CN203703955U - Secondary air device of novel circulating fluidized bed boiler - Google Patents
Secondary air device of novel circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN203703955U CN203703955U CN201320865434.9U CN201320865434U CN203703955U CN 203703955 U CN203703955 U CN 203703955U CN 201320865434 U CN201320865434 U CN 201320865434U CN 203703955 U CN203703955 U CN 203703955U
- Authority
- CN
- China
- Prior art keywords
- secondary air
- boiler
- airduct
- bed boiler
- pipe
- 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 - Fee Related
Links
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses a secondary air device of a novel circulating fluidized bed boiler. The secondary air device comprises a secondary air mother pipe, a secondary air pipe and a secondary air nozzle, wherein the secondary air mother pipe is annularly fixed at the periphery of a boiler water wall, the secondary air pipe is communicated with the secondary air mother pipe and extends to the lower part of the boiler, and the secondary air nozzle is arranged on the secondary air pipe to be communicated with a boiler furnace. According to the secondary air device of the novel circulating fluidized bed boiler, secondary air of the boiler has enough penetrating power, and can improve material backmixing effect while supplementing air needed by fuel combustion; a three-layer distributing structure can regulate distribution of a temperature field in the furnace sufficiently, so as to enable the flue gas temperature distribution to be uniform; more circulating materials at low temperature can be returned to a dense-phase zone, heat is absorbed in the dense-phase zone, heat released by combustion is taken away, and heat exchange is performed to the middle-upper part of the boiler furnace and the water wall; the oxygen content of a central area of the boiler furnace is ensured to be sufficient and the combustion is more thorough and sufficient.
Description
Technical field
The utility model relates to boiler technology field, particularly circulating fluid bed boiler overfire air device.
Background technology
CFBB air distribution is wind and Secondary Air once, the design proportion of a general wind and Secondary Air is 60-55% and 40-45%, one time wind is the fluidisation that guarantees material, and Secondary Air is in order to guarantee the abundant mixing of fuel combustion requisite oxygen amount and material, overheavy firing.
Nearly all CFB boiler all exists the problem of burner hearth center anoxic, trace it to its cause except high density material particles group is to the barrier effect of Secondary Air jet, region of variation eddy current disturbs and the inhomogeneous impact of pan-up speed also to exist sticking wall flow vertically to drop to cover water-cooling wall, each aspect particle level to move not evenly, respectively turn.
Utility model content
In order to address the above problem, the utility model provides a kind of circulating fluid bed boiler overfire air device.The technical problems to be solved in the utility model is: improve the anoxic conditions of burner hearth, adjust the distribution of temperature field in furnace, make smoke distribution more even.In order to realize above-mentioned technical purpose, the technical solution of the utility model is: circulating fluid bed boiler overfire air device, it is characterized in that, and comprise the female airduct of Secondary Air, Secondary Air airduct, overfire air jet; The female airduct of described Secondary Air is the surrounding that annular is fixed on boiler water wall, and described Secondary Air airduct is connected with the female airduct of Secondary Air, and extends to boiler bottom; Described overfire air jet is arranged on Secondary Air airduct and with boiler furnace and is connected.
In such scheme, described overfire air jet is provided with butterfly throttle.
In such scheme, described Secondary Air airduct is uniformly distributed on the front-back wall water-cooling wall of boiler.
In such scheme, described overfire air jet is point three layers of layout on Secondary Air airduct.
In such scheme, described overfire air jet and horizontal direction angle are 15 degree.
Advantage of the present utility model and beneficial effect are: the utility model provides a kind of circulating fluid bed boiler overfire air device, make the Secondary Air of boiler there is enough penetration capacitys, when postcombustion burns required air capacity and the back-mixing of strength imparting material, points three layers arrange to adjust the distribution of temperature field in furnace sufficient, flue-gas temperature is more evenly distributed; And make the recycle stock that more temperature are low return to emulsion zone, absorb heat at emulsion zone, take away the heat that burning discharges, carry out heat exchange in burner hearth middle and upper part and water-cooling wall; The center oxygen amount that simultaneously guarantees burner hearth is abundant, and burning more thoroughly fully.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present utility model.
In figure: 1, the water-cooling wall 2 of boiler, the female airduct 3 of Secondary Air, Secondary Air airduct
4, butterfly throttle 5, overfire air jet
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is further described.Following examples are only for the technical solution of the utility model is more clearly described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1, the utility model is a kind of circulating fluid bed boiler overfire air device, comprises the female airduct 2 of Secondary Air, Secondary Air airduct 3, overfire air jet 5; Wherein, the female airduct 2 of Secondary Air is the annular surrounding that is fixed on boiler water wall 1, and Secondary Air airduct 3 is connected with the female airduct 2 of Secondary Air, and extends to boiler bottom, and Secondary Air airduct 3 is evenly distributed with 7 groups on the front-back wall water-cooling wall of boiler; Point three overfire air jets 5 of three layers of layout on every group of Secondary Air airduct 3, overfire air jet 5 is connected with boiler furnace; In overfire air jet 5, be provided with butterfly throttle 4; Overfire air jet 5 is 15 degree with horizontal direction angle.When this device busy, three layers of overfire air jet arranging respectively make Secondary Air have enough penetration capacitys, when postcombustion burns required air capacity and the back-mixing of strength imparting material, points three layers arrange to adjust the distribution of temperature field in furnace sufficient, flue-gas temperature is more evenly distributed; Each overfire air jet is controlled air quantity by butterfly throttle, at different absolute altitudes, adjusts and selects suitable secondary wind wind speed, guarantees the abundant burning in burner hearth.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. circulating fluid bed boiler overfire air device, is characterized in that, comprises the female airduct of Secondary Air, Secondary Air airduct, overfire air jet; The female airduct of described Secondary Air is the surrounding that annular is fixed on boiler water wall, and described Secondary Air airduct is connected with the female airduct of Secondary Air, and extends to boiler bottom; Described overfire air jet is arranged on Secondary Air airduct and with boiler furnace and is connected.
