CN205245199U - Coal fired boiler furnace exit flue gas guider - Google Patents
Coal fired boiler furnace exit flue gas guider Download PDFInfo
- Publication number
- CN205245199U CN205245199U CN201521101931.7U CN201521101931U CN205245199U CN 205245199 U CN205245199 U CN 205245199U CN 201521101931 U CN201521101931 U CN 201521101931U CN 205245199 U CN205245199 U CN 205245199U
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- CN
- China
- Prior art keywords
- flue gas
- adjusting device
- axle
- controllable register
- backup pad
- Prior art date
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Abstract
The utility model provides a coal fired boiler furnace exit flue gas guider, it includes the parallel direction adjusting device who arranges of a plurality of groups, wherein every group direction adjusting device installs respectively and just is located a terminal at flame angle in back water cold wall pipe's rear side. Direction adjusting device is rotation angle adjustable baffle I or height -adjustable's in the mechanism baffle mechanism II. Rotation angle adjustable baffle mechanism I includes adjusting the bezel, axle, crank, goes up backup pad and bottom suspension fagging. Adopt the utility model discloses create, horizontal gas pass speed field in the time of can changing low load operation because it is unanimous basically from top to bottom to flow through horizontal gas pass and furnace exit's flue gas velocity, consequently makes about the superheater tube whole journey to be heated, and then has avoided local super temperature booster.
Description
Technical field
The invention relates to a kind of coal-burning boiler burner hearth outlet flue gas guider, belongs to boiler plant technical field.
Background technology
Electrical network peak-valley difference is large, considers and adopts trough-electricity can reach energy-conservation object, the therefore coal-burning boiler of the thermal power generation state in underrun for a long time. Under this operating mode, there are three kinds of phenomenons in coal-burning boiler: 1, each section of cigarette temperature and suitable at full capacity time in stove; 2, superheater weight flow velocity is low to moderate the limit, to the cooling effect of superheater tube in critical condition; 3, exhaust gas volumn declines to a great extent along with the minimizing of coal amount, causing inner flue gas of the stove distributes and flows all not in perfect condition, especially at horizontal flue to furnace outlet, flue gas subsides furnace arch, furnace nose operation phenomenon is fairly obvious, and horizontal flue and furnace outlet section upper smoke gas velocity level off to zero, and the top portion 1/3 of superheater coil tubes does not absorb heat, middle part 1/3 heat absorption weakens, bottom 1/3 heat absorption aggravation, therefore can cause superheater bottom overtemperature and occur serious booster phenomenon, as shown in Figure 1.
Innovation and creation content
For above deficiency, the invention provides a kind of coal-burning boiler burner hearth outlet flue gas guider, has overcome the phenomenon of the superheater overtemperature tube burst that coal-burning boiler occurs under underrun state.
The invention is implemented by the following technical programs: coal-burning boiler burner hearth outlet flue gas guider, comprise the guiding adjusting device of some groups of parallel arranged, wherein every group of guiding adjusting device is installed on respectively the rear side of rear water screen tube and is positioned at the terminal of furnace arch, furnace nose, and described guiding adjusting device is baffle mechanism I or an adjustable for height baffle mechanism II that the anglec of rotation is adjustable.
Preferably, the baffle mechanism I that the described anglec of rotation is adjustable comprises controllable register, axle, crank, upper backup pad and lower supporting plate, wherein upper backup pad and lower supporting plate parallel placement one on the other, controllable register is vertically placed between upper backup pad and lower supporting plate, one end of upper backup pad is connected with rear water screen tube, the other end of upper backup pad is connected with the upper end of controllable register by axle, one end of lower supporting plate is connected with rear water screen tube, the other end of lower supporting plate is connected with the lower end of controllable register by axle, crank is fixedly connected with the axle of controllable register upper end or the axle of controllable register lower end.
Compared with prior art, the invention has following advantage: the baffle mechanism I or the baffle mechanism II that 1, the invention are provided are installed in coal-burning boiler, horizontal flue velocity field all can change underrun time, because the flue gas flow rate of flow through horizontal flue and furnace outlet is basically identical up and down, therefore make the upper and lower whole process of superheater tube be heated, and then avoided local overheating booster; 2, when adopt the invention provide baffle mechanism I time, the running status of half-open or contract fully when standard-sized sheet, underload can realize at full capacity time, and then the flue gas of pressing close to furnace arch, furnace nose bottom is led, make flue gas be subject to guider interception in the furnace arch, furnace nose end, air-flow is transferred upwards, the flue gas center of the furnace outlet of flowing through is raised, superheater tube is heated in the vertical direction comprehensively, avoid local heating's overtemperature.
Brief description of the drawings
Smoke distribution figure when Fig. 1 is former coal-burning boiler underrun.
Fig. 2 installs the smoke distribution figure after the utility model flue gas guider additional while being coal-burning boiler underrun.
Fig. 3 is the front view of the utility model baffle mechanism I.
Fig. 4 is the top view of the utility model baffle mechanism I.
