Wet electrostatic precipitator The filter is a new dust removal equipment used to deal with micro dust and micro particles. It is mainly used to remove dust, acid mist, water droplets, aerosols, odor, PM2.5 and other harmful substances in humid gases. It is an ideal equipment for controlling atmospheric dust pollution.
Wet electrostatic precipitator Generally referred to as WESP, and dry type Electrostatic precipitator The basic principle of dust removal is the same, which goes through three stages: charging, collection and dust removal.
The wet electrostatic precipitator mainly has two structural forms. One is to use corrosion-resistant conductive materials (which can be non-metallic materials with excellent conductivity or metal materials with corrosion-resistant characteristics) as the dust collector, and the other is to use non-conductive non-metallic materials as the dust collector by forming a conductive water film through water spray or overflow.
Wet electrostatic precipitators can also be divided into cross flow (horizontal) and vertical flow (vertical) according to the flow direction of waste gas. The cross flow type is mostly plate structure, and the gas flow direction is horizontal, similar to the dry electrostatic precipitator; The vertical flow type is mostly tubular structure, and the gas flow direction is vertical. Generally speaking, the efficiency of vertical flow wet electrostatic precipitator is twice as high as that of cross flow wet electrostatic precipitator under the condition of the same ventilation cross-sectional area.
The dust deposited on the electrode plate can be washed down by water. Wet dust removal can avoid the re flying of captured dust and achieve high dust removal efficiency. Since there is no rapping device, the operation is also more reliable. The device that forms conductive film on the surface of the dust collector by means of water spray or overflow water has problems of corrosion, sludge and sewage treatment. It is only used when the dust concentration of the gas is low and the dust removal efficiency is required to be high; The wet electrostatic precipitator using corrosion-resistant conductive materials as the dust collector does not need long-term water spray or overflow water. It is only washed regularly according to the system operating conditions, and only consumes a small amount of water. This part of water can be recycled, and the dust collection system is basically free of secondary pollution.
