An efficient conductive filter plate electrostatic precipitator

Abstract

An efficient conductive filter plate electrostatic precipitator provided by the present invention comprises a housing and more than two electric fields; each of the electric fields includes a plurality of cathode wire groups and a plurality of anode plate rows; a row of conductive filter plates provided with a plurality of air holes is arranged downstream of the plurality of anode plate rows; a plurality of first cathode wires of one cathode wire group are arranged between any two adjacent anode plate rows on the left and right among the plurality of anode plate rows; one or two second cathode wires of one cathode wire group are arranged between any two adjacent conductive filter plates on the left and right in the row of conductive filter plates; the discharge property of the second cathode wire is significantly weaker than that of the first cathode wire. In the channel between any two adjacent conductive filter plates on the left and right, the dust advancing along with the air flow can continue to be charged or start to be charged; at the same time, the negatively charged dust migrates towards the above-mentioned conductive filter plate, and a part of the negatively charged dust will accumulate thereon.

Description

Technical Field

[0001] The present invention relates to the technical field of electrostatic precipitation, and particularly to a highly efficient conductive filter plate electrostatic precipitator. Background Art

[0002] In the high-voltage electric field of an electrostatic precipitator, a large number of electrons and positive ions are generated through corona discharge; when they encounter dust in the flue gas during the movement towards the opposite electrode, the dust becomes negatively charged dust or positively charged dust; then, these negatively charged dust and positively charged dust tend towards the anode and cathode respectively under the action of the electric field force, and most of the negatively charged dust and positively charged dust will be deposited on the anode and cathode respectively, thereby achieving the purpose of purifying the flue gas.

[0003] When the dusty flue gas travels to any electric field inlet section inside the electrostatic precipitator, the dust concentration distribution at the inlet of each electric field channel is approximately uniform; however, when the dusty flue gas travels to the end section of each electric field channel, the flue gas closer to the anode plate surface has a higher dust concentration, while the flue gas farther from the anode plate surface has a lower dust concentration. Some people have provided a row of conductive filter plates with a plurality of air outlet holes at the downstream of the anode plate row in each electric field of the electrostatic precipitator. Since the air inlets of the above-mentioned conductive filter plates all face the air outlet end of the anode plate directly in front of them, most of the charged dust escaping along the anode plate surface at the rear of the electric field, and most of the secondary dust generated when the anode plate is vibrated for dust cleaning, can enter the above-mentioned conductive filter plates along with the air flow, and can be effectively captured under the dual action of electrostatic adsorption and interception filtration, so that the dust concentration of the flue gas at the outlet of the electrostatic precipitator can be significantly reduced.

[0004] Because a part of the dust entering through the air inlet of the above-mentioned conductive filter plate along with the air flow can escape to the next electric field or the outlet end of the electrostatic precipitator along with the air flow from the air outlet holes of the above-mentioned conductive filter plate; in addition, a small part of the secondary dust generated when the above-mentioned conductive filter plate and the anode plate upstream of it are vibrated for dust cleaning can also escape to the next electric field or the outlet end of the electrostatic precipitator along with the air flow from the channels between the two adjacent conductive filter plates of the above-mentioned conductive filter plate, so the outlet dust concentration of the existing conductive filter plate electrostatic precipitator is still a bit high - naturally, its dust removal efficiency still needs to be improved. Therefore, how to significantly improve the capture efficiency of the conductive filter plate for the charged dust escaping along the anode plate surface at the rear of the electric field and the secondary dust generated when the conductive filter plate and the anode plate upstream of it are vibrated for dust cleaning is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] The present invention provides an efficient conductive filter plate electrostatic precipitator, aiming to significantly improve the capture efficiency of the conductive filter plate for the charged dust escaping along the surface of the anode plate at the rear of the electric field and the secondary dust raising generated when rapping and cleaning the conductive filter plate and the anode plate located upstream thereof, thereby significantly improving the dust removal efficiency of the conductive filter plate electrostatic precipitator.

[0006] The present invention adopts the following technical solutions:

[0007] An efficient conductive filter plate electrostatic precipitator includes a housing and more than two electric fields; each of the electric fields includes a plurality of cathode wire groups and a plurality of anode plate rows; a row of conductive filter plates is arranged downstream of the plurality of anode plate rows; the air inlet of each conductive filter plate in the row of conductive filter plates faces the air outlet end of the anode plate directly in front of it; each conductive filter plate is provided with a plurality of air outlet holes; each cathode wire group includes a plurality of first cathode wires; a plurality of first cathode wires of one cathode wire group are arranged between any two adjacent anode plate rows on the left and right in the plurality of anode plate rows; each cathode wire group further includes one or two second cathode wires; one or two second cathode wires of one cathode wire group are arranged between any two adjacent conductive filter plates on the left and right in the row of conductive filter plates; the discharge property of the second cathode wire is significantly weaker than that of the first cathode wire.

