CFB boiler four-corner protection structure provided by the utility model:

[0029] Please refer to Figures 1-4 , the CFB boiler four-corner protection structure, including transverse wear plate 1 and blocking body.

[0030] In this embodiment, as Figure 2 shown, the boiler tube panel corner part has two water cooling pipes 4, and the two water cooling pipes 4 have inclined fins 5 between them; the two water cooling pipes 4 are connected to the straightly arranged water cooling pipes 4 and fins 5 on both sides; the fins 5 on both sides of the corner part are in a vertical relationship.

[0031] The transverse wear plate 1 is transversely arranged inside the boiler tube panel corner part, and the transverse wear plate 1 is a hexagonal plate structure; the transverse wear plate 1 is connected to the inside of the tube panel by welding.

[0032] The transverse wear plate 1 includes a first side 101 attached to the corner fin 5, two second sides 102 respectively attached to the fins 5 on both sides of the corner, two third sides 103 corresponding to the buffer wear plates 6 on both sides of the corner, and an overhanging side 104.

[0033] The two second sides 102 are adjacent to the first side 101; the two third sides 103 are adjacent to the overhanging side 104; the two second sides 102 are adjacent to the two third sides 103 respectively; the first side 101 is opposite to the overhanging side 104. In this embodiment, the two third sides 103 are located at both ends of the transverse wear plate 1.

[0034] Arc-shaped notches 105 are provided between the two ends of the first side 101 and the second side 102, which are attached to the outside of the corner water cooling pipe 4; the arc-shaped notches 105 form a concave transition between the first side 101 and the second side 102; so that the transverse wear plate 1 can be closely attached to the fins 5 and water cooling pipes 4 of the corner.

[0035] The connecting part of the arc-shaped notch 105 with the first side 101 and the connecting part of the arc-shaped notch 105 with the second side 102 are provided with a round corner, so that the first side 101 is better attached to the corner fin 5 and the second side 102 is better attached to the fins on both sides of the corner, thereby facilitating the welding of the transverse wear plate 1 to the boiler corner.

[0036] During welding construction, the transverse wear plate 1 is vertically arranged along the boiler corner.

[0037] The blocking body is vertically arranged on the upper and lower sides of the two ends of the transverse wear plate 1, and the blocking body blocks the particles moving horizontally to the tube panel corner. In the embodiment, the blocking body is an arc-shaped plate 2, and the arc-shaped plate 2 is vertically connected with the transverse wear plate 1.

[0038] The arc-shaped plates 2 at the two ends of the transverse wear plate 1 have a gap therebetween, and the material particles falling vertically at the corner impact the upper side of the transverse wear plate 1 between the arc-shaped plates 2 and can be discharged through the gap between the arc-shaped plates 2.

[0039] The lower ends of the arc-shaped plates 2 respectively extend to the end of the second side 102 close to the arc-shaped notch 105 and the end of the overhanging side 104 close to the third side 103, that is, the two vertical planes of the arc-shaped plates 2 are flush with the second side 102 and the overhanging side 104.

[0040] The inner arc surface of the arc-shaped plate 2 faces the third side 103, and the material particles inclined downward impact the tube panel corner after impacting the buffer wear plate 6, and the inner arc surface of the arc-shaped plate 2 blocks the material particles, and the arc-shaped plates 2 at the two ends of the transverse wear plate 1 block the impact of the particles on both sides, thereby reducing the impact of the water-cooled pipes 4 and the fins 5 of the tube panel corner on both sides and reducing the wear of the corner.

[0041] The arc-shaped plate 2 on the lower side of the transverse wear plate 1 mainly blocks the impact of the particles of the vortex airflow on the corner, thereby comprehensively protecting the water-cooled pipes 4 and the fins 5 of the tube panel corner.

