Equipment for double-membrane desalination through synergistic effect of pressure field and electric field and application method

Abstract

The invention discloses equipment for double-membrane desalination through the synergistic effect of a pressure field and an electric field and an application method. The equipment comprises reverse osmosis membranes, anion and cation membranes, an electrode and the like, wherein the electrode is electrified and pressurized for inflowing water so that the equipment runs in both the electric field and the pressure field simultaneously. The reverse osmosis membranes and the anion and cation membranes in the equipment are perpendicularly arranged to form a plurality of reaction cells, and effluent water acted by the anion and cation membranes is directly drained through a water outlet pipe connected with the reaction cells. The adjacent reverse osmosis membranes are taken as a group of reverse osmosis system, and the water outlet galleries of the reverse osmosis system are formed among the membranes at intervals. The equipment is applied to realize the simultaneous conducting of reverse osmosis process and electroosmosis processes; the pressure field and the electric field have influence on each other; through the action of the pressure field, the electroosmosis effect can be enhanced, the ion migration rate can be speeded up, the desalination rate can be improved, and the energy consumption can be reduced; through the action of the electric field, the migration of ions in waste water can be promoted, the solvent migration resistance in reverse osmosis process can be reduced, the recovery rate of water can be improved, and the pollution problem of the reverse osmosis membrane can be overcome.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and energy saving, and relates to high-salt water desalination treatment equipment, in particular to a double-membrane desalination equipment and application method in which a pressure field and an electric field cooperate. Background technique [0002] Currently, with the rapid expansion of urbanization and industrialization, the economy is developing rapidly. The high salinity water discharged by major enterprises has caused great harm to the environment. The high salt in the water has caused changes in the living environment of aquatic organisms, deterioration of water quality and even death of organisms. In addition, with the increase of water demand and the shortage of fresh water resources, seawater or brackish water has to be desalinated at high cost and high investment to meet the needs of domestic and industrial water. Whether it is the desalination of high-salt water in...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: when reverse osmosis or ion-selective membrane is used alone, only rely on a single pressure field or electric field, the recovery rate of water is low, energy consumption is high, membrane pollution is serious, and in practice complex equipment

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