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ghd stijltang kopen 轴流式&

 
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PostPosted: Mon 15:41, 21 Mar 2011    Post subject: ghd stijltang kopen 轴流式&

轴流式强制内循环表面更新设备
大量的凝液出现,此时生产进人脱挥。随着料温的缓慢上升、挥发分不断地被蒸发脱除。工艺控制料液的终温为180℃.在此温度下维持一段时间,当视镜中看不到凝液出现,则说明气液相已达平衡,[link widoczny dla zalogowanych],脱挥结束,可出料,[link widoczny dla zalogowanych]。该装置将轴流泵设计为单螺杆挤出机,当螺杆旋转时物料在循环管的摩擦力的作用下拖曳前移。物料在螺杆中的流动有正流、横流、倒流、湍流,[link widoczny dla zalogowanych]。只有当料液具有一定地粘度,摩擦力足够大时,才能使正流大于横流、倒流、湍流之和,单螺杆挤出机才能正常运行,形成循环喷淋。单螺杆挤出机在本装置能输送几万mPa.s至几百万mPa.s粘度的流体。换言之,该设备能满足在此粘度范围内的硅油、硅橡胶生产的要求。医药工程设计杂志Pharmaceutical&EngineeringDesign2003.24(4)该装置生产了五锅,生产运转情况良好,完全达到了设计要求及预定的目标。4设备特点图6为常用的强制外循环喷淋装置,与该装置对照可见轴流式强制内循环表面更新设备是将流体输送机械、换热器、真空槽集于一体。结构紧凑、维修方便。图6强制外循环喷淋装置脱挥设备按适用物料粘度分组情况如下表:第一组第二组第一组(<0.1Pa.Cool(0.1一lOOPs.Cool(0.1—5kPa.Cool单(或多)轴螺杆式降膜蒸发器薄膜蒸发器蒸发器闪蒸蒸发器外套式蒸发器离心薄膜蒸发器回转圆板式设备轧辊式蒸发器单(或多)轴翼片式流下液滴蒸发器排气式挤出机蒸发器流下液柱蒸发器搅拌式蒸发器问歇混合设备该设备适用处理物料的粘度可遍及上述各组。5结论轴流式强制内循环表面更新设备与众多的脱挥设备及缩聚反应设备相比,具有以下优点:提高了过程的效率,使装置更简单、可靠、投资更少、能耗更省、维修费更低;可解决生产中出现的难度大的工程问题。应用该技术在处理物料粘度为几mPa.s至几万mPa.s的物料时,技术难度更小,设备更简单。所以在高分子化合物聚合反应的小分子脱除和聚合物的提纯增浓过程中,轴流式强制内循环表面更新设备可替代降膜式蒸发器、闪蒸器,[link widoczny dla zalogowanych],离心薄膜蒸发器,流下液柱、液滴设备,多轴或单轴装有叶片的设备、单轴或多轴螺杆蒸发器,轧辊式蒸发器、挤出机等,[link widoczny dla zalogowanych]。
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