化工单元过程及操作中干燥流程工艺原理

英文回答：
The drying process in the chemical unit is the process by which wet raw materials are reduced to the required water content by certain means。

Usually the drying process involves the exposure of wet raw materials to higher temperatures， the evaporation or volatilization of their internal water through heat winds or other heating media for drying purposes。

Depending on the process requirements and feedstock characteristics，there are many methods used for drying in chemical production，including but not limited to heating air drying， vacuum drying，spray drying， roller drying， etc。

The different drying methods differ from process to process， but the water within the feedstock is converted from liquid or adsorbent to vapour
by heat transfer and then removed by dry media flow or exhaust。

化工单元中的干燥过程是将湿润的原料通过一定的方法使其含水量降
低到符合要求的工艺过程。

通常干燥过程是通过热风或其他加热介质，将湿润的原料暴露在较高的温度下，使其内部的水分蒸发或挥发出去，从而达到干燥的目的。

根据工艺要求和原料特性的不同，化工生产中
干燥过程采用的方法有很多种，包括但不限于加热空气干燥、真空干燥、喷雾干燥、滚筒干燥等。

不同的干燥方法在工艺原理上有所不同，
但都是通过热传递将原料内部的水分从液态或吸附态转变成蒸汽形式，然后通过干燥介质的流动或排气将之带走。

Process parameters for drying processes are particularly important in chemical production。

We need to consider the amount of water at the start and at the end of the feedstock，
as well as the temperature， humidity and flow speed of the dry media and the design and operation of the drying equipment。

Particular attention is paid to temperature， as high or too low can affect drying effects and the quality of raw materials。

If the feedstock is susceptible to oxidation or dposition， the effects on it of oxygen and other gases in the air are also taken into account and generally dryed under inert gas or vacuum conditions。

In the drying process， recycling and exhaust treatment of dry media should also be considered in order to avoid environmental contamination by the release of volatile substances。

在化工生产中，干燥过程的工艺参数设置特别重要。

我们得考虑原料
开始时的含水量和结束时要求的含水量，还有干燥介质的温度、湿度
和流速，以及干燥设备的设计和操作方式。

特别要注意的是温度，因
为太高或太低都会影响干燥效果和原料品质。

如果原料容易氧化或分解，还要考虑氧气和空气中其他气体对它的影响，一般会在惰性气体
或真空条件下进行干燥。

在干燥过程中，还得考虑干燥介质的循环利
用和排气处理，以免挥发性物质泄漏污染环境。

Drying processes are widely used in chemical production，covering almost all sectors of production。

Production processes such as food， medicine， pesticides， fertilizers，ceramics， building materials， chemical materials and particulate matter require drying processes。

In—depth research and practical experience on the principles of dry process processes are important for improving product quality，saving energy and reducing production costs。

干燥工艺在化工生产中具有广泛的应用，几乎涵盖了各行各业的生产
领域。

食品、医药、农药、化肥、陶瓷、建材、化工原料、颗粒状物
料等生产过程均需要进行干燥工艺。

对干燥过程工艺原理的深入研究
和实践经验的积累具有重要意义，可有效提高产品质量、节约能源、
降低生产成本等。