CN114345552B - A high-efficiency conductive filter plate electrostatic precipitator - Google Patents
A high-efficiency conductive filter plate electrostatic precipitator Download PDFInfo
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- CN114345552B CN114345552B CN202110724490.XA CN202110724490A CN114345552B CN 114345552 B CN114345552 B CN 114345552B CN 202110724490 A CN202110724490 A CN 202110724490A CN 114345552 B CN114345552 B CN 114345552B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
本发明所提供的一种高效导电滤板电除尘器包括壳体和两个以上的电场；所述每个电场都包括若干个阴极线组和若干件阳极板排排；在所述若干件阳极板排下游设置有一排设有多个出气孔的导电滤板；在所述若干件阳极板排中的任意左右相邻的两件阳极板排之间皆设置有所述一个阴极线组的多根第一阴极线；在所述一排导电滤板中的任意左右相邻的两件导电滤板之间皆设置有所述一个阴极线组的一根或者两根第二阴极线；所述第二阴极线的放电性显著地弱于所述第一阴极线的放电性。在任意左右相邻的两件导电滤板之间的通道内，随着气流前进的粉尘可以继续荷电或者开始荷电；与此同时，荷负电粉尘向着上述导电滤板迁移，而且有一部分荷负电粉尘将积附在其上。
The high-efficiency conductive filter plate electrostatic precipitator provided by the present invention includes a shell and more than two electric fields; each electric field includes a plurality of cathode wire groups and a plurality of anode plate rows; a row of conductive filter plates with a plurality of air outlets is arranged downstream of the plurality of anode plate rows; a plurality of first cathode wires of the cathode wire group are arranged between any two adjacent anode plate rows in the plurality of anode plate rows; one or two second cathode wires of the cathode wire group are arranged between any two adjacent 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. In the channel between any two adjacent conductive filter plates, the dust moving forward with the airflow can continue to be charged or begin to be charged; at the same time, the negatively charged dust migrates toward the conductive filter plate, and a part of the negatively charged dust will be deposited on it.
Description
Technical Field
The invention relates to the technical field of electric dust removal, in particular to an efficient conductive filter plate electric dust remover.
Background
In the high-voltage electric field of the electric dust collector, a large amount of electrons and positive ions are generated by corona discharge, and the electrons and the positive ions collide with dust in the flue gas in the process of moving towards different poles to form negatively charged dust or positively charged dust, and then the negatively charged dust and the positively charged dust respectively tend to the anode and the cathode under the action of an electric field force, and most of the negatively charged dust and the positively charged dust are respectively accumulated on the anode and the cathode, so that the purpose of purifying the flue gas is realized.
When the dust-containing flue gas travels to the section of any electric field inlet in the electric dust collector, the dust concentration distribution at the inlets of each electric field channel is approximately uniform, but when the dust-containing flue gas travels to the end section of each electric field channel, the dust concentration of the flue gas close to the surface of the anode plate is higher, and the dust concentration of the flue gas far from the surface of the anode plate is lower. Some people have arranged a row of conductive filter plates provided with a plurality of air outlet holes at the downstream of the anode plate row of each electric field of the electric dust collector. Because the air inlets of the conductive filter plates face the air outlet end of the anode plate positioned right in front of the conductive filter plates, most of charged dust escaping along the surface of the anode plate at the rear part of the electric field and most of secondary dust generated when the anode plate is subjected to vibration dust removal can enter the conductive filter plates along with air flow and can be effectively trapped under the dual effects of electrostatic adsorption and interception filtration, so that the dust concentration of the outlet flue gas of the electric dust remover can be obviously reduced.
