CN2740295Y - Electric dust collector with dust coagulator by bipolar corona discharge - Google Patents
Electric dust collector with dust coagulator by bipolar corona discharge Download PDFInfo
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- CN2740295Y CN2740295Y CN 200420090788 CN200420090788U CN2740295Y CN 2740295 Y CN2740295 Y CN 2740295Y CN 200420090788 CN200420090788 CN 200420090788 CN 200420090788 U CN200420090788 U CN 200420090788U CN 2740295 Y CN2740295 Y CN 2740295Y
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Abstract
The utility model discloses an electric dust collector with a dust coagulator by bipolar corona discharge, which is used for the technical field of smoke dust collection and comprises a flue and an electric dust collector, wherein the flue is arranged at the front part of the electric dust collector, and at lease one set of positive corona discharging electrodes and at least one set of negative corona discharging electrodes are assembled in the flue and are respectively connected with the high-voltage output end and the low-voltage output end of a high-voltage power supply. Dusty smoke in the electric dust collector of the utility model firstly passes through a positive corona discharging zone and a negative corona discharging zone so that dust particles in the smoke are carried with positive electric charge and negative electric charge and then are coagulated and gathered with each other to large granules, and then the dusty smoke is inputted to the electric dust collector for electric dust collection so that the dust collection efficiency is enhanced. A dust coagulator by bipolar corona discharge adopts a single high-voltage power supply and simultaneously generates positive corona discharge and negative corona discharge, the electric charge is coagulated in the same chamber, and therefore, the utility model has the advantages of low cost and high charge efficiency.
Description
Technical field
The invention belongs to the flue gas ash removal technical field, relate in particular to a kind of equipment that purifies by electric cleaner again behind the flue dust coalescence that makes by corona discharge.
Background technology
Contain the dust or the flue dust of a large amount of microns and sub-micron in the flue gas, these fine grits can directly enter people's respiratory system, have a strong impact on the healthy of people.To the dust or the flue dust of this micron and sub-micron, the purification efficiency of general electric cleaner is very low, is difficult to reach the particulate emission standards of the relevant PM2.5 of country.
For improving capacity gauge, mainly adopt the coalescence technology that flue gas is carried out preliminary treatment at present to fine flue dust.The coalescence technology of being reported at present has chemical coalescence and physics coalescence two big classes.The physics coalescence mainly is to utilize extra electric field, magnetic field, and sound field, gravitational field or centrifugal force field etc. increase average grain diameter tiny flue dust coalescence, utilize electric precipitation to collect again; The chemistry coalescence is then introduced chemical substance, impels the flue dust coalescence.Because these coalescence technical costs height, operation is complicated, in fact seldom has factory to adopt the coalescence technology that power plant's sub-micro end flue dust is administered.
Australia INDIGO company discloses a kind of method and apparatus of aggregated particle in publication number is the application for a patent for invention of CN1390157A, this method has adopted the pre-charged flue dust coalescence technology of a kind of bipolarity, adopt positive and negative two high voltage sourcies, the charge electric appliance that flue gas is divided into positive and negative charged intersection, mix flue gas after charged again in a coalescence chamber, make the dust coalescence of sub-micron in the flue gas, in follow-up electric cleaner, collect.Though the coalescence effect is obvious, equipment investment is big, and the coalescence chamber separately makes overall volume increase with charged chamber.Because the positive carry electric channel adopts grounded plate electrode that flue gas is divided into two parts, most of discharge current flows directly into grounded plate electrode, inefficiency, and energy consumption is higher.
Summary of the invention
What the invention provides a kind of high efficiency low energy consumption has a bipolar corona discharge soot coalescence electric dust-removing equipment, purifies by electric precipitation after the dust of micron in the flue gas and sub-micron or flue dust are handled again, and installation cost is low, the efficiency of dust collection height.
A kind of electric dust-removing equipment that has bipolar corona discharge soot coalescence device, comprise flue and electric cleaner, flue entrance is communicated with boiler flue gas outlet, flue outlet is communicated with the electric cleaner inlet, at least one group of positive corona sparking electrode of flue mounted inside and at least one group of negative corona discharge electrode, positive and negative sparking electrode link to each other with the output low-pressure end with the output high-pressure side of high voltage source respectively.
