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真空烘干机厂家教你怎么提高烘干机产量!

2019-03-12 来源:http://www.zhongyanjixie.com 发布人:admin 浏览量:
  随着烘干机行业高速发展,很多厂家都在致力于研究怎样提高烘干机的产量。通常来讲,影响烘干机产量的因素是很复杂的,既有设备操作问题,又有生产管理,维修保养问题。其中,对烘干机产量影响大的是热源的选择、湿物料种类和热风的温度。今天,技术人员就来为大家详细的分析一下。
  With the rapid development of dryer industry, many manufacturers are committed to studying how to improve the output of dryer. Generally speaking, the factors affecting the output of dryer are very complex, including equipment operation, production management and maintenance. Among them, the selection of heat source, types of wet materials and temperature of hot air have the greatest impact on the output of dryer. Today, technicians will come to you for a detailed analysis.
  首先,是热源的选择。烘干机经常使用的燃煤热风炉有间接加热和直接加热两种。其中,间接加热的热空气清洁干净,但热效率不高,适合干燥时不能混入烟尘的物料。而直接加热会受烟尘的污染而影响产品质量,但热能利用很充分,热效率很高,对烘干时物料中混入少量烟尘而无影响时,可优先采用。目前,也有很多烘干机厂家使用油燃烧器,这种热风炉具有操作简便、升温迅速、温度稳定、控制方便的优点,而且使用成本也较低。
  First, the choice of heat source. The coal-fired hot blast stove often used in dryer has two kinds: indirect heating and direct heating. Among them, the indirectly heated hot air is clean, but the thermal efficiency is not high. It is suitable for materials that can not be mixed with smoke and dust when drying. The direct heating will be polluted by smoke and dust and affect the product quality, but the thermal energy is fully utilized and the thermal efficiency is very high. When a small amount of smoke and dust is mixed into the material during drying without affecting, it can be preferred. At present, many dryer manufacturers use oil burner, which has the advantages of simple operation, rapid heating, stable temperature, convenient control, and low cost.
  其次,是湿物料的种类。需要用烘干机干燥的湿物料种类有很多种,通常我们会按照物料与水分的结合形式来进行分类。用这种分类方法物料大致可分为三种,分别是:1.毛细管多孔物料。这类物料的水分主要靠毛细管的作用而结合在物料中,如砂子、二氧化硅、活性炭、素烧陶瓷等,水分与物料的结合强度较小,用烘干机烘干较容易;2.胶体物料。这类物料的水分与物料结合形式是以渗透结合形式占主导地位,如胶、面粉团等,这种物料一般表现粘度大,水分与物料的结合强度较大,用烘干机烘干较困难;3.毛细管多孔胶体物料。这类物料具有以上两类物料的性质,如泥煤、粘土、木材、织物、谷物、皮革等都属于此类物料。这类物料种类多,但此类物料之间的水分结合形式也有差别,决定了在同等条件下使用烘干机干燥的难易度也不相同。物料的形态对干燥也有很大的影响,如颗粒物料,颗粒大比颗粒小难烘干,而大块料,厚度小比厚度大容易烘干。
真空烘干机厂家
  Secondly, the types of wet materials. There are many kinds of wet materials that need to be dried by a dryer. Usually, we classify them according to the combination of material and moisture. Materials can be roughly divided into three categories by this classification method: 1. Capillary porous materials. The moisture of this kind of material mainly depends on the capillary function and is combined in the material, such as sand, silica, activated carbon, vegetable-fired ceramics, etc. The binding strength of moisture and material is small, and it is easier to dry with a dryer; 2. Colloidal material. The combination of water and material is dominated by osmosis, such as glue, flour dough, etc. This kind of material generally shows high viscosity, and the combination strength of water and material is strong, so it is difficult to dry with dryer. 3. Capillary Porous Colloidal material. These materials have the properties of the above two kinds of materials, such as peat, clay, wood, fabric, grain, leather and so on. This kind of material has the most types, but there are also differences in the form of water combination between these materials, which determines the difficulty of drying under the same conditions by using dryer. Material shape also has a great influence on drying, such as particulate material, which is difficult to dry when the particle size is larger than the particle size, while the bulk material is easy to dry when the thickness is smaller than the thickness.
  后,是热风温度。热风温度,也可称为烘干介质温度,是烘干机在烘干时敏感的一个条件。热风温度越高,则所含热能越多,同时热风的相对湿度也越低,吸收水分、携带水分的能力也越强,非常有利于烘干,而且烘干热效率也很高。在许多烘干机设备中,当其它条件不变,烘干机的脱水能力基本与热风温度的变化成正比。我们在选择烘干设备时,一定要对破坏物料的极限温度有充分的数据,在物料允许的情况下,尽量选择高温介质。特别应注意的是,许多种烘干方法,特别是快速烘干,烘干后的物料温度都是大大低于烘干介质的温度。例如气流烘干机热风温度虽然高达250℃以上,而出料温度一般均在60℃以下。
  Finally, the hot air temperature. Hot air temperature, also known as drying medium temperature, is the most sensitive condition of dryer in drying. The higher the temperature of hot air, the more heat energy it contains, and the lower the relative humidity of hot air, the stronger the ability to absorb and carry moisture, which is very conducive to drying, and the drying heat efficiency is also high. In many dryer equipment, when other conditions remain unchanged, the drying capacity of the dryer is basically proportional to the change of hot air temperature. When choosing drying equipment, we must have sufficient data on the limit temperature of destroyed materials and choose high temperature medium as far as possible when materials permit. In particular, it should be noted that many drying methods, especially fast drying, after drying the material temperature is much lower than the temperature of the drying medium. For example, the hot air temperature of airflow dryer is as high as 250 C, while the discharging temperature is generally below 60 C.
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