Abstract:

Cooling systems play an important role in industrial processes. The wet and/or dry cooling system have obvious advantages and disadvantages. The wet cooling unit possesses higher thermal economics, however, it is limited by the large water consumption due to the relative shortage of water resources in China. The dry cooling systems also have many tough issues to be solved, such as huge investment, limitations of environmental temperature and other conditions. The dry and wet combined cooling system is the development trend of cooling system in coal chemical, petrochemical, and power industries, which combines the advantages of dry cooling system and wet cooling system. Based on the development of the dry cooling system and wet cooling system, the formation and classification of the dry and wet combined cooling system are summarized. This study investigated the latest status of the system model, main equipment and optimization of the dry and wet combined cooling systems. On this basis, the application of water-saving demisting, dew point cooling and other technologies in the dry and wet combined cooling systems were summarized, and the further research directions were prospected. It is of great significance for the theoretical research, engineering practice and system operation of the dry and wet combined cooling system.

Key words: dry and wet combined cooling system, model, evaporation, optimization

摘要：

冷却系统在工业生产过程中起着至关重要的作用。湿冷系统或空冷系统都有比较明显的优缺点，湿冷机组虽然热经济性高，但耗水量大，而我国的水资源相对紧张。空冷也有很多棘手的问题有待解决，如投资非常大，受环境温度等条件的限制多。干湿联合冷却系统同时兼顾干冷系统和湿冷系统优点，是煤化工、石油化工、电力等行业冷却系统的发展趋势。本文基于空冷系统和湿冷系统的发展，对干湿联合冷却系统的形成和分类进行了综述。着重阐述了干湿冷却系统模型、主要设备、系统优化等研究方向的国内外最新现状。在此基础上，对节水消雾、露点冷却和其他应用于干湿联合冷却系统的技术进行了综述，并对进一步值得研究的重点方向进行了展望，为干湿联合冷却系统的理论研究、工程实践、系统运行提供参考。

关键词: 干湿联合冷却系统, 模型, 蒸发, 优化