FCC沉降器旋风分离器翼阀磨损实验分析  

Experimental analysis of erosion on trickle valve of cyclone in FCC Units

作　　者：刘人锋[1] 刘晓欣[2] 王仲霞[2] 闫雪[1] 严超宇[1] 魏耀东[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京市102249 [2]中国石油化工股份有限公司石家庄炼化分公司,河北省石家庄市050032

出　　处：《炼油技术与工程》2013年第12期23-26,共4页Petroleum Refinery Engineering

基　　金：国家自然科学基金(20876170)项目资助;中国石油大学(北京)基本科研基金资助(KYJJ2012-03-13);中国石油化工股份有限公司石家庄炼化分公司技术开发项目资助(30750000-12-ZC0607-0003)

摘　　要：针对FCC沉降器旋风分离器料腿下端翼阀阀板磨损的问题,在150 mm×5 000 mm料腿翼阀实验装置上进行了排料实验。实验表明,翼阀磨损与漏风有关,是气体夹带催化剂颗粒冲击阀板造成的冲蚀磨损,磨损部位主要发生在阀板与阀口接触的椭圆密封面上。根据颗粒质量流率和内外负压差参数,翼阀主要有连续式滴流状和周期性节涌状两种排料形式。连续式滴流状排料时,阀口附近的压力脉动呈高频低幅值波动,翼阀下部开口比较大,冲蚀磨损最严重的部位发生在阀板的底部,形成椭圆状沟槽式磨损;周期性节涌状排料时,压力脉动呈低频高幅锯齿状波动,下部的排料为密相半管流形态,冲蚀磨损主要发生在阀板上部边侧,形成沟槽式磨损。An discharge experiment was conducted on a φ150 mm × 5 000 mm dipleg to study the erosion on trickle valve of cyclone in the FCC unit. The results of experiments show that the erosion of trickle valve is related to the leakage of air, and the erosion is contributed to the impingement of catalysts particles entrained with gas on the valve plate. The erosion area is mainly on the elliptical sealed face between the valve plate and valve port. There are two kinds of discharges, i.e. continuous discharge and periodic discharge based on the solid flux and negative pressure difference. During continuous discharge, the measured pressure near the valve port is high in frequency and low in amplitude. As the opening of lower part of trickle valve is larger, the most serious impingement erosion occurs on the bottom of valve plate, resulting in elliptical deep erosion groove. During periodic discharge, the measured pressure is low in frequency and high in amplitude. The discharge is the dense-phase half-pipe flow in the bottom of dipleg. The deeper erosion grooves are mainly found at the up- sides of valve plate.

关 键 词：FCC沉降器 旋风分离器 翼阀磨损 漏风 排料形式 

分 类 号：TE967[石油与天然气工程—石油机械设备]