CN216897275U

CN216897275U - Strengthened side-wearing-resistant alloy plate suitable for CFB boiler

Info

Publication number: CN216897275U
Application number: CN202220165912.4U
Authority: CN
Inventors: 刘骥翔; 刘上中; 王建新
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-07-05
Anticipated expiration: 2032-01-21

Abstract

The utility model discloses a reinforced side-wearing-resistant alloy plate suitable for a CFB boiler, which comprises an anti-wear vertical plate fixedly arranged on a water-cooled wall fin, a guide plate hinged with the top of the anti-wear vertical plate through a rotating shaft, and angle adjusting rods symmetrically arranged on the front end surface and the rear end surface of the anti-wear vertical plate respectively; the guide plate is driven by the impact air flow to rotate through the rotating shaft, the leeward side is switched into the windward side in time, the included angle between the windward side of the guide plate and the impact air flow can be adjusted while the guide plate is supported through the angle adjusting rod, the flow speed of the impact air flow is effectively reduced, the generation of vortex air flow can be effectively reduced, and the abrasion of the water-cooled wall caused by the sinking of smoke and ash carried by the vortex air flow is avoided; the anti-abrasion vertical plate is also provided with a bottom air outlet, so that the blocking effect of the anti-abrasion vertical plate on airflow can be reduced, the heat exchange area is increased, and the over-temperature phenomenon is avoided; the front end surface and the rear end surface of the guide plate are respectively provided with a front end surface guide groove and a rear end surface guide groove which can guide impact airflow to stably pass through so as to eliminate vortex airflow.

Description

Strengthened side-wearing-resistant alloy plate suitable for CFB boiler

Technical Field

The embodiment of the utility model belongs to the technical field of circulating fluidized bed boilers, and particularly relates to a reinforced side-wearing-resistant alloy plate suitable for a CFB (circulating fluid bed) boiler.

Background

The circulating fluidized bed boiler can burn various types of coal, has high combustion efficiency, good unit load adjustability and less pollutant emission, but has serious wear problem of the pipe wall of a heating surface, and the serious wear problem of the heating surface can influence the safe and economic operation of the unit.

The water-cooled wall is used as the most important heating surface in the CFB boiler, and the abrasion problem of the water-cooled wall directly influences the safety, stability and economy of the whole circulating fluidized bed boiler unit. With the development of an anti-abrasion technology, more active anti-abrasion grid anti-abrasion technologies are selected for the existing unit to replace the traditional passive anti-abrasion technologies such as anti-abrasion beams, castable and metal spraying.

In the application process of the grid abrasion-proof technology, due to the fact that working conditions in a hearth are complex, flow field conditions of all regions are different, the single-form alloy abrasion-proof plate cannot enable abrasion-proof of each region to achieve the best effect, particularly, the single-form alloy abrasion-proof plate is located in a region near an outlet of a smoke window of a circulating fluidized bed boiler, the outlet of the region is narrow and small, the airflow velocity is high, radial airflow and axial airflow at the outlet are converged to easily form vortex airflow, and the disordered impact force of the smoke and ash on a water wall pipe near the region under the driving of the vortex airflow is strong. Under the current alloy abrasionproof riser condition of loading, the interference ability to vortex air current is limited, and vortex air current still can drive flue gas, lime-ash and sink and cause to erode the water-cooling wall, leads to local abrasionproof inefficacy, and the water-cooling wall pipe produces the attenuate, reveals the problem of tube explosion even for stability, security, the economic nature of boiler operation receive the threat.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical scheme, aiming at the problems that the existing alloy wear-resistant plate has limited interference capability on vortex air flow and cannot prevent the vortex air flow from carrying smoke and ash to sink and scour a water-cooled wall to cause damage to the vortex air flow.

In order to achieve the above object, the present invention provides a reinforced side wear alloy plate for a CFB boiler, comprising: the anti-abrasion vertical plate is fixedly arranged on the water-cooled wall fin; the guide plate is rotatably arranged at the top of the anti-abrasion vertical plate; the included angle between the guide plate and the impact airflow ranges from 120 degrees to 150 degrees.

