CN101213025A - Static air cleaning device - Google Patents
Static air cleaning device Download PDFInfo
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- CN101213025A CN101213025A CN200580050293.3A CN200580050293A CN101213025A CN 101213025 A CN101213025 A CN 101213025A CN 200580050293 A CN200580050293 A CN 200580050293A CN 101213025 A CN101213025 A CN 101213025A
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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
- B03C3/08—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
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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
- B03C3/361—Controlling flow of gases or vapour by static mechanical means, e.g. deflector
- B03C3/366—Controlling flow of gases or vapour by static mechanical means, e.g. deflector located in the filter, e.g. special shape of the electrodes
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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
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
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Abstract
An electrostatic air cleaning device includes an array (201) of electrodes. The electrodes include corona electrodes (102) connected to a suitable source (100) of high voltage so as to generate a corona discharge. Laterally displaced collecting electrodes (203) include one or more bulges (207) that have aerodynamic frontal upwind surfaces and airflow disrupting tailing edges downwind that create quite zones (209) for the collection of particulates removed from the air. The bulges (207) may be formed as rounded leading edges on the collecting electrodes (203) and/or ramped surfaces (415) located, for example, along a midsection of the electrodes. Repelling electrodes (104) positioned between pairs of the collecting electrodes (203) may include similar bulges (517) such as cylindrical or semi-cylindrical leading and/or trailing edges (517).
Description
Related application
Present patent application relates to following patent and patent application:
Submitted on October 14th, 1999 the 09/419th, No. 720, name is called the U.S. Patent application of electrostatic fluid accelerator, now is patent US6, and 504,308; Submitted on July 3rd, 2002 the 10/187th, No. 983, name is called the U.S. Patent application of spark control method and device; The 10/175th of submission on June 21st, 2002, No. 947, name is called static that fluid flows and adds the U.S. Patent application of speed control method and device and the sequence number of submitting on December 15th, 2003 and (act on behalf of file number: the application's that title 432.004CIP/1010579) the is identical application that continues; Submitted on July 3rd, 2002 the 10/188th, No. 069, name is called fluid the flow electrostatic fluid accelerator of control and the U.S. Patent application of control method; Submitted on January 28th, 2003 the 10/352nd, No. 193, name is called the U.S. Patent application of the static flow accelerator that the control fluid flows; Submitted on November 18th, 2002 the 10/195th, No. 869, name is called the U.S. Patent application of electrostatic fluid accelerator; The xxx that on December 2nd, 2003 submitted to, xxx number (act on behalf of file number: 432.008/10101579), name is called the U.S. Patent application of corona discharge electrode and method of operating; More than, each file do as a whole quote in this article for referencial use.
Technical field
The present invention relates to static air cleaning device.This device is based on the acceleration of corona discharge and ion, and dust particles, and is collected by opposite charged electrode.
Bei Jing Ji Intraoperative
Many patents (are seen United States Patent (USP) 4,689,056 and 5,055,118) static air cleaning device has all been described, it comprise that (i) produces ion with the method for corona discharge and air quickens and (ii) with such as the charged of the air suspended particulates of dust and collect the device that combines.These corona discharge assemblies use a high voltage potential between corona (discharge) electrode and collection (or acceleration) electrode, producing a highdensity electric field, and near corona electrode generation one corona discharge.Ion and ambient air molecule that corona produces bump, and the momentum of ion is passed to air to generate corresponding air movement, so that reach a mass motion on the direction that air requires to flow.
U.S. Pat 4,689,056 has described an ion wind type air cleaner, and it comprises the corona electrode that is made of the dust collecting device with colelctor electrode, and one is arranged on the dirty repulsion electrode of described corona electrode alternatively.Power supply between corona electrode and colelctor electrode can provide a high pressure (as 10-25KV), can produce an ion wind in the direction from the corona electrode to the colelctor electrode.When airborne particulate passes corona discharge, corresponding to an accumulation of the polarity of corona electrode on described these particles, so that they are attracted and accumulate on the colelctor electrode of oppositely charged.After passing colelctor electrode downstream array, the charged and collection of these particles makes particulate effectively, as dust, separates with fluid such as air.Specifically, apply a high negative or positive current potential to corona electrode, colelctor electrode then maintains the earth potential positive potential or the negative potential of corona electrode (promptly with respect to), repels the relative colelctor electrode of electrode and keeps different current potentials, for example intermediate potential.U.S. Pat 5,055,118 have described one similarly installs.
These similar devices can impel the collection of flowing of air and dust simultaneously.Yet the dust collection efficiency of such electric air cleaner (i.e. " clean rate ") is relatively low, can only take away the dust of 25-90% from air.And the clean rate that the science and technology in the present age often requires can be higher, and specifically, diameter is that the clean rate of the grit of 0.3 μ m and larger diameter will be near 99.97%.Therefore, the air cleaner of prior art can not with the clean rate competition of the filter of the filtering type of HEPA (high-effect ionic air), according to DOE-STD-3020-97, it must satisfy such cleaning efficiency.
