CN205227300U - Modified fluidized bed boiler feed back leg non -metallic expansion joint - Google Patents
Modified fluidized bed boiler feed back leg non -metallic expansion joint Download PDFInfo
- Publication number
- CN205227300U CN205227300U CN201520863926.3U CN201520863926U CN205227300U CN 205227300 U CN205227300 U CN 205227300U CN 201520863926 U CN201520863926 U CN 201520863926U CN 205227300 U CN205227300 U CN 205227300U
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- China
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- expansion joint
- feed back
- back leg
- plate
- seal chamber
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Abstract
Modified fluidized bed boiler feed back leg non -metallic expansion joint. The utility model belongs to the technical field of the fluidized bed boiler, especially, relate to modified 300MW CFB boiler feed back leg non -metallic expansion joint. The improvement does, sets up the crown plate at the pipe end fixing of expansion joint, and crown plate department sets up the inside seal chamber one, set up the ceramic fibre rope and compress tightly by thermal -insulated cotton in the clearance department of inside seal intracavity crown plate, the inside seal chamber for the open end inner skin seal, set up the external seal chamber on the pipe outside inner skin again one, pack thermal -insulated cottonly in the external seal chamber, external seal chamber open end is closed with outer covering. The utility model discloses simple structure has solved feed back leg non -metallic expansion joint three -dimensional inflation, easy super temperature, burns out and leak the scheduling problem, seals to insulate against heat respond wellly, can improve unit safety nature, economic nature, reliability.
Description
Technical field
The utility model belongs to fluidized-bed combustion boiler technical field, particularly relates to the 300MWCFB boiler feed back leg non-metal expansion joint of improvement.
Background technology
Because there is three-dimensional expansion issues between CFB boiler furnace and feed back leg, therefore the CFB boiler three-dimensional expansion issues that generally all adopts non-metal expansion joint to solve it to exist at burner hearth and feed back leg connecting portion, but due to the adjustment of combustion conditions in the middle of actual motion, burner hearth swell increment and internal pressure can change to some extent, cause non-metal expansion joint to be easy to damage.Feed back leg one end is connected with water-cooling wall seal box by non-metal expansion joint, and the other end connects with material returning valve.Can expand left, forwards, backwards, downwards gradually on the left of burner hearth when boiler startup, feed back leg can to the right, downwards with to burner hearth medial expansion, and can expand to the right, forwards, backwards and downwards gradually on the right side of burner hearth, feed back leg can left, downwards with to burner hearth medial expansion, the visible very irregular of swell increment herein, therefore cannot judge Expansion Regularity herein under each operating mode of unit well.In addition, high, the erosive wear of high temperature circulation ash concentration is strong herein, and under positive pressure environment, and the expansion joint pressure ratio of bearing is larger herein.Due to this feature of CFB boiler, very high requirement is proposed to the design of feed back leg non-metal expansion joint sealing.
Intrinsic non-metal expansion joint adopts two-layer sealing, and unreasonable structure, ground floor is sealed into sealed packing, and the second layer is sealed into covering.During boiler operatiopn, due to three direction displacement, the even inflation seam reserved is made to become uneven, sealed packing has distortion and disrepair phenomenon simultaneously, finally make ground floor seal and do not have sealing effectiveness, high temperature ash directly pours non-metal expansion joint inside, causes the problems such as non-metal expansion joint internal insulation material is emptied, surperficial overtemperature, covering are aging, last expansion joint covering is damaged because bearing feed back leg internal pressure, and time serious, boiler is forced to banking fire and even can causes that unit is non-to stop.
Utility model content
The purpose of this utility model solves feed back leg non-metal expansion joint three-dimensional to expand, and easy overtemperature, burns out and the problem such as leakage, takes measure targetedly to transform it, can obtain good effect, improve unit safety, economy, reliability.
Solution of the present utility model is: arrange ring flat-plate at the pipe end winding support of expansion joint, ring flat-plate place arranges annular seal space together, ceramic fibre rope is set at the gap location of interior annular seal space inner ring plate and is compressed by heat insulation foam, interior annular seal space openend inside panel is closed, pipe outside inside panel is arranged again one external seal chamber, stuffed heat insulated cotton in external seal chamber, openend, external seal chamber exterior skin is closed.