Further, abrasionproof riser top is equipped with the pivot, the guide plate realizes articulatedly through pivot and abrasionproof riser.

Furthermore, the front end face and the rear end face of the anti-abrasion vertical plate are symmetrically provided with angle adjusting rods respectively, and each angle adjusting rod comprises a main adjusting rod, an auxiliary adjusting rod and a positioning pin, wherein the auxiliary adjusting rod is slidably sleeved on the main adjusting rod.

Furthermore, the middle of the bottom of the anti-abrasion vertical plate is provided with a protruding part, and a plurality of welding grooves are formed in the protruding part.

Furthermore, bottom air outlets are formed in two sides of the protruding portion.

Furthermore, a front end surface diversion trench and a rear end surface diversion trench are respectively arranged on the front end surface and the rear end surface of the diversion plate.

Furthermore, the guide plate is made of wear-resistant, high-temperature-resistant, light-weight and high-strength alloy.

In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:

(1) the reinforced side-wearing-resistant alloy plate suitable for the CFB boiler is provided with the wear-resistant vertical plate and the guide plate, the windward side of the guide plate can adjust the included angle between the guide plate and the wear-resistant vertical plate according to the impact airflow, the flow velocity of the impact airflow is reduced, the generation of vortex airflow can be effectively reduced, the abrasion of flue gas and ash carried by the guide plate on a water-cooling wall caused by the sinking of the flue gas and the ash is avoided, the reduction of the radiation heat exchange area of the water-cooling wall caused by the sinking and accumulation of solid particles in the airflow is avoided while the abrasion is reduced, the overtemperature phenomenon at the positions of a cyclone separator, a U-shaped material returning device, a vertical pipe, an air outlet and the like is reduced, and the deep peak regulation of the boiler is facilitated.

(2) The reinforced side-wearing-resistant alloy plate suitable for the CFB boiler is provided with the rotating shaft to realize the hinge joint of the guide plate and the wear-resistant vertical plate, so that the guide plate can rotate around the rotating shaft; the guide plate is supported by the angle adjusting rod, and meanwhile, the included angle between the anti-abrasion vertical plate and the guide plate can be changed by adjusting the length of the angle adjusting rod, the adjusting method is simple, convenient and quick, the guide plate can automatically adjust the included angle between the guide plate and the anti-abrasion vertical plate under the driving of the impact air flow, the leeward side can be switched to the windward side in time, the impact air flow is slowed down, the condition that the water cooling wall is damaged due to the fact that smoke and ash which impact the leeward side rebound downwards to the water cooling wall to erode the water cooling wall under the condition that the vortex air flow is in disordered impact can be effectively avoided, and the angle of the leeward side of the guide plate can not be adjusted due to fixation.

(3) According to the reinforced side-wearing-resistant alloy plate suitable for the CFB boiler, the bottom air outlets are formed in the two sides of the protruding portion, so that the effect of the anti-wearing vertical plate on blocking airflow can be reduced, the generation of vortex airflow is reduced, meanwhile, hot airflow can penetrate through the bottom air outlets to exchange heat with the water-cooled wall, the heat exchange area is effectively increased, and the over-temperature phenomenon is avoided.

(4) According to the reinforced side-wearing-resistant alloy plate suitable for the CFB boiler, the front end surface guide groove and the rear end surface guide groove are respectively arranged on the front end surface and the rear end surface of the guide plate, when the front end surface or the rear end surface of the guide plate 2 serves as a windward surface, the guide grooves can guide impact airflow to stably pass through, so that vortex airflow is eliminated, and meanwhile, solid particles in the airflow are prevented from being accumulated.

Drawings

FIG. 1 is a front view and a side view of a reinforced side wear alloy plate in accordance with a first embodiment of the present invention;

FIG. 2 is a front view of a reinforced side wear alloy plate in accordance with a second embodiment of the present invention;

FIG. 3 is a side view of a reinforced side wear alloy plate in accordance with a second embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a baffle in an embodiment of the utility model;

FIG. 5 is a schematic view of the layout of the strengthened anti-side-wear alloy plate according to the embodiment of the present invention.