Therefore, need a kind of electrostatic fluid deduster, particularly at the aircleaning facility that can remove airborne particulate effectively.
Summary of the invention
Causing an inefficient relatively reason of electrostatic equipment is not consider the motion of charged corpuscle and they charged track or passage in corona discharging area.Therefore, grit can be accepted some electric charges near corona electrode the time.Now charged particle is shifted colelctor electrode onto and is repelled electrode or at colelctor electrode with repel between the electrode from corona electrode.Potential difference between these battery lead plates has formed a highfield, so that charged particle is shifted onto colelctor electrode.Charged grit just stops and remains on the collector plate.
Under the effect of power, charged particle is subjected to the attraction of colelctor electrode, described power and collector plate and the electric-field intensity of repelling between the battery lead plate are directly proportional, promptly=qE. is represented as this equation, the size of attraction is directly proportional with electric-field intensity, thereby just be directly proportional with collector plate and the potential difference repelled between the battery lead plate, and the distance between two electrode plate is inversely proportional to.Yet maximum electric field potential difference is subjected to the restriction of air dielectric intensity, and promptly the breakdown voltage of fluid can be thereon with flashing.If potential difference surpasses some limiting values, dielectric will be breakdown, causes electric field not exist, or interrupt the cleaning course/operation of air.Wherein, the zone that dielectric breakdown most possibly takes place is near the battery lead plate edge, and because of this regional electric-force gradient maximum, the electric field energy of generation reaches maximum.
Factor that another restriction particulate is removed (as air cleaner) efficient is because colelctor electrode and repel the existence of the lamina air flow between the electrode, such flow restriction the motion of charged particle to collector plate.
Another causes the not high factor of cleaning efficiency to be the trend that particulate rests at first to be had leaving or disperse behind the colelctor electrode.In case particle will lose electric charge after touching colelctor electrode, the electrostatic attraction that particle is sticked on the electrode will not exist.Adhere to if lack this static, when air-flow passed or pass through electrod-array, air-flow on every side can disperse (or in fluid of other conveying) in the air to particle.
Embodiments of the invention are at several defectives of prior art, and for example: capacity gauge is low, and electric-field intensity is low, and the track and the particle of charged particle adhere again on the colelctor electrode.According to an embodiment, colelctor electrode and repulsion electrode have a typical case and whole shape, and this shape makes air additional movement to be produced on a direction towards colelctor electrode.Turning to of this air-flow is by vertical section not being inserted for general flat flat shape or adding ledge or projection realizes.
Please note, term as used herein " ledge ", " projection ", " protuberance ", " protrusion ", " projection ", use unless otherwise prescribed or in context obviously, it has all comprised for by the normal that first type surface limited of a structure or the extension outside the normal plane.Therefore, in this case, these terms include but not limited to these structures: the tabular structure that (i) forms the connection of the thickness substantially that comprises rising part, this rising part is not with the domination surface co-planar of plate or do not stretch out the domination plane, the domination plane that is limited as first type surface (for example one " skeleton " structure) and the (ii) compound or combining structure of different-thickness by plate, it comprises that (a) is one or more from domination plane outwardly directed " thick " part by the uniform substantially tabular planar section of thickness (b) that the domination plane limits, (comprise with and/or in the integrally formed structure of lower floor, as the part that extends laterally of planar section).
According to an embodiment, projection or protuberance leave the width of electrode, and the whole airflow direction with device becomes laterally (promptly vertical) substantially.Projection is outwards outstanding along a short transverse of electrode.Projection can comprise the board-like material that has formed protuberance or projection and/or electrode thickening.According to one embodiment of the invention, one leading edge of projection has a cross section circle, that increase or tilt gradually, the minimum interference of (as keeping and/or promoting a laminar flow) and/or avoid so that air-flow, and a rear portion of projection or edge disconnect air-flow, promote air-flow to separate, and cause and/or produce a turbulent flow or whirlpool with electrode body.Projection also can form a slowed down air velocity and/or changed the dirty zone of airflow direction, with the ability that improves from the colelctor electrode dedusting and remove other particulate, and keeps always.Projection preferably is positioned at the end or the edge of electrode, to stop the rapid increase of electric field.Projection can also be along partly being provided with leading edge electrode centers at interval.
On the whole, projection has a geometry, and it forms " trap " for particle.These traps are right after the zone that just can form a relative low velocity at the planar section of colelctor electrode simultaneously to the resistance minimum of primary air after projection (being trailing edge or " down current ").
These embodiment of the present invention provide an improved plan to improve the efficient of air cleaner ability and electrostatic fluid (comprising air) purifier and system.The circular projection of electrode tip has reduced around these edges and near electric field, simultaneously, but keeps a potential difference and/or gradient with the operating value of a minimum between electrode, can't produce electric spark or electric arc.These projections also make air generation turbulence effectively.Opposite with aforesaid instruction, during a specific charged particle was in colelctor electrode and repels between the electrode, slight turbulence will prolong a period of time.This time period that prolongs has increased the possibility that particle is caught and collected by electrode on colelctor electrode.Especially, the time of prolongation need a charged particle through colelctor electrode (with repel electrode, if having) between the zone, particle is moved to the enough near possibility of colelctor electrode will be increased, so that particle can be caught by colelctor electrode.
