加氢裂化装置非标法兰优化设计

Optimization Design of Non-standard Flange in Hydrocracking Unit

介绍了按照Taylor-Waters法进行非标法兰的设计原则,分析了法兰环δf、锥颈高度h和法兰大端δ1对法兰轴向应力σH、径向应力σR和切向应力σT的影响关系,以某加氢裂化装置中温度和压力组合最为苛刻的非标法兰为例,在法兰总长度、螺栓规格和垫片不变的前提下,探讨了在初步法兰的应力计算和校核不满足设计要求的许用应力的基础上,对法兰δf、h和δ1这三个参数进行调整和优化,使σH、σR和σT分别小于相应的许用应力的85%,从而得到最优的结构尺寸,降低法兰重量,节省投资。

This paper introduces the principle of designing non-standard flange according to Taylor-Waters approach,and analyzes the influence of flange ringδf,taper neck height h and flange larger endδ1 on the axial stressσH,radial stressσR and tangential stressσT.Taking the non-standard flange working at the most severe temperature and pressure in a certain hydrocracking unit as an example,the paper touches upon how to adjust and optimize the three parametersδf,h andδ1 when the total flange length,bolt specification and gasket remain unchanged and preliminary stress calculation and checking of the flange does not meet the allowable stress demanded by design,so thatσH,σR andσT can be less than 85%of their corresponding allowable stresses,and as a result generating the optimal structural size,reducing flange weight and saving investment.