CN104028377A - Dedusting apparatus and method - Google Patents
Dedusting apparatus and method Download PDFInfo
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- CN104028377A CN104028377A CN201410203619.2A CN201410203619A CN104028377A CN 104028377 A CN104028377 A CN 104028377A CN 201410203619 A CN201410203619 A CN 201410203619A CN 104028377 A CN104028377 A CN 104028377A
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Abstract
The invention discloses a dedusting apparatus and a method. The dedusting apparatus comprises a main housing, an air intake system, an air exhaust system, a flow-resisting system, an anode plate module consisting of multiple anode plates, a cathode line module consisting of multiple cathode lines, an anode vibrating system, a cathode vibrating system, an ash bucket system and a power supply system; the anode plate module and the cathode line module are alternatively arranged at a preset distance at a preset angle along the axial direction of the main housing; and the dedusting apparatus is characterized in that the anode plate module and the cathode line module are arranged in a non-linear manner and are capable of circulating a gas, so that a vortex turbulent flow is generated when a gas containing dust passes through the anode plate module. According to the dedusting apparatus and the method, under the co-absorption effect of electric field effect and the vortex turbulent flow, the opportunity of capturing dust is substantially improved and the dedusting efficiency is improved.
Description
Technical field
The invention belongs to dedusting field, particularly utilize electric field to carry out the apparatus and method of dedusting.
Background technology
Electric cleaner uses existing over one hundred year history from invention in 1907, during it has made contribution difficult to the appraisal for the mankind's environmental protection cause.Yet, because China improves constantly the discharge index of atmosphere pollution, some areas have proposed the new file that new Atmospheric particulates discharge standard is 20 milligrams/mark cubic meter, make a large amount of online electric cleaners of particularly going into operation 2～3 years that use cannot reach new discharging standards requirement.
In order to make electric cleaner up to standard, just need to improve the efficiency of dust collection of electric cleaner.The essential structure of current conventional electric cleaner and force analysis are as shown in Figure 1, wherein air intake direction 10 is parallel with the direction of positive plate 55, cathode line 66, thereby make dust 100 in the flue gas suffered direction of wind-force Ff and the direction of Coulomb force Fe orthogonal, cause many dust also to have little time by positive plate 55, to be caught absorption under the effect of Coulomb force Fe and just by wind-force Ff, blown away discharge deduster, thereby reduce efficiency of dust collection.For the deduster of this type, in order to improve efficiency of dust collection, mainly take following several method:
1) improve electric-field intensity, change power supply as EHT supply, variable-frequency power sources, the pulse power etc.
2) increase dust-collecting area, as increased, widen lengthening electric field.
3) change the structure of deduster, as improve rapping power, last electric field adds rotary electrode etc.
Above-mentioned several method, the amplitude that improves efficiency of dust collection is limited, and has increased the investment of equipment, is still difficult to meet new Atmospheric particulates discharge standard.This is the weak point of traditional conventional electric cleaner.
So no matter from the viewpoint of energy-saving and emission-reduction or from cost-saving, a kind of rational renovation technique of traditional electrical deduster urgent need is upgraded.
In recent years, people propose again to reach by the method for horizontal anode the efficiency that improves dedusting.In the Chinese patent application that is 200610047496.3 at application number, proposed to use the horizontal positive plate of open type as collecting plate, flow of flue gas direction is vertical with the direction of the positive plate of open type; This kind of penetrating positive plate is that one group of planar anode plate or simple bent plate are arranged in parallel and combine at a certain distance.The feature of this kind of horizontal positive plate is: the direction of flow of flue gas is vertical with the positive plate of open type, parallel with the direction of electric field Coulomb force, during the air vent of flue gas in the positive plate by open type, by positive plate, by strong electrostatic field Coulomb attraction power, is caught.Application number is that 201220165631.5 Chinese patent application is also similar structure, and the horizontal positive plate of its open type is simple blinds shape.
