CN105570879B - Multipath circulating fluidized bed boiler with one-level self-balancing material returning device - Google Patents
Multipath circulating fluidized bed boiler with one-level self-balancing material returning device Download PDFInfo
- Publication number
- CN105570879B CN105570879B CN201610067298.7A CN201610067298A CN105570879B CN 105570879 B CN105570879 B CN 105570879B CN 201610067298 A CN201610067298 A CN 201610067298A CN 105570879 B CN105570879 B CN 105570879B
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- CN
- China
- Prior art keywords
- steel plate
- distribution plenum
- burner hearth
- returning device
- material returning
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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
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
-
- 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
Abstract
The present invention relates to the multipath circulating fluidized bed boiler with one-level self-balancing material returning device, balance material returning device includes steel plate partition wall, and one end solid welding of steel plate partition wall is shielded on membrane wall after burner hearth；Membrane wall bottom is shielded in distribution plenum solid welding after burner hearth, and the uniform solid welding in distribution plenum top has multiple small blast caps；Rear side ash bucket steel plate is arranged on distribution plenum top side；Shield after burner hearth and left and right sides steel plate is welded between membrane wall and rear side ash bucket steel plate；Steel plate partition wall bottom is with shielding the distance between membrane wall W1 after burner hearth.Beneficial effects of the present invention are：By shielding after self-balancing material returning device is close on membrane wall, without refeed line, the defects of overcoming because of returning charge leg expansion drawing crack water-cooling screen or material returning device panel, it is simple in construction, overall package delivery or in-site installation, save a large amount of mounting materials and cost of labor, and good airproof performance in easily fabricated factory, beneficial to the reduction of multipath circulating fluidized bed boiler height, boiler room construction cost is saved for user.
Description
Technical field
The present invention relates to flowing device technical field, especially relate to the multipath circulating fluidized bed of one-level self-balancing material returning device
Boiler.
Background technology
Material returning device is one of important component of CFBB, is the critical component of material circulating system.Using certainly
Body structure feature realizes high-temperature material negative sequence harmonic transmission, makes the high temperature ash that separates from separator, returning pressure compared with
In high burner hearth.Can the part normal, Effec-tive Function, directly influences stabilization, the Effec-tive Function of CFBB.
Common material returning device can be divided into by structural form：L valves, J valves, U valves, N valves and reversal valve.
The returning charge effect of U-shaped valve is best, and its stability is good, and sealing is strong, and self-balance type can be optimal, and at present U
Type valve is mostly individually as separator or ash bucket lower section, it is necessary to which considerably long returning charge leg, the thermal expansion force problem of dipleg are difficult to solve
Certainly.
The content of the invention
Weak point present in regarding to the issue above, the present invention provide the multipaths with one-level self-balancing material returning device and followed
Circulation fluidized bed boiler.
To achieve the above object, the present invention provides the multipath circulating fluidized bed boiler with one-level self-balancing material returning device,
Including：
Burner hearth, shield after the burner hearth of the burner hearth sidepiece on membrane wall and balance material returning device is installed；
The balance material returning device includes steel plate partition wall, and one end solid welding of the steel plate partition wall shields film after the burner hearth
On formula wall, fire-resistant abrasion-proof castable and fire resisting bitch are cast with inside the steel plate partition wall；
Membrane wall bottom is shielded in distribution plenum solid welding after the burner hearth, and the uniform solid welding in distribution plenum top has multiple small wind
Cap；
Rear side ash bucket steel plate is arranged on distribution plenum top side, and the top of the rear side ash bucket steel plate is provided with inclined
45 °~75 ° angles；
Shield after the burner hearth and left and right sides steel plate is welded between membrane wall and the rear side ash bucket steel plate；
The steel plate partition wall bottom is with shielding the distance between membrane wall W1, the steel plate partition wall bottom after the burner hearth
The distance between rear side ash bucket steel plate bottom W2；
1/2W2≤W1≤W2；
Shield membrane wall after the burner hearth and be provided with rectangular opening, the height h2 of the rectangular opening, the width b of the rectangular opening,
The distance between the rectangular opening lower end and the small blast cap h1, the lower end of the rectangular opening lower end and the steel plate partition wall away from
From δ, the rear side ash bucket steel plate lower vertical section top edge to the small blast cap height h3, the lower end of the steel plate partition wall with
Distance h0 between the small blast cap (4)；
H0+ δ=h1；0≤δ≤(1/4~1/2) h0；h3≥h1；
W1*b=(1/3~1/2) h2*b.
Further improved as of the invention, the distribution plenum is by distribution plenum upper steel plate, distribution plenum lower steel plate, distribution plenum side steel
Steel plate is welded after plate and distribution plenum；
Airduct is loosened on steel plate after the distribution plenum lower steel plate or distribution plenum side steel plate or distribution plenum；
Multiple through holes being connected with the small blast cap are machined with the distribution plenum upper steel plate.
