Energy-saving air preprocessing method and device thereof

Abstract

The invention relates to an energy-saving air preprocessing method used for the fermentation industry and a device thereof. Compressed air is introduced into a finned air cooling dehydrator device so as to lead the temperature of cooling water in a first group of tube boxes to be raised, then the hot water is divided into two parts, wherein one part enters a refrigerating unit as a hot source to produce chilled water, and the other part enters a finned air heater as a hot source to heat air; the hot water after exchanging heat by the refrigerating unit and the finned air heater returns the first group of tube boxes of the finned air cooling dehydrator device; the chilled water generated by the refrigerating unit enters the last group of tube boxes of the finned air cooling dehydrator device to cool air; and the chilled water after exchanging heat returns the refrigerating unit for cooling again. The invention uses the finned air cooling dehydrator device to absorb the waste heat of the compressed air and uses the hot water as the hot source of the refrigerating unit and the air heater, thus being energy-saving and environment-friendly; and by adopting the air cooling dehydrator device and the finned air heater, the heat exchange efficiency is high.

Description

(1) Technical field [0001] The invention relates to a compressed air pretreatment process in the fermentation industry, in particular to an energy-saving air pretreatment method and a device thereof. (2) Background technology [0002] The aerobic fermentation industry requires a constant supply of sterile dry compressed air. After being compressed by the compressor, the air will become high-temperature and high-humidity air, which cannot be directly used by the fermentation tank. It must be cooled by the air pretreatment device to remove moisture and become dry air before it can be sent to the next filter system. . [0003] Traditional compressed air pretreatment process, such as figure 1 Shown: [0004] Compressed air at 120°C to 170°C from the compressor → enters the primary shell and tube cooler 1 to cool to 50°C ~ 70°C → enters the primary cyclone water separator 2 water → enters the secondary shell and tube cooler 3 Cool to 25°C-30°C → enter the secondary cyclone wa...

AI Technical Summary

Problems solved by technology

[0008] (1) Due to the low heat exchange efficiency of the shell and tube heater to the air, the heat absorption rate is also low, so the air heating efficiency is poor;

[0009] (2) Since the heat enthalpy of the air is very small and the flow rate of the hot air in the tube is very high, when the hot air is used to directly heat the cooled air, the thermal power is very low (more than 50% of the total hot air must be used as The heat source can meet the heat energy required by the heater), so the heat exchange area of ​​the heater will be similar to that of the air cooler, so the equipment investment will increase a lot;

[0010] (3) Since a large part of the hot air first enters the heater to be heated, and then returns to the front air cooler for cooling, the wind resistance increases a lot and the air supply efficiency decreases

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