Offline chamber blow three state controlled and to get the best air blow way ash removal effect. The use of new type low resistance offline valve with optimized design the overall filter to keep the entire precipitator long-term reliable running low resistance state.Negative pressure inside the filter type, easy disassembly, convenient maintenance. Differential pressure or timing ash removal mode of PLC automatic control, equipment operation support system reliability.Optional type big elevated direct discharge structure saving investment convenient operation.