Experimental result shows, the positive plate that structure in above-mentioned two patent applications forms, under the condition of the voltage drop between equal negative electrode and positive electrode plate and distance, when the distance in each positive plate in horizontal positive plate electric cleaner between adjacent positive plate shortens to 40mm by traditional routine intravenous electric cleaner middle-jiao yang, function of the spleen and stomach pole plate to the distance 400mm adjacent anode, adjacent positive plate in horizontal positive plate electric cleaner and the electric-field intensity between positive plate, compare the electric-field intensity of the positive plate near surface in traditional routine intravenous electric cleaner, not only significantly do not strengthen 100 times for it, significantly reduce on the contrary.Its reason is, the Coulomb's law of the institute's foundation in these two structures
be only applicable to point charge Q
1with another point charge Q
2between the description of statcoulomb power F, and be suitable for horizontal positive plate, be not the structure that one group of positive plate is arranged in a combination at a certain distance.
In order to overcome the problems referred to above, this area is needed a kind of apparatus and method that significantly reduce dust granules concentration of emission badly.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: how significantly to reduce the concentration of emission of dust granules, improve dust arrester and the adsorption effect of method to dust granules.
(2) technical scheme
In order to solve the problems of the technologies described above, the present invention proposes a kind of dust arrester, comprise body shell, air inlet system, exhaust system, choked flow system, the positive plate module being formed by a plurality of positive plates, many the cathode line modules that cathode line forms, anode rapping system, cathode rapping system, ash bucket system and electric power system, described positive plate module and cathode line module along the axis direction of described body shell with preset distance, predetermined angular is arranged alternately, it is characterized in that, described positive plate module and cathode line module are with nonlinear, the mode that gas is connected arranges, make to produce vortex turbulent flow during by described positive plate module when the gas that contains flue dust.
Wherein, described positive plate module is arranged and is formed by preset space length and angle by least one positive plate.
Wherein, the shape of cross section of described positive plate one of is following shape or its combination: solid shape, annular, fold-line-shaped, arc line shaped, boss shape.
Wherein, centre distance between adjacent positive plate is 2mm-200mm, angle between the axis of the axis of positive plate and positive plate module is 0-90 degree, when the shape of cross section of described positive plate is solid ring shape, its dimension is 1mm-100mm, when the shape of cross section of described positive plate is fold-line-shaped, arc line shaped or boss shape, its dimension is 1mm-100mm, and broken line width, camber line width or boss height are 1mm-100mm.
Wherein, the distance between adjacent described positive plate module axis is 200mm-600mm; Distance between adjacent described cathode line module axis is 200mm-600mm; The positive plate of adjacent described positive plate module towards between angle be 0-90 degree.
Wherein, the positive plate number in adjacent described positive plate module is identical or differ 1; Its arrangement mode is symmetrical along body shell central axis.
Wherein be provided with n described positive plate module and n-1 cathode line module, and described n > 1.
Wherein, every m positive plate module and m-1 cathode line module form a module group, a module group, apply the single electric field module group of electric field formation that a high voltage source provides; A plurality of this kind of single electric field module group series connection form many electric fields electric cleaner; Wherein said m > 1 and m≤n.
Wherein, every k positive plate module forms a sub-positive plate module group and an anode vibration dust-cleaning system is set thereon; Every k cathode line module forms a sub-cathode line module group and a cathode rapping soot cleaning system is set thereon; Each vibration dust-cleaning system is by automatic controlling system, and the vibration dust-cleaning that circulates successively one by one; And the dust that has the rapping of ash bucket systematic collection to get off; Wherein said k >=1 and k≤m.
Wherein, in the air inlet place of described body shell or housing, other arbitrary positions arrange flue gas conditioning device
Wherein, described electric power system is included as pulsed high voltage source.
The invention allows for a kind of dust collection method, comprise the following steps:
The gas that contains flue dust enters in the body shell of a dust arrester by air inlet system and choked flow system;
Described gas is successively by the positive plate module and the cathode line module that are arranged alternately along described body shell, described positive plate module is comprised of a plurality of positive plates with predetermined cross-section shape, cathode line module is comprised of many cathode line, described positive plate module be arranged so that described gas by time produce vortex turbulent flow;
The field effect that described positive plate and described cathode line produce and described vortex turbulent flow produce suction-operated to the flue dust in described gas jointly, thereby described flue dust is adsorbed in described positive plate module and described cathode line module;
By positive plate module and described cathode line module described in anode rapping system and cathode rapping system successively rapping;
By ash bucket system by described flue dust collecting and clear out of described dust arrester.
