CN119382533A - Power supply device for electrostatic precipitator and power supply method for electrostatic precipitator - Google Patents
Power supply device for electrostatic precipitator and power supply method for electrostatic precipitator Download PDFInfo
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Abstract
本发明涉及一种静电除尘用供电装置及供电方法，供电装置包括：交流输出电路、升压电路和第一整流电路；电流输出电路包括第一交流输出电路和第二交流输出电路；升压电路包括第一升压电路和第二升压电路；第一交流输出电路的输出端与第一升压电路的输入端连接，第二交流输出电路的输出端与第二升压电路的输入端连接；第一整流电路包括第一桥式整流电路和第二桥式整流电路。该供电装置能够通过控制系统切换不同的供电模式，以更好地适应电除尘器工况的变化。能够通过直流电压叠加窄脉冲电压，提高峰值电场强度，能有效地降低极板粉尘层的电压降，抑制高比电阻引发的反电晕的产生，提高除尘效率。
The present invention relates to a power supply device and a power supply method for electrostatic precipitator, wherein the power supply device comprises: an AC output circuit, a boost circuit and a first rectifier circuit; the current output circuit comprises a first AC output circuit and a second AC output circuit; the boost circuit comprises a first boost circuit and a second boost circuit; the output end of the first AC output circuit is connected to the input end of the first boost circuit, and the output end of the second AC output circuit is connected to the input end of the second boost circuit; the first rectifier circuit comprises a first bridge rectifier circuit and a second bridge rectifier circuit. The power supply device can switch different power supply modes through a control system to better adapt to changes in the working conditions of the electrostatic precipitator. The peak electric field strength can be increased by superimposing a narrow pulse voltage on a DC voltage, the voltage drop of the plate dust layer can be effectively reduced, the generation of back corona caused by high specific resistance can be suppressed, and the dust removal efficiency can be improved.
Description
Technical Field
The invention relates to a power supply device for electrostatic dust collection and a power supply method of an electrostatic dust collector, belonging to a power source used by the electrostatic dust collection device.
Background
The working principle of the electric dust collector is that a dust-removing high-voltage direct-current power supply is used for supplying power to an electric field, so that ionization occurs when smoke passes through the electric field, dust charge in the air flow is separated from the air flow under the action of the electric field, a large number of particles with negative charges move towards a dust collecting plate under the action of the electric field, and fall off after being trapped in the electrode plate. The electric dust remover is the leading technical equipment for efficiently treating flue gas and dust in the industries of coal-fired power plants, metallurgy, building materials, chemical industry and the like. The high-voltage power supply is used as core equipment of the electric dust remover, and plays an extremely important supporting role in industry improvement, energy conservation and emission reduction.
The DC power supply device of the electric dust collector at the present stage mainly comprises a single-phase power frequency power supply, a three-phase power supply, a high-frequency power supply and the like. The single-phase power frequency power supply has been phased out for use because of the disadvantages of low power factor, low dust collection efficiency, overlarge wave coefficient of the power supply voltage waveform (the average value and the peak value have a 20% -30% difference). The three-phase power supply has relatively high power factor and small voltage waveform ripple coefficient (about 5%), but has large impact current during flashover and poor flashover control characteristic due to the characteristics of a three-phase power supply circuit, and in order to avoid equipment damage, the operation parameters are usually set to be lower, and meanwhile, the intermittent pulse power supply technology of the three-phase power supply cannot adapt to working condition change and has lower dust removal efficiency. The high-frequency power supply is considered as one of the most ideal dedusting power supplies at the present stage, has the characteristics of small output ripple when in pure direct current power supply and intermittent ratio of any adjustable when in intermittent power supply, but has the problems of high-frequency heat generation, difficult capacity improvement and the like.
