Anti-abrasion device for reheater

Abstract

The utility model relates to the technical field of reheaters, in particular to an anti-abrasion device of a reheater, and aims to solve the technical problems that in the prior art, anti-abrasion tiles are tightly attached to reheating pipes, and anti-abrasion protective tiles are continuously scoured by high-temperature flue gas at the same position in a furnace and are prone to deformation and falling off. The anti-abrasion rotating shaft is rotationally connected into the reheater shell, the axis of the anti-abrasion rotating shaft and the axis of the upper steam pipe are located on the same vertical plane, the fan blades are connected to the portion, in the reheater shell, of the anti-abrasion rotating shaft, and the driving mechanism can drive the anti-abrasion rotating shaft to rotate and is connected to the anti-abrasion rotating shaft. Particles and dust in high-temperature flue gas directly irradiate the anti-abrasion rotating shaft and the fan blades from bottom to top, the driving mechanism drives the anti-abrasion rotating shaft and the fan blades to rotate, contact points of the particles and the dust with the anti-abrasion rotating shaft and the fan blades are continuously changed, and the problems that the same position of an anti-abrasion protection tile in the prior art is continuously scoured by the high-temperature flue gas and deforms and falls off are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a reheater technical field, and the specific field is a reheater anti-abrasion device. BACKGROUND

[0002] The reheater is an important component of the power station boiler, and its role is to heat the steam discharged from the high-pressure cylinder of the steam turbine again, to improve the steam temperature and then send it back to the intermediate-pressure cylinder of the steam turbine to continue to work, to further improve the thermal efficiency of the power plant cycle, to reduce the humidity of the water vapor, to be beneficial to the protection of the steam turbine blade, and to improve the relative internal efficiency and absolute internal efficiency of the steam turbine, which has important significance for improving the overall performance and economy of the large generator set.

[0003] The high-temperature reheater is internally composed of a tube screen formed by a plurality of tube bundles, which is usually directly suspended in the high-temperature reheater, and the tube bundle is relatively long, and in the long-time running process, the tube screen will be delayed by the reduced thermal intensity, which will cause the fly ash abrasion.

[0004] The anti-abrasion tile of the prior art is tightly attached to the reheating pipe, and the anti-abrasion tile is tightly attached to the reheating pipe using a clip and is welded to realize the fixing, the anti-abrasion tile is continuously subjected to the high-temperature flue gas scouring at the same position in the furnace, and is prone to deformation and falling off, and the long-time running of the welding point will cause cracks and falling off, thereby causing the pipe explosion. UTILITY MODEL CONTENTS

[0005] The utility model discloses in order to solve the technical problem that the anti-abrasion tile of prior art is tightly attached to the reheating pipe, the anti-abrasion tile is continuously subjected to the high-temperature flue gas scouring at the same position in the furnace, and is prone to deformation and falling off, and further provides a reheater anti-abrasion device.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a reheater anti-abrasion device, which comprises: a reheater shell, the bottom side wall and the top wall of the reheater shell are respectively communicated with a smoke injection pipe and a smoke exhaust pipe, a steam pipe is connected to the upper part in the reheater shell, the steam pipe is located outside the reheater shell at both ends, each column of steam pipes is provided with a corresponding anti-abrasion rotating shaft at the lower part, the anti-abrasion rotating shaft is rotatably connected in the reheater shell, the anti-abrasion rotating shaft axis and the upper steam pipe axis are located in the same vertical plane, a fan blade is connected to the anti-abrasion rotating shaft in the reheater shell, a driving mechanism can drive the anti-abrasion rotating shaft to rotate, and the driving mechanism is connected to the anti-abrasion rotating shaft.

[0007] Preferably, the driving mechanism comprises a gear, each anti-abrasion rotating shaft is connected with a gear, the adjacent gears are meshed with each other, and one anti-abrasion rotating shaft is connected with a power source.

