CN105498971B - Air flow method system applied to wet cottrell - Google Patents
Air flow method system applied to wet cottrell Download PDFInfo
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- CN105498971B CN105498971B CN201610007870.0A CN201610007870A CN105498971B CN 105498971 B CN105498971 B CN 105498971B CN 201610007870 A CN201610007870 A CN 201610007870A CN 105498971 B CN105498971 B CN 105498971B
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- homogenizing plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/36—Controlling flow of gases or vapour
Abstract
The present invention discloses a kind of air flow method system applied to wet cottrell, including two pieces of homogenizing plates, it is the inlet air flow homogenizing plate set at air flow inlet and the exit flow homogenizing plate set in exit respectively, the inlet air flow homogenizing plate is non-equal-pressure-difference homogenizing plate, and the exit flow homogenizing plate is equal-pressure-difference homogenizing plate.The present invention solves the problems, such as deduster interior air-flow skewness, and more preferable compared to conventional airflow uniform distribution plate, energy-saving effect.
Description
Technical field
The present invention relates to field of gas purification, more particularly to a kind of air flow method system applied to wet cottrell
System.
Background technology
Wet cottrell is mainly used to remove containing the dirt in humid gas, acid mist, water droplet, aerosol, stink, PM2.5
It is thermal power plant and the emission reduction of commercial plant dust and the visual plant for realizing ultra-clean discharge etc. harmful substance, while is also some works
Important process equipment in process system.It is many to influence the factor of wet electrical dust precipitator efficiency of dust collection, such as nozzle organizational form, pole plate
Polar curve arrangement form, deduster C-V characteristic, airflow-distribution board form etc., wherein inlet and outlet airflow-distribution board is directly affected and removed
Air flow method characteristic in dirt device, and then the air velocity field distribution at each position inside deduster is affected, so as to influence air-flow
In the residence time of deduster, and finally influence the dust removing effects of deduster.Therefore construction is based on the new type of airflow for flowing principle
Distribution grid, for solving the problems, such as that the air-flow residence time of wet cottrell is inconsistent, caused dust collector efficiency, have non-
Often important meaning.
Current wet cottrell, based on 2 points of considerations on homogenizing plate method for arranging：First, entrance arrangement is equal
Flowing plate, and homogenizing plate is not arranged in exit, so as to ensure the Uniform Flow of air-flow；Arrange that homogenizing plate is taken at second point import
Equal-pressure-difference is arranged.So-called equal-pressure-difference arrangement refers under the premise of flox condition identical, and the homogenizing plate of different piece has identical
Drag characteristic, the external characteristic of performance is that homogenizing plate takes the pattern of uniform perforate.
For the first situation, as shown in figure 1, only installing homogenizing plate additional in entrance, and homogenizing plate is not installed additional in exit,
On the one hand the overall resistance of system can be reduced from the point of view of surface, equipment can be simplified in addition.But for running system,
Its follow-up circulation passage resistance situation can have resistance feedback to foregoing circulation passage, non-be flowed when follow-up circulation passage is present
During state, flow channel above is inevitably affected.Such a situation can be carried out schematically illustrate by Fig. 1.Can be with by Fig. 1
Find out, in this case, even if speed of incoming flow is uniform, but because the drag characteristic at follow-up reducing position is uneven,
So as to which the uneven of speed before reducing position can be caused.
For second of situation, equal-pressure-difference is taken to arrange homogenizing plate as shown in Fig. 2 being installed additional in porch, can be certain
The fluid velocity of uniform porch in degree.But after being arranged on reducing due to homogenizing plate, circumferentially direction, homogenizing plate
Speed of incoming flow is really what is differed, in this case, for different speed of incoming flow, the stream for taking same pressure differential to arrange
Plate, the gas velocity distribution character of homogenizing plate outlet can be influenceed, eventually influence the efficiency of deduster.
The content of the invention
For technical problem present in above-mentioned prior art, the present invention provides a kind of applied to wet cottrell
Air flow method system, solve the problems, such as that conventional airflow-distribution board effect is undesirable.
To reach above-mentioned purpose, the technical solution adopted in the present invention is as follows：
A kind of air flow method system applied to wet cottrell, including two pieces of homogenizing plates, flowed into gas respectively
The inlet air flow homogenizing plate set at mouthful and the exit flow homogenizing plate set in exit, the inlet air flow homogenizing plate right and wrong
Equal-pressure-difference homogenizing plate, the exit flow homogenizing plate are equal-pressure-difference homogenizing plates.
The exit flow homogenizing plate is to be based on uiform section principle, including several are divided by what center to surrounding was arranged successively
Cloth unit, the shape of each distribution unit is similar to the shape of monoblock homogenizing plate respectively, and area increases successively from inside to outside, so as to
Flow field after enough effectively counteractings caused by end section reducing is reverse, and the exit flow homogenizing plate and inlet air flow homogenizing plate are supporting
Use, ensure the uniformity of deduster interior flow field speed.
