CN106224946A - A kind of wear-resistance circulation fluidized bed boiler - Google Patents
A kind of wear-resistance circulation fluidized bed boiler Download PDFInfo
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- CN106224946A CN106224946A CN201610829482.0A CN201610829482A CN106224946A CN 106224946 A CN106224946 A CN 106224946A CN 201610829482 A CN201610829482 A CN 201610829482A CN 106224946 A CN106224946 A CN 106224946A
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- abrasionproof beam
- abrasionproof
- road
- water
- cooling wall
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- 238000001816 cooling Methods 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 230000007704 transition Effects 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000000839 emulsion Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 10
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 14
- 239000008187 granular material Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005507 spraying Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 14
- 238000010276 construction Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 239000011343 solid material Substances 0.000 description 4
- 210000000038 chest Anatomy 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a kind of wear-resistance circulation fluidized bed boiler, including water-cooling wall, emulsion zone, transition region and dilute-phase zone, described water-cooling wall surface spraying has wear-resistant coating, water-cooling wall uses water screen tube and fin to connect and is formed, water-cooling wall is provided with bitch and abrasionproof beam, and bitch is connected on fin, and described abrasionproof beam is layed on bitch and is coated with bitch, abrasionproof beam is close to bitch and water screen tube, and abrasionproof beam also has guiding slope；Also including being located at the wearing plate on water-cooling wall in transition region, wearing plate is connected with fin by groove tube.In the present invention, abrasionproof beam and wearing plate make the cluster of grains of burner hearth surrounding near wall region in boiler reduce flow velocity, and the slope that guides in abrasionproof beam makes the granule of burner hearth surrounding near wall region reduce, therefore both significantly reduce speed and the concentration of burner hearth sticking wall flow, significantly reduce the abrasion of water screen tube；Meanwhile, the slideway of wearing plate also to granule away from water-cooling wall, drop down onto abrasionproof beam, then fall the effect serving guiding along abrasionproof beam.
Description
[technical field]
The present invention relates to Sector of Cfb Boilers, be specifically related to a kind of wear-resistance circulation fluidized bed boiler.
[background technology]
Technology of Circulating Fluidized Bed Boiler is a kind of efficient, clean-burning technology.The fluidizing velocity of CFBB is high,
And due to turbulent flow strong in bed and Matter Transfer, strengthen the mixing of fuel and extend the fuel time of staying in burner hearth,
Therefore there is higher efficiency of combustion, its at low load can stable operation, and without increasing auxiliary fuel.Recirculating fluidized bed pot
Stove can also use inferior fuel, has that boiler load modulability is good, lime-ash is prone to the advantages such as comprehensive utilization, therefore, in China
Nearly more than ten years are developed rapidly and popularization and application.
But in CFBB, the concentration of solid material is huge, generally up to the tens of coal-powder boiler times to up to a hundred
Times, and flue gas flow rate is big, and granule is hard and corner angle sharp-pointed, thus under the drive of high velocity smoke, to circulating fluid bed boiler
The erosive wear at the heating surface positions such as thorax top, Hou Qiang, one-level evaporation tube upper collecting chamber vertical duct is the most serious；Especially on revetment top
Position, portion, due to emulsion zone marginal zone at position, not only by serious high-speed high-concentration containing bed, the strong punching of fuel gas stream
Brush, abrasion, and there is serious eddy current effect, cutting effect and centrifugal action.Boiler furnace water-cooling wall heavy wear is main
Show as following several situation:
1, burner hearth emulsion zone pouring material and the abrasion of water screen tube juncture area tube wall: due to dirty along wall in transition region
Solid material and stove in the movement of solid material that moves upward in opposite direction, thus produce vortex flow in local, simultaneously along stove
The dirty solid material in bore wall face produces the change of flow direction at juncture area, produces water screen tube and washes away.
2, the abrasion of burner hearth corner water-cooling wall: this is to make owing to the material concentration of sticking wall flow is higher in burner hearth four angular zone
Become.
3, the abrasion of furnace outlet two side water wall tube: the abrasion of furnace roof heating surface is being left mainly due to gas, solid stream
Burner hearth flows to change when entering turning flue, gas, the constriction in flow area of solid stream, thus results in the abrasion to two side pipe
Strengthen.
