CN105080722A - Anti-interference direct-current pulse power source for electrostatic dust collection - Google Patents
Anti-interference direct-current pulse power source for electrostatic dust collection Download PDFInfo
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Abstract
The invention discloses an anti-interference direct-current pulse power source for electrostatic dust collection. The anti-interference direct-current pulse power source comprises a three-phase alternating-current power source and a main circuit switch connected with the three-phase alternating-current power source. The anti-interference direct-current pulse power source is characterized in that after three-phase alternating current passes through the main circuit switch, one path of alternating current is boosted and rectified through a direct-current generation unit to obtain direct-current high voltage with the voltage value smaller than or equal to 60 kV, and the other path of alternating current is processed through a pulse generation unit to output a high voltage pulse with the pulse width smaller than 100 microseconds at the output efficiency ranging from 100 Hz to 500 Hz at the amplitude smaller than or equal to 60 kV under the control of a signal control unit; and the high-voltage pulse and the direct-current high voltage output by the direct-current generation unit are applied on a pole plate of an electrostatic dust collection device after being jointly subjected to synthesis in the same direct current and pulse superposition unit.
Description
Technical field
The present invention relates to environmental protection equipment power supply, particularly a kind of electrostatic precipitation direct current pulse power source.
Background technology
Electrostatic precipitation is a kind of dedusting method conventional in modern industry system, is also a kind of important means of control atmosphere pollution.Electrostatic precipitator body is normally made up of two opposite polarity electrodes, and the lineation electrode that its mean curvature is larger is corona discharge electrode or claims discharge electrode, and the plate electrode that curvature is less is called dust collecting electrode.Electrostatic precipitator is by setting up a high voltage electric field between discharge electrode and dust collecting electrode, the gas flowing through electric field is ionized, and then make charged by the dust granules of electric field after under the effect of electric field force, shift to dust collecting electrode and dust collecting electrode pile up, dust collects by the mode finally by vibration dust-cleaning.
At present, the electrostatic precipitator that most enterprises adopts adopts HVDC as power supply.Under this power supply mode, because dust layer equivalent capacity effect can cause back corona phenomenon, cause efficiency of dust collection to decline, and be less than the dust granules of 0.1 μm for particle diameter, efficiency of dust collection is very low.Along with improving constantly of national requirements for environmental protection, also improve the exhaust emission requirements of enterprise, traditional electrostatic precipitator cannot meet the demands gradually thereupon, is badly in need of changing or transformation.Compared to direct current supply, when adopting pulse power supply mode, the equivalent capacity of precipitator dust layer can only fill little electric charge with during pulse applies, during pulse disappears lotus of charging substantially discharge, so dust layer will make dust cause inverse corona because stored charge forms high pressure; In addition, pulsed high voltage generator is that pulse is charged to the charged of dust, thus has good energy-saving effect; High voltage pulse is adopted to power the arresting efficiency that also can improve superfine particulate matter.Therefore, compared with the deduster of the DC power supply of routine, the deduster dust removing effects that DC pulse superposition is powered is better.
For above-mentioned situation, many enterprises, as Xiangyang nine Ding Haotian environmental protection equipment Co., Ltd, Zhejiang Liancheng Environment Science and Technology Co., Ltd. and Jiahuan Electronic Co., Ltd., Zhejiang Prov. etc., propose the design of powering for electrostatic precipitator in the mode of HVDC superimposed pulse in succession.Thus dust arrester is had can accomplish to overcome back corona phenomenon, without serious flashover, the advantage such as collection efficiency improving fine solid particle, but also there are some shortcomings: 1, design does not take into full account that HVDC or high-voltage pulse may produce whole system in start-up course and impact simultaneously, also the direct current component before not formed high-voltage pulse carries out closed-loop control, and operation stability and the antijamming capability of system are low.2, in the generation of high-voltage pulse, mostly be by first for three phase mains rectification another mistake is changed to high frequency and boosts, under high pressure rectification again, then produce pulse by the action of switching device and be applied to pulse transformer and finally produce high-voltage pulse, such multiple conversions complex structure, not only can increase the loss of electric energy, condition of high voltage is very high to the requirement of switching device simultaneously, and corresponding design and maintenance cost can be very high.3, control too much, to increase the complexity of control system, add the difficulty to existing precipitator energisation Power supply alteration simultaneously to the generating portion of HVDC first-harmonic.Above-mentioned reason limits further genralrlization and the application of existing mentality of designing.