[0008] Preferably, each conductive filter plate is provided with a plurality of circular air outlet holes or elliptical air outlet holes with an equivalent diameter not greater than 10 mm, or is provided with a plurality of rectangular air outlet holes with an equivalent diameter between 30 mm and 90 mm, and a square raised block with its upper edge adjoining its upper edge is arranged obliquely downward downstream of each rectangular air outlet hole; the first cathode wire has a tip discharge structure, while the second cathode wire does not have a tip discharge structure and its appearance is relatively smooth; the cross-sectional area of the main body of the first cathode wire is significantly smaller than that of the second cathode wire.

[0009] Preferably, the porosity of each conductive filter plate is between 15% and 65%; each conductive filter plate includes a back filter plate, a left filter plate and a right filter plate symmetrical thereto; the back filter plate, the left filter plate and the right filter plate are respectively provided with a plurality of the circular air outlet holes or elliptical air outlet holes, or are respectively provided with a plurality of the rectangular air outlet holes, and the square raised block with its upper edge adjoining its upper edge is arranged obliquely downward downstream of each rectangular air outlet hole.

[0010] Preferably, the back filter plate, the left filter plate, and the right filter plate are respectively fixedly connected to the upper ends of several square raised blocks, or the back filter plate, the left filter plate, and the right filter plate are respectively integrated with several square raised blocks; the angle between each square raised block and the vertical plane is between 20° and 30°; the length of the square raised block is slightly less than the length of the rectangular air outlet, and its width is slightly less than the width of the rectangular air outlet.

[0011] Preferably, the rear ends of the left filter plate and the right filter plate are respectively fixedly connected to the left and right ends of the back filter plate; the angles between the left filter plate and the right filter plate and the back filter plate are both between 100° and 120°.

[0012] Preferably, each conductive filter plate further includes a horizontally arranged arcuate upper connecting plate and a horizontally arranged arcuate lower connecting plate, and an auxiliary dust collecting plate vertically arranged between the left filter plate and the right filter plate. Among them, the setting direction of the auxiliary dust collecting plate is parallel to the setting direction of the anode plate directly in front of it; the upper front ends of the left filter plate and the right filter plate are respectively fixedly connected to the left and right ends of the arcuate upper connecting plate, and the lower front ends of the left filter plate and the right filter plate are respectively fixedly connected to the left and right ends of the arcuate lower connecting plate; the air inlet end of the auxiliary dust collecting plate is fixedly connected to the air outlet end of the anode plate directly in front of it, or the upper and lower parts of the air inlet end of the auxiliary dust collecting plate are respectively fixedly connected to the middle parts of the arcuate upper connecting plate and the arcuate lower connecting plate, and the middle parts of the arcuate upper connecting plate and the arcuate lower connecting plate are respectively fixedly connected to the upper and lower parts of the air outlet end of the anode plate directly in front of it; the air outlet end of the auxiliary dust collecting plate is fixedly connected to the back filter plate.

[0013] Preferably, at least in the one electric field, another row of conductive filter plates is further arranged behind the several cathode wire groups; the air inlets of each conductive filter plate in the another row of conductive filter plates face the second cathode wire directly in front of it.

[0014] Preferably, the distance between the last second cathode wire of each cathode wire group and the conductive filter plate in the another row of conductive filter plates directly behind it is slightly greater than or equal to the distance between it and the two conductive filter plates in the row of conductive filter plates on its left and right sides.

[0015] Preferably, the upper ends of each conductive filter plate in the another row of conductive filter plates are welded to the horizontally arranged angle steel; the left and right ends of the horizontally arranged angle steel are respectively fixedly connected to the left and right side plates of the housing.

[0016] Preferably, the other row of conductive filter plates is equipped with a set of side vibration cleaning devices for filter plates; the set of side vibration cleaning devices for filter plates includes a vibration shaft and a number of integral hammers, and a number of filter plate vibration anvil blocks respectively welded on the rear parts of each conductive filter plate in the other row of conductive filter plates.