(3) beneficial effect
According to dust arrester of the present invention and method, nonlinear geometry structure and specific size thereof due to the positive plate in each positive plate module, and the space matching relationship between every two adjacent positive plates and specific size thereof, static electric field intensity between every two adjacent positive plates is got the maximum optimization, make flue gas when often passing through the gap between two adjacent positive plates simultaneously, capital produces the vortex turbulent flow that is conducive to adsorb flue dust, the effective means of dedusting will be converted into as the vortex turbulent flow of unfavorable factor in traditional dust arrester and method.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only examples more of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is essential structure and the force analysis schematic diagram of traditional electrical dust arrester.
Fig. 2 is the top cross-sectional view of dust arrester of the present invention;
Fig. 3 is the side generalized section of dust arrester of the present invention
Fig. 4 is the choked flow system architecture schematic diagram of dust arrester of the present invention;
Fig. 5 is the schematic diagram of the force analysis of dust granules between cathode-anode plate in the present invention;
Fig. 6 a is the cross sectional representation of the solid ring shape of middle-jiao yang, function of the spleen and stomach pole plate of the present invention;
Fig. 6 b is the simple fold-line-shaped of middle-jiao yang, function of the spleen and stomach pole plate of the present invention or the cross sectional representation of arc line shaped;
Fig. 6 c is the cross sectional representation of the boss shape of middle-jiao yang, function of the spleen and stomach pole plate of the present invention;
Fig. 7 is the three-dimensional structure schematic diagram of middle-jiao yang, function of the spleen and stomach pole plate of the present invention;
Fig. 8 is the schematic diagram of the embodiment of the present invention one Anodic plate module and the combination of cathode line module;
Fig. 9 is the combination schematic diagram of the embodiment of the present invention two Anodic plate module and cathode line module;
Figure 10 is the combination schematic diagram of the embodiment of the present invention three Anodic plate module and cathode line module;
Figure 11 is the combination schematic diagram of the embodiment of the present invention four Anodic plate module and cathode line module;
Figure 12 is the schematic diagram that the embodiment of the present invention five Anodic plate module groups and cathode line module group different spaces distribute;
Figure 13 is the schematic diagram that the embodiment of the present invention six Anodic plate module groups and cathode line module group different spaces distribute;
Figure 14 is that in the present invention, air flow stream is crossed the schematic diagram that cylinder forms vortex, turbulent flow;
Figure 15 is that the cross section of middle-jiao yang, function of the spleen and stomach pole plate of the present invention is that in circular dust arrester, smoke gas flow is crossed the schematic diagram that positive plate module, cathode line module form turbulent flow;
Figure 16 is that in the cross section of single positive plate in the present invention dust arrester that is boss shape, smoke gas flow is crossed the schematic diagram that positive plate module, cathode line module form turbulent flow.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, ordinary skill people, not making the every other embodiment obtaining under creative work prerequisite, belongs to the scope of protection of the invention.
Embodiment mono-
Referring to Fig. 2-7, the dust arrester of the embodiment of the present invention one has body shell 1, air inlet system 2, exhaust system 3, choked flow system 4.Air inlet system 2 is preferably as inlet box, and choked flow system 4 is preferably an air distribution plate with holes, and its shape can be fish scale-shaped shape, as shown in Figure 4; Positive plate module 5 and cathode line module 6, along the axis of body shell 1 non-linearly, be arranged alternately to connectivity." non-linear " in the present invention refers to the geometrical property that produces vortex turbulent flow in the time of making gas pass through certain space geometry structure.Positive plate module 5 comprises a plurality of positive plates 51, and the shape of its cross section can arrange shown in Fig. 6 a, Fig. 6 b and Fig. 6 c; Cathode line module 6 comprises a plurality of cathode line 61, and it can be fish-bone line cathode, can be also RS prickle line cathode (not shown); Dust arrester of the present invention also comprises anode rapping system and cathode rapping system, Sole anode vibrated system 71 can be the tangential vibrated system of antianode plate module, also can be normal direction vibrated system, be illustrated as tangential vibrated system schematic diagram, normal direction vibrated system be not shown; Single cathode rapping system 81 can be the tangential vibrated system of target wire module, can be also normal direction vibrated system, is illustrated as tangential vibrated system schematic diagram; 91 is single ash bucket system.Electric power system in dust arrester of the present invention, control system, heating system, heat-insulation system, choked flow system etc. can adopt the system of this area routine.Wherein high voltage supply system can be DC high-voltage power supply; In order further to improve turbulence effect and electric field efficiency of dust collection, its high voltage source can be also pulsed high voltage source.
