CAJ | 학술논문

采用计算流体力学软件 Fluent6．2对催化裂化装置沉降器内旋风分离器下部的料腿-翼阀排料区域周围的气相流场进行了数值模拟，主要分析翼阀阀板表面产生磨损的原因。计算结果表明，沉降器内油气在料腿负压差的作用下会通过开启阀板与阀口的间隙反窜进入料腿形成漏风，漏风量随着阀板开度和负压差的增大而增大。这种漏风携带催化剂颗粒冲击阀板是导致冲蚀磨损的主要原因，同时影响到旋风分离器的分离效率。
채용계산류체역학연건 Fluent6．2대최화열화장치침강기내선풍분리기하부적료퇴-익벌배료구역주위적기상류장진행료수치모의，주요분석익벌벌판표면산생마손적원인。계산결과표명，침강기내유기재료퇴부압차적작용하회통과개계벌판여벌구적간극반찬진입료퇴형성루풍，루풍량수착벌판개도화부압차적증대이증대。저충루풍휴대최화제과립충격벌판시도치충식마손적주요원인，동시영향도선풍분리기적분리효솔。
The numerical simulation of the gas flow field around the trickle valve of cyclone in FCCdisengager was conducted by CFD software Fluent6.2,and the erosion cause of trickle valve plate sur-face was analyzed. The calculation results indicate that the oil gas is entrained into the dipleg through the clearance between the valve plate and the valve port due to the negative pressure of the dipleg. The amount of oil gas increases with increasing the valve plate opening and the negative pressure. The oil gas carries catalyst particles to impact on the valve plate,which is the main reason of the erosion. The up-flow of oil gas through the dipleg also reduces the separation efficiency of the cyclone separator.