In all the figures, the same reference numerals denote the same features, in particular: 1-an anti-wear vertical plate, 11-a bottom air guide port, 2-a guide plate, 21-a front end surface guide groove, 22-a rear end surface guide groove, 3-a rotating shaft, 4-a protruding part, 41-a welding groove, 5-an angle adjusting rod, 51-a main adjusting rod, 52-an auxiliary adjusting rod, 53-a positioning pin and 6-a water-cooling wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-5, the utility model provides a reinforced side-wear-resistant alloy plate suitable for a CFB boiler, which comprises an anti-wear vertical plate 1 fixedly arranged on a fin of a water-cooled wall 6, and a guide plate 2 arranged on the top of the anti-wear vertical plate 1, wherein the degree of an included angle between the guide plate 2 and the anti-wear vertical plate 1 can be adjusted according to the direction and the size of an impact airflow, so that the included angle between the windward side of the guide plate 2 and the impact airflow is larger than 90 degrees, the flow velocity of the impact airflow is reduced, the generation of vortex airflow can be effectively reduced, the abrasion of smoke and ash carried by the vortex airflow to the water-cooled wall 6 is avoided, meanwhile, the reduction of the radiation heat exchange area of the water-cooled wall 6 caused by the sinking and accumulation of solid particles in the airflow is avoided, the overtemperature phenomena at the positions of a cyclone separator, a U-shaped material returning device, a vertical pipe, an air outlet and the like are reduced, and the deep peak shaving of the boiler is facilitated.

In a first embodiment of the present invention, as shown in fig. 1, the reinforced side-wear-resistant alloy plate includes an anti-wear riser 1 and a deflector 2, wherein a protrusion 4 is disposed in the middle of the bottom of the anti-wear riser 1, and a plurality of welding grooves 41 are disposed thereon, so that the anti-wear riser 1 can be connected with fins of a water wall 6 by welding and fixing; the protruding portion 4 both sides are equipped with bottom air outlet 11, and it can reduce the abrasionproof riser 1 and block the effect to the air current, reduces the production of vortex air current, forms grid wear-resistant plate group behind a plurality of adjacent reinforcement side-wearing-resistant alloy plate overlap joints simultaneously, and the hot gas flow can pass from bottom air outlet 11 and carry out the heat exchange with water-cooling wall 6, has effectively increased heat transfer area, avoids the emergence of overtemperature prote phenomenon. The anti-abrasion vertical plate 1 top is located in the slope of guide plate 2, and the contained angle between the two can be adjusted according to the air current size, makes the windward side of guide plate 2 and the contained angle of impact air current be greater than 90, and the contained angle can be adjusted according to the air current size at 120 ~ 150 within range, through being equipped with guide plate 2, can slow down the velocity of flow of impact air current, can effectively reduce the production of vortex air current.

