连续传导干燥机

比较连续传导干燥机

传导干燥的方式来处理热敏感材料，控制干燥过程中的气氛，以确保^终产品的质量，或使用的废热源干燥，以减少能源成本。上周的文章讨论分类的干燥方法，传导干燥机是如何工作的，看着一批传导机的类型。这篇文章比较连续导通机的类型。

一种连续传导干燥器可以干热敏感的溶液，淤浆，糊剂和颗粒剂含有颜料，石膏，粘土，精细化学品，粉煤和它的盐，可用于相对较短的滞留时间。干燥器输送以及干燥的材料;控制的传送速度控制的保留时间。连续传导干燥器不需要材料处理劳动，使得其操作成本通常远低于一个批处理单元。

某些功能有所不同机类型，包括如何有效地连续干燥机可以传达以及您的材料和相关设备需要养活干燥和接收的材料和处理烘干机的废气。单元通常工作在大气和轻微的负压力。燃料需求的范围从1.0至2.0磅的每磅水蒸汽蒸发，这取决于该材料所需的^终水分含量。一批单位，连续干燥机是在尺寸从实验室到规模化生产提供。能源成本也取决于材料和你的应用程序需要多少搅拌或疏散。

连续导通机的几种类型可供选择：蒸汽管回转，鼓机，螺旋输送机，振动盘和间接的多种光盘。

一种蒸汽管回转干燥机包括一个水平的，圆筒状的旋转紧固到容器壁上，通过蒸汽填充管加热的容器。热传输通过管子的材料，因为它流经容器。的干燥机通常用于干纤维和自由流动的粉末，特别是化学品和低密度粉末如食品。

甲滚筒式干燥器典型地具有一个或两个水平，加热夹套的旋转滚筒。该鼓筒旋转不仅有利于传热从血管壁的材料，但也朝向出口的材料移动。在滚筒式干燥器干燥片状或灰尘多的粉末，以及作为可流动的浆料或废渣的液体溶液或浆料。因为轴承的旋转机构必须经常上油，用双鼓单元，单位可以是昂贵的维护，鼓必须保持对齐，以确保流程的一致性。

甲螺旋输送机机通常包括一个或多个旋转螺钉水平，圆柱形热夹套容器内。加热介质是蒸汽或热水。每个螺钉也可以被加热。随着螺杆轴的旋转时，在血管壁和螺杆航班热传导的材料，并将其推通过干燥器。的干衣机可以干燥的非粘性，低水分含量的颗粒，晶体，纤维和自由流动的粉末，它可以恢复一些溶剂。该装置可以作为一个辅助的干燥器，以除去水分，从购买的材料，将在非常高的温度下进行热处理。这种预干燥是比除去水分的过程中的热处理过程中更有效率。尽管干燥器的连续模式下，它也可以在真空下进行操作。

振动托盘干燥器由一个矩形的加热夹套的容器中的一个或多个加热的金属托盘。该托盘的材料振动，并移动它朝向干燥器出口或下一个托盘。的干衣机可以处理的自由流动的粉末，以及颗粒剂，晶体和纤维，可以通过振动输送。干燥器是机械比一个螺旋输送器干燥器更稳定，因此它可以在较高的温度下的应用，如用作催化剂的陶瓷和粘土干燥。

一种间接的多个圆盘式干燥机，如Heyl＆Patterson的MultiDisc热的处理器，包括一个水平的槽状容器，含有两个或两个以上的旋转轴安装有光盘。大表面面积的碟片被加热。作为轴旋转，圆盘接触并同时轻轻拖动，而不是将其推至容器内，将热量传递给该材料。的干衣机可以处理泥浆，淤泥，糊剂，自由流动的粉末，颗粒剂，晶体和纤维。光盘还打破了肿块，使本机适用于处理土壤，挤出物和其他块状材料。轴的速度和光盘温度可以改变，而不影响材料的保留时间。干燥在低温下是有效的，因为在轴速度和盘的温度，可以改变从模块到模块。

Heyl＆Patterson设计和制造机，可提供多年的无故障运行，并提供实验室测试设施。因为我们自定义工程师每个MultiDisc的热处理器和保持原始图纸，我们可以根据原来的规格，烘干机服务。我们负责送货上门，安装和启动您的设备，您的工作人员，并提供初步的操作说明。

我们也制造商直接提供，以满足原始设备规格，以确保任何升级或维修将达到或超过原有设备的性能水平。 Heyl＆Patterson提供卓越的客户支持之前，期间和之后，我们提供的每一个产品的购买。

Comparing Continuous Conduction Dryers

Conduction drying is one way to handle heat-sensitive material, control a drying process atmosphere to ensure final product quality, or use a waste-heat source to cut energy drying costs.  Last week's post discussed classifying drying methods, how a conduction dryer works and looked at the types of batch conduction dryers.  This post compares the types of continuous conduction dryers.

