Pipe type air preheater for afterheat utilization of high-temperature dezincing waste gas of metallurgic rotary hearth furnace and working method thereof

• Main Authors: ZENG HUI, LI JIANYUN, WEI XINMIN, XUE QINGGUO, LI LAISUO, SUN LIYU, DUAN LUANFANG, YANG JUN, LIU XING, SUN GUOHONG
• Format: Patent
• Language: Chinese; English
• Published: 10.03.2010
• Subjects: BLASTING; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; OVENS; RETORTS; WEAPONS

The invention relates to a pipe type air preheater for the afterheat utilization of high-temperature dezincing waste gas of a metallurgic rotary hearth furnace and a working method thereof, belongingto the technical field of energy-saving equipment. The pipe type air preheater comprises a secondary air preheater, a combustion-supporting air preheater, ash cleaning devices and an ash conveying device, wherein the secondary air preheater and the combustion-supporting air preheater are arranged in one shell which is provided with a waste gas inlet interface and a waste gas outlet interface, thesecondary air preheater is positioned at a side where the waste gas inlet interface is arranged, and the combustion-supporting air preheater is positioned at a side where the waste gas outlet interface is arranged; the secondary air preheater and the combustion-supporting air preheater both comprise heat exchanging pipes, the tops of the secondary air preheater and the combustion-supporting air preheater are provided with