Detailed description of the invention
Embodiment mono-
Coal-burning boiler burner hearth exports flue gas guider, comprises the guiding adjusting device of some groups of parallel arranged, and the quantity of guiding adjusting device is determined by the interval quantity of water screen tube. Wherein every group of guiding adjusting device is installed on respectively the rear side of rear water screen tube 2 and is positioned at the terminal of furnace arch, furnace nose, and described guiding adjusting device is a baffle mechanism I that the anglec of rotation is adjustable.
As shown in Figures 2 and 3, the baffle mechanism I that the described anglec of rotation is adjustable comprises controllable register 1, axle, crank 3, upper backup pad 4 and lower supporting plate 5, wherein upper backup pad 4 and lower supporting plate 5 parallel placement one on the other, controllable register 1 is vertically placed between upper backup pad 4 and lower supporting plate 5, one end of upper backup pad 4 is connected with rear water screen tube 2, the other end of upper backup pad 4 is connected with the upper end of controllable register 1 by axle, one end of lower supporting plate 5 is connected with rear water screen tube 2, the other end of lower supporting plate 5 is connected with the lower end of controllable register 1 by axle, crank 3 is fixedly connected with the axle of controllable register 1 upper end or the axle of controllable register 1 lower end.
Operation principle: controllable register 1 depends on water screen tube, drives controllable register 1 rotation to reach the object of adjusting by crank 3, and the anglec of rotation of controllable register 1 is 0-90 °, complete shut-down when standard-sized sheet, 50% is loaded while presenting at full capacity.
When coal-burning boiler is during in underrun, flue gas clashes into controllable register 1, produce to the effect of pop-up, in the flue gas of the furnace outlet that makes to flow through, lift in the heart, allow the cigarette speed at ceiling place increase, superheater tube vertical direction whole process is heated, because heating surface absorbs heat comprehensively, deviation Fertilizer Test of Regression Design value, Superheat Steam Temperature raises, auxiliary with II level desuperheating water input, therefore booster will obtain effective management and control. Meanwhile, the resistance producing due to the interception of the adjusting device that is subject to leading, making the flue gas of furnace arch, furnace nose to be subject to controllable register 1 stops, produce eddy current, when break-in upwards, flow velocity reduces, and because flue gas flow rate reduces, the heat exchange of superheater bottom weakens, and the wall temperature of the sensitive part of superheater tube is reduced, and therefore overtemperature tube burst is relaxed containment.
Embodiment bis-
Coal-burning boiler burner hearth outlet flue gas guider, comprise the guiding adjusting device of some groups of parallel arranged, wherein every group of guiding adjusting device is installed on respectively the rear side of rear water screen tube 2 and is positioned at the terminal of furnace arch, furnace nose, and described guiding adjusting device is an adjustable for height baffle mechanism II.
This patent protection domain: shielded above furnace arch, furnace nose, exceed, height is again until water-cooling wall is had loose bowels in scope tube, any adjustable form gas baffle or fixing parapet all belong to scope of patent protection of the present invention.
The eddy current that this patent produces while considering baffle plate complete shut-down produces wearing and tearing to furnace arch, furnace nose and vertical water-wall tube, should carry out abrasionproof processing in generation eddy region.
Claims (2)
1. coal-burning boiler burner hearth outlet flue gas guider, it is characterized in that: the guiding adjusting device that comprises some groups of parallel arranged, wherein every group of guiding adjusting device is installed on respectively the rear side of rear water screen tube (2) and is positioned at the terminal of furnace arch, furnace nose, and described guiding adjusting device is baffle mechanism I or an adjustable for height baffle mechanism II that the anglec of rotation is adjustable.
2. coal-burning boiler burner hearth outlet flue gas guider as claimed in claim 1, it is characterized in that: the baffle mechanism I that the described anglec of rotation is adjustable comprises controllable register (1), axle, crank (3), upper backup pad (4) and lower supporting plate (5), wherein upper backup pad (4) and lower supporting plate (5) parallel placement one on the other, controllable register (1) is vertically placed between upper backup pad (4) and lower supporting plate (5), one end of upper backup pad (4) is connected with rear water screen tube (2), the other end of upper backup pad (4) is connected with the upper end of controllable register (1) by axle, one end of lower supporting plate (5) is connected with rear water screen tube (2), the other end of lower supporting plate (5) is connected with the lower end of controllable register (1) by axle, crank (3) is fixedly connected with the axle of controllable register (1) upper end or the axle of controllable register (1) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521101931.7U CN205245199U (en) | 2015-12-28 | 2015-12-28 | Coal fired boiler furnace exit flue gas guider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521101931.7U CN205245199U (en) | 2015-12-28 | 2015-12-28 | Coal fired boiler furnace exit flue gas guider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205245199U true CN205245199U (en) | 2016-05-18 |
Family
ID=55944270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521101931.7U Expired - Fee Related CN205245199U (en) | 2015-12-28 | 2015-12-28 | Coal fired boiler furnace exit flue gas guider |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205245199U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402748A (en) * | 2015-12-28 | 2016-03-16 | 高洪福 | Guide device for flue gas at outlet of coal-fired boiler furnace |
-
2015
- 2015-12-28 CN CN201521101931.7U patent/CN205245199U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402748A (en) * | 2015-12-28 | 2016-03-16 | 高洪福 | Guide device for flue gas at outlet of coal-fired boiler furnace |
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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 |
Granted publication date: 20160518 Termination date: 20191228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |