CN111921714B - Return air-proof electrostatic dust collector - Google Patents
Return air-proof electrostatic dust collector Download PDFInfo
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- CN111921714B CN111921714B CN202010937978.6A CN202010937978A CN111921714B CN 111921714 B CN111921714 B CN 111921714B CN 202010937978 A CN202010937978 A CN 202010937978A CN 111921714 B CN111921714 B CN 111921714B
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- 239000000428 dust Substances 0.000 title claims abstract description 102
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003344 environmental pollutant Substances 0.000 claims description 25
- 231100000719 pollutant Toxicity 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 14
- 229910052573 porcelain Inorganic materials 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims description 5
- 230000005684 electric field Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 description 27
- 238000004140 cleaning Methods 0.000 description 13
- 230000002457 bidirectional effect Effects 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 3
- 238000004887 air purification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000012719 wet electrostatic precipitator Substances 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
-
- 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
-
- 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
- B03C3/763—Electricity supply or control systems therefor
-
- 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
- B03C3/78—Cleaning the electrodes by washing
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electrostatic Separation (AREA)
Abstract
The invention relates to an anti-return-air electrostatic precipitator which is provided with an electrostatic precipitator body, wherein the electrostatic precipitator body is of a horizontal structure, one side of the electrostatic precipitator body is provided with an air inlet, the other side of the electrostatic precipitator body is provided with an air outlet, and an anode dust collecting plate and a discharge cathode are arranged in the electrostatic precipitator body; the anode dust collecting plate and the discharge cathode are arranged in the electrostatic dust collector body; the anode dust collecting plate and the discharge cathode are arranged at intervals in parallel to the flowing direction of the airflow; the discharge cathode is a narrow plate-shaped electrode with a water drop-shaped cross section and comprises a discharge electrode arc end and a discharge electrode tip, the discharge electrode arc end faces the air inlet, the discharge electrode tip faces the air outlet, a groove corresponding to the discharge cathode in shape is formed in the anode dust collecting plate, and the discharge cathode extends into the groove but is not in contact with the groove, so that air flow in the electrostatic dust collector can only flow from the air inlet to the air outlet.
Description
Technical Field
The invention relates to an air purification device, in particular to an electrostatic dust collection device with an air return prevention function, and belongs to the field of electrostatic dust collection.
Background
An electrostatic dust removal purification system is an air purification system commonly used in industry and life, scientists have successfully tested the phenomena of discharge and electric wind in a large amount of smoke gas two hundred years ago, the purification and filtration effect of electrostatic force on dust-containing gas is verified before one hundred years ago, the process means of the treatment is applied to industry, and nowadays the electrostatic dust removal technology is widely applied to almost all industrial fields.
In the actual use process, because of the change of the air pressure inside and outside the electrostatic dust collector and the work (such as rapping or blowing and flushing) of the internal equipment of the electrostatic dust collector, the reverse flow of air flow is generated, namely, the air flow flows from the air outlet to the air inlet to generate return air, so that the serious reverse leakage of pollutants is caused.
Disclosure of Invention
Aiming at the problems in the background art, the invention designs an anti-return air electrostatic dust collector which does not need to be provided with a check valve and is connected with a plurality of electrostatic dust collectors in parallel, and the anti-return air electrostatic dust collector is provided with an electrostatic dust collector body, wherein the electrostatic dust collector body is of a horizontal structure, the electrostatic dust collector body is arranged on a horizontal plane through a support, one side of the electrostatic dust collector body is provided with an air inlet, the other side of the electrostatic dust collector body is provided with an air outlet, the lower part of the electrostatic dust collector body is provided with an ash bucket, and the upper part of the electrostatic dust collector body is provided with a high-pressure box; an electrostatic system and a rapping system are arranged in the electrostatic dust collector body; the electrostatic system comprises a high-voltage porcelain insulator, an electrode frame, an anode dust collecting plate and a discharge cathode; the high-voltage porcelain insulator is arranged in the high-voltage box and provides high voltage electricity for the anode dust collecting plate and the discharge cathode; the anode dust collecting plate and the discharge cathode are arranged in the electrostatic dust collector body and are suspended in the shell of the electrostatic dust collector body through the electrode frame; the anode dust collecting plate and the discharge cathode are arranged at intervals in parallel to the flowing direction of the airflow; the discharge cathode is a narrow plate-shaped electrode with a water drop-shaped cross section and comprises a discharge electrode arc end and a discharge electrode tip, the discharge electrode arc end faces the air inlet, and the discharge electrode tip faces the air outlet.