One compartment of an electric precipitator typically has a plurality of electric fields. Taking four electric fields as an example, the first electric field needs a large current to facilitate dust charge, and the fourth electric field needs a high voltage to strengthen the dust collection of the rear electric field due to the characteristic of flue gas and dust (small dust radius). The existing power supply is limited by the topological structure and the power design, is insufficient in large current capacity of the first electric field, and cannot provide high voltage to influence dust removal efficiency when the fourth electric field is used for treating working conditions containing fine particle dust.
The electric precipitator shows high sensitivity to differences in coal types, ash characteristics and flue gas conditions during operation. The coal types used by domestic coal-fired boilers are various and complex, the working conditions are changeable, and the power supply mode of the existing power supply is single, so that the coal types are difficult to fully adapt to the changing requirements of the electric dust collector under the complex working conditions.
The Chinese patent application No. CN201910113254.7 discloses a 220kV ultrahigh voltage electrostatic dust collection power supply, which is obtained by a six-phase twelve-pulse wave rectifier transformer and a three-phase rectifier bridge connected in series. However, the power supply cannot change the power supply mode according to the electrostatic dust collection environment, and cannot cope with complex electrostatic dust collection scenes.
Disclosure of Invention
In order to overcome the problems, the present disclosure provides a power supply device for electrostatic dust collection and a power supply method for an electrostatic dust collector.
First aspect
A power supply device for electrostatic dust collection comprises an alternating current output circuit, a booster circuit and a first rectifying circuit;
The current output circuit comprises a first alternating current output circuit and a second alternating current output circuit;
the boost circuit comprises a first boost circuit and a second boost circuit;
the output end of the first alternating current output circuit is connected with the input end of the first boost circuit, and the output end of the second alternating current output circuit is connected with the input end of the second boost circuit;
the first rectifying circuit comprises a first bridge rectifying circuit and a second bridge rectifying circuit;
The first output end and the second output end of the first boost circuit are connected with the first port and the third port of the first bridge rectifier circuit, the second port of the first bridge rectifier circuit is optionally grounded or connected with a first contact, and the fourth port of the first bridge rectifier circuit is connected with the input end of the electrostatic precipitator;
The first output end and the second output end of the second boost circuit are connected with the first port and the third port of the second bridge rectifier circuit, the second port of the second bridge rectifier circuit is grounded, and the fourth port of the second bridge rectifier circuit can be selectively connected with the input end of the electrostatic precipitator or the first contact;
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the power supply device further includes a second rectifying circuit, where the second rectifying circuit is connected to an ac power supply, and rectifies ac power into dc power;
the first alternating current output circuit and the second alternating current output circuit are full-bridge inverter circuits;
The first alternating current output circuit and the second alternating current output circuit convert direct current output by the second rectifying circuit into alternating current and output the alternating current.
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the first ac output circuit includes a first IGBT, a second IGBT, a third IGBT, and a fourth IGBT;
The collector of the first IGBT is connected with a direct current positive electrode, and the emitter of the first IGBT is connected with the collector of the third IGBT;
the collector of the second IGBT is connected with the direct current positive electrode, and the emitter of the second IGBT is connected with the collector of the fourth IGBT;
the emitters of the third IGBT and the fourth IGBT are connected with a direct current negative electrode;
The bases of the first IGBT, the second IGBT, the third IGBT and the fourth IGBT are all connected with a control unit;
The second alternating current output circuit comprises a fifth IGBT, a sixth IGBT, a seventh IGBT and an eighth IGBT;
the collector of the fifth IGBT is connected with a direct current positive electrode, and the emitter of the fifth IGBT is connected with the collector of the seventh IGBT;
The collector of the sixth IGBT is connected with a direct current positive electrode, and the emitter of the sixth IGBT is connected with the collector of the eighth IGBT;
The emitters of the seventh IGBT and the eighth IGBT are connected with a direct current negative electrode;
And the bases of the fifth IGBT, the sixth IGBT, the seventh IGBT and the eighth IGBT are all connected with a control unit.
In the power supply device for electrostatic dust collection according to at least one embodiment of the present disclosure, the ac input to the second rectifying circuit is three-phase power.
