CN209655264U - A kind of dust block board and its sealing structure for furnace bottom sealing - Google Patents
A kind of dust block board and its sealing structure for furnace bottom sealing Download PDFInfo
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- CN209655264U CN209655264U CN201920040198.4U CN201920040198U CN209655264U CN 209655264 U CN209655264 U CN 209655264U CN 201920040198 U CN201920040198 U CN 201920040198U CN 209655264 U CN209655264 U CN 209655264U
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Abstract
The utility model discloses a kind of dust block boards and its sealing structure for furnace bottom sealing, belong to boiler seal technical field.The dust block board includes segmented dust block board, the cover board and compensation dust block board for covering adjacent sectional formula dust block board gap.Compensation dust block board includes connecting plate and wire bundle.Connecting plate includes vertical plane and bending side, and vertical plane is fixedly connected by bolt with the side wall of sealed cistern.Wire bundle is set to the bottom of bending side, and the end of wire bundle is crimped with the side of segmented dust block board；Multiple segmented dust block boards are enclosed with multiple cover boards to be connect the sealing of burner hearth and slag well and falls Transitional Space.The dust block board is segmented dust block board, gap is set between adjacent sectional formula dust block board, and cover board is set on gap, the uneven brought stress of water-cooling wall expansion can be effectively eliminated, to avoid deformation, the bending of dust block board, bending structure at closing in can be effectively reduced dust inlet, reduce particulate matter inlet.
Description
Technical field
The utility model relates to a kind of dust block boards and its sealing structure for furnace bottom sealing, belong to boiler seal technology neck
Domain.
Background technique
The mainly furnace bottom water seal of the universal slag removing system configuration of modern large-sized boiler adds the devices such as dragveyer.Scraper plate fishes out slag
Machine is as a kind of slag removal equipment, and suitable for the continuous removing of larger Thermal generation unit boiler bottom lime-ash, and furnace bottom water seal is made
With mainly collect and cooled slag, while keep combustion chamber draft stablize, preventing from leaking out influences combustion conditions.Meanwhile furnace bottom water
Envelope can also provide enough spaces for freely expanding downwards for water-cooling wall.
The principal mode and sealing principle of above-mentioned furnace bottom sealing structure are as follows:
Water seal plate sealing system is one of the important equipment for forming furnace bottom sealing, by water seal plate 2, dust block board 3 and water
4 part of sealing system composition is sealed, sees Fig. 1, water seal plate 2 and the original installation of dust block board 3 are whole circle integral type, upper part and pot
Installation angle steel 1 under furnace water screen header is to be bolted.2 lower part of water seal plate is inserted into the sealing water of slag well water sealing groove, with
Water-cooling wall is expanded downwards and is moved；The water supply of water sealed tank is from high pressure ash flushing water outside factory.3 lower part of dust block board is inserted into slag well 91,
For blocking the lime-ash and coke button that fall down from burner hearth, prevent from entering water sealed tank.Water seal plate and dust block board form dual-seal, prevent
Only furnace bottom leaks out.
There are the following problems for above-mentioned furnace bottom water seal sealing system:
1, because of boiler erection the reason of, the downward swell increment of burner hearth surrounding water-cooling wall is not identical, and each water-cooling wall second line of a couplet
Case is since length is different, and swell increment is not also identical when boiler start/ stop or so.Expanding with heat and contract with cold when boiler start/ stop makes to be mounted on water cooling
Whole circle Integral water-seal plate and dust block board free wxpansion on wall lower collecting box are obstructed, and stretching and pressure by multiple directions
Contracting, presentation is wavy, and serious distortion deformation, the dual-seal of water seal plate and dust block board is seriously damaged, most of region
There is biggish gap of leaking out, furnace bottom is caused seriously to leak out；
2, due to dust block board and sealing pond outer wall need to there are a fixed gap, when flow perturbation occurs for slag well top, because
Amount of dust is larger, and dust can enter in sealed cistern frequently by above-mentioned gap by flow perturbation, slag well 91 and burner hearth 90
Soot particle is deposited in water seal sink, and water seal sink is caused locally to cut off the water supply and water seal water-supply shortages, is leaked out serious；
3, it can be run by external sealing water, it is desirable that have the water source for stablizing cleaning, carry out periodic flushing replacement and keep away
Exempt from deposition, blocking, increases the workload inspected periodically, cleaned.
