1、 Working principle of electrostatic dust removal technology:
When the gas containing dust particles passes through the high-voltage electric field formed between the cathode line (also known as corona electrode) connected with the high-voltage DC power supply and the grounded anode plate, due to the corona discharge of the cathode and the ionization of the gas, at this time, the negatively charged gas ions move towards the anode plate under the action of the electric field force, and collide with the dust particles in the movement, so that the dust particles are negatively charged, The charged dust particles move to the anode under the action of electric field force. When they reach the anode, they release the electrons. The dust particles are deposited on the anode plate, and the purified gas is discharged out of the dustproof device.
2、 Classification of electrostatic precipitator:
It is divided into vertical and horizontal according to the air flow direction, plate and tube according to the type of precipitation electrode, and dry and wet according to the dust removal method on the precipitation electrode.
3、 Advantages of electrostatic precipitator:
1) Efficient dust removal effect: the dust removal efficiency of electrostatic purification equipment can reach 95%.
2) Low operation cost: the resistance of industrial electrostatic dust removal equipment is small. The resistance of the fan is reduced and the operation cost is reduced; The equipment itself adopts advanced high-voltage control system and high-voltage power supply, with high conversion efficiency and low power consumption.
3) Convenient maintenance: the components that need to be cleaned regularly are removable modular combination, which is not only convenient for the daily cleaning and maintenance of the equipment, but also conducive to the repair and replacement of these components.
4) Small floor area: the power supply of the equipment and the equipment are together, and there is no need to build another power control room to save the plant area.
5) Continuity of operation: group power supply is adopted; Even if one group of electric field discharges or fails, other groups can work normally without affecting the operation of the equipment and ensuring the continuity of equipment operation.
6) Safety: the equipment is equipped with fire net, fire damper, temperature detection system and fire extinguishing system to ensure the safe and stable operation of the equipment.
7) It has high purification efficiency and can spread fine dust of more than 0.01 micron. In the design, different operating parameters can be used to meet the required purification efficiency.
8) The resistance loss is small, generally below 20mm water column. Compared with the cyclone, even considering the power consumption of power supply unit and rapping mechanism, the total power consumption is still small.
9) The allowable operating temperature is high. For example, the allowable operating temperature of circuit dust collector is preferably 250 ℃, and other types reach 350 ~ 400 ℃ or higher.
10) The gas processing range is large, and the automatic operation control can be fully realized.
4、 Scope of application
Coal fired power plants, iron and steel plants, small boilers, waste incineration, cement, building materials, chemical and other flue gas deep purification devices can effectively control PM2.5 particles, acid mist, gypsum rain, ammonia sol, etc.