" trap " of projection back the air movement speed of projection back (immediately " down current ") be reduced to equal substantially 0 and, in some cases, make the air-flow of trap area reverse.The feasible interference that can not be subjected to initial or main air-flow (being primary air) attached to those particles in the trap of air velocity that reduce and/or reverse in the projection back region.Minimizing of disturbing makes particle stay as much as possible in a period of time in the trap, up to using a suitable clean method to remove.
Description of drawings
Fig. 1 is the corona array that forms the part of static air cleaning in the prior art, the schematic cross-sectional view of repelling electrode and colelctor electrode;
Fig. 2 is the schematic cross-sectional view of electrod-array, and wherein, according to one embodiment of the invention, the columniform jut of colelctor electrode forms in leading edge;
Fig. 2 A is the stereogram of the electrode configuration of Fig. 2;
Fig. 2 B is the schematic cross-sectional view of an electrod-array, and wherein, according to another embodiment of the present invention, the horizontal tubular protrusion part of colelctor electrode forms in leading edge;
Fig. 2 C is the schematic cross-sectional view of another structure of colelctor electrode that the tubulose leading edge of part opening is arranged;
Fig. 3 is the schematic cross-sectional view of electrod-array, and wherein, according to an embodiment more of the present invention, the semi-cylindrical jut of colelctor electrode forms in leading edge;
Fig. 3 A is the enlarged drawing of the described colelctor electrode leading edge of Fig. 3;
Fig. 3 B is the schematic cross-sectional view of an electrod-array, and wherein, according to still another embodiment of the invention, a flat tubular portion of colelctor electrode forms in leading edge portion;
Fig. 3 C is the enlarged drawing of a leading edge of the colelctor electrode of Fig. 3 B;
Fig. 3 D is the enlarged drawing of another structure of a leading edge of colelctor electrode;
Fig. 4 is the schematic cross-sectional view of an electrod-array, and wherein, according to one embodiment of the invention, colelctor electrode had both had the half-cylindrical jut that forms in a leading edge, has the oblique part of wedge of a symmetry that forms along the core of an electrode again;
Fig. 4 A is the oblique enlarged drawing partly of wedge of the colelctor electrode of Fig. 4;
Fig. 4 B is the schematic cross-sectional view of an electrod-array, and wherein, colelctor electrode has an initial semi-cylindrical jut, and a hangover has the electrode plate portion of a constant thickness that forms in a plurality of oblique and planar sections;
Fig. 4 C is the stereo amplification figure of the colelctor electrode of Fig. 4 B;
Fig. 4 D is the schematic cross-sectional view that can be used for another skeleton shape colelctor electrode in the configuration of Fig. 4 B;
Fig. 5 is the schematic diagram of an electrod-array, and it comprises that according to an embodiment more of the present invention, electrode is repelled in the colelctor electrode of Fig. 4 and insertion, and this repulsion electrode has the cylindrical projections that forms on front and rear edge;
Fig. 5 A is the schematic diagram of an electrod-array, and it comprises according to another embodiment of the present invention, the colelctor electrode of Fig. 4 C, and insert and repel electrode, this repulsion electrode has cylindrical projections as shown in Figure 5;
Fig. 5 B is another sectional drawing that repels electrode structure;
Fig. 6 is the schematic diagram of the electrode array configurations of similar Fig. 5, wherein, forms a gap at each mid portion that repels electrode; And
Fig. 7 is the photo of a trapezoidal electrode structure, and this structure is along the leading edge configuration of colelctor electrode shown in Figure 2.
Ju Body Real executes mode
Fig. 1 is the schematic diagram according to the electrod-array of the part of a static air cleaning device of prior art.As shown in the figure, a static air cleaning device comprises that one is connected to the high voltage source 100 of electrode 101 arrays, by this power supply, under the electrostatic field that produces by electrode, propelling fluid, as air, promptly the corona discharge that is produced by corona electrode 102 quickens the colelctor electrode of air towards the opposite electricity of band.These electrodes are connected (as high voltage source 100) with adaptive high voltage source, and the voltage range between the electrode is between 10KV-25KV.
