What is the principle of the electrostatic precipitator?
A method of electrostatic dust removal and gas dust removal. The dust-containing gas is electrically separated when passing through a high-voltage electrostatic field, and after the negative combination of the dust particles and the negative ions, the surface of the anode is discharged and deposited. Used in the metallurgical, chemical and other industries to purify gases or recover useful dust particles. A dust collecting method for ionizing a gas by an electrostatic field to electrically adsorb dust particles to the electrode.
In a strong electric field, air molecules are ionized into positive ions and electrons, and electrons encounter dust particles in the process of the positive electrode, so that the dust particles are negatively charged and absorbed to the positive electrode to be collected. Of course, in recent years, through technological innovation, there is also a way of collecting dust using a negative electrode plate. In the past, it was often used in coal-fired factories and power stations to collect coal ash and dust from flue gas. Metallurgy is used to collect oxides of tin, zinc, lead, aluminum, etc., and now there are dust sterilization products that can be used in households.
The ordinary purifier uses filter paper to filter the dust in the air, which is easy to block the filter hole, and the dust accumulates more, which not only has no sterilization effect, but also easily causes secondary pollution. The electrostatic precipitator technology has the following advantages:
1. High purification efficiency, capable of spreading fine dust of 0.01 microns or more.
2. The resistance loss is small, generally 200-500Pa. Compared with the cyclone dust collector, even if the power consumption of the power supply unit and the rapping mechanism is considered, the total power consumption is still relatively small.
3. Allows high operating temperatures to handle highly corrosive gases. For example, cyclone type circuit breakers are preferably allowed to operate at temperatures of 250 ° C, and other types up to 350-400 ° C or higher.
4. The amount of processing gas is large.
5. The automatic operation control can be fully realized.