Wet electrostatic precipitator

Wet electrostatic precipitator is a new dust removal equipment used to treat trace dust and micro particles. It is mainly used to remove dust, acid mist, water droplets, aerosols, odors, PM2.5 and other substances in humid gases. It is an ideal equipment for treating atmospheric dust pollution.

Wet electrostatic precipitator, commonly referred to as WESP, has the same basic principle of dust removal as dry electrostatic precipitator, which involves three stages: charging, collection, and dust cleaning.

The wet electrostatic precipitator uses water to wash the surface of the dust collection electrode for dust cleaning, which can collect fine particles, heavy metals, and useful pollutants. After using the wet electrostatic precipitator, the dust emission in the wet flue gas can reach 10mg/m3 or even less than 5mg/m3, making it an ideal dust removal device for treating some high moisture and dusty exhaust gases. Wet electrostatic precipitators have advantages such as high power, large capacity, low energy consumption, and long service life.

The dust collection principle of wet electrostatic precipitator and dry electrostatic precipitator is the same, both rely on high-voltage corona discharge to charge the dust, and the charged dust reaches the dust collection plate/pipe under the action of electric field force. Dry electrostatic precipitators mainly deal with dry gases with low water content, while wet electrostatic precipitators mainly deal with wet gases with high or even saturated water content. There are significant differences between WESP and DESP in the removal methods of dust captured on the dust collection plate/pipe. Dry electrostatic precipitators generally use mechanical vibration or acoustic cleaning to remove dust accumulation on the electrodes, while wet electrostatic precipitators use regular flushing to remove dust with the flow of flushing solution.

Technical characteristics of wet electrostatic precipitator:

(1) The metal plate structure is simple, has strong mechanical properties, is not prone to deformation, and its assembly method is relatively simple, with outstanding value in electric field stability. Under high operating voltage, its dust removal effect will also perform ideally.

(2) The application of water film flushing for dust removal has a relatively ideal distribution effect, outstanding dust removal value, and ideal work efficiency and stability. During the process of spraying water to clean dust, heavy metal pollutants such as SO3, SO2, NH3, etc. can be removed, and the occurrence of problems such as "big white smoke" and "gypsum rain phenomenon" can be controlled. At the same time, the metal plate wet electrostatic precipitator can collect acid and dilute it to achieve alkali balance, reducing the impact on the operation of other equipment.

(3) The metal plate wet electrostatic precipitator has ideal high-temperature resistance and is characterized by non corrosiveness. Once the desulfurization system malfunctions, it can operate normally at higher flue gas temperatures. The equipment is equipped with a sprinkler water circulation system, which can maintain cleanliness for a long time and lay a good foundation for the stable operation of various equipment.