CN215294893U - Circulating fluidized bed boiler slag notch wear-resisting structure - Google Patents
Circulating fluidized bed boiler slag notch wear-resisting structure Download PDFInfo
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- CN215294893U CN215294893U CN202120227596.4U CN202120227596U CN215294893U CN 215294893 U CN215294893 U CN 215294893U CN 202120227596 U CN202120227596 U CN 202120227596U CN 215294893 U CN215294893 U CN 215294893U
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Abstract
An arc-shaped protective cover covers the upper part of a slag falling hole of a circulating fluidized bed boiler, the arc-shaped protective cover comprises a first half protective cover and a second half protective cover, and the inner arc sides of the first half protective cover and the second half protective cover are both welded with an inner sleeve; an expansion gap is formed between the welded first half protective cover and the welded second half protective cover; the outer arc edge of the arc-shaped protective cover is welded with an arc-shaped plate, and the side surface of the arc-shaped plate is welded with an outer sleeve. The number of the arc-shaped plates is eight, and the eight arc-shaped plates are in an eight-claw shape. The bottom of the arc-shaped plate is welded with the water-cooling air distribution plate fins of the circulating fluidized bed boiler. V-shaped grabbing nails are welded on the outer side of the arc-shaped protective cover and the fins of the water-cooling air distribution plate and are arranged in a grid shape in a staggered mode. The technical scheme can ensure that the occurrence of unplanned shutdown events caused by the abrasion of the slag-proof pipe orifice does not occur in one overhaul period, not only can improve the safety and reliability of equipment, but also can reduce the huge loss caused by accidents and save the starting cost and the overhaul cost.
Description
Technical Field
The utility model relates to an anti-abrasion structure, in particular to circulating fluidized bed boiler slag notch anti-abrasion structure.
Background
At present, a water-cooling deslagging pipe is adopted in a traditional boiler deslagging pipe, water led out from a steam pocket down pipe is used as a cooling water source, the deslagging pipe comprises an inner sleeve pipe and an outer sleeve pipe, a cooling water inlet pipe, a cooling water outlet pipe, a plurality of partition plates, circulation holes and the like, the inner sleeve pipe is fixedly welded with the upper partition plate and the lower partition plate, the other end of each partition plate is connected with the outer sleeve pipe, a space between the inner sleeve pipe and the outer sleeve pipe is used as a water side, the cooling water source is taken from a lower header behind a water-cooled wall, cooling water is finally led to an upper header of the water-cooled wall, and finally the cooling water is led into a steam pocket.
The leakage of the slag discharge pipe often occurs in the existing slag discharge pipe of the boiler. By investigating the service conditions of the slag discharging pipes of each power plant, the problems of erosion and abrasion of the slag preventing pipes exist in the heat insulation slag discharging pipes and the water cooling slag discharging pipes, so that the unplanned shutdown of the boiler is caused, the huge loss caused by accidents is caused, and the starting cost and the maintenance cost are wasted. Therefore, the research on how to prevent the water-cooling slag discharging pipe from being worn is a technical problem which needs to be researched and solved urgently in the current power plant.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a circulating fluidized bed boiler slag notch wear-resisting structure falls solves the slag pipe and erodes the problem that the outage that the wearing and tearing leaked and cause economic loss that erodees.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a slag falling hole anti-abrasion structure of a circulating fluidized bed boiler is formed at the end part of a slag discharging pipe, the slag discharging pipe comprises an inner sleeve and an outer sleeve, an arc-shaped protective cover covers the upper part of the slag falling hole, the arc-shaped protective cover comprises a first half protective cover and a second half protective cover, and the inner arc sides of the first half protective cover and the second half protective cover are welded with the inner sleeve; an expansion gap is formed between the first half protective cover and the second half protective cover after welding; the outer arc border welding of arc protection casing has the arc, the arc side with the outer tube welding.