The flue gas 10 that contains flue dust enters deduster body shell 1 by air inlet system 2 and choked flow system 4, and 4 pairs of flue gases of choked flow system 10 carry out thick dedusting and equal wind and reduce wind speed, make the wind speed of flue gas 10 and dustiness be reduced to rapidly suitable scope; The positive plate module 5 of the nonlinear connectivity that then flue gas 10 is arranged alternately by the axis along body shell 1 successively and cathode line module 6, Sole anode plate 51 in positive plate module 5 has particular geometric configuration, by one group positive plate 51 at a certain distance, certain angle is arranged in a combination, thereby the space geometry structure of positive plate module 5 makes flue gas 10 produce vortex turbulent flow 101 (as shown in Figure 14-16) by it; Under the acting in conjunction of the field effect between positive plate 51 and cathode line 61 and turbulence effect 101, dust in flue gas 10 is caught rapidly absorption by positive plate module 5 and cathode line module 6, then by anode rapping system 71 and cathode rapping system 81 its corresponding positive plate module 5 and cathode line module 6 of rapping successively one by one under the control of automatic control system (not shown), the dust rapping being adsorbed in positive plate module 5 and cathode line module 6 is got off, by ash bucket system 91 from the below of body shell by dust collection and clear out of deduster; Finally by the flue gas 10 of crossing high efficiency dedusting, becoming clean gas 11 discharges by air exhaust box exhaust system 3.
On inlet box 2 or in body shell 1, arbitrary position can arrange a flue gas conditioning device 12, in order to improve the character such as humidity of flue gas, to improve the efficiency of dedusting.
In addition, for improving turbulence effect, described DC high-voltage power supply can change pulsed high voltage generator into, not shown.
For the configuration of positive plate module, cathode line module, in body shell, be provided with n positive plate module and n-1 cathode line module, and described n > 1; Every m positive plate module and m-1 cathode line module form an anode and cathode module group, an anode and cathode module group, apply the single electric field module group of electric field formation that a high voltage source provides; A plurality of this kind of single electric field module group series connection form many electric fields electric cleaner; Wherein said m > 1 and m≤n; This high voltage power supply is not shown.In addition, every k anode module 5 forms a sub-anode module group and an anode vibration dust-cleaning system 71 is set thereon; Every k cathode line module 6 forms a sub-cathode line module group and a cathode rapping soot cleaning system 81 is set thereon; Each vibration dust-cleaning system is by automatic controlling system, and the vibration dust-cleaning that circulates successively one by one; Wherein said k >=1 and k≤m.
Fig. 5 is the schematic diagram of the force analysis of dust granules between cathode-anode plate in the present invention.Referring to Fig. 5 a, in electric cleaner in the present invention, air intake direction 10 is mutually vertical with cathode-anode plate, thereby make the direction of the suffered wind-force Ff of dust 100 in flue gas identical with the direction of Coulomb force Fe, referring to Fig. 5 b, thereby making originally in traditional electrical deduster, to harm electronegative dust granules 100 is attracted the wind-force Ff catching to become on the contrary the thrust that directly dust 100 is blowed to positive plate 51 by positive plate 51, under the acting in conjunction of Coulomb force Fe and wind-force Ff, dust granules 100 is pushed fast to positive plate 51 and is caught absorption by it, thereby improve greatly efficiency of dust collection.
Fig. 6 a, Fig. 6 b and Fig. 6 c are the part cross sectional representation of various nonlinear positive plate 51 used in the present invention.The closed curve that is shaped as one or more than one straight lines or curve composition of the cross section of this nonlinear positive plate 51, comprising: one: solid ring shape, as shown in Figure 6 a, comprise polygon and the hollow types thereof such as circle, square, rectangle, triangle, rhombus, trapezoidal, pentagon, pentagon, hexagon; Two: simple fold-line-shaped or arc line shaped, as shown in Figure 6 b, comprise semicircle, half square, half rectangle; Three: boss shape, as shown in Fig. 6 c, comprises triangle boss shape, rectangular boss shape, trapezoid boss shape, bent limit boss shape, bent limit trapezoid boss shape etc.
