进口扩散器(Inlet Distributor /Feed Diffuser )

来自反应器入口的介质首先经过入口扩散器,在上部锥形体整流后,经上下两挡板的两层孔的节流、碰撞后被扩散到整个反应器截面上。其主要作用为:一是将进入的介质扩散到反应器的整个截面上;二是消除气、液介质对顶分配盘的垂直冲击,为分配盘的稳定工作创造条件;三是通过扰动,促使气液两相混合 In downflow pattern, inlet nozzle is also used as manway for internals introduction and catalyst loading。 In this case, the connecting pipe is a smaller diameter featuring a 90° elbow and allowing its easy dismantling。 Therefore, the incoming pipe is welded to a custom made reduction flange。 The feed diffuser can be either attached to this flange or sitting in a groove between the flanges。 Depending upon flow dynamics of reactor top head and process operation, the feed diffuser is designed from a mix of plate, screen, and perforated plate。 Usually, an impingement plate faces the incoming flow which may be diverted through several channels。 Its size depends upon the incoming pipe diameter and the nozzle height。 In upflow patterns, the feed diffuser is laying above the inlet nozzle。 It may be necessary to have a removable equipment that will allow easy cleaning of the parts

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