Water is the source of life. China is one of the countries with the most water shortage, and the per capita fresh water resources ranks 109th in the world. At the same time, China's waters are generally polluted to varying degrees, further reducing the amount of fresh water available. Therefore, the state vigorously promotes desalination and sewage purification industries. At present, seawater desalination technologies such as reverse osmosis and distillation generally have problems such as high energy consumption, high cost, large investment, and dependence on a large amount of electric energy.
Huasheng Graphite Co., Ltd. and the University of South Australia have jointly developed a new technology that uses independent intellectual property rights and masters core technologies to fully utilize sunlight to achieve desalination and sewage treatment. This technology is the world's first use of graphene composite high-efficiency photothermal conversion materials to convert sunlight directly into heat energy, and is limited to the micron-scale water evaporation film, thus achieving rapid evaporation of seawater.
The company has broken through the preparation of high-efficiency graphene composite photothermal materials for solar graphene desalination systems, ultra-thin water film evaporation structure design and preparation based on graphene composite photothermal materials, and high-efficiency recovery of steam and waste heat. The experimental system has been running smoothly, the water quality has reached the drinking water standard, and the estimated seawater desalination cost can be controlled below 3 yuan/ton. The company has partnered with the Australian South Australian Government to study the use of this technology for the treatment of saline-alkali water in the largest river basin in South Australia.