CN215723296U - Wear-proof device for boiler flue heating surface - Google Patents

Abstract

The utility model discloses an anti-abrasion device for a heating surface of a boiler flue, which comprises a mounting plate, a guide plate and an anti-abrasion plate, wherein the mounting plate is detachably connected with the inner wall of a vertical shaft flue close to one side of an elbow of a serpentine tube bank through a connecting piece, the bottom end of the mounting plate is fixedly provided with the guide plate with the bottom end inclined downwards, the bottom end of the guide plate is fixedly provided with the horizontally arranged anti-abrasion plate, the anti-abrasion plate covers the top end of the elbow of the serpentine tube bank, the bottom end surface of the anti-abrasion plate is provided with a plurality of through grooves which are in one-to-one correspondence with and movably contact with tube bodies of the serpentine tube bank, and the through grooves are arranged along the length direction of the tube bodies of the serpentine tube bank. The advantages are that: the mounting plate is arranged on the vertical shaft flue, and under the matching action of the guide plate and the wear-resistant plate, the problems of generation of a flue gas corridor and flue gas leakage are solved, the inner wall of the vertical shaft flue and the elbow of the serpentine tube bank are protected, and the heat exchange equipment can normally run; the flue gas is guided to the serpentine tube bank, so that the heat exchange effect of the heat exchange equipment is improved.

Description

Wear-proof device for boiler flue heating surface

The technical field is as follows:

the utility model relates to the technical field of boilers, in particular to an anti-abrasion device for a heating surface of a boiler flue.

Background art:

the temperature of flue gas in the shaft flue at the tail part of the boiler is higher, in order to avoid heat waste, serpentine tube rows of heat exchange equipment such as a low-temperature superheater, a low-temperature reheater and an economizer are arranged in the shaft flue, and because the flue gas in the shaft flue is a mixture of fly ash, flue gas, nitric acid, products and the like generated by combustion of the boiler, the flue gas has the characteristics of high flow speed and corrosivity, all heat exchange equipment is in the environment for a long time, powerful protective measures are needed, and safe and stable operation of the equipment is ensured.

At present, an anti-abrasion cover plate is fixedly arranged at the top end of a serpentine tube bank, and in the using process, the serpentine tube bank can extend along the length direction of a vertical shaft flue due to heating and shrink along the width direction of the vertical shaft flue, namely a flue gas corridor can be generated between the elbow part of the serpentine tube bank and the inner wall of the vertical shaft flue, a large amount of flue gas leaks from the flue gas corridor, and the heat exchange effect of the serpentine tube bank is influenced; the concentration of the leaked flue gas fly ash is increased, so that the refractory material on the inner wall of a vertical shaft flue is also caused to fall off, the protected heated surface pipe receives the front impact of the flue gas, the elbow of the snakelike pipe bank is abraded and corroded, the erosion is serious, when the heated surface is abraded and corroded to generate a leakage point, the whole unit needs to be shut down to eliminate the defect of the leakage point, the safe and stable operation of production is greatly influenced, the abnormal shutdown of heat exchange equipment is indirectly influenced, and the economic loss is extremely high; the prior anti-abrasion device is fixed on the snakelike tube row, because the internal environment of the vertical shaft flue is complex, when the anti-abrasion device is damaged, auxiliary tools such as a welding machine and a plasma cutting machine are needed, and a welder who holds high-pressure welding quality still needs to weld, so that the disassembly and the assembly are inconvenient, and the auxiliary tools can also collide with corresponding heat exchange equipment to cause damage.

The prior art can not form effective water conservancy diversion to the flue gas in order to reach the effect that the prevention receives the wearing and tearing of hot face pipe, and the maintenance work is complicated, the period is long.

The utility model has the following contents:

the utility model aims to provide an anti-abrasion device for a heating surface of a boiler flue.