As the optimal scheme of the abrasion-proof structure of the slag falling opening of the circulating fluidized bed boiler, the number of the arc-shaped plates is eight, and the eight arc-shaped plates are in an eight-claw shape.
As the preferred scheme of the abrasion-proof structure of the slag falling opening of the circulating fluidized bed boiler, the bottom of the arc-shaped plate is welded with the water-cooling air distribution plate fins of the circulating fluidized bed boiler.
As the preferable scheme of the abrasion-proof structure of the slag falling port of the circulating fluidized bed boiler, V-shaped grabbing nails are welded on the outer side of the arc-shaped protective cover and the fins of the water-cooling air distribution plate and are arranged in a grid shape in a staggered mode.
As a preferred scheme of the abrasion-proof structure of the slag falling opening of the circulating fluidized bed boiler, a layer of plastic material is laid on the grabbing nails.
As a preferred scheme of the abrasion-proof structure of the slag falling opening of the circulating fluidized bed boiler, bell-type blast caps are arranged around the slag discharging pipe.
The upper part of the slag falling hole of the utility model is covered with an arc-shaped protective cover, the arc-shaped protective cover comprises a first half protective cover and a second half protective cover, and the inner arc sides of the first half protective cover and the second half protective cover are both welded with the inner sleeve; an expansion gap is formed between the welded first half protective cover and the welded second half protective cover; the outer arc edge of the arc-shaped protective cover is welded with an arc-shaped plate, and the side surface of the arc-shaped plate is welded with an outer sleeve. The technical scheme can ensure that the occurrence of unplanned shutdown events caused by the abrasion of the slag-proof pipe orifice does not occur in one overhaul period, not only can improve the safety and reliability of equipment, but also can reduce the huge loss caused by accidents and save the starting cost and the overhaul cost.
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 should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
Fig. 1 is a schematic top view of an arc-shaped protective cover in a wear-resistant structure of a slag notch of a circulating fluidized bed boiler provided in an embodiment of the present invention;
fig. 2 is a schematic front view of an arc-shaped protective cover in the abrasion-proof structure of the slag notch of the circulating fluidized bed boiler provided in the embodiment of the present invention;
fig. 3 is an installation schematic view of an arc-shaped protective cover in the abrasion-proof structure of the slag falling port of the circulating fluidized bed boiler provided in the embodiment of the present invention.
In the figure, 1, a slag falling port; 2. an inner sleeve; 3. an outer sleeve; 4. an arc-shaped protective cover; 5. a first half shield; 6. a second half shield; 7. an expansion gap; 8. an arc-shaped plate.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, 2 and 3, an abrasion-proof structure for a slag notch of a circulating fluidized bed boiler is provided, wherein the slag notch 1 is formed at the end of a slag tapping pipe, the slag tapping pipe comprises an inner sleeve 2 and an outer sleeve 3, an arc-shaped protective cover 4 covers the upper part of the slag notch 1, the arc-shaped protective cover 4 comprises a first half protective cover 5 and a second half protective cover 6, and the inner arc sides of the first half protective cover 5 and the second half protective cover 6 are welded with the inner sleeve 2; an expansion gap 7 is formed between the first half-protection cover 5 and the second half-protection cover 6 after welding; the outer arc border welding of arc protection casing 4 has arc 8, the arc 8 side with outer tube 3 welding.
Specifically, an arc-shaped protective cover 4 is additionally arranged at the upper part of the slag falling opening 1, and the upper part of the arc-shaped protective cover 4 is in an arc shape with the inner diameter of 159mm and the outer diameter of 231 mm. Considering that the arc type shield 4 is expanded by the heat of the high temperature slag, the arc type shield 4 is installed in such a manner that it is divided into two parts, a first half shield 5 and a second half shield 6, with a gap of 1mm left therebetween as an expansion gap 7 of the shield. The inner arc side of the upper part of the arc-shaped protective cover 4 is welded with the inner sleeve 2 of the slag-tap hole, so that most of heat of the protective cover heated by slag can be transferred to cooling water in the slag-tap hole, and the protective cover is not heated to be denatured.
