The working principle of electrostatic precipitator is to use high-voltage DC uneven electric field to ionize the gas molecules in the flue gas, generate a large number of electrons and ions, and move to the two poles under the action of the electric field force. It is charged, and the charged dust is separated from the airflow under the action of the electric field force and moves to the polar plate or polar line with the opposite polarity. The rapping device makes the dust fall into the ash hopper to purify the flue gas. basic structure:
The electrostatic precipitator is a device that uses the electricity generated by the electric field to separate the dust particles from the air flow. The commonly used horizontal plate type electrostatic precipitator is composed of the body and the power supply device. The body includes a dust collector shell, an ash hopper, a discharge electrode, a dust collecting electrode, an air distribution device, a vibrating ash cleaning device, an insulator and a heat preservation box, etc. The power supply device consists of three parts: step-up transformer, rectifier and control device.
It is suitable for particle control, and the efficiency of dust particles with a particle size of 1 to 2 μm can reach 98% to 99%;
In the electrostatic precipitator, the energy of the dust particles separated from the airflow is not supplied to the airflow, but directly supplied to the dust particles. Therefore, compared with other high-efficiency precipitators, the resistance of the electrostatic precipitator is low, only 100~ 200Pa; Can handle gas at high temperature (below 400℃); Suitable for large-scale projects, the greater the amount of gas processed, the more obvious its economic effect; The equipment is huge and covers a large area; It consumes a lot of steel and requires a large investment ; The structure is more complex, and the precision of manufacture and installation is high; There are certain requirements for the specific resistance of dust. Scope of application: It is used for flue gas dust removal and material recovery in industrial sectors such as thermal power generation, metallurgy, chemistry and cement.