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闪蒸干燥机 基尔M / S奈良机械公司,日本,闪蒸干燥器在世界上的^制造商的技术合作,生产闪蒸干燥器。这种设计使用悬浮颗粒表面的材料中的水分迅速除去的固体颗粒分散在加热的气体/空气流的干燥技术。操作原理这个词闪蒸是指瞬时或快速干燥的产品。有五种主要因素支配的干燥速度。这些是:1。水分分布 这被定义为潮湿的表面的干燥介质(热空气或气体)中的可访问性。这是通过使用分散机如机械散射体,双桨馈线或笼式磨机等,通过混合在饲料中的干燥产物的产物在闪蒸干燥器实现。2。温度差 在闪蒸干燥,它是可能的,使用高的初始温度。这些都可能是由于接触时间短的结果,产品的温度从未超过气体的湿球温度,除非所有的表面水分除去。3。 AGITATION 在闪蒸干燥机,搅拌或湍流是通过使用高气体速度。蒸汽膜不断卷走从潮湿的颗粒。其结果是,除去水分几乎是瞬时的。4。颗粒结构 具有毛细管的材料将能够更迅速地得到的迅速干燥作用中的内部区域的表面自进化水分。有没有空隙的致密颗粒,是很难干燥,在一个闪蒸干燥系统。5。颗粒尺寸 通过蒸发从粒子的表面来完成干燥。因此,要除去的内部的水分,这是必要的水分通过扩散到达表面。这一转移将明显发生^迅速,更小的颗粒。典型布置 若干安排是可能的单独的应用程序,以适应规范。少数的安排都在这里显示。可以改变的需要和应用基础的基本组成部分。应用 闪蒸干燥可以考虑在几乎任何应用程序可以被转换成一个干粉滤饼,离心机蛋糕,污泥或潮湿的固体。 这种技术可以经济地使用几乎任何材料范围从热敏感的药品,如青霉素,磺胺类药物,可可蛋糕等食品原料,淀粉,纤维素,PVC,金属硬脂酸盐,矿物质,如碳酸钙陶瓷,粘土,和许多其他的化学物质,如材料。 此技术是^经济的,如果只以除去表面水分。FLASH DRYERS KILBURN manufactures Flash Dryers in technical Collaboration with M/S NARA MACHINERY COMPANY, JAPAN, the leading manufacturer of Flash Dryers in the world.This design uses suspended particle drying techniques where surface moisture of the material is rapidly removed by dispersing the particulate solids in a heated stream of gas / air.PRINCIPLE OF OPERATIONThe very word FLASH means instantaneous or rapid drying of products.There are five primary factors which govern the speed of drying. These are :1. MOISTURE DISPERSION This is defined as the accessibility of the moist surface to the drying medium (Hot air or gas). This is achieved in a flash dryer by use of a product disperser such as mechanical scatterer, double paddle feeder or cage mill etc. by mixing dried product in the feed.2. TEMPERATURE DIFFERENTIAL In flash drying it is possible to use high initial temperatures. These are possible due to short contact time with the result that the product temperature never exceeds the wet bulb temperature of the gas unless all surface moisture is removed.3. AGITATION In Flash Dryer, agitation or turbulence is accomplished by the use of high gas velocities. The vapour film is continuously swept away from moist particles. As a result, moisture removal is practically instantaneous.4. PARTICLE STRUCTURE Materials having capillaries will be able to evolve moisture to the surface from internal areas more rapidly resulting in swift drying action. Dense particles which have no voids are difficult to dry in a flash drying system.5. PARTICLE SIZE Drying is accomplished by evaporation from the surface of the particle. Therefore to remove the internal moisture, it is necessary that the moisture reaches the surface by diffusion. This transfer will obviously take place most rapidly with smaller particles.TYPICAL ARRANGEMENTS Several arrangements are possible for individual application to suit specification. A few arrangements are shown here. The basic components can be changed on need & application basis.APPLICATIONS Flash drying can be considered in almost any application where a Filter Cake, Centrifuge Cake, Sludge or Damp solids can be converted to a dry powder. This technique can be economically utilized on practically any material ranging from heat sensitive Pharmaceuticals like sulfa drugs, Penicillin, Food Materials like Cocoa Cake, Starch, Chemicals like Cellulose, PVC, Metallic Stearates, Minerals and Ceramics like Calcium Carbonates, Clay, and many other materials . This technique is most economical if only surface moisture is to be removed. 气流干燥机操作程序及异常情况排除 (一)、开车程序 所有传动设备经盘转灵活、正常,各岗位就绪,安全无误方可升温、启动开车。 (1)首先启动引风机,使蝶阀开启在所需的刻度,保证气体流量。 (2)启动空气压缩机,控制调节 热源 干燥离不开热源,但因被干燥物料比较复杂,对热源及换热设备都有不同的要求,一旦被干燥物料确定下来后,热源的选择就有了根据了。干燥器热源的种类及换热设备的形式在很大程度上决定设备的运转费用及生产成本,所以设备的技术经济指标不仅闪蒸干燥机具有热效率高,干燥时间短,节能效果好的优点。对膏糊状物料可直接干燥制成粉状干燥产品,节省了干燥前预处理,干燥后粉碎、筛分等工序;由于干燥速度快,物料受热时间短,不易破坏干燥物料的组分,特别有利于对热敏性物料的干燥; 闪蒸干燥机有机地结合了流化、旋流、喷动、粉碎、分级技术,是流化技术、? 污泥烘干机的烘干水分经历的过程有哪些?污泥烘干机将污泥中的水分烘干可以分为两个过程:一是蒸发过程,而是扩散过程。下面小编就为大家详细介绍这两个过程。 1、蒸发过程 蒸发的过程是污泥表面的水分与高温气体相接触,能量发生了转换,将污泥表面的水分汽化,这是污泥表面的水蒸气压低于气体中的水蒸气压。干燥时间短是闪蒸干燥机^有亮点的地方,短短几秒钟就能完成物料的整体干燥。下面就来看看闪蒸干燥机是如何实现短时间内干燥结束的。 热空气切线进入干燥器底部,在搅拌器带动下形成强有力的旋转风场。膏状湿物料由螺旋加料器进入干燥器内,在高速旋转搅拌桨的强烈作用下,物料受撞击、磨擦及剪切力的作用下得到分散 |
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