CN204421032U - A kind of smoke canal elbow with streamlined water conservancy diversion module - Google Patents
A kind of smoke canal elbow with streamlined water conservancy diversion module Download PDFInfo
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- CN204421032U CN204421032U CN201520049380.8U CN201520049380U CN204421032U CN 204421032 U CN204421032 U CN 204421032U CN 201520049380 U CN201520049380 U CN 201520049380U CN 204421032 U CN204421032 U CN 204421032U
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- conservancy diversion
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Abstract
The utility model discloses a kind of smoke canal elbow with streamlined water conservancy diversion module, comprise elbow body, being provided with in elbow body with elbow body inner arc plate 3 is the arc deflector 1 of isocentric circular arc; Streamlined water conservancy diversion module 2 is also provided with in elbow, streamlined water conservancy diversion module 2 is made up of medial surface arc plate 6, upper arc plate 10, first flat board 7, lateral surface arc plate 8, second dull and stereotyped 9 and lower arc plate 11, medial surface arc plate 6 and elbow body inner arc plate 3 are isocentric circular arc, lateral surface arc plate 8 and elbow body outer arc plate 4 are isocentric circular arc, and the front and back ends of arc deflector and streamlined water conservancy diversion module is arranged in the front and back walls of elbow body.Smoke canal elbow of the present utility model, flue interior flow field can be made more even, and the pressure loss is little, and streamlined water conservancy diversion module had both served and supported flue effect, had taken into account water conservancy diversion effect simultaneously, had reduced the inside labyrinth of flue, reach the effect of energy-saving and emission-reduction.
Description
Technical field
The utility model relates to a kind of smoke canal elbow, particularly relates to a kind of smoke canal elbow with streamlined water conservancy diversion module.
Background technology
Coal fired thermal power plant cigarette air channel is used for the medium such as supplied flue gases, cold wind, and the running status of its design level on the resistance of cigarette ducting system and each equipment that is connected with cigarette air channel has great impact.The cigarette Duct design Main Basis of current power plant is design discipline, due to the impact by project progress requirement and design concept, design work often rest on meet regulatory requirements aspect on optimize qualitatively, and the mobility status do not made a concrete analysis of in body carries out refinement, optimal design.There is the many but optimal design research lacked this important spare part of elbow in the cigarette air channel of concrete power plant, these often make cigarette air duct flow field unstable, easily produce vibration, increase resistance, also will increase the energy consumption of complete auxiliaries further.
The cigarette air channel of power plant has the huge particularity of build, and in order to ensure the stable of flue structure, flue inside is often furnished with different inner support structure.Domestic electrical designing institute mainly contains the inner supporting structure (being called for short CE scheme) of inner supporting structure that standard flue specification (be called for short cigarette rule scheme) designs and U.S.'s combustion enginnering company designs now, see Fig. 1, complicated inner support structure adds the disorderly degree of flue interior flow field, increase the flue pressure loss, the key factor of aggravation distribution of exit velocities inhomogeneities.For the smoke canal elbow of rectangle, mostly be concentric circles and delay the racing elbow that turning head or inside and outside limit are fillet, the ratio of bending radius or inside and outside spring bilge radius and elbow import radial width is preferably: slow turning head, R/b=1 ~ 2; Racing elbow, r
w/ b=r
n/ b=0.4 ~ 0.6, sees Fig. 2.Carry out simulation respectively to slow turning head and racing elbow to find in identical import and export length, under the condition of identical inlet velocity, slow turning head flow field is relatively more even, and flow region form is more suitable for the flowing of flue gas in flue, sees Fig. 3.But zig zag head saves floor occupying area, more common in engineering type selection.If the advantage of the comprehensive two kinds of elbows of energy, designs marginal streamlined flue, may obtain better flow field.
Meanwhile, usually according to design discipline " DL5121-2000 thermal power plant cigarette wind pulverized coal channel designing technique code " in engineering, internally outside is the racing elbow inside installing guide vane of fillet, to slow turning head inside installing deflector.Although such design arrangement to improve in flow field the high velocity at turning, inner side and the low regime at outer turn place but conventional deflector thickness low LCL to a certain extent, the effect supporting flue can not be played.
Utility model content
The purpose of this utility model overcomes the deficiencies in the prior art, provides a kind of smoke canal elbow with streamlined water conservancy diversion module.