Fig. 7 is the three-dimensional structure schematic diagram of positive plate used in the present invention, and the cross section of described non-linear positive plate can be the circle shown in Fig. 6 a in a preferred embodiment; In other preferred embodiments, the cross section of described non-linear positive plate can be the boss shape shown in the simple broken line type shown in Fig. 6 b or Fig. 6 c.The diameter of the cross section of these positive plates or dimension w are 1mm-100mm; The broken line width h of cross section or boss height h are 1mm-100mm.Maximum length (wide) degree when dimension refers to that object is measured from all directions.
When the shape of cross section of positive plate is solid ring shape, its dimension is 1mm-100mm, when the shape of cross section of described positive plate is fold-line-shaped, arc line shaped or boss shape, its dimension is 1mm-100mm, and broken line width, camber line width or boss height are 1mm-100mm.
Fig. 8 is that the cross section of the embodiment of the present invention one middle-jiao yang, function of the spleen and stomach pole plate is circular positive plate module and the schematic diagram of cathode line module combination.In the present embodiment, positive plate module 5 is to be that circular positive plate 51 is arranged by certain center distance and is formed by connecting by positive plate connection horizontal stripe 52 by one group of cross section; The diameter of each positive plate 51 is 1mm-100mm; Centre distance between every two adjacent positive plates 51 is 2mm-200mm.Cathode line module 6 is arranged, by cathode line connection horizontal stripe 62, is formed by connecting by certain center distance by one group of cathode line 61; Centre distance between every two adjacent single cathode line 61 is 2mm-200mm.Distance between every two adjacent positive plate module axis (be connected in the present embodiment horizontal stripe 52 place straight lines with positive plate and overlap, be not shown) is 200mm-600mm; Distance between every two adjacent cathode line module axis (be connected in the present embodiment horizontal stripe 62 place straight lines with cathode line and overlap, be not shown) is 200mm-600mm.
Embodiment bis-
Fig. 9 is that the cross section of the embodiment of the present invention two middle-jiao yang, function of the spleen and stomach pole plates is the positive plate module of a boss shape and the schematic diagram of cathode line module combination.The difference of the present embodiment and embodiment mono-is, the positive plate 51 that figure Anodic plate module 5 is boss shape by one group of cross section is arranged in parallel by certain center distance and connects horizontal stripe 52 by positive plate and is formed by connecting; The dimension of each positive plate is 1mm-100mm; The boss height of cross section is 1mm-100mm; Centre distance between every two adjacent positive plates is 2mm-200mm, angle between the axis of the axis of positive plate 51 (being the symmetry axis place straight line of positive plate 51) and its positive plate module 5 (be connected in the present embodiment horizontal stripe 52 place straight lines with positive plate and overlap, be not shown) is 0 degree.Cathode line module 6 is arranged, by cathode line connection horizontal stripe 62, is formed by connecting by certain center distance by one group of cathode line 61; Centre distance between every two adjacent cathode line is 2mm-100mm.Distance between every two adjacent positive plate module axis is 200mm-600mm; Distance between every two adjacent cathode line module axis (be connected in the present embodiment horizontal stripe 62 place straight lines with cathode line and overlap, be not shown) is 200mm-600mm; The positive plate of every two adjacent positive plate modules towards between angle be 0 degree (positive plate that is adjacent anode module be arranged in parallel).
Embodiment tri-
Figure 10 is that the cross section of the embodiment of the present invention three middle-jiao yang, function of the spleen and stomach pole plates is the positive plate module of a boss shape and the schematic diagram of cathode line module combination.The difference of the present embodiment and embodiment mono-is, the positive plate 51 that figure Anodic plate module 5 is boss shape by one group of cross section is arranged in parallel by certain center distance and is formed by connecting by positive plate connection horizontal stripe 52 (not shown), and the positive plate 51 of this boss shape exists the inclination of certain angle with respect to the axis of positive plate module 5; The dimension of each positive plate 51 is 1mm-100mm; The boss height of cross section is 1mm-100mm; Centre distance between every two adjacent positive plates is 2mm-200mm, and the angle a between the axis 53 of positive plate 51 and the axis 54 of its positive plate module 5 is 0-90 degree.In figure, cathode line module 6 is arranged, by connecting horizontal stripe 62 (not shown), is formed by connecting by certain center distance by one group of list cathode line 61; Centre distance between every two adjacent cathode line is 2mm-100mm.Distance between every two adjacent positive plate module axis is 200mm-600mm; Distance between every two adjacent cathode line module axis is 200mm-600mm; The positive plate of every two adjacent positive plate modules towards between angle be 0 degree.