Further, the anode dust collecting plate is of a wide plate-shaped structure; the anode dust collecting plate is provided with a groove corresponding to the discharge cathode in shape, and the discharge cathode extends into the groove but is not in contact with the groove.
Further, a main air flow channel is formed between two adjacent anode dust collecting plates, and a plurality of discharge cathodes are arranged in the air flow direction in the main air flow channel; and the secondary airflow channel is formed between the arc end of the discharge electrode and the groove as well as between the side edge of the discharge cathode and the groove.
Furthermore, the tip of the discharge electrode is in a sawtooth structure in the length direction of the discharge cathode and is used for generating discharge corona and charging pollutant particles in the air flow.
When the electrostatic dust collector body works, air flow carries pollutant particles to enter the electrostatic dust collector body from the air inlet, when the pollutant particles pass through an electrostatic system, the pollutant particles are charged after corona discharge at the tip of a discharge electrode of a discharge cathode, then the pollutant particles move under the action of electric field force between an anode dust collecting plate and the discharge cathode and are adsorbed on the anode dust collecting plate, after the pollutant particles are deposited for a period of time, a rapping system is started to rap the pollutants deposited on the anode dust collecting plate and the discharge cathode, and the pollutants are collected in an ash bucket.
Furthermore, during normal operation, after the air flow enters from the air inlet, the air flow is divided into two parts at the arc end of the discharge electrode of the discharge cathode, wherein one part flows in a main air flow channel formed between the anode dust collecting plates, and the other part flows in a secondary air flow channel formed between the discharge cathode and the groove; because the arc end of the discharge electrode faces the air inlet, the tip of the discharge electrode faces the air outlet, and the groove corresponds to the discharge cathode in shape, at the moment, the air flow flowing direction in the main air flow channel is the same as the air flow flowing direction in the auxiliary air flow channel and flows towards the air outlet, therefore, the anode dust collecting plate and the discharge cathode structure can not obstruct the air flow when the air flow flows from the air inlet to the air outlet.
Furthermore, when the air return phenomenon occurs, the air flow can flow from the air outlet to the air inlet, the tip of the discharge electrode of the discharge cathode can divide the air flow into two parts, one part flows in a main air flow channel formed between the anode dust collecting plates, and the other part flows in a secondary air flow channel formed between the discharge cathode and the groove; because the tip of the discharge electrode faces the air outlet, the arc end of the discharge electrode faces the air inlet, and the shape of the groove corresponds to that of the discharge cathode, at the moment, under the guidance of the arc end of the discharge electrode and the arc section of the groove corresponding to the arc end of the discharge electrode, the flowing direction of the airflow in the auxiliary airflow channel is opposite to that of the airflow in the main airflow channel, therefore, the airflow in the auxiliary airflow channel can obstruct the flowing of the airflow in the main airflow channel, the return airflow can be basically reduced to zero after passing through the discharge cathodes and the grooves, and the control of the return air is realized.
Further, the electrostatic system is always in the electrified state when the electrostatic dust collector body works.
Has the advantages that: by adopting the unique structural design of the anode dust collecting plate and the discharge cathode, under the condition that a check valve is not installed, the airflow in the electrostatic dust collector can only flow from the air inlet to the air outlet, so that the problem of serious reverse leakage of pollutants caused by reverse filling airflow is solved, the number of the electrostatic dust collector and corresponding parts is reduced, the environmental protection cost is effectively reduced, the flow loss of the airflow in the normal process of passing through the electrostatic dust collector is reduced, and the working efficiency of the electrostatic dust collector is improved.
Drawings
FIG. 1 is a schematic view of the structure of an anti-return air electrostatic precipitator;
FIG. 2 is a schematic view of an electrode arrangement structure of the air return prevention electrostatic precipitator;
FIG. 3 is a schematic view of gas flow between electrodes;
FIG. 4 is a front view of a discharge cathode structure;
FIG. 5 is a schematic structural diagram of the anti-return air electrostatic precipitator with a cleaning device in a state of not being cleaned;
FIG. 6 is a schematic structural diagram of an anti-return air electrostatic precipitator with a cleaning device in a cleaning state;
FIG. 7 is a schematic view of the structure and operation of the flushing nozzle;
figure 8 is an alternative configuration of the flexible flush tube.
