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Corona wire, also known as cathode wire or barbed wire, is an important component of electrostatic precipitators. The following is a detailed introduction about corona wires:
Definition and Characteristics
Definition: Corona wire refers to the phenomenon in which electrons in a gas are accelerated by an electric field under high voltage to obtain sufficient energy, and when they collide with gas molecules, they ionize. Standard corona wire usually refers to the corona phenomenon generated under specific conditions, such as voltage, current, electrode spacing, gas type, and other parameters.
Features: Efficient particle collection capability: Due to the high electric field strength of the corona wire, it can effectively ionize particles in the gas, including fine dust and smoke particles, with high collection efficiency.
Self cleaning performance: The corona discharge generates high-energy electrons and ions on the surface of the corona wire, which has strong cleaning ability. It can react with pollutants on the surface of the corona wire and oxidize and decompose, achieving self-cleaning.
Small space occupation and low noise: The corona wire is a slender filamentous structure that can be flexibly arranged inside the dust collector to reduce equipment volume, and the noise level is low during operation.
Composition and Type
Composition: The corona wire is usually bent from a thin steel plate and punched with spikes perpendicular to the corona wire on both sides of the steel plate.
Type: There are various types of corona wires, such as multi spike spike wire, spike wire, serrated spike wire, etc. Each type has its specific application scenarios and advantages.
Application and advantages
Application: Corona wires are widely used in various horizontal or vertical electrostatic precipitators, with good volt ampere characteristics and strong adaptability to changes in dust specific resistance. The cut-off voltage is more than 20000 volts higher than dust collectors using other corona wires.
Advantages: High mechanical strength: Corona wires have high mechanical strength, are not easily broken, and are suitable for various harsh environments.
Easy dust cleaning: Its self-cleaning performance allows the corona wire to work for a long time without frequent maintenance and cleaning.
Low cost: Corona wire processing is simple and cost-effective, suitable for use in new electrostatic precipitators or retrofitting old ones.
Matters needing attention
Insulation device: Corona wire poles are generally connected to high voltage electricity and require good insulation devices to ensure safety.
Appropriate spacing: The spacing between corona wires should be appropriate. If the spacing is too far, it will affect the corona current, while if the spacing is too close, it may cause screen distortion and weaken the surface electric field strength of the corona wires.
Summary
As a key component in electrostatic precipitators, the performance of corona wires directly affects the dust removal efficiency. By optimizing the structure, materials, and manufacturing process of corona wires, their collection efficiency can be further improved, energy consumption can be reduced, and their service life can be extended, making greater contributions to environmental protection.
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