CN210463082U - Ash bucket water-cooled wall and tower boiler - Google Patents

Abstract

The utility model provides an ash bucket water-cooling wall and tower boiler, wherein, the ash bucket water-cooling wall includes: a water wall body; the spiral water-cooling pipe is arranged on the outer surface of the water-cooling wall body; the anti-abrasion strip comprises a plurality of anti-abrasion strips, the anti-abrasion strips are arranged on the inner surface of the water wall body, each anti-abrasion strip comprises an anti-abrasion spraying layer and an anti-abrasion plastic material layer, and the anti-abrasion spraying layers are partially overlapped with the anti-abrasion plastic material layers. Through the technical scheme that this application provided, can rationally adjust ash bucket water wall lime-ash flow direction and concentrate the problem, effectively solve ash bucket water wall pipe wear rate height, easy coking, the big scheduling problem of ash volume.

Description

Ash bucket water-cooled wall and tower boiler

Technical Field

The utility model relates to a tower boiler particularly, relates to an ash bucket water-cooled wall and tower boiler.

Background

CN106152102A discloses a tower boiler capable of reducing flue gas temperature deviation, which specifically comprises: an inward-folding flow guide structure is added at an upper outlet of the rear wall of the existing tower boiler, namely, the position of the rear wall of a hearth, which is close to a horizontal flue, deflects to a certain angle in the boiler. The inward-folding flow guide structure enables the smoke distribution in the upper hearth heat exchanger area to be more uniform, the residence time of the smoke on the left side of the hearth in the furnace is also increased, and the smoke temperature deviation of the front side, the rear side, the left side and the right side of the hearth is effectively reduced; the inflected flow guide structure simultaneously prevents the flue gas in the upper hearth heat exchanger area from seriously deflecting towards the rear wall of the hearth, can reduce the abrasion of ash particles in the flue gas to the pipe wall of the heat exchanger near the rear wall, and is favorable for the safe operation of a unit.

The anti-abrasion structure of the ash bucket water-cooled wall in the prior art is shown in figures 1 and 2, the size of the cross section of a boiler furnace is 21230mm multiplied by 21230mm, the elevation of a lower header of the water-cooled wall is 7000mm, the elevation of the center of a furnace top tube is 105950mm, and the elevation of the top of a large plate girder is 83725 mm. The furnace water-cooled wall adopts the joint arrangement of a vertical tube panel and a spiral tube coil. The upper part of the furnace water-cooled wall is arranged into a vertical tube panel, and the middle lower part is arranged into a spiral section tube panel.

The specification of the boiler ash bucket water-cooled wall tube is phi 32 multiplied by 6.2mm, and the material is 15 CrMoG. The front wall and the rear wall are arranged between 7000 mm-21775 mm of elevation, and the left wall and the right wall are arranged between 7500-32156.2 mm of elevation. The deflection angle of the front and rear wall ash buckets is 55.0023 degrees, and the left and right wall ash buckets are vertically downward. The water cooling walls of the front and rear wall ash hoppers are divided into two parts, the spiral rising angle from bottom to top is changed from 60.8478 degrees to 23.8434 degrees, and the spiral rising angle of the water cooling walls of the left and right wall ash hoppers is 25.8721 degrees. The side of the front wall and the left wall is the angle #1, the side of the rear wall and the left wall is the angle #2, the side of the rear wall and the right wall is the angle #3, and the side of the front wall and the right wall is the angle # 4. The order of increasing numbers is the direction of rotation downwind. Angle #1 is shown in fig. 2, with 4 wear strips equally spaced and 4 equal in length.

Long-term tests show that the wall thickness abrasion of the water-cooled wall in the prior art is too large in the operation process, so that the safe and stable operation of the boiler is seriously influenced.

SUMMERY OF THE UTILITY MODEL

For solving the wearing and tearing problem of current spiral tube ring tower boiler ash bucket water-cooling wall, the utility model provides an ash bucket water-cooling wall and tower boiler.