The unipolarity high voltage source that described bipolar corona discharge power supply is a positive or negative polarity, one group of electrode in the plus or minus corona discharge electrode connects with the output of high voltage source, and another organizes electrode grounding.
Described bipolar corona discharge power supply is the total bipolarity high voltage source of positive-negative polarity, and positive and negative corona electrode links to each other with two outputs of bipolar power supply respectively.
The power supply architecture of described high voltage source adopts halfwave rectifier bipolar power supply, single-phase full wave rectification bipolar power supply, three phase full wave rectification bipolar power supply, high-frequency high-voltage direct-current power supply or high-voltage pulse power source.
The electrode structure of described positive corona sparking electrode and negative corona discharge electrode is round wire, acupuncture line, angle steel prickle wire, jaggies, astroid, turn round in fried dough twist astroid or the R-S line any one.
The profile of described flue is circular or square.
Described plus or minus corona discharge electrode is installed in the flue center, and earth electrode is installed in around the flue and ground connection.
Described earth electrode is installed respectively around flue center and the flue, and the plus or minus corona discharge electrode is installed between the two winding ground electrodes.
Described positive corona sparking electrode and negative corona discharge electrode are divided into several hexagonal cell with flue, and two arrays of electrodes lays respectively at each hexagonal summit and center, and parallel or vertical with the flow of flue gas direction.
Ash-laden gas is the positive and negative corona discharge region of elder generation's process in flue, the positive negative corona discharge that utilizes bipolar corona discharge equipment to produce makes the dirt particle in the flue gas charged, the different electrical micronic dusts of band become larger particles because the mutual coalescence of electrostatic interaction is assembled, and import electric cleaner again and carry out electric precipitation.
Positive negative corona discharge produced simultaneously when the ash-laden gas that boiler is got rid of passed through bipolar corona discharge soot coalescence device, flue dust is through after the positive and negative sided corona treatment, part flue dust lotus positive electricity, part flue dust bear electricity, under the effect of electrostatic force, positive and negative charged flue dust coalescence, increase particle diameter, the charged coalescence of micronic dust in the flue gas is separated in electric cleaner after assembling, and discharges from electric duster ash bucket, and purified gas is discharged from chimney.Processing helps follow-up electrostatic precipitation through the flue dust coalescence, has improved efficiency of dust collection.
The shape of positive corona sparking electrode and negative corona discharge electrode can be identical, also can take different shapes respectively to improve discharge capability and efficient.The different position of passing through of positive corona sparking electrode and negative corona discharge electrode is provided with simultaneously, so that can improve charged coalescence efficient under the excessive situation of flue gas flow rate.
The bipolar corona discharge coalescence device that the utility model adopts uses the separate unit high voltage source, and positive negative corona discharge produces simultaneously, and flue gas does not need the shunting, and charged coalescence carries out in same chamber, and does not have the earth plate ground electrode, the low and charged efficient height of installation cost.
Description of drawings
Fig. 1 is for adopting the boiler flue gas purification schematic flow sheet of the utility model device;
Fig. 2 is when adopting the unipolarity power supply, bipolar corona discharge coalescence device schematic diagram;
Fig. 3 is when adopting bipolar power supply, bipolar corona discharge coalescence device schematic diagram;
Fig. 4 is when adopting the positive polarity power supply, the bipolar corona discharge schematic diagram;
Fig. 5 is when adopting the negative polarity power supply, the bipolar corona discharge schematic diagram;
Fig. 6 is when adopting the halfwave rectifier bipolar power supply, bipolar corona discharge coalescence device schematic diagram;
Fig. 7 is when adopting single-phase full wave rectification bipolar power supply, bipolar corona discharge coalescence device schematic diagram;
Fig. 8 is when adopting the three phase full wave rectification bipolar power supply, bipolar corona discharge coalescence device schematic diagram;
Fig. 9 is that the structure of positive and negative corona discharge electrode is provided with schematic diagram in the circular flue when adopting the unipolarity power supply;
Figure 10 is that the another kind of structure of positive and negative corona discharge electrode is provided with schematic diagram in the circular flue when adopting the unipolarity power supply;
Figure 11 is that another structure of positive and negative corona discharge electrode is provided with schematic diagram in the circular flue when adopting the unipolarity power supply;
Structure was provided with schematic diagram when Figure 12 was sparking electrode and flue gas parallel arrangement.
