CN113634373A - Electric dust collector with porous dust collecting electrodes and electric dust collecting method - Google Patents
Electric dust collector with porous dust collecting electrodes and electric dust collecting method Download PDFInfo
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- CN113634373A CN113634373A CN202111083143.XA CN202111083143A CN113634373A CN 113634373 A CN113634373 A CN 113634373A CN 202111083143 A CN202111083143 A CN 202111083143A CN 113634373 A CN113634373 A CN 113634373A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact
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Abstract
The invention discloses an electric dust collector with a porous dust collecting electrode and an electric dust collecting method, wherein the porous dust collecting electrode plates of the electric dust collector with the porous dust collecting electrode are fixedly arranged in an inner cavity of a shell, and a plurality of porous dust collecting electrode plates are parallel to each other and are arranged at intervals; a smoke inlet and a smoke outlet are respectively arranged at two ends of the porous dust collecting polar plates on the shell, and each porous dust collecting polar plate is connected with an ash cleaning rapping device; each discharge wire is connected with a dust-cleaning rapping device; a plurality of discharge wires are arranged between the adjacent porous dust collecting polar plates at intervals; the thickness of the porous dust collecting polar plate is 40-60mm, a plurality of circular through holes are uniformly formed in the porous dust collecting polar plate, and the aperture of each circular through hole is 20-40 mm; the section of the discharge wire is circular; an ash bucket is arranged on the shell below an electric field channel between the porous dust collecting polar plate and the circular discharge wire. The invention can improve the trapping efficiency of fine particles, has good collecting effect on fine particles with the particle size of less than 10 mu m, and meets the problem of environmental protection requirement.
Description
Technical Field
The invention belongs to the technical field of dust removal in the electric power industry or the non-electric industry, and particularly relates to an electric dust collector with a porous dust collecting electrode and an electric dust removing method.
Background
The electric dust collector is one of main equipment for purifying industrial flue gas, and is widely applied to the industrial fields of electric power, metallurgy, building materials and the like due to the advantages of high total dust removal efficiency, low body resistance, large flue gas treatment amount, high-temperature resistance, strong corrosive gas resistance, low operation and maintenance cost and the like. The electric dust collector is a device for separating suspended particles in gas by using electric power, and although various types and structures of electric dust collectors are used in practical applications, the electric dust collectors are based on the same working principle. The dust removal process of the electric dust remover can be divided into four stages, namely ionization of gas, charge of suspended particles, migration and sedimentation of charged particles and dust removal. The electric dust collector can effectively collect aerosol particles with any particle size theoretically. However, in practical industrial applications, the efficiency of capturing submicron particles and ultrafine particles is not desirable. However, in the face of more strict ultra-low emission standards, the electric dust collector is in urgent need to further improve the collection efficiency of fine particulate matters in both the electric power industry and the non-electric industry.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide an electric dust collector with a porous dust collecting electrode and an electric dust collecting method.
The technical scheme adopted by the invention is as follows:
an electric dust collector with a porous dust collecting electrode comprises a shell, an ash cleaning rapping device, a plurality of porous dust collecting polar plates and a discharge wire;
the porous dust collecting polar plates are fixedly arranged in the inner cavity of the shell, and the plurality of porous dust collecting polar plates are parallel to each other and are arranged at intervals;
a smoke inlet and a smoke outlet are respectively arranged at two ends of the porous dust collecting polar plates on the shell, and each porous dust collecting polar plate is connected with an ash cleaning rapping device; each discharge wire is connected with a dust-cleaning rapping device;
a plurality of discharge wires are arranged between the adjacent porous dust collecting polar plates at intervals;
the thickness of the porous dust collecting polar plate is 40-60mm, a plurality of circular through holes are uniformly formed in the porous dust collecting polar plate, and the aperture of each circular through hole is 20-40 mm;
the section of the discharge wire is circular;
an ash bucket is arranged on the shell below an electric field channel between the porous dust collecting polar plate and the circular discharge wire.
Preferably, the aperture ratio of the porous dust collecting pole plate is 20-60%.
Preferably, the distance between adjacent circular through holes on the porous dust collecting polar plate is 10-100 mm.