The technical solution of the utility model is summarized as follows:
With a smoke canal elbow for streamlined water conservancy diversion module, comprise elbow body, described elbow body is made up of elbow body inner arc plate 3, elbow body outer arc plate 4, elbow body antetheca and elbow body rear wall, in elbow body, be provided with arc deflector 1, arc deflector and elbow body inner arc plate 3 are isocentric circular arc, streamlined water conservancy diversion module 2 is also provided with in elbow, streamlined water conservancy diversion module 2 is by medial surface arc plate 6, upper arc plate 10, first flat board 7, lateral surface arc plate 8, second flat board 9 and lower arc plate 11 form, medial surface arc plate 6 and elbow body inner arc plate 3 are isocentric circular arc, lateral surface arc plate 8 and elbow body outer arc plate 4 are isocentric circular arc, one end of arc deflector 1 or the extended line of arc deflector 1 one end are positioned on the trisection line in flue outlet 5 cross section of elbow body, flue outlet 5 cross section orthogonal of the empty face that another trisection line in the center of circle of the upper arc plate 10 of streamlined water conservancy diversion module 2 and flue outlet 5 cross section of elbow body is formed and elbow body, the front end of arc deflector is arranged on the inner surface of elbow body antetheca, the rear end of arc deflector is arranged on the inner surface of elbow body rear wall, the front end of streamlined water conservancy diversion module is arranged on the inner surface of elbow body antetheca, the rear end of streamlined water conservancy diversion module is arranged on the inner surface of elbow body rear wall.
Advantage of the present utility model:
A kind of smoke canal elbow with streamlined water conservancy diversion module of the present utility model, flue interior flow field can be made more even, the pressure loss is little, streamlined water conservancy diversion module had both served and had supported flue effect, taken into account water conservancy diversion effect simultaneously, reduce the inside labyrinth of flue, improve rear portion connect the efficiency of dust collection of deduster, reach the effect of energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is inner support structure illustraton of model common at present; Wherein a is Chinese Industrial Standards (CIS) specification flue; B is CE scheme flue;
Fig. 2 is common rectangular flue plane, and wherein a is slow turning head; B is racing elbow;
Fig. 3 is vacant duct longitudinal central axis face velocity distribution map; Wherein a is slow turning head; B is racing elbow;
Fig. 4 is structural representation of the present utility model;
Fig. 5 is the schematic diagram of specific embodiment of the utility model;
Fig. 6 is that CE scheme supporting construction adds conventional deflector model schematic;
Fig. 7 is that CE scheme supporting construction adds conventional deflector contoured velocity figure;
Fig. 8 is the contoured velocity figure containing flue of the present utility model;
Fig. 9 is resistance calculation formulae containing flue of the present utility model and resistance coefficient fair curve.(1-is for cross-sectional aspect ratio: 0.5 for the viscous drag correction coefficient C ' relevant with section factor; 2-is for cross-sectional aspect ratio: 1; 3-is for cross-sectional aspect ratio: 2; 4-is for cross-sectional aspect ratio: 3).
Detailed description of the invention
Basic thought of the present utility model elbow body interior space is divided into three regions similar with the internal structure of slow turning head by arc deflector 1 and streamlined water conservancy diversion module 2, not only ensure that flue gas comparatively uniform flows, also replace internal overarm support to serve the effect of inner support simultaneously.Thus reduce inner support the bar pressure loss caused and the inequality that flows, improve the effect that smoke discharging effect finally reaches saving energy, lowering energy consumption and reducing pollutants discharge.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
With a smoke canal elbow for streamlined water conservancy diversion module, comprise elbow body, described elbow body is made up of elbow body inner arc plate 3, elbow body outer arc plate 4, elbow body antetheca and elbow body rear wall, in elbow body, be provided with arc deflector 1, arc deflector and elbow body inner arc plate 3 are isocentric circular arc, streamlined water conservancy diversion module 2 is also provided with in elbow, streamlined water conservancy diversion module 2 is by medial surface arc plate 6, upper arc plate 10, first flat board 7, lateral surface arc plate 8, second flat board 9 and lower arc plate 11 form, medial surface arc plate 6 and elbow body inner arc plate 3 are isocentric circular arc, lateral surface arc plate 8 and elbow body outer arc plate 4 are isocentric circular arc, one end of arc deflector 1 or the extended line of arc deflector 1 one end are positioned on the trisection line in flue outlet 5 cross section of elbow body, flue outlet 5 cross section orthogonal of the empty face that another trisection line in the center of circle of the upper arc plate 10 of streamlined water conservancy diversion module 2 and flue outlet 5 cross section of elbow body is formed and elbow body, the front end of arc deflector is arranged on the inner surface of elbow body antetheca, the rear end of arc deflector is arranged on the inner surface of elbow body rear wall, the front end of streamlined water conservancy diversion module is arranged on the inner surface of elbow body antetheca, the rear end of streamlined water conservancy diversion module is arranged on the inner surface of elbow body rear wall.See Fig. 4.