The dust entering along with the air flow through the air inlet of the conductive filter plate can escape to the outlet end of the next electric field or the electric dust collector along with the air flow from the air outlet of the conductive filter plate, and in addition, a small part of secondary dust generated when the conductive filter plate and the anode plate positioned on the upstream of the conductive filter plate are subjected to vibration dust cleaning can escape to the outlet end of the next electric field or the electric dust collector along with the air flow from the passage between the left conductive filter plate and the right conductive filter plate in the conductive filter plate, so that the concentration of the dust at the outlet of the electric dust collector of the conventional conductive filter plate is still a little high, namely the dust collection efficiency of the conventional electric dust collector is still to be improved naturally. Therefore, how to significantly improve the collection efficiency of the conductive filter plate against 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 located upstream thereof are subjected to rapping ash removal is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a high-efficiency conductive filter plate electric dust collector, which aims to remarkably improve the collection efficiency of charged dust escaping from a conductive filter plate along the surface of an anode plate at the rear part of an electric field and secondary dust generated when the conductive filter plate and the anode plate positioned at the upstream of the conductive filter plate are subjected to vibration dust removal, so that the dust collection efficiency of the conductive filter plate electric dust collector is remarkably improved.
The invention adopts the following technical scheme:
The electric dust remover comprises a shell and more than two electric fields, each electric field comprises a plurality of cathode wire groups and a plurality of anode plate rows, a row of conductive filter plates are arranged at the downstream of each anode plate row, air inlets of each conductive filter plate in the row face to an air outlet end of one anode plate positioned right in front of the conductive filter plates, each conductive filter plate is provided with a plurality of air outlets, each cathode wire group comprises a plurality of first cathode wires, a plurality of first cathode wires of one cathode wire group are arranged between any left anode plate row and any right anode plate row in the anode plate rows, each cathode wire group further comprises one or two second cathode wires, one or two second cathode wires of the cathode wire groups are arranged between any left and right adjacent anode plates in the row of conductive filter plates, and the discharge property of the second cathode wires is obviously weaker than that of the first cathode wires.
Preferably, each conductive filter plate is provided with a plurality of round air outlet holes or oval air outlet holes with equivalent diameters not larger than 10mm, or is provided with a plurality of rectangular air outlet holes with equivalent diameters between 30mm and 90mm, a square protruding block with an upper edge bordering the upper edge is downwards and obliquely arranged at the downstream of each rectangular air outlet hole, the first cathode line is provided with a tip discharge structure, the second cathode line is not provided with a tip discharge structure, the outer surface of the second cathode line is smooth, and the cross section area of the main body of the first cathode line is obviously smaller than that of the second cathode line.
The multi-layer filter plate comprises a plurality of rectangular air outlet holes, wherein the opening ratio of each conductive filter plate is 15-65%, each conductive filter plate comprises a back filter plate, a left filter plate and a right filter plate which are symmetrical to the back filter plate, the left filter plate and the right filter plate are respectively provided with a plurality of round air outlet holes or oval air outlet holes, or a plurality of rectangular air outlet holes, and a square protruding block with the upper edge adjacent to the upper edge of each rectangular air outlet hole is obliquely arranged at the downstream of each rectangular air outlet hole.
Preferably, the back filter plate, the left filter plate and the right filter plate are respectively fixedly connected with the upper ends of the square protruding blocks, or the back filter plate, the left filter plate and the right filter plate are respectively connected with the square protruding blocks into a whole, the included angle between each square protruding block and the vertical surface is 20-30 degrees, the length of each square protruding block is slightly smaller than the length of the rectangular air outlet hole, and the width of each square protruding block is slightly smaller than the width of the rectangular air outlet hole.
Preferably, the rear ends of the left filter plate and the right filter plate are fixedly connected with the left end and the right end of the back filter plate respectively, and the included angles between the left filter plate and the back filter plate and between the right filter plate and the back filter plate are all 100-120 degrees.
Preferably, each conductive filter plate further comprises a horizontally arranged arched upper connecting plate, a horizontally arranged arched lower connecting plate and an auxiliary dust collecting plate vertically arranged between the left filter plate and the right filter plate, wherein the arrangement direction of the auxiliary dust collecting plate is parallel to the arrangement direction of the anode plate positioned right in front of the auxiliary dust collecting plate, the front upper end of the left filter plate and the front upper end of the right filter plate are fixedly connected with the left end and the right end of the arched upper connecting plate respectively, the front lower end of the left filter plate and the front lower end of the right filter plate are fixedly connected with the left end and the right end of the arched lower connecting plate respectively, the air inlet end of the auxiliary dust collecting plate is fixedly connected with the air outlet end of the anode plate positioned right in front of the auxiliary dust collecting plate, or the upper part and the lower part of the air inlet end of the auxiliary dust collecting plate are fixedly connected with the middle part of the arched upper connecting plate and the middle part of the arched lower connecting plate respectively, the middle part of the arched upper connecting plate and the middle part of the arched lower connecting plate are fixedly connected with the upper part and the lower part of the air outlet end of the anode plate positioned right in front of the arched upper connecting plate respectively, the front of the arched upper connecting plate and the front of the arched lower connecting plate and the front lower part of the air outlet end of the arched lower plate and the air outlet end of the auxiliary dust collecting plate are fixedly connected with the auxiliary dust collecting plate.