Description of the reference numerals:
1. an electrostatic precipitator body; 11. an air inlet; 12. an air outlet; 13. an ash hopper; 14. a support; 15. a high pressure tank; 16. a bidirectional booster pump;
2. an electrostatic system; 21. a high-voltage porcelain insulator; 22. an electrode holder; 23. an anode dust collecting plate; 231. a groove; 24. a discharge cathode; 241. arc ends of discharge electrodes; 242. a discharge electrode tip; 25. a main gas flow path; 26. a secondary airflow channel;
3. a rapping system;
4. elastically flushing the pipeline; 41. flushing the nozzle; 411. the upper jaw; 412. a lower jaw; 413. an elastic seat.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following specific examples.
Example one
Referring to the attached figure 1, the anti-return-air electrostatic precipitator is provided with an electrostatic precipitator body 1, wherein the electrostatic precipitator body 1 is a horizontal precipitator, the electrostatic precipitator body 1 is installed on a horizontal plane through a support 14, one side of the electrostatic precipitator body 1 is provided with an air inlet 11, the other side of the electrostatic precipitator body 1 is provided with an air outlet 12, the lower part of the electrostatic precipitator body 1 is provided with an ash bucket 13, and the upper part of the electrostatic precipitator body 1 is provided with a high-pressure tank 15; an electrostatic system 2 and a rapping system 3 are arranged in the electrostatic dust collector body 1, the rapping system 3 is electromagnetic or mechanical rapping and is used for rapping pollutant particles collected in the electrostatic system 2, and an ash hopper 13 is used for collecting dust which is rapped.
Referring to fig. 1 to 4, the electrostatic system 2 includes a high voltage porcelain bottle 21, an electrode holder 22, an anode dust collecting plate 23, and a discharge cathode 24; the high-voltage porcelain bottle 21 is arranged in the high-voltage box 15 and provides high voltage electricity for the anode dust collecting plate 23 and the discharge cathode 24; the anode dust collecting plate 23 and the discharge cathode 24 are arranged in the electrostatic precipitator body 1 and suspended in the shell of the electrostatic precipitator body 1 through the electrode frame 22; the anode dust collecting plate 23 and the discharge cathode 24 are arranged at intervals in parallel to the flow direction of the air stream; the discharge cathode 24 is a narrow plate electrode with a water drop-shaped cross section, and comprises a discharge electrode arc end 241 and a discharge electrode tip 242, the discharge electrode arc end 241 faces the air inlet 11, the discharge electrode tip 242 faces the air outlet 12, and the discharge electrode tip 242 is in a sawtooth structure in the length direction of the discharge cathode 24 and is used for generating discharge corona to charge pollutant particles in the air flow; the anode dust collecting plates 23 are in a wide plate-shaped structure, a main air flow channel 25 is formed between two adjacent anode dust collecting plates 23, and a plurality of discharge cathodes 24 are arranged in the air flow direction in the main air flow channel 25; the anode dust collecting plate 23 is provided with a groove 231 corresponding to the shape of the discharge cathode 24, the discharge cathode 24 extends into the groove 231 but does not contact the groove 231, and a secondary air flow path 26 is formed between the arc end 241 of the discharge electrode and the groove 231 and between the side edge of the discharge cathode 24 and the groove 231.
Referring to fig. 1-4, when the electrostatic precipitator body 1 is in operation, the air flow carries contaminant particles into the electrostatic precipitator body 1 from the air inlet 11, and when passing through the electrostatic system 2, the contaminant particles are charged after corona discharge through the discharge electrode tip 242 of the discharge cathode 24, and then move and adsorb to the anode dust collecting plate 23 under the action of the electric field force between the anode dust collecting plate 23 and the discharge cathode 24, and after the contaminant particles are deposited for a period of time, for example, when the secondary air flow channel 26 is about to be blocked, the rapping system 3 is started to rap the contaminants deposited on the anode dust collecting plate 23 and the discharge cathode 24 and collect them in the ash bucket 13.
