CN101315194A - Smoke canal elbow flow guiding device - Google Patents
Smoke canal elbow flow guiding device Download PDFInfo
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- CN101315194A CN101315194A CNA2008101162116A CN200810116211A CN101315194A CN 101315194 A CN101315194 A CN 101315194A CN A2008101162116 A CNA2008101162116 A CN A2008101162116A CN 200810116211 A CN200810116211 A CN 200810116211A CN 101315194 A CN101315194 A CN 101315194A
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- plate
- guiding device
- elbow
- smoke canal
- arc plate
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Abstract
The invention provides a flue elbow flow-guide device for improving the effect of flow guide and flue gas distribution and reducing the cost. The flue elbow flow-guide device is arranged in the flue elbow position of a flue gas treatment system and is used for guiding the flue gas to flow through the flue elbow. The flue elbow flow-guide device (10) comprises a plurality of flow-guide plates which are arranged along the central line of the flue elbow. Each flow-guide plate comprises a small arc-shaped plate (3) and a downwind straight plate (4). The small arc-shaped plates are symmetrical about the central line of the flue elbow. The downwind straight plate is tangentially connected with the small arc-shaped plate at the downstream end of the small arc-shaped plate.
Description
Technical field
The present invention relates to the smoke canal elbow flow guiding device in a kind of smoke processing system, particularly relate to the guiding device of the selective catalytic reduction flue gas denitration system that is used for station boiler, combined cycle system waste heat boiler.
Background technology
SCR (SCR) gas denitrifying technology is putative denitrating flue gas mainstream technology, is widely used in the purified treatment of the power plant boiler flue gas of type fully.In each technology point of denitrating system, it is very crucial that velocity field is evenly distributed, and it is related to the degree that flue gas mixes with reducing agent and is reflected at the completeness that beds carries out, and directly affects the success or failure of a whole set of denitrification apparatus.The flue of whole denitrating system exists a plurality of elbows, how to allow flue gas through elbow, also still keeps velocity field even, is one of key point in the denitrating system design.The main flow deflector adopts big arc plate or three straight plate splicing schemes at present, big arc plate processing inconvenience, and straight plate splicing scheme crushing is bigger, and the water conservancy diversion effect is undesirable.
Summary of the invention
The present invention makes in view of the problem that exists in the above-mentioned existing guiding device, and its purpose is to provide a kind of smoke canal elbow flow guiding device that had not only promoted water conservancy diversion and flue gas even distribution effect but also reduced cost.
To achieve these goals, the invention provides a kind of smoke canal elbow flow guiding device, be arranged on the smoke canal elbow place of smoke processing system, flue gas channeling conduct to the smoke canal elbow of flowing through, this smoke canal elbow flow guiding device comprises the polylith deflector of arranging along the corner-centric line of described smoke canal elbow, it is characterized in that, each piece deflector comprises little arc plate and straight with the wind plate, described little arc plate is with respect to described corner-centric line symmetry, and described straight with the wind plate and little arc plate are connected the downstream of this little arc plate tangently.
According to this scheme, each piece deflector of forming guiding device is spliced by little arc plate and straight with the wind plate, so can by make respectively little arc plate and with the wind directly plate both are coupled together make deflector then, thus, reduce the difficulty of processing of deflector, reduced the cost of guiding device integral body.And, because straight with the wind plate and little arc plate are tangent,, reduced crushing so compare with straight plate splicing scheme of the prior art, can promote water conservancy diversion and flue gas even distribution effect.
Preferably, described deflector also comprises the straight plate that facings the wind that is connected the upstream extremity of little arc plate with little arc plate tangently.
Like this, by the effect of the straight plate that facings the wind, can further promote water conservancy diversion and flue gas even distribution effect.
Preferably, described smoke canal elbow is an elbow bend, and described little arc plate forms 1/4 circular arc.