4, the abrasion of irregular tube wall: irregular tube wall includes the bend pipe at wall pipe, opening furnace walls, the weld seam on tube wall
Deng.This sticking wall flow being primarily due to irregular position is changed, and easily forms eddy current, thus causes the generation of abrasion.
In terms of flow dynamic characteristic, boiler hearth of circulating fluidized bed is in fast fluidized condition.In recirculating fluidized bed,
Burner hearth surrounding near wall region also exists the substantial amounts of cluster of grains (hereinafter referred to as sticking wall flow) flowed downward, and sticking wall flow is along nearly 30m
High burner hearth accelerates flowing from furnace roof to furnace bottom, and its tip speed is higher, and concentration exponentially increases.Sticking wall flow speed is high
It it is greatly the main cause causing water-cooling wall transitional region serious wear with concentration.
[summary of the invention]
The goal of the invention of the present invention is: for the problem of above-mentioned existence, it is provided that a kind of wear-resistance circulation fluidized bed boiler stove
Thorax, to alleviate the abrasion of water-cooling wall.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of wear-resistance circulation fluidized bed boiler, including water-cooling wall, emulsion zone, transition region and dilute-phase zone, described water-cooling wall table
Face is coated with wear-resistant coating, and described water-cooling wall uses water screen tube and fin to connect and formed, described water-cooling wall be provided with bitch and
Abrasionproof beam, described bitch is connected on described fin, and described abrasionproof beam is layed on described bitch and is coated with described bitch, described
Abrasionproof beam is close to described bitch and described water screen tube, and described abrasionproof beam also has for changing material particles flow direction
Guide slope；
Described wear-resistance circulation fluidized bed boiler also includes being located at the wearing plate on water-cooling wall in transition region, and described wearing plate leads to
Crossing groove tube to be connected with described fin, described groove tube is located in described transition region on the fin above abrasionproof beam, described wear-resisting
The bottom of plate is connected with the abrasionproof beam in described transition region.
Further, the abrasionproof beam on described water-cooling wall includes first abrasionproof beam, second abrasionproof beam, the 3rd road abrasionproof
Beam, the 4th road abrasionproof beam, the 5th road abrasionproof beam, the 6th road abrasionproof beam and the 7th road abrasionproof beam, described first abrasionproof beam, second
Road abrasionproof beam, the 3rd road abrasionproof beam, the 4th road abrasionproof beam, the 5th road abrasionproof beam, the 6th road abrasionproof beam and the 7th road abrasionproof beam from
Under supreme spaced apart, at the castable closing in that described first abrasionproof beam is installed in stove, described second abrasionproof beam and institute
The spacing stating first abrasionproof beam is 2000mm；Described 3rd road abrasionproof beam with the spacing of described second abrasionproof beam is
3000mm, described 4th road abrasionproof beam is 4000mm with the spacing of described 3rd road abrasionproof beam, described 5th road abrasionproof beam and institute
The spacing stating the 4th road abrasionproof beam is 5000mm, and described 6th road abrasionproof beam with the spacing of described 5th road abrasionproof beam is
6000mm, described 7th road abrasionproof beam is 7000mm with the spacing of described 6th road abrasionproof beam.
Further, the cross sectional shape of described abrasionproof beam is half trapezoidal.
Further, described abrasionproof depth of beam is 140-160mm, and width is 80-100mm.
Further, to be carborundum moldable for the material of described abrasionproof beam, wearing plate and groove tube.
Further, the thickness of described wear-resistant coating is 2-5mm.
Further, described abrasionproof beam near the surface of water-cooling wall more described abrasionproof beam away from the low 1-in surface of water-cooling wall
2mm, so that the granule fallen on abrasionproof beam is risen cushioning effect, prevents abrasionproof beam from damaging after using a period of time, increases abrasionproof beam
Service life.
Further, described bitch is " V " shape, a diameter of 8mm.