The structure of the anode dust collecting plate 23 and the discharge cathode 24 is adopted, after the air flow enters from the air inlet 11, the air flow is divided into two parts at the arc end 241 of the discharge electrode of the discharge cathode 24, one part flows in the main air flow channel 25 formed between the anode dust collecting plates 23, and the other part flows in the auxiliary air flow channel 26 formed between the discharge cathode 24 and the groove 231; since the arc end 241 of the discharge electrode faces the air inlet 11, the tip 242 of the discharge electrode faces the air outlet 12, and the shape of the groove 231 corresponds to that of the discharge cathode 24, the air flow in the main air flow channel 25 and the air flow in the secondary air flow channel 26 are in the same direction and both flow toward the air outlet 12, and therefore, the anode dust collecting plate 23 and the discharge cathode 24 do not obstruct the air flow when the air flow flows from the air inlet 11 to the air outlet 12.
When the return air phenomenon occurs, the air flow flows from the air outlet 12 toward the air inlet 11, and the discharge electrode tips 242 of the discharge cathodes 24 also divide the air flow into two parts, one part flowing through the main air flow path 25 formed between the anode dust collecting plates 23 and the other part flowing through the sub air flow path 26 formed between the discharge cathodes 24 and the grooves 231; because the tip 242 of the discharge electrode faces the air outlet 12, the arc end 241 of the discharge electrode faces the air inlet 11, and the shape of the groove 231 corresponds to that of the discharge cathode 24, at this time, under the guidance of the arc end 241 of the discharge electrode and the arc segment of the groove 231 corresponding to the arc end 241 of the discharge electrode, the direction of the airflow in the secondary airflow channel 26 is opposite to that of the airflow in the primary airflow channel 25, so the airflow in the secondary airflow channel 26 can obstruct the airflow in the primary airflow channel 25, and the return airflow can be substantially reduced to zero after passing through the discharge cathodes 24 and the grooves 231, thereby realizing the control of the return airflow. The structure function is especially suitable for the working process of the rapping system 3, at the moment, if the return air formed by rapping can cause the serious reverse leakage of pollutants, the prior method is to seal the air inlet 11 for rapping, but the design does not need to seal the air inlet 11, the rapping can be carried out at any working period of the electrostatic precipitator body 1, the problem that a single electrostatic precipitator can not continuously work all the time is effectively solved, and the working efficiency of the electrostatic precipitator is improved.
Example two
Referring to fig. 5-7, a low wind resistance anti-return air wet electrostatic precipitator, on the basis of the first embodiment, the rapping system 3 is removed, meanwhile, a bidirectional booster pump 16 is installed on the upper portion of the electrostatic precipitator body 1, one end of the bidirectional booster pump 16 is connected to an external cleaning solution supply system, the other end passes through the upper shell of the electrostatic precipitator body 1 and is connected to an elastic flushing pipe 4 arranged on the upper portion in the electrostatic precipitator body 1, flushing nozzles 41 are uniformly arranged on the elastic flushing pipe 4, the elastic flushing pipe 4 is provided with water outlet openings at positions corresponding to the flushing nozzles 41, the flushing nozzles 41 comprise an upper jaw 411, a lower jaw 412 and an elastic seat 413, the upper jaw 411 and the lower jaw 412 are movably installed on the elastic flushing pipe 4 through the respective corresponding elastic seats 413, and the upper jaw 411 and the lower jaw 412 are in a closed state under the action of the elastic seats 413 when water is not sprayed.
The elastic flushing pipe 4 is in a spiral tightening state when not performing cleaning work, and after the electrostatic system 2 in the electrostatic precipitator body 1 works for a period of time, a large amount of pollutant particles are deposited on the anode dust collecting plate 23 and the discharge cathode 24, for example, when the auxiliary air flow channel 26 is about to be blocked, a cleaning process is started; specifically, the power supply of the anode dust collecting plate 23 and the discharge cathode 24 of the area to be cleaned is turned off, the bidirectional booster pump 16 is started to rotate forward to inject high-pressure water into the elastic flushing pipeline 4, the elastic flushing pipeline 4 is not in a spiral tightening state under the action of water pressure, the elastic flushing pipeline 4 extends towards the bottom in the electrostatic precipitator body 1 and extends into a position between electrodes, when the elastic flushing pipeline 4 is completely unfolded, the high-pressure water in the elastic flushing pipeline 4 impacts the upper jaw 411 and the lower jaw 412 of the flushing nozzle 41 through the water outlet opening of the corresponding flushing nozzle 41 and opens the flushing nozzle 41, then the flushing nozzle 41 sprays high-pressure flushing water flow to impact and clean pollutant particles deposited on the anode dust collecting plate 23 and the discharge cathode 24, and the pollutant particles are cleaned and fall into the ash bucket 13 under the impact of the water flow; after the water spraying cleaning of the anode dust collecting plate 23 and the discharge cathode 24 is completed, the bi-directional booster pump 16 is controlled to reversely rotate to suck the residual water in the elastic flushing pipe 4 back to the external cleaning liquid supply system, at this time, due to the disappearance of the water pressure, the upper jaw 411 and the lower jaw 412 are restored to the closed state under the action of the elastic seat 413, at the same time, due to the suck-back action of the bi-directional booster pump 16, the auxiliary elastic flushing pipe 4 is retracted to the spirally tightened state, and then the bi-directional booster pump 16 is closed, at this time, the elastic flushing pipe 4 is kept in the spirally tightened state until the next cleaning process is started.
The elastic flushing pipeline 4 can be made of metal or high polymer materials with good rebound and tensile properties, so that stress deformation, fatigue and breakage are avoided after repeated rebound and tensile motions, and a rebound structure, such as a spring leaf and the like, can be added outside the pipeline made of high polymers to assist in rebound. The flexible flushing pipe 4 can also be arranged in a retracted state without cleaning as shown in fig. 8.
In the cleaning process, the discharge cathode 24 is a narrow plate-shaped electrode with a water drop-shaped cross section and comprises a discharge electrode arc end 241 and a discharge electrode tip 242, the discharge electrode arc end 241 faces the air inlet 11, the discharge electrode tip 242 faces the air outlet 12, and the discharge electrode tip 242 is in a sawtooth structure in the length direction of the discharge cathode 24 and is used for generating discharge corona and charging pollutant particles in the air flow; the anode dust collecting plates 23 are in a wide plate-shaped structure, a main air flow channel 25 is formed between two adjacent anode dust collecting plates 23, and a plurality of discharge cathodes 24 are arranged in the air flow direction in the main air flow channel 25; the anode dust collecting plate 23 is provided with a groove 231 corresponding to the shape of the discharge cathode 24, the discharge cathode 24 extends into the groove 231 but does not contact with the groove 231, the arc end 241 of the discharge electrode and the groove 231 and a secondary airflow channel 26' are formed between the side edge of the discharge cathode 24 and the groove 231, so that the airflow and the water mist generated by the high-pressure water spray during cleaning can be divided into two parts, when the electrode plates flow towards the air inlet 11, the discharge electrode tip 242 of the discharge cathode 24 can also divide the airflow into two parts, one part flows in the primary airflow channel 25 formed between the anode dust collecting plate 23, and the other part flows in the secondary airflow channel 26 formed between the discharge cathode 24 and the groove 231; since the tip 242 of the discharge electrode faces the air outlet 12, the arc end 241 of the discharge electrode faces the air inlet 11, and the shape of the groove 231 corresponds to that of the discharge cathode 24, at this time, under the guidance of the arc end 241 of the discharge electrode and the arc segment of the groove 231 corresponding to the arc end 241 of the discharge electrode, the direction of the water flow in the secondary air flow channel 26 is opposite to the direction of the water flow in the primary air flow channel 25, so that the water flow in the secondary air flow channel 26 obstructs the water flow in the primary air flow channel 25, and the return air flow is substantially reduced to zero after passing through the plurality of discharge cathodes 24 and the grooves 231. The structure can effectively prevent the problem that air flow and water mist generated by high-pressure water spraying of the wet electrostatic dust collector are reversely leaked to the previous stage from the air inlet 11 in the water spraying and cleaning process, and extra control parts such as a sealing valve and the like do not need to be arranged on the air inlet 11.