Embodiment tetra-
Figure 11 is that the cross section of single positive plate in the embodiment of the present invention four is the positive plate module of a boss shape and the schematic diagram of cathode line module combination.The difference of the present embodiment and embodiment mono-is, the positive plate 51 that figure Anodic plate module 5 is boss shape by one group of cross section is arranged in parallel by certain center distance and is formed by connecting by connecting horizontal stripe 52 (not shown), and the positive plate between adjacent anode plate module 5 towards between there is certain angle; The dimension of each positive plate 51 is 1mm-100mm; The boss height of cross section is 1mm-100mm; Centre distance between every two adjacent positive plates is 2mm-200mm, and the angle a between the axis 53 of positive plate 51 and the central axis 54 of its positive plate module 5 is 0-90 degree.In figure cathode line module 6 by one group of list cathode line 61 by certain center distance arrange, horizontal stripe 62 (not shown) connects by connecting and; Centre distance between every two adjacent single cathode line is 2mm-100mm.Distance between every two adjacent positive plate module axis is 200mm-600mm; Distance between every two adjacent cathode line module axis is 200mm-600mm; The positive plate of every two adjacent positive plate modules towards between angle be 2a degree.
Embodiment five
Figure 12 is the schematic diagram that in the embodiment of the present invention five, cathode-anode plate module group different spaces distributes.The difference of the present embodiment and embodiment mono-is, positive plate number in every two adjacent positive plate modules 5 is identical or differ 1; Its arrangement mode is symmetrical along body shell central axis, and wherein in cathode line module 6, the quantity of cathode line 61 is identical with adjacent anode plate module 5 middle-jiao yang, function of the spleen and stomach quantity of polar plate smaller values.
Embodiment six
Figure 13 is the schematic diagram that in the embodiment of the present invention six, cathode-anode plate module group different spaces distributes.The difference of the present embodiment and embodiment mono-is, single positive plate number in every two adjacent positive plate modules is identical or differ 1; Its arrangement mode is symmetrical along body shell central axis; Wherein in cathode line module 6, the quantity of cathode line 61 is identical with adjacent anode plate module Anodic plate quantity higher value.
Figure 14 is that the cross section of middle-jiao yang, function of the spleen and stomach pole plate of the present invention is that in circular dust arrester, smoke gas flow is crossed the schematic diagram that positive plate module, cathode line module form turbulent flow.To be flue gas 10 produce the schematic three dimensional views of vortexs, turbulent flow 101 with certain speed Uo non-linear positive plate 51 of flowing through to Figure 14 a; Figure 14 b is that flue gas produces the two-dimensional representation of vortex, turbulent flow 101 through non-linear positive plate 51 with certain data rate stream.
Figure 15 is that the cross section of middle-jiao yang, function of the spleen and stomach pole plate 51 of the present invention is that in circular dust arrester, flue gas 10 flows through the schematic diagram that positive plate module 5, cathode line module 6 form turbulent flows 101.
Figure 16 is that in the cross section of the middle-jiao yang, function of the spleen and stomach pole plate 51 of the present invention dust arrester that is boss shape, flue gas 10 flows through the schematic diagram that positive plate module 5, cathode line module 6 form turbulent flows 101.
The present invention also proposes a kind of dust collection method, and the gas that contains flue dust 10 is entered in deduster body shell 1 by air inlet system 2 and choked flow system 4; Choked flow system 4 is a panel with many through holes, scale type air distribution plate as shown in Figure 4; In flue gas 10, some large dust granules directly impinge upon on the wooden partition of choked flow system 4 then due to gravitational effect, are directly deposited in ash bucket system 91; Thereby 4 pairs of flue gases 10 of choked flow system reach thick dedusting and equal wind and reduce the effect of wind speed, make the wind speed of flue gas 10 and dustiness be reduced to rapidly suitable scope.In gap in gap in the positive plate module 5 of the nonlinear connectivity that then flue gas 10 is arranged alternately by the axis along body shell 1 successively between every two adjacent positive plates and the cathode line module 6 of connectivity between every two adjacent cathode line, flow through.Between cathode line 61 and positive plate 51, apply a high electric field, make cathode line 61 that corona discharge phenomenon occur under the effect of high electric field; Dust in flue gas 10 is with negative electrical charge (electronics) behind the corona zone of flowing through, and is attracted under the effect of Coulomb force by positive plate 51; Now, the flow direction of flue gas is the direction that blows to positive plate and cathode line, and the wind-force Ff of flow of flue gas directly blows to positive plate and cathode line by the dust in flue gas 10 again, as shown in Figure 15 and Figure 16; Thereby making originally in traditional electrical deduster, to harm electronegative dust granules is attracted the wind-force Ff catching to become on the contrary the thrust that directly dust is blowed to positive plate by positive plate, under the acting in conjunction of Coulomb force Fe and wind-force Ff, dust granules 100 is pushed fast to positive plate and is caught absorption by it, thereby improves greatly efficiency of dust collection.