Preferably, at least in the electric field, another row of conductive filter plates is arranged behind the cathode wire groups, and the air inlet of each conductive filter plate in the other row of conductive filter plates faces to the second cathode wire positioned right in front of the conductive filter plates.
Preferably, the distance between the last second cathode wire of each cathode wire group and the conductive filter plate in the other row of conductive filter plates right behind the last second cathode wire is slightly greater than or equal to the distance between the last second cathode wire and the conductive filter plate in the row of conductive filter plates on the left and right sides of the last second cathode wire.
Preferably, the upper end of each conductive filter plate in the other row of conductive filter plates is welded with a transverse angle steel, and the left end and the right end of the transverse angle steel are fixedly connected with the left side plate and the right side plate of the shell respectively.
Preferably, the other row of conductive filter plates is provided with a set of filter plate side vibrating ash removing devices, and the set of filter plate side vibrating ash removing devices comprises a vibrating shaft, a plurality of integral hammers and a plurality of filter plate vibrating anvils respectively welded on the rear parts of the conductive filter plates in the other row of conductive filter plates.
In each electric field of the high-efficiency conductive filter plate electric dust collector provided by the invention, most of charged dust escaping along the anode plate surface at the rear part of the electric field and most of secondary dust generated when the anode plate is subjected to vibration dust cleaning can enter a row of conductive filter plates arranged at the downstream of a plurality of anode plate rows along with airflow, and can be effectively trapped under the dual effects of electrostatic adsorption and interception filtration. In addition, most of secondary dust generated when each conductive filter plate in the row of conductive filter plates is subjected to vibration dust cleaning can be effectively trapped under the dual functions of electrostatic adsorption and interception filtration. Because one or two second cathode wires of the cathode wire group are arranged between any left and right adjacent conductive filter plates in the row of conductive filter plates, most dust escaping from the air outlet holes of the conductive filter plates along with the air flow, a small part of the dust escaping along the surface of the anode plate at the rear part of the electric field, and a small part of the dust in the flue gas which is far away from the surface of the anode plate at the rear part of the electric field, when the conductive filter plates and the anode plate positioned at the upstream of the conductive filter plates are subjected to rapping ash removal, a small part of secondary dust generated when the conductive filter plates and the air flow enter a channel between any left and right adjacent conductive filter plates in the row of conductive filter plates, the dust can continue to be charged or start to be charged at one side along with the air flow, and meanwhile, the negatively charged dust and the positively charged dust in the channel are respectively migrated towards the conductive filter plates and the second cathode wires under the action of an electric field, and a part of the negatively charged dust is accumulated on the conductive filter plates-naturally, and a part of the positively charged dust is accumulated on the second cathode wire, so that the dust is remarkably improved in the dust removal efficiency of the conductive filter plates.
Drawings
Fig. 1 is a schematic structural view of an electric precipitator with high-efficiency conductive filter plates.
Fig. 2 is a partial enlarged view at I in fig. 1.
Fig. 3 is a schematic structural view of a left filter plate (one) fixedly connected with a plurality of square protruding blocks (one) in the invention.
Detailed Description
In order to make the purpose and technical solution of the present invention more clear, the following description will further explain the content of the present invention by referring to the figures and the embodiments.
The efficient conductive filter plate electric dust collector provided by the invention as shown in fig. 1-3 comprises an air inlet smoke box 10, a shell 20, a first electric field, a second electric field and an air outlet smoke box 90.