Summary of the invention
The object of this invention is to provide a kind of operation stability and antijamming capability is good, structure is simple, design and maintenance cost is low, the complexity of control system is little, be conducive to existing precipitator energisation Power supply alteration a kind of electrostatic precipitation direct current pulse power source.
For reaching above object, the present invention takes following technical scheme to be achieved:
One can jamproof electrostatic precipitation direct current pulse power source, comprise the main circuit switch of a connection three-phase alternating-current supply, it is characterized in that, three-phase alternating current is after main circuit switch, and a road obtains the high direct voltage that magnitude of voltage is not more than 60kV after a direct current generation unit boosting and rectification; Under the control of another Lu Yi signaling control unit, through the high-voltage pulse that an impulse generating unit output frequency is 100 ~ 500Hz, pulsewidth is not more than 100 μ s, amplitude is no more than 60kV, the high direct voltage that this high-voltage pulse and direct current generation unit export is applied on electrostatic precipitator pole plate after jointly synthesizing in a direct current and superimposed pulses unit.
In such scheme, described impulse generating unit is successively by three-phase bridge fully controlled rectifier module, DC-DC booster circuit, pulse boosting module composition, wherein, under the control of signaling control unit, input voltage is risen to 200 ~ 600V by 0V and is stabilized in this value by three-phase bridge fully controlled rectifier module gradually, again through DC-DC booster circuit, output voltage rises to 500 ~ 1500V gradually and is stabilized in this value, finally in pulse boosting module, producing frequency is 100 ~ 500Hz, pulsewidth is not more than 100 μ s, amplitude is no more than the high-voltage pulse of 60kV, export direct current and superimposed pulses unit to.
Described signaling control unit comprises signal and controls and processing module, the control system power supply module providing electric energy for this module, described signal controls to export point three tunnels with the control of processing module, respectively: connect three-phase bridge fully controlled rectifier module by phase shift trigger; DC-DC booster circuit is connected by IGBT1 trigger board; Connect pulse boosting module by IGBT2 trigger board, signal controls to gather by the first voltage sensor the voltage signal that three-phase bridge fully controlled rectifier module exports with processing module; And the voltage signal of DC-DC booster circuit output is gathered by the second voltage sensor.
Described direct current generation unit is made up of Industrial Frequency Transformer boost module and three-phase bridge uncontrollable rectifier block coupled in series.
Compared with prior art, advantage of the present invention is:
1, produce the prime rectification of circuit and DC-DC boosting section to high-voltage pulse to divide and carry out soft start and closed-loop control, add stability and the antijamming capability of system cloud gray model, effectively prevent high voltage startup instantaneously to the impact that system causes.
2, three-phase alternating-current supply directly carries out DC-DC and boosts to 1000V after bridge rectifier and filtering, then produce pulse by the action of switching device and be applied to pulse transformer and obtain high-voltage pulse, the circuit structure that high voltage pulse produces is simple, to the requirement of switching device low (operating voltage is low), design and maintenance cost low.
3, HVDC part directly obtains through three-phase uncontrollable rectifier after being boosted by three-phase alternating-current supply, control system mainly concentrates on and produces circuit part to high-voltage pulse, control system is relatively simple, to existing be that the Retrofit of Electrostatic Precipitator of power supply is convenient with HVDC.
Accompanying drawing explanation
Fig. 1 is the overall structure block diagram of electrostatic precipitation direct current pulse power source of the present invention.
Fig. 2 is a specific embodiment of Fig. 1.Wherein, A is the absorption circuit of 6. middle IGBT; B is the absorption circuit of 7. middle IGBT.
Fig. 3 is soft start and the closed loop controlling structure block diagram of three-phase bridge fully controlled rectifier unit in Fig. 1, Fig. 2.
Fig. 4 is soft start and the closed loop controlling structure block diagram of DC-DC booster circuit unit in Fig. 1, Fig. 2.