Furnace bottom sealing can bring very serious harm once going wrong.For example, causing a large amount of cold airs from furnace bottom bottom
Into the exhaust gas volumn for generation of burning in furnace surges, and increases the quiet power output of air-introduced machine.For another example, because a large amount of cold airs enter, make in furnace
Temperature levels decline is very fast, and load decline, radiative heat transfer weakens, and leads to unstable combustion, combustion chamber draft fluctuation, even
Boiler flameout is caused, unit safety and economical operation are seriously affected.
Currently, the seal form cancels original sealed cistern, sealing water supplies in the prior art there is also a kind of flexible sealing
Water system cancels dust block board and sealing plug-in board.Metal framework is done using heat resisting steel, the upper half is welded on the connection of water-cooling wall lower end
On angle steel, lower half is welded at the top of slag well on junction steel plate, connection inside deflector on the inside of the upper half, lower half connection outside
Bolt hole is opened in deflector, outside, installs nonmetallic composite layer, interior filling with insulation material.Although there are many excellent for the flexible sealing
Point, but there are still some problems, for example, flexible sealing baffle up to several meters, more than ten meters of deflector under difference variation due to
Expansion squeezes, and deformation, bending occurs, and upper chin spoiler lap gap increases, high temperature cigarette wind and lime-ash enter thermal insulation layer；Through
Heat-barrier material, hot wind lead to the aging of flexible sealing covering, embrittlement, and the sealing effect of organic gel and organic material is good, but the resistance to temperature difference,
It fails rapidly under the conditions of 700,800 DEG C of hot winds, causes hot wind, lime-ash leakage, sealing failure.
Utility model content
To solve the easy dilatancy of sealing device present in the sealing device of existing Boiler Furnace bottom, dust easily enters sealing water
The technical issues of slot causes sink to block, and leads to water seal water-supply shortages, the utility model provide a kind of for furnace bottom sealing
Dust block board, the technical solution taken is as follows:
A kind of dust block board for furnace bottom sealing, the dust block board include being fixed on 7 bottom angle cleat 1 of water-cooling wall lower collecting box
On segmented dust block board 30, cover between the adjacent segmented dust block board 30 cover board 32 in gap 33 and be fixed on described point
Compensation dust block board 6 between segmentation dust block board 30 and sealed cistern gap；The compensation dust block board 6 includes connecting plate 62 and gold
Belong to tow 61；The connecting plate 62 includes vertical plane and bending side, and vertical plane connects by the way that the side wall of bolt and sealed cistern is fixed
It connects；The wire bundle 61 is set to the bottom of bending side, and the end of wire bundle 61 and the side of segmented dust block board 30 are pressed
It connects；Multiple segmented dust block boards 30 are enclosed with multiple cover boards 32 to be connect the sealing of burner hearth 90 and slag well 91 and falls grey sky
Between.
Preferably, the compensation dust block board 6 further includes clamping plate 63, and clamping plate 63 is installed on the vertical plane of the connecting plate 62
Outside is bolted and connecting plate 62 is clipped between sealed cistern side wall and clamping plate 63.
Preferably, the bottom of the segmented dust block board 30 is equipped with the bending side bent towards sealed cistern lower sidewall
31。
It is highly preferred that the bending side 31 is 7~15mm at a distance from sealed cistern side wall.
Preferably, the segmented dust block board 30 is flat or curved plate type structure, the length of segmented dust block board 30
Or span is 1.5~2.0m.
Preferably, the width in the gap 33 is 5~8mm.
It is highly preferred that cover board 32 is covered on the gap 33, and side and the side of segmented dust block board 30 are fixed, separately
Side is overlapped across gap 33 and with adjacent sectional formula dust block board 30.
