CN110662337A - Pulse corona plasma high-voltage power supply - Google Patents
Pulse corona plasma high-voltage power supply Download PDFInfo
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- CN110662337A CN110662337A CN201910979485.6A CN201910979485A CN110662337A CN 110662337 A CN110662337 A CN 110662337A CN 201910979485 A CN201910979485 A CN 201910979485A CN 110662337 A CN110662337 A CN 110662337A
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- 230000006835 compression Effects 0.000 claims abstract description 29
- 238000007906 compression Methods 0.000 claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 238000004146 energy storage Methods 0.000 claims abstract description 15
- 230000017525 heat dissipation Effects 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 11
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000581 reactive spray deposition Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Treating Waste Gases (AREA)
- Plasma Technology (AREA)
Abstract
The invention provides a pulse corona plasma high-voltage power supply which comprises a high-voltage pulse power supply part and a multi-stage magnetic compression device, wherein the high-voltage pulse power supply part comprises a charger, a high-voltage energy storage capacitor, a series RSD switch, a magnetic saturation switch and a pulse transformer which are sequentially connected in series to form a loop; the charger is connected with the high-voltage energy storage capacitor in parallel and is used for charging the high-voltage energy storage capacitor; the multi-stage magnetic compression device is connected with the pulse transformer, and the output end of the multi-stage magnetic compression device is used as the output end of the pulse corona plasma high-voltage power supply. The invention eliminates the dynamic power consumption when the RSD is switched on, and can improve the reliability of the series RSD switch under the working state of high repetition frequency and large current. The high-voltage power supply of the pulse corona plasma of the invention processes low-concentration SO2And NOx, the catalyst still has good removal effect.
Description
Technical Field
The invention belongs to the field of plasma power supply design, and particularly relates to a pulse corona plasma high-voltage power supply.
Background
Along with the increasing of installed capacity of thermal power in recent years, the total amount of discharged pollutants increases and causes great pressure on the atmospheric environment, and the pollutant discharge requirements of coal-fired units in important control areas need to be controlled as follows: the smoke concentration is less than or equal to 20mg/Nm3；SO2The concentration is less than or equal to 50mg/Nm3(ii) a NOx concentration is less than or equal to 100mg/Nm3(ii) a Mercury and its compound less than or equal to 0.03mg/Nm3。
At present, desulfurization (SO)2) SO as to adopt an absorbent to absorb SO in the flue gas2The absorption treatment technology is mainly divided into a wet desulfurization technology and a dry desulfurization technology. Wet desulphurization technique packageIncluding limestone-gypsum process, seawater process, ammonia process, dibasic process, etc.; the dry method includes a furnace calcium spraying method, a circulating fluidized bed method, a spray drying method and the like.
The technologies adopted for denitration (NOx) mainly include low nitrogen combustion technology (LNB) and furnace air staging technology (OFA), and selective non-catalytic reduction (SNCR) and Selective Catalytic Reduction (SCR).
The technology only treats single pollutant in a targeted manner, an absorbent is needed, and the system has the advantages of complex process, huge structure and high operation and maintenance cost. Meanwhile, the technology is used for treating low-concentration SO2And poor NOx removal, ultra clean emissions are difficult to achieve. The high-gradient high-voltage pulse plasma technology can be adopted to simultaneously treat SO2And NOx, and to low concentrations of SO2And NOx still have good scavenging properties. In addition, the pulse plasma technology has made obvious progress in other waste treatment (VOCs, PAHs, mercury, special polluted water, etc.).
With the rapid development of technologies such as high-power high-voltage power electronic devices (such as IGBTs and RSDs) and high-squareness ratio and low-coercivity magnetic materials (such as nanocrystals), the conditions for developing industrial high-gradient high-voltage pulse plasma power supplies are met. At present, research and development work for plasma power supplies at home and abroad is carried out. The techniques for generating plasma are mainly divided into two types: one kind is to adopt the high frequency (above 10 kHz) alternating voltage to form the plasma, it is formed by high frequency alternating current plasma power and dielectric Barrier Discharge (BDB) reactor, its characteristic is: the power supply is easy to manufacture and low in cost, but the reactor has a complex structure and high requirement on cleanliness and is not resistant to dust, so that the reactor is not suitable for occasions with dust, such as coal-fired power plants. The second type adopts high-voltage pulse (500 ns level) voltage to generate plasma, and is composed of a pulse plasma high-voltage power supply and a reactor (with an electric dust removal structure), so that the power supply is difficult to manufacture, is dust-resistant, can be used for desulfurization and denitrification of a coal-fired power plant, and is a future development trend. At present, a small number of pulse plasma high-voltage power supplies are demonstrated and applied at home and abroad, but the problems of large power consumption, high temperature and poor reliability of a magnetic switch cannot be solved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a pulse corona plasma high-voltage power supply and solves the problems of high power consumption, high temperature and poor reliability of a magnetic switch of the conventional pulse plasma high-voltage power supply.