Further, the side that described wearing plate and water-cooling wall are close to is provided with the groove that the external diameter with water screen tube matches
And the protuberance matched with groove tube, opposite side is the slideway tilted.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
(1) start with from abrasion mechanism, due to the fact that and be provided with abrasionproof beam and wearing plate, abrasionproof beam and wearing plate common
Effect makes the cluster of grains of burner hearth surrounding near wall region in boiler encounter stop during declining, and reduces the flow velocity of granule, and
The guiding slope having due to abrasionproof beam, changes the flow direction of partial particulate, causes the granule of burner hearth surrounding near wall region to reduce,
Therefore abrasionproof beam and wearing plate significantly reduce speed and the concentration of burner hearth sticking wall flow, significantly reduce the abrasion of water screen tube；
Meanwhile, the slideway of wearing plate also to granule away from water-cooling wall, drop down onto abrasionproof beam, then fall the work serving guiding along abrasionproof beam
With.
(2) the abrasionproof beam of the present invention is overall laying when laying, and there is not gap problem, and be in operation the probability come off
Less, operational reliability is high, if checking after blowing out and finding that abrasionproof beam has cracking or the place come off, is purged it laggard
Row recovers, and wearing plate is arranged by removably, and after using certain time limit, it cannot be avoided its cracking or come off
Deng time, can pull down replacing or repair recover, safeguard simple and convenient.
(3) in boiler design, although the heating surface of the design of the boiler of certain capacity is constant, according to theory meter
Calculate, in boiler furnace, on water-cooling wall, install abrasionproof beam and wearing plate additional, the heating surface in boiler furnace will be reduced, but owing to laying
The material that abrasionproof beam and wearing plate use is the wearing-proof refractory material of high-termal conductivity, so installing anti-in Boiler Furnace on water-cooling wall
After mill beam, boiler furnace heat transfer is not affected.
(4) install simple and convenient, installing abrasionproof beam and during wearing plate, it is not necessary to boiler water wall pipe is changed
Make, it is only necessary to weld on fin and on abrasionproof beam bitch and transition region water-cooling wall, weld groove tube, running into the ground having abrasionproof platform
Side, again welds bitch, restores it during abrasionproof beam to be laid after the part castable of abrasionproof platform being purged.
[accompanying drawing explanation]
Fig. 1 is the water-cooling wall part-structure schematic diagram of the embodiment of the present invention；
Fig. 2 is abrasionproof beam and the schematic cross-section of wearing plate in the embodiment of the present invention；
Fig. 3 is the top view of wearing plate in the embodiment of the present invention.
In accompanying drawing: 1-emulsion zone, 2-transition region, 3-dilute-phase zone, 4-water screen tube, 5-fin, 6-abrasionproof beam, 7-guides
Slope, 8-wearing plate, 9-groove tube, 10-groove, 11-protuberance, 12-slideway, 13-bitch.
[detailed description of the invention]
Below in conjunction with specific embodiment, the present invention is further illustrated, but is not limitation of the invention.
Embodiment:
A kind of wear-resistance circulation fluidized bed boiler boiler, including water-cooling wall, emulsion zone 1, transition region 2 and dilute-phase zone 3, such as Fig. 1
Shown in Fig. 2, described water-cooling wall is connected by water screen tube 4 and fin 5 and is formed, and described water-cooling wall surface spraying has thickness to be 2-
The wear-resistant coating of 5mm, described water-cooling wall is provided with the bitch 13 of " V " shape and cross section is half trapezoidal abrasionproof beam 6, and bitch 13 welds
On fin, abrasionproof beam 6 is laid on bitch 13 and is coated with bitch 13, and the height of the abrasionproof beam 6 laid is 140-160mm,
Width is 80-100mm.Described abrasionproof beam 6 is close to bitch 13 and water screen tube 4, and abrasionproof beam 6 also has for changing granule side
To guiding slope 7.