Another object of the present invention is to provide a kind of sealing structures containing any dust block board, and the sealing structure is also
Including water seal plate 2, angle cleat 1 and seal water system 4；The seal water system includes sealed cistern and supplies water for sealed cistern
Water supply line 5；The sealed cistern is fixedly installed in the top of slag well 91；The angle cleat is fixedly installed in the water-cooling wall second line of a couplet
The bottom of case 7；The medial surface of the angle cleat 1 is fixedly connected with the top of segmented dust block board 30, and lateral surface and water seal are inserted
The top of plate 2 connects；The lower end surface of the water seal plate 2 is inserted into the water surface in sealing pond or less.
Compared with the existing technology, the utility model obtain the utility model has the advantages that
1. using segmented dust block board, gap is set between adjacent sectional formula dust block board, and cover board is set on gap,
The uneven brought stress of water-cooling wall expansion can be effectively eliminated, so that the deformation of dust block board, bending are avoided, it is curved at closing in
Folded structure can be effectively reduced dust inlet, reduce particulate matter inlet；
2. by being arranged compensation wire bundle dust block board, wire bundle effectively solves dust block board irregular deformation, relatively
The larger problem in gap in motion process between dust block board, prevents bulky grain lime-ash and enters seal water system, limit to greatest extent
Flying dust processed enters water sealed tank, guarantees that sealing water flows smoothly, and greatly prolongs water seal service life and operation stability；
3. traditional water seal is forced to take the side of flexible sealing because sealing water can not be solved into the contaminated problem of lime-ash
Formula, but without solving the problems, such as substantially, the deflector (dust block board) of flexible sealing is easily deformed, hot wind, lime-ash are largely leak into,
Covering service life is greatly reduced, the segmented dust block board (deflector), compensation wire bundle gray screen structure can be used in and pass
System sealing structure for water, it is also possible in flexible sealing structure, effectively lime-ash be prevented to permeate, reduce hot wind wind speed；
4. segmented dust block board is used cooperatively with compensation tow dust block board, the bending at the bottom closing in of segmented dust block board
Structure can reduce the dust for largely entering gap by gas flow-disturbing, meanwhile, the bending structure of the connecting plate of compensation dust block board
Further block the dust for entering gap by sheer good luck.Further, due to wire bundle and segmented dust block board contact position
At dust and sealed cistern moisture, bonding is easy after steam and dust contact, then because of further hardened be segmented of being heated
The medial surface of formula dust block board.When longitudinally opposite movement occurs for compensation dust block board and segmented dust block board, wire bundle can
Play the role of steel brush, the hardened dust on segmented compensating plate of automated cleaning.Dust can be mended after being scraped along segmented
The vertical plane and bending side for repaying plate slide into burner hearth.The set-up mode can when furnace bottom sealing device have certain automatically cleaning function
Can, on the one hand can effectively avoid dust and enter in sealed cistern along sealed cistern and dust block board gap prevents dust from blocking water
On the other hand slot can also extend maintenance period by self-cleaning function, reduce repair rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing typical furnace bottom seal water system.
Fig. 2 is the structural schematic diagram of furnace bottom seal water system in a kind of preferred embodiment of the utility model.
Fig. 3 is the partial enlargement structural representation at Fig. 2 virtual coil.
Fig. 4 is the structural schematic diagram of adjacent dust block board junction in a kind of preferred embodiment of the utility model.
Fig. 5 be Fig. 4 along A to schematic cross-sectional view.
In figure: 1, angle cleat；2, water seal plate；3, dust block board；4, seal water system；5, water supply line；6, compensation gear
Hawk；7, water-cooling wall lower collecting box；8, water-cooling wall；30, segmented dust block board；31, bending side；32, cover board；33, gap；61, gold
Belong to tow；62, connecting plate；63, clamping plate；90, burner hearth；91, slag well.
Specific embodiment
Following embodiment material therefor, method and instrument, without specified otherwise, be this field conventional material, method and
Instrument, those of ordinary skill in the art can be obtained by commercial channel.
The utility model in following description, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper",
The indicating positions such as "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outside" and " endways " or positional relationship are base
In orientation or positional relationship shown in the drawings, be merely for convenience of describing the present invention and simplifying the description, rather than indicate or
Imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, it is thus impossible to be interpreted as
Limitations of the present invention.