Preferably, the distance between two adjacent porous dust collecting electrode plates is 400-500mm, the distance between two adjacent discharge wires between two adjacent porous dust collecting electrode plates is 200-300mm, and the diameter of the discharge wire is 0.5-5 mm.
Preferably, a suspension beam and an impact rod are respectively arranged above and below each porous dust collection polar plate, and the upper edge and the lower edge of each porous dust collection polar plate are respectively and fixedly connected with the suspension beam and the impact rod through a plurality of pin shafts.
Preferably, the dust cleaning rapping device connected with the porous dust collecting polar plate is arranged above the porous dust collecting polar plate and connected with the shell, and the rapping rod on the dust cleaning rapping device is connected with the upper edge of the porous dust collecting polar plate.
Preferably, the deashing rapping device that connects on the discharge wire sets up in the top of discharge wire and is connected with the shell, and the rapping bar on the deashing rapping device is connected with the upper end of discharge wire, and the lower extreme of discharge wire is connected with the weight that can make the discharge wire straighten.
Preferably, the flue gas inlet is arranged to be a gradually expanding opening, and the caliber of the flue gas inlet is gradually increased along the flow direction of the flue gas;
the exhanst gas outlet sets up in the convergent opening, and exhanst gas outlet's bore reduces along the flue gas flow direction gradually.
The invention also provides an electric dust removal method of the electric dust remover based on the porous dust collection electrode, which comprises the following steps:
connecting the porous dust collecting polar plate and the discharge wire with two poles of a power supply respectively, and forming an electric field in an electric field channel between the porous dust collecting polar plate and the discharge wire;
and the smoke with the particulate matters flows into an electric field channel between the porous dust collecting polar plate and the discharge line from the smoke inlet, the particulate matters are adsorbed and collected by the porous dust collecting polar plate and deposited on the surface of the porous dust collecting polar plate and in the circular through hole, and the smoke from which the particulate matters are removed is discharged from the smoke outlet.
Preferably, the hole dust collecting polar plate is grounded, and the potential of the discharge wire is 60-80 kV; the wind speed of the electric field between two adjacent porous dust collecting polar plates is 0.8-1.5 m/s.
The invention has the following technical effects:
compared with the existing electric dust collector, the electric dust collector with the porous dust collecting electrode has the advantages that the dust collecting electrode plate is arranged in a porous structure, namely a plurality of circular through holes are uniformly formed in the porous dust collecting electrode plate, the circular through holes hardly affect the space charge density and the electric field intensity, but can significantly affect the electric field intensity of an 1/7 line plate spacing area near the porous dust collecting electrode plate, the electric field intensity Ex parallel to the surface of the porous dust collecting electrode plate is increased in the area and always points to the nearest central position of the solid part of the porous dust collecting electrode plate, deposition of particles on the side surface and the back surface of the porous dust collecting electrode plate is facilitated, the electric field intensity Ey vertical to the porous dust collecting electrode plate is reduced at the position of the circular through hole, the solid part of the porous dust collecting electrode plate is increased, the average value is slightly changed, and the electric field intensity near the surface of the porous dust collecting electrode plate is increased. Under the structure of the porous dust collecting polar plate, part of airflow carrying particulate matters can enter a cavity of a through hole on the porous dust collecting polar plate, and the wind speed of an electric field in the x direction in a certain range near the porous dust collecting polar plate is obviously reduced due to the shunting effect of the circular through hole, so that the influence of secondary dust emission is favorably inhibited; meanwhile, the air flow can carry particles into the circular through holes in the porous dust collecting polar plate, the low flow rate in the circular through holes prolongs the retention time of the particles in an electric field, and the deposition of tiny particles in the circular through holes is facilitated. In conclusion, the present invention can further improve the efficiency of trapping fine particulate matter.
