Everyone is paying attention to low-carbon life, and the best and most cost-effective low-carbon life is to use existing natural resources for integrated utilization, such as solar energy, wind energy, biomass energy and geothermal energy, etc., such as using wind power to generate heat, using solar energy to generate heat Or desalination, which not only saves costs, but also greatly reduces the pressure on the earth, making a great contribution to environmental protection.

The use of solar energy for seawater desalination is an effective method to solve the lack of freshwater resources in my country. There are many methods of solar seawater desalination. In order to reduce the evaporation temperature of seawater, vacuum pumps are usually used to achieve negative pressure evaporation, thereby reducing the boiling and evaporation temperature of seawater. The role of vacuum pumps can also be Change the flow of water vapor to facilitate heat transfer and condensation. Therefore, the vacuum pump plays a crucial role in the desalination system. Its working performance has a great influence on the entire seawater desalination system. Therefore, the vacuum pump is required to have reliable performance, stable operation, low energy consumption, capable of generating a large vacuum degree and sufficient pumping rate.

At present, the vacuum pumps used for seawater desalination mainly include water jet vacuum pump and water ring vacuum pump. The working principle of the water jet vacuum pump is to use the high-speed water flow generated by the pressure difference to extract the gas. It has a simple structure and can pump condensable gases such as water vapor. characteristics, but its low efficiency and large power consumption. The water ring vacuum pump relies on the rotation of the eccentric impeller in the pump casing, and throws the water to the pump casing to form a concentric water ring with the pump casing. The water ring and the rotor blades form a periodic volume change to inhale, compress and discharge the gas. When the vacuum is high, the pumping speed is large, and it can pump condensable gases such as water vapor. Compared with the water jet vacuum pump, its power consumption is low, the efficiency is high, and the structure is compact. At the same time, the vacuum generated can meet the requirements of seawater desalination. Water ring vacuum pump is more suitable for negative pressure seawater desalination system.

The water ring vacuum pump is applied to the solar seawater desalination system, and a new type of solar seawater desalination device is proposed. Through the experimental research on the working performance of the water ring true pump, the variation law between the vacuum degree and the pumping speed of the system is obtained, which is The performance matching of seawater desalination system and vacuum pump and the determination of optimal operating parameters have laid a theoretical foundation.