CN106179756A - Method for realizing electric precipitation of high-frequency high-voltage SIR power supply - Google Patents
Method for realizing electric precipitation of high-frequency high-voltage SIR power supply Download PDFInfo
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- CN106179756A CN106179756A CN201510210866.XA CN201510210866A CN106179756A CN 106179756 A CN106179756 A CN 106179756A CN 201510210866 A CN201510210866 A CN 201510210866A CN 106179756 A CN106179756 A CN 106179756A
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Abstract
The invention relates to a method for realizing electric dust removal of a high-frequency high-voltage SIR power supply, which comprises the steps of inputting a three-phase 380V 50-60 HZ alternating current power supply, forming 520V direct current voltage through three-phase controllable rectification and filtering, then inputting the voltage to a high-frequency rectifier transformer through high-frequency inversion of an IGBT module, forming 70kv through high-frequency transformation and rectification, and supplying the voltage to a polar plate of an electric dust remover through a current-limiting resistor R0. And the output current, the output voltage and the output pulse are fed back to the DSP controller to change the pulse working frequency or the pulse width and are sent to the IGBT full-bridge high-frequency inverter through the isolation driver so as to adjust the output current and the output voltage. The output open circuit protection, the short circuit protection, the overheat protection of the transformer oil and the IGBT, the output flashover control and processing and the like are all realized by the DSP controller.
Description
Technical field
The present invention relates to the electrostatic precipitation technology of a kind of novel power supply, be specifically related to the implementation method of a kind of high-frequency and high-voltage power supply being applicable to electric precipitation field.Belong to field of environment protection.
Background technology
While modern industry high speed development, inevitably bring problem of environmental pollution.Can discharge substantial amounts of dust in the production process of industrial products, dust spreads with the wind can severe contamination air, harm health of human body.Therefore before industrial smoke is discharged in air, it must be carried out dust disposal.Traditional dust collection method mainly has two kinds, and one is filtering technique, dust and air is separated;Another kind is by centrifugal action, makes gas come with dust separation;Both approaches industrially has an application, but all has that efficiency is low, process the shortcomings such as exhaust gas volumn is the tallest and the biggest, energy consumption is high.In recent years, along with the progress of Power Electronic Technique, electrostatic precipitator technology is developed rapidly, and owing to its efficiency of dust collection is high, energy consumption is little, process dust granules wide ranges and operating cost is low, has obtained increasing attention and application.
Its operation principle of electrostatic precipitator is: when in flue gas, dust grit is by high-voltage electrostatic field; collide and charged (or charged in ion diffusion motion) with interelectrode negative ions and electronics; the grit of electronics and ion anisotropy electrode movement long-pending be attached on opposite electrode under the effect of electric field force on band; the dust on electrode is made to fall in collection ash bucket by modes such as rappings; the flue gas by electric cleaner is made to be purified; reach to protect air, the purpose of protection environment.
Electrostatic precipitation has become as requisite dedusting means in China's basic industries such as Coal dressing, mining site, power plant, metallurgy, oil, chemical industry at present.
From the eighties in last century to now, the high-voltage suppling power that field of Environment Protection electric cleaner is used is essentially all and uses input for biphase controlled silicon industrial frequency phase-controlled power, this has also been done many improvement by people therebetween, such as have developed the controlled silicon industrial frequency phase-controlled power that input is changed into three-phase, amplitude modulation LC constant-current source etc., have also been made much work in terms of system control, such as feedback control amount is made into electric current by voltage, power supply regulation have employed single-chip microcomputer etc..Make a general survey of on it, be all do not catch up with environmental protection standard improve constantly and save energy and reduce the cost, the objective requirement of sustainable development, its key problem be the operating frequency of power supply be power frequency 50HZ, the power transformer and the filter inductor capacitor that cause power supply are bulky, energy-consuming consumptive material, expend space, and affect the raising of efficiency of dust collection.