Drawings
FIG. 1 is a front view of the overall structure of an electric dust collector with porous dust collecting electrodes;
FIG. 2 is a side view of an electric precipitator with porous collecting electrodes according to the present invention;
FIG. 3(a) is a front view of a porous dust collecting electrode plate of the present invention; fig. 3(b) is a schematic diagram of the relative position between the porous dust collecting electrode plate and the discharge lines, wherein L represents the plate length of the porous dust collecting electrode plate, d represents the hole pitch of the through holes at the center of a circle on the porous dust collecting electrode plate, E represents the thickness of the porous dust collecting electrode plate, and a represents the line pitch between the discharge lines; b represents the plate interval between the adjacent porous dust collecting polar plates;
FIG. 4 is a schematic diagram of two-dimensional arrangement of porous dust collecting electrodes and discharge electrodes in the embodiment of the invention
FIG. 5 is a field strength distribution plot in an embodiment of the present invention;
FIG. 6 is a flow chart in an embodiment of the present invention;
FIG. 7 is a graph of particle trajectories in an embodiment of the present invention;
in the figure, 1-inlet horn, 2-pin shaft, 3-deashing rapping device, 4-suspension beam, 5-porous dust collecting polar plate, 6-impact rod, 7-ash bucket, 8-outlet horn, 9-circular through hole, 10-rapping rod, 11-heavy hammer and 12-discharge line.
Detailed Description
The present invention will be explained in more detail with reference to the drawings and examples.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
The overall scheme of the invention is based on the influence of the electric wind effect on the motion state of the fine particles, and can further improve the collection efficiency of the fine particles from the aspect of reducing the turbulence phenomenon near the dust collection electrode.
Referring to fig. 1 and 2, the porous dust collecting electrode electric dust collector applicable to a dust collecting system in the electric power industry or the non-electric industry comprises a shell, porous dust collecting polar plates 5 and discharge wires 12 with circular sections, wherein circular holes (namely circular through holes 9) are uniformly formed in the porous dust collecting polar plates 5, the upper ends of the porous dust collecting polar plates 5 are connected with the lower ends of upper pin shafts 2, the upper ends of the upper pin shafts 2 are fixedly connected with a suspension beam 4, the upper ends of the porous dust collecting polar plates 5 are fixedly connected with the lower ends of rapping rods 10 of dust cleaning rapping devices 3, the dust cleaning rapping devices 3 are arranged on the shell, the discharge wires 12 are arranged in the middle positions of two adjacent porous dust collecting polar plates 5, the upper ends of the discharge wires 12 are fixedly connected with the lower ends of the rapping rods 10 of the dust cleaning rapping devices 3, the dust cleaning discharge rapping devices 2 are connected with the shell, the lower ends of the dust cleaning rapping wires 12 are connected with a heavy hammer 11, and the lower ends of the porous dust collecting polar plates 5 are connected with the upper ends of the lower pin shafts 2, the lower end of a pin shaft 2 below is fixedly connected with an impact rod 6, an ash hopper 7 is arranged below an electric field channel between a porous dust collecting pole plate 5 and a discharge wire 12 on a shell, an inlet bell mouth 1 (namely a flue gas inlet) on the shell is positioned at the front end (the left end shown in figure 1, namely the upwind direction of flue gas flowing) of the porous dust collecting pole plate 5, and an outlet bell mouth (namely a flue gas outlet) on the shell is positioned at the rear end (the right end shown in figure 1, namely the downwind direction of flue gas flowing) of the porous dust collecting pole plate 5.
Referring to fig. 1, 3(a) and 3(b), a plurality of circular through holes 9 are formed in the porous dust collecting electrode plate 5, and the circular through holes 9 are arranged at the same interval.
As a preferred embodiment of the invention, referring to FIG. 3(b), the spacing between the porous dust collecting electrodes is 400-500mm, and the spacing between the round wire discharge electrodes is 200-300 mm. The thickness of the cavity of the porous dust collecting polar plate is 40-60mm, and the pore diameter of the porous dust collecting polar plate is 20-40 mm.
As a preferred embodiment of the invention, the ratio of the total area of the plurality of circular through holes 9 to the total area of the porous dust collecting electrode plate 5 has an opening ratio satisfying the following relationship:
wherein n represents the number of holes of the porous plate, r is the radius of the holes, H is the height of the porous plate, and D is the length of the porous plate.
