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冷干机中预冷机主要起什么作用

新闻来源:杭州日丰空气处理设备有限公司    发布日期:2017.12.08

预冷器是一直空气─空气热交换器。在冷干机中既是制冷系统的冷量回收设备,也起到脱水后低温空气回热器作用。它是冷干机的主要组成部分,也是冷干机区别于其他制冷设备的特征条件。

The precooler is an air - air heat exchanger. In the cold drying machine, it is not only the cooling equipment of the refrigeration system, but also the function of the low temperature air regenerator after dehydration. It is the main component of the cold drying machine, and it is also the characteristic condition that the cooling machine is different from other refrigeration equipment.

严格来讲,预冷器并不是冷干机的必备部件,但它在冷干机运行中又起很大的作用。预冷器在冷干机中的主要作用就是回收被蒸发器冷却后的压缩空气所携带的冷量(对绝大部分用户来讲这部分冷量属于“废冷”),并用这部分冷量来冷却携带大量水蒸气的较高温度的压缩空气,从而减轻了冷干机制冷系统的热负荷,达到节约能源的目的

Strictly speaking, the precooler is not a necessary part of the cold drying machine, but it plays a great role in the operation of the cold dryer. The pre cooler is the recovery of cold quantity is carried by the evaporator cooling the compressed air in the cold and dry machine in the main role (for the vast majority of users, this part of the cold are wasted cold), and this part of the cold energy cooling to carry large amounts of water vapor in the higher temperature of the compressed air, thus reducing the heat the load mechanism of cold dry cooling system, to achieve the purpose of saving energy 。

另一方面,低温压缩空气在预冷器里温度得到回升,使排气管道外壁不致因温度过低而出现挂露现象。此外,压缩空气温度升高后,降低了管道内空气的相对湿度(可达5-10%)。根据金属锈蚀理论,当环境相对湿度低于零界点(40%)时,金属管道生锈现象便会停止。所以在冷干机中都设有预冷器。

. On the other hand, the temperature of the low temperature compressed air in the precooler is recovered, which makes the outer wall of the exhaust pipe appear to be exposed because of the low temperature. In addition, when the compressed air temperature rises, the relative humidity of the air in the pipe is reduced (up to 5-10%). According to the theory of metal corrosion, when the environmental relative humidity is lower than the critical point (40%), metal pipe rust will stop. So there is a precooler in the cold drying machine.



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