Compressed air dryer

Abstract

The invention relates to a compressed air dryer in the field of air dehumidifying technological equipment. The compressed air dryer comprises an adsorption tank A and an adsorption tank B which are arranged in parallel and are filled with adsorbents; the lower parts of the adsorption tank A and the adsorption tank B are connected in parallel via two air inlet valves and two humidity discharging valves; an air inlet is formed between the two air inlet valves; a silencer is arranged between the two humidity discharging valves; the upper parts of the adsorption tank A and the adsorption tank B are connected via a throttle valve, a pilot valve and two check valves; the output ends of the two check valves are opposite to each other; a moisture detection instrument and an air outlet valve are connected between the check valves. The compressed air dryer realizes two functions of drying and dehydration regeneration, realizes water closed ring automatic control, and is simple and reliable in structure; a control system adopts a PLC (programmable logic controller) and realizes accurate control, the adsorbents are active aluminum oxide particles, the adsorption force is strong, the adsorbents are in a fluid state in the adsorption tank A and the adsorption tank B, water exchange and heat exchange are conducted, the exchange efficiency is doubled, and the compressed air dryer is worthy of wide popularization and application.

Description

technical field [0001] The invention relates to the field of air dehumidification technical equipment, in particular to a compressed air dryer. Background technique [0002] The production and power of many industries need to use dry compressed air, such as vehicle painting in automobile production companies, wig production, industrial assembly lines, equipment and other power supplies. The use of dry compressed air can ensure the quality and quantity of the product and prolong the service life of the equipment. [0003] As we all know, there are two kinds of gas drying methods: adsorption method and cooling method. The adsorption method saves energy, and its drying dew point can be as low as -40°C; the cooling method consumes a lot of energy, and its dew point is only +3°C. With the same output and quality, if the cooling method consumes 1,000 yuan a day, the adsorption method only consumes 10 yuan a day, which is a hundred times the difference. Therefore, adsorption dry...

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Problems solved by technology

[0008] However, the problems in the above-mentioned patents are that the structure is complex and prone to equipment failure, which is manifested in three aspects. The first aspect is that the heat exchange cycle is carried out between the two adsorption towers through the fan and the heater, and the fan or the heater is out of order. , the whole system needs to be shut down for maintenance; secondly, heat exchange tubes are installed inside the two adsorption towers, which takes up too much space inside the adsorption towers, so that the amount of adsorbents that can be accommodated is reduced, and more importantly, complex heat transfer Pipe, working for a long time in the working environment of alternating cold and hot, the possibility of perforation will increase greatly after a long time. Orderly work, poor anti-interference, frequent malfunctions, and "crash" phenomena; fourth, there is no online measurement and control of the moisture in the dried compressed air, and the quality of the compressed air supplied to users is not guaranteed

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