According to the utility model discloses an aspect provides an ash bucket water-cooling wall, and wherein, ash bucket water-cooling wall includes: a water wall body; the spiral water-cooling pipe is arranged on the outer surface of the water-cooling wall body; many abrasionproof areas, many abrasionproof areas set up on the internal surface of water-cooling wall body, and every abrasionproof area includes abrasionproof spraying layer and abrasionproof plastic material layer, and abrasionproof spraying layer overlaps with abrasionproof plastic material layer part.

Furthermore, the anti-abrasion belt is provided with a chamfer on the windward side.

Further, the anti-abrasion belt further comprises bending nails, the bending nails are welded on the fins between the adjacent spiral water-cooling tubes, and the anti-abrasion plastic material layer is cast on the bending nails.

Further, the water-cooling wall body includes preceding wall back wall, left wall and right wall, and preceding wall and back wall set up relatively, and the interval of preceding wall inner wall and back wall inner wall is close to gradually from top to bottom, and left wall and right wall set up relatively, and the abrasionproof area is located preceding wall and/or back wall on.

Furthermore, a plurality of anti-abrasion belts are uniformly arranged on the front wall at intervals, and/or a plurality of anti-abrasion belts are uniformly arranged on the rear wall at intervals.

Further, the longest wear strip on the front wall is located at the joint edge of the front wall and the left wall, and/or the longest wear strip on the rear wall is located at the joint edge of the rear wall and the right wall.

Further, the multiple anti-abrasion belts on the front wall are sequentially lengthened from the windward side to the non-windward side, and/or the multiple anti-abrasion belts on the rear wall are sequentially lengthened from the windward side to the non-windward side.

Furthermore, the anti-abrasion spraying layer is positioned on the windward side of the anti-abrasion plastic material layer, and the part of the anti-abrasion plastic material layer covers the upper side of the anti-abrasion spraying layer.

Further, the chamfer ranges from 30 ° to 45 °.

According to the utility model discloses a on the other hand provides a tower boiler, and wherein, tower boiler includes the ash bucket water-cooling wall that the aforesaid provided.

Use the technical scheme of the utility model, this ash bucket water-cooling wall includes water-cooling wall body, spiral water-cooling pipe and many abrasionproof areas. Wherein, every abrasionproof area includes abrasionproof spraying layer and abrasionproof plastic material layer, and abrasionproof spraying layer overlaps with abrasionproof plastic material layer part and sets up, can improve the abrasionproof performance of abrasionproof area like this to be convenient for maintain and replace. The abrasion-proof belt is arranged on the inner surface of the water wall body, so that the problem of high abrasion rate of the ash bucket water wall pipe can be effectively solved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a partial schematic view of an ash hopper of a tower boiler according to the prior art;

FIG. 2 shows a schematic diagram of an ash bucket waterwall according to the prior art;

FIG. 3 shows a partial schematic view of an ash bucket waterwall according to an embodiment of the present invention;

FIG. 4 shows a schematic view of an anti-wear strip on an ash bucket water wall according to an embodiment of the present invention; and

fig. 5 shows a bottom cross-sectional view of the wear strip of fig. 4.

Wherein the figures include the following reference numerals:

10. a water wall body; 11. a front wall; 12. a left wall; 13. a rear wall; 14. a right wall; 20. a spiral water-cooled tube; 200. an anti-wear belt; 110. an anti-wear spray coating layer; 120. a layer of wear-resistant plastic material; 130. the nail lies prone.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 shows a partial schematic view of an ash hopper of a tower boiler according to the prior art. A front wall 11, a left wall 12, a rear wall 13 and a right wall 14 are shown. In factory practice, the front wall 11 and the left wall 12 are generally set to have a #1 corner on the side, the rear wall 13 and the left wall 12 are set to have a #2 corner, the rear wall 13 and the right wall 14 are set to have a #3 corner, and the front wall 11 and the right wall 14 are set to have a #4 corner. The order of increasing numbers is the direction of rotation downwind.

FIG. 2 shows a schematic of an ash bucket waterwall according to the prior art. A front wall 11 is shown, on which front wall 11 4 wear strips of equal length are arranged.

