CN218895422U - Furnace bottom sealing device - Google Patents
Furnace bottom sealing device Download PDFInfo
- Publication number
- CN218895422U CN218895422U CN202222537286.XU CN202222537286U CN218895422U CN 218895422 U CN218895422 U CN 218895422U CN 202222537286 U CN202222537286 U CN 202222537286U CN 218895422 U CN218895422 U CN 218895422U
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- water
- plug
- sealing
- piece
- insert
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- 238000007789 sealing Methods 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000002893 slag Substances 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 15
- 230000008602 contraction Effects 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008021 deposition Effects 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The application discloses stove bottom sealing device includes: the lower plug-in is arranged at the top of the slag hopper; the upper plug-in is arranged at the bottom of the water-cooled wall and is connected with the lower plug-in, and a closed space is formed between the slag hopper and the water-cooled wall; the sealing piece is arranged around the upper plug-in piece and the lower plug-in piece, is made of flexible materials, and is in sealing connection with the water cooling wall and the slag hopper. According to the water seal structure, the upper plug-in, the lower plug-in and the sealing piece are arranged, so that the sealing effect basically consistent with the water seal structure in the prior art is achieved, and the sealing effect of the upper plug-in and the lower plug-in can be further improved. The upper plug-in component, the lower plug-in component and the sealing piece in the application are combined, a water seal structure and a sand seal structure in the prior art can be replaced, a series of problems that ash deposition in a water seal groove occurs, the water seal plug board is severely deformed due to the fact that the water seal plug board is blocked in downward expansion, or the sand seal structure plug board is easily deformed are avoided.
Description
Technical Field
The application relates to the technical field of boilers, in particular to a furnace bottom sealing device.
Background
At present, the sealing between the boiler water-cooling wall and the slag hopper of each thermal power plant is mostly sealed by adopting a water seal inserting plate, and the reason for arranging the water seal inserting plate is as follows: after the ignition of the boiler is started, the water-cooled wall is heated and expanded, and for a 145MW pulverized coal boiler, the length of the water-cooled wall is extended by 260mm under the full load of the boiler compared with the length of the water-cooled wall under the cold state, and the length of the water-cooled wall changes along with the change of temperature. The slag hopper positioned at the lower part of the water wall is fixed on the ground, and the distance between the slag hopper and the water wall can be changed along with the change of the wall temperature of the water wall. In the running process of the unit, a gap for ensuring the downward expansion of the water-cooling wall is required between the slag hopper and the water-cooling wall, and air cannot enter the gap, and a furnace bottom water seal groove arranged between the water-cooling wall and the slag hopper ensures the sealing in the expansion process of the water-cooling wall, so that the tightness of a dynamic and static joint at the lower part of a hearth is maintained, and air leakage is prevented.
However, ash enters the water seal tank in the operation of the furnace bottom water seal, ash deposition in the water seal tank is easy to occur, the water seal plugboard is blocked by downward expansion, the water seal plugboard is seriously deformed, and even the unplanned shutdown accident of the unit is caused by cracking of a water wall suspension welding seam. On the other hand, after the inside of the furnace bottom water seal tank is blocked, the filled sealing water overflows from the outside of the furnace bottom water seal tank, so that the pollution of a boiler room and other equipment is serious.
Meanwhile, in order to save water resources, the existing water seal tank generally adopts slag flushing water of a slag removal system, and the water contains more fine slag and is easy to precipitate in the water seal tank and the inner wall of the water seal pipeline, so that the water seal tank is scaled and blocked by a water pipe, and when the water pipe is seriously blocked, the water seal is deficient, and the sealing effect of the water seal at the bottom of the furnace is directly lost.