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the second rectifying circuit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode;
the anode of the first diode is connected with the cathode of the second diode and the first phase of three-phase electricity;
The anode of the third diode is connected with the cathode of the fourth diode and the second phase of the three-phase power;
The anode of the fifth diode is connected with the cathode of the sixth diode and a third phase of three-phase electricity.
In the power supply device for electrostatic dust collection according to at least one embodiment of the present disclosure, a filter circuit is disposed between the second rectifying circuit and the ac output circuit.
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the filter circuit includes a coil and a capacitor C1, one end of the capacitor C1 is connected to the positive output end of the second rectifying circuit through the coil, and the other end is connected to the negative output end of the second rectifying circuit.
Second aspect
The power supply device for electrostatic dust collection supplies power to the electrostatic dust collector, and comprises a power supply unit for supplying power to the electrostatic dust collector by direct-current voltage parallel power supply or direct-current voltage series power supply;
When the direct-current voltage is used for supplying power in parallel, the second port of the first bridge type rectifying circuit is grounded, and the fourth port of the second bridge type rectifying circuit is connected with the input end of the electric dust collector;
When the direct-current voltage is used for supplying power in series, the second port of the first bridge rectifier circuit is connected with the first contact, the fourth port of the second bridge rectifier circuit is connected with the first contact, and the control unit applies the same first control signal to each IGBT of the first alternating-current output circuit and the second alternating-current output circuit to control the periodic disconnection and connection of each IGBT, and the disconnection and connection time is the same.
In the power supply method of the electrostatic precipitator provided by at least one embodiment of the present disclosure, the method further includes supplying power to the electrostatic precipitator by superimposing a narrow pulse voltage on a direct current voltage;
When power is supplied by superposing direct-current voltage with narrow pulse voltage, a second port of the first bridge rectifier circuit is connected with the first contact, and a fourth port of the second bridge rectifier circuit is connected with the first contact;
The control unit periodically applies a third control signal to the second alternating current output circuit, the third control signal comprises a conducting area and a disconnecting area, the conducting area controls the switching-off and the switching-on of each IGBT of the second alternating current output circuit periodically, the period, the switching-on time and the switching-off time are identical to the second control signal, and the disconnecting area controls the switching-off of each IGBT of the second alternating current output circuit.
Third aspect of the invention
According to the intelligent control method of the power supply device for electrostatic dust collection, the power supply method of the electrostatic dust collection is used for controlling the power supply device for electrostatic dust collection, and the switching frequency of the IGBT is controlled and different power supply modes are switched according to the operation working condition of the electrostatic dust collection:
Calculating the collection efficiency eta of the electrostatic dust collection smoke dust:
wherein e is a constant, A is the area of a dust collecting polar plate, Q is the flue gas amount, omega is the dust driving speed, and the method specifically comprises the following steps:
ω=β·Vp·Vm;
wherein, beta is a constant, vp is a secondary voltage peak value, vm is a secondary voltage average value;
The electrostatic dust collector comprises an electrostatic dust collector, a power supply device, a series power supply device, a control device and a control device, wherein the electrostatic dust collector is used for boosting in a boosting stage by adopting a parallel power supply mode and judging whether an electric field is flashover or not;
In a stable stage, when the device is in a serial power supply mode, respectively adopting a direct current power supply mode and a pulse power supply mode, adjusting the switching frequency of each IGBT to obtain different secondary voltage amplitude values, adjusting the proportion of a conducting area and a disconnecting area of pulse power supply to obtain different pulse voltage peak values, and comparing the direct current power supply mode with the pulse power supply mode to obtain the condition that the dust driving speed omega is the largest as the optimal operation parameter;
When the back corona phenomenon occurs in the electrostatic precipitator, switching to a pulse power supply mode, and adjusting operation parameters until the back corona phenomenon disappears;
When frequent flashover or short circuit occurs in the electrostatic precipitator, the electrostatic precipitator is switched to a parallel power supply mode, and the flashover current or short circuit current is shunted.
