CN102284365B - A kind of pulse power source device for electro-precipitator - Google Patents
A kind of pulse power source device for electro-precipitator Download PDFInfo
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- CN102284365B CN102284365B CN201110163018.XA CN201110163018A CN102284365B CN 102284365 B CN102284365 B CN 102284365B CN 201110163018 A CN201110163018 A CN 201110163018A CN 102284365 B CN102284365 B CN 102284365B
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Abstract
A kind of pulse power source device for electro-precipitator by pulses generation major loop, reactor and vertoro, intelligent controller, secondary singal treatment circuit, trigger isolator, complementary energy reuse device and electric energy coupling isolator and formed.It produces pulse at the low-pressure end of the vertoro of electric cleaner electric power system, then by forming existing basic DC voltage after the boosting rectification of vertoro, having again the high-voltage pulse of pulse, being supplied to electric cleaner load; The electric field remainder electric energy of electric cleaner is recycled by complementary energy reuse device and electric energy coupling isolator by it, saves electric energy.It can solve in electric cleaner customary DC powered operation effectively to the inverse corona problem that high resistivity dust exists; improve the efficiency of dust collection of electric cleaner significantly, save electric energy, supply unit equipment is simple; low cost of manufacture; easy and simple to handle, applying flexible, is applicable to transformation or the renewal of the original DC power-supply system of electric cleaner; the smoke and dust treatment of the industries such as metallurgy, electric power, building materials, chemical industry and environmental protection can be widely used in; energy-saving and emission-reduction, protection of the environment, benefits the society.
Description
Technical field
The present invention relates to a kind of pulse power source device for electro-precipitator.
Background technology
Electric cleaner is widely used cleaner, is mainly used in the purified treatment of flue dust.The power supply of electric cleaner is one of key factor of its clean-up effect of shadow.Electric cleaner adopts synchronization mechanism commutation supply voltage the earliest, and power supply level is lower.Along with the fast development of electronic technology, the power supply level of electric cleaner also improves gradually, and its automatic intelligent controls extensive use.At present, domestic and international electric cleaner mainly adopts customary DC Power supply, its major defect is to high resistivity dusts such as high-temperature fines, easy generation inverse corona, cause electric cleaner to run electric field electric discharge frequent, secondary voltage declines significantly, has a strong impact on the normal operation of electric cleaner, cause efficiency of dust collection low, waste electric energy.Electric cleaner pulse power supply can effectively overcome high resistivity dust and easily produce back corona phenomenon, improves efficiency of dust collection, and saving electric energy, is the important development direction that electric cleaner is powered.
The pulse power supply of electric cleaner starts from nineteen fifties, and American scholar utilizes radar system to produce Millisecond pulse power supply the earliest, shows pulse power supply advantage.Hereafter, the pulse power supply of electric cleaner is fast-developing, existing multiple pulse power practical application.Usually, electric precipitation pulse power supply refers to and superpose high-voltage pulse on direct current basic voltage, and pulse width general <1 ~ 300 μ S, typical pulse repetition rate is 30 ~ 300 PPS.It is form pulse power supply after the high-pressure side superposition of vertoro substantially that the current pulse power realizing electric cleaner is both at home and abroad powered.The typical version of this kind of pulse power has three kinds.First customary DC voltage and pulse voltage are produced by two cover high-tension apparatuses respectively, by high-voltage pulse generator, HVDC is become pulse to export, pulse switch adopts external series gap usually, can be made into detachable drum type brake, adjustable clearances etc., by regulating clearance control peak value of pulse, regulating charge power supply voltage, controlling repetition rate etc.Main feature high direct voltage is cut into pulse by mechanical switch such as gaps export, and can obtain narrower pulse square wave, but adopt gap discharge, affect utilization rate of electrical.The pulse power supply technology of the development such as high pressure engineering company of the U.S., Fei Da company of Sweden belongs to this class.It two is utilize motor driving isolating switch to rotate, and produces spark discharge and form pulse power supply at high direct voltage end.Main feature utilizes revolution isolating switch, and can obtain nanosecond pulse, but mechanical rotating isolating switch easily produces spark galvano-cautery, impact is turned round the isolating switch life-span and affects practical application.The pulse power produced as Masuda company of the U.S. etc. belongs to this kind of.It three is on high direct voltage basic voltage, produces pulse by pulse forming switch, and then by high voltage pulse transformer, forms pulse power supply.The feature of this pulse power supply adopts electronic switch as pulse switch, electric cleaner load is utilized to form a series LC oscillating circuit as a capacitor and pulse transformer, pulse is produced at high-pressure side, waveform is sinusoidal wave, pulse width is wider, adopt electronic impulse switch safety good, but there is electric dust removal system impedance loop matching problem, the pulse power supply technology as Smidth company of Denmark just belongs to this.Because this kind of technology all needs two cover high-tension apparatuses to realize pulse power supply, apparatus expensive (being 5-8 times of customary DC power supply), there is no the electric field dump energy recovery system of special electric cleaner, and it is high to produce impulse element quality requirement at high-pressure side, security requirement is high, manufacturing process is complicated, applies more difficult.Therefore, development economy, safety and the efficient electric cleaner pulse power are important topics of Electrical Dust Precipitation Industry, are very necessary.
