一、概况总厂化工一厂11.5万吨/年乙烯装置裂解炉是1972年从日本三菱公司引进的,炉墙的保温结构和材料都是基于六十年代末七十年代初的水平,炉壁温度日方设计为74℃。1976年投产后,炉壁温度最高147℃,平均90℃(环境温度11.25℃、风速3m/s)。经十多年时间的运行,炉墙结构松动,外壁温度视孔区最高达368℃,平均壁温已达140℃以上,局部炉墙板变形凸凹达35mm,炉子热效率 I. Overview General Plant Chemical Plant 115,000 tons / year ethylene plant cracking furnace was introduced from Japan’s Mitsubishi Corporation in 1972, the furnace wall insulation structure and materials are based on the late sixties and early seventies, the furnace wall Japan’s temperature is designed to 74 ℃. After put into operation in 1976, the furnace wall temperature of the highest 147 ℃, average 90 ℃ (ambient temperature 11.25 ℃, wind speed 3m / s). After more than 10 years of operation, the furnace wall structure is loosened. The temperature of the outer wall is as high as 368 ° C depending on the hole area. The average wall temperature has reached over 140 ° C. The deformation of local furnace wall panels reaches 35mm. The thermal efficiency