干燥设备都有哪些分类类型？

用于进行干燥操作的设备。类型很多。根据操作压力可分为常压和减压。根据操作方法可分为间歇式和连续式。根据干燥介质可分为空气、烟道气或其他干燥介质。根据运动方式可分为并流，逆流和错流。

Equipment used for drying operations. There are many types. According to the operating pressure can be divided into normal pressure and decompression. According to the operation method can be divided into intermittent and continuous. According to the drying medium can be divided into air, flue gas or other drying medium. According to the movement mode, it can be divided into parallel flow, counter flow and cross flow.

干燥设备的分类类型：

Classification type of drying equipment:

1、按操作压力

1. By operating pressure

   
   

按操作压力，干燥器分为常压干燥器和真空干燥器两类，在真空下操作可降低空间的湿分蒸汽分压而加速干燥过程，且可降低湿分沸点和物料干燥温度，蒸汽不易外泄，所以，真空干燥器适用于干燥热敏性、易氧化、易爆和有毒物料以及湿分蒸汽需要回收的场合。

According to the operating pressure, dryers can be divided into atmospheric pressure dryers and vacuum dryers. Operating in vacuum can reduce the partial pressure of wet steam in the space, accelerate the drying process, and reduce the wet boiling point and material drying temperature. The steam is not easy to leak out. Therefore, vacuum dryers are suitable for drying heat sensitive, easily oxidized, explosive and toxic materials, and wet steam needs to be recycled.

2、按加热方式

2. By heating mode

按加热方式，干燥器分为对流式、传导式、辐射式、介电式等类型。对流式干燥器又称直接干燥器，是利用热的干燥介质与湿物料直接接触，以对流方式传递热量，并将生成的蒸汽带走；传导式干燥器又称间接式干燥器，它利用传导方式由热源通过金属间壁向湿物料传递热量，生成的湿分蒸汽可用减压抽吸、通入少量吹扫气或在单独设置的低温冷凝器表面冷凝等方法移去。

According to heating mode, dryers are divided into convection type, conduction type, radiation type, dielectric type, etc. Convection dryer, also known as direct dryer, is the use of hot drying medium in direct contact with wet materials to transfer heat by convection and take the generated steam away; conduction dryer, also known as indirect dryer, uses the conduction mode to transfer heat from the heat source to the wet materials through the metal wall, and the generated wet steam can be pumped by decompression, injected with a small amount of purge gas or in the single tube The surface of the low-temperature condenser is removed by condensation.

这类干燥器不使用干燥介质，热效率较高，产品不受污染，但干燥能力受金属壁传热面积的限制，结构也较复杂，常在真空下操作；辐射式干燥器是利用各种辐射器发射出一定波长范围的电磁波，被湿物料表面有选择地吸收后转变为热量进行干燥；介电式干燥器是利用高频电场作用，使湿物料内部发生热效应进行干燥。

This kind of dryer does not use drying medium, has high thermal efficiency, and the product is not polluted, but its drying capacity is limited by the heat transfer area of metal wall, and its structure is more complex, so it is often operated under vacuum; the radiation dryer uses various radiators to emit electromagnetic waves in a certain wavelength range, which are selectively absorbed by the surface of wet materials and then converted into heat for drying; the dielectric dryer is a new type of dryer High frequency electric field is used to dry the wet material.

3、按运动方式

3. By sport

用于进行干燥操作的设备，通过加热使物料中的湿分（一般指水分或其他可挥发性液体成分）汽化逸出，以获得规定含湿量的固体物料。干燥的目的是为了物料使用或进一步加工的需要。如木材在制作木模、木器前的干燥可以防止制品变形，陶瓷坯料在煅烧前的干燥可以防止成品龟裂。

The equipment used for drying operation vaporizes moisture (generally water or other volatile liquid components) in the material by heating to obtain solid material with specified moisture content. The purpose of drying is to meet the needs of material use or further processing. For example, the drying of wood before making wood mold and wood ware can prevent deformation of products, and the drying of ceramic blank before calcination can prevent cracking of finished products.

另外干燥后的物料也便于运输和贮存，如将收获的粮食干燥到一定湿含量以下，以防霉变。由于自然干燥远不能满足生产发展的需要，各种机械化干燥器越来越广泛地得到应用。

In addition, the dried materials are also convenient for transportation and storage, such as drying the harvested grain to a certain moisture content to prevent mildew. As natural drying is far from meeting the needs of production development, all kinds of mechanized dryers are more and more widely used.