S Zorb吸附脱硫装置运行过程中存在问题分析及应对措施

PROBLEMS IN S Zorb PROCESS AND COUNTERMEASURES

对中国石化上海高桥分公司S Zorb吸附脱硫装置运行至第二周期后陆续出现反应器过滤器压差高、原料换热器结垢等一系列影响装置长周期运行的问题进行分析。结果表明,造成反应器过滤器压差过高的原因是:①装置检修时,过滤器滤芯的永久滤饼层受到破坏;②反吹系统阀门故障,导致高压氢气对过滤器反吹时阀门打开不及时,影响了反吹效果。而原料换热器结垢的主要原因是从原料罐区来的汽油原料中的胶质前躯物和垢物较多。针对上述问题,采取修改反应过滤器压差高联锁值或者是提高反应压力和反吹氢气压力等措施可以解决过滤器压差高的问题;通过采用直接将催化裂化装置稳定汽油输送至S Zorb装置的方法可以解决换热器结垢问题,在一定程度上延长装置的运转周期。

In the second running period,larger differential pressure of reactor filter and fouling of the raw heat exchanger occurred in S Zorb unit in Gaoqiao Corporation.These problems brought great impact to the stable running of the S Zorb unit.The investigation discovered that the problems were occurred because of fouling of the filter and the heat exchanger.It is suggested that several methods can temporary be used to mild the problems,but the best way to reduce the pressure drop of the filter is to replace the filter cartridge and use new blow ball valves.While the fouling problem of the heater exchanger can be solved by thorough cleaning of bundle-tube of the heat exchanger and controlling the quality of FCC naphtha feed from tanks.These measures ensure a long period and stable running of the S Zorb unit.