石油化工腐蚀与防护
石油化工腐蝕與防護
석유화공부식여방호
PETROCHEMICAL CORROSION AND PROTECTION
2011年
5期
9-13
,共5页
焦炭塔%裙座%裂纹%缺陷%分析%修复
焦炭塔%裙座%裂紋%缺陷%分析%脩複
초탄탑%군좌%렬문%결함%분석%수복
coke tower%skirt%cracking%defect%analysis%repair
焦炭塔长期运行在高温及充焦、除焦的冷热疲劳操作条件下，出现了塔体与裙座焊缝裂纹或穿透，尤以T101C塔的裂纹最为严重，其穿透的裂纹内侧长度达30mm，外表面裂纹长度已近3m。其余三塔外表面裂纹长度也有1～2m，均集中表现在除焦阀下方焊缝位置。文章通过对焦炭塔的使用状况及应力分析，指出了裙座焊缝裂纹产生的原因。同时对焦炭塔返修和操作中应注意的问题进行了总结。
焦炭塔長期運行在高溫及充焦、除焦的冷熱疲勞操作條件下，齣現瞭塔體與裙座銲縫裂紋或穿透，尤以T101C塔的裂紋最為嚴重，其穿透的裂紋內側長度達30mm，外錶麵裂紋長度已近3m。其餘三塔外錶麵裂紋長度也有1～2m，均集中錶現在除焦閥下方銲縫位置。文章通過對焦炭塔的使用狀況及應力分析，指齣瞭裙座銲縫裂紋產生的原因。同時對焦炭塔返脩和操作中應註意的問題進行瞭總結。
초탄탑장기운행재고온급충초、제초적랭열피로조작조건하，출현료탑체여군좌한봉렬문혹천투，우이T101C탑적렬문최위엄중，기천투적렬문내측장도체30mm，외표면렬문장도이근3m。기여삼탑외표면렬문장도야유1～2m，균집중표현재제초벌하방한봉위치。문장통과대초탄탑적사용상황급응력분석，지출료군좌한봉렬문산생적원인。동시대초탄탑반수화조작중응주의적문제진행료총결。
As the coke tower has been operating under high temperature and cyclic cold/hot operation conditions during tower filling and decoking for a long time, the cracking and fracture failure occurred on the welds between tower body and skirt, especially in tower T101 C, whose cracking on the internal surface is 30 mm long and the cracking on external surface is nearly 3 meters in length. The erackings on the external surfaces of other 3 towers are 1 - 2 meters long, which are concentrated on the welds bellow the decoking valve. The operation and stress of coke towers are analyzed and causes of cracking on skirt welds are concluded. The precautions in repair and operation of the towers are proposed.
