Each drying equipment has a specific scope of application, each material can find several kinds of drying equipment that can meet the basic requirements, but only one is suitable. If the model is not selected properly, the user not only has to bear the unnecessary one-time high procurement cost, but also has to pay the heavy price of the whole service life, such as low efficiency, high energy consumption, high operating cost, poor product quality, and even the equipment can not operate normally.

以下是干燥设备选型的原则，很难说哪一项或哪几项是重要的，理想的选型必须根据自己的条件有所侧重，有时折中是必要的。

The following is the principle of drying equipment selection, it is difficult to say which one or which one is important, the ideal selection must be based on their own conditions, sometimes compromise is necessary.

1.适用性——干燥设备必须适合特定物料，满足物料干燥的基本使用要求，包括物料的良好处理(进料、输送、流化、分散、传热、出料等)。)，并满足处理量、脱水量和产品质量的基本要求。

1. Applicability - the drying equipment must be suitable for specific materials and meet the basic requirements for drying materials, including good treatment of materials (feeding, conveying, fluidization, dispersion, heat transfer, discharging, etc.), And meet the basic requirements of processing capacity, dehydration capacity and product quality.

2.干燥速率高——就干燥速率而言，物料在对流干燥时高度分散在热空气中，临界含水率低，干燥速度快，也是对流干燥。不同的干燥方法有不同的临界含水率和不同的干燥速率。

2. High drying rate - in terms of drying rate, materials are highly dispersed in hot air during convection drying, with low critical moisture content and fast drying speed, which is also convection drying. Different drying methods have different critical moisture content and different drying rate.

3.耗能低——不同干燥方法耗能指标不同。

3. Low energy consumption - different drying methods have different energy consumption indexes.

4.节约投资——完成同样功能的干燥设备，有时成本差异大，应选择低者。

4. Saving investment: for drying equipment with the same function, sometimes the cost difference is large, so the lower one should be selected.

5.运行成本低——设备折旧、能源消耗、人工费、维护费、零部件费等运行费用尽量便宜。

5. Low operation cost: the operation cost such as equipment depreciation, energy consumption, labor cost, maintenance cost and parts cost should be as cheap as possible.

6.优先选用结构简单、备件供应充足、可靠性高、使用寿命长的干燥设备。

6. The drying equipment with simple structure, sufficient supply of spare parts, high reliability and long service life is preferred.

7.符合环境保护要求，工作条件好，安全性高。

7. Meet the requirements of environmental protection, good working conditions and high safety.

8.选型前能做出物料的干燥实验，深入了解类似物料已经使用的干燥设备（优缺点），往往对恰当选型有帮助。

8. It is helpful to make drying experiments of materials before type selection, and deeply understand the drying equipment (advantages and disadvantages) used for similar materials.