The principle of electrostatic precipitators The classification of electrostatic precipitators

Electrostatic dust removal is a kind of gas dust removal method. The working principle of electrostatic precipitator is to use the principle of high-voltage electrostatic adsorption to remove particulate contaminants in the air. In a strong electric field, air molecules are ionized into positive ions and electrons, and the electrons encounter dust particles during the process of running toward the positive electrode. Negative electricity is absorbed to the cathode and collected. What are the classification of electrostatic precipitators ? Let's introduce it to everyone.

How electrostatic precipitators work

Air purifier electrostatic dust collection: The principle of high-voltage electrostatic adsorption is used to remove airborne particulate contaminants such as dust, coal smoke, pollen, cigarette odor, and kitchen fumes; it can also effectively absorb gaseous pollutants in the air and filter out The tiny pathogenic organisms in the air. The disadvantage of this technology is that it is easy to produce ozone, and it is only effective for large particle gases such as particulate matter. It is mainly used for dust removal and has little effect on the removal of organic substances such as formaldehyde and benzene.

Classification of electrostatic precipitators

Divided into vertical and horizontal flow direction, according to the precipitation pole type is divided into plate type and tube type, according to the precipitation method of dust on the precipitation plate is divided into dry wet type.

First, the advantages

(1) It has high purification efficiency and can spread fine dust above 0.01 micron. In the design, different operating parameters can be used to meet the required purification efficiency.

(2) The resistance loss is small, generally below 20 mm water column. Compared with the cyclone dust collector, even if the power supply unit and the rapping mechanism are considered to consume power, the total power consumption is still relatively small.

(3) The operating temperature is allowed to be high. For example, the SHWB circuit duster is best allowed to operate at a temperature of 250°C, and other types have an operating temperature of 350 to 400°C or higher.

(4) Large amount of processing gas range.

(5) Fully automatic operation control can be achieved.

Second, the shortcomings

(1) The equipment is more complex and requires equipment transportation, installation and maintenance.

(2) There is a certain requirement for the specific resistance of the dust, so there is a certain degree of selectivity for the dust and it is not possible to obtain high purification efficiency for all the dust.

(3) Affected by operating conditions such as gas temperature and temperature, the same kind of dust is operated under different temperatures and humidity, and the obtained results are different. Some dusts are used well under certain temperature and humidity, and in other A dust collector can hardly be used due to changes in dust resistance under temperature and humidity.

(4) Larger investment and horizontal electrostatic precipitator occupy a larger area.

(5) At present, the practical results in some enterprises do not meet the design requirements.

The above is an introduction to the working principle of electrostatic precipitators and the classification of electrostatic precipitators.