The cold conditions preset clearance of the ring flat-plate of described expansion joint is≤30mm.
Ceramic fibre rope in interior annular seal space is the rectangle of 80mm × 80mm, is positioned the gap location between ring flat-plate by the interior angle steel established and fixed triangle plate.
The two sides in external seal chamber are ring bodies, and be separately fixed at the pipe both sides of expansion joint, outer rim is Flange-shaped Parts, fixes exterior skin by fastening bolt; Arrange the elliptical tube of a containing expansion joint pipe in external seal chamber, a side of interior annular seal space is the ring flat-plate of homonymy, and another side is be fixed on the ring flat-plate on this side elliptical tube, and inside panel fixed by outer rim fastening bolt.
First, according to flowing and the pipe expansion characteristic of heat ash in feed back leg inclined tube, on the basis of former expansion joint, do not change the main-body structure of former project organization, increase built-in sealing together, form three hermetically-sealed constructions, and sealing station is slightly made improvements, can effectively high temperature ash be blocked in by the chamber that side restricts and inside panel forms.Secondly, reserve expansion clearance to the expansion joint two ends cold conditions of feed back leg and burner hearth interface to readjust, the adjustment of cold conditions preset clearance at below 30mm, and the flange at this place is repaired and corrected, make its preset clearance entirety keep smooth, even, decrease the leakage rate of heat ash.Finally, emphasis is repaired the inner wearing-proof refractory material of feed back leg, especially to having carried out focus of repairing to the rapid wear harm such as expansion joint two ends and burner hearth entrance, the integrity of the inner wearing-proof refractory material of feed back leg is maintained, from the possibility having stopped the distortion of feed back leg at all.
Advantageous Effects of the present utility model is: this feed back leg non-metal expansion joint renovation technique solves overtemperature, burn out and the problem such as leakage, measure is targetedly taked to transform it, achieve good effect, improve unit safety, reliability and economy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: ring flat-plate 1, pipe 2, heat insulation foam 3, inside panel 4, exterior skin 5, fastening bolt 6, ceramic fibre rope 7, angle steel 8, fixed triangle plate 9, elliptical tube 10, castable 11.
Detailed description of the invention
Below by embodiment also by reference to the accompanying drawings, renovation technique scheme of the present utility model is further described in detail.
As shown in Figure 1, annular seal space is together increased outside in annular seal space, form three hermetically-sealed constructions, namely the elliptical tube 10 that accommodates expansion joint pipe 2 is set in external seal chamber, one side of interior annular seal space is the ring flat-plate 1 of homonymy, another side is be fixed on the ring flat-plate on this side elliptical tube 10, the gap of the ring flat-plate 1 of interior annular seal space is adjusted to more reasonably≤30mm, gap location arranges the rectangular ceramic cordage 7 of 80mm × 80mm and after being compressed by heat insulation foam 3, inside panel 4 fixed by the outer rim fastening bolt of interior annular seal space.
Technique scheme of the present utility model can be blocked in large calorimetric ash, heat smoke by the chamber that side restricts and inside panel forms (being full of high temperature resistant heat insulation cotton 3 in chamber) effectively.Upon start up along with the raising of boiler heat load, the gap between ring flat-plate 1 can increase, and ceramic fibre rope 7 is heated and also can expands, and carries out first sealing; Simultaneously in inside panel 5, heat insulation foam 3 becomes more closely knit because of pressurized, and its expansion joint top seal is strengthened, ceramic fibre rope 7 is sealed heat is incessantly grey, heat smoke is sealed in the chamber of inside panel 5; The heat smoke leaked on a small quantity is sealed by the moisturizing heat insulation foam 3 in exterior skin 5 and external seal chamber again.Change ring flat-plate 1 and ceramic fibre rope 7, effectively can ensure that the gap of pipe 2 both sides ring flat-plate 1, thus greatly reduce the high temperature thermal shock of ash to heat-insulation layer and the souring to heat-preservation cotton.Arranging inside and outside covering, is seal to ceramic fibre rope 7 two resealings that heat is incessantly grey, heat smoke carries out.