The high-voltage pulse power supply comprises a high-voltage pulse power supply part and a multi-stage magnetic compression device, wherein the high-voltage pulse power supply part comprises a charger, a high-voltage energy storage capacitor, a series RSD switch, a magnetic saturation switch and a pulse transformer; the high-voltage energy storage capacitor, the series RSD switch, the magnetic saturation switch and the pulse transformer are sequentially connected in series to form a loop, and the charger is connected with the high-voltage energy storage capacitor in parallel and used for charging the high-voltage energy storage capacitor; the multi-stage magnetic compression device is connected with the pulse transformer, and the output end of the multi-stage magnetic compression device is used as the output end of the pulse corona plasma high-voltage power supply.
As the preferable scheme of the invention, the magnetic switch in the multistage magnetic compression device adopts a cascade structure, thereby solving the technical problems of heat dissipation, insulation and the like.
As a preferable scheme of the present invention, a first-stage magnetic switch in the multi-stage magnetic compression device adopts a series structure of 10 single magnetic ring switches, and a heat dissipation oil duct is arranged at a joint of adjacent single magnetic ring switches.
As a preferable scheme of the present invention, the multistage magnetic compression device is a three-stage magnetic compression device.
Compared with the prior art, the invention has the beneficial effects that: the series RSD switch and the magnetic saturation switch are combined to form a working switch of the high-voltage pulse power supply part, and the magnetic saturation switch is switched on only after the series RSD switch is completely switched on, so that dynamic power consumption during switching on of the RSD is eliminated, and the reliability of the series RSD switch can be improved under the working state of high repetition frequency and large current.
Magnetic switches L1, L2 and L3 in the three-stage magnetic compression device adopt a cascade structure, L1 adopts a 10-single-magnetic-ring switch series structure, the withstand voltage of each magnetic ring only needs 10kV, the total withstand voltage of the series connection can reach 100kV, and a heat dissipation oil duct is arranged at the joint of the adjacent single-magnetic-ring switches.
Tests prove that the pulsed corona plasma high-voltage power supply of the invention is low in treatmentConcentration of SO2And NOx, the catalyst still has good removal effect.
Drawings
Fig. 1 is a schematic diagram of a pulsed corona plasma high voltage power supply.
Fig. 2 shows a series configuration of a plurality of single magnetic ring switches according to an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the drawings and examples.
As shown in fig. 1, the multi-stage magnetic compression apparatus in the embodiment is exemplified by a three-stage magnetic compression apparatus, and in fact, other stages of the magnetic compression apparatus may be selected as needed.
As shown in fig. 1, the pulsed corona plasma high-voltage power supply of the present embodiment includes a high-voltage pulse power supply portion and a three-stage magnetic compression device, where the high-voltage pulse power supply portion includes a charger, a high-voltage energy-storage capacitor C0, a serial RSD switch, a magnetic saturation switch L0, and a pulse transformer TP; the high-voltage energy storage capacitor C0, the series RSD switch, the magnetic saturation switch L0 and the pulse transformer TP are sequentially connected in series to form a loop, and the charger is connected with the high-voltage energy storage capacitor C0 in parallel and is used for charging the high-voltage energy storage capacitor C0; the three-stage magnetic compression device is connected with the pulse transformer, and the output end of the three-stage magnetic compression device is used as the output end of the pulse corona plasma high-voltage power supply; magnetic switches L1, L2 and L3 in the three-level magnetic compression device adopt a cascade structure.
As shown in fig. 2, the first-stage magnetic switch L1 in the three-stage magnetic compression device adopts a series structure of 10 single magnetic ring switches, the withstand voltage of each magnetic ring is only 10kV, the total withstand voltage of the series connection can reach 100kV, and a gap is left at the joint of the adjacent single magnetic ring switches to serve as a heat dissipation oil duct.
The three-stage magnetic compression device comprises capacitors C1, C2 and C3 and magnetic switches L1, L2 and L3; two ends of the capacitor C1 are connected with the output end of the pulse transformer TP, and the capacitor C1, the magnetic switch L1 and the capacitor C2 are sequentially connected to form a loop; the capacitor C2, the magnetic switch L2 and the capacitor C3 are sequentially connected to form a loop; one end of the capacitor C3 is connected to one end of the magnetic switch L3, and the other end of the capacitor C3 and the other end of the magnetic switch L3 are connected as output terminals to the external reactor.
In actual work, the pulse transformer TP outputs high-voltage narrow-impulse-resistance with the impulse width of 20nS, the voltage peak value of 110kV and the current peak value of 350A, and after passing through the three-level compression device, the power output impulse indexes are as follows: the pulse width is 500-; as shown in figure 1, the output end of the three-stage magnetic compression device is connected with a reactor, and after testing, a pulse corona plasma high-voltage power supply is used for treating SO2And NOx concentration is less than 500mg/Nm3The flue gas still has good separation effect, and SO in the treated flue gas2The concentration is less than or equal to 50mg/Nm3(ii) a NOx concentration is less than or equal to 100mg/Nm3。
Claims (4)
1. A pulse corona plasma high-voltage power supply comprises a high-voltage pulse power supply part and a multi-stage magnetic compression device, and is characterized in that the high-voltage pulse power supply part comprises a charger, a high-voltage energy storage capacitor, a series RSD switch, a magnetic saturation switch and a pulse transformer; the high-voltage energy storage capacitor, the series RSD switch, the magnetic saturation switch and the pulse transformer are sequentially connected in series to form a loop, and the charger is connected with the high-voltage energy storage capacitor in parallel and used for charging the high-voltage energy storage capacitor; the multi-stage magnetic compression device is connected with the pulse transformer, and the output end of the multi-stage magnetic compression device is used as the output end of the pulse corona plasma high-voltage power supply.
