多乙二醇塔再沸器膨胀节应力强度评定

Stress Strength Judgment to the Expansion Joint of Polyglycol Column Reboiler

针对乙二醇装置中的多乙二醇塔再沸器膨胀节产生的裂纹失效,进行了三维有限元应力分析和应力强度评定,认为再沸器膨胀节产生裂纹失效的原因是强度安全余量不足。再沸器膨胀节的危险截面在波谷、波峰圆弧中点附近,危险点在波谷圆弧中点附近内、外表面和波峰圆弧中点附近内表面处。

The three-dimensional finite element analysis and the stress strength judgment are established separately to the appeared crack on the expansion joint of polyglycol column reboiler. The chief cause for the appeared crack on the expansion joint is convinced for the insufficient of strength reserve. The dangerous position are adjacent the centre of the outside and external circular arc surfaces of wave-valley or of external circular arc surfaces of wave-hump at the expansion joint.