The utility model in following description, it should be noted that unless otherwise expressly provided with limit, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be and be directly connected to, be also possible to be indirectly connected with by intermediate medium, can be the connection of two components interiors.It is right
For those skilled in the art, can be concrete condition understand submit a written statement to a higher authority term in the present invention specifically contain
Justice.
In addition, the utility model in following description, unless otherwise indicated, " multiple ", " multiple groups ", the meaning of " more "
It is two or more.
The utility model is described in further details with reference to the accompanying drawing, but following detailed description is not intended as to originally practical
Novel restriction.
Fig. 2 is the structural schematic diagram of furnace bottom seal water system in a kind of preferred embodiment of the utility model.Fig. 3 is Fig. 2 virtual coil
The partial enlargement structural representation at place.From Fig. 2 and Fig. 3 it is found that furnace bottom sealing structure is installed between burner hearth 90 and slag well 91, packet
It includes seal water system 4, water seal plate 2, segmented dust block board 30, compensation dust block board 6 and is installed on 7 lower part of water-cooling wall lower collecting box
Angle cleat 1.Multiple segmented dust block boards 30, the multisection type have been bolted to connection in the medial surface of angle cleat 1
Dust block board can enclose the shapes such as rectangular, cylindrical or regular polygon.Which kind of specific shape, those skilled in the art are according to reality
Demand determines.The bottom of segmented dust block board 30 is equipped with the bending side 31 bent to sealed cistern bottom, the bending side 31
With at a distance from sealed cistern be 10mm.It is equipped with and is installed on sealed cistern side wall between segmented dust block board 30 and sealed cistern
The compensation dust block board 6 in portion.In this embodiment, compensation dust block board 6 include two clamping plates 63, a connecting plate 62 with
And a branch of wire bundle 61.Wherein, connecting plate 62 divides for vertical plane and bending side, and vertical plane is clamped and passed through by two clamping plates 63
Clamping plate 63 and connecting plate 62 are fixed on sealed cistern side wall by bolt together.The bending side bottom of connecting plate 62 is connected with metal
Tow 61.61 end of wire bundle is crimped with the medial surface of segmented dust block board 30, is pressed by wire bundle 61 in segmented
The entrance of blocks dust on dust block board 30.
Fig. 4 is the structural schematic diagram of adjacent dust block board junction in a kind of preferred embodiment of the utility model.Fig. 5 is figure
4 along A to schematic cross-sectional view.From Fig. 4 and Fig. 5 it is found that there are gap 33, gaps between adjacent segmented dust block board
33 width is generally 5~8mm.Enter for dust at mode gap 33, the outside in gap 33 is equipped with cover board 32.Cover board 32 is complete
Gap 33 is covered, and one end is fixed with a segmented dust block board, the other end is across point behind gap 33 with the other side
Segmentation baffle overlap joint, in order to which cover board 32 remains to cover in gap 33 when displacement as arrows in fig. 5 occurs.
In use, high temperature dust and the dirty sector-meeting to fall off by coefficient of expansion difference are from burner hearth through the sealing structure
It drops into slag well 91.Because of flow perturbation, inevitably has dust and entered by the gap between bending side 31 and sealed cistern
The downside of compensation dust block board 6.And the tilting of bending curved surface and the wire bundle composition of the connecting plate 62 of compensation dust block board 6
Blocking surface can effectively stop most dusts entered herein.Due to the blocking of the inclined surface, most of dust meeting
It is blocked in the space.Though there is few part dust through wire bundle metal, the steam of sealed cistern can be with dust phase
It meets and is adhered on the lateral surface of segmented dust block board 30.Upper bottom occurs in segmented dust block board 30 and compensation dust block board 6
When the relative motion set, wire bundle 61 can play the role of brush, scrape the black dirt being adhered on segmented dust block board 30, should
Black dirt can the side of segmented formula dust block board 30 fall and dropped into slag well 91 along bending side 31.The furnace bottom of this setup
Sealing structure has certain self-cleaning function, can significantly extend the maintenance period of sealing structure, reduces repair rate.Together
When, wire bundle and the setting in gap 33 can effectively discharge because the coefficient of expansion it is different caused by torsional deformation stress, keep away
Exempt from sealing structure to be distorted deformation.
