CALCULATION OF DUST/SO3 RATIO FOR LOW-LOW TEMPERATURE ELECTROSTATIC PRECIPITATOR AND ANALYSIS OF COALS IN CHINA

Low-low temperature electrostatic precipitator ( LLT-ESP) technology is a new technology and has become the mainstream method of smoke-gas treatment in Japan，as it can improve the collection efficiency of PM and SO3 ． D/S ratio ( Dust /SO3 ratio) which means the ratio of PM concentration ( mg /m3 ) to SO3 ( mg /m3 ) ，is one of the most important parameters in ESP selection and the measure of low temperature corrosion happens or not． It was analyzed the definition and formula of D/S ratio and calculated some representative coals in China． The relationship of D/S ratio to corrosion and the increase of efficiencies was given，which provided reference for study and application of LLT-ESP in China．