In addition, at present, some power plants change a furnace bottom water seal system into sand seal, namely light sand is used for replacing slag water, so that a large amount of water for water seal is saved, and the water seal system is effective from the aspect of water saving, but after the light sand is used for a period of time, the hardening phenomenon is easy to occur, and the light sand is easy to be adhered to an inserting plate in the process of stopping a boiler; in the starting process of the boiler, the water seal plugboard also bears great resistance when being inserted downwards, so that the plugboard is deformed, and the problem of poor sealing occurs.
Disclosure of Invention
In view of the above, it is necessary to provide a furnace bottom sealing device.
The furnace bottom sealing device comprises a slag hopper, a boiler and a water cooling wall, and further comprises:
the lower plug-in is arranged at the top of the slag hopper;
the upper plug-in is arranged at the bottom of the water-cooled wall and is connected with the lower plug-in, and a closed space is formed between the slag hopper and the water-cooled wall;
the sealing piece is arranged around the upper plug-in piece and the lower plug-in piece, is made of flexible materials, and is in sealing connection with the water cooling wall and the slag hopper.
In some embodiments, the upper insert and the lower insert are formed into annular plates, and during expansion and contraction of the water-cooled wall, the side surface of the upper insert is in reciprocating abutting connection with the side surface of the lower insert.
In some embodiments, the furnace bottom sealing device further comprises:
a stopper formed in a rod shape;
the sliding port is formed in the lower plug-in unit along the vertical direction, the sliding port is formed in the upper plug-in unit along the horizontal direction, the limiting piece is arranged in the sliding port of the upper plug-in unit and the lower plug-in unit in a penetrating manner, and in the expansion and contraction process of the water-cooled wall, the limiting piece slides back and forth in the sliding port.
In some embodiments, the furnace bottom sealing device further comprises:
the slag blocking piece is arranged on one side, away from the sealing piece, of the upper plug-in piece and the lower plug-in piece, and is fixed at the bottom of the water cooling wall.
Compared with the prior art, the beneficial effects of this application are:
firstly, through setting up plug-in components and lower plug-in components, the water-cooling wall expansion and contraction in-process, slag bucket with form airtight space between the water-cooling wall, realized with the sealing effect that water seal structure is basic unanimous in prior art, secondly, through setting up the sealing member, can further improve the sealing effect of plug-in components and lower plug-in components. The upper plug-in component, the lower plug-in component and the sealing piece in the application are combined, a water seal structure and a sand seal structure in the prior art can be replaced, a series of problems that ash deposition in a water seal groove occurs, the water seal plug board is severely deformed due to the fact that the water seal plug board is blocked in downward expansion, or the sand seal structure plug board is easily deformed are avoided.
Drawings
FIG. 1 is a schematic vertical cross-section of an exemplary embodiment of the present application;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
fig. 3 is a schematic diagram showing a movement relationship of an upper board and a lower board in an exemplary embodiment of the present application.
In the figure: 1. a slag bucket; 2. a boiler; 3. a water cooling wall; 41. a lower plug-in; 411. a slide-down hole; 42. an upper insert; 421. an upper slide hole; 43. a limiting piece; 431. an anti-falling member; 5. a seal; 6. slag stopper.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
As described in the background art, the bottom sealing structure of the boiler in the prior art has two forms, one is a water sealing structure, and the other is a sand sealing structure.
In the water seal structure, ash residues enter the water seal tank in the running process of the furnace bottom water seal, ash residue deposition in the water seal tank is easy to occur, the water seal plugboard is blocked by downward expansion, the water seal plugboard is seriously deformed, and even the water wall suspension welding seam cracking is caused, so that the unit is not scheduled to stop running. On the other hand, after the inside of the furnace bottom water seal tank is blocked, the filled sealing water overflows from the outside of the furnace bottom water seal tank, so that the pollution of a boiler room and other equipment is serious. Meanwhile, in order to save water resources, the existing water seal tank generally adopts slag flushing water of a slag removal system, and the water contains more fine slag and is easy to precipitate in the water seal tank and the inner wall of the water seal pipeline, so that the water seal tank is scaled and blocked by a water pipe, and when the water pipe is seriously blocked, the water seal is deficient, and the sealing effect of the water seal at the bottom of the furnace is directly lost.