[0017] In each electric field of an efficient conductive filter plate electrostatic precipitator provided by the present invention, most of the charged dust escaping from the surface of the anode plate at the rear of the electric field, and most of the secondary dust raising generated when the anode plate is vibrated for cleaning, can enter a row of conductive filter plates arranged downstream of a number of anode plate rows along with the air flow, and be effectively captured under the dual action of electrostatic adsorption and interception filtration. In addition, most of the secondary dust raising generated when each conductive filter plate in the row of conductive filter plates is vibrated for cleaning can also be effectively captured under the dual action of electrostatic adsorption and interception filtration. Since one or two second cathode wires of the cathode wire group are arranged between any two adjacent left and right conductive filter plates in the row of conductive filter plates, most of the dust escaping from the air outlet holes of the above-mentioned conductive filter plates, a small part of the charged dust escaping from the surface of the anode plate at the rear of the electric field, and the charged dust in the flue gas relatively far from the surface of the anode plate at the rear of the electric field, and a small part of the secondary dust raising generated when the above-mentioned conductive filter plates and the anode plates upstream thereof are vibrated for cleaning, after entering the channel between any two adjacent left and right conductive filter plates in the row of conductive filter plates, can move forward along with the air flow while continuing to be charged or starting to be charged; at the same time, the negatively charged dust and positively charged dust in the above-mentioned channel migrate towards the above-mentioned conductive filter plates and the above-mentioned second cathode wires respectively under the action of the electric field force, and a part of the negatively charged dust will accumulate on the above-mentioned conductive filter plates - naturally, a part of the positively charged dust will accumulate on the above-mentioned second cathode wires, thus significantly improving the dust removal efficiency of this conductive filter plate electrostatic precipitator. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an efficient conductive filter plate electrostatic precipitator provided by the present invention.

[0019] Figure 2 is Figure 1 a partial enlarged view of part Ⅰ in

[0020] Figure 3 a schematic structural diagram when a left filter plate (1) in the present invention is fixedly connected to a number of square raised blocks (1). Detailed Embodiment

[0021] In order to make the objectives and technical solutions of the present invention clearer, the following further describes the content of the present invention with reference to the drawings and embodiments.

[0022] As Figures 1 to 3 shown, an efficient conductive filter plate electrostatic precipitator provided by the present invention includes an intake smoke box 10, a housing 20, a first electric field, a second electric field, and an outlet smoke box 90.

[0023] Both the first electric field and the second electric field include nine anode plate rows 40 and eight cathode wire groups 30. A row of conductive filter plates is arranged downstream of the nine anode plate rows 40, and another row of conductive filter plates is arranged behind the eight cathode wire groups 30. The nine anode plate rows 40 and the eight cathode wire groups 30 are parallel and alternately arranged; the distance B between any two adjacent left and right anode plate rows 40 among the nine anode plate rows 40 is 450 mm. In order to timely vibrate and clean the anode-cathode system of each electric field and the said another row of conductive filter plates, each electric field is equipped with a set of anode side vibration cleaning devices 50 provided with nine integral hammers (one), and a set of cathode side vibration cleaning devices (note: Figure 1 not shown in the figure) located above the anode side vibration cleaning devices 50 and provided with eight integral hammers (two), while another row of conductive filter plates arranged behind the eight cathode wire groups 30 is equipped with a set of filter plate side vibration cleaning devices 80.

[0024] Each set of filter plate side vibration cleaning devices 80 includes a vibration shaft and eight integral hammers (three), and eight filter plate vibration anvils 77 respectively welded on the rear parts of each conductive filter plate (two) 70 in the said another row of conductive filter plates. Obviously, the mass of the integral hammer (one) and the mass of the integral hammer (two) are both significantly greater than the mass of the integral hammer (three) (unit: kg). By sequentially hitting each filter plate vibration anvil 77 with each integral hammer (three) in the filter plate side vibration cleaning devices 80, most of the dust accumulated on the conductive filter plate (two) 70 can be removed.

[0025] Each anode plate row 40 includes eight anode plates 41, an anode vibration rod 42, and an anode vibration anvil. Each cathode wire group 30 includes sixteen first cathode wires 31 and one second cathode wire 32. Among any two adjacent left and right anode plate rows 40 among the nine anode plate rows 40, sixteen first cathode wires 31 of a cathode wire group 30 are arranged; among any two adjacent left and right conductive filter plates (one) 60 in the said row of conductive filter plates, one second cathode wire 32 of a cathode wire group 30 is arranged. The distance between the second cathode wire 32 and the two conductive filter plates (one) 60 on its left and right sides is slightly smaller than the distance between the first cathode wire 31 and the two anode plate rows 40 on its left and right sides.