In the present invention, nonlinear geometry structure and specific size thereof due to the positive plate 51 in each positive plate 5 module, and the space matching relationship between every two adjacent positive plates 51 and specific size thereof, can bring following two large benefits: first, the device of the application of the invention and method, static electric field intensity in space between every two adjacent positive plates 51 is got the maximum optimization, can not cause the static electric field intensity of the positive plate near surface in script traditional electrical deduster significantly to reduce.For example, experimental result shows, with one group of cross section be circular positive plate 51 form positive plate module 5 time, under the condition of equal cathode-anode plate spacing, distance between adjacent positive plate 51 in each positive plate module 5 in the present invention still can keep the electric-field intensity between its adjacent positive plate 51 under specific small size condition, electric-field intensity with respect to conventional electrostatic deduster middle-jiao yang, function of the spleen and stomach pole plate near surface, there is no significant change, can not cause electric-field intensity significantly to reduce, generally all on the same order of magnitude.Thereby kept in positive plate 5,51 pairs of flue gases of positive plate with the powerful electrostatic field Coulomb attraction power of the dust granules of negative electrical charge.Secondly, dust arrester of the present invention and method make flue gas 10 often by between two adjacent positive plates 51 during gap, all can produce vortex turbulent flow 101.Vortex turbulent flow is harmful to originally in conventional electrostatic deduster, this is because of conventional electrostatic dedusting wherein, distance between positive plate is all very large, namely the width of flue gas is all very large, turbulization in the flue gas of large width, can cause flue gas flow field unstable, the effects such as exhaust gas dust Density inhomogeneity, thus cause the problem of lower efficiency of dust collection.
The present invention, by the setting of shape, size and the mutual alignment of antianode plate and cathode line, makes the vortex turbulent flow in dust arrester and method not only there is no negative effect, brings into play on the contrary following beneficial effect:
(1) near positive plate 51, vortex turbulent flow 101 can further be returned flue gas vortex water conservancy diversion pole plate 51 on the sunny side, and then the dust granules vortex in flue gas is returned to blowing to positive plate 51, improves the chance that dust is captured, and then raising efficiency of dust collection, as shown in Figure 15 and 16.
(2) time that prolong smoke around stops at positive plate, thus the chance being caught by the attraction of dust in 51 pairs of flue gases of positive plate increased, and then improve the efficiency of dedusting.
(3) some in flue gas not electronegative or with the superfine granule of a small amount of negative electrical charge under the effect of vortex, mutually collide with other particles, adhesion, thereby become larger dust granules and absorb more negative electrical charge, thereby thereby improve positive plate Coulomb force and the chance of its seizure absorption have been improved to the efficiency to superfine short grained dedusting greatly.
(4) fine inertia particle is in the vortex of turbulent flow, because centrifugal action will be dished out.At a certain range scale, under the acting in conjunction of acceleration of gravity and electrostatic field, the average settlement speed of particle will obviously increase.
Field experiment result shows, due to special electrode structure, the turbulent flow occurring in flow field greatly improves efficiency of dust collection, especially can effectively remove the particulate below current ben 2.5um, has improved PM2.5 index.
Flue gas is every through a positive plate module, will experience once the dust removal process that above-mentioned turbulence effect and field effect combine; In body shell 1, be provided with n positive plate module 5 and n-1 cathode line module 6, so flue gas is by after these anodic-cathodic module groups, just experienced n dedusting, its efficiency of dust collection, with respect to originally only having 2-4 electric field, the conventional electrostatic deduster that only has 2-4 dedusting, increases substantially again.
