High-pressure solution dehumidification and afterheat recovery device with adjustable pressure dew point, and high-pressure solution dehumidification and afterheat recovery method

Abstract

The invention discloses a high-pressure solution dehumidification and afterheat recovery device with adjustable pressure dew point, and a high-pressure solution dehumidification and afterheat recoverymethod. The device comprises a compressed air treatment system, an ordinary pressure solution regeneration system and a water chilling unit module, wherein the compressed air treatment system comprises an ordinary pressure dehumidifier and a high-pressure dehumidifier in mutual connection; the water chilling unit module comprises a condenser, a compressor, an evaporator and a water tank; bottom liquid outlets of the ordinary pressure dehumidifier and the high-pressure dehumidifier are respectively connected with a heat exchanger and the condenser, and are finally connected with a dilute solution liquid inlet of the ordinary pressure solution regeneration system through the heat exchanger and the condenser; top liquid inlets of the ordinary pressure dehumidifier and the high-pressure dehumidifier are respectively connected with a concentrated solution outlet of the ordinary pressure solution regeneration system through a solution cooler. The device and the method achieve the effects ofreducing the energy consumption of an air compressor and the compressed air drying process and the improving the energy source utilization rate. In addition, the requirements on different dry degreecompressed air between -40 DEG C and 0 DEG C are met; the lower pressure dew point and the adjustability are realized.

Description

technical field [0001] The invention relates to a high-pressure solution dehumidification and waste heat recovery device and method with adjustable pressure dew point, belonging to the technical field of compressed air drying. Background technique [0002] Compressed air is one of the most widely used power sources in today's society, and it is the second largest power source after electricity. It is widely used in petroleum, chemical, electric power, machinery and other industries. When the moisture content in the compressed air exceeds a certain amount, it will cause corrosion of pipeline valves, deterioration of food, reduction of insulation performance of electrical appliances, and stability of pneumatic systems, which will have extremely adverse effects on the production process. In the process of compressing the air, the air compressor consumes a lot of electric energy, and a considerable part of the electric energy will be discharged into the surrounding environment i...

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Problems solved by technology

For example, freeze dehumidification has the following three disadvantages: first, the dehumidification effect is good only when the dew point temperature is higher than 2°C; second, when the dew point temperature is lower than 0°C, the cooling coil will frost and dehumidify The effect is greatly reduced, and a large amount of electric energy is consumed at the same time; third, the leakage of Freon in the refrigeration system will cause a series of adverse effects on the environment

Although solid adsorption drying can effectively dry and dehumidify compressed air in depth, it requires large regeneration energy and high regeneration temperature (generally above 100°C), and at the same time, the equipment is bulky and the initial investment cost is high.

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