The utility model is implemented by the following technical scheme: boiler flue receives hot side wear proof device, it is including mounting panel, deflector, wear plate, the mounting panel passes through the connecting piece and can dismantle with the inner wall of the shaft flue that is close to elbow one side of snakelike bank of tubes and be connected, the bottom mounting of mounting panel has the bottom downward sloping to set up the deflector, the bottom mounting of deflector has the level to set up the wear plate, the wear plate lid is established the elbow top of snakelike bank of tubes, set up on the bottom terminal surface of wear plate a plurality of with the body one-to-one of snakelike bank of tubes and the logical groove of swing joint, it follows to lead to the groove the body length direction of snakelike bank of tubes sets up.

Further, the connecting piece includes spout, direction slider, the mounting panel is close to the vertical bottom of the inner wall one side of shaft flue has been seted up the spout, be fixed with on the inner wall of shaft flue with the spout assorted direction slider, direction slider with spout sliding connection.

Furthermore, the cross section of the guide sliding block is T-shaped.

Furthermore, a groove which is horizontally arranged is formed in the mounting plate above the sliding groove, and a sealing gasket is fixed in the groove.

Furthermore, a hanging ring is fixed at the top end of the mounting plate.

The utility model has the advantages that: the device has the advantages of simple structure, low cost, convenient operation and strong applicability; the mounting plate is arranged on the vertical shaft flue, and under the matching action of the guide plate and the wear-resistant plate, the problems of generation of a flue gas corridor and flue gas leakage are solved, the inner wall of the vertical shaft flue and the elbow of the serpentine tube bank are protected, and the heat exchange equipment can normally run; the flue gas is guided to the serpentine tube bank, so that the heat exchange effect of the heat exchange equipment is improved; the problem that the existing wear-resistant device displaces along with the expansion of the snakelike tube bank is solved; the fixed purpose of the device is reached in the same direction as the spout by the direction slider, under the cooperation of spout and direction slider, more makes things convenient for the dismouting work of the device in the shaft flue, has saved the manpower, and later stage maintenance is very convenient, need not with the help of auxiliary assembly, and the personnel that need not to have high-pressure welding qualification weld, can accomplish the maintenance operation of the device by the engineering staff, reduce the cost of overhaul greatly, shorten the repair time.

Description of the drawings:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of the utility model;

FIG. 2 is a plan view showing the combination of the slide groove and the guide slider;

FIG. 3 is a side view of the wear plate;

in the figure: the device comprises a mounting plate 1, a guide plate 2, an anti-abrasion plate 3, a connecting piece 4, a sliding chute 41, a guide sliding block 42, a vertical shaft flue 5, a snakelike tube bank 6, a through groove 7, a groove 8, a sealing gasket 9, a hanging ring 10 and an elbow 11.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, the anti-wear device for the heating surface of the boiler flue comprises a mounting plate 1, a guide plate 2 and an anti-wear plate 3, wherein the mounting plate 1 is detachably connected with the inner wall of a shaft flue 5 close to one side of an elbow 11 of a serpentine tube row 6 through a connecting piece 4, the bottom end of the mounting plate 1 is fixed with the guide plate 2 with the bottom end inclined downwards, the bottom end of the guide plate 2 is fixed with the horizontally arranged anti-wear plate 3, the serpentine tube row 6 is movably contacted with the anti-wear plate 3, the anti-wear plate 3 covers the top end of the elbow 11 of the serpentine tube row 6, the bottom end surface of the anti-wear plate 3 is provided with a plurality of through grooves 7 which are in one-to-one correspondence and movable contact with the tube bodies of the serpentine tube row 6, the through grooves 7 are arranged along the length direction of the tube row 6, under the matching action of the mounting plate 1, the guide plate 2 and the anti-wear plate 3, the serpentine tube row 6 is heated to expand upwards, the tube bodies of the serpentine tube row 6 are in one-to-pass through grooves 7 of the anti-wear plate 3, the gap between the wear-resistant plate 3 and the serpentine tube row 6 is small, so that the problem of leakage of flue gas from the space between the wear-resistant plate 3 and the serpentine tube row 6 is solved, meanwhile, the mounting plate 1 is mounted on the vertical shaft flue 5, the problems of flue gas corridor generation and flue gas leakage are solved through the action of the guide plate 2, the inner wall of the vertical shaft flue 5 and the elbow 11 of the serpentine tube row 6 are protected, and the heat exchange equipment can normally run; the flue gas is guided to the serpentine tube bank 6, so that the heat exchange effect of the heat exchange equipment is improved; the problem that the existing wear-proof device is displaced along with the expansion of the serpentine tube row 6 is solved.