The invention has the following beneficial effects:
The power supply device can switch different power supply modes through the control system so as to better adapt to the change of the working condition of the electric dust collector. The high-power resonance circuit can output high-current and high-voltage direct-current voltage, and effectively improves the charge quantity and charge efficiency of fine dust, so that the collection efficiency of PM2.5 fine particles is greatly improved. By superposing the narrow pulse voltage with the direct current voltage, the peak electric field intensity is improved, the voltage drop of the pole plate dust layer can be effectively reduced, the back corona caused by high specific resistance is restrained, and the dust removal efficiency is improved.
Drawings
Fig. 1 is a circuit diagram of a power supply device according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a dc voltage parallel power supply circuit according to an embodiment of the invention.
Fig. 3 is a dc voltage series power supply circuit diagram according to an embodiment of the invention.
Fig. 4 is a waveform of voltage output in a dc power supply mode according to an embodiment of the present invention.
Fig. 5 is a voltage output model in a pulse power mode according to an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Referring to fig. 1, an aspect of the present disclosure provides a power supply device for electrostatic dust collection, including an ac output circuit, a boost circuit, and a first rectifying circuit;
The current output circuit comprises a first alternating current output circuit and a second alternating current output circuit;
the boost circuit comprises a first boost circuit and a second boost circuit;
the output end of the first alternating current output circuit is connected with the input end of the first boost circuit, and the output end of the second alternating current output circuit is connected with the input end of the second boost circuit;
the first rectifying circuit comprises a first bridge rectifying circuit and a second bridge rectifying circuit;
The first output end and the second output end of the first boost circuit are connected with the first port and the third port of the first bridge rectifier circuit, the second port of the first bridge rectifier circuit is optionally grounded or connected with a first contact, and the fourth port of the first bridge rectifier circuit is connected with the input end of the electrostatic precipitator;
The first output end and the second output end of the second boost circuit are connected with the first port and the third port of the second bridge rectifier circuit, the second port of the second bridge rectifier circuit is grounded, and the fourth port of the second bridge rectifier circuit can be selectively connected with the input end of the electrostatic precipitator or the first contact;
referring to fig. 1, the switches S1 and S2 are on-load voltage-regulating switches, and are provided to switch connection modes of the first bridge rectifier circuit and the second bridge rectifier circuit under load. Meanwhile, the switch S1 and the switch S2 are interlocked, and can be at 1 point or at 2 points at the same time. And the corresponding 2 points of the switch S1 and the switch S2 are the first contact.
Referring to fig. 1, the first bridge rectifier circuit and the second bridge rectifier circuit each include four diodes.
The cathode of the upper right diode is connected with the anode of the upper left diode, the anode is connected with the anode of the lower right diode, the cathode of the lower left diode is connected with the cathode of the upper left diode, and the anode is connected with the cathode of the lower right diode.
In this connection mode, the cathode and the anode of the upper right diode are respectively the first port and the fourth port of the bridge rectifier circuit, and the cathode and the anode of the lower left diode are respectively the second port and the third port of the bridge rectifier circuit.
Referring to fig. 1, there are two groups of resonant circuits consisting of resonant capacitors, transformers and body loads of the precipitator, one group being C2 and T1, the other group being C3 and T2. The current peak value born by the circuit can be greatly improved, the pressure of the IGBT of the key switching element is effectively lightened, and the reliability of the circuit is greatly improved
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the power supply device further includes a second rectifying circuit, where the second rectifying circuit is connected to an ac power supply, and rectifies ac power into dc power;
the first alternating current output circuit and the second alternating current output circuit are full-bridge inverter circuits;
The first alternating current output circuit and the second alternating current output circuit convert direct current output by the second rectifying circuit into alternating current and output the alternating current.
The first alternating current output circuit and the second alternating current output circuit output different alternating currents, so that the output of the narrow pulse voltage can be realized.