In the sand seal structure, the slag water is replaced by the light sand, so that a large amount of water for water seal is saved, and the water seal structure is effective from the aspect of water saving, however, after the light sand is used for a period of time, the hardening phenomenon is easy to occur, and the light sand is easy to be adhered to the plugboard in the boiler shutdown process; in the starting process of the boiler, the water seal plugboard also bears great resistance when being inserted downwards, so that the plugboard board is deformed, and the problem of poor sealing occurs.
To improve the above-mentioned problem, the present application proposes a furnace bottom sealing device, referring to fig. 1, which mainly includes: slag bucket 1, boiler 2, water-cooling wall 3, insert 41 down, insert 42, sealing member 5, locating part 43 and pushing off slag spare 6 down, with the slag bucket 1 in prior art, boiler 2 and water-cooling wall 3 set up the mode unanimously, slag bucket 1 is fixed to be set up in ground, and boiler 2 mouth is located slag bucket 1 directly over, and water-cooling wall 3 adheres to boiler 2 wall. The present application aims to achieve a sealing effect consistent with the water seal type structure and the sand seal type structure in the prior art and to avoid the problems existing in the prior art by providing the upper insert 42, the lower insert 41 and the sealing member 5.
Specifically, in the exemplary embodiment, the lower insert 41 is formed in an annular plate shape, and is disposed around the mouth of the slag bucket 1, and one side of the lower insert is welded and fixed to the top edge of the slag bucket 1, the upper insert 42 is formed in an annular plate structure matching with the lower insert 41, and the size of the upper insert 42 is smaller than that of the lower insert 41, so that the outer side surface of the upper insert 42 is in reciprocating abutting contact with the inner side surface of the lower insert 41 in the expansion and contraction process of the water wall 3. Further, the upper insert 42 and the lower insert 41 are always connected in the deformation process of the water wall 3, so that a closed space is formed between the slag bucket 1 and the water wall 3.
In other embodiments, the horizontal cross sections of the upper insert 42 and the lower insert 41 may be quadrilateral or other shapes, so long as the two can meet the function of reciprocal abutment in the expansion and contraction process of the water wall 3. Further, the upper insert 42 and the lower insert 41 may be made of wear-resistant steel, so as to prevent the sealing effect from being poor after long-term use.
Specifically, referring to fig. 1 and 2, in the exemplary embodiment, the limiting member 43 is disposed at the positions of the upper insert 42 and the lower insert 41, so as to avoid a gap between the upper insert 42 and the lower insert 41, and easy to cause ash entering, where, referring to fig. 3, a sliding opening is formed on the lower insert 41 along a vertical direction, a sliding opening is formed on the upper insert 42 at a position corresponding to the sliding opening along a horizontal direction, the limiting member 43 is disposed in the sliding opening and the sliding opening, further, the limiting member 43 is formed into a rod shape, and protruding anti-falling members 431 are disposed at two ends of the limiting member to integrally clamp the limiting member 43 in the upper insert 42 and the lower insert 41. In the expansion and contraction process of the water-cooled wall 3, the limiting piece 43 can slide back and forth in the sliding port no matter in the horizontal or vertical expansion displacement, and the expansion is prevented.
Specifically, in the exemplary embodiment, the sealing member 5 is formed in a ring shape, and is disposed around the upper insert 42 and the lower insert 41, and is made of a flexible material, and is used to connect the water wall 3 and the slag bucket 1 in a sealing manner. Further, the sealing element 5 comprises an inner liner layer made of high-temperature-resistant composite ceramic fiber cloth and an outer layer made of a high-temperature-resistant skin material, the inner liner layer and the outer layer are adhered by heat-resistant adhesive, the high-temperature-resistant composite ceramic fiber cloth can resist the temperature of 1200 ℃, and has excellent heat insulation effect, the inner liner layer of the sealing element 5 completely meets the use requirement, the outer layer adopts the high-temperature-resistant skin material, so that the sealing element not only has good sealing effect, but also can bear repeated shrinkage deformation for a long time without cracking, and the sealing of the furnace bottom is ensured to achieve zero leakage.
