The characteristics and working principle of electrostatic precipitator

Release time:04-27-2019

The basic principle of the electrostatic precipitator i […]

The basic principle of the electrostatic precipitator is to use electric power to capture the dust in the flue gas, which mainly includes the following four related physical processes: (1) ionization of the gas. (2) The charge of dust. (3) The charged dust moves toward the electrode. (4) Capture of charged dust.
Charged dust collection process: On two metal anodes and cathodes with large differences in radius of curvature, an electric field sufficient to ionize the gas is maintained by high-voltage direct current. The electrons generated after ionization of the gas: anions and cations, are adsorbed on The dust is charged by the electric field. Under the action of the electric field force, the dust with different electrode polarity moves to the electrodes of different polarities and deposits on the electrodes to achieve the purpose of dust and gas separation.

Compared with other dust removal equipments, electrostatic precipitators consume less energy and have high dust removal efficiency. They are suitable for removing dust of 0.01-50 μm in flue gas, and can be used in places with high flue gas temperature and high pressure. Practice has shown that the greater the amount of flue gas treated, the more economical the investment and operating costs of using an electrostatic precipitator.
Wide-pitch horizontal electrostatic precipitator technology
HHD wide-pitch horizontal electrostatic precipitator is a scientific research achievement that introduces and draws on foreign advanced technology, combines the characteristics of industrial kiln exhaust gas in various industries in China, and adapts to the increasingly strict emission requirements and WTO market standards. This achievement has been widely used in metallurgy, electric power, cement and other industries.
Optimum wide pitch and plate special configuration
The electric field strength and plate current distribution are more uniform, the driving speed can be increased by 1.3 times, and the specific resistance of the trapping dust is expanded to 10 1 -10 14 Ω-cm, which is especially suitable for a fluidized bed boiler and a new cement dry rotary kiln. High specific resistance dust recovery of exhaust gas such as sintering machine to slow down or eliminate back corona.
Overall new RS corona line
The maximum length is up to 15 meters, with low halo voltage, high corona current density, strong steel, never broken, high temperature resistance and heat resistance, combined with top vibrating method for excellent cleaning effect. Corresponding corona wire density is configured according to the dust concentration, so that it can be adapted to dust collection with high dust concentration, and the maximum allowable inlet concentration can reach 1000g/Nm 3 .
Corona pole top strong rapping
According to the theory of cleaning, the top of the electrode can be strongly rapping, and both mechanical and electromagnetic options can be used.