CN102284360A - Method for determining trapping efficiency of electrostatic dust collector on inhalable particulate matters (PM10) - Google Patents

Method for determining trapping efficiency of electrostatic dust collector on inhalable particulate matters (PM10) Download PDF

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CN102284360A
CN102284360A CN2011102369642A CN201110236964A CN102284360A CN 102284360 A CN102284360 A CN 102284360A CN 2011102369642 A CN2011102369642 A CN 2011102369642A CN 201110236964 A CN201110236964 A CN 201110236964A CN 102284360 A CN102284360 A CN 102284360A
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efficiency
dust
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electrostatic precipitator
dust collecting
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CN102284360B (en
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张建平
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Shanghai University of Electric Power
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Shanghai University of Electric Power
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Abstract

The invention relates to a method for determining the trapping efficiency of an electrostatic dust collector on inhalable particulate matters (PM10). The method comprises the following steps of: with a simplified model of a wiring board electrostatic dust collector as a research object, counting electric charges of an electric field and diffusion electric charges and establishing a mathematical model of an internal flow field, the electric field and a partical size field of the electrostatic dust collector by a FLUENT loading model and a customized function; and performing numerical calculation by a finite volume method (FVM), calculating the grading efficiency of PM10 partical groups by a Deutsch-Anderson method, and performing Weibull distribution fitting on the grading efficiency of the PM10 partical groups by a least square method with curves of changed partical sizes of particles. According to verification, the fitting method is high in accuracy and can be used as the reference of the method for calculating the trapping efficiency of the electrostatic dust collector on PM10, and the predictability of the dust collection efficiency is improved greatly.

Description

Definite method of electrostatic precipitator pellet PM10 arresting efficiency
Technical field
The present invention relates to a kind of environment pollution technology problem, particularly a kind of definite method of electrostatic precipitator pellet PM10 arresting efficiency.
Background technology
Along with developing rapidly of industry, pellet (PM10) pollutes increasingly serious.PM10 not only can reduce air quality, causes global climate and changes, but also can bring out the human body various diseases.Electrostatic precipitator has higher arresting efficiency to PM10, yet PM10 has still occupied very big proportion in the ESP discharged particle, and is very important to the research that PM10 among the ESP captures.Chinese scholars captures at electrostatic precipitator PM10 and has carried out a series of work at present, and the characteristic that utilize various method, electrostatic precipitator PM10 is captured from different sides is explored.
Summary of the invention
The present invention be directed to existing pellet (PM10) and pollute increasingly serious problem, a kind of definite method of electrostatic precipitator pellet PM10 arresting efficiency has been proposed, theoretical research and engineering background in conjunction with domestic and international electrostatic precipitator, set up the Mathematical Modeling of electrostatic precipitator PM10 arresting efficiency, use the Deutsch-Anderson method and calculated the PM10 classification efficiency, and based on this PM10 classification efficiency change curve has been carried out the Weibull distribution match, this approximating method precision height of empirical tests.
