实用 | 干燥机选型的重要性

干燥机的用途是干燥压缩空气的。按干燥程度不同分为冷干机和吸干机。冷干机采用冷冻原理，而吸干机采用的是选择性吸附原理。

The purpose of dryer is to dry compressed air. According to the degree of drying, it can be divided into cold dryer and suction dryer. The cold dryer adopts the principle of freezing dehumidification, while the suction dryer adopts the principle of selective adsorption.

干燥机在选用过程中，要特别注意与压缩机，工况和环境条件相匹配，这个匹配的过程称为选型，这是用好干燥机必须过程之一。

In the selection process of dryer, special attention should be paid to matching with compressor, working condition and environmental conditions. This matching process is called type selection, which is one of the necessary processes to make good use of dryer.

1.为什么要选型？

1. Why choose a model?

制造商基本都是按照行业标准来设计和制造干燥机的。两个标准中都给出了作为基准的额定工况，而实际干燥机的工作条件往往会出现偏离。

Manufacturers are basically in accordance with industry standards to design and manufacture dryer. Both of the two standards give the rated working conditions as the benchmark, but the actual working conditions of the dryer often deviate.

无论是冷干机还是吸干机，工作条件发生变化后，处理压缩空气的能力也发生变化。如果变化导致负荷变大，那么干燥机的额定处理量需要进行修正，修正后的处理量与实际处理量匹配的情况下才能获得好的使用效果。

Whether it is a cold dryer or a suction dryer, the ability to handle compressed air changes with the change of working conditions. If the load becomes larger due to the change, the rated capacity of the dryer needs to be modified, and only when the modified capacity matches the actual capacity can the good use effect be obtained.

如何选型？

How to select the type?

干燥机的基本选型分为如下四个步骤：

The basic selection of dryer is divided into the following four steps:

一，确定安装现场条件，是否具备冷却水条件，并确定干燥机的冷却型式（如需要）；

1、 Determine the installation site conditions and cooling water conditions, and determine the cooling type of dryer (if necessary);

二，确定选型参数，如压缩空气大流量，高进气温度，低进气压力，高冷却介质温度，以及环境温度和湿度，需求点；

2、 Determine the selection parameters, such as large flow of compressed air, high inlet temperature, low inlet pressure, high cooling medium temperature, ambient temperature and humidity, demand point;

三，根据干燥机制造商的样本上的修正系数和公式选择合适型号的干燥机，并确认干燥机是否适用安装地点的环境温湿度；

3、 Select the appropriate model of dryer according to the correction coefficient and formula on the dryer manufacturer's sample, and confirm whether the dryer is suitable for the ambient temperature and humidity of the installation site;

四，评估干燥机的综合能耗。

4、 Evaluate the comprehensive energy consumption of dryer.