CN209748425U - 220kV ultrahigh-voltage electrostatic dust removal power supply - Google Patents
220kV ultrahigh-voltage electrostatic dust removal power supply Download PDFInfo
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- CN209748425U CN209748425U CN201920193839.XU CN201920193839U CN209748425U CN 209748425 U CN209748425 U CN 209748425U CN 201920193839 U CN201920193839 U CN 201920193839U CN 209748425 U CN209748425 U CN 209748425U
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Abstract
The utility model provides a 220kV superhigh pressure electrostatic precipitator power, it obtains the twelve pulse wave superhigh pressure direct current of 220kV through the twelve pulse wave rectifier transformer of six-phase and after establishing ties the three-phase rectifier bridge. The utility model discloses reduced the ripple coefficient of dust removal power, improved the corona power of dust remover, increased the driving speed of dust, improved dust collection efficiency, the effectual pollution that reduces the low order harmonic to the electric wire netting has played energy-concerving and environment-protective effect simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the power, concretely relates to 220kV superhigh pressure electrostatic precipitator power, it is applicable to the dedicated dust removal power of electrostatic precipitator in metallurgy, chemical industry, the energy field.
Background
The electrostatic dust collector is a dust collector which utilizes a high-voltage strong electric field to enable corona discharge to occur between a cathode and an anode in a dust collection body, gas is ionized to generate a large amount of ions and electrons, and accordingly dust particles are charged, and the dust particles move to the two electrodes and are collected under the action of the electric field force. The dust removal efficiency of the electrostatic dust collector depends on the driving speed of dust, and the driving speed of the dust is in direct proportion to the corona power, so that the corona power of the dust collector is required to be increased as much as possible to improve the dust removal efficiency of the electrostatic dust collector.
most of high-voltage generators of the traditional electrostatic dust collector adopt three-phase bridge type six-pulse wave rectification to obtain direct-current high voltage, the direct-current high-voltage ripple factor output by the power supply is large, the sparking rate is high, higher voltage level is difficult to generate, and a large amount of low-order harmonic waves can be generated to pollute a power grid.
Therefore, in order to improve the dust removal efficiency of the electrostatic dust collector, a power supply system suitable for the electrostatic dust removal system needs to be developed.
SUMMERY OF THE UTILITY MODEL
Based on prior art, the utility model provides a 220kV superhigh pressure electrostatic precipitator power, it can reduce the highly compressed ripple coefficient of electrostatic precipitator power direct current, eliminates the low order harmonic, increases the corona power of dust remover, improves the drive-in speed of dust, and then improves the superhigh pressure electrostatic precipitator power of dust remover dust collection efficiency.
According to the technical scheme of the utility model, a 220kV ultrahigh voltage electrostatic dust collection power supply is provided, which is used for supplying power to an electrostatic dust collection load body; it uses 220kV ultra-high voltage power supply and uses a six-phase twelve-pulse rectifier transformer.
The dust removal power supply comprises a six-phase twelve-pulse rectifier transformer T, a three-phase rectifier bridge DB1, a three-phase rectifier bridge DB2, a fast recovery diode D1 and a fast recovery diode D2; the primary side of a six-phase twelve-pulse rectifier transformer T is connected with the input end of a power grid, a high-voltage winding at the upper end of the secondary side is connected with the input end of a three-phase rectifier bridge DB1 after adopting a triangular connection mode, and a high-voltage winding at the lower end is connected with the input end of a three-phase rectifier bridge DB2 after adopting a star connection mode; the diode D1 is connected in parallel with the DC output end of the three-phase rectifier bridge DB1, and the diode D2 is connected in parallel with the DC output end of the three-phase rectifier bridge DB 2.
Furthermore, the six-phase twelve-pulse wave rectifier transformer T comprises an iron core and three-phase windings wound on the iron core, each phase of the three-phase windings is divided into a low-voltage winding and two high-voltage windings, wherein the high-voltage windings at the upper end are connected in a triangular mode, the high-voltage windings at the lower end are connected in a star mode, and the phase difference of output voltages is 30 degrees. Furthermore, the dc output terminal of the three-phase rectifier bridge DB1 is connected in parallel with the diode D1, and the dc output terminal of the three-phase rectifier bridge DB2 is connected in parallel with the diode D2.