2. The pulsed corona plasma high-voltage power supply according to claim 1, wherein a magnetic switch in the multistage magnetic compression device adopts a cascade structure, thereby solving the technical problems of heat dissipation, insulation and the like.
3. The pulsed corona plasma high-voltage power supply according to claim 1, wherein the first stage magnetic switch in the multi-stage magnetic compression device adopts a series structure of 10 single magnetic ring switches, and a heat dissipation oil duct is arranged at the joint of the adjacent single magnetic ring switches.
4. The pulsed corona plasma high voltage power supply of claim 1, wherein said multi-stage magnetic compression device is a three stage magnetic compression device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910979485.6A CN110662337A (en) | 2019-10-15 | 2019-10-15 | Pulse corona plasma high-voltage power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910979485.6A CN110662337A (en) | 2019-10-15 | 2019-10-15 | Pulse corona plasma high-voltage power supply |
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| Publication Number | Publication Date |
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| CN110662337A true CN110662337A (en) | 2020-01-07 |
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| CN201910979485.6A Pending CN110662337A (en) | 2019-10-15 | 2019-10-15 | Pulse corona plasma high-voltage power supply |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW437266B (en) * | 1997-02-21 | 2001-05-28 | Cymer Inc | Method and apparatus for eliminating reflected energy due to stage mismatch in nonlinear magnetic compression modules |
| FR2908954A1 (en) * | 2006-11-22 | 2008-05-23 | Jean Roger Guichard | Nonthermal plasma generator, e.g. for air or exhaust gas purification, comprises a pulsed corona discharge reactor and a pulse generator with magnetic switching |
| CN101369785A (en) * | 2008-10-07 | 2009-02-18 | 袁晓欧 | Flue gas desulfurization denitriding impulse electric corona plasma direct-current power supply for high power generating plant |
| CN101860255A (en) * | 2010-04-07 | 2010-10-13 | 哈尔滨工业大学 | Main pulse power supply in discharging plasma extreme ultraviolet light source |
| CN103094824A (en) * | 2012-12-27 | 2013-05-08 | 中国科学院安徽光学精密机械研究所 | Laser power supply |
| KR20160082836A (en) * | 2014-12-29 | 2016-07-11 | 주식회사 포스코아이씨티 | System for Compressing High Voltage Pulse and Method for Controlling The Same |
| WO2016151609A1 (en) * | 2015-03-24 | 2016-09-29 | Di Canto Gennaro | Plasma propulsion system and method |
| CN107081046A (en) * | 2017-06-23 | 2017-08-22 | 杭州天明环保工程有限公司 | A kind of pulse generating unit for gas cleaning |
| CN210725454U (en) * | 2019-10-15 | 2020-06-09 | 浙江佳环电子有限公司 | Pulse corona plasma high-voltage power supply |
-
2019
- 2019-10-15 CN CN201910979485.6A patent/CN110662337A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW437266B (en) * | 1997-02-21 | 2001-05-28 | Cymer Inc | Method and apparatus for eliminating reflected energy due to stage mismatch in nonlinear magnetic compression modules |
| FR2908954A1 (en) * | 2006-11-22 | 2008-05-23 | Jean Roger Guichard | Nonthermal plasma generator, e.g. for air or exhaust gas purification, comprises a pulsed corona discharge reactor and a pulse generator with magnetic switching |
| CN101369785A (en) * | 2008-10-07 | 2009-02-18 | 袁晓欧 | Flue gas desulfurization denitriding impulse electric corona plasma direct-current power supply for high power generating plant |
| CN101860255A (en) * | 2010-04-07 | 2010-10-13 | 哈尔滨工业大学 | Main pulse power supply in discharging plasma extreme ultraviolet light source |
| CN103094824A (en) * | 2012-12-27 | 2013-05-08 | 中国科学院安徽光学精密机械研究所 | Laser power supply |
| KR20160082836A (en) * | 2014-12-29 | 2016-07-11 | 주식회사 포스코아이씨티 | System for Compressing High Voltage Pulse and Method for Controlling The Same |
| WO2016151609A1 (en) * | 2015-03-24 | 2016-09-29 | Di Canto Gennaro | Plasma propulsion system and method |
| CN107081046A (en) * | 2017-06-23 | 2017-08-22 | 杭州天明环保工程有限公司 | A kind of pulse generating unit for gas cleaning |
| CN210725454U (en) * | 2019-10-15 | 2020-06-09 | 浙江佳环电子有限公司 | Pulse corona plasma high-voltage power supply |
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