The first and second fields each include nine anode plate rows 40 and eight cathode line groups 30. A row of conductive filter plates is provided downstream of the nine anode plate rows 40 and another row of conductive filter plates is provided behind the eight cathode wire sets 30. Nine anode plate rows 40 are arranged in parallel with and alternately with eight cathode line groups 30, and a distance B between any left and right adjacent two anode plate rows 40 of the nine anode plate rows 40 is 450mm. In order to timely perform rapping and ash removal on the cathode-anode system and the other row of conductive filter plates of each electric field, each electric field is provided with a set of anode side rapping and ash removal devices 50 provided with nine integral hammers (one), a set of cathode side rapping and ash removal devices (note: not shown in fig. 1) positioned above the anode side rapping and ash removal devices 50 and provided with eight integral hammers (two), and the other row of conductive filter plates arranged behind the eight cathode line groups 30 is provided with a set of filter plate side rapping and ash removal devices 80.
Each set of filter plate side vibrating ash removal device 80 comprises a vibrating shaft, eight integral hammers (III) and eight filter plate vibrating anvils 77 respectively welded on the rear parts of the conductive filter plates (II) 70 in the other 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). The whole hammers (III) in the filter plate side vibrating ash removing device 80 sequentially strike the filter plate vibrating anvils 77, so that most of dust accumulated on the conductive filter plate (II) 70 can be removed.
Each anode plate row 40 includes eight anode plates 41, an anode rapping bar 42 and an anode rapping anvil. Each of the cathode line groups 30 includes sixteen first cathode lines 31 and one second cathode line 32. Sixteen first cathode lines 31 of one cathode line group 30 are arranged between any left and right adjacent two anode plate rows 40 in the nine anode plate rows 40, and one second cathode line 32 of one cathode line group 30 is arranged between any left and right adjacent two conductive filter plates (one) 60 in the row of conductive filter plates. The distance between the second cathode line 32 and the two conductive filter plates (one) 60 located at the left and right sides thereof is slightly smaller than the distance between the first cathode line 31 and the two anode plate rows 40 located at the left and right sides thereof.
The cross section of the main body of the first cathode line 31 is circular (note: may be changed to be elliptical or other shape), and the cross section of the second cathode line 32 is elliptical (note: may be changed to be circular or other shape), and the long axis of the ellipse is located on the symmetric center line of the cathode line set 30, and the second cathode line 32 has no needle-shaped tip discharge structure and has a smoother outer surface because the first cathode line 31 has no needle-shaped tip discharge structure, and the cross section area of the main body of the first cathode line 31 is significantly smaller than the cross section area of the second cathode line 32, so that the discharge performance of the second cathode line 32 is significantly weaker than the discharge performance of the first cathode line 31.
The row of electrically conductive pads includes nine electrically conductive pads (one) 60 disposed downstream of nine anode plate rows 40. The air inlet of each conductive filter plate (one) 60 faces the air outlet end of the anode plate 41 located right in front of the conductive filter plate. Each conductive filter plate (one) 60 is provided with a plurality of rectangular air outlet holes (one) and has an opening ratio of 47% (note: other values between 15% and 65%, such as 20% or 60%, may be used instead). The rectangular outlet holes (one) have lengths and widths of 43mm and 45mm, respectively, and equivalent diameters of 44mm, although the equivalent diameters may be varied by changing the lengths and/or widths to other values between 30mm and 90mm, such as 35mm or 80mm. A square protruding block (one) 64 is arranged at the downstream of each rectangular air outlet hole (one) in a downward inclined mode, and the upper edge of each rectangular air outlet hole (one) is bordered by the upper edge of the square protruding block (one) 64.
