2024年全国有海水淡化工程158个，工程规模285.6万吨/日。辽宁、山东、江苏、浙江、福建、广东年 海水冷却用水量超过百亿吨。 我国海水资源梯次多元化高效利用收到明显成效，截至目前，全国有海水淡化工程158个，沿海省市推 进大型海水淡化工程建设，为沿海电力、石化、钢铁等高耗水行业用水提供可靠水源保障。 自然资源部海洋战略规划与经济司18日发布《2024年全国海水利用报告》（下称《报告》）。《报告》 显示，2024年全国有海水淡化工程158个，工程规模285.6万吨/日，比2023年增加了33.3万吨/日。2024 年全国海水冷却用水量1883.36亿吨，比2023年增加29.57亿吨。辽宁、山东、江苏、浙江、福建、广东 年海水冷却用水量超过百亿吨。 天津、山东、江苏、浙江等沿海省市推进大型海水淡化工程建设，为沿海电力、石化、钢铁等高耗水行 业用水提供可靠水源保障；天津、河北、山东、福建等地开展海水提溴、提钾工艺技术装备研发与成果 转化，探索海水资源梯次多元化高效利用，提高资源利用效率。 海水利用主要包括海水淡化、海水直接利用和海水化学资源利用。2024年3月，国务院颁布的《节约用 水条例》提出"沿海地区应 ...

Core Insights - The Ministry of Natural Resources has released the "2024 National Seawater Utilization Report," highlighting significant developments in seawater desalination and cooling water usage in China [1] Desalination Developments - In 2024, there are 158 existing seawater desalination projects in China, with a total capacity of 2.856 million tons per day, an increase of 333,000 tons per day compared to 2023 [1] - Coastal provinces such as Tianjin, Shandong, Jiangsu, and Zhejiang are actively advancing large-scale seawater desalination projects to ensure reliable water supply for high-water-consuming industries like power, petrochemicals, and steel [1] - Breakthroughs have been made in domestically developed seawater desalination equipment, with the fifth production line of the Tianjin Nangang Industrial Zone's integrated seawater desalination and comprehensive utilization project achieving full localization of key equipment such as reverse osmosis membranes, high-pressure pumps, and energy recovery devices [1] Cooling Water Usage - The total seawater cooling water usage in 2024 is projected to be 188.336 billion tons, an increase of 2.957 billion tons from 2023 [1] - Provinces including Liaoning, Shandong, Jiangsu, Zhejiang, Fujian, and Guangdong have annual seawater cooling water usage exceeding 10 billion tons [1] - Regions such as Tianjin, Hebei, Shandong, and Fujian are actively developing and transforming technologies for seawater extraction of bromine and potassium, exploring efficient and diversified utilization of seawater resources to enhance resource efficiency [1]