Exhaust gas pollutant treatment device by withdrawal cement kiln circulating material and treatment method thereof

(22) 24.10.2022

(43) 22.03.2023

(57) Processing pollutants from flue gas with some of the circulated materials that adversely affect the firing process among the high-temperature combustion gas and raw material decomposition gas due to the expansion and use of circulated raw materials such as combustible recycled fuel and sludge such as waste synthetic resin in the cement kiln as alternative resources. An apparatus and method for is disclosed. The present invention is an exhaust gas withdrawal device for withdrawing exhaust gas containing circulating materials from a cement manufacturing facility in which cement raw materials are fed into a cement kiln through a preheating room and fired, and the exhaust gas withdrawal device is installed at the inlet side of a cement kiln. An extractor for cooling and withdrawing exhaust gas; a bag filter for collecting dust in the exhaust gas withdrawn from the extractor; and an exhaust gas recirculation conduit connected to a tertiary duct for circulating tertiary air from the outlet of the kiln to the inlet of the kiln, and supplying at least a portion of the exhaust gas passing through the bag filter frame to the tertiary duct. It provides an exhaust gas withdrawal device characterized in that for doing.

(71) Ssangyong C&E Co Ltd (KR)