CN212537816U - Novel wear-resisting structure of CFB boiler water-cooling wall - Google Patents
Novel wear-resisting structure of CFB boiler water-cooling wall Download PDFInfo
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- CN212537816U CN212537816U CN202021324142.0U CN202021324142U CN212537816U CN 212537816 U CN212537816 U CN 212537816U CN 202021324142 U CN202021324142 U CN 202021324142U CN 212537816 U CN212537816 U CN 212537816U
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Abstract
The utility model discloses a novel wear-resisting structure of CFB boiler water-cooling wall belongs to boiler tubular product abrasionproof and decreases technical field, is proposed to the not good defect of current water-cooling wall abrasionproof structural effect, and it includes: water wall pipe and abrasionproof pouring material layer, water wall pipe structure as an organic whole, it is including the water wall pipe straight section of going up that from top to bottom connects gradually, straight section under changeover portion and the water wall pipe, straight section is parallel and inside and outside dislocation set on water wall pipe straight section and the water wall pipe under the water wall pipe, the changeover portion lower extreme inclines to boiler outside direction, straight section forms to boiler outside depressed area between for water wall pipe straight section under changeover portion and the water wall pipe, the abrasionproof pouring material layer is fixed in the depressed area, and straight section department coplanar on abrasionproof pouring material layer and the water wall pipe, straight section and the juncture spraying of abrasionproof pouring material layer have the abrasionproof to decrease coating on the water wall pipe. The utility model discloses change the shape of water-cooling wall pipe, eliminate the boss and hinder, avoided granule backward flow bounce-back to produce wearing and tearing to the water-cooling wall pipe.
Description
The technical field is as follows:
the utility model belongs to the technical field of boiler tubular product abrasionproof decreases, concretely relates to novel wear-resisting structure of CFB boiler water-cooling wall.
Background art:
when the fluidized bed boiler with high circulation rate burns, fluid or solid particles exist in the cavity of the fluidized bed boiler for a long time, the slip speed between gas-solid two-phase flow is high, the fluidization wind speed is low near the water-cooled wall, the particles move upwards along with the airflow, meanwhile, the solid particles also flow downwards along the furnace wall, and the fluid or the solid particles can impact and abrade the water-cooled wall. In current water-cooling wall anti-abrasion structure, prevent the wearing and tearing of water-cooling wall department through set up the abrasionproof castable layer on the water-cooling wall, as shown in fig. 3, 1 is the water-cooling wall pipe in the picture, 2 is the abrasionproof castable layer, but when solid particle downward flow, run into the boss above the water-cooling wall and promptly the abrasionproof castable layer 2, can let the granule form bounce-back, make the water-cooling wall that is located the boss top in the continuous scouring process, form serious wearing and tearing and promptly reference numeral 5 departments in fig. 3, 5 are water-cooling wall wearing and tearing district, will lead to leaking, the safe and reliable operation of direct influence boiler.
The utility model has the following contents:
the utility model discloses an overcome the not good defect of current water-cooling wall wear-resisting structure effect, provide a novel wear-resisting structure of CFB boiler water-cooling wall, make water-cooling wall surface level and smooth through reducing the boss, avoid the backward flow bounce-back of material, eliminate local wear, improve the security of operation.
The utility model discloses a technical scheme lie in: a novel wear-resistant structure of a CFB boiler water wall comprises: the utility model discloses a boiler, including water wall pipe and abrasionproof pouring bed of material, water wall pipe structure as an organic whole, straight section under straight section, changeover portion and the water wall pipe on the water wall pipe that it connects gradually from top to bottom, straight section parallel and inside and outside dislocation set on straight section and the water wall pipe under the water wall pipe, the changeover portion lower extreme inclines to boiler outside direction, and straight section forms to boiler outside depressed area between the straight section on the changeover portion and the water wall pipe under the changeover portion and the water wall pipe, the abrasionproof pouring bed of material is fixed in the depressed area, and the medial surface of abrasionproof pouring bed of material and the medial surface of straight section on the water wall pipe are in the coplanar, and the juncture spraying of straight section and abrasionproof pouring bed of material has the abrasionproof coating on the water wall pipe.
Preferably, the wear protection coating is a silicon carbide coating.
Preferably, the ratio of the horizontal distance h between the centers of the upper straight section of the water wall tube and the lower straight section of the water wall tube to the diameter of the upper straight section of the water wall tube is 2: 3.
preferably, the anti-abrasion castable layer is fixed on the transition section and the lower straight section of the water wall tube through L-shaped pins.
The utility model has the advantages that:
1. the utility model discloses a change the shape of water wall pipe, when making the abrasionproof pouring material layer fix on the water wall pipe, the water wall pipe is located the coplanar with the whole of abrasionproof pouring material layer, because the smooth plane that water wall pipe and abrasionproof pouring material layer after the improvement formed, at the process of solid particle whereabouts, there is not the boss to obstruct, the impact has been reduced, the wearing and tearing that produce the water wall pipe when having avoided the solid particle backward flow to bounce-back, workman's maintenance volume and maintenance cost have been reduced, the security of boiler operation has been improved.
2. The utility model discloses the juncture spraying on water wall pipe and abrasionproof castable layer has the abrasionproof coating, can improve the stability of water wall pipe and the junction of abrasionproof castable layer, is difficult for making the juncture produce the oxidation problem.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a prior art water wall wear prevention structure;
wherein: 1 water wall tube, 11 water wall tube upper straight section, 12 transition sections, 13 water wall tube lower straight sections, 2 anti-abrasion castable layers, 3 anti-abrasion coatings, 4 pins and 5 water wall abrasion areas.