[0026] The cross-section of the main body of the first cathode wire 31 described above is circular (note: it can be changed to elliptical or other shapes), while the cross-section of the second cathode wire 32 is elliptical (note: it can be changed to circular or other shapes), and the major axis of the ellipse is located on the symmetry center line of the cathode wire group 30; also, since the first cathode wire 31 described above has a needle-shaped tip discharge structure, while the second cathode wire 32 does not have a tip discharge structure and its appearance is relatively smooth; in addition, the cross-sectional area of the main body of the first cathode wire 31 is significantly smaller than the cross-sectional area of the second cathode wire 32, so the discharge performance of the second cathode wire 32 is significantly weaker than that of the first cathode wire 31.

[0027] The row of conductive filter plates includes nine conductive filter plates (1) 60 provided downstream of the nine anode plate rows 40. The air inlets of each conductive filter plate (1) 60 face the outlet end of the anode plate 41 directly in front of it. Each conductive filter plate (1) 60 is provided with a plurality of rectangular air outlet holes (1), and its opening ratio is 47% (note: it can be changed to other values between 15% and 65%, such as 20% or 60%). The length and width of the rectangular air outlet holes (1) are 43 mm and 45 mm respectively, and its equivalent diameter is 44 mm; however, the equivalent diameter can also be changed to other values between 30 mm and 90 mm, such as 35 mm or 80 mm, by changing its length and / or width. A square raised block (1) 64 is provided downstream of each rectangular air outlet hole (1) in a downwardly inclined manner; the upper edge of each rectangular air outlet hole (1) is adjacent to the upper edge of a square raised block (1) 64.

[0028] Each conductive filter plate (1) 60 includes a back filter plate (1) 65, a left filter plate (1) 62, a right filter plate (1) 66 symmetrical to the left filter plate (1) 62, and a horizontally arranged arched upper connecting plate (1) (note: Figure 2(not shown in the figure), a horizontally arranged bow-shaped lower connecting plate (1) 61, and a vertically arranged auxiliary dust collecting plate (1) 63. The back filter plate (1) 65, the left filter plate (1) 62, and the right filter plate (1) 66 are respectively provided with a plurality of the rectangular air outlet holes (1), and their opening ratios are all equal to that of the conductive filter plate (1) 60. The back filter plate (1) 65, the left filter plate (1) 62, and the right filter plate (1) 66 are respectively fixedly connected to the upper ends of a plurality of square raised blocks (1) 64 which are arranged obliquely downward downstream of their respective plurality of rectangular air outlet holes (1), and the upper edge of each rectangular air outlet hole (1) is adjacent to the upper edge of a square raised block (1) 64 located downstream of it. The length of the square raised block (1) 64 is slightly less than the length of the rectangular air outlet hole (1), and the width of the square raised block (1) 64 is slightly less than the width of the rectangular air outlet hole (1). The angle between each square raised block (1) 64 and the vertical plane is a certain fixed value between 20° and 30°, such as 25°.

[0029] Of course, it is also possible to directly punch a plurality of the rectangular air outlet holes (1) in a steel plate by a machine, and make its opening ratio be a value between 15% and 65%, such as 20% or 60%. Moreover, when punching, it is required that after punching a plurality of the rectangular air outlet holes (1), a plurality of square raised blocks (1) 64 are formed, and each square raised block (1) 64 only has its upper edge connected to the main body of the steel plate; the angle between each square raised block (1) 64 and the main body of the steel plate is a certain value between 20° and 30°, such as 25°, and make the length and width of the square raised block (1) 64 be slightly less than the length and width of the rectangular air outlet hole (1) respectively, then the left filter plate (1) 62, or the right filter plate (1) 66, or the back filter plate (1) 65 connected integrally with a plurality of square raised blocks (1) 64 can be obtained.

[0030] Connect the back filter plate (1) 65, the left filter plate (1) 62, and the right filter plate (1) 66 to a plurality of square raised blocks (1) 64 respectively in the above manner, either fixedly connected or integrally formed, which can not only avoid the dust accumulated on its surface from mixing into the dust-containing air flow due to the occurrence of turbulence near the surface of the back filter plate (1), or the left filter plate (1) 62, or the right filter plate (1) 66, but also intercept a part of the dust in the above-mentioned dust-containing air flow by using the above-mentioned square raised blocks (1) 64 when the dust-containing air flow passes through the rectangular air outlet holes (1).

[0031] The front upper ends of the left filter plate (1) 62 and the right filter plate (1) 66 are respectively fixedly connected to the left and right ends of the arcuate upper connecting plate (1), while the front lower ends of the left filter plate (1) 62 and the right filter plate (1) 66 are respectively fixedly connected to the left and right ends of the arcuate lower connecting plate (1) 61. The rear ends of the left filter plate (1) 62 and the right filter plate (1) 66 are respectively fixedly connected to the left and right ends of the back filter plate (1) 65; the included angles α between the left filter plate (1) 62 and the right filter plate (1) 66 and the back filter plate (1) 65 are both values between 100° and 120°, such as 106° or 115°, which is beneficial for the left filter plate (1) 62 and the right filter plate (1) 66 to capture the charged dust entering the conductive filter plate (1) 60.

