CN108554634A - Introduce the line tubular electrostatic precipitator performance improvement method in magnetic field - Google Patents
Introduce the line tubular electrostatic precipitator performance improvement method in magnetic field Download PDFInfo
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- CN108554634A CN108554634A CN201810254543.4A CN201810254543A CN108554634A CN 108554634 A CN108554634 A CN 108554634A CN 201810254543 A CN201810254543 A CN 201810254543A CN 108554634 A CN108554634 A CN 108554634A
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- electrostatic precipitator
- efficiency
- magnetic field
- dust collection
- tubular electrostatic
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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
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
- B03C3/14—Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
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Abstract
The present invention relates to a kind of line tubular electrostatic precipitator performance improvement methods introducing magnetic field, this method will be inside the lead-in tubular electrostatic precipitator of magnetic field, the residence time extended in the online tubular electrostatic precipitator of fine particle by Lorentz force improves its efficiency of dust collection when low-voltage operating mode is run, and simulates to have obtained efficiency of dust collection of the offline tubular electrostatic precipitator of magnetic field environment under different operating voltage using FLUENT softwares.Compared with prior art, the present invention has many advantages, such as not reduce efficiency of dust collection by the way that steady magnetic field is introduced deduster particle movement place realization, only reduces the target of operation power consumption.
Description
Technical field
The present invention relates to a kind of performance of precipitator method for improving, are removed more particularly, to a kind of line pipe-type electrostatic introducing magnetic field
Dirt device performance improvement method.
Background technology
Line tubular electrostatic precipitator is most commonly seen one of the cleaner in thermal power plant.Country is to thermal power generation at present
The discharge standard of factory's dust pollution object is higher and higher.For economic considerations, thermal power plant will consider energy saving and subtract simultaneously
It is required of both row.Under normal circumstances, the promotion of line tubular electrostatic precipitator efficiency of dust collection needs carrying by operating voltage
Height is realized.However high working voltage will certainly bring larger energy consumption so that energy saving the two require index cannot with emission reduction
It takes into account simultaneously.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of lines introducing magnetic field
Tubular electrostatic precipitator performance improvement method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of line tubular electrostatic precipitator performance improvement method introducing magnetic field, this method is by magnetic field lead-in pipe-type electrostatic
Inside deduster, it is improved low by the residence time in the Lorentz force extension online tubular electrostatic precipitator of fine particle
Efficiency of dust collection when voltage operating mode is run, and simulate to have obtained the offline tubular electrostatic precipitator of magnetic field environment using FLUENT softwares
Efficiency of dust collection under different operating voltage.
Preferably, this approach includes the following steps：
1) the line tubular electrostatic precipitator simplified model for introducing magnetic field is established
2) magnetic confinement mechanism is utilized to change particle motion state；
3) the magnetic fields analysis under different operating voltage；
4) the line tubular electrostatic precipitator dust removal performance analysis of magnetic fields is introduced.
Preferably, the step 1) stated is specially：
Apply on the left of two-dimensional line tubular electrostatic precipitator section central axis vertical with direction of an electric field and is directed toward in paper
Magnetic induction intensity, right side applies the magnetic induction intensity outside and direction paper vertical with direction of an electric field, the entire dedusting of magnetic field covering
Device particle moves place, and does not change over time and be uniformly distributed in space, magnetic induction intensity ranging from 0~1.0T.
Preferably, the step 2) is specially：
After introducing steady magnetic field, electrification dust is made spiral under magnetic field environment by electric field force and Lorentz force synergy
Movement, extends residence time of the electrically charged particle in electrostatic precipitator, changes the collision course of electrically charged particle and dust collector pole.
Preferably, under magnetic fields when electrostatic precipitator is run with low-voltage operating mode, although the degree of air ionization
It is weaker, but since particle has the stop of long period in deduster, increase the number with free-electron collision, then increase
Charging particle amount, improves the electric field force suffered by particle, promotes the trend that particle is moved to dust collecting pole plate, and then improve
The efficiency of dust collection of line tubular electrostatic precipitator.
Preferably, the step 3) is specially：
Magnetic fields are loaded into particle aerodynamic field in FLUENT softwares, different magnetic induction intensity have been obtained by simulation
With the efficiency of dust collection curve of the offline tubular electrostatic precipitator of operating voltage.
