Electrostatic mist eliminators are used for ultra-low emissions in desulfurization – could simple water vapor cause an overload?
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Electrostatic mist eliminators are used for ultra-low emissions in desulfurization – could simple water vapor cause an overload? The inlet temperature of the desulfurization tower is above 200°C, and the gas enters the tower directly. The segmented spraying in the desulfurization tower generates supersaturated steam along with water mist. The temperature reaching the electrostatic demister installed in the tower structure is between 60–80°C. Unlike the purification section, which features equipment such as plate exchangers and intercoolers for heat exchange, as well as packed towers for washing, the large amount of supersaturated steam and water mist may cause clogging of the electrostatic demister.
An inlet temperature of 200 degrees is likely due to loop desulfurization; after wet washing, there is definitely a large amount of water vapor, which leads to an increase in gas volume. Given that the electrostatic fog used for desulfurization is generally configured in a single stage, adding a cooling section can reduce the load on the electrostatic fog.
With a large volume of flue gas from boiler desulfurization, there are no cooling and heat exchange devices
What can be removed are droplets, foam, and dust particles. Saturation water vapor at 60-80°C cannot be removed by electrodeslagging.