The invention also provides a trapping method of the porous dust collecting electrode electric dust remover, which is suitable for a dust removing system in the electric power industry or the non-electric power industry, and the trapping method is carried out by adopting the porous dust collecting electrode electric dust remover, and comprises the following processes:
smoke carrying particulate matters is blown in from an inlet bell mouth 1 and enters an electric field channel between the porous dust collection polar plate 5 and the discharge wire 12, the discharge wire 12 is connected with an external voltage, the surface potential of the discharge wire 12 is an external voltage value, the surface potential of the porous dust collection polar plate 5 is zero under the grounding condition, and an electric field is generated in the electric field channel. The high-intensity electric field on the surface of the discharge wire 12 ionizes the gas to generate a large amount of free electrons and positive ions, the particulate matters entering the electric field are combined with the free electrons and the positive ions to be charged, the charged particles are adsorbed and trapped by the porous dust collection polar plate 5 under the action of the electric field force, and the purified clean flue gas is discharged to the outlet bell mouth 8 from the electric field channel. The dust cleaning rapping device is used for controlling the discharge wire 12 and the porous dust collecting pole plate 5 which are connected by the rapping rod 10, and particulate matters collected on the discharge wire 12 and the porous dust collecting pole plate 5 are removed and fall into the ash bucket 7 below.
As a preferred embodiment of the invention, the external voltage value is 60-80 kV. The wind speed of the electric field is 0.8-1.5 m/s.
The electric dust collector with the porous dust collecting electrode is suitable for a dust collecting system in the electric power industry or the non-electric industry. The dust collecting polar plate is embodied in a porous plate type, the electric dust collector of the porous dust collecting electrode remarkably improves the electric field intensity of an 1/7 wire plate interval area near the porous plate, in the area, the electric field intensity Ex parallel to the surface of the porous plate is increased and always points to the nearest central position of the solid part of the porous plate, so that the deposition of particles on the side surface and the back surface is facilitated, the electric field intensity Ey vertical to the porous plate is reduced at the position of a circular through hole, the electric field intensity Ey is increased at the solid part of the porous plate, the average value is slightly changed, and the electric field intensity near the surface of the plate is increased. Due to the shunting effect of the circular through holes, the wind speed of the electric field in the x direction within the range of 5mm near the porous plate is reduced by 12.5%, and the influence of secondary dust emission is favorably inhibited; meanwhile, the air flow can carry particles into the cavity of the porous plate, the low flow rate in the cavity of the porous plate prolongs the retention time of the particles in the electric field, and the particles are favorably deposited in the cavity of the porous plate. Meanwhile, the device has a good collecting effect on fine particles with the particle size of less than 10 microns, improves the effective driving speed of the fine particles by 30-36 percent, and meets the problem of environmental protection. A dust removal device for collecting dust in smoke dust is used in a dust removal system in the power industry or the non-power industry.
The particle charging process corresponds to the electric field performance analysis, and the circular through holes hardly affect the particle charging amount and the charging process of the particles; after the particles enter the electric dust collector, the charge of the particles is gradually increased and finally kept constant. When the particles move to the first corona wire position, the 80% particle charging process is complete. The final charge of the particles is directly related to the particle size, and the final charge of the 5 μm particles is about 43 times that of the 0.3 μm particles.
The probability of a plate trapping particles is related to the position of the particle's initial incident electric field, with particles released near the surface of the inlet plate being more easily collected than particles released in the middle of the inlet. The particles eventually settle out and distribute on the front, back, and sides of the perforated plate. The particles move towards the porous plate under the combined action of the electric field and the flow field, when the particles move to the area near the porous plate, part of the particles can be deposited on the front surface of the porous plate, and the other part of the particles enter the cavity of the porous plate due to the action of the electric fluid and are finally deposited in the cavity. Even if a small part of particles return to the electric field channel along with the airflow at the tail end of the dust collecting pole, the particles are finally deposited on the front surface of the porous plate under the action of the electric field force, and dust can not escape.
The wind speed of the electric field with the x-direction component in the area near the porous plate can be reduced, which is helpful for reducing the influence of secondary dust emission caused by rapping for dust removal; after the dust collecting polar plate is perforated, the back corona phenomenon caused by high specific resistance dust can be inhibited, and the normal and stable operation of the electric dust collector is maintained.