Electrod-array comprises three groups: (i) son of a laterally spaced line corona electrode 102 (illustrating 2) row, and its array vertically separates; The (ii) submatrix of a laterally spaced tabular colelctor electrode 103 (illustrating 3); The (iii) submatrix of a tabular repulsion electrode 104 (illustrating 2), its between them and lateral dispersion between colelctor electrode 103.One high voltage source (not shown) offers the potential difference between corona electrode 102 and the colelctor electrode 103, to produce corona discharge around corona electrode 102.So just make and cause that thus ambient air is to being moved by the whole or main desired direction shown in the arrow 105 by the ion that corona electrode 102 produces to colelctor electrode 103 accelerated motions.When the air that has each based fine particles (as dust, i.e. " dirty air ") enters array from the intake section (promptly from the left side shown in Figure 1, contact with corona electrode 102 as soon as possible) of device, the ion that corona electrode 102 is launched just charges to grit.Charged grit enters the passage between colelctor electrode 103 and the repulsion electrode 104 then.Repel electrode 104 and be connected to an adaptive power supply, can keep different current potentials so that make to repel between electrode and the colelctor electrode 103, for example, a medium voltage between corona electrode 102 and colelctor electrode 103 or a half voltage.Potential difference causes the related electric field of generation between these electrodes, makes charged grit quicken to leave and repels electrode 104, then towards colelctor electrode 103 motions.Yet, occur simultaneously towards the resultant motion of colelctor electrode 103 and in the outlet or the discharge portion motion of the whole or most air shown in the right side of Fig. 1 towards device.This main chance that has limited particle surface of elder generation's arrival colelctor electrode 103 before going out electrod-array 101 towards the synthetic total motion that exports.Therefore, the surface that only be that the particle of limited quantity can be approaching, contacts and rest on colelctor electrode 103, and in the air of process, remove by this.So this one type of prior art syringe can not surpass 70-80% work with cleaning efficiency, promptly the 20-30% in all dust can not remove by this device, and the device that flies out also enters in the atmosphere once more.
Shown in Figure 2 is one embodiment of the invention, and wherein, the mode that the geometry of improvement colelctor electrode is collected on colelctor electrode and stopped with the enhancing particulate makes air-flow change direction.As shown in the figure, a static air cleaning device comprises an electrode 201 arrays, and described array has comprised the identical electrode group of being explained with Fig. 1, and promptly the line corona electrode 102, colelctor electrode 203 and repulsion electrode 204.Colelctor electrode 203 is planar shaped substantially, promptly has one and is the plate electrode of planar section 206 substantially, but have columniform projection 207 in its leading edge, and promptly the colelctor electrode of the most close corona electrode 102 partly is a cylinder.The nominal diameter d of projection 207 is greater than the thickness t of planar section 206, and specifically, its at least 2 times or 3 times are to thickness t.For example, if the thickness t=1mm of planar section 206, d＞1mm, preferably d＞2mm, more preferably d＞3mm. so
Corona electrode 102, colelctor electrode 203 with repel electrode 204 and all be connected, high voltage source 100 (see figure 1)s for example with an adaptive high-voltage power supply.Connecting corona electrode 102 so that be maintained at potential difference with respect to colelctor electrode 203 and the repulsion electrode 104 that remains on a certain intermediate potential is 10-25KV.It should be noted that for the importance of operating means, interelectrode potential difference can be better than absolute potential.For example; any electrode group can need or like remaining on approaching or a certain grounded reference potential arbitrarily because of any reason; these reasons comprise; for example; the easy degree of power distribution, security; protection contacts and/or uses the Protector with other structure carelessness, makes the catastrophe risk relevant with special construction reduce to minimum or the like.Can also change the power supply type that is applied, so that a constant or DC component that comprises the relation between some pulsation or alternating current and/or voltage assembly and/or these assemblies and the power supply that applies is as a or many parts of patent applications of quoting before and/or prior art are described.The mechanism that can also comprise other, control and carry out other function with the operation of control device, for example, use a thermoelectricity to recover the material of electrode to corona electrode, as the related application of quoting described, this is by eliminate forming and/or be deposited on oxide above the electrode and/or pollutant to recover electrode material.
The configuration of Fig. 2 also is shown in the three-dimensional view shown in Fig. 2 A, obviously in order to simplify, has omitted colelctor electrode 203 and the transverse width (being the direction of vertical paper) that repels electrode 204.Just as shown in the figure, particulate 210 (as dust) is attracted, and stays the back or the down current of the cylindrical projections 207 of (see figure 2) in the common scope in dead zone 209.
Refer again to Fig. 2, the geometry of colelctor electrode 203 has improved the capacity gauge of dust and the elimination efficiency of dust.The small part that is increased to of efficient is that in this zone, charged particle is adsorbed on the surface (Fig. 2 A) of colelctor electrode 203 owing to after the air-flow in the zone 208 of cylindrical projections 207 back become turbulent flow, enter a dead zone 209 again.For example, has high relatively reynolds number Re when planar section 206
1(as Re
1〉=100, Re preferably
1〉=1000), at the reynolds number Re in turbulent region 208 and/or dead zone
2Just low relatively, (as Re
2＜100, Re preferably
2≤ 10, Re more preferably
2≤ 5).The second, the chance that the ion of absorption remains on the dead zone increases, and can not enter in the air once more.The 3rd, projection impels air to enter complicated orbital motion, thus projection be near and/or contact segment length's time with " collecting zone " of colelctor electrode 203 (as dead zone 209 and/or zone 208).Can improve the collection efficiency of device individually widely with these improvement of combination.