On the other hand, through n positive plate module 5, flue gas just obtains the effect of n equal wind, so the above-mentioned turbulence effect of its generation there is no harm concerning whole flue gas flow field stability.
Above embodiment is only for the present invention is described, but not limitation of the present invention.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is carried out to various combinations, revises or is equal to replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim of the present invention and scope.
Claims (12)
1. a dust arrester, comprise body shell, air inlet system, exhaust system, choked flow system, the positive plate module being formed by a plurality of positive plates, many the cathode line modules that cathode line forms, anode rapping system, cathode rapping system, ash bucket system and electric power system, described positive plate module and cathode line module along the axis direction of described body shell with preset distance, predetermined angular is arranged alternately, it is characterized in that, described positive plate module and cathode line module are with nonlinear, the mode that gas is connected arranges, make to produce vortex turbulent flow during by described positive plate module when the gas that contains flue dust.
2. dust arrester as claimed in claim 1, wherein said positive plate module is arranged and is formed by preset space length and angle by least one positive plate.
3. dust arrester as claimed in claim 2, one of the shape of cross section of wherein said positive plate is following shape or its combination: solid shape, annular, fold-line-shaped, arc line shaped, boss shape.
4. dust arrester as claimed in claim 3, wherein the centre distance between adjacent positive plate is 2mm-200mm, angle between the axis of the axis of positive plate and positive plate module is 0-90 degree, when the shape of cross section of described positive plate is solid ring shape, its dimension is 1mm-100mm, when the shape of cross section of described positive plate is fold-line-shaped, arc line shaped or boss shape, its dimension is 1mm-100mm, and broken line width, camber line width or boss height are 1mm-100mm.
5. dust arrester as claimed in claim 4, wherein the distance between adjacent described positive plate module axis is 200mm-600mm; Distance between adjacent described cathode line module axis is 200mm-600mm; The positive plate of adjacent described positive plate module towards between angle be 0-90 degree.
6. dust arrester as claimed in claim 1, wherein the positive plate number in adjacent described positive plate module is identical or differ 1; Its arrangement mode is symmetrical along body shell central axis.
7. dust arrester as claimed in claim 1, is wherein provided with n described positive plate module and n-1 cathode line module, and described n>1.
8. dust arrester as claimed in claim 7, wherein every m positive plate module and m-1 cathode line module form a module group, and the electric field that applies a high voltage source and provide a module group forms a single electric field module group; A plurality of this kind of single electric field module group series connection form many electric fields electric cleaner; Wherein said m>1 and m≤n.
9. dust arrester as claimed in claim 8, wherein every k positive plate module forms a sub-positive plate module group and an anode vibration dust-cleaning system is set thereon; Every k cathode line module forms a sub-cathode line module group and a cathode rapping soot cleaning system is set thereon; Each vibration dust-cleaning system is by automatic controlling system, and the vibration dust-cleaning that circulates successively one by one; And the dust that has the rapping of ash bucket systematic collection to get off; Wherein said k >=1 and k≤m.
10. dust arrester as claimed in claim 1, wherein in the air inlet place of described body shell or housing, other arbitrary positions arrange flue gas conditioning device
11. dust arresters as claimed in claim 1, wherein said electric power system is included as pulsed high voltage source.
12. 1 kinds of dust collection methods, comprise the following steps:
The gas that contains flue dust enters in the body shell of a dust arrester by air inlet system and choked flow system;
Described gas is successively by the positive plate module and the cathode line module that are arranged alternately along described body shell, described positive plate module is comprised of a plurality of positive plates with predetermined cross-section shape, cathode line module is comprised of many cathode line, described positive plate module be arranged so that described gas by time produce vortex turbulent flow;
The field effect that described positive plate and described cathode line produce and described vortex turbulent flow produce suction-operated to the flue dust in described gas jointly, thereby described flue dust is adsorbed in described positive plate module and described cathode line module;
By positive plate module and described cathode line module described in anode rapping system and cathode rapping system successively rapping;
By ash bucket system by described flue dust collecting and clear out of described dust arrester.
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| CN201410203619.2A CN104028377A (en) | 2014-05-14 | 2014-05-14 | Dedusting apparatus and method |
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| CN201410203619.2A CN104028377A (en) | 2014-05-14 | 2014-05-14 | Dedusting apparatus and method |
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Application publication date: 20140910 |