The perforated plate is perforated and is compared with a flat plate without the perforated plate, the effective driving speed of the fine particles can be improved by the perforated plate, and the dust collecting polar plate is favorable for collecting the dust to collect the fine particles.
Examples
The embodiment is suitable for a porous dust collecting electrode electric dust collector in a dust removing system in the electric power industry or the non-electric industry, and comprises a shell, a porous dust collecting polar plate 5 and a discharge wire 12 with a circular section, wherein circular holes (namely circular through holes 9) are uniformly formed in the porous dust collecting polar plate 5, the upper end of the porous dust collecting polar plate 5 is connected with the lower end of a pin shaft 2 above the porous dust collecting polar plate, the upper end of the pin shaft 2 above the porous dust collecting polar plate is connected and fixed with a suspension beam 4, the upper end of the porous dust collecting polar plate 5 is fixedly connected with the lower end of a vibrating rod 10 of an ash cleaning vibrating and beating device 3, the ash cleaning vibrating and beating device 3 is installed on the shell, the discharge wire 12 is arranged in the middle position of two adjacent porous polar plates 5, the upper end of the discharge wire 12 is fixedly connected with the lower end of the vibrating and beating rod 10 of the ash cleaning vibrating and beating device 3, the ash cleaning vibrating and beating device 2 is connected with the shell, the lower end of the discharge wire 12 is connected with a heavy hammer 11, and the lower end of the porous dust collecting polar plate 5 is connected with the upper end of the pin shaft 2 below the porous dust collecting polar plate, the lower end of a pin shaft 2 below is fixedly connected with an impact rod 6, an ash hopper 7 is arranged below an electric field channel between a porous dust collecting pole plate 5 and a discharge wire 12 on a shell, an inlet bell mouth 1 (namely a flue gas inlet) on the shell is positioned at the front end (the left end shown in figure 1, namely the upwind direction of flue gas flowing) of the porous dust collecting pole plate 5, and an outlet bell mouth (namely a flue gas outlet) on the shell is positioned at the rear end (the right end shown in figure 1, namely the downwind direction of flue gas flowing) of the porous dust collecting pole plate 5. As shown in fig. 3(B), the distance B between the porous dust collecting electrodes is 400mm, the radius of the discharge electrode 12 is 1mm, the distance a between the discharge electrodes 12 is 240mm, the length of the porous dust collecting electrode plate 5 is 480mm, the height of the porous dust collecting electrode plate 5 is 450mm, the thickness E of the cavity of the porous dust collecting electrode plate 5 (i.e., the length of the circular through hole 9) is 50mm, the aperture of the circular through hole 9 is 30mm, the hole distance of the circular through hole 9 is 50mm, the external voltage is 65kV (average field strength is 3.25kV/cm), and the wind speed of the electric field is 1 m/s.
Smoke carrying particulate matters is blown in from an inlet bell mouth 1 and enters an electric field channel between the porous dust collection polar plate and the circular discharge wire at the electric field wind speed of 1m/s, the surface potential of the circular discharge wire connected with an external voltage is 65kV, the surface potential of the porous dust collection polar plate is zero under the grounding condition, an electric field is generated in the electric field channel, and the average field intensity is 3.25 kV/cm. The high-strength electric field on the surface of the discharge wire enables gas to be ionized to generate a large number of free electrons and positive ions, particulate matters enter the electric field to be combined with the free electrons and the positive ions to be charged, the particulate matters are adsorbed and trapped by the porous dust collection polar plate under the action of the electric field force, and the purified clean air is discharged to the outlet bell mouth from the electric field channel. The dust cleaning rapping device is used for controlling the discharge wire and the porous dust collecting polar plate which are connected by the rapping rod, and removing particulate matters trapped on the discharge wire and the porous dust collecting polar plate and falling into the dust hopper below.
In order to verify the capability of the electric dust collector with the porous dust collecting electrode in the embodiment for collecting micro-fine particles and analyze the characteristics of an electric field and a flow field in the dust collector, a two-dimensional model of the electric dust collector with the porous dust collecting electrode is simplified on the premise of not influencing the calculation precision. The arrangement mode is shown in detail in figure 4, the length of the dust collecting pole plate is 1440mm, the thickness of the dust collecting pole plate and the cavity is 50mm, the aperture is 30mm, the hole interval is 50mm, the aperture ratio is 35.4%, the diameter of the discharge wire is 1mm, 5 discharge wires are selected, the interval is 240mm, and the plate interval is 400 mm.