[0032] The auxiliary dust collecting plate (1) 63 is vertically arranged between the left filter plate (1) 62 and the right filter plate (1) 66, and its arrangement direction is parallel to the arrangement direction of the anode plate 41 directly in front of it. Through a number of bolts, spring washers and nuts, the upper and lower parts of the air inlet end of the auxiliary dust collecting plate (1) 63 are respectively fixedly connected to the middle part of the arcuate upper connecting plate (1) and the middle part of the arcuate lower connecting plate (1) 61, and the middle parts of the arcuate upper connecting plate (1) and the arcuate lower connecting plate (1) 61 are respectively fixedly connected to the upper and lower parts of the air outlet end of the anode plate 41 directly in front of it; while the air outlet end of the auxiliary dust collecting plate (1) 63 is fixedly connected to the back filter plate (1) 65. Therefore, by the integral hammers (1) in the anode side vibration cleaning device 50 hitting each anode vibration anvil in sequence, most of the dust accumulated on the anode plate row 40 and the conductive filter plate (1) 60 behind it can be removed simultaneously. Of course, the air inlet end of the auxiliary dust collecting plate (1) 63 can also be directly fixedly connected to the air outlet end of the anode plate 41 directly in front of it.

[0033] The other row of conductive filter plates includes eight conductive filter plates (2) 70 arranged behind the eight cathode wire groups 30. The upper end of each conductive filter plate (2) 70 is welded to the horizontal angle steel; the left and right ends of the horizontal angle steel are respectively fixedly connected to the left and right side plates of the housing 20 (note: Figure 1 and Figure 2 not shown in the figure). The air inlet of each conductive filter plate (2) 70 faces the second cathode wire 32 directly in front of it, so as to effectively capture the charged dust escaping from the channel between any two adjacent left and right conductive filter plates (1) 60 in the row of conductive filter plates.

[0034] Each conductive filter plate (II) 70 is provided with a plurality of rectangular air outlet holes (II), and the porosity thereof is equal to that of the conductive filter plate (I) 60. The length and width of the rectangular air outlet holes (II) are respectively the same as those of the rectangular air outlet holes (I). Downwardly inclined downstream of each of the rectangular air outlet holes (II) is provided a square raised block (II) 74 whose upper edge is contiguous with its upper edge. The length and width of the square raised block (II) 74 are respectively equal to those of the square raised block (I) 64.

[0035] Each conductive filter plate (II) 70 includes a back filter plate (II) 75, a left filter plate (II) 72, a right filter plate (II) 76 symmetrical to the left filter plate (II) 72, a horizontally arranged arcuate upper connecting plate (II) (note: Figure 2 not shown in the figure), a horizontally arranged arcuate lower connecting plate (II) 71, and a vertically arranged auxiliary dust collecting plate (II) 73. The back filter plate (II) 75, the left filter plate (II) 72, and the right filter plate (II) 76 are also respectively provided with a number of rectangular air outlet holes (II), and the porosity thereof is equal to that of the conductive filter plate (II) 70. The back filter plate (II) 75, the left filter plate (II) 72, and the right filter plate (II) 76 are respectively fixedly connected to the upper ends of a number of square raised blocks (II) 74 which are downwardly inclined downstream of their respective a number of rectangular air outlet holes (II), or are respectively integrally formed with a number of square raised blocks (II) 74 which are downwardly inclined downstream of their respective a number of rectangular air outlet holes (II), and the upper edge of each of the rectangular air outlet holes (II) is contiguous with the upper edge of a square raised block (II) 74 located downstream thereof. The angle between each square raised block (II) 74 and the vertical plane is equal to the angle between the square raised block (I) 64 and the vertical plane.

[0036] By fixedly connecting or integrally forming the back filter plate (II) 75, the left filter plate (II) 72, and the right filter plate (II) 76 with a number of square raised blocks (II) 74 in the above manner, it is possible to avoid the dust adsorbed thereon from mixing into the dust-containing air flow due to the occurrence of turbulence near the surface of the back filter plate (II), the left filter plate (II), or the right filter plate (II), and it is also possible to intercept a part of the dust in the dust-containing air flow by using the above square raised blocks (II) 74 when the dust-containing air flow passes through the rectangular air outlet holes (II).

