Electrostatic precipitator insulation box
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1. Cleaning the electrostatic precipitator with steam can cause tar and other impurities inside it to enter the insulation box, resulting in contamination of the insulating porcelain insulators. This is because the steam pressure is higher than the nitrogen pressure in the insulating box, and the separation between the insulating box and the body of the electrostatic precipitator consists merely of an iron plate. 2. Is it possible to open the bypass valve of the nitrogen pressure relief valve during steam purging of the electrostatic precipitator, in order to increase the nitrogen pressure inside the insulation box so that this pressure is higher than that of the steam? This would prevent impurities present in the electrostatic precipitator from being carried into the insulation box by the steam. 3. It is recommended that the manufacturer make modifications by installing a check valve, so that nitrogen can enter the body of the electrostatic precipitator, while steam containing impurities cannot enter the insulation box during cleaning of the electrostatic precipitator.
To prevent tar, naphthalene, and water vapor in the gas from condensing and depositing on the insulators, nitrogen at a pressure slightly higher than that of the gas is introduced into the bottom of the insulation box, thereby preventing the gas from coming into contact with the inner surface of the insulators； Secondly, a coiled tube steam heater or an electric heater is installed inside the insulated box to maintain the temperature of the space within the box between 90 and 110°C (i.e., 50°C above the dew point temperature of gas); an exhaust valve for adjusting the temperature is placed at the top of the insulated box, while vents that allow communication with the atmosphere are located at the bottom of the box. This prevents dew formation while also regulating the temperature of the insulation box ； Third, regularly wipe the surface of the insulators in the electrostatic tar catcher to remove dirt such as tar and naphthalene, thereby preventing a decline in insulation performance. This helps avoid surface discharge under high voltages that could lead to breakdown, as well as explosions and fires in the insulation box.