And simulating the electrical characteristics, flow field characteristics and particle motion characteristics in the channel of the porous dust collecting electrode electric dust remover by using numerical simulation software CommolMultiphysics. The control equation of the electric field adopts a simplified potential Poisson equation and a current continuous equation, and the solving result of the electric field is shown in figure 5 in detail; the flow field control equation adopts a time-averaged Navier-Stokes equation and a Reynolds stress standard turbulence model to carry out effective solution, and the detailed flow field solution result is shown in FIG. 6; the method for describing particle motion adopts a Lawless model to simulate a particle charging process, the particle motion trajectory is shown in figure 7 in detail, and the trapping results of particles with different particle diameters are as follows:
the particle size is more than 5 mu m, 5000 particles are released at the inlet, 0 escapes from the outlet, and the separation efficiency is 100 percent.
The particle size is 5 μm, 5000 particles are released at the inlet, 892 particles escape at the outlet, the separation efficiency is 82.16%, and the effective driving speed is increased by 33.96%.
The particle size is 1 mu m, 5000 particles are released at the inlet, 3374 particles escape at the outlet, the separation efficiency is 32.52 percent, and the effective driving speed is improved by 35.08 percent.
The particle size is 0.1 μm, 5000 particles are released at the inlet, 3256 particles escape at the outlet, the separation efficiency is 34.88%, and the effective driving speed is improved 35.61%.
The particle size is 0.05 μm, 5000 particles are released at the inlet, 2373 particles escape at the outlet, the separation efficiency is 52.54%, and the effective driving speed is improved by 32.33%.
According to the results, the separation efficiency is improved, the separation capacity of the dust collecting polar plate for small-particle-size particles after being perforated is greatly improved, the effective driving speed can be improved by 30% -36%, and the flow chart shows that airflow enters an electric field channel, the whole flow field is uniform, and no vortex is generated.
Referring to fig. 5, it is shown that the porous dust collecting electrode electric precipitator of the present embodiment has a suitable overall electric field distribution, which is beneficial to charging and trapping of particulate matters.
Referring to fig. 6, it is shown that the flow field in the electric dust collector with porous dust collecting electrodes of the present embodiment is uniform, and no significant vortex is generated.
Referring to fig. 7, the electric dust collector with the porous dust collecting electrode in the embodiment is shown, wherein particulate matters are trapped and finally distributed on the front surface, the back surface, the side surfaces and the inside of the cavity of the porous plate in a sedimentation manner.
The porous dust collection electrode electric dust collector can effectively improve the problem of low separation efficiency of the electric dust collector on particles with the particle size of less than 10 mu m, and solves the problems of substandard emission in the particle collection process of the existing equipment and insufficient collection efficiency of the original electric dust collector. The equipment can be widely applied to various industries, such as coal power, steel and the like, can treat particles with different particle size distributions, and has the advantages of simple manufacture, small body resistance and wide market prospect.
Claims (10)
1. An electric dust collector with a porous dust collecting electrode is characterized by comprising a shell, an ash cleaning rapping device (3), a plurality of porous dust collecting polar plates (5) and a discharge wire (12);
the porous dust collecting polar plates (5) are fixedly arranged in the inner cavity of the shell, and the plurality of porous dust collecting polar plates (5) are parallel to each other and are arranged at intervals;
a smoke inlet and a smoke outlet are respectively arranged at two ends of the porous dust collecting polar plates (5) on the shell, and each porous dust collecting polar plate (5) is connected with an ash cleaning rapping device (3); each discharge wire (12) is connected with an ash removal rapping device (3);
a plurality of discharge wires (12) are arranged between the adjacent porous dust collecting polar plates (5) at intervals;
the thickness of the porous dust collecting polar plate (5) is 40-60mm, a plurality of circular through holes (9) are uniformly formed in the porous dust collecting polar plate (5), and the aperture of each circular through hole is 20-40 mm;
the section of the discharge wire (12) is circular;
an ash bucket (7) is arranged below an electric field channel between the porous dust collecting polar plate (5) and the circular discharge wire (12) on the shell.