The technical solutions in the above embodiments have clearly and completely described the contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (6)
1. An anti-return-air electrostatic dust collector is provided with an electrostatic dust collector body (1), the electrostatic dust collector body is of a horizontal structure, the electrostatic dust collector body (1) is installed on a horizontal plane through a support (14), an air inlet (11) is formed in one side of the electrostatic dust collector body (1), an air outlet (12) is formed in the other side of the electrostatic dust collector body (1), an ash bucket (13) is arranged on the lower portion of the electrostatic dust collector body (1), and a high-pressure box (15) is arranged on the upper portion of the electrostatic dust collector body (1); an electrostatic system (2) and a rapping system (3) are arranged in the electrostatic dust collector body (1); the method is characterized in that: the electrostatic system (2) comprises a high-voltage porcelain insulator (21), an electrode frame (22), an anode dust collecting plate (23) and a discharge cathode (24); the high-voltage porcelain insulator (21) is arranged in the high-voltage box (15) and provides high-voltage electricity for the anode dust collecting plate (23) and the discharge cathode (24); the anode dust collecting plate (23) and the discharge cathode (24) are arranged in the electrostatic dust collector body (1) and are suspended in the shell of the electrostatic dust collector body (1) through the electrode frame (22); the anode dust collecting plate (23) and the discharge cathode (24) are arranged at intervals in parallel to the flow direction of the air flow; the discharge cathode (24) is a narrow plate electrode with a water drop-shaped cross section and comprises a discharge electrode arc end (241) and a discharge electrode tip (242), the discharge electrode arc end (241) faces the air inlet (11), and the discharge electrode tip (242) faces the air outlet (12); the anode dust collecting plate (23) is of a wide plate-shaped structure; the anode dust collecting plate (23) is provided with a groove (231) corresponding to the shape of the discharge cathode (24), and the discharge cathode (24) extends into the groove (231) but is not contacted with the groove (231); a main air flow channel (25) is formed between two adjacent anode dust collecting plates (23), and a plurality of discharge cathodes (24) are arranged in the air flow direction in the main air flow channel (25); and a secondary airflow channel (26) is formed between the arc end (241) of the discharge electrode and the groove (231) and between the side edge of the discharge cathode (24) and the groove (231).
2. The return air prevention electrostatic precipitator according to claim 1, wherein: the discharge electrode tip (242) is in a sawtooth structure in the length direction of the discharge cathode (24) and is used for generating discharge corona and charging pollutant particles in the air flow.
3. A return air prevention electrostatic precipitator control method as defined in any one of claims 1-2, wherein: when the electrostatic dust collector body works, the air flow carries pollutant particles to enter the electrostatic dust collector body from the air inlet, when the pollutant particles pass through the electrostatic system, the pollutant particles are charged after corona discharge at the discharge electrode tip of the discharge cathode, then the pollutant particles move under the action of electric field force between the anode dust collecting plate and the discharge cathode and are adsorbed on the anode dust collecting plate, after the pollutant particles are deposited for a period of time, the rapping system is started to rap the pollutant deposited on the anode dust collecting plate and the discharge cathode, and the pollutant particles are collected in the ash bucket.
4. The return air prevention electrostatic precipitator control method according to claim 3, wherein: during normal operation, after the air flow enters from the air inlet, the air flow is divided into two parts at the arc end of the discharge electrode of the discharge cathode, wherein one part flows in a main air flow channel formed between the anode dust collecting plates, and the other part flows in an auxiliary air flow channel formed between the discharge cathode and the groove; because the arc end of the discharge electrode faces the air inlet, the tip of the discharge electrode faces the air outlet, and the groove corresponds to the discharge cathode in shape, at the moment, the air flow flowing direction in the main air flow channel is the same as the air flow flowing direction in the auxiliary air flow channel and flows towards the air outlet, therefore, the anode dust collecting plate and the discharge cathode structure can not obstruct the air flow when the air flow flows from the air inlet to the air outlet.
5. The control method of the return air prevention electrostatic precipitator according to claim 3, wherein: when the air return phenomenon occurs, the air flow flows from the air outlet to the air inlet, the tip of the discharge electrode of the discharge cathode divides the air flow into two parts, one part flows in a main air flow channel formed between the anode dust collecting plates, and the other part flows in an auxiliary air flow channel formed between the discharge cathode and the groove; because the tip of the discharge electrode faces the air outlet, the arc end of the discharge electrode faces the air inlet, and the shape of the groove corresponds to that of the discharge cathode, at the moment, under the guidance of the arc end of the discharge electrode and the arc section of the groove corresponding to the arc end of the discharge electrode, the flowing direction of the airflow in the auxiliary airflow channel is opposite to that of the airflow in the main airflow channel, therefore, the airflow in the auxiliary airflow channel can obstruct the flowing of the airflow in the main airflow channel, the return airflow can be basically reduced to zero after passing through the discharge cathodes and the grooves, and the control of the return air is realized.
6. The control method of the return air prevention electrostatic precipitator according to claim 3, wherein: the electrostatic system is always in a power-on state when the electrostatic dust collector body works.
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