[0037] The front upper ends of the left filter plate (II) 72 and the right filter plate (II) 76 are respectively fixedly connected to the left and right ends of the arcuate upper connecting plate (II), while the front lower ends of the left filter plate (II) 72 and the right filter plate (II) 76 are respectively fixedly connected to the left and right ends of the arcuate lower connecting plate (II) 71. The rear ends of the left filter plate (II) 72 and the right filter plate (II) 76 are respectively fixedly connected to the left and right ends of the back filter plate (I) 75; the included angles β between the left filter plate (II) 72 and the right filter plate (II) 76 and the back filter plate (II) 75 are also both values between 100° and 120°, such as 106° or 115°, so as to facilitate the left filter plate (II) 72 and the right filter plate (II) 76 to capture the charged dust entering the conductive filter plate (II) 70.

[0038] The auxiliary dust collecting plate (II) 73 is vertically arranged between the left filter plate (II) 72 and the right filter plate (II) 76, and its arrangement direction is parallel to the arrangement direction of the cathode wire group 30 located directly in front of it. Through a number of bolts, spring washers and nuts, the upper and lower parts of the intake end of the auxiliary dust collecting plate (II) 73 are respectively fixedly connected to the middle part of the arcuate upper connecting plate (II) and the middle part of the arcuate lower connecting plate (II) 71, while the outlet end of the auxiliary dust collecting plate (II) 73 is fixedly connected to the back filter plate (II) 75.

[0039] Since the cross-section of the second cathode wire 32 in this embodiment is elliptical, and the major axis of the ellipse is located on the symmetry center line of the cathode wire group 30, the distance between the second cathode wire 32 and the conductive filter plate (II) 70 located directly behind it should be slightly greater than the distance between it and the two conductive filter plates (I) 60 located on its left and right sides, so as not to affect the operating voltage of the electric field. However, when the cross-section of the second cathode wire 32 is changed to circular, the distance between the second cathode wire 32 and the conductive filter plate (II) 70 located directly behind it only needs to be equal to the distance between it and the two conductive filter plates (I) 60 located on its left and right sides, so as to reduce the length of the housing 20. The second cathode wire 32 is fixedly connected to the cathode frame in front of it, which is equipped with a plurality of first cathode wires 31, through a number of small cross bars. Please refer to Figure 2 This installation method of fixedly connecting the second cathode wire 32 to the cathode frame equipped with a plurality of first cathode wires 31 is applicable to both newly built electrostatic precipitators and is very convenient for retrofitting old electrostatic precipitators.

[0040] In addition, if the distance between the second cathode wire 32 and the conductive filter plate (II) 70 located directly behind it is significantly greater than the distance between the first cathode wire 31 and the two anode plate rows 40 located on its left and right sides (note: 225 mm), then another second cathode wire 32 can be added directly behind the second cathode wire 32, and the distance between the other second cathode wire 32 and the conductive filter plate (II) 70 located directly behind it is slightly greater than the distance between it and the two conductive filter plates (I) 60 located on its left and right sides; however, the distance between these two second cathode wires 32 can be less than 100 mm. Of course, the distances between the second cathode wire 32 and the other second cathode wire 32 and the two conductive filter plates (I) 60 located on their left and right sides are both slightly less than the distance between the first cathode wire 31 and the two anode plate rows 40 located on its left and right sides.

[0041] Four additional points are described below:

[0042] First, in each of the above electric fields, most of the charged dust escaping from the surface of the anode plate 41 at the rear of the electric field and most of the secondary dust generated when the anode plate 41 is vibrated and cleaned are effectively trapped by the row of conductive filter plates after entering the row of conductive filter plates provided downstream of the nine anode plate rows 40 along with the air flow. Since one or two second cathode wires 32 of a cathode wire group 30 are provided between any two adjacent conductive filter plates (I) 60 on the left and right in the row of conductive filter plates, most of the dust escaping from the air outlet holes of the conductive filter plates (I) 60 along with the air flow, a small part of the charged dust escaping from the surface of the anode plate 41 at the rear of the electric field, and the charged dust in the flue gas that is relatively far from the surface of the anode plate 41 at the rear of the electric field, as well as a small part of the secondary dust generated when the conductive filter plates (I) 60 and the anode plate 41 located upstream of them are vibrated and cleaned, can continue to be charged or start to be charged while moving forward with the air flow after entering the channel between any two adjacent conductive filter plates (I) 60 on the left and right; at the same time, the negatively charged dust in the above channel migrates towards the conductive filter plates (I) 60 and the second cathode wires 32 under the action of the electric field force, and a part of the negatively charged dust will accumulate on them - that is, on the left filter plate (I) 62, the right filter plate (66), and the square protrusion (I) 64 facing the second cathode wire 32 - naturally, a part of the positively charged dust will also accumulate on the second cathode wires 32, thus significantly improving the dust removal efficiency of this conductive filter plate electrostatic precipitator.

