Power plant high-salt wastewater co-drying system for direct air-cooling unit and energy-saving operation method

By atomizing high-salt wastewater in an air-cooled tower and using the air volume and sensible heat of the air-cooling system for evaporation and drying, the problem of high cost and high energy consumption in the treatment of high-salt wastewater in direct air-cooled units is solved, achieving low cost, zero emissions and reduced energy consumption, and is suitable for retrofitting new and old units.

CN122144831AActive Publication Date: 2026-06-05CHINA JILIANG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA JILIANG UNIV
Filing Date
2026-05-08
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies for treating high-salt wastewater in direct air-cooled units are costly and energy-intensive, and are prone to scaling and clogging, making it difficult to meet continuous treatment requirements and affecting the stable operation of the system.

Method used

A wastewater atomization device is installed inside the air-cooled tower to atomize high-salt wastewater into droplets and spray them into the air-cooled tower duct. The air volume and sensible heat of the air-cooling system are used for evaporation and drying. Salt particles are captured by a dust collector. The intelligent control system adjusts the amount of wastewater injected and the air volume of the fan to ensure complete evaporation and system stability.

Benefits of technology

It achieves low-cost, zero-emission treatment of high-salt wastewater, significantly reduces energy consumption of air-cooled systems, improves heat exchange efficiency, ensures the safety of main equipment, is suitable for retrofitting new and old units, and has broad application prospects.

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Abstract

The application discloses a power plant high-salt wastewater collaborative drying system and an energy-saving operation method for a direct air cooling unit. The system comprises an air cooling tower, an air cooling fan, a finned tube heat exchanger, a wastewater atomization device, a dust collector and a matched control system. The energy-saving operation method comprises the following steps: step one, data acquisition and initialization; step two, safety mode judgment; step three, collaborative optimization solution; and step four, closed loop verification and dynamic adjustment. Compared with the traditional technology, the application fully utilizes the low-grade heat carried by the huge air inlet of the air cooling tower, realizes zero discharge of high-salt wastewater drying at low operation cost, and significantly strengthens the air cooling heat exchange through air inlet humidification, so that the fan air volume and power consumption can be reduced under the premise of ensuring the cooling effect, and the operation economy and system operation safety of the unit are improved.
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