重整反应器扇形管承受催化剂的应力分析

STRESS ANALYSIS OF SCALLOP IN CATALYTIC REFORMING REACTOR

将粉体力学的方法引入到重整反应器主要内件扇形管承受催化剂的应力分析中,采用简化料仓模型得到的理论分析结果表明,反应器在正常工作条件下,扇形管所受的应力较小,而在催化剂再生系统开始工作(即催化剂开始在反应器内整体循环)和装置紧急停车瞬间,在扇形管的底端存在一个应力转换面,其应力值突增到正常工作下该部位应力值的十余倍。催化剂所产生的压力是造成扇形管失效的一个重要原因。在一个运行周期中,应尽量减少装置非计划停车次数。

Powder mechanics was introduced to analyze stress of scallop in catalytic reforming reactor. Theory analysis results using simplified storage bin model showed that the stress value of scallop is low at normal operation conditions. However, at the start-up of catalyst regeneration system and unit emergency shut- down, the stress value at bottom of scallop rises abruptly to about ten times that at normal operation conditions. The pressure from catalyst at above two mentioned conditions is one of major factors resulting in scallop failure. Therefore, unscheduled shutdown of the unit should be avoided in a operation cycle.