[0043] In addition, since a second cathode wire 32 is disposed directly in front of each of the conductive filter plates (two) 70 in the other row of conductive filter plates, and the distance between them is relatively small, the charge amount of the charged dust when advancing to the air inlet of the conductive filter plate (two) 70 along with the air flow can be significantly increased, thereby significantly enhancing the trapping efficiency of the other row of conductive filter plates for the charged dust escaping from the channels between any two adjacent conductive filter plates (one) 60 on the left and right along with the air flow.

[0044] Second, in each of the above-mentioned electric fields, although the distance between each second cathode wire 32 of each cathode wire group 30 and the two conductive filter plates (one) 60 located on its left and right sides, and the distance between the last second cathode wire 32 of each cathode wire group 30 and the conductive filter plate (two) 70 located directly behind it are slightly smaller than the distance between each first cathode wire 31 and the two anode plate rows 40 located on its left and right sides, since the discharge property of the second cathode wire 32 is significantly weaker than that of the first cathode wire 31, it will not cause the operating voltage of each of the above-mentioned electric fields to decrease. Naturally, setting the second cathode wire 32 in this way will neither reduce the trapping efficiency of the anode plate row 40 for the charged dust in the flue gas flowing by its side, nor reduce the trapping efficiency of the conductive filter plates (one) 60 and the conductive filter plates (two) 70 for the charged dust in the flue gas entering them, and even less reduce the trapping efficiency of the left filter plate (one) 62 and the right filter plate 66 of the conductive filter plate (one), as well as the square projection block (one) 64 facing the second cathode wire 32, for the negatively charged dust advancing along with the air flow in the channels between any two adjacent conductive filter plates (one) 60 in the row of conductive filter plates.

[0045] Third, if the dust concentration of the inlet flue gas of the electrostatic precipitator is relatively high, after appropriately extending the length of the housing 20, we can add the first electric field and / or the second electric field, and set several conductive filter plates (one) 60 downstream of the anode plate row of the first electric field and / or the second electric field. On the contrary, if the dust concentration of the inlet flue gas of the electrostatic precipitator is relatively low, we can cancel several conductive filter plates (two) 70 and the filter plate side vibration cleaning device 80 provided downstream of the anode plate row of the first electric field and / or the second electric field, and correspondingly shorten the length of the housing 20 a little.

[0046] Fourthly, we can first cancel all the square raised blocks (I) 64 on each conductive filter plate (I) 60 and all the square raised blocks (II) 74 on each conductive filter plate (II) 70, and cancel all the rectangular air outlets (I) on each conductive filter plate (I) 60 and all the rectangular air outlets (II) on each conductive filter plate (II) 70. Then, appropriately form a plurality of circular air outlets or oval air outlets with an equivalent diameter not greater than 10 mm (such as 3 mm or 8 mm) thereon, and make their porosity be a value between 15% and 65%, such as 20% or 60%, so as to facilitate the manufacture of these two types of conductive filter plates.

[0047] The conventional methods adopted in the present invention are known to those skilled in the art. Its principle and structure can be learned by those skilled in the art through relevant technical books or obtained through conventional experimental methods. For example, the installation and use of the anode plate row and the cathode wire group to form an electric field are all existing methods or technologies, and the present invention will not elaborate further.

[0048] The above description is only a preferred embodiment of the present invention, and does not impose any limitation on the protection scope of the present invention. Therefore, any minor modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. An efficient conductive filter plate electrostatic precipitator, comprising a housing and more than two electric fields; each of the electric fields includes a plurality of cathode wire groups and a plurality of anode plate rows; a row of conductive filter plates is arranged downstream of the plurality of anode plate rows; the air inlet of each conductive filter plate in the row of conductive filter plates faces the air outlet end of the anode plate directly in front of it; each conductive filter plate is provided with a plurality of air outlet holes; each cathode wire group includes a plurality of first cathode wires; a plurality of first cathode wires of one cathode wire group are arranged between any two adjacent anode plate rows on the left and right among the plurality of anode plate rows, and the characteristics are as follows: Each of the cathode wire groups further includes one or two second cathode wires; one or two second cathode wires of one cathode wire group are disposed between any two adjacent left and right conductive filter plates in the row of conductive filter plates; the discharge property of the second cathode wire is significantly weaker than that of the first cathode wire so as not to cause a reduction in the operating voltage of each electric field; Each of the conductive filter plates is provided with a plurality of circular air holes or elliptical air holes with an equivalent diameter not greater than 10 mm, or is provided with a plurality of rectangular air holes with an equivalent diameter between 30 mm and 90 mm, and a square raised block with its upper edge in contact with its upper edge is disposed obliquely downward downstream of each rectangular air hole.