Preferably, pass through the efficiency of dust collection curve, it is known that：
1) under same operating voltage, with the increase of magnetic induction intensity, PM2.5 combined dust-eliminating efficiency is in rising trend, preceding
Phase ascensional range is apparent, and later stage ascensional range slows down and tends towards stability, and illustrates the introducing in magnetic field to line tubular electrostatic precipitator
The promotion effect that efficiency of dust collection has had, and castering action becomes apparent when magnetic induction intensity is smaller；
2) under same magnetic induction intensity, with the increase of operating voltage, the overall efficiency of PM2.5 constantly increases, and amplification
But constantly reduce, illustrate that the raising of operating voltage promotes trapping of the line tubular electrostatic precipitator to PM2.5, but operating voltage is got over
It is bigger to improve power consumption caused by identical efficiency of dust collection for height；
3) with the increase of magnetic induction intensity, the difference of adjacent two curves constantly reduces, illustrates with magnetic induction intensity
Increase, the contribution that magnetic field traps PM2.5 is smaller and smaller.
Preferably, the step 4) is specially：
Magnetic field is introduced in online tubular electrostatic precipitator can extend the residence time in fine particle space inside it, make
It is more abundant to obtain deduster charging particle when low-voltage operating mode is run, and then the efficiency of dust collection of line tubular electrostatic precipitator is maintained
In higher level；It introduces magnetic field and raising operating voltage is suitable to each facilitation of particles efficiency of dust collection, i.e., magnetic field is made
With being compensated for well since operating voltage reduces the loss brought to efficiency of dust collection.
Compared with prior art, the present invention is removed by realizing not reduce steady magnetic field introducing deduster particle movement place
Dirt efficiency, only reduces the target of operation power consumption, and correlated results can be that line tubular electrostatic precipitator structure of modification and performance optimization carry
For reference and foundation
Description of the drawings
Fig. 1 is the line tubular electrostatic precipitator simplified model schematic diagram for introducing magnetic field；
Fig. 2 is PM2.5 combined dust-eliminatings efficiency under different operating voltage with the change curve of magnetic induction intensity；
Fig. 3 is PM2.5 classification efficiency contrast schematic diagrams under different operation parameter.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is a part of the embodiment of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other reality that those of ordinary skill in the art are obtained without making creative work
Example is applied, the scope of protection of the invention should be all belonged to.
In order to reduce generated energy consumption when line tubular electrostatic precipitator reaches higher efficiency of dust collection, magnetic field is introduced herein
Inside deduster, it is improved low by the residence time in the Lorentz force extension online tubular electrostatic precipitator of fine particle
Efficiency of dust collection when voltage operating mode is run.It simulates to have obtained the offline tubular electrostatic precipitator of magnetic field environment using FLUENT softwares and exist
Efficiency of dust collection under different operating voltage, known to after comparative analysis：(1) it is suitably introduced into online tubular electrostatic precipitator certain big
Small magnetic induction intensity can make deduster reach the target of low operation energy consumption, high efficiency of dust collection；(2) under same operating voltage, magnetic
Field improves the facilitation of efficiency of dust collection with the increase of magnetic induction intensity, but increase rate decreases, and shows magnetic strength
Answer the ability of intensity more hour magnetic field increase line tubular electrostatic precipitator dust removal performance stronger；(3) certain magnetic induction intensity is introduced
The promotion that line tubular electrostatic precipitator PM2.5 combined dust-eliminatings efficiency and grade dust-collection efficiency are generated with one fixed working voltage of raising
Effect is substantially suitable.
1, electromagnetism dust removal mechanism
As shown in Figure 1, on the left of two-dimensional line tubular electrostatic precipitator section central axis apply it is vertical with direction of an electric field and
The magnetic induction intensity being directed toward in paper, right side apply magnetic induction intensity that is vertical with direction of an electric field and being directed toward outside paper.It covers in magnetic field
Entire deduster particle movement place is covered, and does not change over time and is uniformly distributed in space, magnetic induction intensity ranging from 0~
1.0T。
If applying negative high voltage on polar curve, the free ion in air moves under the action of electric field to the two poles of the earth.With electricity
Pressure increases, and ionization takes place in electric field strength enhancing, air.After electronics experienced avalanche process, the freely electricity of interpolar movement
Subnumber greatly increases, free electron to gather dust polar motion during collide and adhere to grit and make its bear electric thereon, lotus
Charged particle is under electric field force effect towards extreme direction campaign of gathering dust.Voltage is higher, and electric field strength is bigger, and the range of air ionization is got over
Greatly, interpolar free electron number is more, and charging particle is also more abundant.
After introducing steady magnetic field, electrification dust is made comparisons under magnetic field environment by electric field force and Lorentz force synergy
Complicated screw, extends residence time of the electrically charged particle in electrostatic precipitator, changes electrically charged particle and dust collector pole
Collision course.Under magnetic fields when electrostatic precipitator is run with low-voltage operating mode, although the degree of air ionization is weaker,
But since particle has the stop of long period in deduster, the number with free-electron collision is increased, is then increased
Grain carrying capacity, improves the electric field force suffered by particle, promotes the trend that particle is moved to dust collecting pole plate, and then improve spool
The efficiency of dust collection of formula electrostatic precipitator.