[0008] Preferably, the driving mechanism comprises a V-shaped plate, the inner wall of the reheater shell at the lower part of the anti-abrasion rotating shaft is connected with a V-shaped plate, and the two end lines of the V-shaped plate are respectively located in the same vertical plane with the axes of the two adjacent anti-abrasion rotating shafts.

[0009] Preferably, a plurality of guide plates are connected to the inner bottom wall of the reheater shell, and each of the guide plates is located at the injection pipe and scattered at different angles.

[0010] Compared with the prior art, the reheater has the advantages that:

[0011] 1. The particles and dust in the high-temperature flue gas are directly irradiated to the anti-wear shaft and the fan blade from bottom to top, the driving mechanism drives the anti-wear shaft and the fan blade to rotate, so that the contact points of the particles and the anti-wear shaft and the fan blade continuously change, and the problem of deformation and falling of the same position of the anti-wear tile due to continuous high-temperature flue gas washing in the prior art is avoided.

[0012] 2. The particles and dust enter the first inner direct guide plate of the reheater shell, and under the buffering and friction of the guide plate, part of the particles fall to the bottom of the reheater shell, the flue gas is guided by the guide plate to be uniformly distributed in the lower part and then rises, so that all the steam pipes are uniformly heated by the uniformly distributed flue gas, and the problem of poor reheating effect caused by uneven distribution of flue gas is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 The figure is a structural schematic diagram of the reheater;

[0014] Fig. 2 The figure is a structural sectional schematic diagram of the reheater.

[0015] In the figure: reheater shell 1; injection pipe 2; exhaust pipe 3; steam pipe 4; anti-wear shaft 5; fan blade 6; driving mechanism 7; gear 71a; V-shaped plate 71b; guide plate 8. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0017] The rotary connection in the device refers to the rotary connection achieved by baking the bearing on the shaft, the shaft or the shaft hole being provided with a spring retainer groove, and the elastic retainer being clamped in the retainer groove to achieve axial fixation of the bearing.

[0018] The present application will be described in detail below with reference to the drawings. EMBODIMENT

[0019] The present application will be described in detail below with reference to the drawings. Figs. 1-2The embodiment illustrates a reheater anti-abrasion device, which comprises a reheater shell 1, a smoke injection pipe 2 and a smoke exhaust pipe 3 communicated with the bottom side wall and the top wall of the reheater shell 1 respectively, a steam pipe 4 connected to the upper part of the reheater shell 1, corresponding anti-abrasion rotating shafts 5 arranged below each column of the steam pipe 4, the anti-abrasion rotating shafts 5 rotatably connected to the reheater shell 1, the axis of the anti-abrasion rotating shaft 5 and the axis of the upper steam pipe 4 located in the same vertical plane, a fan blade 6 connected to the anti-abrasion rotating shaft 5 in the reheater shell 1, and a driving mechanism 7 capable of driving the anti-abrasion rotating shaft 5 to rotate and connected to the anti-abrasion rotating shaft 5.

[0020] High-temperature flue gas is injected into the reheater shell 1 through the smoke injection pipe 2, and the particles and dust in the high-temperature flue gas are directly irradiated to the anti-abrasion rotating shaft 5 and the fan blade 6 from bottom to top. Each column of the steam pipe 4 is arranged below the corresponding anti-abrasion rotating shaft 5, the smoke directly irradiated to the steam pipe 4 is blocked and cannot cause fly ash abrasion, the driving mechanism 7 drives the anti-abrasion rotating shaft 5 and the fan blade 6 to rotate, so that the contact points of the particles and dust with the anti-abrasion rotating shaft 5 and the fan blade 6 continuously change, thereby avoiding the problems that the same position of the anti-abrasion protection tile in the prior art is deformed and falls off due to continuous high-temperature flue gas washing, and the flue gas heat is conducted to the steam through the steam pipe 4 to complete steam reheating.

[0021] The reheater shell 1 is connected with a plurality of guide plates 8, one end of each guide plate 8 is located at the smoke injection pipe 2 and is scattered and arranged at different angles.

[0022] The particles and dust enter the reheater shell 1 and are directly irradiated to the guide plate 8, under the buffering and friction of the guide plate 8, part of the particles fall to the bottom of the reheater shell 1, the flue gas is guided by the guide plate 8 and uniformly distributed in the lower part of the reheater shell 1 and then rises, so that all the steam pipes are uniformly heated by the uniformly distributed flue gas, and the problem that the reheating effect is poor due to uneven distribution of the flue gas is avoided. Embodiment

[0023] The following will be described in combination with the accompanying drawings Figs. 1-2 On the basis of the first embodiment, the embodiment illustrates a reheater anti-abrasion device, the driving mechanism 7 comprises a gear 71a, each anti-abrasion rotating shaft 5 is connected with the gear 71a, the adjacent gears 71a are engaged with each other, and one anti-abrasion rotating shaft 5 is connected with a power source.

[0024] The power source is input by one anti-abrasion rotating shaft 5, all the anti-abrasion rotating shafts 5 are driven to rotate synchronously through the gears 71a, and the driving is completed. Embodiment

[0025] The following will be described in combination with the accompanying drawings Figs. 1-2On the basis of the first embodiment, the re-heater anti-abrasion device is described, the driving mechanism 7 comprises a V-shaped plate 71b, the V-shaped plate 71b is connected to the inner wall of the lower part of the re-heater shell 1 of the anti-abrasion rotating shaft 5, and the two end lines of the V-shaped plate 71b are respectively located in the same vertical plane with the axis of the two adjacent anti-abrasion rotating shafts 5.

[0026] The V-shaped plate 71b shields half of the fan blades 6 of the two upper anti-abrasion rotating shafts 5, under the guidance of the V-shaped plate 71b, the flue gas directly strikes the other half of the fan blades 6 of the anti-abrasion rotating shaft 5 and drives the anti-abrasion rotating shaft 5 to rotate, and the driving is completed without external power driving.

[0027] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0028] The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, and the mechanical parts and equipment adopt the conventional types in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0029] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A reheat anti-wear device comprising: The reheater shell (1) is provided with a smoke injection pipe (2) and a smoke exhaust pipe (3) communicated with the bottom sidewall and the top wall of the reheater shell (1) respectively, and a steam pipe (4) is connected to the upper part of the reheater shell (1), Characterized in that: each column of steam pipes (4) is provided with a corresponding anti-wear rotating shaft (5) at the lower part, the anti-wear rotating shaft (5) is rotatably connected to the reheater shell (1), the axis of the anti-wear rotating shaft (5) and the axis of the upper steam pipe (4) are located in the same vertical plane, a fan blade (6) is connected to the anti-wear rotating shaft (5) in the reheater shell (1), a driving mechanism (7) can drive the anti-wear rotating shaft (5) to rotate, and the driving mechanism (7) is connected to the anti-wear rotating shaft (5).

2. A reheat anti-wear device according to claim 1, characterised in that: The driving mechanism (7) comprises a gear (71a), each anti-wear rotating shaft (5) is provided with a gear (71a), adjacent gears (71a) are meshed with each other, and one anti-wear rotating shaft (5) is connected with a power source.

3. A reheat anti-wear device according to claim 1, characterised in that: The driving mechanism (7) comprises a V-shaped plate (71b), the inner wall of the reheater shell (1) at the lower part of the anti-wear rotating shaft (5) is connected with the V-shaped plate (71b), and the two end lines of the V-shaped plate (71b) are respectively located in the same vertical plane with the axes of the two adjacent anti-wear rotating shafts (5).

4. A reheat anti-wear device according to any one of claims 1 to 3, characterised in that: The inner bottom wall of the reheater shell (1) is connected with a plurality of guide plates (8), one end of each guide plate (8) is located at the smoke injection pipe (2) and is scattered and arranged at different angles.

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