Specifically, in the exemplary embodiment, the slag blocking member 6 is disposed on a side of the upper insert 42 and the lower insert 41 facing away from the sealing member 5, which is formed in a ring-shaped plate shape, and one side thereof is fixed to the bottom of the water wall 3, and when the boiler 2 discharges ash, the slag blocking member 6 can block most of the ash from entering the positions of the upper insert 42 and the lower insert 41, so as to play a role in preventing the ash from being stuck to the upper insert 42 and the lower insert 41.
In summary, by arranging the upper insert 42 and the lower insert 41, a closed space is formed between the slag bucket 1 and the water-cooled wall 3 in the expansion and contraction process of the water-cooled wall 3, so that a sealing effect basically consistent with that of the water seal structure in the prior art is achieved, and secondly, by arranging the sealing element 5, the sealing effect of the upper insert 42 and the lower insert 41 can be further improved. The upper plug-in 42, the lower plug-in 41 and the sealing piece 5 in the application are combined, so that the water seal structure and the sand seal structure in the prior art can be replaced, a series of problems that ash deposition in a water seal groove occurs, the water seal plug board is blocked in downward expansion to cause serious deformation of the water seal plug board, or the sand seal structure plug board is easy to deform and the like are avoided.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present application, and is not intended to limit the present application, but although the present application has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or that equivalents may be substituted for part of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (4)
1. The utility model provides a stove bottom sealing device, includes sediment fill (1), boiler (2) and water-cooling wall (3), its characterized in that still includes:
a lower insert (41) arranged at the top of the slag hopper (1);
the upper plug-in (42) is arranged at the bottom of the water-cooled wall (3) and is connected with the lower plug-in (41), and a closed space is formed between the slag hopper (1) and the water-cooled wall (3);
the sealing piece (5) is arranged around the upper plug-in piece (42) and the lower plug-in piece (41), is made of flexible materials, and is in sealing connection with the water cooling wall (3) and the slag hopper (1).
2. The furnace bottom sealing device according to claim 1, characterized in that the upper insert (42) and the lower insert (41) are formed as annular plates, and the side surfaces of the upper insert (42) are in reciprocal abutment with the side surfaces of the lower insert (41) during expansion and contraction of the water wall (3).
3. The hearth sealing apparatus of claim 2, further comprising:
a stopper (43) formed in a rod shape;
the sliding port is formed in the lower plug-in unit (41) in the vertical direction, the sliding port is formed in the upper plug-in unit (42) in the horizontal direction, the limiting piece (43) is arranged in the sliding port of the upper plug-in unit (42) and the lower plug-in unit (41) in a penetrating mode, and the limiting piece (43) slides back and forth in the sliding port in the expansion and contraction process of the water wall (3).
4. The hearth sealing apparatus of claim 1, further comprising:
the slag blocking piece (6) is arranged on one side, away from the sealing piece (5), of the upper insert (42) and the lower insert (41), and is fixed at the bottom of the water-cooled wall (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222537286.XU CN218895422U (en) | 2022-09-22 | 2022-09-22 | Furnace bottom sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222537286.XU CN218895422U (en) | 2022-09-22 | 2022-09-22 | Furnace bottom sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218895422U true CN218895422U (en) | 2023-04-21 |
Family
ID=85996028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222537286.XU Withdrawn - After Issue CN218895422U (en) | 2022-09-22 | 2022-09-22 | Furnace bottom sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218895422U (en) |
-
2022
- 2022-09-22 CN CN202222537286.XU patent/CN218895422U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20230421 Effective date of abandoning: 20231108 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20230421 Effective date of abandoning: 20231108 |