In an embodiment of the abrasion-proof structure for the slag falling hole of the circulating fluidized bed boiler, the number of the arc-shaped plates 8 is eight, and the eight arc-shaped plates 8 are in an eight-claw shape. The outer arc border of arc protection casing 4 welds eight arc boards 8 altogether, and the shape is like eight claws, and 4 thickness of arc protection casing are 6mm, and material ZG40Cr25Ni20, this material is unanimous with hood dustcoat material, has the abrasionproof effect. In addition, the wall thickness of the inner sleeve 2 is increased from 10mm to 20mm, and the original size 219 multiplied by 20 of the outer sleeve 3 is reserved; the material is 12Cr1 MoV.
In an embodiment of the abrasion-proof structure for the slag falling port of the circulating fluidized bed boiler, the bottom of the arc-shaped plate 8 is welded with a water-cooling air distribution plate fin of the circulating fluidized bed boiler. V-shaped grabbing nails are welded on the outer side of the arc-shaped protective cover 4 and the fins of the water-cooling air distribution plate and are arranged in a grid shape in a staggered mode. Eight arc plates 8 at the lower part of the arc-shaped protective cover 4 are welded with the water-cooling air distribution plate fins, and the side surfaces are welded with the outer sleeve 3 of the water-cooling slag discharge pipe.
As a preferred scheme of the abrasion-proof structure of the slag falling opening of the circulating fluidized bed boiler, a layer of plastic material is laid on the grabbing nails. V-shaped grabbing nails are welded on the outer side of the arc-shaped protective cover 4 and the fins and are arranged in a staggered mode to form a grid shape. Finally, a layer of plastic material is laid on the grabbing nail and is in smooth transition with the plastic material of the original water-cooling air distribution plate; the holding force of the pouring material is improved.
Specifically, the plastic material is one of unshaped refractory materials, and is prepared by adding 10-25% of plastic clay and other bonding agents and a proper amount of plasticizers into 70-80% of granular and powdery materials.
As a preferred scheme of the abrasion-proof structure of the slag falling opening of the circulating fluidized bed boiler, bell-type blast caps are arranged around the slag discharging pipe. Eleven directional blast caps around the existing slag discharging pipe are knocked out, a bell-type blast cap with six holes in the outer cover is replaced, and the positions of blast holes of the blast caps are adjusted, so that the slag discharging pipe is not blown rightly. The consistency of the whole air distribution plate is kept in the form of the air cap, and the uniform air distribution is ensured.
It should be emphasized that those skilled in the art are aware of the structural details of the water-cooled air distribution plate fins, the air cap, etc. of the circulating fluidized bed boiler, and therefore they are not illustrated.
The upper part of the slag falling hole 1 of the utility model is covered with an arc-shaped protective cover 4, the arc-shaped protective cover 4 comprises a first half protective cover 5 and a second half protective cover 6, and the inner arc sides of the first half protective cover 5 and the second half protective cover 6 are both welded with the inner sleeve 2; an expansion gap 7 is formed between the welded first half-protection cover 5 and the second half-protection cover 6; the arc-shaped plate 8 is welded at the outer arc edge of the arc-shaped protective cover 4, and the side surface of the arc-shaped plate 8 is welded with the outer sleeve 3. An arc-shaped protective cover 4 is additionally arranged at the upper part of the slag falling opening 1, and the upper part of the arc-shaped protective cover 4 is in an arc shape with the inner diameter of 159mm and the outer diameter of 231 mm. Considering that the arc type shield 4 is expanded by the heat of the high temperature slag, the arc type shield 4 is installed in such a manner that it is divided into two parts, a first half shield 5 and a second half shield 6, with a gap of 1mm left therebetween as an expansion gap 7 of the shield. The inner arc side of the upper part of the arc-shaped protective cover 4 is welded with the inner sleeve 2 of the slag-tap hole, so that most of heat of the protective cover heated by slag can be transferred to cooling water in the slag-tap hole, and the protective cover is not heated to be denatured. The outer arc border of arc protection