Each conductive filter plate (one) 60 comprises a back filter plate (one) 65, a left filter plate (one) 62, a right filter plate (one) 66 symmetrical to the left filter plate (one) 62, a horizontally arranged arched upper connecting plate (one) (note: not shown in fig. 2), a horizontally arranged arched lower connecting plate (one) 61, and a vertically arranged auxiliary dust collecting plate (one) 63. The back filter plate (one) 65, the left filter plate (one) 62 and the right filter plate (one) 66 are respectively provided with a plurality of rectangular air outlet holes (one), and the opening ratios of the rectangular air outlet holes are equal to the opening ratio of the conductive filter plate (one) 60. The back filter plate (one) 65, the left filter plate (one) 62 and the right filter plate (one) 66 are fixedly connected with the upper ends of a plurality of square protruding blocks (one) 64 which are arranged downwards obliquely at the downstream of a plurality of rectangular air outlet holes (one) respectively, and the upper edge of each rectangular air outlet hole (one) is connected with the upper edge of one square protruding block (one) 64 which is positioned at the downstream of the rectangular air outlet hole (one). The length of the square protruding block (I) 64 is slightly smaller than the length of the rectangular air outlet hole (I), and the width of the square protruding block (I) 64 is slightly smaller than the width of the rectangular air outlet hole (I). The angle between each square bump 64 and the vertical plane is a constant value of 20 ° to 30 °, such as 25 °.
Of course, a plurality of rectangular air outlet holes (I) can be punched directly on a steel plate by a machine, the aperture ratio of the rectangular air outlet holes (I) is a value between 15% and 65%, such as 20% or 60%, the rectangular air outlet holes (I) are punched, a plurality of square protruding blocks (I) 64 are formed after punching, only the upper edge of each square protruding block (I) 64 is connected with the main body of the steel plate, the included angle between each square protruding block (I) 64 and the main body of the steel plate is a certain value between 20 DEG and 30 DEG, such as 25 DEG, and the length and the width of each square protruding block (I) 64 are slightly smaller than the length and the width of each rectangular air outlet hole (I), so that a left side filter plate (I) 62, a right side filter plate (I) 66 or a back filter plate (I) 65 which are connected with the square protruding blocks (I) 64 into a whole can be manufactured.
The back filter plate (one) 65, the left filter plate (one) 62 and the right filter plate (one) 66 are fixedly connected or integrated with the square protrusion blocks (one) 64 in the above manner, so that dust deposited on the surfaces of the back filter plate (one) 65 or the left filter plate (one) 62 or the right filter plate (one) 66 can be prevented from being mixed into dust-containing airflow due to turbulence near the surfaces of the back filter plate (one) 65 or the left filter plate (one) or the right filter plate (one) 66, and part of dust in the dust-containing airflow can be intercepted by the square protrusion blocks (one) 64 when the dust-containing airflow passes through the rectangular air outlet (one).
The front upper end of the left filter plate (one) 62 and the front upper end of the right filter plate (one) 66 are fixedly connected with the left end and the right end of the arched upper connecting plate (one), respectively, while the front lower end of the left filter plate (one) 62 and the front lower end of the right filter plate (one) 66 are fixedly connected with the left end and the right end of the arched lower connecting plate (one) 61, respectively. The rear ends of the left filter plate (one) 62 and the right filter plate (one) 66 are fixedly connected with the left end and the right end of the back filter plate (one) 65 respectively, and the included angles alpha between the left filter plate (one) 62 and the right filter plate (one) 66 and the back filter plate (one) 65 are all a value between 100 DEG and 120 DEG, such as 106 DEG or 115 DEG, so as to facilitate the collection of the charged dust entering the conductive filter plate (one) 60 by the left filter plate (one) 62 and the right filter plate (one) 66.
The auxiliary dust collection plate (one) 63 is disposed vertically between the left filter plate (one) 62 and the right filter plate (one) 66 in a direction parallel to the direction in which the anode plate 41 is disposed immediately in front of it. The upper part and the lower part of the air inlet end of the auxiliary dust collection plate (I) 63 are fixedly connected with the middle part of the arched upper connecting plate (I) and the middle part of the arched lower connecting plate (I) 61 respectively through a plurality of bolts, elastic pads and nuts, the middle part of the arched upper connecting plate (I) and the middle part of the arched lower connecting plate (I) 61 are fixedly connected with the upper part and the lower part of the air outlet end of the anode plate 41 positioned right in front of the arched upper connecting plate (I), and the air outlet end of the auxiliary dust collection plate (I) 63 is fixedly connected with the back filter plate (I) 65. Therefore, by sequentially striking each anode rapping anvil by each integral hammer (one) in the anode side rapping ash removal device 50, most of the dust accumulated on the anode plate row 40 and the conductive filter plate (one) 60 behind the anode rapping anvil can be removed at the same time. Of course, the air inlet end of the auxiliary dust collection plate (one) 63 can be directly fixedly connected with the air outlet end of the anode plate 41 positioned right in front of the air inlet end.