Below in conjunction with embodiment, the utility model is described in further detail.Embodiment of the present utility model understands the utility model better to enable those skilled in the art to, but do not impose any restrictions the utility model.
Embodiment 1
Smoke canal elbow inlet size with streamlined water conservancy diversion module is 3000mm × 9000mm, and outlet size is 3500mm × 9000mm, and other concrete sizes are referring to Fig. 5.Fig. 6 is the model that CE scheme supporting construction adds conventional deflector.
The design feature of embodiment of the present utility model by the sunykatuib analysis of computer CFD method, experimental result data and being analyzed as follows:
Computation model: as Fig. 5, Fig. 6.
Result of calculation:
Drag evaluation the results are shown in Table 1.
Table 1 is pressure loss percentage comparative result.
Table 1 pressure loss percentage comparative result
Above-mentioned analog result shows:
1. the utility model can reduce the pressure loss of flue, reduction by 61.7% compared with the flue of built-up pattern shown in Fig. 6, reduction by 48.5% compared with removing supporting construction and conventional deflector flue with built-up pattern shown in Fig. 6, reduction by 32.51% compared with removing supporting construction flue with built-up pattern shown in Fig. 6;
2. can find out from speed Flow Field Distribution figure contrast, the speed eddy current that flue gas is being formed containing flue of the present utility model is obviously few than traditional scheme, thus obtain more increasing containing flue of the present utility model the uniformity that flue gas flows in flue, specifically see Fig. 7, Fig. 8.
Through the display of computer CFD numerical simulation result, really can reach compare the better water conservancy diversion effect of traditional deflector containing Flue duct design of the present utility model, its pressure loss is compared traditional deflector and is reduced about about 61.7%.
Diversion component of the present utility model had both served and had supported flue effect, take into account water conservancy diversion effect simultaneously, reduced the inside labyrinth of flue, in elbow, completely eliminated original internal overarm support, the support of weak side is provided by externally reinforced rib, feasible through computer simulation pressure test.
In actual engineering design, according to the resistance coefficient fair curve of Fig. 9, only need the C in Partial Resistance coefficient formula to be multiplied by a correction factor C ' according to table values, the concrete numerical value of the pressure loss can be obtained.
Claims (1)
1. with a smoke canal elbow for streamlined water conservancy diversion module, comprise elbow body, described elbow body is made up of elbow body inner arc plate (3), elbow body outer arc plate (4), elbow body antetheca and elbow body rear wall, in elbow body, be provided with arc deflector (1), it is characterized in that arc deflector and elbow body inner arc plate (3) are isocentric circular arc, streamlined water conservancy diversion module (2) is also provided with in elbow, streamlined water conservancy diversion module (2) is by medial surface arc plate (6), upper arc plate (10), first flat board (7), lateral surface arc plate (8), second flat board (9) and lower arc plate (11) composition, medial surface arc plate (6) and elbow body inner arc plate (3) are isocentric circular arc, lateral surface arc plate (8) and elbow body outer arc plate (4) are isocentric circular arc, one end of arc deflector (1) or the extended line of arc deflector (1) one end are positioned on the trisection line in flue outlet (5) cross section of elbow body, flue outlet (5) cross section orthogonal of the empty face that another trisection line in the center of circle of the upper arc plate (10) of streamlined water conservancy diversion module (2) and flue outlet (5) cross section of elbow body is formed and elbow body, the front end of arc deflector is arranged on the inner surface of elbow body antetheca, the rear end of arc deflector is arranged on the inner surface of elbow body rear wall, the front end of streamlined water conservancy diversion module is arranged on the inner surface of elbow body antetheca, the rear end of streamlined water conservancy diversion module is arranged on the inner surface of elbow body rear wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520049380.8U CN204421032U (en) | 2015-01-23 | 2015-01-23 | A kind of smoke canal elbow with streamlined water conservancy diversion module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520049380.8U CN204421032U (en) | 2015-01-23 | 2015-01-23 | A kind of smoke canal elbow with streamlined water conservancy diversion module |
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| CN204421032U true CN204421032U (en) | 2015-06-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2015
- 2015-01-23 CN CN201520049380.8U patent/CN204421032U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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