Wherein, the 1-boiler, 2-bipolar corona discharge soot coalescence device, 3-high voltage source, the 4-electric cleaner, 5-electric cleaner power supply, 6-electric duster ash bucket, the 7-chimney of discharging fume, the high voltage input terminal of 8-bipolar corona discharge soot coalescence device, 9-unipolarity power supply power supply, or connect the corona discharge electrode of high-pressure side during the bipolar power supply power supply, connect the corona discharge electrode of earth terminal during the power supply of 10-unipolarity power supply, 11-bipolar corona discharge power supply, 12-negative polarity corona discharge electrode, 13-positive polarity corona discharge electrode, 14-single-phase high voltage transformer, the 15-commutation diode, the 16-RL buffer, 17-full-bridge rectifier, 18-three-phase full-bridge rectifier, 19-three-phase high-voltage transformer, the 20-three-phase reactor, 21-three phase semiconductor switching device group, 22-flow of flue gas direction
The specific embodiment
As shown in Figure 1, bipolar corona discharge soot coalescence device 2 is installed in the flue in electric cleaner 4 the place aheads, the ash-laden gas that boiler 1 is got rid of is through being located at the bipolar corona discharge soot coalescence device 2 on the flue, micronic dust in the flue gas is charged under the high-voltage corona effect, part flue dust lotus positive electricity, and another part bear, because the flue gas wind speed is generally between 10-20m/s, flue dust in bipolar corona discharge soot coalescence device 2 is because electrostatic interaction carries out coalescence, the dustshot subnumber is reduced, the flue dust particle diameter increases, but in device 2, need not collect, all flue dust are collected in follow-up electric cleaner, the pre-charged efficiency of dust collection that improves follow-up electric cleaner of flue dust.Be separated in electric cleaner 4 and discharge from electric duster ash bucket 6, the waste gas after the purification is discharged from chimney 7.Wherein, bipolar corona discharge soot coalescence device 2 is by high voltage source 3 power supplies, and electric cleaner 4 is by 5 power supplies of electric cleaner power supply.
Electric cleaner 4 can be the dry electric precipitation device, also can be wet electrical dust precipitator.
As shown in Figure 2, when high voltage source 3 was unipolarity separate unit power supply, sparking electrode 9 linked to each other earth electrode 10 ground connection by charge electric appliance high voltage input terminal 8 with high voltage source 3.Along with 3 alive risings of power supply, the electric-field intensity that sparking electrode 9 and earth electrode are 10 increases, and when surface electric field intensity reaches about 30kv/cm, produces corona discharge.When added voltage made two electrode surface place field intensity greater than 30kv/cm, positive negative corona discharge produced simultaneously, and sparking electrode 9 produces the positive corona discharge, and earth electrode 10 produces negative corona discharge.Interelectrode on the same group distance is generally between 20mm-200mm, and the interelectrode distance of heteropole is between 50mm-300mm, and voltage is generally between ± 20-± 150kV.
As shown in Figure 3, when high voltage source 3 is the separate unit bipolar power supply, all sparking electrodes 9 are divided into two groups, one winding positive high voltage, another winding negative high voltage output, when institute's making alive made the field intensity of two groups of electrode surfaces reach about 30kv/cm, positive negative corona discharge produced simultaneously, the identical discharge current of positive and negative two utmost points output this moment.Generating positive and negative voltage can be identical, also can be different.
When high voltage source 3 is separate unit positive polarity power supply, the corona discharge schematic diagram as shown in Figure 4, positive polarity corona discharge electrode 13 connects the positive high voltage output of power supply 3, negative polarity corona discharge electrode 12 ground connection.Positive polarity corona discharge electrode 13 produces the positive corona discharge, and negative polarity corona discharge electrode 12 produces negative corona discharge.The positive corona discharge is streamer-discahrge, and negative corona discharge is glow discharge.
When high voltage source 3 is separate unit negative polarity power supply, the corona discharge schematic diagram as shown in Figure 5, negative polarity corona discharge electrode 12 connects the negative high voltage output of power supply 3, positive polarity corona discharge electrode 13 ground connection.Positive polarity corona discharge electrode 13 produces the positive corona discharge, and negative polarity corona discharge electrode 12 produces negative corona discharge.
