Fluidic Valves for Variable-Configuration Gas Treatment
Fluidic Valves for Variable-Configuration Gas Treatment
复制标题
用于可变配置气体处理的流体阀
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
V. Tesař
中科院分区：
文献类型：
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作者：
V. Tesař
本文调查了高度专业化的化学工程领域的最新发展：汽车尾气后处理，目前在该领域引入或考虑采用可变配置系统。它们通过在气体处理流路中插入不同的反应器来响应不同的操作条件。主要的实际问题是用于气流切换的阀门。通常的机械阀成本昂贵、容易出现故障、笨重（尤其是电磁阀变体），并且不够坚固，无法承受车身下方通常位置的高温、振动、冲击以及滴水和泥浆的不利条件。流体非移动部件阀廉价且坚固，被提议作为一种有吸引力的替代方案。特别是在其新颖的轴对称布局中，它们可能非常紧凑，实际上与反应器主体成一体。新方法带来的质变可能会给化学工程的其他领域带来启发。
The paper surveys recent development in the highly specialized field of chemical engineering: vehicle exhaust gas aftertreatment, where variable configuration systems are currently introduced or considered. These respond to varying operating conditions by inserting into the gas treatment flowpath different reactors. The main practical problem are the valves for gas flow switching. Usual mechanical valves are costly, failure prone, heavy (especially the solenoid variants), and not robust enough to withstand the adverse conditions of high temperature, vibration, shocks and dripping water and mud at the usual locations under vehicle body. Fluidic no-moving-part valves, inexpensive and robust, are proposed as an attractive alternative. Especially in their novel axisymmetric layout, they may be very compact, in fact integral with reactor body. The qualitative change brought by the new approaches may provide an inspiration to other areas of chemical engineering.