Abstract: The automatic temperature measurement and intelligent coking diagnosis system for furnace tube jointly developed by SINOPEC Maoming Company and Guangdong University of Petrochemical Technology was applied in the H-115 cracking furnace in Maoming, and the accurate measurement of the outer wall temperature of furnace tubes were achieved. Through the collection, diagnosis and analysis of strategy temperatures, the early detection and early warning of over temperature furnace tube can be achieved, and the manual temperature measurement can be replaced.

Key words: temperature of cracking furnace tube；automatic temperature measurement, over temperature warning, intelligent diagnosis