Solar desalination process and integrated equipment

Abstract

The invention relates to a method and a complete device for desalting sea water by using a solar energy membrane method. The complete device is composed of three parts of a solar energy photovoltaic cell system, a sea water pretreatment system and a reverse osmosis desalination system. The solar energy photovoltaic cell system comprises a solar cell panel, a frame, a back component arranged at the back of the solar cell panel and a storage battery for storing electric energy, as well as a current converter. The solar energy photovoltaic cell system supplies energy sources for the sea water pretreatment system and the reverse osmosis desalination system. After the sea water is processed by the sea water pretreatment system, seaweed, plankton, suspended matters, colloid and bacteria are eliminated; then the sea water is pumped into reverse osmosis; and finally fresh water and brine water (concentrated water) are obtained through reverse osmosis desalination. The fresh water obtained by adopting the method conforms to the 'Sanitary Standard for Drinking Water' GB5749-2006, thereby directly being used for production water and domestic water.

Description

technical field [0001] The invention relates to a seawater desalination method and a complete set of device, in particular to a seawater desalination method and a complete set of device based on solar power supply and membrane separation. Background technique [0002] The total global water reserves are 1.386 billion km3, seawater accounts for 96.5%, and the surface fresh water and shallow underground fresh water available to humans are only 0.79%, and the distribution is extremely uneven with regions and seasons. The shortage of fresh water resources has become one of the three major environmental problems in the 21st century. Therefore, the technology of desalination and direct utilization of sea water has become a high-tech that all countries attach great importance to, and it is also one of the important measures to solve the water resource crisis in our country. Asking for water and resources from the sea is a realistic choice to solve the shortage of fresh water resour...

AI Technical Summary

Problems solved by technology

Reverse osmosis (usually also called ultrafiltration or membrane) is a seawater desalination technology that has developed rapidly in recent years. The disadvantages are also more prominent: First, if single-stage reverse osmosis desalination is used, the boron and bromide in the product (desalinated water) exceed the standard, which does not meet the GB5749-2006 "Drinking Water Hygienic Standard", and cannot be used as drinking water. If it is Using two-stage or multi-stage reverse osmosis desalination, although the product (desalinated water) can meet GB5749-2006 "Drinking Water Sanitation Standard", but the production cost is relatively high

Second, the power consumption is large and the cost is high

In the pretreatment of seawater in the reverse osmosis desalination module, flocculants are added for flocculation treatment. First, the cost is increased, and second, new chemical substances are added, which leads to the risk of secondary chemical pollution.

When preparing fresh water by reverse osmosis filtration in the reverse osmosis desalination module, the structure of the reverse osmosis module components is not disclosed, nor is the reverse osmosis membrane material used. However, the fresh water prepared by many reverse osmosis membrane materials cannot meet GB5749 -2006 "Drinking Water Hygienic Standards"

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