The other row of conductive filter plates includes eight conductive filter plates (two) 70 disposed behind the eight cathode wire sets 30. The upper end of each conductive filter plate (II) 70 is welded with a transverse angle steel, and the left and right ends of the transverse angle steel are respectively and fixedly connected with the left and right side plates of the shell 20 (note: not shown in fig. 1 and 2). The air inlet of each conductive filter plate (two) 70 faces the second cathode line 32 located right in front of the conductive filter plate, so as to effectively collect the electric dust escaping from the channel between any two conductive filter plates (one) 60 adjacent to the left and right in the row of conductive filter plates.
Each conductive filter plate (two) 70 is provided with a plurality of rectangular air outlet holes (two), and the aperture ratio of each conductive filter plate (two) is equal to that of the conductive filter plate (one) 60. The length and the width of the rectangular air outlet hole (II) are respectively the same as those of the rectangular air outlet hole (I). A square boss (two) 74 having an upper edge bordering the upper edge thereof is provided obliquely downward downstream of each of the rectangular outlet holes (two). The length and width of the square bump (two) 74 are equal to the length and width of the square bump (one) 64, respectively.
Each conductive filter plate (two) 70 comprises a back filter plate (two) 75, a left filter plate (two) 72, a right filter plate (two) 76 symmetrical to the left filter plate (two) 72, a horizontally arranged arched upper connecting plate (two) (note: not shown in fig. 2), a horizontally arranged arched lower connecting plate (two) 71, and a vertically arranged auxiliary dust collecting plate (two) 73. The back filter plate (two) 75, the left filter plate (two) 72 and the right filter plate (two) 76 are respectively provided with a plurality of rectangular air outlet holes (two), and the opening ratios of the rectangular air outlet holes are equal to the opening ratio of the conductive filter plate (two) 70. The back filter plate (two) 75, the left filter plate (two) 72 and the right filter plate (two) 76 are fixedly connected with the upper ends of the square protruding blocks (two) 74 which are arranged at the downstream of the rectangular air outlet holes (two) in a downward inclined manner respectively, or are connected with the square protruding blocks (two) 74 which are arranged at the downstream of the rectangular air outlet holes (two) in a downward inclined manner respectively into a whole, and the upper edge of each rectangular air outlet hole (two) is connected with the upper edge of the square protruding block (two) 74 which is positioned at the downstream of the rectangular air outlet hole (two). The angle between each square boss (two) 74 and the vertical plane is equal to the angle between the square boss (one) 64 and the vertical plane.
The back filter plate (two) 75, the left filter plate (two) 72 and the right filter plate (two) 76 are fixedly connected or integrated with the square protruding blocks (two) 74 in the above manner, so that dust adsorbed by the back filter plate (two) 75 or the left filter plate (two) 72 or the right filter plate (two) 76 is prevented from being mixed into the dust-containing airflow due to turbulence near the surface of the back filter plate (two) 75 or the left filter plate (two) or the right filter plate (two), and part of the dust in the dust-containing airflow can be intercepted by the square protruding blocks (two) 74 when the dust-containing airflow passes through the rectangular air outlet (two).
The front upper end of the left filter plate (two) 72 and the front upper end of the right filter plate (two) 76 are fixedly connected with the left end and the right end of the arched upper connecting plate (two), respectively, while the front lower end of the left filter plate (two) 72 and the front lower end of the right filter plate (two) 76 are fixedly connected with the left end and the right end of the arched lower connecting plate (two) 71, respectively. The rear ends of the left filter plate (II) 72 and the right filter plate (II) 76 are fixedly connected with the left and right ends of the back filter plate (I) 75 respectively, and the included angles beta between the left filter plate (II) 72 and the right filter plate (II) 76 and the back filter plate (II) 75 are also a value between 100 DEG and 120 DEG, such as 106 DEG or 115 DEG, so as to facilitate the collection of the charged dust entering the conductive filter plate (II) 70 by the left filter plate (II) 72 and the right filter plate (II) 76.