Fig. 2 B is depicted as another kind of structure, colelctor electrode 203A has the structure of a skeleton shape, it comprises a thickness adjacent plate of identical materials (as a suitable metal, metal alloy, layer structure or the like) substantially that has been shaped (as using the mold pressing bending), forms the tubular protrusion 207A of front end sealing or opening with preceding (i.e. " the ascending air ") edge along colelctor electrode 203A.Although the tubular protrusion 207A shown in Fig. 2 B becomes a ring along length substantially, it can form and include the part of opening in various degree.For example, shown in Fig. 2 C, columniform projection 207B can be only facing to 270 degree or littler so that cylindrical outer surface is towards primary air direction air movement, and open backward.
Adopt difform colelctor electrode also further to be improved, such as adopting the semi-cylindrical solid shown in Fig. 3 and Fig. 3 A.As described, colelctor electrode 303 has a semi-cylindrical projection 307 in the formation of electrode leading edge, and remaining down current comprises that partly one is plane or tabular part 306 substantially.Semi-cylindrical projection 307 comprises the flat down current edge 312 that the leading edge 311 and of a bending combines with planar section 306.The nominal diameter of crooked leading edge 311 is greater than the thickness of planar section 311, preferably 2 or 3 of its thickness times.Although illustrated down current edge 312 is perpendicular to planar section 306 and be flat wall substantially, but it can also adopt other structure or geometry, and preferably down current edge 312 is positioned at the circle ring area 313 that an extension cylinder that is overlapped by the leading edge 311 with the bending shown in Fig. 3 A is limited.Should there be a unexpected transformation at down current edge 312; with promote turbulent flow and/or protect certain part of half-cylindrical projection 307 (or other shape for lugs, as half elliptic) and/or the section of planar section 306 is not subjected to directly and at full speed the influence of primary air to form a collecting region or dead zone.The formation in collecting region and/or dead zone 309 has improved collection efficiency, and provides one to be of value to the environment that dust is being decided and kept.
Shown in Fig. 3 B, 3C and the 3D is the structure of the skeleton shape of colelctor electrode.Shown in Fig. 3 B and 3C, colelctor electrode 303A comprises a leading edge 307A, and except side, its reverse far-end at pipe forms a closed substantially semicircular tubular portion.Like this, down current wall 312A and 312B are complete basically.
Fig. 3 D is depicted as another kind of structure, and wherein, leading edge 307B makes an opening, promptly replaces a wall, the width of a hole of opening or seam 312D process electrode, and only present down current wall 312C.
Fig. 4 and 4A are depicted as another embodiment of the present invention, wherein, except projection 407 (be in this case half-cylindrical) be leading edge along colelctor electrode 403 form, the down current of colelctor electrode 403 leading edges has partly formed other " dust arrester " 414, to form other dead zone.The particulate elimination efficiency of colelctor electrode and the elimination efficiency of whole device have further been improved by the other dead zone 409 that dust arrester 414 forms.As shown in the figure, dust arrester 414 can be the wedge part of symmetry, and it has the apparent surface's of the colelctor electrode 403 that is arranged in a zone that is in other formation electrode plane part chamfered portion 415.Relative chamfered portion 415 outwards rises from a planar section of electrode, and chamfered portion 415 ends at wall 416 places.The gradient of chamfered portion 415 is approximately 1: 1 (promptly 45 degree), preferred rise be no more than 1: 2 (being the 25-30 degree) and, more preferably be no more than 1: 3 (promptly less than the 15-20 degree).Chamfered portion 415 can rise to the thickness of at least one electrode, can surpass planar section 406 on the height, and the preferably thickness of at least 2 electrodes, even higher height may more suitable (promptly rising at least 3 times of thickness to colelctor electrode).Therefore, if the thickness of planar section 406 is 1mm, so 414 of dust arresters can rise to 1,2,3mm or higher.
Illustrated dust arrester 414 is one to be positioned at the wedge of the symmetry with relative inclined-plane on colelctor electrode 403 arbitrary limits, also can only form an asymmetric structure with a chamfered portion on a surface.In addition, clear easy for illustrating, the dust arrester that only drawn, it can also incorporate another lip-deep a plurality of dust arresters that are included on each colelctor electrode into.And, although the shape of illustrated dust arrester is wedge, can also adopt other shape, for example be similar to the half-cylindrical solid of illustrated leading edge projection 407.
Dust arrester can also be made by the uniform plate of a thickness being made the shape that needs, rather than uses a kind of plane bottom plate with the different structure that forms to make thereon, and different structures cause the varied in thickness of electrode.For instance, shown in Fig. 4 B and 4C, colelctor electrode 403A can comprise that a leading edge at plate forms half cylindrical one initial half-cylindrical projection 407, and this plate is bent or the plate that is shaped on the contrary comprises planar section 406 and dust arrester 414A.It is noted that dust arrester 414A comprises other the identical metallic plate of neighbouring part of thickness and electrode, promptly planar section 406, and dust arrester can be formed by any other method, makes as punching press etc.