A continuous conduction dryer can dry heat-sensitive solutions, slurries, pastes and granules containing pigments, gypsum, clays, fine chemicals, fine coal and salts, and can be used for relatively short retention times.  The dryer conveys as well as dries the material; controlling the conveying speed controls the retention time.  The continuous conduction dryer requires no material-handling labor, making its operating cost typically much lower than that of a batch unit.

Some features vary by dryer type, including how efficiently the continuous dryer can convey as well as dry your material and what related equipment is needed to feed and receive the material and handle the dryer's exhaust gas.  The unit typically operates at atmospheric and slightly negative pressures.  Fuel requirements range from 1.0 to 2.0 pounds of steam per pound of water evaporated, depending on the material's required final moisture content.  As with a batch unit, the continuous dryer is available in sizes from lab- to full-scale production.  Its energy costs also depend on the material and how much agitation or evacuation your application requires.

Several types of continuous conduction dryers are available:  steam-tube rotary, drum, screw conveyor, vibrating tray and indirect multiple disc.

A steam-tube rotary dryer consists of a horizontal, cylindrical rotating vessel heated by steam-filled tubes fastened to the vessel wall.  Heat transfers through the tubes to the material as it flows through the vessel.  The dryer is typically used to dry fibers and free-flowing powders, particularly chemicals and low-density powders such as foodstuffs.

A drum dryer typically has one or two horizontal, heat-jacketed rotating drums.  The drum rotation not only facilitates heat transfer from the vessel wall to the material but also moves the material toward the outlet.  The drum dryer can dry liquid solutions or slurries to flakes or dusty powders, as well as flowable pastes or sludges.  The unit can be expensive to maintain because the bearings for the rotating mechanism must be oiled frequently and, with a two-drum unit, the drums must be kept in alignment to ensure process consistency.

A screw conveyor dryer typically consists of one or more rotating screws inside a horizontal,  cylindrical heat-jacketed vessel.  The heating media is steam or hot water.  Each screw can also be heated.  As the screw shaft rotates, the vessel wall and screw flights conduct heat to the material and push it through the dryer.  The dryer can dry non-sticky, low-moisture-content granules, crystals, fibers and free-flowing powders, and it can recover some solvents.  The unit can be used as an auxiliary dryer to remove moisture from a material that will later be heat-treated at very high temperatures.  Such predrying is more efficient than removing moisture during the heat-treating process.  Despite the dryer's continuous mode, it can also be operated under vacuum.

A vibrating tray dryer consists of a rectangular heat-jacketed vessel containing one or more heated metal trays.  The tray vibrates the material and moves it toward either the dryer outlet or the next tray.  The dryer can handle free-flowing powders as well as granules, crystals and fibers that can be conveyed via vibration.  The dryer is mechanically more stable than a screw conveyor dryer, so it can dry at higher temperatures for applications such as ceramics and clays used as catalysts.

An indirect multiple disc dryer, such as Heyl & Patterson's MultiDisc Thermal Processor, consists of a horizontal trough-shaped vessel, containing two or more rotating shafts mounted with discs.  The large-surface-area discs are heated.  As the shafts rotate, the discs contact and transfer heat to the material while gently dragging rather than pushing it through the vessel.  The dryer can handle slurries, sludges, pastes, free-flowing powders, granules, crystals and fibers.  The discs also break up lumps, making the dryer suitable for handling soil, extrudates and other lumpy materials.  The shaft speed and disc temperature can be varied without affecting the material's retention time.  Drying is efficient at low temperatures because the shaft speed and disc temperature can vary from module to module.

Heyl & Patterson designs and builds dryers to provide years of trouble-free operation, and offers facilities for laboratory testing.  Because we custom engineer each MultiDisc Thermal Processor and maintain the original drawings, we can service your dryer according to its original specifications. We oversee delivery, installation and start-up of your equipment, and provide preliminary operating instructions to your personnel.

We also provide manufacturer-direct parts that meet original equipment specifications, ensuring that any upgrades or repairs will meet or exceed the original equipment's performance levels. Heyl & Patterson provides superior customer support before, during and after the purchase of every product we supply.