Summary of the invention
The object of this invention is to provide a kind of pulse power source device for electro-precipitator.It produces pulse by the low-pressure end at the vertoro of electric cleaner electric power system, then by forming existing basic DC voltage after the boosting rectification of vertoro, having again the high-voltage pulse of pulse, being supplied to electric cleaner load; The electric field remainder electric energy of electric cleaner is recycled by complementary energy reuse device and electric energy coupling isolator by it, saves electric energy.It can solve in electric cleaner customary DC powered operation effectively to the inverse corona problem that high resistivity dust exists; improve the efficiency of dust collection of electric cleaner significantly, save electric energy, supply unit equipment is simple; low cost of manufacture; easy and simple to handle, applying flexible, is applicable to transformation or the renewal of the original DC power-supply system of electric cleaner; the smoke and dust treatment of the industries such as metallurgy, electric power, building materials, chemical industry and environmental protection can be widely used in; energy-saving and emission-reduction, protection of the environment, benefits the society.
To achieve these goals, the present invention adopts following technical scheme:
Pulse power source device for electro-precipitator is made up of pulses generation major loop, reactor, vertoro, intelligent controller, secondary singal treatment circuit, triggering isolator, complementary energy reuse device and electric energy coupling isolator.Secondary singal treatment circuit is connected with pulses generation major loop by intelligent controller, complementary energy reuse device is connected with pulses generation major loop by electric energy coupling isolator, one output of vertoro is connected with pulses generation major loop by reactor, and another output is directly connected with pulses generation major loop.Its low-pressure end at the vertoro of electric cleaner powersupply system produces pulse, then by forming existing basic DC voltage after the boosting of vertoro and rectification, having again the high-voltage pulse of pulse, being supplied to electric cleaner load; The electric field redundance electric energy of electric cleaner is recycled by complementary energy reuse device and electric energy coupling isolator by it, saves electric energy.Pulses generation major loop is primarily of compositions such as commutation diode ZP1 and ZP2, thyristor SCR1 and SCR2, rc protection circuit C1 and R1 and piezo-resistance protection RV1 and RV2.Pulse power supply adopts LRC resonance method, not only there is the charging interval short, the features such as pulse power supply Parameter adjustable, and reclaim by oscillation circuit electric discharge due to the unnecessary electric charge of Electric Field in ESP and dust layer, thus the supplied character of high resistivity dust can be adapted to, effectively overcome high specific resistance and easily produce back corona phenomenon, save electric energy.
Device of the present invention reclaims the electric energy of Electric Field in ESP remainder by complementary energy recover, pulse is produced at the low-pressure end of the vertoro of electric cleaner electric power system, then after the boosting rectification of vertoro, existing basic DC voltage is formed, there is again the high-voltage pulse of pulse voltage to power, have the following advantages:
(1) produce pulse at vertoro low-pressure end, only need a set of equipment to realize pulse power supply, device security is reliable, and cost is low, and controllable silicon major loop can be powered continuously.
(2) effectively can overcome the inverse corona bad phenomenon of electric cleaner emerged in operation, improve dust-collecting efficiency significantly, reduce the exiting flue gas dust content of electric cleaner, reclaim the dump energy of Electric Field in ESP significantly, economize on electricity reaches 30%--85%.
(3) supply unit equipment is simple, operates simple and easy, applying flexible, installs quick and convenient.
Accompanying drawing explanation
Fig. 1 is functional-block diagram of the present invention.
Fig. 2 is the schematic diagram of pulses generation major loop.
Fig. 3 is the functional-block diagram of intelligent controller.
Fig. 4 is the schematic diagram triggering isolator.