Fig. 4 D is depicted as the overall picture of the skeleton shape structure of a colelctor electrode 403B, and wherein, projection 407A makes a semicircular pipe, and its crooked outer surface is towards ascending air, and flat wall shape part is towards the direction of down current.
Shown in Fig. 5 and Fig. 5 A, improve the surface and the colelctor electrode 403 that repel electrode 504, just further improvement is arranged like this.With reference to figure 5, projection 517 (illustrate 2, lay respectively at the leading edge and the trailing edge that repel electrode 504) forms other air turbulence around repelling electrode.Although only drawn 2 projections 517 among the figure, can also use other quantity and configuration.In this embodiment, projection 517 is positioned on arbitrary limit of dust arrester 414 of neighbor set electrode 403 (i.e. " ascending air " and " down current ").In the inside of electrod-array 501, repel electrode 504 and be parallel to each side of colelctor electrode 403 and be positioned at each side.
Projection 507 has two effects.Projection can form the electric-field intensity between each projection 414 that other air turbulence can strengthen colelctor electrode 403 again.The electric field energy that has strengthened is pushed charged particle to colelctor electrode 403, has increased the possibility that airborne particulate (as dust) adsorbs and be retained in colelctor electrode 403 surfaces simultaneously.
Fig. 5 A is depicted as the modification of the structure shown in Fig. 5, wherein, has substituted the collector structure of Fig. 4 A shown in Fig. 4 B and Fig. 4 C with the part skeleton shape structure of the colelctor electrode 403A that discusses.
Fig. 5 B also shows the example of structure of some other possible repulsion electrode, it comprise have be positioned at electrode before or after edge and/or at the embodiment of the protuberance in one or more centre positions.Also show among the figure and comprise columniform and possible transverse shape incline structure.
Shown in Figure 6 is another structure of repelling electrode.Wherein, repel space or hole 619 (being breach) that electrode 604 has the electrode body of passing, the space is preferably aimed at the projection 414 of colelctor electrode 403 and is consistent.Therefore, hole 619 is also aimed at projection 414, so that repel the opening of electrode start from or after a while in the ascending air part of (being down current) one initial close projection (in a colelctor electrode), the terminal down current that the hole terminates in projection partly or the position at edge or in the back of this position.Must notice that in order to express easily, although hole 619 is painted as a special solid, can there be many modification in the hole, it comprises a large-scale hole and a groove.
Hole 619 further promotes turbulent flow, the removing that has also improved particulate in addition.Simultaneously, this structure has avoided producing an excessive electric field increment, and this electric field increment may be caused near repelling electrode 604 by the sharp keen edge of projection 414.
Note that circular or columniform projection 517 and 607 lays respectively at the upper reaches end (leading edge) and the dirty end (trailing edge) of the far-end that repels electrode 504 and 604 ends.This configuration has reduced to repel the possibility of the electric field generation electrical breakdown between electrode and the colelctor electrode, and the situation when particularly being located at centre position near electrode with these projections is compared.Experimental data shows: the potential difference of repelling between electrode and the colelctor electrode is a very important factor to the dust collection efficiency of optimizing device.Structure of the present invention is the potential difference between these electrode groups, is not impelling the intervention fluid, as passes air and beat under the puncture situation of arc and/or electric spark and to keep peaked requirement to be guaranteed.
It is also to be noted that in the embodiment shown in fig. 6, repel the dirty or trailing edge the inside of the dirty or trailing edge of electrode 604 at colelctor electrode, promptly outlet edge is in than the more close inlet of the outlet edge of colelctor electrode.This position relation has further improved the control of dust ability, reduces outlet or the blast pipe of ion by array and device simultaneously and flows out or reach to minimum.
Fig. 7 is the photo corresponding to the structure of the colelctor electrode of Fig. 2, and wherein, stacked multilayer conductive material is to form the leading edge structure of a circle.
Although described some embodiment of the present invention in conjunction with the accompanying drawings, the present invention other embodiment and remodeling all within the scope of the present invention.In addition, can also do other modification and improvement, and other some features can be combined among this announcement.For example, on December 2nd, 2003 submitted to, application number is xxx, xxx (acting on behalf of file number 432.008/10101579), the U.S. Patent application that name is called " corona discharge electrode and method of operating " has described some structures and method in detail, and it has narrated the structure of a corona electrode and the renovation process and the device of corona electrode; These can be in conjunction with within the spirit and scope of the present invention, so that further enhancing and feature to be provided.
Should notice and be appreciated that those skilled in the relevant art's of the present invention technical merit is all expressed in all publications, patent and the patent application of mentioning in this specification.All publications, patent and patent application are attached to for referencial use to a certain extent herein, seem each part publication, patent or patent application do seriatim respectively as a whole quote for referencial use.