Beneficial effects of the present invention are：By shielding after self-balancing material returning device is close on membrane wall, without refeed line, gram
The defects of having taken because of returning charge leg expansion drawing crack water-cooling screen or material returning device panel, simple in construction, overall package is sent out in easily fabricated factory
Goods or in-site installation, a large amount of mounting materials and cost of labor, and good airproof performance are saved, beneficial to multipath circulating fluidized bed boiler
The reduction of height, boiler room construction cost is saved for user.
Brief description of the drawings
Fig. 1 is the side view of multipath circulating fluidized bed boiler of the present invention with one-level self-balancing material returning device；
Fig. 2 is that the structure of the material returning device of multipath circulating fluidized bed boiler of the present invention with one-level self-balancing material returning device is shown
It is intended to；
Fig. 3 be in Fig. 2 A-A to diagram；
Fig. 4 is the knot of the partition wall steel plate of multipath circulating fluidized bed boiler of the present invention with one-level self-balancing material returning device
Structure schematic diagram；
Fig. 5 is that the structure of the small blast cap of multipath circulating fluidized bed boiler of the present invention with one-level self-balancing material returning device is shown
It is intended to.
In figure：1st, steel plate partition wall；2nd, left and right sides steel plate；3rd, rear side ash bucket steel plate；4th, small blast cap；5th, distribution plenum；6、
Loosen airduct；7th, membrane wall is shielded after burner hearth；8th, distribution plenum upper steel plate；9th, fire-resistant abrasion-proof castable；10th, fire resisting bitch.
Embodiment
As Figure 1-5, the multipath circulating fluidized bed boiler with one-level self-balancing material returning device of the embodiment of the present invention,
Including：Burner hearth, shield after the burner hearth of burner hearth sidepiece on membrane wall 7 and balance material returning device is installed；Balance material returning device include steel plate every
Disconnected wall 1, one end solid welding of steel plate partition wall 1 are shielded on membrane wall 7 after burner hearth.The solid welding of distribution plenum 5 is shielded under membrane wall 7 after burner hearth
Portion, the uniform solid welding in the top of distribution plenum 5 have multiple small blast caps 4.Rear side ash bucket steel plate 3 is arranged on the top side of distribution plenum 5.In burner hearth
Shield afterwards and left and right sides steel plate 2 is welded between membrane wall 7 and rear side ash bucket steel plate 3；The bottom of steel plate partition wall 1 after burner hearth with shielding film
The distance between formula wall 7 W1, the distance between the bottom of steel plate partition wall 1 and the bottom of rear side ash bucket steel plate 3 W2；1/2W2≤W1≤
W2；Shield membrane wall 7 after burner hearth and be provided with rectangular opening, the height h2 of rectangular opening, the width b of rectangular opening, rectangular opening lower end and small wind
The distance between cap 4 h1, the lower end distance δ of rectangular opening lower end and steel plate partition wall 1, in the lower vertical section of rear side ash bucket steel plate 3
Edge is to small the height h3 of blast cap 4, distance h0 between the lower end of steel plate partition wall 1 and small blast cap 4.H0+ δ=h1；0≤δ≤1/4~
1/2h0；h3≥h1；W1*b=(1/3~1/2) h2*b.The top of rear side ash bucket steel plate 3 is provided with inclined 45 °~75 ° angles.Steel
Fire-resistant abrasion-proof castable 9 and fire resisting bitch 10 are cast with inside plate partition wall 1.Distribution plenum 5 is by distribution plenum upper steel plate 8, distribution plenum
Steel plate is welded after lower steel plate, distribution plenum side steel plate and distribution plenum, loosens airduct 6 and is arranged on distribution plenum lower steel plate or distribution plenum
After side steel plate or distribution plenum on steel plate, multiple through holes being connected with small blast cap 4 are machined with distribution plenum upper steel plate 8.