Technical scheme of the present invention is: a kind of definite method of electrostatic precipitator pellet PM10 arresting efficiency, and method comprises following concrete steps:
1) set up model: the electric field of the board-like electrostatic precipitator passage of line by two groups of parallel dust collecting pole plates and be positioned at its Centromedian one row equally spaced corona wire form, choose the passage dust collecting pole plate as simulated object;
2) with dust collecting pole plate along being divided on the airflow direction
Figure 244941DEST_PATH_IMAGE001
Section, wherein
Figure 298347DEST_PATH_IMAGE002
By the decision of the granule number under the particle diameter that is captured on the dust collecting pole plate, definition Be
Figure 494153DEST_PATH_IMAGE004
The length of dust collecting pole plate section:
Figure 52174DEST_PATH_IMAGE005
In the formula,
Figure 706009DEST_PATH_IMAGE006
Be along on the airflow direction, begin counting from the inlet of electrostatic precipitator electric field, the
Figure 400295DEST_PATH_IMAGE007
The abscissa value of certain the particle diameter particle landing point on dust collecting pole plate that is captured, in addition, when
Figure 317436DEST_PATH_IMAGE008
The time,
Figure 408758DEST_PATH_IMAGE009
When
Figure 803967DEST_PATH_IMAGE010
The time,
Figure 618339DEST_PATH_IMAGE011
3) electric field is about corona wire place central shaft symmetry, choose symmetry axis upside half-plane as the zoning, use GAMBIT software that the zoning is comprised that grid is divided in interior dispersing, be divided into structured grid, the further refinement of grid is carried out near the high zone of the voltage gradient corona wire;
4)
Figure 503118DEST_PATH_IMAGE012
The particle diameter dust is
Figure 770152DEST_PATH_IMAGE004
Efficiency of dust collection in the dedusting section
Figure 969052DEST_PATH_IMAGE013
Can be expressed as:
Figure 450980DEST_PATH_IMAGE014
In the formula,
Figure 444344DEST_PATH_IMAGE015
Be
Figure 198673DEST_PATH_IMAGE012
The migration velocity of particle diameter dust;
Figure 998002DEST_PATH_IMAGE016
Be
Figure 521387DEST_PATH_IMAGE004
The dedusting area of dedusting section correspondence,
Figure 262816DEST_PATH_IMAGE017
Be flue gas flow,
Figure 779565DEST_PATH_IMAGE019
Figure 485353DEST_PATH_IMAGE020
Be the distance between corona wire and dust collecting pole plate;
Figure 820519DEST_PATH_IMAGE021
Height for the electrostatic precipitator electric field;
Figure 549441DEST_PATH_IMAGE022
Be the porch flue gas flow rate, will
Figure 441304DEST_PATH_IMAGE017
With
Figure 939282DEST_PATH_IMAGE019
The substitution following formula, can simplify
Figure 710929DEST_PATH_IMAGE023
Formula:
Figure 723884DEST_PATH_IMAGE024
The
Figure 606390DEST_PATH_IMAGE012
The particle diameter dust is along the efficiency of dust collection on the whole dust collecting pole plate length, i.e. grade dust-collection efficiency
Figure 958873DEST_PATH_IMAGE025
, can be expressed as:
Figure 213006DEST_PATH_IMAGE026
, in the formula,
Figure 650941DEST_PATH_IMAGE027
Be
Figure 71558DEST_PATH_IMAGE028
In the area of space of dedusting section correspondence, the
Figure 606444DEST_PATH_IMAGE012
The granule density of particle diameter dust, when
Figure 719894DEST_PATH_IMAGE029
The time,
Figure 645124DEST_PATH_IMAGE030
, represent of electrostatic precipitator porch
Figure 682482DEST_PATH_IMAGE012
Particle diameter dust granules concentration;
5) establish classification efficiency
Figure 743979DEST_PATH_IMAGE031
With grain diameter The curve that changes satisfies Weibull distribution:
Figure 503173DEST_PATH_IMAGE033
In the formula:
Figure 531172DEST_PATH_IMAGE031
Be that electrostatic precipitator is to different-grain diameter
Figure 24339DEST_PATH_IMAGE032
The grade dust-collection efficiency of particle,
Figure 214012DEST_PATH_IMAGE034
,
Figure 113835DEST_PATH_IMAGE035
Be respectively the minimum of a value and the corresponding classification efficiency of grain diameter;
Figure 742262DEST_PATH_IMAGE036
,
Figure 43931DEST_PATH_IMAGE037
Form parameter and scale parameter for Weibull distribution;
6) formula in the step 5) is carried out letter and carry out least square fitting again after linear, obtain the form parameter of Weibull distribution
Figure 404505DEST_PATH_IMAGE038
And scale parameter
Figure 604673DEST_PATH_IMAGE037
, just can determine the speed displacement curve;
7) according to the speed displacement curve of determining, obtain classification efficiency
Figure 974475DEST_PATH_IMAGE039
With grain diameter
Figure 865070DEST_PATH_IMAGE040
The curve fitting formula that changes is:
Figure 724442DEST_PATH_IMAGE041
, try to achieve classification efficiency
Figure 333278DEST_PATH_IMAGE039
With grain diameter
Figure 506770DEST_PATH_IMAGE042
The curve that changes.
