Choose a suitable compressed air drying equipment There are many kinds of equipment for drying compressed air: no heat regeneration drying device, micro heating drying device, external heating drying device, freeze drying device, composite drying device and so on. The composite drying device is further divided into a non-heat regeneration composite drying device, a micro heating composite drying device, and an external heating composite drying device. These drying devices have their own characteristics, and the most used ones are the non-heat regeneration drying device, the freeze drying device and the non-heat regeneration composite drying device. The non-thermal regenerative drying device, also known as the self-heating drying device, uses the physicochemical interaction between the adsorbate and the adsorbent to obtain dry compressed air, the process consumes the dried compressed air; the freeze-drying device uses the freezing device Compressed air is chilled to the desired dew point; the non-thermal regenerative composite drying device uses a refrigerating device and a non-thermal regenerative drying device to complete the drying of compressed air. It first uses a freezing device to freeze the compressed air to remove a large amount of moisture contained in the air. Then, it is subjected to athermal regeneration drying, and then the moisture other than the desired dew point in the compressed air is removed.

When using, it should be selected according to the technical and economic comparison of the user's requirements for compressed air. The non-thermal regenerative drying device has a simple structure, is convenient to use, and is inexpensive, and can obtain compressed air with a low dew point. For a long period of time in the past, most users use a non-thermal regenerative drying device. The disadvantage of the non-thermal regenerative drying device is that the dew point is unstable and the running cost is high. The operation practice shows that the new equipment without heat regeneration drying device can ensure that the dew point of compressed air can reduce the air quality after running for a period of time; in the same cycle, the outlet air quality is good at the beginning, and the air quality near the end is poor. If not managed properly, it is almost impossible to achieve the required compressed air dew point for a non-thermal regenerative drying unit after two years of operation. The regeneration gas consumption of the athermal regeneration drying device is 13% 15% of the compressed air load, meaning that 1315% of the air compression power is used for gas drying. For example, the 40mPmin dew point is -40e dry gas, the motor power is 250kW, and the power for gas drying is about 3238kW.

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