Electrostatic precipitator having a spark current limiting resistors and method for limiting sparking
AssigneeBabcock & Wilcox Power Generation Group, Inc.
InventorsYounsi Abdelkrim, Zhou Yingneng, David Johnston, Robert W. Taylor
Life of this patent
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Abstract
An electrostatic precipitator including: a collecting electrode in a gas passage; a discharge electrode in the gas passage and separated by a gap from the collecting electrode; a power supply applying a voltage to the discharge electrode, wherein the voltage establishes an electric field between the discharge electrode and the collecting electrode to ionize gas flow in the gap, and a resistor in series with the discharge electrode and having an effective resistance in series with the discharge electrode of at least 50 Ohms.
Claims5
A method mitigating sparking in an electrostatic precipitator having a discharge electrode, a collecting electrode, and at least one resistor in series with the discharge electrode the method comprising:
- applying a current to the discharge electrode to form a voltage potential between the discharge electrode and collecting electrode;
- flowing a gas through the precipitator and through a gap between the discharge electrode and the collecting electrode, wherein the gas is ionized b the voltage potential;
- collecting charged particulates in the gas on the collecting electrode to remove the particulates from the gas;
- when a spark forms between the discharge electrode and the collecting electrode, reducing current flowing through the electrode by dissipating current in the at least one resistor;
- wherein the discharge electrode is a plurality of discharge electrodes arranged in sets and the method further comprises selecting a first resistor in series with a first set of discharge electrodes to have a higher resistance than a second resistor in series with the second set of discharge electrodes.
Dependencies are inferred from the claim text.