Beneficial effect of the present invention is: definite method of a kind of electrostatic precipitator pellet of the present invention PM10 arresting efficiency, set up the Mathematical Modeling of electrostatic precipitator PM10 arresting efficiency, use the Deutsch-Anderson method and calculated the PM10 classification efficiency, and based on this PM10 classification efficiency change curve has been carried out the Weibull distribution match, this approximating method precision height of empirical tests, can be used as the reference of electrostatic precipitator PM10 arresting efficiency computational methods, improve the predictability of efficiency of dust collection greatly.
Description of drawings
Fig. 1 is the designs simplification illustraton of model of the board-like electrostatic precipitator electric field of line;
Fig. 2 is that the grid of the board-like electrostatic precipitator part of line electric field is divided figure;
Fig. 3 is variation and the Weibull fitted figure of classification efficiency of the present invention with particle diameter.
The specific embodiment
Finding the solution of electrostatic precipitator PM10 arresting efficiency:
Finding the solution at first: the basic conservation equation of flow field, particle field and electric field: mass-conservation equation, momentum conservation equation, current continuity equation and Poisson's equation to electrostatic precipitator flow field, particle field and electric field, for the ease of above-mentioned governing equation is analyzed, set up the common version of governing equation.With
Figure 852473DEST_PATH_IMAGE043
The expression common variable, governing equation can be expressed as:
Figure 820429DEST_PATH_IMAGE044
(1)
In the formula,
Figure 916561DEST_PATH_IMAGE045
---atmospheric density;
Figure 690482DEST_PATH_IMAGE043
---common variable, can represent all directions velocity component;
Figure 555670DEST_PATH_IMAGE046
---the broad sense diffusion coefficient;
Figure 694528DEST_PATH_IMAGE047
---the broad sense source item,
Figure 91005DEST_PATH_IMAGE048
---Hamiltonian.Every transient term, convective term, diffusion term and source item of being followed successively by in the formula, for specific equation,
Figure 340721DEST_PATH_IMAGE043
,
Figure 325994DEST_PATH_IMAGE046
,
Figure 698070DEST_PATH_IMAGE047
Also has specific forms.For continuity equation, get
Figure 768794DEST_PATH_IMAGE049
For the equation of momentum, get
Figure 822201DEST_PATH_IMAGE050
,
Figure 973565DEST_PATH_IMAGE051
,
Figure 454225DEST_PATH_IMAGE052
Be all directions velocity component; For two equations
Figure 808983DEST_PATH_IMAGE053
Turbulence model, For the current continuity equation, get
Figure 360367DEST_PATH_IMAGE055
For Poisson's equation, get
Figure 824978DEST_PATH_IMAGE056
Figure 870294DEST_PATH_IMAGE057
,
Figure 265503DEST_PATH_IMAGE058
The index span is (1,2,3),
Figure 876613DEST_PATH_IMAGE046
,
Figure 964655DEST_PATH_IMAGE047
According to And decide.
