Abstract: Abstract:The harm of the ash deposition in ash hopper of electrostatic precipitator in thermal power plant was introduced. Taking the Yunfu Power Plant as example, according to the operation data of the boiler No.5 and the height of the accessory equipment in the ash hopper of the electrostatic precipitator, the data of the ash hopper under different ash level were analyzed. The two distinguish bases depending on the gasification duct and the balance pipe respectively were studied, and a distinguish method of ash deposition in ash hopper of electrostatic precipitator was proposed.

Key words: Keywords:boiler, pneumatic ash removal system, ash hopper, ash deposition, gasification duct, balance pipe