2. circulating fluid bed boiler overfire air device according to claim 1, is characterized in that, described overfire air jet is provided with butterfly throttle.
3. circulating fluid bed boiler overfire air device according to claim 2, is characterized in that, described Secondary Air airduct is uniformly distributed on the front-back wall water-cooling wall of boiler.
4. circulating fluid bed boiler overfire air device according to claim 3, is characterized in that, described overfire air jet is point three layers of layout on Secondary Air airduct.
5. circulating fluid bed boiler overfire air device according to claim 4, is characterized in that, described overfire air jet and horizontal direction angle are 15 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320865434.9U CN203703955U (en) | 2013-12-25 | 2013-12-25 | Secondary air device of novel circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320865434.9U CN203703955U (en) | 2013-12-25 | 2013-12-25 | Secondary air device of novel circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203703955U true CN203703955U (en) | 2014-07-09 |
Family
ID=51054390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320865434.9U Expired - Fee Related CN203703955U (en) | 2013-12-25 | 2013-12-25 | Secondary air device of novel circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203703955U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907734A (en) * | 2017-05-04 | 2017-06-30 | 苏州迪森能源技术有限公司 | Blowing system and fuel combination boiler |
| CN109539246A (en) * | 2018-11-15 | 2019-03-29 | 马素霞 | A kind of coal dust medium temperature circulating bed boiler |
| CN114151788A (en) * | 2021-12-02 | 2022-03-08 | 无锡华光环保能源集团股份有限公司 | Secondary air pipe structure of circulating fluidized bed boiler |
-
2013
- 2013-12-25 CN CN201320865434.9U patent/CN203703955U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907734A (en) * | 2017-05-04 | 2017-06-30 | 苏州迪森能源技术有限公司 | Blowing system and fuel combination boiler |
| CN109539246A (en) * | 2018-11-15 | 2019-03-29 | 马素霞 | A kind of coal dust medium temperature circulating bed boiler |
| CN114151788A (en) * | 2021-12-02 | 2022-03-08 | 无锡华光环保能源集团股份有限公司 | Secondary air pipe structure of circulating fluidized bed boiler |
| CN114151788B (en) * | 2021-12-02 | 2023-11-21 | 无锡华光环保能源集团股份有限公司 | Secondary air pipe structure of circulating fluidized bed boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Numerical simulations of flow, combustion characteristics, and NOx emission for down-fired boiler with different arch-supplied over-fire air ratios | |
| CN1020656C (en) | Flame stabilizing ring for burner | |
| CN203703955U (en) | Secondary air device of novel circulating fluidized bed boiler | |
| CN102563624A (en) | Combustion device for tangentially fired boiler and ultralow NOx combustion method employing same | |
| CN106439793B (en) | A kind of colm high efficency low NOx segmented couples combustion method | |
| CN204554801U (en) | Circulating fluid bed boiler secondary air hierarchical arrangement system | |
| CN104279556A (en) | Secondary air distribution method for circulating fluidized bed boiler | |
| CN101818893B (en) | W-flame boiler with boundary-secondary wind jet | |
| CN106247322B (en) | The W flame boiler that a kind of lack of gas windage yaw is put | |
| CN101086335A (en) | Circulated fluid bed boiler and tangential firing method | |
| CN107606605A (en) | A kind of W flame boiler using flue gas recycled | |
| Kuang et al. | Effect of overfire air angle on flow characteristics within a small-scale model for a deep-air-staging down-fired furnace | |
| CN101280920B (en) | Fluidization-suspension combined combustion boiler | |
| Li et al. | Effect of angle of arch-supplied overfire air on flow, combustion characteristics and NOx emissions of a down-fired utility boiler | |
| CN204005958U (en) | A kind of low NO of generating plant pulverized coal boiler | |
| CN104315504B (en) | A circulating fluidized bed boiler capable of inhibiting formation of a combustion high-temperature region and an inhibiting method | |
| CN203115996U (en) | Hearth air intake adjusting device of biomass circulating fluidized bed boiler | |
| CN102537959A (en) | Rotational flow and direct current combined gas burner | |
| CN104748147A (en) | Firing method of wall type opposed firing boiler | |
| CN104748146B (en) | Sectional blended coal blending method | |
| CN203757696U (en) | Low-nitrogen combustion device of middle storage cabin type hot air powder feeding boiler | |
| CN207486788U (en) | A kind of circulating fluidized bed boiler of blending gas | |
| CN205717179U (en) | The cloth wind structure of CFBB | |
| Wang et al. | An innovative combustion technology for a down-fired boiler with swirl burners: gas/solid flow characteristics with various burner injection angles | |
| CA2779818C (en) | Oxygen mixer for oxygen combustion boiler |
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 |
Granted publication date: 20140709 Termination date: 20171225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |