Basic Structure and Composition Requirements of Commercial ESP

Commercial ESP mainly uses its high-voltage electric field to ionize the flue gas, and the charged dust in the airflow is separated from the airflow under the action of electric field. Negative electrodes are made of metal wires with different cross-section shapes, called discharge electrodes.

The positive electrodes of commercial electrostatic precipitators are made of metal plates with different geometrical shapes, which are called collecting electrodes. The performance of ESP is affected by three factors: dust property, equipment structure and flue gas velocity. The specific resistance of dust is an index for evaluating conductivity, which has a direct impact on dust removal efficiency. The specific resistance is too low to keep the dust particles on the dust collector, which results in the return flow of the dust particles. If the specific resistance is too high, the charges of dust particles reaching the dust collector are not easy to discharge, and the formation of voltage gradient between the dust layers will lead to local breakdown and discharge. These conditions will result in the decline of dust removal efficiency.

The power supply of commercial ESP is directly composed of control box, rectifier and boost transformer. The output voltage of the power supply also has a great influence on the dust removal efficiency. Therefore, the operating voltage of ESP should be maintained at 40-75kV or even above 100kV.

Basic Structure of Commercial Electrostatic Precipitator.

Commercial electrostatic precipitators are used in part as the main body system of the electrostatic precipitator. The other part is to provide high-voltage DC power supply and low-voltage automatic control system. The high-voltage power supply system supplies power to the boost transformer, and the dust collector pole of the dust collector is grounded. The low voltage electric control system is used to control the temperature of electromagnetic vibration hammer, ash discharge electrode, ash conveying electrode and several