Detailed description of the invention
Further illustrate the present invention below by example, but invention is not limited thereto.
A kind of pulse power source device for electro-precipitator is according to actual conditions, depending on structural parameters and the operating condition of electric cleaner, choose different design parameters, design and produce pulses generation major loop, reactor, vertoro, intelligent controller, secondary singal treatment circuit, trigger isolator, complementary energy reuse device and electric energy coupling isolator.Secondary singal treatment circuit is connected with pulses generation major loop by intelligent controller, complementary energy reuse device is connected with pulses generation major loop by electric energy coupling isolator, one output of vertoro is connected with pulses generation major loop by reactor, and another output is directly connected with pulses generation major loop.Consider different electric cleaner power supply system of DC source, choose the parameter of commutation diode ZP1 and ZP2, thyristor SCR1 and SCR2 and the protection circuit mated with former straight-flow system, be retrofitted on former DC power-supply system according to principle shown in Fig. 1 and Fig. 2.
Embodiment 1
2008, certain power plant used HG-1172/17.2-PM2 boiler (in June, 2006 puts into operation), 1# unit capacity 350MW, and the electric cleaner circulation basal area of outfit is 290m
2, four electric fields (16 subregion electric fields), the altogether DC power supply of supporting 16 GGAj02H-1.2A/72KV.Under normal production conditions, flue gas main character is as follows: exhaust gas volumn 104.03 × 10
4m
3/ h; Import dust contained flue gas concentration 25g/Nm
3(maximum); Flue-gas temperature about 130 DEG C; Dust specific resistance >10
11Ω Cm.
According to above situation, we select silicon cell specification to be the electric cleaner high voltage narrow pulse electric supply installation of 800A, and output voltage 72KV exports secondary current 1200mA.Shown in Fig. 2, be installed in former straight-flow system.Electric power system after repacking is stable, tests through local environmental administration, and substantially keeping with under the condition of operating mode, house outlet concentration on average reduces by 56.8%, and power savings reaches 45% compared with former straight-flow system.
Embodiment 2
2009, the gas cleaning process of the 70T/d coal-burning boiler of certain steam power plant of petro-chemical corporation.The electric cleaner that this cleaning system is equipped with is horizontal three electric fields, and net sectional area is 70m
2.Former use dc source is GGAJ02, capacity 0.8mA/72kV.Under normal production conditions, deduster import dust contained flue gas concentration 12g/Nm
3(maximum); Flue-gas temperature > 150 DEG C; Dust specific resistance >10
10Ω Cm.
According to above situation, we select silicon cell specification to be the electric cleaner high voltage narrow pulse electric supply installation of 500A, and output voltage 72KV exports secondary current 800mA.Shown in Fig. 2, be installed in former straight-flow system.Electric power system after repacking is stable, tests through local environmental administration, and substantially keeping with under the condition of operating mode, house outlet concentration on average reduces by 42.8%, and power savings reaches 50% compared with former straight-flow system.
Embodiment 3
2010, certain steel enterprise iron-smelter.This factory's pelletizing workshop electric cleaner is used for processing palletizing shaft furnace tail gas, and its net sectional area is 120m
2four electric field series connection, former use dc source model is DJ-96 type, capacity 800mA/72kV.Under normal production conditions, flue gas main character is as follows: exhaust gas volumn 680000m
3/ h ~ 760000 m
3/ h, import dust contained flue gas concentration 23g/Nm
3(maximum), flue-gas temperature 110 DEG C ~ 150 DEG C, water content about 3.6%, dust specific resistance: >10
12Ω Cm.
According to above situation, we select silicon cell specification to be the electric cleaner high voltage narrow pulse electric supply installation of 800A, and output voltage 72KV exports secondary current 800mA.Shown in Fig. 2, be installed in former straight-flow system.Electric power system after repacking is stable, tests through local environmental administration, and substantially keeping with under the condition of operating mode, house outlet concentration on average reduces by 25.8%, and power savings reaches 73.60% compared with former straight-flow system.
