FCC装置烟机结垢的影响因素研究

STUDY ON FACTORS OF FLUE GAS TURBINE FOULING IN FCCU

在实验室模拟烟机内细粉烧结过程,探讨了几种石油中常见的金属元素、磷氧化物及SOx含量与催化剂颗粒粘连烧结的关系,研究了金属元素、磷氧化物及SOx对烟机结垢的影响,分析了模拟烧结产物的形貌变化以及烟机结垢的主要原因。结果表明:在SOx氛围下,随着催化剂颗粒中Ca,Fe,V,Ni,Na,K,La,Ce金属元素含量的增加,催化剂颗粒的粘连烧结程度增大;催化剂颗粒烧结颈处金属及硫元素含量比新剂中相应元素的含量高;磷氧化物的存在对催化剂颗粒烧结的影响不明显。

The metals on the catalyst particles,flue gas chemical composition and device operation conditions have a great relationship with the fouling of flue gas turbine.The influence of Ca,Fe,Na and other metals deposited on catalyst from feed and the content of SOxin flue gas is getting more and more attention.The simulation of the sintering process in the laboratory was conducted to test the influence of the quantity of metal elements,phosphorus oxides and SOxon adhesion and sintering of the catalyst particles,which is considered to be the reason for the flue gas turbine fouling.The results show that at SOxatmosphere,with the content of Ca,Fe,Na,and other metals in the catalyst particles increasing,the degree of adhesion and sintering increases,and more metals and sulfur exist in the sintering neck than in fresh catalyst.The influence of phosphorus oxides on the catalyst particle sintering is not obvious.