Detailed description of the invention
As shown in Figure 1, one can jamproof electrostatic precipitation direct current pulse power source, comprise a connection three-phase alternating-current supply main circuit switch 1. 2., connect main circuit switch a direct current generation unit 3. with one impulse generating unit 8., 9. impulse generating unit is connected with a signaling control unit, and 4. 10. the output of direct current generation unit and impulse generating unit be connected to pole plate of dust remover by a direct current and superimposed pulses unit.Wherein, direct current generation unit is made up of Industrial Frequency Transformer boost module and three-phase bridge uncontrollable rectifier block coupled in series; Impulse generating unit successively by three-phase bridge fully controlled rectifier module 5., DC-DC booster circuit 6., 7. pulse boosting module formed.Three-phase alternating-current supply is after main circuit switch, and a road obtains the HVDC that magnitude of voltage is 40kV after the boosting of direct current generation unit and rectification; Another road is under the effect of signaling control unit, through three-phase bridge fully controlled rectifier module, output voltage is risen to gradually by 0V and is stabilized in 500V, again through DC-DC booster circuit, output voltage is risen gradually by 500V and is stabilized in 1000V, under pulse boosting module breaker in middle device activity, produce the pulse that amplitude is 1000V, frequency 250Hz, pulsewidth 10 μ s, obtain through pulse transformer boost the high-voltage pulse that amplitude is 40kV; The high-voltage pulse that the high direct voltage that 10. direct current generation unit exports by last direct current and superimposed pulses unit and impulse generating unit export superposes after-applied on electrostatic precipitator pole plate.
As shown in Figure 2,3. direct current generation unit is made up of Industrial Frequency Transformer boost module and three-phase bridge uncontrollable rectifier module (high voltage silicon rectifier stack rectifier bridge), three-phase alternating-current supply obtains the HVDC of 40kV again after Industrial Frequency Transformer boosting and high voltage silicon rectifier stack rectification through capacitance-resistance filter, this HVDC superposes after-applied to pole plate of dust remover through direct current with superimposed pulses unit with high-voltage pulse, by direct current and superimposed pulses circuit, when HVDC can be avoided to start, system is produced and impact.In the present embodiment, the high direct voltage that direct current generation unit exports is 40kV, also can, by increasing three phase ac controller in front end, make output DC voltage value adjustable between 0V to 40kV.
9. signaling control unit comprises signal and controls and processing module, the control system power supply module providing electric energy for this module, wherein, control system power supply module is a wattage transformer and multiple Switching Power Supply composition, it can be DSP that signal controls with processing module, can be analog circuit board, also can be both combinations.Signal controls to export point three tunnels with the control of processing module, respectively: connect three-phase bridge fully controlled rectifier module by phase shift trigger and 5., by IGBT1 trigger board connection DC-DC booster circuit 6., by IGBT2 trigger board connect pulse boosting module 7..Signal control with processing module gather by the first voltage sensor the voltage signal that three-phase bridge fully controlled rectifier module exports; And the voltage signal of DC-DC booster circuit output is gathered by the second voltage sensor.
5. three-phase bridge fully controlled rectifier module is made up of three-phase isolation transformer and controllable silicon rectifying bridge, this module soft start is set by signaling control unit and closed-loop control is carried out to this module, its control principle is as shown in Figure 3: when three-phase bridge fully controlled rectifier module starts, signal controls to provide a road soft-start signal with processing module, after conditioning, carry out PI adjustment to three-phase bridge fully controlled rectifier module output signal (through the first voltage sensor), output valve and the soft-start signal of PI get the control signal of smaller value as phase shift trigger more afterwards simultaneously.During owing to starting, rectification exports very little, and after PI regulates, output valve is very large, is greater than soft-start signal, and after thus starting, in a period of time, the control voltage of phase shift trigger is provided by soft-start signal, thus realizes the soft start of three-phase bridge fully controlled rectifier module.And when this module output voltage rises to certain value gradually, PI output valve reduces, as long as the final value of setting soft-start signal is greater than the PI output valve of expection, then when PI output valve is less than soft-start signal, PI exports as phase shift trigger provides control voltage V
c, control voltage V
cafter phase shift trigger, obtain Trigger Angle α, Trigger Angle puts on rectifier bridge and obtains new rectifier output voltage, thus realizes the closed-loop control of three-phase bridge fully controlled rectifier module.After three-phase bridge fully controlled rectifier module starts, output voltage is risen to gradually by 0V and is stabilized in 500V.Three-phase bridge fully controlled rectifier module output voltage is relevant with controling parameters, considers actual needs, by changing controling parameters V
ref(comparative voltage), can be stabilized in the arbitrary value between 200V to 600V by rectifier output voltage.