Compared with the prior art, the utility model discloses a 220kV superhigh pressure electrostatic precipitator power is through using twelve pulse wave rectifier transformer of six-phase, and the effectual ripple coefficient that reduces dust removal power direct current high-voltage side eliminates the low order harmonic, has promoted corona power greatly. And then increased the speed of driving in of dust, improved the dust removal effect of dust remover, avoided the pollution of traditional power to the electric wire netting simultaneously.
Drawings
Fig. 1 is a circuit diagram of the 220kV ultra-high voltage electrostatic dust collection power supply of the present invention.
FIG. 2 is a schematic diagram of the system structure of the electrostatic precipitator.
Fig. 3 is a cross-sectional view a of the electrostatic precipitator body.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Additionally, the scope of the present invention should not be limited to the particular structures or components described below or to the particular parameters.
The principle of the utility model is that six-phase twelve-pulse rectifier transformer is adopted, and the winding three-phase winding is respectively divided into a low-voltage winding and two high-voltage windings on an iron core, wherein the three-phase high-voltage winding of upper end adopts the triangle-shaped connection, and lower extreme three-phase high-voltage winding adopts the star connection. Since the line voltage exceeds the phase voltage by 30 ° and is v 3 times the value of the phase voltage, the number of turns of the upper three-phase high-voltage winding adopting delta connection is v 3 times that of the lower star-connected high-voltage winding, so that two six-pulse direct-current high voltages with an effective value of 110kV but with a phase difference of 30 ° are obtained after three-phase rectification. Two six-pulse direct-current high voltages with 30-degree phase difference are superposed at the serially connected rectifier bridge, and the 220kV twelve-pulse direct-current high voltage with smaller ripple factor is obtained.
The ultrahigh-voltage electrostatic dust collection power supply comprises a six-phase twelve-pulse rectifier transformer T, a three-phase rectifier bridge DB1, a three-phase rectifier bridge DB2, a fast recovery diode D1 and a fast recovery diode D2; the primary side of a six-phase twelve-pulse rectifier transformer T is connected with the input end of a power grid, and the upper-end high-voltage winding and the lower-end high-voltage winding of the secondary side are respectively connected with the input ends of three-phase rectifier bridges DB1 and DB2 in a delta connection and star connection mode;
Diodes D1 and D2 of the ultrahigh-voltage electrostatic dust removal power supply are connected with the direct-current output ends of the three-phase rectifier bridges DB1 and DB2 in parallel respectively, so that the problem of abnormal follow current of the series connection of the three-phase rectifier bridges DB1 and DB2 can be effectively solved. Meanwhile, the series rectifier bridge also solves the bottleneck that a single rectifier bridge can only obtain 110kV direct-current high voltage due to the limitation of devices, and the direct-current voltage is improved to 220 kV.
As shown in fig. 1, the 220kV ultra-high voltage electrostatic precipitator power supply comprises a six-phase twelve-pulse rectifier transformer T, a three-phase rectifier bridge DB1, a three-phase rectifier bridge DB2, a fast recovery diode D1 and a fast recovery diode D2; a six-phase twelve-pulse rectifier transformer T is connected with the input end of a power grid on the primary side A, B, C, a high-voltage winding on the upper end of the secondary side is connected with the three-phase input end of DB1 in a triangular mode and then connected with a1, b1 and c1, and a high-voltage winding on the lower end of the secondary side is connected with the three-phase input end of DB2 in a star mode and then connected with a2, b2 and c 2; the anode of the ultrahigh voltage electrostatic dust collection power diode D1 is connected with the negative high voltage output end-HV of DB1, and the cathode is connected with the negative high voltage output end f of DB 2; the anode of the ultrahigh voltage electrostatic dust collection power diode D2 is connected with the negative high voltage output end f of DB2, and the cathode is connected with the grounding end E of DB 2;
The implementation method of the 220kV ultrahigh-voltage electrostatic dust removal power supply comprises the steps of sending three-phase power to the input end of a six-phase twelve-pulse rectifier transformer T, obtaining alternating-current high voltages with equal effective values and 30-degree phase difference after passing through an upper end high-voltage winding in triangular connection and a lower end high-voltage winding in star connection, obtaining two groups of six-pulse direct-current high voltages with 30-degree phase difference after passing through a three-phase rectifier bridge respectively, and superposing the two groups of six-pulse direct-current high voltages with 30-degree phase difference at DB1 and DB2, so that the twelve-pulse direct-current high voltages with smaller ripple coefficients are obtained.
As shown in fig. 2, the electrostatic precipitator body includes a grounding pile, a cathode filament, an anode honeycomb, etc., the power supply includes a power cabinet and a high voltage generator, the twelve-pulse direct current high voltage-HV of the power supply is connected with the cathode filament, and the grounding end E is connected with the anode honeycomb and the grounding pile of the body and is reliably grounded. Thus, the high-voltage electric field generated by the high-voltage direct current between the cathode and the anode in fig. 3 effectively acts on the smoke flowing through. Therefore, the utility model discloses a produced superhigh pressure of 220kV superhigh pressure electrostatic precipitator power will increase the speed that the positive pole honeycomb was driven into to the dust collection efficiency of electrostatic precipitator is effectively promoted.
The utility model discloses a 220kV superhigh pressure electrostatic precipitator power, the ripple coefficient is little, is favorable to promoting DC voltage's level, adapts to various operating modes simultaneously, makes dust collection efficiency reach the highest.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (2)
1. A220 kV ultrahigh-voltage electrostatic dust removal power supply is characterized by being used for supplying power to an electrostatic dust removal load body; the device uses 220kV ultrahigh voltage electrostatic power supply and uses a six-phase twelve-pulse rectifier transformer; the dedusting power supply further comprises a three-phase rectifier bridge DB1, a three-phase rectifier bridge DB2, a fast recovery diode D1 and a fast recovery diode D2; the primary side of the six-phase twelve-pulse rectifier transformer is connected with the input end of a power grid, the upper-end high-voltage winding of the secondary side is connected with the input end of a three-phase rectifier bridge DB1 after adopting a triangular connection mode, and the lower-end high-voltage winding is connected with the input end of a three-phase rectifier bridge DB2 after adopting a star connection mode; the diode D1 is connected in parallel with the DC output end of the three-phase rectifier bridge DB1, and the diode D2 is connected in parallel with the DC output end of the three-phase rectifier bridge DB 2.
2. The 220kV extra-high voltage electrostatic precipitator power supply according to claim 1, wherein the six-phase twelve-pulse rectifier transformer comprises an iron core and three-phase windings wound on the iron core, each phase of the three-phase windings is divided into a low-voltage winding and two high-voltage windings, the upper-end high-voltage windings are connected in a delta shape, the lower-end high-voltage windings are connected in a star shape, and the output voltages are different in phase by 30 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920193839.XU CN209748425U (en) | 2019-02-13 | 2019-02-13 | 220kV ultrahigh-voltage electrostatic dust removal power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920193839.XU CN209748425U (en) | 2019-02-13 | 2019-02-13 | 220kV ultrahigh-voltage electrostatic dust removal power supply |
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| CN209748425U true CN209748425U (en) | 2019-12-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768715A (en) * | 2019-02-13 | 2019-05-17 | 襄阳九鼎昊天环保设备有限公司 | A kind of 220kV super-pressure static dust-removing power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768715A (en) * | 2019-02-13 | 2019-05-17 | 襄阳九鼎昊天环保设备有限公司 | A kind of 220kV super-pressure static dust-removing power |
| CN109768715B (en) * | 2019-02-13 | 2024-03-19 | 襄阳九鼎昊天环保设备有限公司 | 220kV ultrahigh-voltage electrostatic dust collection power supply |
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