The specific implementation mode is as follows:
as shown in fig. 1 and fig. 2, the utility model relates to a novel wear-resistant structure of CFB boiler water-cooling wall, include: water wall pipe 1 and abrasionproof pouring bed of material 2, water wall pipe 1 structure as an organic whole, straight section 13 under straight section 11, changeover portion 12 and the water wall pipe on its water wall pipe that from top to bottom connects gradually, straight section 13 is parallel and inside and outside dislocation set on straight section 13 and the water wall pipe under the water wall pipe, the ratio of straight section 11 central horizontal distance h and the water wall pipe on straight section 11 and the water wall pipe on the water wall pipe is 2 under straight section 11 and the water wall pipe: and 3, the lower end of the transition section 12 inclines towards the outer side of the boiler, so that the lower straight section 13 of the water wall tube is close to the outer side of the boiler. The transition section 12 and the lower water wall tube straight section 13 form a recessed area towards the outside of the boiler relative to the upper water wall tube straight section 11, and the recessed area is used for accommodating the wear-resistant castable layer 2.
The utility model discloses a wear-resisting pouring material layer 2, including the straight section 13 on the straight section 2, wear-resisting pouring material layer 2 is fixed in the concave region including through a plurality of L type pins 3 of welding respectively under transition section 12 and the water wall pipe, and the medial surface of wear-resisting pouring material layer 2 and the water wall pipe on the medial surface of straight section 11 be in the coplanar, through eliminating protruding wear-resisting pouring material layer 2 in the furnace, make along water wall pipe 1 all around the granule that flows downwards can not produce the bounce-back phenomenon at water wall pipe 1 and wear-resisting pouring material layer 2 juncture, effectively avoided being located wear-resisting pouring material layer 2 top 1 and producing wearing and tearing.
The juncture of the upper straight section 11 of the water wall pipe and the anti-abrasion castable layer 2 is coated with an anti-abrasion coating 3, the anti-abrasion coating 3 enables the upper straight section 11 of the water wall pipe and the anti-abrasion castable layer 2 to be in smooth transition, and meanwhile, a gap generated between the upper straight section 11 of the water wall pipe and the anti-abrasion castable layer 2 is filled. The anti-abrasion coating 3 is a silicon carbide coating, the silicon carbide coating adopts an integrated injection molding spraying mode, the stability of the connection part of the water wall pipe and the anti-abrasion castable layer can be improved through the spraying anti-abrasion coating 3, and the impact force on the junction part is reduced.
The installation process comprises the following steps:
during installation, the pins 4 are welded on the transition section 12 and the lower straight section 13 of the water wall tube at intervals, then the anti-abrasion castable layer 2 is fixed on the pins 4, and finally the anti-abrasion coating 3 is sprayed at the junction of the upper straight section 11 of the water wall tube and the anti-abrasion castable layer 2.
The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A novel wear-resistant structure of a CFB boiler water wall comprises: a water wall tube (1) and an anti-abrasion casting material layer (2), and is characterized in that the water wall tube (1) is of an integral structure, which comprises an upper straight section (11) of a water wall tube, a transition section (12) and a lower straight section (13) of the water wall tube which are sequentially connected from top to bottom, wherein the lower straight section (13) of the water wall tube is parallel to the upper straight section (11) of the water wall tube and is arranged in a staggered way inside and outside, the lower end of the transition section (12) inclines towards the outer side of the boiler, a concave area towards the outer side of the boiler is formed between the transition section (12) and the lower straight section (13) of the water wall tube relative to the upper straight section (11) of the water wall tube, the anti-abrasion castable layer (2) is fixed in the concave area, the inner side surface of the anti-abrasion castable layer (2) and the inner side surface of the upper straight section (11) of the water wall tube are positioned on the same plane, an anti-abrasion coating (3) is sprayed at the junction of the upper straight section (11) of the water wall pipe and the anti-abrasion castable layer (2).
2. The novel wear-resistant structure for the water wall of the CFB boiler as claimed in claim 1, wherein: the anti-abrasion coating (3) is a silicon carbide coating.
3. The novel wear-resistant structure for the water wall of the CFB boiler as claimed in claim 2, wherein: the ratio of the central horizontal distance h between the upper straight section (11) of the water wall tube and the lower straight section (13) of the water wall tube to the pipe diameter of the upper straight section (11) of the water wall tube is 2: 3.
4. the novel wear-resistant structure for the water wall of the CFB boiler as claimed in any one of claims 1 to 3, wherein: the anti-abrasion castable layer (2) is fixed on the transition section (12) and the lower straight section (13) of the water wall tube through L-shaped pins (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021324142.0U CN212537816U (en) | 2020-07-08 | 2020-07-08 | Novel wear-resisting structure of CFB boiler water-cooling wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021324142.0U CN212537816U (en) | 2020-07-08 | 2020-07-08 | Novel wear-resisting structure of CFB boiler water-cooling wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212537816U true CN212537816U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021324142.0U Active CN212537816U (en) | 2020-07-08 | 2020-07-08 | Novel wear-resisting structure of CFB boiler water-cooling wall |
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| Country | Link |
|---|---|
| CN (1) | CN212537816U (en) |
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2020
- 2020-07-08 CN CN202021324142.0U patent/CN212537816U/en active Active
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