Multi-unit seawater desalination device and multi-unit seawater desalination method

Abstract

The invention discloses a multi-unit seawater desalination device and a multi-unit seawater desalination method. The multi-unit seawater desalination device comprises a pretreatment unit, a desalination unit, a distribution unit and a concentrated water treatment unit. The pretreatment unit comprises a water drawing pump, an air flotation machine and a raw water tank; the desalination unit comprises a multi-media filter, a security filter and a reverse osmosis apparatus; the distribution unit comprises a mineralization filter, a water storage tank and a variable-frequency constant-pressure water supply mechanism; the concentrated water treatment unit comprises a concentrated water pond, an aerating biological filter chamber and an electrolysis mechanism. The multi-unit seawater desalination method includes sequentially carrying out alga removing, impurity filtering, reverse osmosis and mineralization treatment; electrolyzing reverse osmosis concentrated water and then adding the reverse osmosis concentrated water into seawater with algae to be removed. The multi-unit seawater desalination device and the multi-unit seawater desalination method have the advantages that organic matters such as the algae in the seawater can be removed by the aid of the air flotation machine, accordingly, workload on desalination films of the reverse osmosis apparatus can be relieved, and the service life of the reverse osmosis apparatus can be advantageously prolonged; the concentrated water treated by the aid of the reverse osmosis apparatus can be electrolyzed by the aid of the electrolysis mechanism, sodium hypochlorite solution formed by means of electrolysis can be added into the air flotation machine and / or the raw water tank, accordingly, the alga organic matters can be oxidized, andstench of fresh water which is already subjected to reverse osmosis can be prevented.

Description

technical field [0001] The invention relates to seawater desalination technology, in particular to a multi-unit seawater desalination device and method. Background technique [0002] At present, with the increasingly serious problem of water shortage, reverse osmosis devices that can convert seawater into fresh water have been widely used. Then, with the continuous deterioration of the marine environment, abnormal phenomena often occur in the marine ecosystem, such as red tides, which put forward new requirements for reverse osmosis devices that use seawater as a water source, that is, more in-depth pretreatment of seawater is required. Especially for the treatment of marine algae, otherwise, the fresh water formed after the reverse osmosis of the reverse osmosis device has a fishy smell, which is not conducive to the experience of using the reverse osmosis fresh water. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentio...

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Problems solved by technology

Then, with the continuous deterioration of the marine environment, abnormal phenomena often occur in the marine ecosystem, such as red tides, which put forward new requirements for reverse osmosis devices that use seawater as a water source, that is, more in-depth pretreatment of seawater is required. Especially for the treatment of marine algae, otherwise, the fresh water formed after reverse osmosis of the reverse osmosis device has a fishy smell, which is not conducive to the experience of using reverse osmosis fresh water

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