More preferably, the polylith deflector is equally spaced evenly arranged.Thus, can further strengthen the flue gas even distribution effect.
Description of drawings
Fig. 1 represents that straight plate adds the guiding device that little arc plate adds straight plate scheme.
Fig. 2 represents that little arc plate adds the guiding device of straight plate scheme.
Fig. 3 is the velocity field cloud atlas of scheme shown in Figure 1.
Fig. 4 is the velocity field cloud atlas of scheme shown in Figure 2.
Description of reference numerals
1 smoke canal elbow, the 2 straight with the wind plate of straight plate, 3 little arc plates, 4 that facings the wind.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, guiding device 10 guiding that pending flue gas is flowed through and is arranged on smoke canal elbow 1 place, after cowling panel (not shown) rectification, flow to the catalyst bed (also not shown) in downstream as required again, in catalyst bed, carry out SCR (SCR) and nitre is removed.
In the first embodiment, in order to make the velocity of flue gas field even, be provided with the guiding device 10 that constitutes by the polylith deflector at smoke canal elbow 1 place in downstream distribution.As shown in Figure 1, every deflector comprises little arc plate 3, is connected the straight plate 2 and be connected the straight with the wind plate 4 of the downstream of little arc plate 3 of facining the wind of the upstream extremity of little arc plate 3.Little arc plate 3 is with respect to the corner-centric line symmetry of smoke canal elbow, and this corner-centric line is meant and connects the smoke canal elbow curved interior summit around the corner and the line on curved outside summit.Facing the wind straight plate 2 and straight with the wind plate 4 stretches out along the tangent line of little arc plate 3.
In the present embodiment, smoke canal elbow is an elbow bend, and in this case, little arc plate is 1/4 circular arc.For example, the radius of little arc plate 3 is between 600 to 800mm, and straight plate 2 length of facining the wind are 500mm, and straight with the wind plate 4 length are 1000mm.But the size of little arc plate and each straight plate can be decided according to the concrete size of the smoke canal elbow of practical application guiding device 10.
Shown in the arrow among Fig. 1, flue gas straight plate 2, little arc plate 3, the straight plate 4 with the wind of facining the wind of flowing through successively, thereby the speed that when being guided, obtains regulate, make the flue gas that flows out from guiding device have the even velocity field.
In the first embodiment, adopt each deflector of three plates splicing forecast scheme configuration, but the inventor utilizes Fluid Mechanics Computation (CFD) software to simulate discovery, removes the straight plate 2 that facings the wind and also can obtain good flue gas even distribution effect.Therefore, in second embodiment, saved the straight plate 2 that facings the wind, other structures are identical with first embodiment.
Fig. 3 and Fig. 4 show the water conservancy diversion and the flue gas even distribution effect of guiding device of the present invention.Wherein Fig. 3 is the velocity field cloud atlas of first embodiment, and Fig. 4 is the velocity field cloud atlas of second embodiment.
As shown in Figure 3, in the downstream of guiding device, velocity field is evenly distributed.And under the situation of second embodiment, although omitted the straight plate 2 that facings the wind, under the effect of little arc plate 3 and straight with the wind plate 4, as shown in Figure 4, still obtained and the essentially identical flue gas even distribution effect of first embodiment.
Above, just the situation that smoke canal elbow flow guiding device is applied in the flue gas denitrification system is illustrated, but be not limited to this, smoke canal elbow flow guiding device can be applied to anyly have smoke canal elbow and need carry out in water conservancy diversion and the uniform system, for example flue gas desulphurization system etc. flue gas.
Claims (4)
1. smoke canal elbow flow guiding device is arranged on the smoke canal elbow place of smoke processing system, and to the flue gas channeling conduct of the smoke canal elbow of flowing through, this smoke canal elbow flow guiding device comprises the polylith deflector of arranging along the corner-centric line of described smoke canal elbow, it is characterized in that,
Each piece deflector comprises little arc plate and straight with the wind plate,
Described little arc plate is with respect to described corner-centric line symmetry, and described straight with the wind plate and little arc plate are connected the downstream of this little arc plate tangently.