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the first ac output circuit includes a first IGBT, a second IGBT, a third IGBT, and a fourth IGBT;
The collector of the first IGBT is connected with a direct current positive electrode, and the emitter of the first IGBT is connected with the collector of the third IGBT;
the collector of the second IGBT is connected with the direct current positive electrode, and the emitter of the second IGBT is connected with the collector of the fourth IGBT;
the emitters of the third IGBT and the fourth IGBT are connected with a direct current negative electrode;
And the bases of the first IGBT, the second IGBT, the third IGBT and the fourth IGBT are all connected with a control unit.
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the second ac output circuit includes a fifth IGBT, a sixth IGBT, a seventh IGBT, and an eighth IGBT;
the collector of the fifth IGBT is connected with a direct current positive electrode, and the emitter of the fifth IGBT is connected with the collector of the seventh IGBT;
The collector of the sixth IGBT is connected with a direct current positive electrode, and the emitter of the sixth IGBT is connected with the collector of the eighth IGBT;
The emitters of the seventh IGBT and the eighth IGBT are connected with a direct current negative electrode;
And the bases of the fifth IGBT, the sixth IGBT, the seventh IGBT and the eighth IGBT are all connected with a control unit.
Each IGBT is an n-channel Fast Recovery (FRD) IGBT, which can meet high frequency switching.
In the power supply device for electrostatic dust collection according to at least one embodiment of the present disclosure, the ac input to the second rectifying circuit is three-phase power.
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the second rectifying circuit includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode;
the anode of the first diode is connected with the cathode of the second diode and the first phase of three-phase electricity;
The anode of the third diode is connected with the cathode of the fourth diode and the second phase of the three-phase power;
The anode of the fifth diode is connected with the cathode of the sixth diode and a third phase of three-phase electricity.
In the power supply device for electrostatic dust collection according to at least one embodiment of the present disclosure, a filter circuit is disposed between the second rectifying circuit and the ac output circuit.
In the power supply device for electrostatic dust collection provided in at least one embodiment of the present disclosure, the filter circuit includes a coil and a capacitor C1, one end of the capacitor C1 is connected to the positive output end of the second rectifying circuit through the coil, and the other end is connected to the negative output end of the second rectifying circuit.
Referring to fig. 1-4, another aspect of the present disclosure provides a method for supplying power to an electrostatic precipitator, where the power supply device for electrostatic precipitator of the present disclosure supplies power to the electrostatic precipitator, including supplying power to the electrostatic precipitator with dc voltage in parallel or dc voltage in series;
Referring to fig. 2 and 4, when power is supplied in parallel through direct-current voltage, a second port of the first bridge rectifier circuit is grounded, a fourth port of the second bridge rectifier circuit is connected with an input end of the electric precipitator, and the control unit applies the same first control signal to the first to eighth IGBTs to control the first to eighth IGBTs to be periodically turned off and on, and the turn-off and turn-on time is the same.
At this time, the first booster circuit and the second booster circuit respectively generate direct-current voltages and then are connected into the ESP in parallel, so that direct-current waveforms of secondary voltage 72KV and secondary current 3A and above can be provided, the load current of the ESP is greatly improved, and the collection amount of dust is improved.
Referring to fig. 3 and 4, when power is supplied in series through direct-current voltage, the second port of the first bridge rectifier circuit is connected with the first contact, the fourth port of the second bridge rectifier circuit is connected with the first contact, and the control unit applies the same first control signal to each IGBT of the first alternating-current output circuit and the second alternating-current output circuit to control the periodic turn-off and turn-on of each IGBT, and the turn-off and turn-on time is the same.
At the moment, the first booster circuit and the second booster circuit respectively generate direct-current voltages and are connected in series to the ESP, so that direct-current pulse high voltage of more than 100KV can be provided, and the charge quantity and the charge efficiency of dust are effectively improved.