FIG. 3 shows a partial schematic view of an ash bucket waterwall according to an embodiment of the present invention. The specification of a water-cooling pipe of a boiler ash bucket water-cooling wall is phi 32 multiplied by 6.2mm, and the material is 15 CrMoG. The front wall and the rear wall which incline downwards are arranged between the elevation 7000mm to 21775mm, and the left wall and the right wall are arranged between the elevation 7500 mm to 32156.2 mm. The deflection angle of the front wall ash bucket and the rear wall ash bucket is 55.0023 degrees, and the left wall ash bucket and the right wall ash bucket are vertically downward. The water cooling walls of the front wall ash bucket and the rear wall ash bucket are divided into two parts, from bottom to top, the spiral rising angle of the water cooling pipes is changed from 60.8478 degrees to 23.8434 degrees, and the spiral rising angles of the water cooling walls of the left wall ash bucket and the right wall ash bucket are 25.8721 degrees. The spiral water-cooling pipe 20 is provided on the outer surface of the water-cooling wall body 10. A plurality of wear strips 200 are provided on the inner surface of the waterwall body 10. Each wear strip 200 comprises a layer of wear protection spray 110 and a layer of wear protection plastic material 120. Arrange 4 abrasionproof plastic material layers at wall 11's #1 angle in the front, the width on abrasionproof plastic material layer is 300mm, welds the nail of lying prone on the lower part water-cooling wall fin (the cross section width is no less than 4 nails of lying prone and guarantees to pour the firm on layer). The stomach spike 130 of the anti-wear strip is welded to the fin between adjacent spiral water cooled tubes 20 and the layer of anti-wear plastic material 120 is cast over the stomach spike 130. Through set up many abrasionproof belts 200 on the internal surface at water-cooled wall body 10, and many abrasionproof belts 200's width is 300mm, can avoid the coke breeze to hang in the ash bucket water-cooled wall to can avoid a large amount of coke breeze gathering in the ash bucket water-cooled wall, and then can not appear seriously leading to tower boiler stop work because of the coking.

The ash facing side of each anti-abrasion plastic material layer 120 is subjected to spraying treatment to arrange the anti-abrasion spraying layer 110, wherein the spraying width is not less than 300mm, and the ash flow from top to bottom is guided to flow along the ash facing side of the anti-abrasion plastic material layer 120.

The water-cooled wall body 10 of the ash bucket water-cooled wall comprises a front wall 11, a rear wall 13, a left wall 12 and a right wall 14, wherein the front wall 11 and the rear wall 13 are arranged oppositely, the distance between the inner wall of the front wall 11 and the inner wall of the rear wall 13 is gradually close from top to bottom, and the left wall 12 and the right wall 14 are arranged oppositely. In which the inclined front and rear walls 11, 13 are subject to more severe wear during actual operation, and therefore in this embodiment, the wear strips 200 are provided on the front and/or rear walls 11, 13.

A plurality of wear strips 200 are provided at regular intervals on the front wall 11. And a plurality of wear strips 200 are provided at regular intervals on the rear wall 13. The longest wear strip on the front wall 11 is located at the juncture of the front wall 11 and the left wall 12 (#1 corner). While the longest wear strip on the rear wall 13 is located on the joint edge (#3 corner) of the rear wall 13 and the right wall 14.

The plurality of wear strips 200 on the front wall 11 or the rear wall 13 are lengthened in sequence from the windward side to the non-windward side in order to progressively resist wear from the ashes.

Fig. 4 shows a schematic view of an anti-wear structure on an ash bucket water wall according to an embodiment of the present invention, in which the anti-wear spray layer 110 is shown partially overlapping the anti-wear plastic material layer 120. The overlap is shown as 150mm, while the anti-wear spray layer 110 and the anti-wear plastic layer 120 are both 300 mm.

The anti-abrasion spray coating layer 110 is located on the windward side of the anti-abrasion plastic material layer 120, and a part of the anti-abrasion plastic material layer 120 covers the upper side of the anti-abrasion spray coating layer 110, so that a structure that the anti-abrasion spray coating layer 110 is located below and the anti-abrasion plastic material layer 120 is located above the anti-abrasion spray coating layer is formed.

