CN203744245U - Deslagging device of circulating fluidized bed boiler - Google Patents
Deslagging device of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN203744245U CN203744245U CN201420137756.6U CN201420137756U CN203744245U CN 203744245 U CN203744245 U CN 203744245U CN 201420137756 U CN201420137756 U CN 201420137756U CN 203744245 U CN203744245 U CN 203744245U
- Authority
- CN
- China
- Prior art keywords
- boiler
- bed
- hearth
- deslagging
- slag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000010884 boiler slag Substances 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011819 refractory material Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 31
- 239000000463 material Substances 0.000 abstract description 12
- 239000010419 fine particle Substances 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract 6
- 230000009970 fire resistant effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Abstract
The utility model discloses a deslagging device of a circulating fluidized bed boiler, and belongs to the technical field of circulating fluidized bed boiler equipment. The device comprises a hearth lower part taper section, separation beds, hearth deslagging holes and boiler deslagging pipes, wherein the separation beds are arranged on the hearth lower part taper section and have the same number as the hearth deslagging holes and the boiler deslagging pipes; a water-cooling air distribution plate is arranged at the bottom of each separation bed and formed by extending part of a hearth air distribution plate, and air is supplied from a separation bed air box; the separation bed is formed by extending a hearth water-cooling wall, and a lining is made of wear-resistant and fire-resistant materials. The working principle of the deslagging device is as follows: boiler bottom slags about to be discharged at the lower part of a hearth are separated under the action of fluidized air at the lower part of the separation beds, and a certain amount of fine particles are re-conveyed to the hearth, so that the circulation amount of materials in the boiler is guaranteed and the heat transfer coefficient of the hearth is increased; residual large slags are discharged from the hearth through the boiler deslagging pipes and further cooled in a roller slag cooler.
Description
Technical field
The utility model relates to a kind of deslagging device of circulating fluidized bed boiler, relates in particular to a kind of deslagging device of circulating fluidized bed boiler with roller slag cooler.
Background technology
The bed material of CFBB has the advantages that wide-size distribution distributes, and in the time that bed material has wider screening or different grain density, just there will be lamination in fluid mapper process.Less or lighter particle has less terminal velocity, be easy to by elutriation upwards, and the larger or heavier particle of particle diameter has larger terminal velocity, is therefore easy to be deposited in bottom.In fluid bed running, in order to control a material amount and the suitable height of bed, prevent large slag deposits, those large slags that cannot flow will be discharged burner hearth by slag-drip opening, enter slag cooler and carry out cooling.
The preservation efficiency of circulating fluidized bed boiler bottom part tapping process impact bed material in fluidized system.Although there is stronger particle lamination in boiler emulsion zone, in tapping process, will there is a certain amount of fine particle to discharge burner hearth with bulky grain, reduce suspended material concentration in recirculating fluidized bed, directly affect the heat exchange of burner hearth internal heating surface, cause fire box temperature higher than design load, and then cause the concentration of emission of SOx and NOx to raise.
Slag Cooler for Circulation Fluidized Bed Boiler mainly contains two kinds of forms, and one is air-water combined slag cooler, and another kind is roller slag cooler.Air-water combined slag cooler itself has the function that the end slag of burner hearth discharge is carried out to sorting, in the slag cooler course of work, can again send the thinner bed material emitting with boiler bottom slag back to participate in burner hearth in stove inner-outer circulation.But affected greatlyr because air-water combined slag cooler enters stove coal particle size, and operation stability is poor, and therefore, current most CFBBs adopt roller slag coolers.
Roller slag cooler itself does not possess the sorting function of end slag, in order to improve the preservation efficiency of granule in fluid bed, should reduce the bed drain purge of fine particle as far as possible, if place arranges sorting unit at burner hearth slag-drip opening, can effectively improve the internal circulating load of material in stove, ensure that the material concentration in bed distributes.
Utility model content
The utility model cannot be realized the sorting problem of boiler bottom slag for the CFBB that adopts roller slag cooler, a kind of deslagging device of circulating fluidized bed boiler is proposed, by setting up the sorting bed of slag-drip opening, realize the recovery of thin slag, to solve the problem of recycle stock quantity not sufficient in stove.
The technical solution of the utility model is as follows:
A kind of deslagging device of circulating fluidized bed boiler, comprise lower furnace portion cone section, burner hearth slag-drip opening, boiler slag discharging tube and the burner hearth air distribution plate being formed by water screen tube, it is characterized in that: in described lower furnace portion cone section, be provided with sorting bed, the quantity of this sorting bed is identical with boiler slag discharging tube quantity with burner hearth slag-drip opening; Each sorting bed comprises sorting bed bed body, water-cooled distributor and sorting bed bellows; Described sorting bed bed body is extended around forming by furnace wall cooling, inner liner abrasive resistant refractory material; Described sorting bed bellows are positioned at the bottom of water-cooled distributor; Described burner hearth slag-drip opening is arranged on sorting bed bed body, and is connected with boiler slag discharging tube.
Technical characterictic of the present utility model is also: described water-cooled distributor is extended and formed by partial hearth air distribution plate.
The utlity model has following outstanding advantages and effect: 1. between burner hearth slag-drip opening and boiler slag discharging tube, sorting bed is set, can be by the granule filtered and recycled in tapping process, improve the preservation efficiency of granule in fluid bed, having improved material concentration in stove distributes, thereby ensure the heat transfer in stove, effectively control fire box temperature, reduce pollutant emission; 2. because air-water combined slag cooler is responsive especially to the granularity of slag, especially use spoil bulky grain more in the situation that the operation of slag cooler more difficult, and in high temperature bottom slag, contain certain carbon residue, after contacting with fluidized wind, may produce combustion phenomena again, its consequence will be continuous coking or caking in slag cooler, and unit cannot normally move.This point has also obtained abundant checking in many unit operations at home.So this slag-draining device is furnished with roller slag cooler simultaneously, compares air-water combined slag cooler and be conducive to large-scale promotion and application.
