Water purifier and water purification method based on dielectrophoresis nano-membrane and electrodialysis

Abstract

The invention discloses a water purifier and a water purification method based on a dielectrophoresis nano-membrane and electrodialysis. In the purifier, the first side of a negative dielectrophoresispurification device is communicated with an inlet pump to introduce water, the pore section of a nano-porous membrane is two symmetrical arcs, the pore diameter is gradually reduced from top to bottom, water from the inlet pump flows through the nano-porous membrane under the action of gravity and the action of a non-uniform electric field in order to be purified, a plurality of anionic membranesare arranged between a first electrode and a second electrode, and anions in the water penetrate through the anionic membranes and cations cannot penetrate through the anionic membranes under the action of an electric field generated by the electrified first electrode and second electrode; and the plurality of cationic membranes are arranged between the first electrode and the second electrode, each cationic membrane and each anionic membrane are alternately arranged, when an electrodialysis device works, a three-way valve controls a drain outlet to be closed, a fourth outlet is opened to collect desalted water, and an electrode reversing device is arranged in a circuit of the electrodialysis device and a power supply to replace positive and negative polarities of the first electrode andthe second electrode.

Description

technical field [0001] The invention relates to the technical field of multi-stage purification and decontamination of tap water, waste water or sewage, in particular to a water purifier and method based on dielectrophoretic nano-membranes and electrodialysis. Background technique [0002] Water is an indispensable and important material for all life on earth, human life and production activities, and an irreplaceable important natural resource. With economic development, population growth and improvement of people's material and cultural level, the demand for water is increasing all over the world. The total amount of water resources in my country is relatively abundant, but the per capita amount of water is small and unevenly distributed. There are currently very few freshwater resources available to cities. The contradiction between the shortage of urban water resources and the amount of water needed for urban economic and cultural development has become increasingly pr...

AI Technical Summary

Problems solved by technology

However, electrodialysis is prone to polarization during application, which causes a part of electric energy to be wasted on water ionization, which reduces the current efficiency; scaling and precipitation in the electrodialysis device will greatly affect the performance of the membrane and increase the resistance of the membrane. , the mechanical strength decreases and the service life of the membrane is shortened

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