The dust removal principle of wet electrostatic precipitator (mist) is the same as that of conventional dry electrostatic precipitator, but the flue gas environment is different (dry type and wet type). DC high-voltage electricity ionizes the gas in the space near the cathode line. After the dust particles are charged, they move under the action of the electric field force and deposit on the surface of the dust collecting anode. The dust is removed with a water film or flushing on the surface of the dust collecting anode.
Mainly composed of shell, anode device, cathode device, insulation device, flushing system and high-voltage unit.
The shell is generally made of corrosion-resistant materials such as steel-lined glass flakes. It is divided into vertical structure and horizontal structure. The shell shape is divided into round and square. According to the actual situation, it can be installed at the top of the desulfurization tower or separately.
The air intake method can be set differently according to the actual situation.
The vertical structure has air intake at the lower part and air outlet at the upper part. It can also be used for air intake at the upper part and air outlet at the lower part.
Horizontal structure, flat in and out, etc.
The dust collecting anode plate should be made of corrosion-resistant materials. Each material has its own advantages and disadvantages, and should be selected according to actual conditions such as medium composition and temperature. Due to the large amount of gas to be processed for desulfurization flue gas, the anodes are generally plate type and honeycomb type, and the others are mostly circular tube type and honeycomb type.
The discharge cathode is available in a variety of materials and models. Corrosion-resistant materials are selected according to gas conditions, including the following stainless steels, lead-antimony alloys, and titanium alloys.
The main heating methods of the insulation device include electric heating and hot air heating. Prevent condensation and electricity creepage on the insulating quartz tube in the insulation box.
, flushing system with intermittent flushing or continuous flushing.
When operating in a corrosive gas environment, the shell and internal components must be made of anti-corrosion materials and treated with anti-corrosion.
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