2, the magnetic fields analysis under different operating voltage
Magnetic fields are loaded into particle aerodynamic field in FLUENT softwares, different magnetic induction intensity have been obtained by simulation
With the efficiency of dust collection of the offline tubular electrostatic precipitator of operating voltage, as shown in Figure 2.As seen from the figure：
1) under same operating voltage, with the increase of magnetic induction intensity, PM2.5 combined dust-eliminating efficiency is in rising trend, preceding
Phase ascensional range is apparent, and later stage ascensional range slows down and tends towards stability, and illustrates the introducing in magnetic field to line tubular electrostatic precipitator
The promotion effect that efficiency of dust collection has had, and castering action becomes apparent when magnetic induction intensity is smaller；
2) under same magnetic induction intensity, with the increase of operating voltage, the overall efficiency of PM2.5 constantly increases, and amplification
But constantly reduce, illustrate that the raising of operating voltage promotes trapping of the line tubular electrostatic precipitator to PM2.5, but operating voltage is got over
It is bigger to improve power consumption caused by identical efficiency of dust collection for height；
3) with the increase of magnetic induction intensity, the difference of adjacent two curves constantly reduces, illustrates with magnetic induction intensity
Increase, the contribution that magnetic field traps PM2.5 is smaller and smaller.
In fig. 2, the efficiency of dust collection of magnetic induction intensity is not introduced as reference when using operating voltage being respectively 40kV and 50kV
Standard obtains the induction level that need to be introduced when operating voltage reduces 10kV respectively under identical efficiency of dust collection, specifically removes
Dirt efficiency and corresponding operating parameter are shown in Table 1.It is not difficult to obtain by table 1：It is strong that 0.378T magnetic induction is introduced under 30kV operating voltages
The efficiency of dust collection of degree is equivalent to the efficiency of dust collection that operating voltage is improved to 10kV, and 0.425T magnetic strengths are introduced under 40kV operating voltages
Efficiency of dust collection when to answer the efficiency of dust collection of intensity with operating voltage be 50kV is suitable, illustrates the magnetic induction for being suitably introduced into a certain size
Intensity can reduce the working voltage of line tubular electrostatic precipitator under conditions of not changing efficiency of dust collection, realize energy-saving
Purpose.
Table 1
Fig. 3 gives pair in magnetic field and the offline tubular electrostatic precipitator grade dust-collection efficiency of two kinds of operating parameters of operating voltage
Compare curve.It can be seen that：When operating voltage is 30kV, magnetic induction intensity is 0.375T, the grade dust-collection efficiency of PM2.5 is substantially
It is equivalent to efficiency of dust collection when operating voltage is 40kV；Introduced magnetic induction intensity 0.375T is obtained with by combined dust-eliminating efficiency
To 0.378T errors be only 0.8%, further demonstrate conclusion above, at the same illustrate introduce magnetic field and promoted operating voltage
Both modes are almost the same to the castering action of line tubular electrostatic precipitator single particles efficiency of dust collection.
3, the line tubular electrostatic precipitator dust removal performance of magnetic fields is introduced
In order to reduce the operation power consumption of line tubular electrostatic precipitator, magnetic fields are introduced inside deduster, mechanism is passed through
Analysis and numerical simulation are obtained as drawn a conclusion：Fine particle can be extended in it by introducing magnetic field in online tubular electrostatic precipitator
The residence time in portion space so that deduster charging particle when low-voltage operating mode is run is more abundant, and then by line pipe-type electrostatic
The efficiency of dust collection of deduster maintains higher level；It introduces magnetic field and improves rush of the operating voltage to each particles efficiency of dust collection
Suitable into effect, i.e., magnetic fields are compensated for well since operating voltage reduces the loss brought to efficiency of dust collection.Correlation is set
Meter can be that the performance boost of line tubular electrostatic precipitator opens up new mentality of designing and direction with energy-saving.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain subject to.
Claims (8)
1. a kind of line tubular electrostatic precipitator performance improvement method introducing magnetic field, which is characterized in that this method introduces magnetic field
Inside line tubular electrostatic precipitator, by Lorentz force extend the online tubular electrostatic precipitator of fine particle in residence time come
Its efficiency of dust collection when low-voltage operating mode is run is improved, and simulates to have obtained the offline tubular type of magnetic field environment using FLUENT softwares
Efficiency of dust collection of the electrostatic precipitator under different operating voltage.