Claims (5)
1. a pulse power source device for electro-precipitator, is characterized in that: it is made up of pulses generation major loop, reactor, vertoro, intelligent controller, secondary singal treatment circuit, triggering isolator, complementary energy reuse device and couple electrical energy isolator, secondary singal treatment circuit is connected with pulses generation major loop by intelligent controller, complementary energy reuse device is connected with pulses generation major loop by couple electrical energy isolator, one output of vertoro is connected with pulses generation major loop by reactor, another output is directly connected with pulses generation major loop, said pulses generation major loop is by the first commutation diode (ZP1) and the second commutation diode (ZP2), first thyristor (SCR1) and the second thyristor (SCR2), rc protection circuit electric capacity (C1) and resistance (R1) and the first piezo-resistance protect (RV1) and the second piezo-resistance to protect (RV2) to form, the negative pole of described first commutation diode (ZP1) and the second commutation diode (ZP2) to being connected in series, the positive pole of the first thyristor (SCR1) and the second thyristor (SCR2) is to being connected in series, connect after its parallel connection by PSP circuit again, pulse recurrence frequency is 100-500PPS, pulse width 30-150 μ S, pulse width is adjustable, and peak value of pulse is 1.2-2.5 times of basic DC voltage, said secondary singal treatment circuit is made up of secondary voltage sample resistance, secondary current sample resistance, A/D converter, photoisolator, as intelligent controller control inputs signal, said triggering isolator is by the first isolating transformer (TT1) and the second isolating transformer (TT2), first diode (D3), the second diode (D4), the 3rd diode (D5) and the 4th diode (D6), first electric capacity (C7) and the second electric capacity (C8), the 3rd piezo-resistance (RV3) formed.
2. according to a kind of pulse power source device for electro-precipitator described in claim 1, it is characterized in that: said reactor and vertoro, reactor is the inductance coil with the matches impedances of electric precipitation current supply circuit, and vertoro is that high impedance or Low ESR transformer and bridge type silicon rectification circuit form.
3. according to a kind of pulse power source device for electro-precipitator described in claim 1, it is characterized in that: said intelligent controller, be made up of sampled signal processor, microprocessor, D/A converter, input through keyboard circuit, LCD drive circuit, power circuit.
4. according to a kind of pulse power source device for electro-precipitator described in claim 1, it is characterized in that: said complementary energy reuse device is made up of adjustable potentiometer (Rp), impedor (L), storage capacitor (C), rectifying tube (ZP) and energy storage switch.
5. according to a kind of pulse power source device for electro-precipitator described in claim 2, it is characterized in that: the current capacity scope 300A-800A of described first commutation diode (ZP1) and the second commutation diode (ZP2), the first thyristor (SCR1) and the second thyristor (SCR2), withstand voltage scope is greater than 1200V.
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| CN201110163018.XA CN102284365B (en) | 2011-06-17 | 2011-06-17 | A kind of pulse power source device for electro-precipitator |
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| CN201110163018.XA CN102284365B (en) | 2011-06-17 | 2011-06-17 | A kind of pulse power source device for electro-precipitator |
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| CN102847610B (en) * | 2012-08-23 | 2013-05-01 | 襄阳九鼎昊天环保设备有限公司 | DC composite pulse high voltage power supply for electrostatic precipitator |
| CN105097189B (en) * | 2014-05-21 | 2017-08-29 | 杭州天明电子有限公司 | A kind of pulse transformer and the electrostatic precipitator including the pulse transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4326860A (en) * | 1980-11-28 | 1982-04-27 | Nwl Transformers | Ripple insensitive electric precipitator |
| US5311420A (en) * | 1992-07-17 | 1994-05-10 | Environmental Elements Corp. | Automatic back corona detection and protection system |
| CN201023068Y (en) * | 2007-03-12 | 2008-02-20 | 杭州群策科技有限公司 | High pressure narrow pulse power-supplying device for electric dust remover |
| CN202479047U (en) * | 2011-06-17 | 2012-10-10 | 浙江工商大学 | Pulse power supply unit for electric dust remover |
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2011
- 2011-06-17 CN CN201110163018.XA patent/CN102284365B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4326860A (en) * | 1980-11-28 | 1982-04-27 | Nwl Transformers | Ripple insensitive electric precipitator |
| US5311420A (en) * | 1992-07-17 | 1994-05-10 | Environmental Elements Corp. | Automatic back corona detection and protection system |
| CN201023068Y (en) * | 2007-03-12 | 2008-02-20 | 杭州群策科技有限公司 | High pressure narrow pulse power-supplying device for electric dust remover |
| CN202479047U (en) * | 2011-06-17 | 2012-10-10 | 浙江工商大学 | Pulse power supply unit for electric dust remover |
Non-Patent Citations (1)
| Title |
|---|
| 收尘区脉冲供电对电除尘器收集性能的影响;李济吾等;《环境工程学报》;20110228;第5卷(第2期);399-403 * |
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