Waste heat recovery system of water injection screw air compressor

Abstract

The invention provides a waste heat recovery system of a water injection screw air compressor. The waste heat recovery system comprises a heat exchanger, an oil temperature control system, a constant temperature water supply system, an oil cooler which is connected with the oil temperature control system and a cooling water control system which is connected with the oil cooler, wherein the oil temperature control system and the constant temperature water supply system are connected with the heat exchanger; the oil temperature control system comprises an oil temperature sensor, a three-way control valve and an oil temperature control device which is connected with the oil temperature sensor and the three-way control valve. Compared with the prior art, the waste heat recovery system of the water injection screw air compressor can monitor the temperature of lubricating oil and circulating water by a sensor technology in real time, and can also control and adjust strictly. The damage to a compressor machine which is caused by too high oil temperature is avoided, the electricity consumption of a water pump is reduced, high efficiency and stability for the operation of the equipment are ensured, and the purpose of energy saving is achieved.

Description

technical field [0001] The invention relates to air compressor technology, in particular to a waste heat recovery system of a water-cooled oil-injected screw air compressor. Background technique [0002] Oil-injected screw air compressor has become the mainstream of air compressor development in the world today, and it can be widely used in mining, machinery manufacturing, construction, textile, petrochemical and other places that require compressed air. The existing oil-injected screw air compressor system mainly includes an air compressor, an oil-air separator and an oil cooler. During operation, the circulating cooling lubricating oil in the air compressor enters the oil cooler after passing through the oil-air separator, and is cooled by the oil. During the entire operation of the oil-injected screw air compressor, about 90% of the input electric energy is converted into heat energy, and more than 70% of the heat energy is directly brought to the oil by the circulating c...

AI Technical Summary

Problems solved by technology

The existing oil-injected screw air compressor system mainly includes an air compressor, an oil-air separator and an oil cooler. During operation, the circulating cooling lubricating oil in the air compressor enters the oil cooler after passing through the oil-air separator, and is cooled by the oil. During the entire operation of the oil-injected screw air compressor, about 90% of the input electric energy is converted into heat energy, and more than 70% of the heat energy is directly brought to the oil by the circulating cooling lubricating oil. In the cooler, it is dissipated by exchanging heat with the cooling medium in the oil cooler. In this process, a large amount of heat energy has not been effectively utilized, resulting in waste and failing to meet energy-saving requirements.

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