水力除焦三通阀流道结构的CFD分析.pdf

2012年第40卷第11期
流体机械
25
文章编号:1005-0329(2012)11-0025-06
水力除焦三通阀流道结构的CFD分析
王渭',陈凤官',明友,郝伟沙',成雷2,傅逸芳
1.合肥通用机械研究院,安徽合肥230031;2.中国石油化工股份有限公司安庆分公司,
安徽安庆246002:3.合肥通用特种材料设备有限公司,安徽合肥230031)
摘要:水力除焦三通阀是某炼油厂延迟焦化装置中的关键设备。依据合肥通用机械研究院设计的水力除焦三通阀
结构,建立其在旁路循环工况和水力除焦工况下的流域模型,采用 SIMPLE算法和 Standard k-s湍流模型,进行了三通
阀内部流场的CFD分析,并与原设计的简化计算进行了对比。模拟结果表明;旁路循环时该阀能有效地逐级消能,且满
足水泵的最低流量要求;除焦作业时三通阀上的压降仅占系统压降的0.6%,且阀芯密封面下部节流孔的设计有效地保
护了主密封面不被破坏。网门流场的数值模拟结果符合现场应用情况。
关键词:水力除焦三通阀;流道;多级消能;CFD
中图分类号:TB24
文献标识码:A
doi:10.3969/j.issn.1005-0329.2012.11.006
CFD Analysis of the Flow Channel Structure for Hydraulic Decoking Three-way Valve
WANG Wei, CHEN Feng-guan', MING You, HA0 Wei-sha, CHENG Lei, FU Yi-fang
(1. Hefei General Machinery Research Institute, Hefei 230031, China; 2. Sinopec Anqing Company
Anqing 246002, China 3. Hefei Tongyong Special Material Equipment Co, Ltd. Hefei 230031, China
Abstract Hydraulic decoking three-way valve is the key equipment for a refinery delayed coking unit. Based on the structure
of the Hydraulic decoking three-way valve, which designed by Hefei General Machinery Research Institute, the Internal flow
channel model of bypass circulation and hydraulic decoking conditions were built. By using the SIMPLE algorithm and Standard
k- urbulence moel, CFD analysis of inernal fow field of three-way valve and a comparison with the original calculation were
carried out. The simulation euls how ha: the alve in the byass circulation condition can dissipate energy step by step, and
meet the pumps minimum flow requirements; In full-flow hydraulic decoking condition, the pressure drop through three-way valve
only accounts for. 6 of system pressure drop, and the design of orifice under the sealing sur ace protects the main sealing sur
face not to be destroyed effectively. The numerical simulation results of the valve internal flow field comply to the field application
Key words: hydraulic decoking three-way valve; flow channel; multistage dissipation of energy; CD
前言
的2台并联闸阀,以满足开泵时水泵的最小连续
稳定运行流量?,除焦管道的小流量低压力预充
某炼油厂延迟焦化装置的除焦方式为水力除满,以及除焦作业时的高压全流量;此外,该阀还
焦!4。原来的高压水泵出口的除焦水用2台并要求耐冲刷,防堵塞6?。
联的电动闸阀控制,其管线复杂,在闸阀小开度节
近年来,计算流体动力学(CFD)技术的发展,
流时,闸板上压降高达16MPa,气蚀现象严重,且为人们了解阀门内部流场分布,探寻流动参数的
含有焦炭细颗粒的水高速冲刷阀门,导致闻阀使变化规律提供了良好的途径』。本文采用LU-
用寿命一般只有2~3个月。
ENT流体分析软件,对水力除焦三通阀回流状态
为提高除焦效率,该厂新增1台高压水泵,其和供水状态下的流域进行数值模拟,验证阀门流
扬程为200mnH2O,额定流量200m'/h;并委托合道的简化理论计算与数值模拟结果的一致性。阀
肥通用机械硏究院研制1台三通阀替代水泵出口『门流动的数值模拟结果符合现场应用情况。
收稿日期:2012-06-13