The auxiliary dust collection plate (two) 73 is vertically disposed between the left filter plate (two) 72 and the right filter plate (two) 76 in a direction parallel to the direction in which the one of the cathode line groups 30 located directly in front thereof is disposed. The upper part and the lower part of the air inlet end of the auxiliary dust collection plate (II) 73 are fixedly connected with the middle part of the arched upper connecting plate (II) and the middle part of the arched lower connecting plate (II) 71 respectively through a plurality of bolts, elastic gaskets and nuts, and the air outlet end of the auxiliary dust collection plate (II) 73 is fixedly connected with the back filter plate (II) 75.
Since the cross section of the second cathode line 32 in the present embodiment is elliptical, and the major axis of the ellipse is located on the symmetry center line of the cathode line set 30, the distance between the second cathode line 32 and the conductive filter plate (two) 70 located right behind the second cathode line should be slightly larger than the distance between the second cathode line and the conductive filter plate (one) 60 located on the left and right sides of the second cathode line so as not to affect the electric field operation voltage. However, when the cross section of the second cathode line 32 is changed to be circular, the distance between the second cathode line 32 and the conductive filter plate (two) 70 located right behind it is only required to be equal to the distance between the second cathode line 32 and the conductive filter plates (one) 60 located on the left and right sides thereof to reduce the length of the housing 20. The second cathode line 32 is fixedly connected to the cathode frame, which is located right in front of the second cathode line, and is provided with a plurality of first cathode lines 31, see fig. 2. The method for fixing the second cathode wires 32 to the cathode frame on which the plurality of first cathode wires 31 are mounted is not only suitable for newly-built electric precipitators, but also convenient for modifying old electric precipitators.
In addition, if the distance between the second cathode line 32 and the conductive filter plate (two) 70 located right behind it is significantly larger than the distance between the first cathode line 31 and the anode plate rows 40 located on the left and right sides thereof (note: 225 mm), another second cathode line 32 may be additionally provided right behind the second cathode line 32, and the distance between the other second cathode line 32 and the conductive filter plate (two) 70 located right behind it is slightly larger than the distance between the second cathode line 32 and the conductive filter plate (one) 60 located on the left and right sides thereof, however, the distance between the two second cathode lines 32 may be smaller than 100mm. Of course, the distance between the second cathode line 32 and the other second cathode line 32 and the two conductive filter plates (one) 60 located at the left and right sides thereof is slightly smaller than the distance between the first cathode line 31 and the two anode plate rows 40 located at the left and right sides thereof.
Four additional points are described below:
First, in each of the above-mentioned electric fields, most of the charged dust escaping along 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 rapped for ash removal are effectively trapped by the row of conductive filter plates disposed downstream of the nine anode plate rows 40 as the air flow enters the row. Because one or two second cathode wires 32 of one cathode wire group 30 are arranged between any left and right adjacent conductive filter plates 60 in the row of conductive filter plates, most of dust escaping from the air outlet holes of the conductive filter plates 60 along with air flow, a small part of the dust escaping along the surface of the anode plate 41 at the rear part of the electric field, and the dust in smoke far away from the surface of the anode plate 41 at the rear part of the electric field are accumulated on the dust collector, namely, the dust collector 32 at the left side (one) 62, the dust collector 66 at the right side and the anode plate 41 at the upstream side are raised in dust collection efficiency, and the dust collector 32 is increased remarkably.
In addition, since the second cathode line 32 is disposed right in front of each conductive filter plate (two) 70 in the other row of conductive filter plates, and the distance between the two cathode lines is relatively small, the charge amount of the charged dust when the airflow advances to the air inlet of the conductive filter plate (two) 70 can be remarkably increased, so that the collection efficiency of the charged dust escaping from the channel between any two conductive filter plates (one) 60 adjacent to the left and right along with the airflow is remarkably enhanced.