2. The electric dust collector with the porous dust collecting electrodes as claimed in claim 1, wherein the aperture ratio of the porous dust collecting electrode plates (5) is 20-60%.
3. The electric dust collector with the porous dust collecting electrodes as claimed in claim 1, wherein the distance between adjacent circular through holes on the porous dust collecting polar plate (5) is 10-100 mm.
4. The electric dust collector with the porous dust collecting electrodes as claimed in claim 1, wherein the distance between two adjacent porous dust collecting electrode plates (5) is 400-500mm, the distance between two adjacent discharge wires (12) between two adjacent porous dust collecting electrode plates (5) is 200-300mm, and the diameter of the discharge wires (12) is 0.5-5 mm.
5. The electric dust collector with the porous dust collection electrodes as claimed in claim 1, wherein a suspension beam (4) and an impact rod (6) are respectively arranged above and below each porous dust collection pole plate (5), and the upper edge and the lower edge of each porous dust collection pole plate (5) are respectively and fixedly connected with the suspension beam (4) and the impact rod (6) through a plurality of pin shafts (2).
6. The electric dust collector with the porous dust collecting electrode as claimed in claim 1, wherein the dust cleaning rapping device (3) connected to the porous dust collecting electrode plate (5) is arranged above the porous dust collecting electrode plate (5) and connected with the shell, and a rapping rod (10) on the dust cleaning rapping device (3) is connected with the upper edge of the porous dust collecting electrode plate (5).
7. The electric dust collector with the porous dust collecting electrode as claimed in claim 1, wherein the ash cleaning rapping device (3) connected to the discharge line (12) is arranged above the discharge line (12) and connected with the housing, a rapping rod (10) on the ash cleaning rapping device (3) is connected with the upper end of the discharge line (12), and the lower end of the discharge line (12) is connected with a heavy hammer (11) capable of straightening the discharge line (12).
8. The electric dust collector with the porous dust collecting electrodes as claimed in claim 1, wherein the flue gas inlet is arranged to be a gradually expanding opening, and the caliber of the flue gas inlet is gradually increased along the flow direction of the flue gas;
the exhanst gas outlet sets up in the convergent opening, and exhanst gas outlet's bore reduces along the flue gas flow direction gradually.
9. An electric dust removing method of an electric dust remover based on the porous dust collecting electrode of any one of claims 1 to 8 is characterized by comprising the following processes:
the porous dust collecting polar plate (5) and the discharge wire (12) are respectively connected with two poles of a power supply, and an electric field is formed in an electric field channel between the porous dust collecting polar plate (5) and the discharge wire (12);
the flue gas with particulate matters flows into an electric field channel between the porous dust collecting polar plate (5) and the discharge wire (12) from the flue gas inlet, the particulate matters are adsorbed and collected by the porous dust collecting polar plate (5) and deposited on the surface of the porous dust collecting polar plate (5) and in the circular through hole (9), and the flue gas from which the particulate matters are removed is discharged from the flue gas outlet.
10. An electric precipitation method according to claim 9, characterized in that the hole dust collecting pole plate (5) is grounded, and the potential of the discharge wire (12) is 60-80 kV; the wind speed of the electric field between two adjacent porous dust collecting polar plates (5) is 0.8-1.5 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111083143.XA CN113634373A (en) | 2021-09-15 | 2021-09-15 | Electric dust collector with porous dust collecting electrodes and electric dust collecting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111083143.XA CN113634373A (en) | 2021-09-15 | 2021-09-15 | Electric dust collector with porous dust collecting electrodes and electric dust collecting method |
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| Publication Number | Publication Date |
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| CN113634373A true CN113634373A (en) | 2021-11-12 |
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| CN202111083143.XA Pending CN113634373A (en) | 2021-09-15 | 2021-09-15 | Electric dust collector with porous dust collecting electrodes and electric dust collecting method |
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2021
- 2021-09-15 CN CN202111083143.XA patent/CN113634373A/en active Pending
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