Brief description of the drawings
Fig. 1 is the structural representation of existing deslagging device of circulating fluidized bed boiler.
The deslagging device of circulating fluidized bed boiler structural representation with sorting bed that Fig. 2 provides for the utility model.
Fig. 3 is sorting bed structure and cloth wind schematic diagram.
Fig. 4 is that boiler slag discharging tube and sorting bed are arranged schematic diagram.
Mark in figure: 1-lower furnace portion cone section; 2-sorting bed bed body; 3-boiler slag removal mouth; 4-boiler slag discharging tube; 5-sorting bed air distribution plate; 6-sorting bed bellows; 7-burner hearth air distribution plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, structure of the present utility model, principle and detailed description of the invention are described further.
The structural principle schematic diagram of a kind of deslagging device of circulating fluidized bed boiler that Fig. 2 and Fig. 3 provide for the utility model, slag-draining device mainly comprises lower furnace portion cone section 1, boiler slag removal mouth 3, boiler slag discharging tube 4, the burner hearth air distribution plate 7 and the sorting bed that are made up of water screen tube, sorting bed is arranged between lower furnace portion cone section 1 and boiler slag discharging tube 4, its quantity identical with boiler slag discharging tube 4 quantity with boiler slag removal mouth 3 (referring to Fig. 4); Each sorting bed comprises sorting bed bed body 2, water-cooled distributor 5 and sorting bed bellows 6; Described sorting bed bed body 2 is extended around forming by furnace wall cooling, inner liner abrasive resistant refractory material; Water-cooled distributor 5 is extended and is formed by partial hearth air distribution plate 7; Sorting bed bellows 6 are positioned at the bottom of water-cooled distributor 5, and are connected with described water-cooled distributor 5.
Owing to being provided with sorting bed in lower furnace portion cone section, and by sorting bed bellows 6 independent air-feedings, under the fluidisation wind action of sorting bed bottom (in sorting bed, fluidising air velocity is generally 0.5～1.5 times of burner hearth emulsion zone fluidizing velocity), although lower furnace portion cone section 1(emulsion zone) the stronger particle lamination of existence, in tapping process, will there is a certain amount of fine particle to enter sorting bed with bulky grain, can again send the fine particle that enters sorting bed with large slag back to burner hearth, thereby the internal circulating load of material in guarantee stove, improves Heat Transfer in Furnace coefficient; In reducing boiler cost, effectively control the discharge of pollutant in flue gas.The large slag of residue that is deposited on sorting bed bed body 2 bottoms is discharged burner hearth by boiler slag discharging tube 4, and it is further cooling to enter roller slag cooler.
Claims (2)
1. a deslagging device of circulating fluidized bed boiler, comprise lower furnace portion cone section (1), burner hearth slag-drip opening (3), boiler slag discharging tube (4) and the burner hearth air distribution plate (7) being formed by water screen tube, it is characterized in that: in described lower furnace portion cone section (1), be provided with sorting bed, the quantity of this sorting bed is identical with boiler slag discharging tube (4) quantity with burner hearth slag-drip opening (3); Each sorting bed comprises sorting bed bed body (2), water-cooled distributor (5) and sorting bed bellows (6); Described sorting bed bed body (2) is extended around forming by furnace wall cooling, inner liner abrasive resistant refractory material; Described sorting bed bellows (6) are positioned at the bottom of water-cooled distributor (5); It is upper that described burner hearth slag-drip opening (3) is arranged on sorting bed bed body (2), and be connected with boiler slag discharging tube (4).
2. a kind of deslagging device of circulating fluidized bed boiler as claimed in claim 1, is characterized in that: described water-cooled distributor (5) is extended and formed by partial hearth air distribution plate (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420137756.6U CN203744245U (en) | 2014-03-25 | 2014-03-25 | Deslagging device of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420137756.6U CN203744245U (en) | 2014-03-25 | 2014-03-25 | Deslagging device of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203744245U true CN203744245U (en) | 2014-07-30 |
Family
ID=51344039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420137756.6U Expired - Lifetime CN203744245U (en) | 2014-03-25 | 2014-03-25 | Deslagging device of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203744245U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851610A (en) * | 2014-03-25 | 2014-06-11 | 清华大学 | Slag discharging device of circulating fluidized bed boiler |
| CN104198655A (en) * | 2014-08-21 | 2014-12-10 | 华东理工常熟研究院有限公司 | Separation method of bottom slag minerals of circulating fluidized bed boiler |
| CN114135865A (en) * | 2021-12-20 | 2022-03-04 | 重庆大学 | High-temperature ash storage device and circulating fluidized bed boiler provided with same |
-
2014
- 2014-03-25 CN CN201420137756.6U patent/CN203744245U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851610A (en) * | 2014-03-25 | 2014-06-11 | 清华大学 | Slag discharging device of circulating fluidized bed boiler |
| CN104198655A (en) * | 2014-08-21 | 2014-12-10 | 华东理工常熟研究院有限公司 | Separation method of bottom slag minerals of circulating fluidized bed boiler |
| CN104198655B (en) * | 2014-08-21 | 2016-01-13 | 华东理工常熟研究院有限公司 | A kind of separation method of CFB Slag mineral |
| CN114135865A (en) * | 2021-12-20 | 2022-03-04 | 重庆大学 | High-temperature ash storage device and circulating fluidized bed boiler provided with same |
| CN114135865B (en) * | 2021-12-20 | 2024-02-27 | 重庆大学 | High-temperature ash storage device and circulating fluidized bed boiler with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |