【作者】 谭建军； 杨秀娟； 刘铭刚； 闫涛； 闫相祯；

【Author】 Jianjun Tan;Xiujuan Yang;Minggang LIU;Tao Yan;Xiangzhen Yan;Oil and Gas CAE Technology Research Center, China University of Petroleum;College of Pipeline and Civil Engineering, China University of Petroleum;

【机构】 中国石油大学(华东)油气CAE技术研究中心； 中国石油大学(华东)储运与建筑工程学院；

【摘要】 在250万吨催化裂化(FCC)装置中,由于结构的大型化,装置中衬里破坏严重。本文首先进行了衬里材料的热传导实验,修正了催化裂化(FCC)装置中锚固钉对隔热耐磨衬里导热性能的影响,得到了衬里导热系数的修正系数。根据实验结果,基于线性热弹性理论建立了FCC装置中典型的衬里-金属结构的温度-应力耦合模型。该模型充分考虑了不同温度对衬里材料的导热性能、力学参数及抗拉压极限的影响,有效提高了计算结果的准确性。采用该模型在升温工况下对衬里结构的温度场、应力分布进行了分析和研究,并考虑衬里材料拉压不对称性,对衬里层进行了失效评定。结果表明:在整个升温过程中,衬里结构外侧温度变化明显慢于衬里内侧,在升温过程结束后4小时左右衬里结构外侧温度稳定在160.9o C,与现场装置温度吻合较好;衬里内侧部分主要以压应力为主,最大压应力为23.8MPa;衬里外侧部分主要以拉应力为主,最大拉应力为19.5MPa;在升温进行到37.6个小时后衬里外壁出现拉伸破坏,当升温结束后,衬里层外侧拉伸破坏厚度达40.7mm。更多还原

【Abstract】 In the 2.5 million tons FCC units, the damage and failure of the lining was serious. This paper first made a heat transfer experiment of the lining, corrected the effect of the anchoring nails to the thermal conductivity of the refractory lining in large-scale FCC units, the correction coefficient of the thermal conductivity coefficient of the lining is got. According to the experimental results established the temperature-stress coupling model of the typical lining-metal composite structure in large scale FCC units based on the theory of linear thermal elasticity theory. This model fully considered the effects of different temperature on the thermal properties, mechanical parameters, the compressive strength and the tensile strength of the lining material, improved the accuracy of the calculation results. Studied and analyzed the temperature field and stress distribution of the lining during the temperature rise process by using this model, conducted failure assessment for the lining considered the tension and compression asymmetry of the lining material. The results showed that: in the temperature rise process, the temperature changes in the outer part of the lining significantly slower than the inside part of the lining, after about 4 hours at the end of the temperature rise process, the temperature of the outer part of the lining stabilized at 160.9o C, the temperature field was in good agreement with the field devices; The inside part of the lining was under the compressive stress, the maximum compressive stress was 23.8MPa; The outer part of the lining was under the tensile stress, the maximum tensile stress was 19.5MPa; found the outer wall of the lining had tensile damage after 37.6 hours, temperature rising, the thickness of the lining which was tensile failure was 40.7mm after the temperature rise process.更多还原