Double spiral blade type deep sea medium and small-sized seawater desalinizer

Abstract

The invention discloses a double spiral blade type deep sea medium and small-sized seawater desalinizer. The double spiral blade type seawater desalinizer mainly comprises a hollow pretreatment filtering box, a reverse osmosis semi-permeable membrane assembly shaft, booster pumps, planetary wheels, a left spiral blade, a right spiral blade and the like, wherein the integral structure is arranged at a position 30 meters below the depth of seawater; seawater enters the hollow pretreatment filtering box under seawater pressure at the depth; pretreated water enters the booster pumps; after pressurization, the pretreated water is conveyed to the reverse osmosis semi-permeable membrane assembly shaft through water conveying pipes; the water desalinated by the reverse osmosis semi-permeable membrane assembly shaft is sequentially input into an ultraviolet sterilizer and an ozone sterilizer for sterilization; and finally fresh water enters a water storage tank to output fresh water, wherein the surging of seawater causes the left spiral blade and the right spiral blade to rotate around the reverse osmosis semi-permeable membrane assembly shaft, gears on the left spiral blade and the rightspiral blade drive the planetary wheels to rotate, so that the booster pumps achieve the purpose of boosting pressure, and a rod-shaped ultrasonic descaler descales the reverse osmosis semi-permeablemembrane assembly shaft and the hollow pretreatment filtering tank.

Description

[0001] Technical field: It belongs to the technical field of ocean development and seawater desalination. Background technique: [0002] The development and utilization of seawater desalination is a research hotspot in recent years, and it is also one of the green water sources. [0003] The seawater desalinator converts seawater into fresh water and merges it into domestic water, which is ecological and environmentally friendly. [0004] At present, seawater desalination methods mainly include: distillation, electrodialysis and reverse osmosis, among which: distillation is mainly used in large-scale seawater desalination and places with abundant energy; electrodialysis uses ion exchange membranes under the action of an electric field to separate salt water Anion and cation, so as to reduce the concentration of salt in the fresh water chamber and obtain a membrane separation technology for fresh water, but there are shortcomings such as strict water quality requirements and th...

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Problems solved by technology

[0004] At present, seawater desalination methods mainly include: distillation, electrodialysis and reverse osmosis, among which: distillation is mainly used in large-scale seawater desalination and places with abundant energy; electrodialysis uses ion exchange membranes under the action of an electric field to separate salt water Anion and cation, so as to reduce the concentration of salt in the fresh water chamber and obtain a membrane separation technology for fresh water, but there are shortcomings such as strict water quality requirements and the need for pretreatment of raw water, and poor adaptability; reverse osmosis method, using reverse osmosis The desalination rate of semi-permeable membrane desalinated seawater is very high, so it is widely used in seawater desalination; for this reason, this patent proposes a double-helical blade type deep sea medium and small seawater desalination device, which uses seawater surge to generate pressure from the booster pump and the pressure of deep seawater Perform high-concentration reverse osmosis to generate fresh water, realize the miniaturization and flexibility of seawater desalination devices, and supply water to islands and marine facilities far away from land, with strong applicability, convenient life and energy saving

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