Adopt limited bulk discrete to governing equation (1), according to computing grid, at the control volume
Figure 742173DEST_PATH_IMAGE059
And the time period (time from Arrive ) upper integral and introduce the Guass divergence theorem, the conservation equation common version of then finding the solution integrated form is as follows:
Figure 958073DEST_PATH_IMAGE063
(2)
First on the formula left side shows variable
Figure 481459DEST_PATH_IMAGE043
Total amount amount over time in the control volume, second on left side expression variable
Figure 724352DEST_PATH_IMAGE043
Because of convection current cause along control volume surface exterior normal direction
Figure 700399DEST_PATH_IMAGE064
Discharge rate.First on the right is the integration of diffusion term---the control volume internal variable has a net increase of dosage because of what diffusion caused, and second on the right is the integration of source item---in the control volume because the variable that generation, dissipation or other reasons source item cause has a net increase of dosage, ---vorticity,
Figure 946889DEST_PATH_IMAGE066
Therefore, under the situation of setting inlet flow velocity and operating voltage, carry out iterative by (2) formula, satisfy continuity equation until the velocity field of trying to achieve, draw this each particle y constantly to the calculated value of speed, and migration velocity calculates the classification efficiency of electrostatic precipitator to PM10 thus as the particle migration velocity
Figure 282055DEST_PATH_IMAGE067
Secondly finding the solution efficiency of dust collection: with dust collecting pole plate along being divided on the airflow direction
Figure 10977DEST_PATH_IMAGE068
Section, wherein
Figure 401376DEST_PATH_IMAGE069
Determine by the granule number under certain particle diameter that is captured on the dust collecting pole plate.Certainly, section is obtained intensive more, and counting accuracy is good more.Definition
Figure 899353DEST_PATH_IMAGE070
Be
Figure 405421DEST_PATH_IMAGE071
The length of dust collecting pole plate section:
Figure 683956DEST_PATH_IMAGE072
(3)
In the formula,
Figure 566461DEST_PATH_IMAGE073
Be along on the airflow direction, begin counting from the inlet of electrostatic precipitator electric field, the
Figure 918945DEST_PATH_IMAGE007
The abscissa value of certain the particle diameter particle landing point on dust collecting pole plate that is captured.In addition, when
Figure 674543DEST_PATH_IMAGE074
The time,
Figure 112477DEST_PATH_IMAGE009
When
Figure 533094DEST_PATH_IMAGE075
The time,
Figure 67981DEST_PATH_IMAGE011
The
Figure 915851DEST_PATH_IMAGE012
The particle diameter dust is
Figure 841082DEST_PATH_IMAGE071
Efficiency of dust collection in the dedusting section
Figure 376974DEST_PATH_IMAGE013
Can be expressed as:
Figure 704050DEST_PATH_IMAGE014
(4)
In the formula,
Figure 50718DEST_PATH_IMAGE076
Be
Figure 463245DEST_PATH_IMAGE012
The migration velocity of particle diameter dust (or velocity of approach) is usually than the speed on the smoke inlet flow velocity direction
Figure 225664DEST_PATH_IMAGE077
Low order of magnitude;
Figure 220296DEST_PATH_IMAGE016
Be
Figure 675548DEST_PATH_IMAGE071
The dedusting area of dedusting section correspondence,
Figure 575371DEST_PATH_IMAGE017
Figure 203799DEST_PATH_IMAGE018
Be flue gas flow,
Figure 239888DEST_PATH_IMAGE019
Figure 866041DEST_PATH_IMAGE020
Be the distance between corona wire and dust collecting pole plate;
Figure 564745DEST_PATH_IMAGE078
Height for the electrostatic precipitator electric field;
Figure 668967DEST_PATH_IMAGE079
Be the porch flue gas flow rate.
Will
Figure 825142DEST_PATH_IMAGE080
With
Figure 684513DEST_PATH_IMAGE019
The substitution following formula, can simplify
Figure 106399DEST_PATH_IMAGE013
Formula:
Figure 279891DEST_PATH_IMAGE081
(5)
So,
Figure 290572DEST_PATH_IMAGE012
The particle diameter dust is along the efficiency of dust collection on the whole dust collecting pole plate length, i.e. grade dust-collection efficiency
Figure 320845DEST_PATH_IMAGE082
(or classification efficiency) can be expressed as:
Figure 416977DEST_PATH_IMAGE026
(6)
In the formula,
Figure 174587DEST_PATH_IMAGE027
Be
Figure 305354DEST_PATH_IMAGE004
In the area of space of dedusting section correspondence, the
Figure 506528DEST_PATH_IMAGE012
The granule density of particle diameter dust.When
Figure 89956DEST_PATH_IMAGE083
The time,
Figure 339672DEST_PATH_IMAGE030
, represent of electrostatic precipitator porch
Figure 137994DEST_PATH_IMAGE012
Particle diameter dust granules concentration.At last, according to the efficiency of dust collection of passage list of electrostatic precipitator electric field to the efficiency of dust collection calculated value estimation whole audience of dust collecting pole plate.
The application software solution procedure:
At first the foundation of model with find the solution discrete region: the electric field of the single passage of the board-like electrostatic precipitator of line is by two groups of parallel dust collecting pole plates 1 and be positioned at the equally spaced corona wire 2 of its Centromedian row and form, choose be positioned at the passage forefront a pair of dust collecting pole plate as simulated object, as shown in Figure 1.Choose corona wire to the distance between dust collecting pole plate
Figure 447753DEST_PATH_IMAGE084
, the corona wire spacing
Figure 518477DEST_PATH_IMAGE085
, the corona wire radius
Figure 634201DEST_PATH_IMAGE086
The flue gas level flows into, and level flows out.
Because electric field about corona wire place central shaft symmetry, is chosen symmetry axis upside half-plane as the zoning.Use GAMBIT software to be dispersed in the zoning, be divided into The structured grid of individual control volume.Voltage gradient is very high near the corona wire, special must be with the further refinement of this area grid.Grid in the first quartile of zoning, as shown in Figure 2.
Secondly the setting of boundary condition: it has been generally acknowledged that the fully development of porch turbulent flow, inlet air flow evenly distributes on the cross section, adopts speed import boundary condition.No slip boundary condition is adopted on the dust collecting pole plate surface, and near wall place viscous effect strengthens, and the DIFFUSION IN TURBULENCE effect weakens, thereby adopts the standard law of wall function method.Dust granules is discrete to be escape at the boundary condition that enters the mouth with the exit, and the corona wire surface is reflection, and the dust collecting pole plate surface is to catch.Think that space charge density is a constant, the space charge density boundary condition of import, outlet, corona wire surface and dust collecting pole plate inner surface is set to
Figure 954641DEST_PATH_IMAGE088
The board-like electrostatic precipitator boundary condition of line line as shown in table 1 board-like (spool formula) electrostatic precipitator boundary condition.
Table 1
? X-speed Y-speed Operating voltage Space charge density The particle phase
Advance
Figure 558666DEST_PATH_IMAGE089
Figure 415764DEST_PATH_IMAGE090
Figure 110050DEST_PATH_IMAGE091
Figure 761612DEST_PATH_IMAGE092
 Escape
Go out Pressure Pressure
Figure 869245DEST_PATH_IMAGE091
Figure 264454DEST_PATH_IMAGE092
 Escape
Corona wire No slip No slip
Figure 813247DEST_PATH_IMAGE093
 Reflect
Dust collecting pole plate No slip No slip
Figure 981371DEST_PATH_IMAGE094
 Trap
Particle diameter under the Weibull Function-classification efficiency curve match:
Provide the approximating method of PM10 classification efficiency curve below in conjunction with data point, and the precision of matched curve is verified.Choosing operating mode is: operating voltage
Figure 645888DEST_PATH_IMAGE095
, the smoke inlet flow velocity
Figure 904831DEST_PATH_IMAGE096
, the dust size scope
Figure 393581DEST_PATH_IMAGE097
, and meet the Rosin-Rammler distribution.
If classification efficiency
Figure 707757DEST_PATH_IMAGE031
With grain diameter
Figure 231142DEST_PATH_IMAGE032
The curve that changes satisfies Weibull distribution:
Figure 395407DEST_PATH_IMAGE098
(7)
In the formula:
Figure 699349DEST_PATH_IMAGE031
Be that electrostatic precipitator is to different-grain diameter
Figure 240052DEST_PATH_IMAGE032
The grade dust-collection efficiency of particle,
Figure 617944DEST_PATH_IMAGE034
,
Figure 31739DEST_PATH_IMAGE099
Be respectively the minimum of a value and the corresponding classification efficiency of grain diameter;
Figure 495081DEST_PATH_IMAGE100
,
Figure 839475DEST_PATH_IMAGE037
Form parameter and scale parameter for Weibull distribution.
Change for formula (7), its abbreviation is linear:
Figure 337452DEST_PATH_IMAGE101
(8)
In the formula:
Figure 905837DEST_PATH_IMAGE102
Carry out least square fitting again, calculate
Figure 122055DEST_PATH_IMAGE103
With
Figure 4560DEST_PATH_IMAGE104
Value, and obtain the form parameter of Weibull distribution
Figure 668628DEST_PATH_IMAGE105
And scale parameter
Figure 345597DEST_PATH_IMAGE037
, just can determine the speed displacement curve.
At the data point among Fig. 3,, obtain classification efficiency in conjunction with said method
Figure 783532DEST_PATH_IMAGE106
With grain diameter
Figure 532045DEST_PATH_IMAGE040
The curve fitting formula that changes is
(9)
Try to achieve classification efficiency according to formula (9)
Figure 852485DEST_PATH_IMAGE108
With grain diameter
Figure 590765DEST_PATH_IMAGE042
The curve that changes, as shown in Figure 3.
With
Figure 815073DEST_PATH_IMAGE109
Be example, substitution grain size grading efficiency curve fitting formula (9) obtains the classification efficiency of particle
Figure 142149DEST_PATH_IMAGE110
(soft dot among Fig. 3), this paper by the gradation efficient that numerical computations obtains is
Figure 488817DEST_PATH_IMAGE111
, be benchmark with the result of calculation of fitting formula, the error of calculation
Figure 635764DEST_PATH_IMAGE112
For:
Figure 663763DEST_PATH_IMAGE113
(10)
As seen the definite method by this paper electrostatic precipitator classification efficiency numerical computations and Weibull distribution fitting formula thereof is practical, the PM10 classification efficiency
Figure 156930DEST_PATH_IMAGE114
With grain diameter
Figure 612182DEST_PATH_IMAGE115
The fitting formula that changes has high accuracy.

Claims (1)

1. definite method of an electrostatic precipitator pellet PM10 arresting efficiency is characterized in that method comprises following concrete steps:
1) set up model: the electric field of the board-like electrostatic precipitator passage of line by two groups of parallel dust collecting pole plates and be positioned at its Centromedian one row equally spaced corona wire form, choose the passage dust collecting pole plate as simulated object;
2) with dust collecting pole plate along being divided into section on the airflow direction, wherein
Figure 852520DEST_PATH_IMAGE002
By the decision of the granule number under the particle diameter that is captured on the dust collecting pole plate, definition
Figure 831977DEST_PATH_IMAGE004
Be
Figure 611715DEST_PATH_IMAGE006
The length of dust collecting pole plate section:
Figure 6924DEST_PATH_IMAGE008
In the formula,
Figure 634345DEST_PATH_IMAGE010
Be along on the airflow direction, begin counting from the inlet of electrostatic precipitator electric field, the
Figure 456808DEST_PATH_IMAGE012
The abscissa value of certain the particle diameter particle landing point on dust collecting pole plate that is captured, in addition, when
Figure 723841DEST_PATH_IMAGE014
The time,
Figure 985058DEST_PATH_IMAGE016
When
Figure 653937DEST_PATH_IMAGE018
The time,
3) electric field is about corona wire place central shaft symmetry, choose symmetry axis upside half-plane as the zoning, use GAMBIT software that the zoning is comprised that grid is divided in interior dispersing, be divided into structured grid, the further refinement of grid is carried out near the high zone of the voltage gradient corona wire;
4)
Figure 214680DEST_PATH_IMAGE022
The particle diameter dust is
Figure 951691DEST_PATH_IMAGE006
Efficiency of dust collection in the dedusting section
Figure 2011102369642100001DEST_PATH_IMAGE024
Can be expressed as:
Figure 2011102369642100001DEST_PATH_IMAGE026
In the formula, Be
Figure 537394DEST_PATH_IMAGE022
The migration velocity of particle diameter dust;
Figure 2011102369642100001DEST_PATH_IMAGE030
Be
Figure 780287DEST_PATH_IMAGE006
The dedusting area of dedusting section correspondence,
Figure 2011102369642100001DEST_PATH_IMAGE032
Figure 2011102369642100001DEST_PATH_IMAGE034
Be flue gas flow,
Figure DEST_PATH_IMAGE036
Figure DEST_PATH_IMAGE038
Be the distance between corona wire and dust collecting pole plate; Height for the electrostatic precipitator electric field; Be the porch flue gas flow rate, will
Figure 897279DEST_PATH_IMAGE032
With
Figure 172402DEST_PATH_IMAGE036
The substitution following formula, can simplify
Figure DEST_PATH_IMAGE043
Formula:
Figure DEST_PATH_IMAGE045
The
Figure 878190DEST_PATH_IMAGE022
The particle diameter dust is along the efficiency of dust collection on the whole dust collecting pole plate length, i.e. grade dust-collection efficiency
Figure DEST_PATH_IMAGE047
, can be expressed as:
Figure DEST_PATH_IMAGE049
, in the formula,
Figure DEST_PATH_IMAGE051
Be
Figure DEST_PATH_IMAGE052
In the area of space of dedusting section correspondence, the
Figure 82863DEST_PATH_IMAGE022
The granule density of particle diameter dust, when
Figure DEST_PATH_IMAGE054
The time,
Figure DEST_PATH_IMAGE056
, represent of electrostatic precipitator porch
Figure 624834DEST_PATH_IMAGE022
Particle diameter dust granules concentration;
5) establish classification efficiency
Figure DEST_PATH_IMAGE058
With grain diameter
Figure DEST_PATH_IMAGE060
The curve that changes satisfies Weibull distribution:
Figure DEST_PATH_IMAGE062
In the formula:
Figure 765966DEST_PATH_IMAGE058
Be that electrostatic precipitator is to different-grain diameter
Figure 263943DEST_PATH_IMAGE060
The grade dust-collection efficiency of particle,
Figure DEST_PATH_IMAGE064
,
Figure DEST_PATH_IMAGE066
Be respectively the minimum of a value and the corresponding classification efficiency of grain diameter;
Figure DEST_PATH_IMAGE068
,
Figure DEST_PATH_IMAGE070
Form parameter and scale parameter for Weibull distribution;
6) formula in the step 5) is carried out letter and carry out least square fitting again after linear, obtain the form parameter of Weibull distribution
Figure DEST_PATH_IMAGE071
And scale parameter
Figure 910956DEST_PATH_IMAGE070
, just can determine the speed displacement curve;
7) according to the speed displacement curve of determining, obtain classification efficiency
Figure DEST_PATH_IMAGE072
With grain diameter
Figure 674644DEST_PATH_IMAGE073
The curve fitting formula that changes is:
Figure DEST_PATH_IMAGE075
, try to achieve classification efficiency With grain diameter
Figure 971950DEST_PATH_IMAGE073
The curve that changes.
CN201110236964.2A 2011-08-18 2011-08-18 Method for determining trapping efficiency of electrostatic dust collector on inhalable particulate matters (PM10) Expired - Fee Related CN102284360B (en)

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CN105817320A (en) * 2015-05-19 2016-08-03 南通诺亚居环保科技有限公司 Multi-row static high-efficient air-filtration system and application thereof
CN106951603A (en) * 2017-02-28 2017-07-14 上海电力学院 PM2.5 arresting efficiency contribution rate curve-fitting methods based on POWER functions
CN107644132A (en) * 2017-09-18 2018-01-30 大唐环境产业集团股份有限公司 A kind of computational methods for being used to simulate energized dust collector efficiency of dust collection
CN109282337A (en) * 2018-12-10 2019-01-29 杭州老板电器股份有限公司 Kitchen ventilator and its control method

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