2. according to the method described in claim 1, it is characterized in that, this approach includes the following steps：
1) the line tubular electrostatic precipitator simplified model for introducing magnetic field is established
2) magnetic confinement mechanism is utilized to change particle motion state；
3) the magnetic fields analysis under different operating voltage；
4) the line tubular electrostatic precipitator dust removal performance analysis of magnetic fields is introduced.
3. according to the method described in claim 2, it is characterized in that, the step 1) is specially：
Apply magnetic that is vertical with direction of an electric field and being directed toward in paper on the left of two-dimensional line tubular electrostatic precipitator section central axis
Induction, right side apply magnetic induction intensity that is vertical with direction of an electric field and being directed toward outside paper, and magnetic field covers entire deduster
Grain movement place, and do not change over time and be uniformly distributed in space, magnetic induction intensity ranging from 0~1.0T.
4. according to the method described in claim 2, it is characterized in that, the step 2) is specially：
After introducing steady magnetic field, electrification dust is made spiral fortune under magnetic field environment by electric field force and Lorentz force synergy
It is dynamic, residence time of the electrically charged particle in electrostatic precipitator is extended, the collision course of electrically charged particle and dust collector pole is changed.
5. according to the method described in claim 4, it is characterized in that, when electrostatic precipitator is with low-voltage operating mode under magnetic fields
When operation, although the degree of air ionization is weaker, since particle has the stop of long period in deduster, increase and oneself
By the number of electron collision, charging particle amount is then increased, improves the electric field force suffered by particle, promotes particle to gathering dust
The trend of pole plate movement, and then improve the efficiency of dust collection of line tubular electrostatic precipitator.
6. according to the method described in claim 2, it is characterized in that, the step 3) is specially：
Magnetic fields are loaded into particle aerodynamic field in FLUENT softwares, different magnetic induction intensity and work have been obtained by simulation
Make the efficiency of dust collection curve of the offline tubular electrostatic precipitator of voltage.
7. according to the method described in claim 6, it is characterized in that, passing through the efficiency of dust collection curve, it is known that：
1) under same operating voltage, with the increase of magnetic induction intensity, PM2.5 combined dust-eliminating efficiency is in rising trend, on early period
Increasing degree degree is apparent, and later stage ascensional range slows down and tends towards stability, and illustrates the introducing in magnetic field to line tubular electrostatic precipitator dedusting
The promotion effect that efficiency has had, and castering action becomes apparent when magnetic induction intensity is smaller；
2) under same magnetic induction intensity, with the increase of operating voltage, the overall efficiency of PM2.5 constantly increases, and amplification is not
It is disconnected to reduce, illustrate that the raising of operating voltage promotes trapping of the line tubular electrostatic precipitator to PM2.5, but operating voltage is higher,
It is bigger to improve power consumption caused by identical efficiency of dust collection；
3) as the increase of magnetic induction intensity, the difference of adjacent two curves constantly reduce, illustrate the increasing with magnetic induction intensity
Greatly, the contribution that magnetic field traps PM2.5 is smaller and smaller.
8. according to the method described in claim 2, it is characterized in that, the step 4) is specially：
Magnetic field is introduced in online tubular electrostatic precipitator can extend the residence time in fine particle space inside it so that remove
Dirt device charging particle when low-voltage operating mode is run is more abundant, so by the efficiency of dust collection of line tubular electrostatic precipitator maintain compared with
High level；It introduces magnetic field and raising operating voltage is suitable to each facilitation of particles efficiency of dust collection, i.e., magnetic fields are very
It compensates for well since operating voltage reduces the loss brought to efficiency of dust collection.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038723A (en) * | 2019-04-28 | 2019-07-23 | 张建平 | A kind of interior whirlpool type electrostatic cyclone efficiency of dust collection method for improving |
| CN111672627A (en) * | 2020-04-29 | 2020-09-18 | 河南城建学院 | Electromagnetism stack dust removal dehumidification pipe and honeycomb tubular electromagnetism stack dust removal dehumidification device |
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| CN203635328U (en) * | 2013-11-29 | 2014-06-11 | 山东大学 | Multi-field/force synergistic effect fine particle removing device |
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| CN110038723A (en) * | 2019-04-28 | 2019-07-23 | 张建平 | A kind of interior whirlpool type electrostatic cyclone efficiency of dust collection method for improving |
| CN111672627A (en) * | 2020-04-29 | 2020-09-18 | 河南城建学院 | Electromagnetism stack dust removal dehumidification pipe and honeycomb tubular electromagnetism stack dust removal dehumidification device |
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