By above-mentioned transformation, exterior skin 5 external skin temperatures is down to 30 ~ 40 DEG C by original 60 ~ 70 DEG C, and the sealing of feed back leg non-metal expansion joint, heat-insulating property increase greatly.
Claims (4)
1. the fluidized-bed combustion boiler feed back leg non-metal expansion joint improved, it is characterized in that: at the pipe end winding support of expansion joint, ring flat-plate is set, ring flat-plate place arranges annular seal space together, ceramic fibre rope is set at the gap location of interior annular seal space inner ring plate and is compressed by heat insulation foam, interior annular seal space openend inside panel is closed, pipe outside inside panel is arranged again one external seal chamber, stuffed heat insulated cotton in external seal chamber, openend, external seal chamber exterior skin is closed.
2. the fluidized-bed combustion boiler feed back leg non-metal expansion joint of improvement according to claim 1, is characterized in that: the cold conditions preset clearance of the ring flat-plate of expansion joint is≤30mm.
3. the fluidized-bed combustion boiler feed back leg non-metal expansion joint of improvement according to claim 1, is characterized in that: the ceramic fibre rope in interior annular seal space is the rectangle of 80mm × 80mm, is positioned the gap location between ring flat-plate by the interior angle steel established and fixed triangle plate.
4. the fluidized-bed combustion boiler feed back leg non-metal expansion joint of improvement according to claim 1, it is characterized in that: the two sides in external seal chamber are ring bodies, be separately fixed at the pipe both sides of expansion joint, outer rim is Flange-shaped Parts, fixes exterior skin by fastening bolt; Arrange the elliptical tube of a containing expansion joint pipe in external seal chamber, a side of interior annular seal space is the ring flat-plate of homonymy, and another side is be fixed on the ring flat-plate on this side elliptical tube, and inside panel fixed by outer rim fastening bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520863926.3U CN205227300U (en) | 2015-11-03 | 2015-11-03 | Modified fluidized bed boiler feed back leg non -metallic expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520863926.3U CN205227300U (en) | 2015-11-03 | 2015-11-03 | Modified fluidized bed boiler feed back leg non -metallic expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205227300U true CN205227300U (en) | 2016-05-11 |
Family
ID=55902361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520863926.3U Expired - Fee Related CN205227300U (en) | 2015-11-03 | 2015-11-03 | Modified fluidized bed boiler feed back leg non -metallic expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205227300U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019011747A1 (en) * | 2017-07-11 | 2019-01-17 | General Electric Technology Gmbh | System and method for connecting duct sections of a solid return system of a boiler |
| CN112113055A (en) * | 2020-10-15 | 2020-12-22 | 诸暨市沣泽动力机械有限公司 | Novel nonmetal expansion joint of feed back ware furnace |
-
2015
- 2015-11-03 CN CN201520863926.3U patent/CN205227300U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019011747A1 (en) * | 2017-07-11 | 2019-01-17 | General Electric Technology Gmbh | System and method for connecting duct sections of a solid return system of a boiler |
| CN110892195A (en) * | 2017-07-11 | 2020-03-17 | 通用电气技术有限公司 | System and method for connecting pipe segments of a solids return system of a boiler |
| US10907757B2 (en) | 2017-07-11 | 2021-02-02 | General Electric Technology Gmbh | System and method for connecting duct components in a boiler |
| CN110892195B (en) * | 2017-07-11 | 2022-05-03 | 通用电气技术有限公司 | System and method for connecting pipe segments of a solids return system of a boiler |
| CN112113055A (en) * | 2020-10-15 | 2020-12-22 | 诸暨市沣泽动力机械有限公司 | Novel nonmetal expansion joint of feed back ware furnace |
| CN112113055B (en) * | 2020-10-15 | 2023-08-29 | 诸暨市沣泽动力机械有限公司 | Novel nonmetallic expansion joint of feeder return hearth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20161103 |