2. The efficient conductive filter plate electrostatic precipitator according to claim 1, and the characteristics are as follows: The first cathode wire has a tip discharge structure, while the second cathode wire does not have a tip discharge structure and its outer surface is relatively smooth; the cross-sectional area of the main body of the first cathode wire is significantly smaller than the cross-sectional area of the second cathode wire.

3. The efficient conductive filter plate electrostatic precipitator according to claim 2, and the characteristics are as follows: The porosity of each of the conductive filter plates is between 15% and 65%; each of the conductive filter plates includes a back filter plate, a left filter plate and a right filter plate symmetrical thereto; the back filter plate, the left filter plate and the right filter plate are respectively provided with a plurality of the circular air holes or elliptical air holes, or are respectively provided with a plurality of the rectangular air holes, and a square raised block with its upper edge in contact with its upper edge is disposed obliquely downward downstream of each of the rectangular air holes.

4. The efficient conductive filter plate electrostatic precipitator according to claim 3, and the characteristics are as follows: The back filter plate, the left filter plate and the right filter plate are respectively fixedly connected to the upper ends of a plurality of the square raised blocks, or the back filter plate, the left filter plate and the right filter plate are respectively integrated with a plurality of the square raised blocks; the angle between each square raised block and the vertical plane is between 20° and 30°; the length of the square raised block is slightly smaller than the length of the rectangular air hole, and its width is slightly smaller than the width of the rectangular air hole.

5. The efficient conductive filter plate electrostatic precipitator according to claim 3, and the characteristics are as follows: The rear ends of the left filter plate and the right filter plate are respectively fixedly connected to the left and right ends of the back filter plate; the angles between the left filter plate and the right filter plate and the back filter plate are both between 100° and 120°.

6. The efficient conductive filter plate electrostatic precipitator according to claim 3, and the characteristics are as follows: Each of the conductive filter plates further includes a horizontally disposed arcuate upper connecting plate, a horizontally disposed arcuate lower connecting plate, and an auxiliary dust collecting plate vertically disposed between the left filter plate and the right filter plate. Among them, the setting direction of the auxiliary dust collecting plate is parallel to the setting direction of the anode plate directly in front of it; the front upper ends of the left filter plate and the right filter plate are respectively fixedly connected to the left and right ends of the arcuate upper connecting plate, and the front lower ends of the left filter plate and the right filter plate are respectively fixedly connected to the left and right ends of the arcuate lower connecting plate; the air inlet end of the auxiliary dust collecting plate is fixedly connected to the air outlet end of the anode plate directly in front of it, or the upper and lower parts of the air inlet end of the auxiliary dust collecting plate are respectively fixedly connected to the middle part of the arcuate upper connecting plate and the middle part of the arcuate lower connecting plate, and the middle parts of the arcuate upper connecting plate and the arcuate lower connecting plate are respectively fixedly connected to the upper and lower parts of the air outlet end of the anode plate directly in front of it; the air outlet end of the auxiliary dust collecting plate is fixedly connected to the back filter plate.

7. The efficient conductive filter plate electrostatic precipitator according to any one of claims 1 to 6, and the characteristics are as follows: At least in the one electric field, another row of conductive filter plates is further provided behind the several cathode wire groups; the air inlet of each conductive filter plate in the another row of conductive filter plates faces the second cathode wire directly in front of it.

8. The efficient conductive filter plate electrostatic precipitator according to claim 7, and the characteristics are as follows: The distance between the last second cathode wire of each cathode wire group and the conductive filter plate in the another row of conductive filter plates directly behind it is slightly greater than or equal to the distance between it and the two conductive filter plates in the row of conductive filter plates on its left and right sides.

9. The efficient conductive filter plate electrostatic precipitator according to claim 7, and the characteristics are as follows: The upper end of each conductive filter plate in the another row of conductive filter plates is welded to the horizontally disposed angle steel; the left and right ends of the horizontally disposed angle steel are respectively fixedly connected to the left and right side plates of the housing.

10. The efficient conductive filter plate electrostatic precipitator according to claim 7, and the characteristics are as follows: The another row of conductive filter plates is equipped with a set of side vibration cleaning device for filter plates; the set of side vibration cleaning device for filter plates includes a vibration shaft, several integral hammers, and several filter plate vibration anvils respectively welded on the rear parts of the conductive filter plates in the another row of conductive filter plates.

Images