干湿联合冷却系统技术发展现状及展望

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.