Alumina ceramic energy recovery devices are core components for achieving high-efficiency energy recovery in the seawater desalination industry,Their key moving parts are made of high-purity alumina ceramic,significantly improving the reliability and lifespan of the equipment under high-salt and high-pressure environments,This device uses the principle of positive displacement to directly transfer the energy of the high-pressure concentrated brine generated during reverse osmosis to the low-pressure feed water,achieving an energy recovery efficiency of 95%–98%,