Flue gas inlet direction of the sulfuric acid electrodemister

The acid mist emission limit for the efficiency of primary plastic electrostatic fog removal is ≤0.03 g/Nm3, while for secondary plastic electrostatic fog removal it is ≤0.005 g/Nm3. The water and impurities from the electrostatic fog removal process may be drawn into the drying tower by the sulfur dioxide fan

Sulfuric acid electrodemisters are commonly used for smoke purification in the sulfuric acid production process. This device reduces smoke emissions by using an electric field to capture and remove smoke particles. Regarding the direction of flue gas inlet, theoretically, the flue gas can enter the electrostatic precipitator from the top and then exit from the bottom, which is what is known as a top-to-bottom flow pattern. One advantage of this method is that, due to gravity, smoke particles can be more easily captured and removed. However, the specific mode of flow still depends on the specific design of the electrostatic demister and the application environment. For example, some electric mist eliminators may be designed so that the flue gas enters from the side and then exits from the top or bottom. Therefore, there is no flow pattern that suits all situations. Whether the exported mist meets the standards depends on the efficiency of the electrostatic mist remover, as well as the particle size and concentration of the original smoke. An efficient electrostatic demister should be able to **reduce the number of smoke particles, so that the smoke at the outlet meets environmental standards. However, if the particle size or concentration of the original smoke is too high, additional purification steps may be required to meet the standards. In general, both the flue gas inlet direction of the sulfuric acid electrodesmistifier and the quality of the exhaust smoke depend on various factors, including the design of the electrodesmistifier, the properties of the smoke, and the application environment. Therefore, it is best to consult the equipment manufacturer or relevant professionals for the most accurate information. .

Our company uses bottom-in, top-out for the secondary electrostatic demister.

This post was last edited by Suiyuan_WQQG on 2023-9-23 at 12:02. The electrostatic demisting system flushes or captures the detached impurities, which settle at the bottom; since the flue gas outlet is located at the bottom and under negative pressure, could these substances end up in the dryer?

It should be possible, but the air flow distribution needs to be taken into account; in other words, the air flow distribution is different between the second stage and the first stage, which increases costs, and manufacturers are reluctant to invest additional effort and money in this regard.