Although the utility model has been disclosed in the preferred embodiment as above, it is not intended to limit the utility model, and is appointed
What person skilled in the art can do various changes and modification, therefore without departing from the spirit and scope of the utility model
The protection scope of the utility model should subject to the definition of the claims.
Claims (8)
1. a kind of dust block board for furnace bottom sealing, which is characterized in that including being fixed on water-cooling wall lower collecting box (7) bottom joint angle
The cover board (32) in gap (33) between segmented dust block board (30), the adjacent segmented dust block board (30) of covering on steel (1)
And the compensation dust block board (6) being fixed between the segmented dust block board (30) and sealed cistern gap；The compensation gear ash
Plate (6) includes connecting plate (62) and wire bundle (61)；The connecting plate (62) includes vertical plane and bending side, and vertical plane passes through
Bolt is fixedly connected with the side wall of sealed cistern；The wire bundle (61) is set to the bottom of bending side, and wire bundle (61)
End crimped with the side of segmented dust block board (30)；Multiple segmented dust block boards (30) and multiple cover boards (32) enclose
The sealing for forming connection burner hearth (90) and slag well (91) falls Transitional Space.
2. a kind of dust block board for furnace bottom sealing according to claim 1, which is characterized in that the compensation dust block board
It (6) further include clamping plate (63), clamping plate (63) is installed on the outside of the vertical plane of the connecting plate (62), and being bolted will connect
Plate (62) is clipped between sealed cistern side wall and clamping plate (63).
3. a kind of dust block board for furnace bottom sealing according to claim 1, which is characterized in that the segmented dust block board
(30) bottom is equipped with the bending side (31) bent towards sealed cistern lower sidewall.
4. it is according to claim 3 it is a kind of for furnace bottom sealing dust block board, which is characterized in that the bending side (31) with
The distance of sealed cistern side wall is 7~15mm.
5. a kind of dust block board for furnace bottom sealing according to claim 1, which is characterized in that the segmented dust block board
It (30) is flat or curved plate type structure, the length or span of segmented dust block board (30) are 1.5~2.0m.
6. a kind of dust block board for furnace bottom sealing according to claim 1, which is characterized in that the width of the gap (33)
Degree is 5~8mm.
7. a kind of dust block board for furnace bottom sealing according to claim 6, which is characterized in that cover board (32) is covered in institute
State on gap (33), and side and the side of segmented dust block board (30) are fixed, the other side across gap (33) and with adjacent point
Segmentation dust block board (30) overlap joint.
8. a kind of sealing structure containing any dust block board of claim 1-7, which is characterized in that further include water seal plate
(2), angle cleat (1) and seal water system (4)；The seal water system includes sealed cistern and the water supplying pipe for sealed cistern water supply
Road (5)；The sealed cistern is fixedly installed in the top of slag well (91)；The angle cleat is fixedly installed in water-cooling wall lower collecting box
(7) bottom；It is fixedly connected at the top of the medial surface of the angle cleat (1) and segmented dust block board (30), lateral surface and water
Seal the top connection of plate (2)；The lower end surface of the water seal plate (2) is inserted into the water surface in sealing pond or less.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920040198.4U CN209655264U (en) | 2019-01-10 | 2019-01-10 | A kind of dust block board and its sealing structure for furnace bottom sealing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920040198.4U CN209655264U (en) | 2019-01-10 | 2019-01-10 | A kind of dust block board and its sealing structure for furnace bottom sealing |
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| CN209655264U true CN209655264U (en) | 2019-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539225A (en) * | 2019-01-10 | 2019-03-29 | 锐驰恩科技（大连）有限公司 | A kind of dust block board and its sealing structure for furnace bottom sealing |
-
2019
- 2019-01-10 CN CN201920040198.4U patent/CN209655264U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539225A (en) * | 2019-01-10 | 2019-03-29 | 锐驰恩科技（大连）有限公司 | A kind of dust block board and its sealing structure for furnace bottom sealing |
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