Referring to fig. 3 and 5, in the method for supplying power to an electrostatic precipitator according to at least one embodiment of the present disclosure, the method further includes supplying power to the electrostatic precipitator by superimposing a narrow pulse voltage on a dc voltage;
When power is supplied by superposing direct-current voltage with narrow pulse voltage, a second port of the first bridge rectifier circuit is connected with the first contact, and a fourth port of the second bridge rectifier circuit is connected with the first contact;
The control unit periodically applies a third control signal to the second alternating current output circuit, the third control signal comprises a conducting area and a disconnecting area, the conducting area controls the switching-off and the switching-on of each IGBT of the second alternating current output circuit periodically, the period, the switching-on time and the switching-off time are identical to the second control signal, and the disconnecting area controls the switching-off of each IGBT of the second alternating current output circuit.
At this time, the direct current voltage generated by the first booster circuit and the narrow pulse voltage generated by the second booster circuit are connected in parallel and then connected into the ESP, so that the pulse peak voltage of more than 200KV can be provided, the generation of back corona can be restrained, and the collection rate of high-specific-resistance dust is greatly improved.
Third aspect of the invention
According to the intelligent control method of the power supply device for electrostatic dust collection, the power supply method of the electrostatic dust collection is used for controlling the power supply device for electrostatic dust collection, and the switching frequency of the IGBT is controlled and different power supply modes are switched according to the operation working condition of the electrostatic dust collection:
Calculating the collection efficiency eta of the electrostatic dust collection smoke dust:
wherein e is a constant, A is the area of a dust collecting polar plate, Q is the flue gas amount, omega is the dust driving speed, and the method specifically comprises the following steps:
ω=β·Vp·Vm;
wherein, beta is a constant, vp is a secondary voltage peak value, vm is a secondary voltage average value;
The electrostatic dust collector comprises an electrostatic dust collector, a power supply device, a series power supply device, a control device and a control device, wherein the electrostatic dust collector is used for boosting in a boosting stage by adopting a parallel power supply mode and judging whether an electric field is flashover or not;
In a stable stage, when the device is in a serial power supply mode, respectively adopting a direct current power supply mode and a pulse power supply mode, adjusting the switching frequency of each IGBT to obtain different secondary voltage amplitude values, adjusting the proportion of a conducting area and a disconnecting area of pulse power supply to obtain different pulse voltage peak values, and comparing the direct current power supply mode with the pulse power supply mode to obtain the condition that the dust driving speed omega is the largest as the optimal operation parameter;
When the back corona phenomenon occurs in the electrostatic precipitator, switching to a pulse power supply mode, and adjusting operation parameters until the back corona phenomenon disappears;
When frequent flashover or short circuit occurs in the electrostatic precipitator, the electrostatic precipitator is switched to a parallel power supply mode, and the flashover current or short circuit current is shunted.
According to the method, according to the operation working conditions (a boosting stage, a stable stage, whether flashover, back corona and the like) of the electric dust collector, the operation voltage is improved, the generation of the back corona is restrained, and the dust collection efficiency of the electric dust collector is improved by controlling the switching frequency of the IGBT, switching different power supply modes and the like.
When the back corona phenomenon exists, the pulse power supply mode is automatically switched, and the position of the inflection point of the back corona is calculated according to the volt-ampere curve to find the most suitable operation parameters so as to inhibit the back corona phenomenon, and the back corona energy-saving device has good energy-saving characteristics.
When frequent flashover or short circuit occurs due to working condition change of the electric dust collector, the equipment is automatically switched to a parallel power supply mode, flashover current or short circuit current is split, impact on a transformer and electronic devices is reduced, and equipment stability is improved.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures made by the description of the invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411473004.1A CN119382533A (en) | 2024-10-22 | 2024-10-22 | Power supply device for electrostatic precipitator and power supply method for electrostatic precipitator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411473004.1A CN119382533A (en) | 2024-10-22 | 2024-10-22 | Power supply device for electrostatic precipitator and power supply method for electrostatic precipitator |
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| CN119382533A true CN119382533A (en) | 2025-01-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |