CN103239944B - Self-cleaning and demisting device for vertical wet flue - Google Patents
Self-cleaning and demisting device for vertical wet flue Download PDFInfo
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- CN103239944B CN103239944B CN201310162273.1A CN201310162273A CN103239944B CN 103239944 B CN103239944 B CN 103239944B CN 201310162273 A CN201310162273 A CN 201310162273A CN 103239944 B CN103239944 B CN 103239944B
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Abstract
The invention discloses a self-cleaning and demisting device for a vertical wet flue. The self-cleaning and demisting device comprises a center fixing column and grading swirl blades, wherein the grading swirl blades are fixedly arranged on the center fixing column and are distributed along the circumferential direction of the center fixing column at intervals, the grading swirl blades comprise an upper blade and a lower blade, the upper blade and the lower blade are fixedly connected together or integrally formed, an included angle between the back surface of the upper blade and the main smoke flow direction is 45-85 DEG, an include angle between the back surface of the lower blade and the main smoke flow direction is 5-40 DEG, and the included angle between the back surface of the upper blade and the main smoke flow direction is more than that between the back surface of the lower blade and the main smoke flow direction. Compared with the prior art, the self-cleaning and demisting device has more excellent self-cleaning capacity and a better demisting effect.
Description
Technical field
The present invention relates to a kind of wet flue demister, particularly relate to the demister of the vertical wet flue after a kind of flue gas desulfurization, it is equally applicable to the wet flue demister in other gas dischargings.
Background technology
Along with the control criterion of national air environment protection treating improves day by day, wet desulfurization system becomes main flow.Simultaneously do not design GGH(flue gas one flue gas heat-exchange unit) desulphurization system also increasing, now flue gas enters the flue gas of chimney after desulphurization system is saturated flue gas.Because the design understanding for wet flue is not enough, domestic wet flue outlet flue gas drop carries phenomenon very generally, i.e. saturated flue gas pressure drop when chimney rises, adiabatic expansion makes flue gas cools down, forms some drops.Owing to containing dust, gypsum particle and acidic materials etc. in drop, larger adverse effect can be caused to power plant and surrounding enviroment, environmental hazard is caused to periphery; To wet flue outer wall without corrosion-resistant if be with corrosive drop to drop down to flow to simultaneously, outer surface burn into can be caused to damage, also affect the security of equipment.At present, demister uses the spiral-plate leaf 21 of routine as shown in Figure 2.In order to ensure except fog effect, the back side of spiral-plate leaf 21 and the angle in flue gas primary air direction require comparatively large (being generally more than 45 °).Flue gas directly with spiral-plate leaf 21 collision rift, the moisture in flue gas and solid impurity are bonded on spiral-plate leaf 21 because centrifugal action sticks, and drop presents and is uniformly distributed on whole spiral-plate leaf 21; When portion of water volatilizees, the fouling on the surface of spiral-plate leaf 21 of some solid impurity particles, will cause the apparent height fouling of spiral-plate leaf 21 in the short time.When fouling is serious, within 2-3 month, just need to clean spiral-plate leaf 21, in order to avoid impact is except fog effect.
Summary of the invention
The object of this invention is to provide a kind of swirl vane less scaling for the automatically cleaning classification cyclone defogger in vertical wet flue.
For achieving the above object, as a kind of technical scheme of the present invention, the present invention is used for the automatically cleaning demister of vertical wet flue and comprises center fixed leg and classification swirl vane, and classification swirl vane is fixedly installed on the fixed leg of center and centrally the circumference of fixed leg is spaced apart; Described classification swirl vane comprises blade and lower blade, described blade and lower blade are fixed together or one-body molded, wherein, the back side of blade and the angle in flue gas primary air direction are 45-85 °, the back side of lower blade and the angle in flue gas primary air direction are 5-40 °, and the angle in the back side of blade and flue gas primary air direction is greater than the back side of lower blade and the angle in flue gas primary air direction.
As another kind of technical scheme of the present invention, the present invention is used for the automatically cleaning demister of vertical wet flue and comprises center fixed leg and classification swirl vane, and classification swirl vane is fixedly installed on the fixed leg of center and centrally the circumference of fixed leg is spaced apart; Described classification swirl vane is made up of blade and lower blade, described blade and lower blade are fixed together or one-body molded, wherein, the back side of blade and the angle in flue gas primary air direction are 45-85 °, the back side of lower blade and the angle in flue gas primary air direction are 5-40 °, and the angle in the back side of blade and flue gas primary air direction is greater than the back side of lower blade and the angle in flue gas primary air direction.
Further, the back side of blade of the present invention and the back side of the angle in flue gas primary air direction than lower blade and large more than 15 ° of the angle in flue gas primary air direction.
Further, the back side of blade of the present invention and the angle in flue gas primary air direction are 50-70 °, and the back side of lower blade and the angle in flue gas primary air direction are 10-30 °.
Compared with prior art, the invention has the beneficial effects as follows:
Because swirl vane adopts the grading design of blade and lower blade, and form a knuckle in the critical part of upper and lower blade, the eddy current effect that knuckle produces makes fume centralized peel off at the connection transition region generation drop of classification swirl vane, simultaneously, the flue gas lift brought that rises can make swirl vane rotate around central fixed shaft, further enhancing the automatically cleaning effect of swirl vane.In addition, the angle in the back side of spiral-plate leaf and flue gas primary air direction comparatively large (being generally more than 45 °) is required except fog effect in order to ensure relative to swirl vane conventional in prior art, after the present invention adopts classification swirl vane, allow the angle in the back side of lower blade and flue gas primary air direction little of 5 °, not only guide the drop in flue gas to concentrate on thus and connect the appearance stripping of transition region II place, and, concentrate on the impact of eddy current effect owing to bringing by the knuckle that formed between blade and lower blade of the flue gas that connects transition region II, more be conducive to the precipitation of drop in flue gas, the present invention is had unforeseeable better except fog effect.Automatically cleaning demister of the present invention can improve the environmental aspect of power plant and periphery greatly, has good Social benefit and economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of automatically cleaning demister of the present invention, wherein, the installation relation schematic diagram that (a) is classification swirl vane and center fixed leg, (b) is the structural representation of classification swirl vane;
Fig. 2 is the structural representation of conventional spiral-plate leaf in prior art;
Fig. 3 is the fundamental diagram of automatically cleaning demister of the present invention;
Fig. 4 is the scheme of installation of automatically cleaning demister of the present invention in flue;
In figure, 1. center fixed leg, 2. blade, 3. lower blade, 4. wet flue, 21. spiral-plate leafs.
Detailed description of the invention
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Fig. 1 (a), Fig. 1 (b) He Fig. 4, automatically cleaning demister of the present invention is installed in vertical wet flue 4.Automatically cleaning demister of the present invention comprises center fixed leg 1 and classification swirl vane.Center fixed leg 1 can adopt solid or hollow cylinder structure.The circumference of classification swirl vane centrally fixed leg 1 is spaced apart, is preferably uniformly distributed.The quantity of classification swirl vane is preferably 6-12 sheet.Classification swirl vane comprises blade 2 and lower blade 3.As wherein a kind of embodiment of the present invention, classification swirl vane can only be made up of blade 2 and lower blade 3.Blade 2 and lower blade 3 are fixed together or one-body molded.Blade 2 and lower blade 3 all have two faces: front (i.e. smoke-shock face) and the back side.Wherein, front refers to the windward side that blade is directly subject to flue gas primary air and washes away, and the back side then refers to the lee face of blade contrary to the positive.The back side of blade 2 and the angle in flue gas primary air direction are greater than the back side of lower blade 3 and the angle in flue gas primary air direction.The back side of blade 2 and the angle in flue gas primary air direction are 45-85 °, and optimized angle is 50-70 °.The back side of lower blade 3 and the angle in flue gas primary air direction are 5-40 °, and optimized angle is 10-30 °.Consider that the droplet erosion in vertical wet flue 4 is comparatively strong, the preferred FRP of material of classification swirl vane or titanium steel material.
See Fig. 3, in apparatus of the present invention, due to the back side of lower blade 3 and the angle less (can be 5-40 °) in flue gas primary air direction, when flue gas rise to contact with lower blade 3 time, lower blade 3 pairs of flue gases produce stronger drainage effect, and the centrifugal force produced due to lower blade 3 is less, make the drop risen in the flue gas of lower blade 3 be not easy to be stripped out from flue gas, lower blade 3 is therefore cleaner.In addition, because the back side of blade 2 is different from the angle in the angle in flue gas primary air direction and the back side of lower blade 3 and flue gas primary air direction, thus form a knuckle in the critical part of blade 2 and lower blade 3, when flue gas carry drop by lower blade 3 continue to climb the connection transition region II being raised to classification swirl vane time, the angle of climbing of flue gas diminishes suddenly, the eddy current effect produced by centrifugal force and knuckle affects, and the drop in flue gas is concentrated at connection transition region II place and occurred peeling off.As shown in Figure 3, connect the bottom that transition region II is positioned at blade 2, the initiating terminal connecting transition region II is then positioned at the junction (that is critical part of blade 2 and lower blade 3) of lower blade 3 and blade 2.In addition, the flue gas that the direction directly to blade 2 rises, due to the impact of the eddy current effect that the knuckle be subject between upper and lower blade produces, also converges to connection transition region II, and then makes the drop in flue gas connect transition region II stripping.Thus, the drop that dissociates of the overwhelming majority in flue gas is collected in solid impurity and is connected in transition region II.
Transition region II is connected because the water droplet in flue gas concentrates on the precipitation region of solid impurity, the moisture connecting transition region II is made to be not easy to be gathered together formation liquid stream by evaporating, finally make solid impurity be carried with the flowing of liquid stream and leave blade surface, make the present invention obtain remarkable automatically cleaning ability.In addition, flue gas can drive classification swirl vane to rotate around central fixed shaft 1 by the lift produced during apparatus of the present invention, and the centrifugal force produced in rotary course can strengthen the automatically cleaning effect of classification swirl vane further.The scaling rate of classification swirl vane of the present invention is only 1/12 of conventional swirl vane 21, in other words, classification swirl vane of the present invention be equivalent to 2-3 just needs clean once.
On the other hand, in the prior art, in order to ensure except fog effect, the conventional back side of swirl vane 21 and the angle in flue gas primary air direction require comparatively large (being generally more than 45 °).And after the present invention adopts classification swirl vane, the back side of lower blade 3 and the angle in flue gas primary air direction allow little of 5 °, under the impact of the eddy current effect that the knuckle making the flue gas guiding to connection transition region II be formed between blade and lower blade thus brings, more be conducive to the precipitation of drop in flue gas, the present invention is had better except fog effect.
Although describe the preferred embodiments of the present invention by reference to the accompanying drawings above, but those skilled in the art should recognize, the present invention should not be limited to the particular content of above-described embodiment, when not departing from the spirit and scope of the invention that claims limit, various modification and improvement can be made to above-described embodiment.
Claims (4)
1. for an automatically cleaning demister for vertical wet flue, it is characterized in that: comprise center fixed leg and classification swirl vane, classification swirl vane is fixedly installed on the fixed leg of center and centrally the circumference of fixed leg is spaced apart; Described classification swirl vane comprises blade and lower blade, described blade and lower blade are fixed together or one-body molded, wherein, the back side of blade and the angle in flue gas primary air direction are 45-85 °, the back side of lower blade and the angle in flue gas primary air direction are 5-40 °, and the angle in the back side of blade and flue gas primary air direction is greater than the back side of lower blade and the angle in flue gas primary air direction.
2. for an automatically cleaning demister for vertical wet flue, it is characterized in that: comprise center fixed leg and classification swirl vane, classification swirl vane is fixedly installed on the fixed leg of center and centrally the circumference of fixed leg is spaced apart; Described classification swirl vane is made up of blade and lower blade, described blade and lower blade are fixed together or one-body molded, wherein, the back side of blade and the angle in flue gas primary air direction are 45-85 °, the back side of lower blade and the angle in flue gas primary air direction are 5-40 °, and the angle in the back side of blade and flue gas primary air direction is greater than the back side of lower blade and the angle in flue gas primary air direction.
3. automatically cleaning demister according to claim 1 and 2, is characterized in that: the back side of described blade and the back side of the angle in flue gas primary air direction than lower blade and large more than 15 ° of the angle in flue gas primary air direction.
4. automatically cleaning demister according to claim 1 and 2, is characterized in that: the back side of described blade and the angle in flue gas primary air direction are 50-70 °, and the back side of lower blade and the angle in flue gas primary air direction are 10-30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310162273.1A CN103239944B (en) | 2013-05-06 | 2013-05-06 | Self-cleaning and demisting device for vertical wet flue |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310162273.1A CN103239944B (en) | 2013-05-06 | 2013-05-06 | Self-cleaning and demisting device for vertical wet flue |
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| Publication Number | Publication Date |
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| CN103239944A CN103239944A (en) | 2013-08-14 |
| CN103239944B true CN103239944B (en) | 2015-02-25 |
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| CN201310162273.1A Active CN103239944B (en) | 2013-05-06 | 2013-05-06 | Self-cleaning and demisting device for vertical wet flue |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105275542B (en) * | 2015-12-04 | 2019-01-11 | 广西玉柴机器股份有限公司 | Rebreather of engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5795548A (en) * | 1996-03-08 | 1998-08-18 | Mcdermott Technology, Inc. | Flue gas desulfurization method and apparatus |
| CN2539857Y (en) * | 2002-01-28 | 2003-03-12 | 杨圣安 | Vane of heat-radiating fan |
| CN203235343U (en) * | 2013-05-06 | 2013-10-16 | 浙江浙大网新机电工程有限公司 | Self-cleaning demisting device for vertical wet flue |
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2013
- 2013-05-06 CN CN201310162273.1A patent/CN103239944B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5795548A (en) * | 1996-03-08 | 1998-08-18 | Mcdermott Technology, Inc. | Flue gas desulfurization method and apparatus |
| CN2539857Y (en) * | 2002-01-28 | 2003-03-12 | 杨圣安 | Vane of heat-radiating fan |
| CN203235343U (en) * | 2013-05-06 | 2013-10-16 | 浙江浙大网新机电工程有限公司 | Self-cleaning demisting device for vertical wet flue |
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| CN103239944A (en) | 2013-08-14 |
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Address after: 310051 Room 1501, 4 New Shuangcheng Building, No. 1785 Jianghan Road, Changhe Street, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Zhejiang ZheDaNet New Mechatronics Technology Group Co., Ltd. Address before: Room 901-H, Zhongrong Building, Tianmushan Road, Hangzhou City, Zhejiang Province Patentee before: Insigma Mechanical & Electrical Engineering Co.,Ltd. |