Claims (42)
1. static air cleaning device, it comprises: a plurality of corona electrodes with each self-ionized edge and, at least one complementation electrode, this electrode has a flat substantially part and in a side surface direction, substantially the outward extending jut of institute's required direction that flows perpendicular to a fluid.
2. static air cleaning device according to claim 1 is characterized in that: described plane and jut extend jointly with width at described complementation electrode substantially.
3. static air cleaning device according to claim 1 is characterized in that: described jut comprises the part that a thickness is thicker than the thickness of described flat part.
4. static air cleaning device according to claim 1 is characterized in that: described projection comprises the part that a thickness is identical with the thickness of described flat part substantially.
5. static air cleaning device according to claim 1 is characterized in that: the distance that described jut extends in side surface direction is greater than the thickness of described flat part.
6. static air cleaning device according to claim 1 is characterized in that: described jut comprises that the forward position zone and of impelling fluid to be substantially laminar flow on described fluid flow direction impels fluid turbulent flow back along the zone substantially.
7. static air cleaning device according to claim 1 is characterized in that: described jut is arranged to impel particle deposition in the fluid on described complementation electrode.
8. static air cleaning device according to claim 1 is characterized in that: described jut forms a fluid deceleration area.
9. static air cleaning device according to claim 1 is characterized in that: the characteristic Reynold's number of described jut is less than at least two orders of magnitude of maximum Reynolds number of described planar section.
10. static air cleaning device according to claim 9 is characterized in that: the Reynolds number of described jut is less than 100, and the maximum Reynolds number of described planar section is greater than 1000.
11. static air cleaning device according to claim 1 is characterized in that: described jut is made a cylinder.
12. static air cleaning device according to claim 1, it is characterized in that: described jut is made for a semicylinder with curved surface, described surface from described colelctor electrode outwards and, one is attached to described planar section and flat substantially wall shape surface.
13. static air cleaning device according to claim 1 is characterized in that: described jut is made for a pipe.
14. static air cleaning device according to claim 1 is characterized in that: described jut is made for a semicircle pipe with curved surface, and is outside from described colelctor electrode.
15. static air cleaning device according to claim 1, it is characterized in that: it further comprises a plurality of described complementation electrodes, its configuration that is parallel to each other substantially, and along described side surface direction space, described complementation electrode the institute's required direction that flows with fluid substantially parallel vertically on spaced apart with corona electrode.
16. static air cleaning device according to claim 1 is characterized in that: described jut has comprised that from one the plane of described planar section stretches out, and one equals the distance of the thickness of described planar section at least.
17. static air cleaning device according to claim 16, it is characterized in that: the thickness of described planar section is identical substantially, and along one in parallel longitudinal extension one length of direction that requires with fluid flows substantially, it is at least 5 times of longitudinal length of described jut.
18. static air cleaning device according to claim 1 is characterized in that: it comprises that further one collects part, and itself and described jut be the part of described at least planar section at interval, and described collection part stretches out in described side.
19. static air cleaning device according to claim 18 is characterized in that: the described part of collecting is extended with the width of described complementation electrode is same substantially.
20. static air cleaning device according to claim 18 is characterized in that: described collection unit branch comprises an inclined-plane, and it increases along described complementation electrode height gradually being parallel on the desired airflow direction.
21. static air cleaning device according to claim 18 is characterized in that: described collection unit branch comprises a wedge body, and its opposite planar surface from described planar section stretches out.
22. static air cleaning device according to claim 1 is characterized in that: its further comprise many to adjacent described complementation electrode and described many to the repulsion electrode between the adjacent complementation electrode.
23. static air cleaning device according to claim 22 is characterized in that: described repulsion electrode comprises one along the leading edge of described repulsion electrode and the jut of trailing edge formation.
24. static air cleaning device according to claim 22 is characterized in that: described repulsion electrode comprises that one is positioned at the jut of intermediate portion.
25. static air cleaning device according to claim 22 is characterized in that: described repulsion electrode comprises a hole that partly forms therebetween.
26. static air cleaning device according to claim 1 is characterized in that: it comprises that further one is connected with described complementation electrode with described corona electrode, and the high voltage source of available generation one corona discharge.
27. static air cleaning device, it comprises: a plurality of corona electrodes with each ionization edge and at least onely have a flat substantially part and a colelctor electrode of a rising part, the described rising part distance greater than the nominal thickness of described planar section that stretches out on a height of the flat substantially part in described ground.
28. static air cleaning device according to claim 27 is characterized in that: described rising part forms on a leading edge of described colelctor electrode.
29. static air cleaning device according to claim 27 is characterized in that: described rising part forms on the mid portion of described colelctor electrode.
30. static air cleaning device according to claim 27 is characterized in that: described rising part forms on the leading edge portion of described colelctor electrode and mid portion.
31. static air cleaning device according to claim 30 is characterized in that: the described rising part that forms in leading edge comprises a curved surface, and the described surface that comprises an inclination at mid portion formation rising part.