Through setting up the abrasionproof area like this, can repair and maintain rapidly after the abrasionproof area appears wearing and tearing, guaranteed the up-stream time of boiler.

Figure 5 shows a bottom cross-sectional view of the wear structure of figure 4. Wherein the wear strip 200 is provided with a chamfer on the windward side. The chamfer ranges from 30 ° to 45 °. The angle shown in fig. 5 is 30 °, and may be any angle between 30 ° and 45 °. The inclination angle has a guiding effect on the rotation of the ash in the ash hopper.

The utility model discloses still relate to a tower boiler, this tower boiler includes the ash bucket water-cooling wall that above each embodiment described.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

firstly, the structure is simple and convenient for maintenance. The method mainly utilizes a method of combining an anti-abrasion spraying layer with a plastic partition, after construction is completed for the first time, the thickness of a wear-resistant layer of an ash bucket water-cooled wall needs to be measured and the plastic needs to be repaired in the later maintenance period.

Secondly, the overhaul period and the service life of the ash bucket water wall tube are prolonged. The abrasion of ash slag to the pipe wall is reduced by spraying an abrasion-proof layer on the ash facing side of the plastic material, and the replacement period of the plastic material and the spraying layer is more than 2 years.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An ash bucket water-cooled wall, characterized in that, ash bucket water-cooled wall includes:

a waterwall body (10);

the spiral water-cooling pipe (20) is arranged on the outer surface of the water-cooling wall body (10);

the anti-abrasion structure comprises a plurality of anti-abrasion belts (200), wherein the anti-abrasion belts (200) are arranged on the inner surface of the water wall body (10), each anti-abrasion belt (200) comprises an anti-abrasion spraying layer (110) and an anti-abrasion plastic material layer (120), and the anti-abrasion spraying layer (110) is partially overlapped with the anti-abrasion plastic material layer (120).

2. The ash bucket water wall of claim 1, wherein the wear strip (200) is chamfered on the windward side.

3. The ash bucket water wall of claim 1, wherein the wear strip (200) further comprises a hook over pin (130), the hook over pin (130) being welded to the fin between adjacent spiral water tubes (20), the wear resistant plastic material layer (120) being cast over the hook over pin (130).

4. An ash bucket water-cooled wall according to claim 1, wherein the water-cooled wall body (10) comprises a front wall (11), a rear wall (13), a left wall (12) and a right wall (14), the front wall (11) and the rear wall (13) are oppositely arranged, the distance between the inner wall of the front wall (11) and the inner wall of the rear wall (13) is gradually close from top to bottom, the left wall (12) and the right wall (14) are oppositely arranged, and the wear-resistant belt (200) is positioned on the front wall (11) and/or the rear wall (13).

5. An ash bucket water cooled wall according to claim 4, wherein a plurality of the anti-wear strips (200) are evenly spaced on the front wall (11) and/or a plurality of the anti-wear strips (200) are evenly spaced on the rear wall (13).

6. An ash bucket water cooled wall according to claim 5, wherein the longest wear strip on the front wall (11) is located at the junction of the front wall (11) and the left wall (12) and/or the longest wear strip on the rear wall (13) is located at the junction of the rear wall (13) and the right wall (14).

7. The ash bucket water cooled wall of claim 5, wherein the plurality of wear strips (200) on the front wall (11) are sequentially longer from windward side to non-windward side, and/or the plurality of wear strips (200) on the rear wall (13) are sequentially longer from windward side to non-windward side.

8. The ash bucket water wall of claim 2, wherein the anti-wear spray layer (110) is located on the windward side of the anti-wear plastic material layer (120), and a portion of the anti-wear plastic material layer (120) overlies the anti-wear spray layer (110).

9. An ash bucket water wall according to claim 2, wherein the chamfer is in the range of 30 ° to 45 °.

10. A tower boiler, characterized in that it comprises an ash bucket waterwall according to any one of claims 1 to 9.

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