How To Curb Cement Kiln Dust

Cement Kiln Emission Standard Of Dusty Gas

Newish dry cement plant’s kiln head and kiln tail is the largest resource of dust pollution. The total gas volume in kiln head and kiln tail is about 60percent in the total gas volume of the whole plant. National environmental-friend bureau enacted a law called the cement industrial air pollutant emission standard on December 29, 2004. It unified the rotary and shaft kiln emissions standards, no longer according to the functional areas of the prescribed discharge standards. July 1, 2006 to 31 December 2009, the existing production line of cement kiln and kiln grinding machine of particulate emission concentration in the vent shall not exceed 100 mg/Nm “. Since January 1, 2010, the existing cement kiln and kiln grinding machine of particulate emission concentration in the vent shall not exceed 50 mg/Nm “, the unit product emissions must not exceed 0. 15 kg/t, that is, with the development of economy, the state environmental protection requirement enhances unceasingly.

Way To Curb Cement Kiln Dust

In the 1980s, China introduces from EE companies in the United States, Germany lurgi company the electrostatic dust collection technology. Through digestion, absorption and improvement, after 20 years of development, China has made outstanding contributions in terms of environmental protection. Developed a series of bag dust removal equipment, widely used and cement, electric power, chemical industry, metallurgy, steel industry emissions, such as large emission, food, medicine and other fields.

At present, the dust collector methods of cement kiln are basically electric dust collector and bag dust collectors, about 90% of plants use electric dust collectors and 10% use bag dust collectors. With the implementation of “emission standard of air pollutants of cement industry”, the proportion of bag dust collectors used in cement kiln dust collectors has increased. Due to the requirements of high concentration and high negative pressure, the high concentration and high negative pressure electric dust collector has been used, but the high concentration and high negative pressure bag dust collector has not been widely applied in this field. A large number of scientific research, manufacturing, and use of environmental protection equipment staff have done a lot of work on the cement kiln dust collector. The use of electric dust collector, bag dust collector has made great achievements. According to the regulation of the “emission standard of air pollutants for the cement industry”, the particulate emission concentration of cement kiln and the dense grinding machine shall not exceed 50mg/ Nm3. Previously, when the particulate emission concentration of the old standard cement kiln and kiln mill all-in-one machine should not exceed 100mg/Nm, in order to reduce investment, the particulate emission concentration of the electric dust collector is generally above 50mg/Nm, so that some non-electric dust collectors believe that the particulate emission concentration of the electric dust collector will be higher.