Being summed up, this traditional low frequency rectifier power source T/R of electric cleaner mainly has five big shortcomings: one is that operating frequency is low, conversion efficiency as little as less than 75%, expends electric energy;Two is that operating frequency is low, and transformator and wave filter volume are big, and Heavy Weight expends substantial amounts of copper and ferrum, do not meets sustainable development, and price is the highest simultaneously, and cost performance is low;Three be power supply input for biphase 380v AC power frequency supply, be again operating frequency phase regulation, cause input power factor as little as less than 0.7, electrical network is caused the biggest electromagnetic interference, Electro Magnetic Compatibility is poor, does not meets natural harmony and develops;Four is that the Industrial Frequency Transformer of bulky power supply control and regulation cabinet and isolation boosting lives in two separate places, and expends space, increases capital cost;Five is that output ripple is big, cause corona voltage low, waveform is again single power frequency ripple, make to adapt to the operating mode of high specific resistance, do not reach the new demand (China's firepower electrical plant dust emission standard was reduced to 50 milligrams/cubic metre by 200 milligrams/cubic metre of the original nineties in 2004) of field of Environment Protection dust emission standard.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of can be under the precondition that its body of dedusting is not transformed, substitute existing industrial frequency rectifying power supply completely, simultaneously while improving efficiency of dust collection, drastically increase power factor, reduce energy resource consumption, and do not increase other device any.
The object of the present invention is achieved like this: the implementation method of a kind of high-frequency and high-voltage SIR power supply electric precipitation, said method comprising the steps of:
Step one, input three-phase 380V/50 ~ 60HZ alternating current power supply, be filtered into about 520V DC voltage through three phase rectifier;
Step 2, DC voltage through IGBT inverter bridge, resonant capacitance Cs, resonant inductance Ls and high frequency transformer composition high-frequency resonant formula inverter circuit, high-frequency inversion, frequency 15 ~ 50kHZ, input to high frequency transformer again;
Step 3, inversion waveform boost through high frequency transformer, about 70kv, then after high-frequency rectification bridge rectification, obtain voltage waveform on ESP, supply cathode of electric dust collector plate.
Step 4, output electric current, voltage, feed back to dsp controller and change pulsed operation frequency or pulse width and give IGBT full-bridge high-frequency inverter so that output current output voltage to be adjusted through driver for isolating.
The protection of step 5, output open circuit, short-circuit protection, transformer oil and the overtemperature protection of IGBT, output flashover control and process etc. are realized in the lump by digital signal processor DSP controller.
Compared with prior art, the invention has the beneficial effects as follows:
The high-frequency high-voltage switch power source SIR that the present invention uses is operated in more than 20kHZ, and compared with conventional T/R, high-frequency high-voltage switch power source SIR provides the output of the most pulsation-free direct current, and this electrostatic precipitator enable is run with spark generation point voltage.High-frequency high-voltage switch power source SIR improves supply voltage and the electric current of electrostatic precipitator, and for the thin and dust of low resistivity, electric cleaner dust emission concentration significantly reduces.If calculated by 25%, then under above-mentioned identical operating mode, high frequency switch power SIR output to exceed 56% than controlled silicon industrial frequency phase control rectifier power supply T/R, thus decreases dust emission concentration, improves efficiency of dust collection.
Accompanying drawing explanation
Fig. 1 be high-frequency and high-voltage SIR power supply electric precipitation of the present invention realize theory diagram.
Fig. 2 is medium-high frequency Switching Power Supply of the present invention and the output DC voltage waveform of controllable silicon phase control rectifier power supply T/R.
Fig. 3 is the LCC loop topology figure of high-frequency and high-voltage SIR power supply electric precipitation of the present invention.
Detailed description of the invention
As can be seen from Figure 1: the output valley point voltage that conventional electric dust collector controllable silicon power frequency phase control rectifier power supply T/R produces, lower by 25% than the output DC voltage that high-frequency high-voltage switch power source SIR produces.Valley point voltage is pilot spark in electrostatic dust remover electric field.Electric spark can suppress ionization, significantly limits the average voltage being added on electrode, has a strong impact on the efficiency of dust collection of electric cleaner.
See Fig. 2, the present invention relates to the implementation method of a kind of high-frequency and high-voltage SIR power supply electric precipitation, said method comprising the steps of:
Step one, input three-phase 380V/50 ~ 60HZ alternating current power supply, be filtered into about 520V DC voltage through three phase rectifier;
Step 2, DC voltage through IGBT inverter bridge, resonant capacitance Cs, resonant inductance Ls and high frequency transformer composition high-frequency resonant formula inverter circuit, high-frequency inversion (frequency 15 ~ 50kHZ), input to high frequency transformer, as shown in Figure 3 again;
Step 3, inversion waveform boost (about 70kv) through high frequency transformer, then after high-frequency rectification bridge rectification, obtain voltage waveform on ESP, supply cathode of electric dust collector plate.
Step 4, output electric current, voltage, feed back to dsp controller and change pulsed operation frequency or pulse width and give IGBT full-bridge high-frequency inverter so that output current output voltage to be adjusted through driver for isolating.
The protection of step 5, output open circuit, short-circuit protection, transformer oil and the overtemperature protection of IGBT, output flashover control and process etc. are realized in the lump by digital signal processor DSP controller.
Embodiment 1:
Certain steel mill 360m2Sintering device handpiece electric precipitation high frequency electric source is transformed, and 16 high frequency electric sources, for all electric fields of cleaner unit, substituted for original power frequency supply.Original power frequency supply, secondary voltage about 40kV, monthly average electricity consumption 890,000 kW, the moon electricity charge about 54.7 ten thousand yuan.After applying this high frequency electric source, secondary voltage increases to more than 60kV, substantially without flashover.Monthly average power consumption 510,000 kW, the moon electricity charge about 31.3 ten thousand yuan, power cost saving 23.4 ten thousand yuan.Electric energy about 42.6%.Concentration of emission is by the 48.5mg/Nm before transforming simultaneously3It is reduced to discharge improved 31.5mg/Nm3 。
Embodiment 2:
Yunnan power plant for self-supply of company 3# electric cleaner renovation and improving, 8 high frequency electric sources, with substituted for original power frequency supply.Power consumption after power consumption: 310kW/h transformation before transformation: 143kW/h electric energy: 54%.Concentration of emission is by the 200mg/Nm before transforming simultaneously3It is reduced to discharge improved 45mg/Nm3 。
Claims (1)
1. the implementation method of a high-frequency and high-voltage SIR power supply electric precipitation, it is characterised in that said method comprising the steps of:
Step one, input three-phase 380V/50 ~ 60HZ alternating current power supply, be filtered into about 520V DC voltage through three phase rectifier;
Step 2, DC voltage warp again
IGBT inverter bridge, resonant capacitance Cs, resonant inductance Ls and high frequency transformer composition high-frequency resonant formula inverter circuit, high-frequency inversion, frequency 15 ~ 50kHZ, input to high frequency transformer;
Step 3, inversion waveform boost through high frequency transformer, about 70kv, then after high-frequency rectification bridge rectification,
Obtain voltage waveform on ESP, supply cathode of electric dust collector plate;
Step 4, output electric current, voltage, feed back to dsp controller and change pulsed operation frequency or pulse width and give IGBT full-bridge high-frequency inverter so that output current output voltage to be adjusted through driver for isolating;
The protection of step 5, output open circuit, short-circuit protection, transformer oil and the overtemperature protection of IGBT, output flashover control and process etc. are realized in the lump by digital signal processor DSP controller.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108187914A (en) * | 2018-01-17 | 2018-06-22 | 厦门龙净环保节能科技有限公司 | A kind of dedusting power control method, device and power-supply device |
CN109604061A (en) * | 2018-10-26 | 2019-04-12 | 福建省青山纸业股份有限公司 | A kind of dust removal method of pulsed high frequency electric source |
CN109962633A (en) * | 2017-12-25 | 2019-07-02 | 湖北新空电气有限公司 | A kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection |
CN113399118A (en) * | 2021-05-13 | 2021-09-17 | 浙江天洁环境工程有限公司 | High-frequency power supply control system and electric dust removal device thereof |
CN113996444A (en) * | 2021-10-29 | 2022-02-01 | 咸宁南玻玻璃有限公司 | Closed-loop control system for high-voltage electrostatic dust removal |
-
2015
- 2015-04-29 CN CN201510210866.XA patent/CN106179756A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109962633A (en) * | 2017-12-25 | 2019-07-02 | 湖北新空电气有限公司 | A kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection |
CN108187914A (en) * | 2018-01-17 | 2018-06-22 | 厦门龙净环保节能科技有限公司 | A kind of dedusting power control method, device and power-supply device |
CN109604061A (en) * | 2018-10-26 | 2019-04-12 | 福建省青山纸业股份有限公司 | A kind of dust removal method of pulsed high frequency electric source |
CN113399118A (en) * | 2021-05-13 | 2021-09-17 | 浙江天洁环境工程有限公司 | High-frequency power supply control system and electric dust removal device thereof |
CN113996444A (en) * | 2021-10-29 | 2022-02-01 | 咸宁南玻玻璃有限公司 | Closed-loop control system for high-voltage electrostatic dust removal |
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