As shown in fig. 2-3, in the second embodiment of the present invention, the deflector 2 is rotatably disposed on the top of the wear-resistant vertical plate 1, and is made of wear-resistant high-temperature-resistant alloy, so that the weight is light, the strength is high, the windward side of the deflector can be automatically adjusted according to the received impact airflow, the impact airflow is slowed down, the vortex airflow is eliminated, and when the vortex airflow moves to the leeward side of the deflector 2, the flue gas and ash impact the leeward side of the deflector 2 and rebound to the water-cooled wall 6 to wash the water-cooled wall. The guide plate 2 and the anti-abrasion vertical plate 1 are hinged through a rotating shaft 3, so that the guide plate 2 can rotate around the rotating shaft 3 to change an included angle between the guide plate and the anti-abrasion vertical plate 1; further, the angle adjusting rods 5 are symmetrically arranged on the front end face and the rear end face of the anti-abrasion vertical plate 1 respectively, the guide plate 2 can be supported, and the included angle between the anti-abrasion vertical plate 1 and the guide plate 2 can be changed by adjusting the length of the angle adjusting rods 5. The angle adjusting rod 5 comprises a main adjusting rod 51 and an auxiliary adjusting rod 52 which is slidably sleeved on the main adjusting rod 51, a positioning hole is formed in the main adjusting rod 51, a positioning groove is formed in one side, corresponding to the positioning hole, of the auxiliary adjusting rod 52, and after the length adjustment is completed, the positioning pin 53 can penetrate through the positioning groove to be matched with the positioning hole, so that the auxiliary adjusting rod 52 is fixed. After the protruding parts 4 of the strengthened side-wearing-resistant alloy plate are welded and fixed on the fins of the water-cooled wall 6, the lengths of the angle adjusting rods 5 on the front end surface and the rear end surface of the wear-resistant vertical plate 1 can be respectively adjusted according to the air flow strength, the adjusting method is simple, convenient and quick, the guide plate 2 is driven by the impact air flow to automatically adjust the included angle between the guide plate 2 and the wear-resistant vertical plate 1, the leeward side can be timely switched into the windward side, the impact air flow is slowed down, and the condition that the water-cooled wall 6 is damaged due to the fact that the leeward side of the guide plate 2 cannot adjust the angle because the leeward side is fixed under the disordered impact of the vortex air flow can be effectively avoided, and smoke and ash impacting the leeward side rebound downwards onto the water-cooled wall 6 to cause scouring on the water-cooled wall 6.

As shown in fig. 4, in the preferred embodiment of the present invention, the front end surface and the rear end surface of the baffle 2 are respectively provided with a front end surface baffle groove 21 and a rear end surface baffle groove 22, when the front end surface or the rear end surface of the baffle 2 is used as a windward surface, the baffle grooves 22 can guide the impact air flow to smoothly pass through, so as to eliminate the vortex air flow and simultaneously avoid the accumulation of solid particles in the air flow.

The reinforced side-wearing-resistant alloy plate suitable for the CFB boiler is simple in structure, low in cost and easy to install, can conveniently adjust the included angle between the windward surface of the guide plate 2 and the wear-resistant vertical plate 1, slows down the flow velocity of disordered impact air flow, can effectively reduce the generation of vortex air flow, and avoids the abrasion of the water-cooled wall 6 caused by the sinking of smoke and ash carried by the vortex air flow.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A reinforced side-wear alloy panel for a CFB boiler, comprising:

an anti-abrasion vertical plate (1) fixedly arranged on a fin of the water wall (6);

the guide plate (2) is rotatably arranged at the top of the anti-abrasion vertical plate (1);

the included angle between the guide plate (2) and the impact air flow ranges from 120 degrees to 150 degrees.

2. The reinforced side-wearing-resistant alloy plate suitable for the CFB boiler according to claim 1, wherein the wear-resistant riser (1) is provided with a rotating shaft (3) at the top, and the deflector (2) is hinged with the wear-resistant riser (1) through the rotating shaft (3).

3. The reinforced side-wearing-resistant alloy plate for the CFB boiler of claim 2, wherein the wear-resistant riser (1) is symmetrically provided with angle adjusting rods (5) on the front end surface and the rear end surface respectively, and the angle adjusting rods comprise main adjusting rods (51), auxiliary adjusting rods (52) slidably sleeved on the rows of the main adjusting rods (51) and positioning pins (53).

4. The reinforced side-wear alloy plate for CFB boilers as claimed in any one of claims 1-3, wherein the wear riser (1) has a protrusion (4) in the middle of the bottom, on which a plurality of welding grooves (41) are provided.

5. The reinforced side-wear alloy plate for CFB boilers as claimed in any one of claims 1-3, wherein the bottom of the wear riser (1) is provided with a bottom air outlet (11).

6. The enhanced side wear alloy plate for CFB boiler according to any of claims 1-3, wherein the front and rear end surfaces of the deflector (2) are provided with front end surface channels (21) and rear end surface channels (22), respectively.

7. The enhanced side wear alloy plate for CFB boiler according to any of claims 1-3, wherein the deflector (2) is made of wear resistant, high temperature resistant, light weight and high strength alloy.