Seawater desalination process method for source water pretreatment by using biological method

Abstract

The invention relates to the field of seawater desalination processes, in particular to a seawater desalination process method for source water pretreatment by using a biological method. The method of the embodiment comprises of the invention the following steps: introducing seawater into a source water deposition tank to deposit; introducing the deposited source water into a high-density industrialized seawater fish culturing pool to carry out the source water pretreatment to obtain low-impurity seawater; providing the low-impurity seawater to a multi-medium filter via a water supply pump; filtering via the multi-medium filter to obtain pure seawater; injecting the pure seawater to an RO (Reverse Osmosis) main engine via a high pressure pump and desalinating the seawater through the reverse osmosis membrane effect of the RO main engine; and recycling the hydraulic pressure energy in the remaining desalinated concentrated seawater via an energy recycling device and discharging the concentrated seawater. In the invention, the desalination cost is reduced, the economic benefit is increased, and in addition, the impact of a seawater desalination plant on the environment during production process is minimized, therefore, sustainable development of resource utilization is realized.

Description

technical field [0001] The invention relates to the field of seawater desalination technology, in particular to a novel seawater desalination technology method for pretreatment of source water using a biological method. Background technique [0002] In the seawater desalination process, the seawater drawn from the ocean (hereinafter referred to as source water) must be pretreated to remove suspended solids, colloids, chroma, turbidity, organic matter, etc. in the seawater, which hinder the operation of the subsequent reverse osmosis device. of impurities. Pretreatment mainly includes pretreatment dosing devices, mechanical filtration, ion wells, precision filtration and other systems; traditional pretreatment methods mainly consist of processes such as sterilization, sedimentation, filtration, softening and degassing. In order to strengthen the treatment effect on tiny particles and microorganisms, new seawater pretreatment methods such as microfiltration, ultrafiltration, ...

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Problems solved by technology

[0004] In addition, although the traditional source water pretreatment process has carried out mechanical filtration, ion well, precision filtration, and chemical treatment, its effect is still not good. During the seawater desalination production process, the reverse osmosis membrane group should be cleaned regularly (different The cleaning cycle of the water body is somewhat different, generally two to three months), because the cleaning process will reduce the service life of the membrane group, thus further increasing the cost of seawater desalination

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