casing 4 welds eight arc boards 8 altogether, and the shape is like eight claws, and 4 thickness of arc protection casing are 6mm, and material ZG40Cr25Ni20, this material is unanimous with hood dustcoat material, has the abrasionproof effect. In addition, the wall thickness of the inner sleeve 2 is increased from 10mm to 20mm, and the original size 219 multiplied by 20 of the outer sleeve 3 is reserved; the material is 12Cr1 MoV. V-shaped grabbing nails are welded on the outer side of the arc-shaped protective cover 4 and the fins and are arranged in a staggered mode to form a grid shape. Finally, a layer of plastic material is laid on the grabbing nail and is in smooth transition with the plastic material of the original water-cooling air distribution plate; the holding force of the pouring material is improved. Eleven directional blast caps around the existing slag discharging pipe are knocked out, a bell-type blast cap with six holes in the outer cover is replaced, and the positions of blast holes of the blast caps are adjusted, so that the slag discharging pipe is not blown rightly. The consistency of the whole air distribution plate is kept in the form of the air cap, and the uniform air distribution is ensured. The technical scheme can ensure that the occurrence of unplanned shutdown events caused by the abrasion of the slag-proof pipe orifice does not occur in one overhaul period, not only can improve the safety and reliability of equipment, but also can reduce the huge loss caused by accidents and save the starting cost and the overhaul cost.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. A slag falling hole anti-abrasion structure of a circulating fluidized bed boiler is characterized in that a slag falling hole (1) is formed in the end part of a slag discharging pipe, the slag discharging pipe comprises an inner sleeve (2) and an outer sleeve (3), an arc-shaped protective cover (4) covers the upper part of the slag falling hole (1), the arc-shaped protective cover (4) comprises a first half protective cover (5) and a second half protective cover (6), and the inner arc sides of the first half protective cover (5) and the second half protective cover (6) are welded with the inner sleeve (2); an expansion gap (7) is formed between the first half-protection cover (5) and the second half-protection cover (6) after welding; the outer arc border welding of arc protection casing (4) has arc (8), arc (8) side with outer tube (3) welding.
2. The wear-resistant structure for the slag falling hole of the circulating fluidized bed boiler according to claim 1, characterized in that the number of the arc-shaped plates (8) is eight, and the eight arc-shaped plates (8) are in an eight-claw shape.
3. The abrasion-proof structure for the slag falling hole of the circulating fluidized bed boiler is characterized in that the bottom of the arc-shaped plate (8) is welded with a water-cooling air distribution plate fin of the circulating fluidized bed boiler.
4. The circulating fluidized bed boiler slag notch wear prevention structure of claim 3, characterized in that V-shaped grabs are welded on the outer side of the arc-shaped protective cover (4) and the water-cooling air distribution plate fins, and the grabs are arranged in a grid shape in a staggered manner.
5. The circulating fluidized bed boiler slag notch wear prevention structure of claim 4, wherein the claw nail is coated with a layer of plastic.
6. The wear-resistant structure for the slag falling hole of the circulating fluidized bed boiler according to claim 1, wherein a bell-type hood is arranged around the slag discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120227596.4U CN215294893U (en) | 2021-01-27 | 2021-01-27 | Circulating fluidized bed boiler slag notch wear-resisting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120227596.4U CN215294893U (en) | 2021-01-27 | 2021-01-27 | Circulating fluidized bed boiler slag notch wear-resisting structure |
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| Publication Number | Publication Date |
|---|---|
| CN215294893U true CN215294893U (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120227596.4U Active CN215294893U (en) | 2021-01-27 | 2021-01-27 | Circulating fluidized bed boiler slag notch wear-resisting structure |
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| CN (1) | CN215294893U (en) |
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2021
- 2021-01-27 CN CN202120227596.4U patent/CN215294893U/en active Active
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