[0042] The specific embodiment 2 of the CFB boiler four-corner protection structure provided by the utility model is as follows:

[0043] Please refer to Figures 5-8 The difference between the embodiment and the embodiment 1 is that the blocking body in the embodiment 1 is an arc-shaped plate 2, and in the embodiment, the blocking body comprises a plurality of vertical columns 3 arranged on the upper and lower sides of the end of the transverse wear plate 1, and the vertical columns 3 are vertically connected with the transverse wear plate 1.

[0044] In the embodiment, the columns 3 are arranged in several rows from the end of the transverse wear plate 1 to the center, and the adjacent rows of columns 3 stagger correspond to the buffer wear plate 6; the columns 3 in the same row have the same vertical span; the vertical span of the columns 3 in each row from the end of the transverse wear plate 1 to the center gradually decreases. With the weakening of the impact force of the material particles, the height of the columns 3 is reduced from outside to inside.

[0045] In the embodiment, the columns 3 are arranged in three rows, and the number of rows from the end of the transverse wear plate 1 to the center decreases in turn, so that the columns 3 between the two ends of the transverse wear plate 1 have a larger gap, and the wall-adhering material particles falling vertically can pass through smoothly.

[0046] The arc-shaped plate 2 can block the transversely moving material particles, but has a strong blocking effect on the airflow, which affects the circulation of the airflow and the corner gas, thereby causing the heat exchange effect of the corner water-cooled pipe 4 to decrease. In the embodiment, the columns 3 are uniformly arranged, and in the process of the airflow and the material particles passing through the columns 3 from the side, the columns 3 reduce the blocking effect on the airflow compared with the arc-shaped plate 2, promote the circulation and exchange of the corner airflow, ensure the heat exchange effect of the corner water-cooled pipe 4, and at the same time, the columns 3 can block the material particles, reduce the impact speed of the particles, change the direction of the particles, thereby reducing the impact of the particles on the corner, and also achieving the effect of reducing wear.

[0047] The above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified without creative labor, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A CFB boiler four-corner protection structure, characterized in that, The utility model relates to a boiler tube screen corner protection device, including: A transverse wear plate (1) is arranged transversely inside the boiler tube screen corner; A blocking body is arranged vertically on the upper and lower sides of the two ends of the transverse wear plate (1) to block the particles moving transversely to the tube screen corner.

2. The CFB boiler quadrilateral protection structure according to claim 1, characterized in that, The blocking body is an arc-shaped plate (2) which is connected perpendicularly to the transverse wear plate (1); the arc-shaped plates (2) on the upper and lower sides of the transverse wear plate (1) correspond to each other; and the outer arc surface of the arc-shaped plate (2) faces the tube screen corner.

3. The CFB boiler quadrilateral protection structure according to claim 2, characterized in that, The transverse wear plate (1) is a hexagonal plate structure; the transverse wear plate (1) includes a first side (101) which is attached to the corner fin (5), two second sides (102) which are respectively attached to the fins (5) on the two sides of the corner, two third sides (103) which correspond to the buffer wear plates (6) on the two sides of the corner, and a suspended side (104); arc-shaped notches (105) which are attached to the outer sides of the corner water-cooled pipes (4) are arranged between the two ends of the first side (101) and the second side (102); the lower two ends of the arc-shaped plate (2) extend to the second side (102) and the suspended side (104) respectively, and the inner arc surface of the arc-shaped plate (2) faces the third side (103).

4. The CFB boiler quadrilateral protection structure according to claim 1, characterized in that, The blocking body includes a plurality of vertical columns (3) arranged on the upper and lower sides of the end of the transverse wear plate (1); the vertical columns (3) are connected perpendicularly to the transverse wear plate (1).

5. The CFB boiler quadrilateral protection structure according to claim 4, characterized in that, The vertical columns (3) are arranged in a plurality of rows from the end of the transverse wear plate (1) to the center; the adjacent rows of vertical columns (3) are staggered and correspond to each other.

6. The CFB boiler quadrilateral protection structure according to claim 5, characterized in that, The vertical columns (3) in the same row have the same vertical span; the vertical span of the vertical columns (3) in each row gradually decreases from the end of the transverse wear plate (1) to the center.

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