Method for testing and inhibiting electric precipitation back corona phenomenon

A technology of anti-corona and electric dust removal, applied in the direction of electrostatic separation, etc., to achieve the effect of suppressing the phenomenon of anti-corona, improving dust removal efficiency, and reducing energy consumption

Inactive Publication Date: 2010-02-24
ZHEJIANG UNIV
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Problems solved by technology

However, it takes a long time to observe the changes of the turbidity meter and try repeatedly to get reasonable power supply parameters; and when the working conditions change, such as the decrease of dust flow, the increase of humidity, and the increase of temperature, the current power supply parameters not necessarily optimal

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  • Method for testing and inhibiting electric precipitation back corona phenomenon
  • Method for testing and inhibiting electric precipitation back corona phenomenon
  • Method for testing and inhibiting electric precipitation back corona phenomenon

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Embodiment Construction

[0050] Such as figure 2 As shown, the structure of the electrostatic precipitator control system can be divided into three parts: the microprocessor 1, the execution unit 2 and the precipitator body 3; the microprocessor 1 includes a data acquisition unit 11, a control algorithm unit 12 and an output control unit 13 . One end of the execution unit 2 is connected to the output control unit 13 , and the other end is connected to the dust collector body 3 .

[0051] The data acquisition unit 11 is responsible for collecting the voltage and current data of the secondary side, and transmits the calculated average value and peak value of the voltage to the control algorithm unit 12 , and transmits the calculated average value of the current to the output control unit 13 . The output control unit 13 is responsible for adjusting the conduction angle of the thyristor according to the feedback current; the output of the execution unit 2 is boosted by the transformer, and then added to...

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Abstract

The invention discloses a method for detecting electrostatic dedusting back corona phenomenon, which includes the following steps: (1) adjusting conduction angle of the thyristor to slowly increase asecondary side current, and acquiring the secondary side voltage peak value of each semiwave, and the secondary side voltage average value of each semiwave; and (2) determining that the back corona phenomenon occurs if the secondary side voltage peak value is always increased and the secondary side voltage mean value is increased then decreased or constant. The invention also provides a method forinhibiting the electrostatic dedusting back corona phenomenon using the detecting method, which comprises periodically adjusting the intermittent power supply ratio and the charging current if the back corona phenomenon is determined to occur. By using the inventive method, energy consumption can be reduced and dedusting efficiency can be improved.

Description

technical field [0001] The invention relates to a method for detecting and suppressing the back corona phenomenon, which is used for improving the dust removal efficiency of an electric dust collector for dust with high specific resistance. Background technique [0002] The electrostatic precipitator is a device that removes dust from dusty gas through a high-voltage electric field. Under the action of the electric field force, the charged dust particles are deposited on the electrodes, thereby separating the dust particles from the dust-containing gas; the purified air is discharged through the air outlet box. Electrostatic precipitators play a huge role in dust removal and are widely used in thermal power plants, cement plants, steel plants and other industries. [0003] The electrostatic precipitator can effectively remove the dust with medium specific resistance; but for the dust with high specific resistance, the dust removal effect is poor, and the back corona phenome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03C3/34
Inventor 韦巍陈颖悟郑春水
Owner ZHEJIANG UNIV
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