The typical Boost circuit that 6. DC-DC booster circuit is made up of inductance, switching device IGBT1 and diode, it does boosting inverter to previous stage three-phase bridge fully controlled rectifier module output voltage, simultaneously for rear stage pulse boosting module provides basic voltage, control arrange DC-DC booster circuit soft start and carry out closed-loop control to this circuit with processing module by signal, its control principle as shown in Figure 4:
The output voltage of DC-DC booster circuit to three-phase bridge fully controlled rectifier module does process of further boosting, after three-phase bridge fully controlled rectifier module stability, start DC-DC booster circuit, signal control is same with processing module provides a road soft-start signal, the voltage (through the second voltage sensor) simultaneously exported DC-DC booster circuit carries out PI adjustment after nursing one's health, output valve and the soft-start signal of PI get the control signal of smaller value as PWM device more afterwards, and PWM device exports the PWM ripple of duty ratio corresponding.DC-DC booster circuit soft start and loop control theory similar to three-phase fully-controlled rectifying part, export very little when namely starting after boosting, after regulating, the output valve of PI is very large, be greater than soft-start signal, thus after starting, in a period of time, the control voltage of PWM device is provided by soft-start signal, thus realize the soft start of booster circuit, and when booster circuit output voltage rises to certain value gradually, PI output valve reduces, as long as the final value of setting soft-start signal is greater than the PI output valve of expection, then when PI output valve is less than soft-start signal, PI exports as PWM device provides control voltage, thus realize the closed-loop control of booster circuit.After DC-DC booster circuit starts, output voltage is risen to gradually by 500V and is stabilized in 1000V.
DC-DC booster circuit output voltage is relevant with controling parameters and three-phase bridge fully controlled rectifier module output voltage, consider actual needs, by changing controling parameters and three-phase bridge fully controlled rectifier module output voltage values, can by DC-DC booster circuit output voltage stabilization between 200V to 1500.
7. pulse boosting module is made up of switching device IGBT2 and pulse transformer.On the basis of the 1000V DC voltage provided in previous stage DC-DC booster circuit, control to export with processing module certain control signal (the PWM ripple that frequency is 250Hz, pulsewidth is 10 μ s) by signal, the break-make of gauge tap device thus produce respective frequencies and pulsewidth, amplitude are the action of low-voltage pulse of 1000V, this pulse puts on and pulse transformer obtains respective frequencies after pulse transformer boost and pulsewidth, amplitude are the high-voltage pulse of 40kV.Pulse frequency and the pulsewidth of the generation of this pulse boosting module are all adjustable, pulse frequency 100Hz ~ 500Hz is adjustable, limit by pulse transformer operating frequency, frequency optimum traffic 300Hz, pulsewidth is adjustable between 1 μ s ~ 100 μ s as required, best effort pulsewidth is 10 μ s, and pulse amplitude affects by DC-DC booster circuit output voltage, and adjustable extent is 8kV ~ 60kV.
Claims (4)
1. one kind can jamproof electrostatic precipitation direct current pulse power source, comprise the main circuit switch of a connection three-phase alternating-current supply, it is characterized in that, three-phase alternating current is after main circuit switch, and a road obtains the high direct voltage that magnitude of voltage is not more than 60kV after a direct current generation unit boosting and rectification; Under the control of another Lu Yi signaling control unit, through the high-voltage pulse that an impulse generating unit output frequency is 100 ~ 500Hz, pulsewidth is not more than 100 μ s, amplitude is no more than 60kV, the high direct voltage that this high-voltage pulse and direct current generation unit export is applied on electrostatic precipitator pole plate after jointly synthesizing in a direct current and superimposed pulses unit.
2. as claimed in claim 1 can jamproof electrostatic precipitation direct current pulse power source, it is characterized in that, described impulse generating unit is successively by three-phase bridge fully controlled rectifier module, DC-DC booster circuit, pulse boosting module composition, wherein, under the control of signaling control unit, input voltage is risen to 200 ~ 600V by 0V and is stabilized in this value by three-phase bridge fully controlled rectifier module gradually, again through DC-DC booster circuit, output voltage rises to 500 ~ 1500V gradually and is stabilized in this value, finally in pulse boosting module, producing frequency is 100 ~ 500Hz, pulsewidth is not more than 100 μ s, amplitude is no more than the high-voltage pulse of 60kV, export direct current and superimposed pulses unit to.
3. as claimed in claim 2 can jamproof electrostatic precipitation direct current pulse power source, it is characterized in that, described signaling control unit comprises signal and controls and processing module, the control system power supply module providing electric energy for this module, described signal controls to export point three tunnels with the control of processing module, respectively: connect three-phase bridge fully controlled rectifier module by phase shift trigger; DC-DC booster circuit is connected by IGBT1 trigger board; Connect pulse boosting module by IGBT2 trigger board, signal controls to gather by the first voltage sensor the voltage signal that three-phase bridge fully controlled rectifier module exports with processing module; And the voltage signal of DC-DC booster circuit output is gathered by the second voltage sensor.
4. as claimed in claim 1 can jamproof electrostatic precipitation direct current pulse power source, it is characterized in that, described direct current generation unit is made up of Industrial Frequency Transformer boost module and three-phase bridge uncontrollable rectifier block coupled in series.
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Cited By (9)
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| CN105709935A (en) * | 2016-04-25 | 2016-06-29 | 厦门绿洋电气有限公司 | Pulsed power supply for electrostatic dust collection and generation method of pulsed power supply |
| CN106492990A (en) * | 2016-10-14 | 2017-03-15 | 江苏绿洁节能有限公司 | A kind of high-frequency high-voltage dust removing power supply |
| CN106900135A (en) * | 2017-04-10 | 2017-06-27 | 中国科学院电工研究所 | A kind of nanosecond pulse for plasma igniting is superimposed continuous-current plant |
| CN107309087A (en) * | 2017-08-10 | 2017-11-03 | 环球国合（北京）低碳环保科技有限公司 | A kind of electromagnetism ash-cleaning type electric precipitation |
| CN107398351A (en) * | 2017-08-10 | 2017-11-28 | 许玉蕊 | High-performance air purifier |
| CN110420758A (en) * | 2019-07-17 | 2019-11-08 | 武汉东城新能源有限公司 | A kind of high power DC superimposed pulse power supply |
| CN111565853A (en) * | 2017-10-09 | 2020-08-21 | 夸普瑞典公司 | High-voltage power supply system |
| CN112452085A (en) * | 2020-10-30 | 2021-03-09 | 武汉慕都环境科技有限公司 | Automatic dust removal control system and method |
| WO2023025179A1 (en) * | 2021-08-27 | 2023-03-02 | 北京北方华创微电子装备有限公司 | Power source assembly, and plasma immersion ion implantation device and method for using same |
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| CN105709935A (en) * | 2016-04-25 | 2016-06-29 | 厦门绿洋电气有限公司 | Pulsed power supply for electrostatic dust collection and generation method of pulsed power supply |
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| CN106900135A (en) * | 2017-04-10 | 2017-06-27 | 中国科学院电工研究所 | A kind of nanosecond pulse for plasma igniting is superimposed continuous-current plant |
| CN107309087A (en) * | 2017-08-10 | 2017-11-03 | 环球国合（北京）低碳环保科技有限公司 | A kind of electromagnetism ash-cleaning type electric precipitation |
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| CN110420758A (en) * | 2019-07-17 | 2019-11-08 | 武汉东城新能源有限公司 | A kind of high power DC superimposed pulse power supply |
| CN112452085A (en) * | 2020-10-30 | 2021-03-09 | 武汉慕都环境科技有限公司 | Automatic dust removal control system and method |
| CN112452085B (en) * | 2020-10-30 | 2022-07-15 | 武汉慕都环境科技有限公司 | Automatic dust removal control system and method |
| WO2023025179A1 (en) * | 2021-08-27 | 2023-03-02 | 北京北方华创微电子装备有限公司 | Power source assembly, and plasma immersion ion implantation device and method for using same |
| TWI823533B (en) * | 2021-08-27 | 2023-11-21 | 大陸商北京北方華創微電子裝備有限公司 | Power supply assembly, plasma immersion ion implantation device and method |
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