Pumped storage-type wind energy directly-driven seawater desalination integrated system

Abstract

The invention discloses a pumped storage-type wind energy directly-driven seawater desalination integrated system. The system comprises a seawater desalination unit, a pumped storage unit, a water storage pool, an energy conversion device, a pretreatment pool and related pipes. The pretreatment pool is respectively connected to water inlet pipes of the pumped storage unit and the seawater desalination unit. A water outlet pipe of the pumped storage unit is communicated with the water storage pool. The water storage pool, the energy conversion device and the seawater desalination unit are coupled. A water return pipe of the energy conversion device is communicated with the pretreatment pool. The seawater desalination unit is driven by mechanical energy provided by a wind turbine and a hydraulic turbine so that stable fresh water output is guaranteed, and the pumped storage unit and the seawater desalination unit can be reasonably combined according to practical situation. The system has the characteristics of simple structure, high energy conversion efficiency, good stability, good reliability, operation simpleness, low investment and operation cost, and wide adaptation range, and is suitable for building of large-scale wind energy seawater desalination engineering.

Description

Technical field [0001] The invention belongs to the technical field of seawater or brackish water desalination, and particularly relates to a pumped storage type wind energy directly driven seawater desalination integrated system. Background technique [0002] Desalination of seawater or brackish water is an effective strategic way to solve the problem of shortage of freshwater resources. Vigorously developing cheap renewable energy and using it for desalination will be an important way to solve the high cost of desalination. The wind energy resources on the sea and islands are very rich, with high wind speed and relatively stable characteristics, so wind energy is an important energy choice for seawater desalination. At present, there are two main ways for wind energy seawater desalination: (1) wind power seawater desalination (separate type); (2) wind power directly drives seawater desalination (coupled type). Due to the advancement of wind power technology, wind power desalin...

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Problems solved by technology

However, the above-mentioned devices are all independent operating systems, and each device is equipped with a regulating device and its control system, which is more suitable for a small-scale independent operation mode, and is not suitable for the construction of large-scale seawater desalination projects.

Since large-scale seawater desalination projects often require dozens or even hundreds of wind turbines to operate at the same time, if each wind-powered seawater desalination unit has its own energy storage device and control system, the entire system will be more complicated, and its operability and reliability also poor

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