Steel plate 2 shields membrane wall with shielding membrane wall after ash bucket steel plate 3 or secondary furnace on rear side of part after burner hearth wherein at left and right sides of part
7th, distribution plenum 5 forms seal cavity, and distribution plenum 5 is welded under steel plate partition wall 1, left and right sides steel plate 2, rear side ash bucket steel plate 3
Portion, some small blast caps 4 are disposed with distribution plenum upper steel plate 8, steel plate partition wall 1 is 90 ° and is arranged inside cavity, is welded with thereon
This structure is divided into the connected material channel in former and later two bottoms, forms U-shaped material returning device by heat-resisting bitch 10, steel plate partition wall 1.W1
It is distance of the steel plate partition wall 1 to screen membrane wall 7 after burner hearth, W2 is after steel plate partition wall 1 arrives rear side ash bucket steel plate 3 or secondary furnace
Shield the distance of membrane wall, h1 is to shield the distance that the perforate lower edge of membrane wall 7 arrives small blast cap 4 after burner hearth, and h2 is screen membrane wall 7 after burner hearth
The height of lower edge in perforate, h0 are the distances that steel plate partition wall 1 arrives small blast cap 4, and h3 is shielded after rear side ash bucket steel plate 3 or secondary furnace
Membrane wall vertical section top edge is to the height of small blast cap 4, wherein W1≤W2；1/2W2≤W1；Flow area W1*b=corresponding to W1
(1/3~1/2) h2*b (flow area corresponding to h2*b outlets, b is the width of material channel)；H0+ δ=h1；0≤δ≤(1/4
~1/2) h0；The inclination angle for shielding water-cooling wall on rear side of h3 >=h1 after ash bucket steel plate 3 or secondary furnace be α, its angular dimension for 45 °~
75°。
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (2)
1. the multipath circulating fluidized bed boiler with one-level self-balancing material returning device, it is characterised in that including：
Burner hearth, shield after the burner hearth of the burner hearth sidepiece on membrane wall (7) and balance material returning device is installed；
The balance material returning device includes steel plate partition wall (1), and one end solid welding of the steel plate partition wall (1) is shielded after the burner hearth
On membrane wall (7), fire-resistant abrasion-proof castable (9) and fire resisting bitch (10) are cast with inside the steel plate partition wall (1)；
Membrane wall (7) bottom is shielded in distribution plenum (5) solid welding after the burner hearth, and the uniform solid welding in distribution plenum (5) top has multiple
Small blast cap (4)；
Rear side ash bucket steel plate (3) is arranged on the distribution plenum (5) top side, and the top of the rear side ash bucket steel plate (3) is provided with
Inclined 45 °~75 ° angles；
Shield after the burner hearth and left and right sides steel plate (2) is welded between membrane wall (7) and the rear side ash bucket steel plate (3)；
Steel plate partition wall (1) bottom is with shielding the distance between membrane wall (7) W1, the steel plate partition wall after the burner hearth
(1) the distance between bottom and rear side ash bucket steel plate (3) bottom W2；
1/2W2≤W1≤W2；
Shield membrane wall (7) after the burner hearth and be provided with rectangular opening, the height h2 of the rectangular opening, the width b of the rectangular opening, institute
State the distance between rectangular opening lower end and the small blast cap (4) h1, the rectangular opening lower end with the steel plate partition wall (1)
Hold distance δ, rear side ash bucket steel plate (3) the lower vertical section top edge to small blast cap (4) the height h3, the steel plate cut-off
Distance h0 between the lower end of wall (1) and the small blast cap (4)；
H0+ δ=h1；0≤δ≤(1/4~1/2) h0；h3≥h1；
W1*b=(1/3~1/2) h2*b.
2. the multipath circulating fluidized bed boiler according to claim 1 with one-level self-balancing material returning device, its feature exist
In：The distribution plenum (5) is welded by steel plate after distribution plenum upper steel plate (8), distribution plenum lower steel plate, distribution plenum side steel plate and distribution plenum
Form；
Airduct (6) is loosened on steel plate after the distribution plenum lower steel plate or distribution plenum side steel plate or distribution plenum；
Multiple through holes being connected with the small blast cap (4) are machined with the distribution plenum upper steel plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610067298.7A CN105570879B (en) | 2016-01-31 | 2016-01-31 | Multipath circulating fluidized bed boiler with one-level self-balancing material returning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610067298.7A CN105570879B (en) | 2016-01-31 | 2016-01-31 | Multipath circulating fluidized bed boiler with one-level self-balancing material returning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105570879A CN105570879A (en) | 2016-05-11 |
| CN105570879B true CN105570879B (en) | 2018-01-12 |
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| CN201610067298.7A Active CN105570879B (en) | 2016-01-31 | 2016-01-31 | Multipath circulating fluidized bed boiler with one-level self-balancing material returning device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606174B (en) * | 2017-08-16 | 2019-05-07 | 北京热华能源科技有限公司 | A kind of Expansion sealing attachment device |
| CN111102567A (en) * | 2019-12-24 | 2020-05-05 | 江苏绿叶锅炉有限公司 | Process for material return leg of oil shale boiler |
| CN112178628A (en) * | 2020-10-30 | 2021-01-05 | 北京热华能源科技有限公司 | Wedge-shaped channel type separating and returning device and multi-process circulating fluidized bed applying same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4688521A (en) * | 1986-05-29 | 1987-08-25 | Donlee Technologies Inc. | Two stage circulating fluidized bed reactor and method of operating the reactor |
| CN201100635Y (en) * | 2007-08-28 | 2008-08-13 | 北京热华能源科技有限公司 | A self-balanced flow return feeder |
| CN101749696B (en) * | 2010-02-09 | 2011-07-20 | 清华大学 | Multipath circulating fluidized bed boiler |
| CN203384969U (en) * | 2013-06-05 | 2014-01-08 | 太原锅炉集团有限公司 | Return valve of circulating fluidized bed boiler |
| CN205332186U (en) * | 2016-01-31 | 2016-06-22 | 北京热华能源科技有限公司 | Multiple processes circulating fluidized bed boiler with one -level self -balancing returning charge ware |
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Effective date of registration: 20180425 Address after: 075000 Nanshan Industrial Agglomeration Area, Huai'an County, Zhangjiakou, Hebei Patentee after: Hebei hot Boiler Co., Ltd. Address before: 100083 room A109, research and research complex, Tsinghua University, Haidian District, Beijing Patentee before: Beijing Nowva Energy Technology Co., Ltd. |