Electric precipitator electrode for removing metal, graphite or carbon black dust

Abstract

The invention relates to an electric precipitator electrode for removing metal, graphite or carbon black dust. The electric precipitator electrode comprises a dust collecting electrode made from a conductive material; the dust collecting electrode is electrically connected with a power connection conductor or a grounding conductor; the whole surface of the dust collecting electrode is a conductive ceramic material layer; the surface, which can absorb the dust in gas to be dedusted, of the power connection conductor or the grounding conductor is an insulating material layer or a conductive ceramic material layer. The invention aims at providing the electric precipitator electrode for removing metal, graphite or carbon black dust, and is high in efficiency of removing the metal, graphite or carbon black dust having very fine particles, high in gas flow treatment capacity, wear-resistant and long in service life.

Description

technical field [0001] The invention relates to an electrode of an electric precipitator for removing metal or graphite or carbon black dust. Background technique [0002] Those skilled in the art believe that due to the low specific resistance of metal dust or graphite dust or carbon black dust, when the dust reaches the dust-collecting electrode of the electrostatic precipitator, the speed of releasing charge is too fast and the discharge time is too short, resulting in collection The dust electrode has not yet had time to electrically absorb dust particles, and the dust particles have become uncharged neutral dust particles, thus making it difficult for metal dust, graphite dust or carbon black dust to be captured by the dust collecting electrode, and re-enter the airflow Most of the metal dust, graphite dust or carbon black dust pass through the electrostatic precipitator with the airflow, so that the electrostatic precipitator cannot efficiently remove dust from the gas...

AI Technical Summary

Problems solved by technology

However, our analysis and experiments have shown that only coating the dust-collecting electrode with a conductive paint is not ideal for reducing the release rate of the metal dust or graphite dust or carbon black dust, because even if the resistance of the dust-collecting electrode is increased to a suitable electric current The specific resistance range of the dust collector’s work, the resistance of metal dust or graphite dust or carbon black dust itself is still very low, and the metal dust or graphite dust or carbon black dust with high voltage charge is increased when it comes into contact with the collection of resistance At the moment of the dust electrode, due to the large volume of the dust collecting electrode and the grounding all the time, the resistance of the dust itself is still very low, so that the metal dust, graphite dust or carbon black dust will still complete the discharge in a short time , the discharge hysteresis effect brought by it has a limited impact on improving the dust removal efficiency. Experiments show that its dust removal efficiency for graphite dust with a particle size of more than 20 microns does not exceed 95%, and for graphite dust with a particle size of 10-15 microns The dust removal efficiency is about 90%, and the dust removal efficiency for graphite dust with a particle size below 2.5 microns is less than 50%. That is to say, the dust removal efficiency it can achieve cannot meet the environmental protection requirements of most production processes.

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