Meanwhile, in order to further up to abrasionproof effect, the present invention also wearing plate 8 in transition region 2, wearing plate in burner hearth
The top view of 8 is as it is shown on figure 3, described wearing plate 8 is connected with described fin 5 by groove tube 9, and described groove tube 9 is welded in institute
State in transition region 2 on the fin 5 above abrasionproof beam 6, be connected with the abrasionproof beam 6 in described transition region 2 bottom wearing plate 8.Described
The side that wearing plate 8 and water-cooling wall are close to is provided with groove 10 that the external diameter with water screen tube 4 matches and matches with groove tube 9
Protuberance 11, make wearing plate 8 fully be close to water screen tube 4 and groove tube 9.Wearing plate 8 away from the side of water-cooling wall for inclining
Oblique slideway 12, makes the granule of decline slip away water-cooling wall along slideway 12, is effectively protected water-cooling wall.And groove tube 9 upper end
Opening, lower end seal, for installation and the dismounting of wearing plate 8.
In the present embodiment, the abrasionproof beam 6 on described water-cooling wall include first abrasionproof beam, second abrasionproof beam,
Three road abrasionproof beams, the 4th road abrasionproof beam, the 5th road abrasionproof beam, the 6th road abrasionproof beam and the 7th road abrasionproof beam, described first is prevented
Mill beam, second abrasionproof beam, the 3rd road abrasionproof beam, the 4th road abrasionproof beam, the 5th road abrasionproof beam, the 6th road abrasionproof beam and the 7th road
Abrasionproof beam is the most spaced apart, and at the castable closing in that described first abrasionproof beam is installed in stove, described second is prevented
Mill beam is 2000mm with the spacing of described first abrasionproof beam；Described 3rd road abrasionproof beam and the spacing of described second abrasionproof beam
For 3000mm, described 4th road abrasionproof beam is 4000mm with the spacing of described 3rd road abrasionproof beam, described 5th road abrasionproof beam with
The spacing of described 4th road abrasionproof beam is 5000mm, and described 6th road abrasionproof beam with the spacing of described 5th road abrasionproof beam is
6000mm, described 7th road abrasionproof beam is 7000mm with the spacing of described 6th road abrasionproof beam.
The material that abrasionproof beam 6 is used is that highly-conductive hot carbon SiClx is moldable, and bitch 13 uses the 1Cr25Ni20Si2 of φ 8mm
Material makes, and the welding rod that welding bitch 13 uses is A402 stainless steel electrode, and bitch 13 is welded on the fin 5 of water-cooling wall
Time, the coating of original abrasionproof spraying to be polished off, and expose original mother metal.
The construction method step of the present invention a kind of wear-resistance circulation fluidized bed boiler boiler is:
(1) by arrangement and method for construction requirement, start to weld bitch 13 at burner hearth former castable closing in, first abrasionproof beam is pacified
Being loaded on this, this is using the datum mark (bitch 13 has welded foot) as whole boiler wear resistant beam construction.
(2), after having completed foot fixed point, use horizontal tube, burner hearth four sides wall is found out each burner hearth metope starting point.Every wing furnace thorax
Water screen tube metope carries out line with stock scale by adjacent 2, at each water-cooling wall after utilizing horizontal tube to find out 3-5 point
Guan Shangyong marking pen scores marks, and uses each by the bitch 13 of burner hearth front-back wall and both walls per pass abrasionproof beam of same procedure
Point carries out labelling.
(3) carry out the welding of bitch 13 after completing every one bitch 13 fixed point, use and bitch 13 material when bitch 13 welds
The wlding that matter matches.Weld V-type bitch 13 by abrasionproof beam arrangement and method for construction requirement during welding, when bitch 13 welds, require righting,
Welding on request of angled requirement, welding and assembling height requires, not less than 4, to clear up welding slag.Bitch 13 has welded, collaborative
Person skilled carries out hidden project inspection examination, and undesirable solder joint carries out repair welding, clears up welding slag.
(4) carrying out abrasionproof beam 6 inner lining structure after bitch 13 acceptance(check) to install, abrasionproof beam 6 uses high-strength abrasion-proof carbonization
The moldable manual ramming of silicon forms, and work progress may utilize stock chi, cutting knife, son, self-made tool etc., makes abrasionproof beam 6 structure
Meet the requirements.
(5) pressing moldable construction requirement by closely knit for moldable for carborundum manual ramming on bitch 13, thickness requirement is basic
Reach the stock chi being consistent with thickness with self-control after design requires, be close to water screen tube 4 and moldable surface is cut flat with, the use of concave surface
Moldable filling-in, then cuts flat with whole by the moldable surface cut flat with by abrasionproof beam 6 upper surface by stock chi, and upper surface is in the mistake cut
Cheng Zhong, should be more lower slightly at agio cold wall pipe, and it is closely knit to be close to the moldable finishing of water screen tube, finally construction abrasionproof beam most critical
Position----guiding slope 7, during construction, arrangement and method for construction requires size from suitable for reading measuring downwards, afterwards with stock chi inclined-plane by plastic slope
Cut out, and slope is repaired smooth, smooth with son, finally by the moldable abrasionproof beam 6 formed and water screen tube 4 seam
Each is both needed to repair, and makes abrasionproof beam 6 and water screen tube 4 combine closely and (should ensure that moldable surface light during construction at this
Clean, smooth, abrasionproof beam 6 is tight with water screen tube 4 interface, prevents boiler operatiopn from washing away formation eddy current, thus cause abrasionproof beam 6 and
Water-cooling wall pipe of burner hearth 4 concentrated wear).
(6) in like manner, groove tube 9 is welded in transition region 2 (four perisporiums of water-cooling wall on the fin 5 above abrasionproof beam 6
In, the groove tube 9 that each perisporium is welded is 3-5), then wearing plate 8 is directly plugged in groove tube 9, make wear-resisting
Plate 8 is positioned at the top of abrasionproof beam 6 in transition region 2 and is attached thereto.Groove tube 9 and wearing plate 8 castable the most in advance.
Points for attention in work progress are:
(1) before welding bitch 13 on fin 5, it is desirable to fin 5 sprayed coating is polished off, exposes mother metal rear solderable.
(2) abrasionproof beam 6 does not allow to disconnect because of any reason, as do not staggered, and can be according to field condition as one sees fit by whole
Move or move down on road abrasionproof beam.
(3) abrasionproof beam 6 upper surface requires smooth, described abrasionproof beam upper surface near the side ratio of water-cooling wall away from water-cooling wall
The low 1-2mm in side, so that the granule fallen on abrasionproof beam is played cushioning effect, prevent abrasionproof beam from using after a period of time and damage,
Increase the service life of abrasionproof beam.
(4) after in stove, all welding jobs terminate, before the water pressure test and scaffold are removed, it is desirable to all in checking stove comprehensively
Heating surface, the various weld seams of the outer fume side of wearing layer require to polish, and weld seam residual altitude is not more than 1mm, is more not allow for foreign body.
(5) bitch 13 and groove tube 9 do not allow to injure water screen tube 4 when welding, and welding meets the provisions of the relevant regulations issued by the State, welding
Firmly.
(6) abrasionproof beam 6 and wearing plate 8 should be tightly combined with water screen tube 4, do not allow to there is the most penetrating gap.
(7) every one abrasionproof beam 6 requires moldable smooth surface, straight when constructing, and constructs from top to bottom, can prevent during construction
Only secondary cleaning.
After installation, boiler is accumulative runs 6 months, and on water-cooling wall pipe of burner hearth 4, random (the most uniform) is taken out
Looking into, every 3 meters high are done the comparison and detection of water-cooling wall change before and after abrasionproof is implemented as a check surface, find 99% selective examination point (water
Cold wall) contrast the thickness thinning before abrasionproof is implemented less than 0.2mm.After installation, boiler is accumulative runs 1 year, at furnace water cooling
Random (the most uniform) selective examination on wall pipe 4, every 3 meters high are done water-cooling wall change before and after abrasionproof is implemented as a check surface
The comparison and detection changed, it is again seen that the thickness thinning before 99% selective examination point (water-cooling wall) contrast abrasionproof is implemented is less than 0.5mm.
Above-mentioned testing result shows, installs abrasionproof beam additional and wearing plate does after abrasionproof processes, the abrasion journey of water-cooling wall of the present invention
Degree is greatly improved, and illustrates that the common effect of abrasionproof beam and wearing plate largely reduces the cluster of grains pair of decline
The abrasion of water-cooling wall.
Described above is the detailed description for the preferable possible embodiments of the present invention, but embodiment is not limited to this
Bright patent claim, the equal change completed under the technical spirit suggested by all present invention or modification change, all should belong to
In the contained the scope of the claims of the present invention.
Claims (9)
1. a wear-resistance circulation fluidized bed boiler, including water-cooling wall, emulsion zone, transition region and dilute-phase zone, described water-cooling wall surface
Being coated with wear-resistant coating, described water-cooling wall uses water screen tube and fin to connect and is formed, it is characterised in that set on described water-cooling wall
Having bitch and abrasionproof beam, described bitch is connected on described fin, and described abrasionproof beam is layed on described bitch and is coated with described
Bitch, described abrasionproof beam is close to described bitch and described water screen tube, described abrasionproof beam is also had for changing material particles
The guiding slope of flow direction；
Described wear-resistance circulation fluidized bed boiler also includes being located at the wearing plate on water-cooling wall in transition region, and described wearing plate is by recessed
Barrel is connected with described fin, and described groove tube is located in described transition region on the fin above abrasionproof beam, described wearing plate
Bottom is connected with the abrasionproof beam in described transition region.
Wear-resistance circulation fluidized bed boiler the most according to claim 1, it is characterised in that the abrasionproof Liang Bao on described water-cooling wall
Include first abrasionproof beam, second abrasionproof beam, the 3rd road abrasionproof beam, the 4th road abrasionproof beam, the 5th road abrasionproof beam, the 6th road abrasionproof
Beam and the 7th road abrasionproof beam, described first abrasionproof beam, second abrasionproof beam, the 3rd road abrasionproof beam, the 4th road abrasionproof beam, the 5th
Road abrasionproof beam, the 6th road abrasionproof beam and the 7th road abrasionproof beam are the most spaced apart, and described first abrasionproof beam is installed on stove
At interior castable closing in, described second abrasionproof beam is 2000mm with the spacing of described first abrasionproof beam；Described 3rd road
Abrasionproof beam is 3000mm with the spacing of described second abrasionproof beam, between described 4th road abrasionproof beam and described 3rd road abrasionproof beam
It is 5000mm away from the spacing for 4000mm, described 5th road abrasionproof beam and described 4th road abrasionproof beam, described 6th road abrasionproof beam
Being 6000mm with the spacing of described 5th road abrasionproof beam, described 7th road abrasionproof beam with the spacing of described 6th road abrasionproof beam is
7000mm。
Wear-resistance circulation fluidized bed boiler the most according to claim 1, it is characterised in that the cross sectional shape of described abrasionproof beam is
Half is trapezoidal.
Wear-resistance circulation fluidized bed boiler the most according to claim 1, it is characterised in that described abrasionproof depth of beam is 140-
160mm, width is 80-100mm.
Wear-resistance circulation fluidized bed boiler the most according to claim 1, it is characterised in that described abrasionproof beam, wearing plate and recessed
It is moldable that the material of barrel is carborundum.
Wear-resistance circulation fluidized bed boiler the most according to claim 1, it is characterised in that the thickness of described wear-resistant coating is 2-
5mm。
Wear-resistance circulation fluidized bed boiler the most according to claim 1, it is characterised in that described abrasionproof beam is near water-cooling wall
Surface more described abrasionproof beam is away from the low 1-2mm in surface of water-cooling wall.
Wear-resistance circulation fluidized bed boiler the most according to claim 1, it is characterised in that described bitch is " V " shape, a diameter of
8mm。
Wear-resistance circulation fluidized bed boiler the most according to claim 1, it is characterised in that described wearing plate and described water-cooling wall
The side connected is provided with the groove that the external diameter with described water screen tube matches and the protuberance matched with groove tube, described resistance to
Nog plate is the slideway tilted away from the side of described water-cooling wall.
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| CN110582670A (en) * | 2017-03-03 | 2019-12-17 | 住友重工福威能源有限公司 | Water panel section and method for manufacturing water panel section in fluidized bed reactor |
| CN111043589A (en) * | 2019-12-31 | 2020-04-21 | 哈尔滨科能熔敷科技有限公司 | Flow guide beam and method for reducing abrasion of wall-attached wind of water-cooled wall of boiler |
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|---|---|
| CN106224946B (en) | 2018-10-30 |
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