Air separation system for recycling waste heat of compressed air

Abstract

The invention discloses an air separation system for recycling waste heat of compressed air. The air separation system comprises an air flow path and a purification module, and further comprises a dehumidification regeneration loop and an absorption type refrigeration circulation loop; the dehumidification regeneration loop comprises a dehumidifier, a first solution heat exchanger, a generator, afirst flow controller and a first solution pump; the absorption type refrigeration circulation loop comprises a high-temperature air channel of the generator, a condenser, an expansion element, a low-temperature evaporator, a cooling channel of the dehumidifier, an absorber, a second solution pump, a second solution heat exchanger, a second flow controller and a throttling element; and the air flow path comprises a dehumidification channel, a primary air compressor, a primary compressed air pre-cooling flow path of the generator, a first cooling unit, a primary channel of the low-temperature evaporator, a secondary air compressor, a secondary compressed air pre-cooling flow path of the generator, a second cooling unit and a secondary channel of the low-temperature evaporator which communicate with the dehumidifier in sequence, and finally, the air flow path communicates with the purification module.

Description

technical field [0001] The invention relates to an industrial air pretreatment system, in particular to an air separation system for recovering waste heat of compressed air. Background technique [0002] The development of air separation technology has a history of more than 100 years. It is an industrial technology that separates the components in the air to produce gases such as oxygen, nitrogen and argon. Widely used in industrial production, medical and other processes. Air separation equipment in turn mainly includes air compressor, air cooling system, purification system, heat exchange system, expander, rectification system and some auxiliary systems. [0003] At present, the process organization form of air in air compressors, air cooling systems and purification systems is generally as follows: firstly, the air obtained from the external environment passes through filters to roughly filter larger particle pollutants; secondly, through multiple air compressors Multi...

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Problems solved by technology

[0006] In the pretreatment process of the above-mentioned device before the air enters the heat exchange system, the relative humidity of the air before compression is relatively high, and the waste heat generated during the compression process has not been utilized.

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