The connecting piece 4 comprises a sliding groove 41 and a guide sliding block 42, the sliding groove 41 is vertically formed in the bottom end of one side, close to the inner wall of the vertical shaft flue 5, of the mounting plate 1, the guide sliding block 42 matched with the sliding groove 41 is fixed on the inner wall of the vertical shaft flue 5, the cross section of the guide sliding block 42 is in a T shape, the guide sliding block 42 is in sliding connection with the sliding groove 41, the guide sliding block 42 enters the sliding groove 41 in a following mode to achieve the fixing purpose of the device, the dismounting work of the device in the vertical shaft flue 5 is facilitated under the matching of the sliding groove 41 and the guide sliding block 42, manpower is saved, later-stage maintenance is very convenient, auxiliary equipment is not needed, welding of personnel with high-pressure welding quality is not needed, maintenance operation of the anti-abrasion device can be completed by a small machine worker, maintenance cost is greatly reduced, and maintenance time is shortened.

The top of mounting panel 1 is fixed with rings 10, when needing to overhaul the device, promotes mounting panel 1 along shaft flue 5 upwards under the cooperation of spout 41 and guide slider 42 through rings 10, breaks away from completely with spout 41 up to guide slider 42, has solved the device and has strikeed snakelike bank of tubes 6's problem when dismantling.

A groove 8 which is horizontally arranged is formed in the mounting plate 1 above the sliding groove 41, a sealing gasket 9 is fixed in the groove 8, and the sealing gasket 9 seals between the mounting plate 1 and the vertical shaft flue 5.

The specific operation process of the embodiment is as follows:

install mounting panel 1 in shaft flue 5 through spout 41 and guide slider 42's mating reaction, in-process inflation at the heat transfer of snakelike bank of tubes and the logical groove 7 sliding contact on the wear plate 3, wear plate 3 protects snakelike bank of tubes 6, simultaneously under the effect of deflector 2, carry out the water conservancy diversion to the flue gas of the inner wall of impact shaft flue 5, heat transfer equipment's heat transfer effect has been increased, regularly overhaul the device, when needing to be changed, hang the device through the haulage rope and locate shaft flue 5.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (5)

1. The anti-abrasion device for the heating surface of the boiler flue is characterized by comprising a mounting plate, a guide plate and an anti-abrasion plate, wherein the mounting plate is detachably connected with the inner wall of a shaft flue close to one side of an elbow of a serpentine tube bank through a connecting piece, the bottom end of the mounting plate is fixedly provided with the guide plate with a bottom end inclined downwards, the bottom end of the guide plate is fixedly provided with the anti-abrasion plate horizontally arranged, the anti-abrasion plate covers the top end of the elbow of the serpentine tube bank, a plurality of through grooves which are in one-to-one correspondence with the tubes of the serpentine tube bank and are in movable contact with the tubes of the serpentine tube bank are formed in the bottom end face of the anti-abrasion plate, and the through grooves are formed in the length direction of the tubes of the serpentine tube bank.

2. The wear prevention device for the heating surface of the boiler flue according to claim 1, wherein the connecting piece comprises a sliding groove and a guiding sliding block, the sliding groove is vertically formed in the bottom end of one side of the mounting plate, which is close to the inner wall of the shaft flue, the guiding sliding block matched with the sliding groove is fixed on the inner wall of the shaft flue, and the guiding sliding block is slidably connected with the sliding groove.

3. The wear prevention device for the heating surface of the boiler flue of claim 2, wherein the cross section of the guide slide block is T-shaped.

4. The wear prevention device for the heating surface of the boiler flue according to claim 2, wherein a groove is horizontally formed in the mounting plate above the chute, and a sealing gasket is fixed in the groove.

5. The wear prevention device for the heating surface of the boiler flue according to any one of claims 1 to 4, wherein a hanging ring is fixed to the top end of the mounting plate.

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