2. smoke canal elbow flow guiding device as claimed in claim 1 is characterized in that,
Described deflector also comprises the straight plate that facings the wind that is connected the upstream extremity of little arc plate with little arc plate tangently.
3. smoke canal elbow flow guiding device as claimed in claim 1 is characterized in that,
Described smoke canal elbow is an elbow bend, and described little arc plate forms 1/4 circular arc.
4. smoke canal elbow flow guiding device as claimed in claim 1 is characterized in that,
The polylith deflector is equally spaced evenly arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101162116A CN101315194A (en) | 2008-07-07 | 2008-07-07 | Smoke canal elbow flow guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101162116A CN101315194A (en) | 2008-07-07 | 2008-07-07 | Smoke canal elbow flow guiding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101315194A true CN101315194A (en) | 2008-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101162116A Pending CN101315194A (en) | 2008-07-07 | 2008-07-07 | Smoke canal elbow flow guiding device |
Country Status (1)
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| CN (1) | CN101315194A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567026B (en) * | 2009-06-05 | 2010-10-27 | 北京科技大学 | An optimal design method for the vibration-damping elbow of the flow-guiding structure of the infusion pipeline |
| CN104595918A (en) * | 2015-01-23 | 2015-05-06 | 中国电力工程顾问集团东北电力设计院有限公司 | Flue elbow with streamline type flow guide module |
| CN110043916A (en) * | 2019-04-22 | 2019-07-23 | 广东电网有限责任公司 | A kind of boiler flue and a kind of denitrating system |
| CN111336564A (en) * | 2020-04-08 | 2020-06-26 | 杭州老板电器股份有限公司 | Smoke collecting hood and range hood |
| CN112413622A (en) * | 2020-11-20 | 2021-02-26 | 西安热工研究院有限公司 | A flue structure and method for reducing ash deposition |
| CN112963854A (en) * | 2020-07-30 | 2021-06-15 | 山东大学 | Flue distributor with uniform temperature effect |
| CN112963853A (en) * | 2020-07-30 | 2021-06-15 | 山东大学 | Boiler system with flue distributor |
-
2008
- 2008-07-07 CN CNA2008101162116A patent/CN101315194A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567026B (en) * | 2009-06-05 | 2010-10-27 | 北京科技大学 | An optimal design method for the vibration-damping elbow of the flow-guiding structure of the infusion pipeline |
| CN104595918A (en) * | 2015-01-23 | 2015-05-06 | 中国电力工程顾问集团东北电力设计院有限公司 | Flue elbow with streamline type flow guide module |
| CN110043916A (en) * | 2019-04-22 | 2019-07-23 | 广东电网有限责任公司 | A kind of boiler flue and a kind of denitrating system |
| CN111336564A (en) * | 2020-04-08 | 2020-06-26 | 杭州老板电器股份有限公司 | Smoke collecting hood and range hood |
| CN111336564B (en) * | 2020-04-08 | 2024-08-16 | 杭州老板电器股份有限公司 | Fume collecting hood and range hood |
| CN112963854A (en) * | 2020-07-30 | 2021-06-15 | 山东大学 | Flue distributor with uniform temperature effect |
| CN112963853A (en) * | 2020-07-30 | 2021-06-15 | 山东大学 | Boiler system with flue distributor |
| CN112963854B (en) * | 2020-07-30 | 2021-12-21 | 山东大学 | A flue distributor with uniform temperature effect |
| CN112963853B (en) * | 2020-07-30 | 2021-12-21 | 山东大学 | A boiler system with flue distributor |
| CN112413622A (en) * | 2020-11-20 | 2021-02-26 | 西安热工研究院有限公司 | A flue structure and method for reducing ash deposition |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081203 |