32. static air cleaning device according to claim 30 is characterized in that: it comprises that further one is positioned near many repulsion electrode in the middle of the described colelctor electrode.
33. static air cleaning device according to claim 32 is characterized in that: described described repulsion electrode comprises a rising part that forms at the edge on its opposite.
34. static air cleaning device according to claim 32 is characterized in that: described repulsion electrode comprises that one is positioned at the rising part of intermediate portion.
35. static air cleaning device according to claim 32 is characterized in that: described repulsion electrode comprises a hole that partly forms therebetween.
36. a static air cleaning device, it comprises:
A plurality of first corona electrodes, it has ionization edge separately;
A plurality of second colelctor electrodes, it has tabular substantially side and spaced apart with it;
The a plurality of the 3rd repels electrodes, and it is spaced apart and be parallel to colelctor electrode substantially; And
One power supply, it couples together to described corona electrode, colelctor electrode and repulsion electrode power supply, to produce a highdensity electric field in the interior electrode space between described corona electrode, colelctor electrode and repulsion electrode, described colelctor electrode has a side, it comprises that one causes the projection of turbulent flow, and described turbulent flow is passed near the interior electrode channel between described colelctor electrode and the repulsion electrode.
37. static air cleaning device according to claim 36 is characterized in that: the leading edge of described each colelctor electrode has the projection of a circle.
38. according to the described static air cleaning device of claim 37, it is characterized in that: the total height of described circular projection is 4mm at least, evenly is no more than 2mm near the nominal thickness of a planar section of the described repulsion electrode at described edge.
39. static air cleaning device according to claim 36 is characterized in that: the leading edge of each described colelctor electrode has the projection of a semicircle.
40. static air cleaning device according to claim 36 is characterized in that: the potential difference at the edge of the electrode of the most close air flue outlet is maximum with respect to corona electrode.
41. static air cleaning device according to claim 36 is characterized in that: the current potential at the edge of the electrode of the most close described air flue outlet remains earth potential substantially.
42. static air cleaning device according to claim 36 is characterized in that: described ledge has a side, and this side impels a laminar flow near its leading edge.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2005/014934 WO2006135353A1 (en) | 2005-04-29 | 2005-04-29 | Electrostatic air cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101213025A true CN101213025A (en) | 2008-07-02 |
Family
ID=37532602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580050293.3A Pending CN101213025A (en) | 2005-04-29 | 2005-04-29 | Static air cleaning device |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1885502A4 (en) |
| JP (1) | JP2008539067A (en) |
| CN (1) | CN101213025A (en) |
| AU (1) | AU2005333037A1 (en) |
| CA (1) | CA2611186A1 (en) |
| EA (1) | EA012251B1 (en) |
| MX (1) | MX2007013382A (en) |
| WO (1) | WO2006135353A1 (en) |
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| CN101832605A (en) * | 2010-03-31 | 2010-09-15 | 苏州贝昂科技有限公司 | Air conditioner with built-in air cleaning system |
| CN103008106A (en) * | 2012-12-28 | 2013-04-03 | 苏州贝昂科技有限公司 | Gas purification device and system |
| CN104080539A (en) * | 2012-12-26 | 2014-10-01 | 阿高·克里奇塔佛维奇 | Electrostatic air conditioner |
| WO2014194813A1 (en) * | 2013-06-04 | 2014-12-11 | 苏州贝昂科技有限公司 | Ion air purifier and discharge monitoring and protective circuit of high-voltage ion purifier |
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| JP5879470B2 (en) * | 2010-01-18 | 2016-03-08 | パナソニックＩｐマネジメント株式会社 | Dust collector |
| WO2013173528A1 (en) | 2012-05-15 | 2013-11-21 | University Of Washington Through Its Center For Commercialization | Electronic air cleaners and method |
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- 2005-04-29 CN CN200580050293.3A patent/CN101213025A/en active Pending
- 2005-04-29 AU AU2005333037A patent/AU2005333037A1/en not_active Abandoned
- 2005-04-29 MX MX2007013382A patent/MX2007013382A/en unknown
- 2005-04-29 JP JP2008508813A patent/JP2008539067A/en active Pending
- 2005-04-29 WO PCT/US2005/014934 patent/WO2006135353A1/en active Application Filing
- 2005-04-29 EP EP05744060A patent/EP1885502A4/en not_active Withdrawn
- 2005-04-29 EA EA200702391A patent/EA012251B1/en not_active IP Right Cessation
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Also Published As
| Publication number | Publication date |
|---|---|
| EP1885502A1 (en) | 2008-02-13 |
| EP1885502A4 (en) | 2010-12-15 |
| CA2611186A1 (en) | 2006-12-21 |
| WO2006135353A1 (en) | 2006-12-21 |
| JP2008539067A (en) | 2008-11-13 |
| EA012251B1 (en) | 2009-08-28 |
| EA200702391A1 (en) | 2008-04-28 |
| MX2007013382A (en) | 2008-01-18 |
| AU2005333037A1 (en) | 2006-12-21 |
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