Second, in the above-mentioned respective electric fields, although the distance between the respective second cathode lines 32 of each cathode line group 30 and the two conductive filter plates (one) 60 located at the left and right sides thereof, the distance between the last second cathode line 32 of each cathode line group 30 and the one conductive filter plate (two) 70 located directly behind thereof is slightly smaller than the distance between the respective first cathode lines 31 and the two anode plate rows 40 located at the left and right sides thereof, the operation voltage of the above-mentioned respective electric fields is not lowered because the discharge property of the second cathode lines 32 is significantly weaker than that of the first cathode lines 31. Naturally, the second cathode line 32 is disposed so as not to reduce the efficiency of the anode plate row 40 for collecting the charged dust in the flue gas flowing alongside it nor the efficiency of the conductive filter plates (one) 60 and (two) 70 for collecting the charged dust in the flue gas entering therein, nor the efficiency of the left filter plate (one) 62 and the right filter plate (66) of the conductive filter plate (one) 60 and the square bump (one) 64 facing the second cathode line 32 for collecting the negatively charged dust in the passage between any left and right adjacent two conductive filter plates (one) 60 in the row of conductive filter plates as the air flow advances.
Thirdly, if the dust concentration of the inlet flue gas of the electric precipitator is relatively high, after the length of the casing 20 is properly prolonged, the first electric field and/or the second electric field can be additionally arranged, and a plurality of conductive filter plates (one) 60 are arranged at the 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 electric precipitator is relatively low, the plurality of conductive filter plates (two) 70 and the filter plate side vibrating ash removing devices 80 arranged at the downstream of the anode plate row of the first electric field and/or the second electric field can be omitted, and the length of the shell 20 can be correspondingly shortened.
Fourth, one can eliminate all square-shaped raised blocks (one) 64 on each conductive filter plate (one) 60 and all square-shaped raised blocks (two) 74 on each conductive filter plate (two) 70, and eliminate all rectangular air outlet holes (one) on each conductive filter plate (one) 60 and all rectangular air outlet holes (two) on each conductive filter plate (two) 70, and then appropriately open a plurality of circular air outlet holes or oval air outlet holes with equivalent diameters of not more than 10mm (such as 3mm or 8 mm) on the air outlet holes, and the opening ratio of the circular air outlet holes or oval air outlet holes is a value between 15% and 65%, such as 20% or 60%, so as to manufacture the two conductive filter plates.
The principle and structure of the conventional method known to those skilled in the art can be known by those skilled in the art through related technical books, or can be known through conventional experimental methods, for example, the installation and use of an electric field formed by an anode plate row and a cathode wire set are all conventional methods or techniques, and the invention is not repeated.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical substance of the present invention still fall within the scope of the present invention.
Claims (10)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001046907A (en) * | 1999-08-06 | 2001-02-20 | Mitsubishi Heavy Ind Ltd | Electric dust collector |
| CN104606997A (en) * | 2015-02-06 | 2015-05-13 | 廖世平 | Electrostatic filtering deduster |
| CN206965936U (en) * | 2017-03-15 | 2018-02-06 | 张家口宣化昌通环保设备有限公司 | A kind of Novel anode filter pocket device |
| CN215878338U (en) * | 2021-06-29 | 2022-02-22 | 福建欣隆环保股份有限公司 | A high-efficiency conductive filter plate electrostatic precipitator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5655841B2 (en) * | 2012-10-30 | 2015-01-21 | パナソニックＩｐマネジメント株式会社 | Electric dust collector |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001046907A (en) * | 1999-08-06 | 2001-02-20 | Mitsubishi Heavy Ind Ltd | Electric dust collector |
| CN104606997A (en) * | 2015-02-06 | 2015-05-13 | 廖世平 | Electrostatic filtering deduster |
| CN206965936U (en) * | 2017-03-15 | 2018-02-06 | 张家口宣化昌通环保设备有限公司 | A kind of Novel anode filter pocket device |
| CN215878338U (en) * | 2021-06-29 | 2022-02-22 | 福建欣隆环保股份有限公司 | A high-efficiency conductive filter plate electrostatic precipitator |
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