As shown in Figure 6, when the power supply architecture of high voltage source 3 adopted the single phase half wave rectification structure, the secondary positive high voltage output of one-way high-pressure transformer 14 linked to each other with positive polarity corona discharge electrode 13 with RL buffer 16 by commutation diode 15; The secondary negative high voltage output of one-way high-pressure transformer 14 links to each other with negative polarity corona discharge electrode 12 with RL buffer 16 by commutation diode 15.Transformer 14 can be powered with the various Switching Power Supplies of band semiconductor switch device, and can control optimization according to the characteristic of output current voltage.
As shown in Figure 7, when the power supply architecture of high voltage source 3 adopts the single-phase full wave rectifier structure, the secondary of one-way high-pressure transformer 14 connects with two groups of full-bridge rectifiers 17, the output of generation positive or negative high voltage, and be connected with negative polarity corona discharge electrode 12 with positive polarity corona discharge electrode 13 with RL buffer 16 by commutation diode 15 respectively.The secondary of high-tension transformer 14 also can only adopt one group of full-bridge rectification to export positive or negative high voltage simultaneously.
As shown in Figure 8, when the power supply architecture of high voltage source 3 adopts the three phase semiconductor construction of switch, Switching Power Supply is connected with three-phase high-voltage transformer 19 with three-phase reactor 20 by three phase semiconductor switching device group 21, secondary and the three-phase full-bridge rectifier 18 of transformer 19 is connected, the generation positive or negative high voltage is exported, and is connected with negative polarity corona discharge electrode 12 with positive polarity corona discharge electrode 13 respectively by RL buffer 16.
The profile of the outside flue of bipolar corona discharge soot coalescence device 2 can be circle, also can be square.
As shown in Figure 9, when high voltage source 3 adopts the unipolarity high voltage source, a kind of mounting means of sparking electrode in circular flue.Plus or minus corona discharge high-field electrode 9 is installed in the flue center, and earth electrode 10 is housed around the flue.When adopting the positive high voltage power supply, the electrode 9 at flue center is the positive corona discharge, and earth electrode 10 is a negative corona discharge, and when adopting negative high voltage power source, the electrode 9 at flue center is a negative corona discharge, and earth electrode 10 is the positive corona discharge.
When Figure 10 is high voltage source 3 employing unipolarity high voltage sourcies, the another kind of mounting means of sparking electrode in circular flue.This moment, the flue center was an earth electrode 10, and earth electrode 10 also is housed on the flue, and plus or minus corona discharge high-field electrode 9 is contained between two earth electrodes, can adopt the positive high voltage power supply, also can adopt negative high voltage power source.
When the flue gas throughput was big, avaivable electrode was divided into some hexagonal cell with garden shape flue, and as shown in figure 11, sparking electrode is divided into two groups, lays respectively at hexagonal summit and center, and one group of electrode is communicated with back ground connection.
Electrode setting in the bipolar corona discharge soot coalescence device 2 can be arranged in parallel with the flue gas direction or vertical setting.
As shown in figure 12, the flue of bipolar corona discharge soot coalescence device 2 is square, and sparking electrode 9 is parallel arrangement with flow of flue gas direction 22, and high voltage source 3 adopts bipolar corona discharge power supply 11, and high voltage input terminal 8 is connected with sparking electrode 9.
Claims (9)
1. electric dust-removing equipment that has bipolar corona discharge soot coalescence device, comprise flue and electric cleaner, flue entrance is communicated with boiler flue gas outlet, flue outlet is communicated with the electric cleaner inlet, it is characterized in that: at least one group of positive corona sparking electrode of flue mounted inside and at least one group of negative corona discharge electrode, positive and negative corona discharge electrode link to each other with the output low-pressure end with the output high-pressure side of high voltage source respectively.
2. the electric dust-removing equipment that has bipolar corona discharge soot coalescence device according to claim 1, it is characterized in that: the unipolarity high voltage source that described bipolar corona discharge power supply is a positive or negative polarity, one group of electrode in the plus or minus corona discharge electrode connects with the output of high voltage source, and another organizes electrode grounding.