The inlet air flow homogenizing plate is non-equal-pressure-difference homogenizing plate, and its percent opening becomes larger from center to four the week side of boss, opened
Hole is square opening or lace type hole, preferably flows effect to be issued in less crushing, ensures in non-homogeneous operating mode
The uniformity of lower wet cottrell internal gas flow.
The size of each distribution unit of bore size and percent opening and homogenizing plate of the homogenizing plate, all in accordance with reality
Flow field characteristic carries out analysis calculating, and the simulation and optimization for carrying out flow field uniformity are modeled through flow field, obtains flowing the preferable shape of effect
Homogenizing plate parameter under state.
The pressure loss of the inlet air flow homogenizing plate and exit flow homogenizing plate is minimum so that the resistance before and after deduster
Minimum, the power input of dust pelletizing system is reduced, it is energy-saving.
Had the beneficial effect that caused by technical solution of the present invention：
(1) solve wet cottrell entrance equal-pressure difference type homogenizing plate and flow the bad deduster interior air-flow brought of effect
Skewness, the problem of causing dust removing effects bad.
(2) solve wet cottrell outlet and do not arrange that homogenizing plate or the undesirable flow field brought of homogenizing plate effect are inverse
To causing in deduster flow uneven, the problem of influenceing dust removing effects.
(3) in the case where make it that flow is evenly distributed in wet cottrell, the resistance of system, phase are hardly increased
It is more preferable than in other conventional airflow uniform distribution plates, energy-saving effect.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the air flow method structural representation one of prior art；
Fig. 2 is the air flow method structural representation two of prior art；
Fig. 3 is the air flow method structural representation one of the present invention；
Fig. 4 is the air flow method structural representation two of the present invention.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
As shown in figure 1, the air flow method structure one of prior art, only installs homogenizing plate 10 additional in entrance, and do not exporting
Place installs homogenizing plate additional, even if speed of incoming flow is uniform, but because the drag characteristic at follow-up reducing position is uneven, can cause
Speed is uneven before reducing position.
As shown in Fig. 2 the air flow method structure two of prior art, installs additional in porch and takes equal-pressure-difference to arrange homogenizing plate
20, can uniform porch to a certain extent fluid velocity.But after being arranged on reducing due to homogenizing plate, circumferentially
Direction, the speed of incoming flow of homogenizing plate is really what is differed, in this case, for different speed of incoming flow, is taken identical
The homogenizing plate of pressure difference arrangement, the gas velocity distribution character of homogenizing plate outlet can be influenceed, eventually influence the efficiency of deduster.
Air flow method system provided by the present invention applied to wet cottrell is specific as follows：
(1) based on uiform section operating mode principle structure deduster in etc. flow field operating condition design
The problem of causing deduster inner flow velocity inequality for resistance feedback present in foregoing prior art, utilize
Uiform section operating mode principle, the Flow Field Distribution inside deduster is reconstructed, and then ensure the velocity uniformity inside deduster, improved wet
The efficiency of dust collection of formula deduster.Based on uiform section operating mode principle, the reconstruct signal taken is as shown in Figure 3.
Exit flow homogenizing plate 2, including several distribution units for being arranged successively by center to surrounding, each distribution unit
Shape is similar to the shape of monoblock homogenizing plate respectively, and area increases successively from inside to outside.Distribution unit is generally three, can basis
Flow the effect increase of requirement or reduce.Percent opening and bore size in distribution unit is different, positioned at the distribution list of internal layer
The percent opening of member is smaller, is 40%~60%；Percent opening positioned at the distribution unit of outer layer is bigger, is 45%~65%；Perforate
For square opening or lace type hole.Flow field after the design can effectively be offset caused by end section reducing is reverse.
After the completion of design calculates, modeling in kind is carried out, simulation calculating is carried out to model, governing equation is conservation of mass side
Journey and momentum conservation equation, turbulent flow are calculated according to the simulation of revised κ-ξ turbulent flows.According to the result of simulation to design parameter
Optimize, obtain the design parameter of final outlet homogenizing plate.So that outlet gas flow equalization plate can be supported effectively
The flow field to disappear caused by the reducing of section is reverse, ensures the uniformity of deduster interior flow field speed, improves the efficiency of deduster.
(2) non-equal-pressure-difference homogenizing plate is built based on Study on Variable Condition Features principle
For the equal-pressure-difference homogenizing plate used in the prior art, due to Incoming gas, circumferentially direction, operating mode are to differ
, therefore, take equal-pressure-difference homogenizing plate to cause the heterogeneity of muzzle velocity.In such cases, non-equal-pressure-difference can be taken equal
Flowing plate, so as to ensure the uniformity of the exit flow under non-homogeneous operating mode.Take the purpose that non-equal-pressure-difference homogenizing plate is realized such as
Shown in Fig. 4, for realizing the uniformity of deduster internal gas flow.
Wet cottrell inlet air flow homogenizing plate 1 based on non-equal-pressure-difference, its percent opening from center to four the week side of boss by
Gradual change is big, and scope is 40%~65%, and perforate is square opening or lace type hole, to ensure that less crushing is issued to preferably
Flow effect.After the completion of design calculates, modeling in kind is carried out, simulation calculating is carried out to model, governing equation is the conservation of mass
Equation and momentum conservation equation, turbulent flow are calculated according to the simulation of revised κ-ξ turbulent flows.Design is joined according to the result of simulation
Number optimizes, and obtains the design parameter of final entrance homogenizing plate 1.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (4)
1. a kind of air flow method system applied to wet cottrell, it is characterised in that including two pieces of homogenizing plates, be respectively
The inlet air flow homogenizing plate set at air flow inlet and the exit flow homogenizing plate set in exit, the inlet air flow are equal
Flowing plate is non-equal-pressure-difference homogenizing plate, and the exit flow homogenizing plate is equal-pressure-difference homogenizing plate, the inlet air flow homogenizing plate right and wrong
Equal-pressure-difference homogenizing plate, its percent opening become larger from center to four the week side of boss；The exit flow homogenizing plate is former based on uiform section
Reason, including several distribution units for being arranged successively by center to surrounding, the shape of each distribution unit respectively with monoblock homogenizing plate
Shape it is similar, area increases successively from inside to outside, and percent opening in distribution unit and bore size are different, positioned at point of internal layer
The percent opening of cloth unit is smaller, is 40%~60%；Percent opening positioned at the distribution unit of outer layer is bigger, is 45%~65%,
Reverse so as to the flow field caused by end section reducing after effectively offsetting, the exit flow homogenizing plate flows with inlet air flow
Plate supports the use, and ensures the uniformity of deduster interior flow field speed；The equal-pressure-difference homogenizing plate refers to identical in flox condition
On the premise of, the homogenizing plate of different piece has identical drag characteristic.
2. the air flow method system according to claim 1 applied to wet cottrell, it is characterised in that enter implication
The perforate for flowing homogenizing plate is square opening or lace type hole, ensures the equal of under non-homogeneous operating mode wet cottrell internal gas flow
Even property.
3. the air flow method system according to claim 1 or 2 applied to wet cottrell, it is characterised in that
The size of each distribution unit of bore size and percent opening and homogenizing plate of flowing plate, is analyzed according to practical flow field characteristic
Calculate, the simulation and optimization for carrying out flow field uniformity are modeled through flow field, obtain flowing the homogenizing plate parameter under effect optimization state.
4. the air flow method system according to claim 3 applied to wet cottrell, it is characterised in that it is described enter
The percent opening of implication stream homogenizing plate becomes larger from center to four the week side of boss, and scope is 40%~65%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610007870.0A CN105498971B (en) | 2016-01-06 | 2016-01-06 | Air flow method system applied to wet cottrell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610007870.0A CN105498971B (en) | 2016-01-06 | 2016-01-06 | Air flow method system applied to wet cottrell |
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| CN105498971A CN105498971A (en) | 2016-04-20 |
| CN105498971B true CN105498971B (en) | 2018-02-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106733195B (en) * | 2016-12-23 | 2019-04-05 | 中国科学院过程工程研究所 | A kind of non-homogeneous printed line electro dust removing method and component and electric precipitator |
| CN109224796B (en) * | 2018-11-07 | 2021-02-26 | 浙江西安交通大学研究院 | Flue flow equalizer device and design method |
| CN113989218B (en) * | 2021-10-26 | 2022-05-20 | 东莞高绮印刷有限公司 | Double electrostatic dust collection method and device based on parameter prediction model |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB533197A (en) * | 1939-10-17 | 1941-02-07 | Res Corp Of New York | Improvements in or relating to apparatus for the electrical precipitation of suspended particles from gases |
| JP3572236B2 (en) * | 2000-02-25 | 2004-09-29 | 三菱重工業株式会社 | Electric dust collector |
| CN102061352B (en) * | 2010-12-15 | 2012-07-25 | 中冶南方工程技术有限公司 | Air flow distribution plate at inlet of electrostatic dust collector |
| CN202061730U (en) * | 2011-04-18 | 2011-12-07 | 钱蓓蓓 | Water-film electrostatic air cleaning device |
| CN202270576U (en) * | 2011-08-25 | 2012-06-13 | 杭州天明环保工程有限公司 | Electrostatic precipitator |
| CN202336388U (en) * | 2011-11-24 | 2012-07-18 | 杭州天明环保工程有限公司 | Overlapping type airflow distribution device of electrostatic dust collector |
| CN104549741A (en) * | 2013-10-29 | 2015-04-29 | 杭州天明环保工程有限公司 | Wet electrostatic dust collector |
| CN104525374B (en) * | 2014-12-26 | 2016-09-07 | 上海龙净环保科技工程有限公司 | Vertical current wet electrical dust precipitator carry effect device |
| CN205308580U (en) * | 2016-01-06 | 2016-06-15 | 上海超清环保科技有限公司 | Air flow distribution system for wet electrostatic precipitator |
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