3. the electric dust-removing equipment that has bipolar corona discharge soot coalescence device according to claim 1, it is characterized in that: described bipolar corona discharge power supply is the total bipolarity high voltage source of positive-negative polarity, and positive and negative corona electrode links to each other with two outputs of bipolar power supply respectively.
4. the electric dust-removing equipment that has bipolar corona discharge soot coalescence device according to claim 1 is characterized in that: the power supply architecture of described high voltage source adopts halfwave rectifier bipolar power supply, single-phase full wave rectification bipolar power supply, three phase full wave rectification bipolar power supply, high-frequency high-voltage direct-current power supply or high-voltage pulse power source.
5. the electric dust-removing equipment that has bipolar corona discharge soot coalescence device according to claim 1 is characterized in that: the structure of described corona wire is round wire, acupuncture line, angle steel prickle wire, jaggies, astroid, turn round in fried dough twist astroid or the R-S line any one.
6. the electric dust-removing equipment that has bipolar corona discharge soot coalescence device according to claim 1 is characterized in that: the profile of described flue is for circular or square.
7. the electric dust-removing equipment that has bipolar corona discharge soot coalescence device according to claim 2 is characterized in that: described plus or minus corona discharge electrode is installed in the flue center, and earth electrode is installed in around the flue and ground connection.
8. the electric dust-removing equipment that has bipolar corona discharge soot coalescence device according to claim 2 is characterized in that: described earth electrode is installed respectively around flue center and the flue, and the plus or minus corona discharge electrode is installed between the two winding ground electrodes.
9. according to claim 2 or the 3 described electric dust-removing equipments that have bipolar corona discharge soot coalescence device, it is characterized in that: described positive corona sparking electrode and negative corona discharge electrode are divided into several hexagonal cell with flue, two arrays of electrodes lays respectively at each hexagonal summit and center, and parallel or vertical with the flow of flue gas direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420090788 CN2740295Y (en) | 2004-10-09 | 2004-10-09 | Electric dust collector with dust coagulator by bipolar corona discharge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420090788 CN2740295Y (en) | 2004-10-09 | 2004-10-09 | Electric dust collector with dust coagulator by bipolar corona discharge |
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| CN2740295Y true CN2740295Y (en) | 2005-11-16 |
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| CN 200420090788 Expired - Fee Related CN2740295Y (en) | 2004-10-09 | 2004-10-09 | Electric dust collector with dust coagulator by bipolar corona discharge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101940979A (en) * | 2010-09-01 | 2011-01-12 | 清华大学 | Partition-free bipolar electrostatic particle coagulator |
| CN102836779A (en) * | 2011-06-24 | 2012-12-26 | 宝山钢铁股份有限公司 | Fine particle removal method and device |
| CN103018145A (en) * | 2012-10-12 | 2013-04-03 | 桂林电子科技大学 | Novel real-time PM2.5 (particulate matter 2.5) mass concentration monitoring device and monitoring method |
| CN104174279A (en) * | 2014-08-12 | 2014-12-03 | 江苏大学 | Bipolar corona discharge flue gas desulfurization and dust removal method and equipment |
-
2004
- 2004-10-09 CN CN 200420090788 patent/CN2740295Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101940979A (en) * | 2010-09-01 | 2011-01-12 | 清华大学 | Partition-free bipolar electrostatic particle coagulator |
| CN102836779A (en) * | 2011-06-24 | 2012-12-26 | 宝山钢铁股份有限公司 | Fine particle removal method and device |
| CN102836779B (en) * | 2011-06-24 | 2016-01-20 | 宝山钢铁股份有限公司 | A kind of minimizing technology of fine particle and device |
| CN103018145A (en) * | 2012-10-12 | 2013-04-03 | 桂林电子科技大学 | Novel real-time PM2.5 (particulate matter 2.5) mass concentration monitoring device and monitoring method |
| CN104174279A (en) * | 2014-08-12 | 2014-12-03 | 江苏大学 | Bipolar corona discharge flue gas desulfurization and dust removal method and equipment |
| CN104174279B (en) * | 2014-08-12 | 2016-01-20 | 江苏大学 | A kind of bipolar corona discharge FGD dust collection method and equipment thereof |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |